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NSYSU
1.
Wang, Jhih-Kai.
Battery Power System with Online SOC and SOH Calibration.
Degree: Master, Electrical Engineering, 2016, NSYSU
URL: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0627116-174422
► A laboratory battery power source is set up by four buck-boost type battery power modules (BPMs) with lithium iron phosphate (LiFePO4) batteries. Real-time estimations of…
(more)
▼ A laboratory battery power source is set up by four buck-boost type battery power modules (BPMs) with lithium iron phosphate (LiFePO4) batteries. Real-time estimations of batteries'
state-of-charges (SOCs) and
state-of-healths (SOHs) by the coulomb counting method are possible since the batteries in BPMs can be individually controlled during either charging or discharging cycle. A standard calibration process is proposed to assess a batteryâs SOH by deliberately charging or discharging the battery from empty to full or from full to empty with a scheduled profile. On the other hand, partial calibration can be made in the case that the estimation starts from a status neither full nor empty but ends at the point of empty or full. By identifying the maximum
charge status with standard or partial calibration, the SOH of battery in BPMs can be updated accordingly, and then the SOCs can be estimated more precisely. Experimental tests are carried out to demonstrate that the battery power system can provide an accurate online indication of batteriesâ SOCs achieve
charge equalization and at the same time achieve
charge equalization .
Advisors/Committee Members: Chin-Sien Moo (committee member), Hau-Chen Yen (chair), Hong-Tzer Yang (chair), Yong-Nong Chang (chair), Chih-Chiang Hua (chair).
Subjects/Keywords: Coulomb counting; Battery; State-of-charge (SOC); State-of-health (SOH); Battery power module (BPM)
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APA (6th Edition):
Wang, J. (2016). Battery Power System with Online SOC and SOH Calibration. (Thesis). NSYSU. Retrieved from http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0627116-174422
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Wang, Jhih-Kai. “Battery Power System with Online SOC and SOH Calibration.” 2016. Thesis, NSYSU. Accessed March 05, 2021.
http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0627116-174422.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Wang, Jhih-Kai. “Battery Power System with Online SOC and SOH Calibration.” 2016. Web. 05 Mar 2021.
Vancouver:
Wang J. Battery Power System with Online SOC and SOH Calibration. [Internet] [Thesis]. NSYSU; 2016. [cited 2021 Mar 05].
Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0627116-174422.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Wang J. Battery Power System with Online SOC and SOH Calibration. [Thesis]. NSYSU; 2016. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0627116-174422
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

NSYSU
2.
Yang, Meng-Fen.
A Polarity-Switched Flyback Conversion Circuit for Battery Charge Equalization.
Degree: Master, Electrical Engineering, 2017, NSYSU
URL: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0729117-152514
► The thesis proposes a charge equalizer with a polarity-switched flyback converter and the arrayed switches for batteries connected in series. By exchanging the arrayed switches,…
(more)
▼ The thesis proposes a
charge equalizer with a polarity-switched flyback converter and the arrayed switches for batteries connected in series. By exchanging the arrayed switches, the charger equalizer can select the target battery, which is with the lowest
state-of-
charge(
SOC). The flyback converter utilizes the full power from charger and at the same time allocate a relatively high current to the target battery. The balance charging scheme employs the constant-current constant-voltage(CC-CV) charging method and estimates the batteriesâ SOCs by the loaded voltage method. The balance charging process is accomplished by a regular charging stage, a low-current detection stage, and eventually an individual charging stage. In the first two stages, the balance charging is performed alternately by a detection mode to select a target battery and then a balancing mode to
charge it with relatively large current. At the individual charging stage, the series charging current path is cut off and the
charge equalizer charges the batteries one by one with CC-CV charging method.
Experiment tests are carried out on a battery power bank consisting of four serial lithium iron phosphate batteries with the proposed
charge equalizer. Experiment results have shown that the
charge imbalance can be effectively reduced after the regular charging stage for most practical cases. With a lower detection current, the balance charging period can be extended to further alleviate the
SOC difference among the serial batteries. Eventually, all batteries can be charged to their full capacities with individual charging, even if they are initially with extreme imbalance.
Advisors/Committee Members: Yao-Ching Hsieh (chair), Shiang-Hwua Yu (chair), Tzung-Lin Lee (chair), Chin-Sien Moo (committee member), Chih-Chiang Hua (chair).
Subjects/Keywords: Charge equalizer; Flyback converter; Arrayed switches; Constantâcurrent constant-voltage (CC-CV) charging method; Lithium iron phosphate battery; State-of-charge (SOC)
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Yang, M. (2017). A Polarity-Switched Flyback Conversion Circuit for Battery Charge Equalization. (Thesis). NSYSU. Retrieved from http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0729117-152514
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Yang, Meng-Fen. “A Polarity-Switched Flyback Conversion Circuit for Battery Charge Equalization.” 2017. Thesis, NSYSU. Accessed March 05, 2021.
http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0729117-152514.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Yang, Meng-Fen. “A Polarity-Switched Flyback Conversion Circuit for Battery Charge Equalization.” 2017. Web. 05 Mar 2021.
Vancouver:
Yang M. A Polarity-Switched Flyback Conversion Circuit for Battery Charge Equalization. [Internet] [Thesis]. NSYSU; 2017. [cited 2021 Mar 05].
Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0729117-152514.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Yang M. A Polarity-Switched Flyback Conversion Circuit for Battery Charge Equalization. [Thesis]. NSYSU; 2017. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0729117-152514
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

NSYSU
3.
NG, Kong-Soon.
Configuration and Operation of Battery Power Modules.
Degree: PhD, Electrical Engineering, 2009, NSYSU
URL: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0723109-233027
► A novel battery power system configured by the battery power modules (BPMs) is proposed. Each BPM consists of a single battery pack or a battery…
(more)
▼ A novel battery power system configured by the battery power modules (BPMs) is proposed. Each BPM consists of a single battery pack or a battery bank equipped with an associated DC/DC converter. The output ports of BPMs can be connected in series for the high voltage applications, or in parallel to cope with a higher power or energy. For a large scale battery power system, a number of BPMs can be arrayed with combination of series and parallel connections to meet the load requirements. These all configurations allow the BPMs be operated individually. Consequently, the discharging currents of the batteries can be independently controlled, but coordinated to provide a full amount of the load current.
The performances of BPMs connected in both parallel and series at outputs are analyzed theoretically and discussed from the experimental results. Batteries operating independently do not suffer from
charge imbalance, and thus can avoid being over-charged or over-discharged, so that the life cycle can be prolonged. Furthermore, sophisticated discharging profiles such as intermittent currents can be realized to equalize the charges and thus to efficiently utilize the available stored energy in batteries. During the operation period, some of the batteries may take rest or be isolated from the system for the open-circuit measurement, facilitating the estimation of the
state-of-
charge (
SOC) and the evaluation of the
state-of-health (SOH).
With the benefit of independent operation, the BPMs can be discharged with a scheduled current profile, such as intermittent discharging. The investigation results show that the average current plays the most important role in current discharging. By detecting the battery voltage at the break time, an
SOC estimation method based on the dynamically changed open-circuit voltage exhibits an acceptable accuracy in a shorter time with considerations of the previous charging/discharging currents and the depth-of- discharge (DOD). In addition, the coulomb counting method can be enhanced by evaluating the SOH at the exhausted and fully charged states, which can be intended on the independently operated BPMs. Through the experiments that emulate practical operations, the
SOC estimation methods are verified on lead-acid batteries and lithium-ion batteries to demonstrate the effectiveness and accuracy.
Advisors/Committee Members: Jia-You Lee (chair), Tsair-Rong Chen (chair), Jiann-Fuh Chen (chair), Tsorng-Juu Liang (chair), Hong-Chan Chang (chair), Chih-Chaing Hua (chair), Chin-Sien Moo (committee member), Tsai-Fu Wu (chair), Ching-Tsai Pan (chair).
Subjects/Keywords: coulomb counting; state-of-health (SOH); state-of-charge (SOC); intermittent discharging; battery power module (BPM); Battery
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
NG, K. (2009). Configuration and Operation of Battery Power Modules. (Doctoral Dissertation). NSYSU. Retrieved from http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0723109-233027
Chicago Manual of Style (16th Edition):
NG, Kong-Soon. “Configuration and Operation of Battery Power Modules.” 2009. Doctoral Dissertation, NSYSU. Accessed March 05, 2021.
http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0723109-233027.
MLA Handbook (7th Edition):
NG, Kong-Soon. “Configuration and Operation of Battery Power Modules.” 2009. Web. 05 Mar 2021.
Vancouver:
NG K. Configuration and Operation of Battery Power Modules. [Internet] [Doctoral dissertation]. NSYSU; 2009. [cited 2021 Mar 05].
Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0723109-233027.
Council of Science Editors:
NG K. Configuration and Operation of Battery Power Modules. [Doctoral Dissertation]. NSYSU; 2009. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0723109-233027

NSYSU
4.
Wu, Tsung-Hsi.
State-of-Charge Estimation with State-of-Health Calibration for Rechargeable Batteries.
Degree: PhD, Electrical Engineering, 2018, NSYSU
URL: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0113118-091530
► This dissertation is focused on the improvement of state-of-charge (SOC) estimation with the coulomb counting method for rechargeable batteries by means of state-of-health (SOH) calibration.…
(more)
▼ This dissertation is focused on the improvement of
state-of-
charge (
SOC) estimation with the coulomb counting method for rechargeable batteries by means of
state-of-health (SOH) calibration. The proposed approach intends to provide an easy-to-use solution for on-line indication with high accuracy to estimate the battery status without the need of demanding calculations or hard-earned databases. To estimate the
SOC of an aged battery more accurately, the degradation of its full capacity has to be taken into account. By scheduling the batteryâs charging/discharging current and monitoring the batteryâs status, the existing full capacity can be updated regularly by normal calibration or occasionally by partial calibration, in which the charging/discharging rates are normalized with the latest updated full capacity to agree with the batteryâs statuses. To exclude the estimation error caused by an inaccurate current, the
SOC is reset to 0% when the battery is completely exhausted and 100% for a fully charged battery. With an updated SOH, the battery C-rate is re-scaled accordingly. Experimental tests are carried out to demonstrate that the proposed method can provide an accurate online indication of batteriesâ SOCs. With an implanted error of 0.3% in current measurement, the
SOC estimation error can always be less than 1.905% after a number of SOH calibrations.
On the other hand, a laboratory battery power system is set up by four buck-boost type battery power modules (BPMs) with the lithium iron phosphate (LiFePO4) batteries to verify the proposed
SOC estimation method with SOH calibration. During the operation of the battery power bank, the BPMs are controlled individually and also work collaboratively to meet the load requirements or sharing the charging power from the DC source.
Charge equalization among batteries can be executed by individually controlling the currents either into or out from the batteries in accordance with the real-time SOCs, estimated with the proposed estimation. By identifying the maximum
charge status with normal or partial calibration, the SOHs of the batteries in BPMs can be updated accordingly, and then the SOCs can be estimated more precisely. Moreover, without interrupting the system operation, the exhausted or damaged battery can be isolated simply by turning off its corresponding active power switch of the BPM without the need of an extra mechanical switch. Experimental tests are carried out to demonstrate that the battery power system can provide an accurate online indication of batteriesâ SOCs with properly programmed discharging/charging scenarios to conduct
charge equalization, output voltage regulation, and fault tolerance throughout discharging/charging processes.
Advisors/Committee Members: Ching-Ran Lee (chair), Tsai-Fu Wu (chair), Chih-Chiang Hua (chair), Yao-Ching Hsieh (chair), Jia-You Lee (chair), Yaow-Ming Chen (chair), Chin-Sien Moo (committee member).
Subjects/Keywords: State-of-health (SOH); State-of-charge (SOC); Coulomb counting; Calibration procedures; Battery power module (BPM); Battery
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Wu, T. (2018). State-of-Charge Estimation with State-of-Health Calibration for Rechargeable Batteries. (Doctoral Dissertation). NSYSU. Retrieved from http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0113118-091530
Chicago Manual of Style (16th Edition):
Wu, Tsung-Hsi. “State-of-Charge Estimation with State-of-Health Calibration for Rechargeable Batteries.” 2018. Doctoral Dissertation, NSYSU. Accessed March 05, 2021.
http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0113118-091530.
MLA Handbook (7th Edition):
Wu, Tsung-Hsi. “State-of-Charge Estimation with State-of-Health Calibration for Rechargeable Batteries.” 2018. Web. 05 Mar 2021.
Vancouver:
Wu T. State-of-Charge Estimation with State-of-Health Calibration for Rechargeable Batteries. [Internet] [Doctoral dissertation]. NSYSU; 2018. [cited 2021 Mar 05].
Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0113118-091530.
Council of Science Editors:
Wu T. State-of-Charge Estimation with State-of-Health Calibration for Rechargeable Batteries. [Doctoral Dissertation]. NSYSU; 2018. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0113118-091530

Penn State University
5.
Shen, Zheng.
Control-Oriented Modeling, State-Of-Charge,
State-Of-Health, And Parameter Estimation Of
Batteries.
Degree: 2013, Penn State University
URL: https://submit-etda.libraries.psu.edu/catalog/18774
► Batteries are excellent energy storage devices for many applications, such as renewable energy consumer electronics, smart grids, Hybrid Electric Vehicles (HEVs), and Electric Vehicles (EVs).…
(more)
▼ Batteries are excellent energy storage devices for many applications, such as renewable
energy consumer electronics, smart grids, Hybrid Electric Vehicles (HEVs), and Electric Vehicles (EVs). Among major battery chemistries, Lead (Pb)-Acid batteries are a low-cost power source for applications ranging from hybrid and electric vehicles (HEVs) to large-scale energy storage. Lithium-Ion (Li-Ion) batteries
are also widely used in multiple applications such as HEV and EV to supply power to motors because of their high energy and power density and low weight. This research addresses four important problems for e�cient utilization of large-scale battery systems: control-oriented modeling,
State-Of-
Charge (
SOC) estimation,
State-Of-Health (SOH) estimation, and parameter estimation. Lead-Acid batteries are investigated in the areas of modeling and model-based
SOC/SOH estimation.
Solid phase di�usivity of a Li-Ion cell is measured as a study of battery parameter
estimation. Efficient simulation, design and management systems require the development
of low order but accurate models. Previous e�orts to manage battery systems are based on equivalent circuit models, which are low-order models using an equivalent circuit to approximate the battery's response. These models do not describe the
underlying electrochemical processes taking place in the battery. At the other
end of the spectrum, it is also found that while full order �rst principles models
provide reliable prediction and comprehensive understanding on multiple variables
of interest (i.e, voltage, ion di�usion, potential distributions across cells), they are
often computationally di�cult and costly to solve, since they involve complicated
coupled nonlinear partial di�erential equations (PDEs).
In this research, we develop a reduced-order Lead-Acid battery model from fi�rst principles using linearization and the Ritz discretization method. The model, even with a low-order discretization, accurately predicts the voltage response to a dynamic pulse current input and outputs spatially distributed variables of interest. As an e�cient �first principles model, the Ritz model makes an excellent candidate
for Battery Management System (BMS) model design. Also, a dynamic averaged model is developed from the Ritz model and realized by an equivalent circuit.
The circuit resistances and capacitances depend on electrochemical parameters, linking the equivalent circuit model to the underlying electrochemistry of the fi�rst principles model.
Among those built-in functionalities of the BMS in a HEV, the
State-Of-
Charge (
SOC) estimation is crucial.
SOC is the overall remaining
charge in percentage inside a defi�ned unit (cell, battery, module, or battery pack.). For an electric vehicle, the
SOC is similar to the remaining fuel for a vehicle powered by internal combustion engine.
State-Of-
Charge (
SOC) estimation for Valve-Regulated Lead-Acid
(VRLA) batteries is complicated by the switched linear nature of the underlying dynamics. A fi�rst principles nonlinear model is simplifi�ed to provide…
Advisors/Committee Members: Christopher Rahn, Dissertation Advisor/Co-Advisor, Asok Ray, Committee Member, Constantino Manuel Lagoa, Committee Member, Donghai Wang, Committee Member.
Subjects/Keywords: Battery; Ritz Method; State-Of-Charge (SOC); State-Of-Health (SOH); Parameter Estimation; Solid Phase Diffusivity
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Shen, Z. (2013). Control-Oriented Modeling, State-Of-Charge,
State-Of-Health, And Parameter Estimation Of
Batteries. (Thesis). Penn State University. Retrieved from https://submit-etda.libraries.psu.edu/catalog/18774
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Shen, Zheng. “Control-Oriented Modeling, State-Of-Charge,
State-Of-Health, And Parameter Estimation Of
Batteries.” 2013. Thesis, Penn State University. Accessed March 05, 2021.
https://submit-etda.libraries.psu.edu/catalog/18774.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Shen, Zheng. “Control-Oriented Modeling, State-Of-Charge,
State-Of-Health, And Parameter Estimation Of
Batteries.” 2013. Web. 05 Mar 2021.
Vancouver:
Shen Z. Control-Oriented Modeling, State-Of-Charge,
State-Of-Health, And Parameter Estimation Of
Batteries. [Internet] [Thesis]. Penn State University; 2013. [cited 2021 Mar 05].
Available from: https://submit-etda.libraries.psu.edu/catalog/18774.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Shen Z. Control-Oriented Modeling, State-Of-Charge,
State-Of-Health, And Parameter Estimation Of
Batteries. [Thesis]. Penn State University; 2013. Available from: https://submit-etda.libraries.psu.edu/catalog/18774
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
6.
Gonzalez Angel , Alvaro Jose.
DISEÑO E IMPLEMENTACIÓN DE UN SISTEMA DE MONITOREO PARA UN BANCO DE BATERÍAS
.
Degree: 2015, Universidad de los Andes
URL: http://documentodegrado.uniandes.edu.co/documentos/200817135_fecha_2015_01_23_hora_10_42_21_parte_1.pdf
► Hoy en da existen muchas aplicaciones que tienen como fuente de energa un arreglo de bateras; como UPS, energas renovables, carros electricos, y bancos de…
(more)
▼ Hoy en da existen muchas aplicaciones que tienen como fuente de energa un arreglo de bateras; como UPS, energas renovables, carros electricos, y bancos de bateras. Estas aplicaciones van creciendo con el aumento de las necesidades de la industria y mantienen su dependencia en las bateras. En Colombia las industrias que mas usan los bancos de bateras son las UPS y las telecomunicaciones. Estos sistemas tienen el riesgo de fallar por la falla de una batera la cual no se conoce su estado hasta que falla. Para predecir cuando va a fallar un batera se utiliza un BMS (battery Managment System) el cual tiene con funcion indicar el estado de la batera y predecir cuando esta va a fallar, para poder ser reemplazada sin comprometer el sistema. El problema de estos sistemas es que son muy costosos por lo tanto se preere tener dos bancos de bateras por separado.
Advisors/Committee Members: Ramos Lopez Gustavo (advisor).
Subjects/Keywords: Battery Monitoring System (BMS);
State of Charge(SOC);
State of Health(SOC)
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Gonzalez Angel , A. J. (2015). DISEÑO E IMPLEMENTACIÓN DE UN SISTEMA DE MONITOREO PARA UN BANCO DE BATERÍAS
. (Thesis). Universidad de los Andes. Retrieved from http://documentodegrado.uniandes.edu.co/documentos/200817135_fecha_2015_01_23_hora_10_42_21_parte_1.pdf
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Gonzalez Angel , Alvaro Jose. “DISEÑO E IMPLEMENTACIÓN DE UN SISTEMA DE MONITOREO PARA UN BANCO DE BATERÍAS
.” 2015. Thesis, Universidad de los Andes. Accessed March 05, 2021.
http://documentodegrado.uniandes.edu.co/documentos/200817135_fecha_2015_01_23_hora_10_42_21_parte_1.pdf.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Gonzalez Angel , Alvaro Jose. “DISEÑO E IMPLEMENTACIÓN DE UN SISTEMA DE MONITOREO PARA UN BANCO DE BATERÍAS
.” 2015. Web. 05 Mar 2021.
Vancouver:
Gonzalez Angel AJ. DISEÑO E IMPLEMENTACIÓN DE UN SISTEMA DE MONITOREO PARA UN BANCO DE BATERÍAS
. [Internet] [Thesis]. Universidad de los Andes; 2015. [cited 2021 Mar 05].
Available from: http://documentodegrado.uniandes.edu.co/documentos/200817135_fecha_2015_01_23_hora_10_42_21_parte_1.pdf.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Gonzalez Angel AJ. DISEÑO E IMPLEMENTACIÓN DE UN SISTEMA DE MONITOREO PARA UN BANCO DE BATERÍAS
. [Thesis]. Universidad de los Andes; 2015. Available from: http://documentodegrado.uniandes.edu.co/documentos/200817135_fecha_2015_01_23_hora_10_42_21_parte_1.pdf
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

NSYSU
7.
Chen, Wen-Chih.
Investigation on Operating Characteristics of Individual Cell among Battery Pack.
Degree: Master, Electrical Engineering, 2006, NSYSU
URL: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0704106-160156
► Due to the discrepancy among series-connected cells in a lead-acid battery pack, the restored capacities may not be the same during the charging/discharging processes. Through…
(more)
▼ Due to the discrepancy among series-connected cells in a lead-acid battery pack, the restored capacities may not be the same during the charging/discharging processes. Through repeated charging and discharging, one can find that the unbalance of individual series-connected battery cell of lead-acid battery is getting worse, because those cells of poor
state of
charge may have negative voltage, causing reverse charging from the other cells. This abnormal operation results in not only more energy consumption, but also the acceleration of the battery-cell aging and the remarkable reduction of its lifetime.
For the purpose of investigating this problem, the operating characteristics of each cell is under study. The battery cells are purposely charged by different floating voltages and discharged by different cutoff voltages. The investigation results show that the lifecycles of battery cells are affected more significantly by floating charging voltage than by the discharging cutoff voltage. It is also found that a long time reverse charging has a destructive effect on the battery cells.
Advisors/Committee Members: Tsai-Rong Chen (chair), Yao-Ching Hsieh (chair), Mu-Ping Chen (chair), Chih-Chiang Hua (chair), Chin-Sien Moo (committee member).
Subjects/Keywords: battery cell; reverse charging; state of charge (SOC)
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Chen, W. (2006). Investigation on Operating Characteristics of Individual Cell among Battery Pack. (Thesis). NSYSU. Retrieved from http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0704106-160156
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Chen, Wen-Chih. “Investigation on Operating Characteristics of Individual Cell among Battery Pack.” 2006. Thesis, NSYSU. Accessed March 05, 2021.
http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0704106-160156.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Chen, Wen-Chih. “Investigation on Operating Characteristics of Individual Cell among Battery Pack.” 2006. Web. 05 Mar 2021.
Vancouver:
Chen W. Investigation on Operating Characteristics of Individual Cell among Battery Pack. [Internet] [Thesis]. NSYSU; 2006. [cited 2021 Mar 05].
Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0704106-160156.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Chen W. Investigation on Operating Characteristics of Individual Cell among Battery Pack. [Thesis]. NSYSU; 2006. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0704106-160156
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

McMaster University
8.
Farag, Mohammed.
Lithium-Ion Batteries: Modelling and State of Charge Estimation.
Degree: MASc, 2013, McMaster University
URL: http://hdl.handle.net/11375/15253
► Lithium-ion (Li-ion) cells are increasingly used in many applications affecting our daily life, such as laptops computers, cell phones, digital cameras, and other portable…
(more)
▼ Lithium-ion (Li-ion) cells are increasingly used in many applications affecting our daily life, such as laptops computers, cell phones, digital cameras, and other portable electronic devices. Lithium-ion batteries are increasingly being considered for their use in Electric Vehicles (EV), Hybrid Electric Vehicles (HEV) and Plug-in Hybrid Electric Vehicles (PHEV) due to their high energy density, slow loss of charge when not in use, and for lack of hysteresis effect. New application domains for these batteries has placed greater emphasis on their energy management, monitoring and control strategies. In this thesis, a comparative study between different models and state of charge (SOC) estimation strategies is performed. Battery models range from black-box representation to detailed electrochemical reaction models that consider the underlying physics. The state of charge is estimated using the Extended Kalman filter (EKF) and the Smooth Variable Structure Filter (SVSF). The models and SOC estimation strategies are applied to experimental results from BMW Electrical and Hybrid Research and Development center and validated using a simulation model from AVL CRUISE software. Overall, different models and SOC estimation scenarios were studied. An average improvement of 30% in the estimation accuracy was shown by the SVSF SOC method when compared with the EKF SOC strategy. In general, the SVSF SOC estimation technique demonstrates excellent capability and a fast speed of convergence.
Master of Applied Science (MASc)
Advisors/Committee Members: Habibi, Saeid, Ali Emadi, Gillian R. Goward, Mechanical Engineering.
Subjects/Keywords: Lithium-Ion; Batteries; Modelling; State of Charge; Estimation; SOC; Computer Engineering; Engineering; Mechanical Engineering; Computer Engineering
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Farag, M. (2013). Lithium-Ion Batteries: Modelling and State of Charge Estimation. (Masters Thesis). McMaster University. Retrieved from http://hdl.handle.net/11375/15253
Chicago Manual of Style (16th Edition):
Farag, Mohammed. “Lithium-Ion Batteries: Modelling and State of Charge Estimation.” 2013. Masters Thesis, McMaster University. Accessed March 05, 2021.
http://hdl.handle.net/11375/15253.
MLA Handbook (7th Edition):
Farag, Mohammed. “Lithium-Ion Batteries: Modelling and State of Charge Estimation.” 2013. Web. 05 Mar 2021.
Vancouver:
Farag M. Lithium-Ion Batteries: Modelling and State of Charge Estimation. [Internet] [Masters thesis]. McMaster University; 2013. [cited 2021 Mar 05].
Available from: http://hdl.handle.net/11375/15253.
Council of Science Editors:
Farag M. Lithium-Ion Batteries: Modelling and State of Charge Estimation. [Masters Thesis]. McMaster University; 2013. Available from: http://hdl.handle.net/11375/15253

Penn State University
9.
Safi, Jariullah.
On State of Charge Estimation Accuracy for Battery Cells Connected in Series.
Degree: 2015, Penn State University
URL: https://submit-etda.libraries.psu.edu/catalog/25063
► This thesis studies the joint estimation of state of charge (SOC) and current sensor bias in a series string of battery cells. Specifically we present…
(more)
▼ This thesis studies the joint estimation of
state of
charge (
SOC) and current sensor bias in a series string of battery cells. Specifically we present - for the first time - a rigorous analysis of the benefits of estimating the
SOC of multiple cells in a series string together along with supporting simulation evidence and discuss the role and benefits of
SOC heterogeneity in a string of identical cells.
While our approach applies generally to most battery chemistries, this thesis focuses on Lithium-Ion cells. We show through derivation of a Fisher information (FI) matrix using a linear first order integrator model of a cell that estimate variance decreases as a larger number of series connected cells is modeled together. The same derivation concludes that the presence of cells with a higher open-circuit voltage vs
SOC slope can improve estimate variance even in small strings. We then test the results of the derivation in simulation for both an initial condition estimation problem and a
state estimation problem representative of online estimation in battery management systems. This process introduces a modified dual polarization type equivalent circuit model of Lithium Ion batteries. This model maps a combination of the diffusion states and the
state of
charge to the output voltage: a nuance inspired by the output equation of a physics-based battery model. A discussion of model identification and the design of an extended Kalman filter (EKF) for a string composed of an arbitrary number of cells follows. For these purposes the initial conditions of all cells are unknown and the string current measurement is assumed to be biased. We then study the performance of the filter as a function of the number of modeled cells, the voltage vs
SOC slope of individual cells (achieved by using different initial conditions for some cells), and the statistics of the current sensor. Monte Carlo simulations against a high fidelity physics based model of a Lithium-Iron-Phosphate string of cells show that increasing the number of modeled cells and heterogeneity in cell initial conditions can improve estimator performance in the presence of current noise: a result that extends earlier analyses of the impact of current bias. The thesis concludes with a discussion of the results as well as some pack design recommendations.
Advisors/Committee Members: Hosam Kadry Fathy, Thesis Advisor/Co-Advisor, Sean N Brennan, Thesis Advisor/Co-Advisor.
Subjects/Keywords: batteries; extended kalman filter; fisher information; cramer rao lower bound; bias; collective; estimation; state of charge; SOC
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Safi, J. (2015). On State of Charge Estimation Accuracy for Battery Cells Connected in Series. (Thesis). Penn State University. Retrieved from https://submit-etda.libraries.psu.edu/catalog/25063
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Safi, Jariullah. “On State of Charge Estimation Accuracy for Battery Cells Connected in Series.” 2015. Thesis, Penn State University. Accessed March 05, 2021.
https://submit-etda.libraries.psu.edu/catalog/25063.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Safi, Jariullah. “On State of Charge Estimation Accuracy for Battery Cells Connected in Series.” 2015. Web. 05 Mar 2021.
Vancouver:
Safi J. On State of Charge Estimation Accuracy for Battery Cells Connected in Series. [Internet] [Thesis]. Penn State University; 2015. [cited 2021 Mar 05].
Available from: https://submit-etda.libraries.psu.edu/catalog/25063.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Safi J. On State of Charge Estimation Accuracy for Battery Cells Connected in Series. [Thesis]. Penn State University; 2015. Available from: https://submit-etda.libraries.psu.edu/catalog/25063
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Université de Grenoble
10.
Nazer, Rouba Al.
Système de mesure d'impédance électrique embarqué, application aux batteries Li-ion : Study of a battery monitoring system for electric vehicle, application for Li-ion batteries.
Degree: Docteur es, Signal, image, paroles, télécoms, 2014, Université de Grenoble
URL: http://www.theses.fr/2014GRENT007
► La mesure d'impédance électrique en embarqué sur véhicule est un sujet clé pour améliorer les fonctions de diagnostic d'un pack batterie. On cherche en particulier…
(more)
▼ La mesure d'impédance électrique en embarqué sur véhicule est un sujet clé pour améliorer les fonctions de diagnostic d'un pack batterie. On cherche en particulier à fournir ainsi des mesures supplémentaires à celles du courant pack et des tensions cellules, afin d'enrichir les indicateurs de vieillissement dans un premier temps, et d'état de santé et de charge dans un second temps. Une méthode classique de laboratoire pour obtenir des mesures d'impédance d'une batterie est la spectroscopie d'impédance électrochimique (ou EIS). Elle consiste à envoyer un signal sinusoïdal en courant (ou tension) de fréquence variable balayant une gamme de fréquences d'intérêt et mesurer ensuite la réponse en tension (ou courant) pour chaque fréquence. Une technique d'identification active basée sur l'utilisation des signaux large bande à motifs carrés est proposée. En particulier, des simulations ont permis de comparer les performances d'identification de différents signaux d'excitation fréquemment utilisés dans le domaine de l'identification et de vérifier les conditions correspondant à un comportement linéaire et invariant dans le temps de l'élément électrochimique. L'évaluation de la qualité d'estimation est effectuée en utilisant une grandeur spécifique : la cohérence. Cette grandeur statistique permet de déterminer un intervalle de confiance sur le module et la phase de l'impédance estimée. Elle permet de sélectionner la gamme de fréquence où la batterie respecte les hypothèses imposées par la méthode d'identification large bande. Afin de valider les résultats, une électronique de test a été conçue. Les résultats expérimentaux permettent de mettre en valeur l'intérêt de cette approche par motifs carrés. Un circuit de référence est utilisé afin d'évaluer les performances en métrologie des méthodes. L'étude expérimentale est ensuite poursuivie sur une batterie Li-ion soumise à un courant de polarisation et à différents états de charge. Des essais comparatifs avec l'EIS sont réalisés. Le cahier de charge établi à l'aide d'un simulateur de batterie Li-ion a permis d'évaluer les performances de la technique large bande proposée et de structurer son utilité pour l'estimation des états de vieillissement et de charge.
Embedded electrical impedance measurement is a key issue to enhance battery monitoring and diagnostic in a vehicle. It provides additional measures to those of the pack's current and cell's voltage to enrich the aging's indicators in a first time, and the battery states in a second time. A classical method for battery impedance measurements is the electrochemical impedance spectroscopy (EIS). At each frequency, a sinusoidal signal current (or voltage) of a variable frequency sweeping a range of frequencies of interest is at the input of the battery and the output is the measured voltage response (or current). An active identification technique based on the use of wideband signals composed of square patterns is proposed. Particularly, simulations were used to compare the performance of different excitation signals…
Advisors/Committee Members: Martin, Nadine (thesis director).
Subjects/Keywords: Identification non paramétrique; Batterie Li-ion; Impédance électrique; Etat de charge (SOC); Etat de santé (SOH); BMS; Non parametric identification; Li-ion batteries; Electrical impedance; State of charge (SOC; State of health (SOH); BMS; 620
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Nazer, R. A. (2014). Système de mesure d'impédance électrique embarqué, application aux batteries Li-ion : Study of a battery monitoring system for electric vehicle, application for Li-ion batteries. (Doctoral Dissertation). Université de Grenoble. Retrieved from http://www.theses.fr/2014GRENT007
Chicago Manual of Style (16th Edition):
Nazer, Rouba Al. “Système de mesure d'impédance électrique embarqué, application aux batteries Li-ion : Study of a battery monitoring system for electric vehicle, application for Li-ion batteries.” 2014. Doctoral Dissertation, Université de Grenoble. Accessed March 05, 2021.
http://www.theses.fr/2014GRENT007.
MLA Handbook (7th Edition):
Nazer, Rouba Al. “Système de mesure d'impédance électrique embarqué, application aux batteries Li-ion : Study of a battery monitoring system for electric vehicle, application for Li-ion batteries.” 2014. Web. 05 Mar 2021.
Vancouver:
Nazer RA. Système de mesure d'impédance électrique embarqué, application aux batteries Li-ion : Study of a battery monitoring system for electric vehicle, application for Li-ion batteries. [Internet] [Doctoral dissertation]. Université de Grenoble; 2014. [cited 2021 Mar 05].
Available from: http://www.theses.fr/2014GRENT007.
Council of Science Editors:
Nazer RA. Système de mesure d'impédance électrique embarqué, application aux batteries Li-ion : Study of a battery monitoring system for electric vehicle, application for Li-ion batteries. [Doctoral Dissertation]. Université de Grenoble; 2014. Available from: http://www.theses.fr/2014GRENT007

NSYSU
11.
Chen, Pei-Lin.
Charging/Discharging Strategy with Differential Voltage Method for Lithium Iron Phosphate Battery.
Degree: Master, Electrical Engineering, 2017, NSYSU
URL: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0807117-154135
► This research attempts to develop a tactical operational strategy for the lithium iron phosphate battery to improve the energy efficiency and flexibility. To improve the…
(more)
▼ This research attempts to develop a tactical operational strategy for the lithium iron phosphate battery to improve the energy efficiency and flexibility. To improve the energy efficiency and shorten the charging time, the proposed strategy sacrifices a part of the available capacity by making use of the flat-voltage region for general purpose running. On the other hand, the upper and lower limits of the safe operation can be expanded in accordance with the experimental evidences of over-charging/discharging and
state-of-health (SOH) tracking. To realize this operation strategy, the battery charging and discharging characteristics are analyzed to induce the more efficient operation region. Accordingly, the voltage differential approach is figured out with constant-current charging. Then, the cut-off points can be determined without the need of the battery parameters from the manufacturer or an accurate estimation of the
state-of-
charge (
SOC), disregarding to differences on battery operating characteristics.
The feasibility of the proposed strategy has been demonstrated with three different brands of lithium iron phosphate batteries, which are named as A, S, and K, respectively. As compared to the conventionally used constant-current constant-voltage (CC-CV) scheme with a charging/discharging rate of 1 C, Batteries A and S with the differential voltage approach, have a less capacity of 12 % and 10 %, but can shorten the charging time by 16 % and 12 % with improved energy efficiencies of 0.76 % and 0.49 %, respectively, while Battery K has a reduced capacity of about 20 %, but a 31 % shorter charging time with an improved energy efficiency of 0.50 %. Exemplar experiments indicate that Battery A can be over charged by 13 % for a predicative longer duration and has a residual capacity of 9 % for emergent running.
Advisors/Committee Members: Chin-Sien Moo (committee member), Yau-Ching Hsieh (chair), Tzai-Fu Lin (chair), Hung-Liang Cheng (chair), Yung-Nung Chang (chair).
Subjects/Keywords: lithium iron phosphate battery; differential voltage approach; Constant-current constant-voltage charging method; over-charging/discharging; state-of-charge (SOC); state-of-health (SOH)
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Chen, P. (2017). Charging/Discharging Strategy with Differential Voltage Method for Lithium Iron Phosphate Battery. (Thesis). NSYSU. Retrieved from http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0807117-154135
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Chen, Pei-Lin. “Charging/Discharging Strategy with Differential Voltage Method for Lithium Iron Phosphate Battery.” 2017. Thesis, NSYSU. Accessed March 05, 2021.
http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0807117-154135.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Chen, Pei-Lin. “Charging/Discharging Strategy with Differential Voltage Method for Lithium Iron Phosphate Battery.” 2017. Web. 05 Mar 2021.
Vancouver:
Chen P. Charging/Discharging Strategy with Differential Voltage Method for Lithium Iron Phosphate Battery. [Internet] [Thesis]. NSYSU; 2017. [cited 2021 Mar 05].
Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0807117-154135.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Chen P. Charging/Discharging Strategy with Differential Voltage Method for Lithium Iron Phosphate Battery. [Thesis]. NSYSU; 2017. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0807117-154135
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

McMaster University
12.
Ahmed, Ryan.
Modeling and State of Charge Estimation of Electric Vehicle Batteries.
Degree: PhD, 2014, McMaster University
URL: http://hdl.handle.net/11375/16436
► Electric vehicles have received substantial attention in the past few years since they provide a more sustainable, efficient, and greener transportation alternative in comparison to…
(more)
▼ Electric vehicles have received substantial attention in the past few years since they provide a more sustainable, efficient, and greener transportation alternative in comparison to conventional fossil-fuel powered vehicles. Lithium-Ion batteries represent the most important component in the electric vehicle powertrain and thus require accurate monitoring and control. Many challenges are still facing the mass market production of electric vehicles; these challenges include battery cost, range anxiety, safety, and reliability. These challenges can be significantly mitigated by incorporating an efficient battery management system. The battery management system is responsible for estimating, in real-time, the battery
state of
charge,
state of health, and remaining useful life in addition to communicating with other vehicle components and subsystems. In order for the battery management system to effectively perform these tasks, a high-fidelity battery model along with an accurate, robust estimation strategy must work collaboratively at various power demands, temperatures, and states of life. Lithium ion batteries are considered in this research. For these batteries, electrochemical models represent an attractive approach since they are capable of modeling lithium diffusion processes and track changes in lithium concentrations and potentials inside the electrodes and the electrolyte. Therefore, electrochemical models provide a connection to the physical reactions that occur in the battery thus favoured in
state of
charge and
state of health estimation in comparison to other modeling techniques.
The research presented in this thesis focuses on advancing the development and implementation of battery models,
state of
charge, and
state of health estimation strategies. Most electrochemical battery models have been verified using simulation data and have rarely been experimentally applied. This is because most electrochemical battery model parameters are considered proprietary information to their manufacturers. In addition, most battery models have not accounted for battery aging and degradation over the lifetime of the vehicle using real-world driving cycles. Therefore, the first major contribution of this research is the formulation of a new battery
state of
charge parameterization strategy. Using this strategy, a full-set of parameters for a reduced-order electrochemical model can be estimated using real-world driving cycles while accurately calculating the
state of
charge. The developed electrochemical model-based
state of
charge parameterization strategy depends on a number of spherical shells (model states) in conjunction with the final value theorem. The final value theorem is applied in order to calculate the initial values of lithium concentrations at various shells of the electrode. Then, this value is used in setting up constraints for the optimizer in order to achieve accurate
state of
charge estimation. Developed battery models at various battery states of life can be utilized in a real-time battery management…
Advisors/Committee Members: Habibi, Saeid, Mechanical Engineering.
Subjects/Keywords: Lithium-Ion Batteries; electrochemical battery model; Battery management systems (BMS); genetic algorithm optimization; parameter identification; state of charge estimation; interacting multiple models (IMM); state of charge (SOC); state of health (SOH); filtration
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Ahmed, R. (2014). Modeling and State of Charge Estimation of Electric Vehicle Batteries. (Doctoral Dissertation). McMaster University. Retrieved from http://hdl.handle.net/11375/16436
Chicago Manual of Style (16th Edition):
Ahmed, Ryan. “Modeling and State of Charge Estimation of Electric Vehicle Batteries.” 2014. Doctoral Dissertation, McMaster University. Accessed March 05, 2021.
http://hdl.handle.net/11375/16436.
MLA Handbook (7th Edition):
Ahmed, Ryan. “Modeling and State of Charge Estimation of Electric Vehicle Batteries.” 2014. Web. 05 Mar 2021.
Vancouver:
Ahmed R. Modeling and State of Charge Estimation of Electric Vehicle Batteries. [Internet] [Doctoral dissertation]. McMaster University; 2014. [cited 2021 Mar 05].
Available from: http://hdl.handle.net/11375/16436.
Council of Science Editors:
Ahmed R. Modeling and State of Charge Estimation of Electric Vehicle Batteries. [Doctoral Dissertation]. McMaster University; 2014. Available from: http://hdl.handle.net/11375/16436

Indian Institute of Science
13.
Reddy, T Mohan.
Capacity and Life Estimation of Flooded Lead Acid Batteries using Eddy Current Sensors.
Degree: PhD, Faculty of Engineering, 2018, Indian Institute of Science
URL: http://etd.iisc.ac.in/handle/2005/2971
► Lead acid batteries are widely used in domestic, industrial and automotive applications. Even after lot of advancements in battery technologies, lead acid cells are still…
(more)
▼ Lead acid batteries are widely used in domestic, industrial and automotive applications. Even after lot of advancements in battery technologies, lead acid cells are still in use because of their high capacity and low cost. To use any battery effectively, first we should be able to identify the available capacity or
State of
Charge (
SoC). There are many techniques available to measure
SoC of a lead acid battery. One such unique method is to measure the capacity using eddy current sensors. This method is unique because it is non-obtrusive and online. Eddy current sensors (ECS) are wire wound inductors which work on the principle of electromagnetic induction. Eddy currents are the currents generated on a conductive material when it is kept in a varying magnetic. Eddy current sensors generate varying magnetic eldest and will be able to identify the properties of conductive materials like thickness, conductivity, material composition etc. Also they can be used as proximity sensors.
Lead acid batteries use lead metal as cathode. Upon usage(discharge) the lead metal converts to lead sulfate and revert back to lead after charging. These changes in lead electrode can be monitored using eddy current sensors. The impedance of an eddy current sensor will change when it is kept close to the lead electrode when the battery is charging or discharging. These impedance parameters can be monitored to determine the battery
SoC. When lead is deposited on cathode, there will be more eddy current loss in the target and the total resistance of coil increases. On the other hand, when lead is deposited on the electrode because of increase in the magnitude of eddy currents which oppose the source magnetic, the total inductance of coil decreases. We can observe exactly opposite behaviour of coil resistance and inductance when the lead electrode is converted to less conductive lead sulfate. There is a lot of research on using ECS to measure
SoC of lead acid batteries and there are still many challenges to be addressed.
First we have explained about different circuit designs we have used to monitor the battery capacity using eddy current sensors. After that, we have explained about our complete experimental setup and the procedure to measure the sensor parameters using the setup. Then, we have discussed about different issues involved in the eddy current sensing based
state of
charge measurement.
Eddy current sensors are affected by temperature variations. We have studied the coil resistance behaviour with temperature at different frequencies using simulations and experiments. We have obtained the conditions for linear variation of coil resistance with temperature. The measured temperature compensation scheme is applied and the results are discussed. We have also modified the measurement system design in order to minimize the lift o errors. We have used a metallic clamp structure to minimize the lift o errors.
We have used finite element analysis based simulations to study different design parameters and their effect on the sensitivity of eddy…
Advisors/Committee Members: Gunasekaran, M K (advisor).
Subjects/Keywords: Eddy Current Sensors; Lead Acid Batteries; State of Charge (SoC); Flodded Lead Acid Batteries; Lead Acid Battery Capacity; Lead Acid Batteries State of Health; Lead Acid Batteries State of Charge; Flodded Lead Acid Battery Charging; Lead Acid Battery; Direct Digital Synthesis; Eddy Current Sensing; Electronic Systems Engineering
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Reddy, T. M. (2018). Capacity and Life Estimation of Flooded Lead Acid Batteries using Eddy Current Sensors. (Doctoral Dissertation). Indian Institute of Science. Retrieved from http://etd.iisc.ac.in/handle/2005/2971
Chicago Manual of Style (16th Edition):
Reddy, T Mohan. “Capacity and Life Estimation of Flooded Lead Acid Batteries using Eddy Current Sensors.” 2018. Doctoral Dissertation, Indian Institute of Science. Accessed March 05, 2021.
http://etd.iisc.ac.in/handle/2005/2971.
MLA Handbook (7th Edition):
Reddy, T Mohan. “Capacity and Life Estimation of Flooded Lead Acid Batteries using Eddy Current Sensors.” 2018. Web. 05 Mar 2021.
Vancouver:
Reddy TM. Capacity and Life Estimation of Flooded Lead Acid Batteries using Eddy Current Sensors. [Internet] [Doctoral dissertation]. Indian Institute of Science; 2018. [cited 2021 Mar 05].
Available from: http://etd.iisc.ac.in/handle/2005/2971.
Council of Science Editors:
Reddy TM. Capacity and Life Estimation of Flooded Lead Acid Batteries using Eddy Current Sensors. [Doctoral Dissertation]. Indian Institute of Science; 2018. Available from: http://etd.iisc.ac.in/handle/2005/2971

Penn State University
14.
Brannen, Nicholas James.
Analysis, Design and Implementation of a Charge-Equalization Circuit for use in Automotive Battery Management Systems
.
Degree: 2008, Penn State University
URL: https://submit-etda.libraries.psu.edu/catalog/8771
► A charge-equalization circuit for an automotive battery management system has been designed and implemented. The selection of the circuit topology is based on an analysis…
(more)
▼ A
charge-equalization circuit for an automotive battery management system has been designed and implemented. The selection of the circuit topology is based on an analysis of several different topologies and criteria for utilizing the battery management system in two Penn
State research vehicles. The design process included the selection of appropriate power electronic components, the adaptation of a current-mode controller to facilitate proportional control, and the design of the necessary analog electronics and communication network. Implementation included the fabrication of a printed circuit board, the population of the board, and the testing of the sub-circuits. The system was tested for its ability to transfer prescribed currents. Recommendations for improvements are discussed.
Advisors/Committee Members: Jeffrey Scott Mayer, Thesis Advisor/Co-Advisor.
Subjects/Keywords: State of Charge; EV; Charge-Equalization Circuit; CEC; Battery Management System; BMS; Electric Vehicle; SOC
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Brannen, N. J. (2008). Analysis, Design and Implementation of a Charge-Equalization Circuit for use in Automotive Battery Management Systems
. (Thesis). Penn State University. Retrieved from https://submit-etda.libraries.psu.edu/catalog/8771
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Brannen, Nicholas James. “Analysis, Design and Implementation of a Charge-Equalization Circuit for use in Automotive Battery Management Systems
.” 2008. Thesis, Penn State University. Accessed March 05, 2021.
https://submit-etda.libraries.psu.edu/catalog/8771.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Brannen, Nicholas James. “Analysis, Design and Implementation of a Charge-Equalization Circuit for use in Automotive Battery Management Systems
.” 2008. Web. 05 Mar 2021.
Vancouver:
Brannen NJ. Analysis, Design and Implementation of a Charge-Equalization Circuit for use in Automotive Battery Management Systems
. [Internet] [Thesis]. Penn State University; 2008. [cited 2021 Mar 05].
Available from: https://submit-etda.libraries.psu.edu/catalog/8771.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Brannen NJ. Analysis, Design and Implementation of a Charge-Equalization Circuit for use in Automotive Battery Management Systems
. [Thesis]. Penn State University; 2008. Available from: https://submit-etda.libraries.psu.edu/catalog/8771
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

NSYSU
15.
Ng, Kong-Soon.
Parallel Operation of Battery Power Modules.
Degree: Master, Electrical Engineering, 2005, NSYSU
URL: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0614105-154506
► Operating batteries in parallel is attempted to overcome the problems with conventionally used battery bank, in which batteries are connected in series. The problems and…
(more)
▼ Operating batteries in parallel is attempted to overcome the problems with conventionally used battery bank, in which batteries are connected in series. The problems and the management with the operation of serial connected batteries are first addressed. The related topics to the parallel configuration are reviewed. Then, the parallel configuration with battery power modules is proposed. The battery power module can be realized with different dc-to-dc converters for different applications.
When batteries are charged in parallel, the problem of over-
charge can be avoided. With parallel operation, the discharging currents of the batteries are independently controlled but are coordinated to execute a full amount load current. This allows for scheduling the discharging profiles under different operating conditions. As a result, a sophisticated discharging profile can be realized to utilize the available stored energy in batteries. On the other hand, some of the batteries may take rest or be isolated from the system for the detections at a time. This facilitates the estimations of the
state of
charge (
SOC) and the
state of health (SOH). Moreover, the completely exhausted or damaged batteries can be isolated from the battery power supply bank without interrupting the system operation.
Experiments are carried out on battery power modules with lead-acid batteries incorporating with associated buck-boost converters. The experimental results demonstrate that a more efficient utilization of battery energy can be achieved. On the other hand, a more reasonable management can be done with simple estimation methods of the
SOC and the SOH.
Advisors/Committee Members: none (chair), Chin-Sien Moo (committee member), none (chair).
Subjects/Keywords: State of charge (SOC); State of health (SOH).; Battery power module; Parallel operation; Discharging profile; Battery management
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Ng, K. (2005). Parallel Operation of Battery Power Modules. (Thesis). NSYSU. Retrieved from http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0614105-154506
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Ng, Kong-Soon. “Parallel Operation of Battery Power Modules.” 2005. Thesis, NSYSU. Accessed March 05, 2021.
http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0614105-154506.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Ng, Kong-Soon. “Parallel Operation of Battery Power Modules.” 2005. Web. 05 Mar 2021.
Vancouver:
Ng K. Parallel Operation of Battery Power Modules. [Internet] [Thesis]. NSYSU; 2005. [cited 2021 Mar 05].
Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0614105-154506.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Ng K. Parallel Operation of Battery Power Modules. [Thesis]. NSYSU; 2005. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0614105-154506
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

NSYSU
16.
Chen, Kai-Jui.
State-of-Charge Estimation Method for LiFePO4 Electric Vehicle Batteries.
Degree: Master, Electrical Engineering, 2012, NSYSU
URL: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0911112-134700
► Battery is the sole electrical energy source when electric vehicle(EV) is moving. To reduce traveling anxiety, an effective energy management system to indicate the state-of-charge…
(more)
▼ Battery is the sole electrical energy source when electric vehicle(EV) is moving.
To reduce traveling anxiety, an effective energy management system to indicate the
state-of-
charge (
SOC) of the battery and make a balance between vehicle performance and endurance is very important. This research is aimed to develop a
SOC estimation system with high accuracy. The proposed method in this thesis is based on under load voltage and multilevel Peukert's equation to estimate the
SOC.
The proposed method is compared with the open circuit voltage method for initial
SOC estimation and with coulometric method for cumulative
SOC estimation under various EV driving conditions simulated by an adjustable electronics load. Experimental results indicate that the proposed method can provide reasonable accuracy as compared with other tested methods for LiFePO4 battery
SOC estimations.
Advisors/Committee Members: Tzung-Lin Lee (chair), Chan-Nan Lu (committee member), Rong-Ceng Leou (chair), Jen-Hao Teng (chair).
Subjects/Keywords: LiFePO4 batteries; State-of-Charge estimation
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Chen, K. (2012). State-of-Charge Estimation Method for LiFePO4 Electric Vehicle Batteries. (Thesis). NSYSU. Retrieved from http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0911112-134700
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Chen, Kai-Jui. “State-of-Charge Estimation Method for LiFePO4 Electric Vehicle Batteries.” 2012. Thesis, NSYSU. Accessed March 05, 2021.
http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0911112-134700.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Chen, Kai-Jui. “State-of-Charge Estimation Method for LiFePO4 Electric Vehicle Batteries.” 2012. Web. 05 Mar 2021.
Vancouver:
Chen K. State-of-Charge Estimation Method for LiFePO4 Electric Vehicle Batteries. [Internet] [Thesis]. NSYSU; 2012. [cited 2021 Mar 05].
Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0911112-134700.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Chen K. State-of-Charge Estimation Method for LiFePO4 Electric Vehicle Batteries. [Thesis]. NSYSU; 2012. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0911112-134700
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Colorado School of Mines
17.
La Rue, Aleksei.
Small-signal wide-band electrochemical-impedance measurements for battery management.
Degree: MS(M.S.), Mechanical Engineering, 2019, Colorado School of Mines
URL: http://hdl.handle.net/11124/173994
► Batteries with lithium-iron-phosphate cathodes paired with lithium-titante anodes (LFP-LTO) produce a complex challenge for state-of-charge (SOC) estimation due to their flat open-circuit voltage. Research for…
(more)
▼ Batteries with lithium-iron-phosphate cathodes paired with lithium-titante anodes (LFP-LTO) produce a complex challenge for
state-of-
charge (
SOC) estimation due to their flat open-circuit voltage. Research for the LFP-LTO chemistry shows that the electrochemical impedance spectra (EIS) is a possible tool for
SOC estimation. The purpose of this thesis is to contribute three developments for the system identification and characterization of LFP-LTO cell chemistry, more specifically related to EIS. The first contribution is wide bandwidth EIS identification method that is developed and validated, using experimental and simulation techniques. The identification method consists of combining measurements of the voltage response to small-signal current perturbations at varying time-scales to obtain a wide-bandwidth EIS response. The second contribution is to experimentally evaluate the variation of the EIS with
state-of-
charge for LPF batteries that was shown using a physical model in [1], which also indicated dependence of the
charge/discharge history. The history dependence is evaluated by extracting EIS for a cell at several states-of-
charge with different
charge/discharge profiles. The final contribution is a method for identifying and calibrating a
state-of-
charge prediction model for a LFP-LTO cell. This
state-of-
charge prediction model implements a LASSO regression to find the prediction mapping from EIS to
state-of-
charge.
Advisors/Committee Members: Vincent, Tyrone (advisor), Kee, R. J. (advisor), Porter, Jason M. (committee member), DeCaluwe, Steven C. (committee member).
Subjects/Keywords: electrochemical impedance; lithium; state of charge estimation; LFP-LTO; batteries; state of charge
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
La Rue, A. (2019). Small-signal wide-band electrochemical-impedance measurements for battery management. (Masters Thesis). Colorado School of Mines. Retrieved from http://hdl.handle.net/11124/173994
Chicago Manual of Style (16th Edition):
La Rue, Aleksei. “Small-signal wide-band electrochemical-impedance measurements for battery management.” 2019. Masters Thesis, Colorado School of Mines. Accessed March 05, 2021.
http://hdl.handle.net/11124/173994.
MLA Handbook (7th Edition):
La Rue, Aleksei. “Small-signal wide-band electrochemical-impedance measurements for battery management.” 2019. Web. 05 Mar 2021.
Vancouver:
La Rue A. Small-signal wide-band electrochemical-impedance measurements for battery management. [Internet] [Masters thesis]. Colorado School of Mines; 2019. [cited 2021 Mar 05].
Available from: http://hdl.handle.net/11124/173994.
Council of Science Editors:
La Rue A. Small-signal wide-band electrochemical-impedance measurements for battery management. [Masters Thesis]. Colorado School of Mines; 2019. Available from: http://hdl.handle.net/11124/173994

NSYSU
18.
Chen, Yi-Ping.
State-of-Charge Estimations for Lead-Acid and Lithium-Ion Batteries.
Degree: Master, Electrical Engineering, 2007, NSYSU
URL: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0708107-185935
► This thesis studies State-of-Charge (SOC) method for widely used lead-acid batteries and the most prospective lithium-ion batteries. First, the relationship between the battery capacity and…
(more)
▼ This thesis studies
State-of-
Charge (
SOC) method for widely used lead-acid batteries and the most prospective lithium-ion batteries. First, the relationship between the battery capacity and the open-circuit-voltage under different charging/discharging currents is investigated based on the equivalent circuit. Experimental results indicate that the open-circuit-voltage of the lead-acid battery varies regularly with the charging/discharging current and the duration of time for the battery disconnected from the load. Accordingly, a dynamic open-circuit-voltage method in considerations the open-circuit-time and the previous operating current is capable of precisely estimating the battery capacity in a shorter time. As for the lithium-ion batteries, their charging/discharging characteristics reveal that the Coulomb/Ampere-Hour Counting method is capable of yielding accurate estimations. Finally, through the experiments that emulate practical operations, the
SOC estimations of batteries are verified to demonstrate the effectiveness and accuracy of the proposed methods.
Advisors/Committee Members: Yao-Ching Hsieh (chair), Jia-You Lee (chair), Chih-Chiang Hua (chair), Chin-Sien Moo (committee member), Huang-Jen Chiu (chair).
Subjects/Keywords: lithium-ion battery; Coulomb/Ampere-Hour Counting method; dynamic open-circuit-voltage method; State-of-Charge (SOC); lead-acid battery
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Chen, Y. (2007). State-of-Charge Estimations for Lead-Acid and Lithium-Ion Batteries. (Thesis). NSYSU. Retrieved from http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0708107-185935
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Chen, Yi-Ping. “State-of-Charge Estimations for Lead-Acid and Lithium-Ion Batteries.” 2007. Thesis, NSYSU. Accessed March 05, 2021.
http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0708107-185935.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Chen, Yi-Ping. “State-of-Charge Estimations for Lead-Acid and Lithium-Ion Batteries.” 2007. Web. 05 Mar 2021.
Vancouver:
Chen Y. State-of-Charge Estimations for Lead-Acid and Lithium-Ion Batteries. [Internet] [Thesis]. NSYSU; 2007. [cited 2021 Mar 05].
Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0708107-185935.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Chen Y. State-of-Charge Estimations for Lead-Acid and Lithium-Ion Batteries. [Thesis]. NSYSU; 2007. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0708107-185935
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Virginia Tech
19.
Kerley, Ross Andrew.
Automotive Lead-Acid Battery State-of-Health Monitoring System.
Degree: MS, Electrical Engineering, 2014, Virginia Tech
URL: http://hdl.handle.net/10919/64870
► This thesis describes the development of a system to continuously monitor the battery in a car and warn the user of an upcoming battery failure.…
(more)
▼ This thesis describes the development of a system to continuously monitor the battery in a car and warn the user of an upcoming battery failure. An automotive battery endures enormous strain when it starts the engine, and when it supplies loads without the engine running. Note that the current during a cranking event often exceeds 500 Amperes. Despite the strains, a car battery still typically lasts 4-6 years before requiring replacement. There is often no warning of when a battery should be replaced and there is never a good time for a battery failure.
All currently available lead-acid battery monitoring systems use voltage and current sensing to monitor battery impedance and estimate battery health. However, such a system is costly due to the current sensor and typically requires an expert to operate the system. This thesis describes a prototype system to monitor battery
state of health and provide advance warning of an upcoming battery failure using only voltage sensing. The prototype measures the voltage during a cranking event and determines if the battery is healthy or not. The voltage of an unhealthy battery will drop lower than a healthy one, and it will not recover as quickly.
The major contributions of the proposed research to the field are an algorithm to predict automotive battery
state-of-health that is temperature-dependent and a prototype implementation of the algorithm on an ARM processor development board.
Advisors/Committee Members: Ha, Dong Sam (committeechair), Koh, Kwang-Jin (committee member), Li, Qiang (committee member).
Subjects/Keywords: Lead Acid Battery; State of Charge; State of Health
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Kerley, R. A. (2014). Automotive Lead-Acid Battery State-of-Health Monitoring System. (Masters Thesis). Virginia Tech. Retrieved from http://hdl.handle.net/10919/64870
Chicago Manual of Style (16th Edition):
Kerley, Ross Andrew. “Automotive Lead-Acid Battery State-of-Health Monitoring System.” 2014. Masters Thesis, Virginia Tech. Accessed March 05, 2021.
http://hdl.handle.net/10919/64870.
MLA Handbook (7th Edition):
Kerley, Ross Andrew. “Automotive Lead-Acid Battery State-of-Health Monitoring System.” 2014. Web. 05 Mar 2021.
Vancouver:
Kerley RA. Automotive Lead-Acid Battery State-of-Health Monitoring System. [Internet] [Masters thesis]. Virginia Tech; 2014. [cited 2021 Mar 05].
Available from: http://hdl.handle.net/10919/64870.
Council of Science Editors:
Kerley RA. Automotive Lead-Acid Battery State-of-Health Monitoring System. [Masters Thesis]. Virginia Tech; 2014. Available from: http://hdl.handle.net/10919/64870

Virginia Tech
20.
Hyun, Ji Hoon.
State of Health Estimation System for Lead-Acid Car Batteries Through Cranking Voltage Monitoring.
Degree: MS, Electrical Engineering, 2016, Virginia Tech
URL: http://hdl.handle.net/10919/71796
► The work in this thesis is focused on the development and validation of an automotive battery monitoring system that estimates the health of a lead-acid…
(more)
▼ The work in this thesis is focused on the development and validation of an automotive battery monitoring system that estimates the health of a lead-acid battery during engine cranking and provides a low
state of health (SOH) warning of potential battery failure. A reliable SOH estimation should assist users in preventing a sudden battery failure and planning for battery replacement in a timely manner.
Most commercial battery health estimation systems use the impedance of a battery to estimate the SOH with battery voltage and current; however, using a current sensor increases the installation cost of a system due to parts and labor. The battery SOH estimation method with the battery terminal voltage during engine cranking was previously proposed. The proposed SOH estimation system intends to improve existing methods. The proposed method requires battery voltages and temperature for a reliable SOH estimation. Without the need for a costly current sensor, the proposed SOH monitoring system is cost-effective and useful for automotive applications.
Measurement results presented in this thesis show that the proposed SOH monitoring system is more effective in evaluating the health of a lead-acid battery than existing methods. A low power microcontroller equipped prototype implements the proposed SOH algorithm on a high performance ARM Cortex-M4F based MCU, TM4C123GH6PM. The power dissipation of the final prototype is approximately 144 mW during an active
state and 36 mW during a sleep
state. With the reliability of the proposed method and low power dissipation of the prototype, the proposed system is suitable for an on-board battery monitoring as there is no on-board warning that estimates the health of a battery in modern cars.
Advisors/Committee Members: Ha, Dong Sam (committeechair), Li, Qiang (committee member), Koh, Kwang-Jin (committee member).
Subjects/Keywords: Lead-Acid Battery; State of Health; State of Charge
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Hyun, J. H. (2016). State of Health Estimation System for Lead-Acid Car Batteries Through Cranking Voltage Monitoring. (Masters Thesis). Virginia Tech. Retrieved from http://hdl.handle.net/10919/71796
Chicago Manual of Style (16th Edition):
Hyun, Ji Hoon. “State of Health Estimation System for Lead-Acid Car Batteries Through Cranking Voltage Monitoring.” 2016. Masters Thesis, Virginia Tech. Accessed March 05, 2021.
http://hdl.handle.net/10919/71796.
MLA Handbook (7th Edition):
Hyun, Ji Hoon. “State of Health Estimation System for Lead-Acid Car Batteries Through Cranking Voltage Monitoring.” 2016. Web. 05 Mar 2021.
Vancouver:
Hyun JH. State of Health Estimation System for Lead-Acid Car Batteries Through Cranking Voltage Monitoring. [Internet] [Masters thesis]. Virginia Tech; 2016. [cited 2021 Mar 05].
Available from: http://hdl.handle.net/10919/71796.
Council of Science Editors:
Hyun JH. State of Health Estimation System for Lead-Acid Car Batteries Through Cranking Voltage Monitoring. [Masters Thesis]. Virginia Tech; 2016. Available from: http://hdl.handle.net/10919/71796

University of Waterloo
21.
Wahlstrom, Michael.
Design of a Battery State Estimator Using a Dual Extended Kalman Filter.
Degree: 2011, University of Waterloo
URL: http://hdl.handle.net/10012/5790
► Today's automotive industry is undergoing significant changes in technology due to economic, political and environmental pressures. The shift from conventional internal combustion vehicles to hybrid…
(more)
▼ Today's automotive industry is undergoing significant changes in technology due to economic, political and environmental pressures. The shift from conventional internal combustion vehicles to hybrid and plug in hybrid electric vehicles brings with it a new host of technical challenges. As the vehicles become more electrified, and the batteries become larger, there are many difficulties facing the battery integration including both embedded control and supervisory control. A very important aspect of Li-Ion battery integration is the state estimation of the battery. State estimation can include multiple states, however the two most important are the state of charge and state of health of the battery. Determining an accurate state of charge estimation of a battery has been an important part of consumer electronics for years now [1]. In small portable electronics, the state of charge of the battery is used to determine the time remaining on the current battery charge. Although difficult, the estimation is simplified by the relatively low charge and discharge currents (approximately + 3C) of the devices and the non-dynamic duty cycle. Hybrid vehicle battery packs can reach much higher charge and discharge currents (+ 20C) [2]. This higher current combined with a very dynamic duty cycle, large changes in temperature, longer periods without usage and long life requirements make state of charge estimation in Hybrid Electric Vehicles (HEV) much more difficult. There have been a host of methods employed by various previous authors. One of the most important factors in state of charge estimation is having an accurate estimation of the actual capacity (depending on state of health) of the battery at any time [3]. Without having an understanding of the state of health of the battery, the state of charge estimation can vary greatly. This paper proposes a state of charge and state of health estimation based on a dual Extended Kalman Filter (EKF). Employing an EKF for the state estimation of the battery pack not only allows for enhanced accuracy of the estimation but allows the control engineer to develop vehicle performance criteria based not only on the state of charge estimation, but also the state of health.
Subjects/Keywords: Battery; State of Charge; Kalman Filter; Lithium Ion; State Estimation
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Wahlstrom, M. (2011). Design of a Battery State Estimator Using a Dual Extended Kalman Filter. (Thesis). University of Waterloo. Retrieved from http://hdl.handle.net/10012/5790
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Wahlstrom, Michael. “Design of a Battery State Estimator Using a Dual Extended Kalman Filter.” 2011. Thesis, University of Waterloo. Accessed March 05, 2021.
http://hdl.handle.net/10012/5790.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Wahlstrom, Michael. “Design of a Battery State Estimator Using a Dual Extended Kalman Filter.” 2011. Web. 05 Mar 2021.
Vancouver:
Wahlstrom M. Design of a Battery State Estimator Using a Dual Extended Kalman Filter. [Internet] [Thesis]. University of Waterloo; 2011. [cited 2021 Mar 05].
Available from: http://hdl.handle.net/10012/5790.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Wahlstrom M. Design of a Battery State Estimator Using a Dual Extended Kalman Filter. [Thesis]. University of Waterloo; 2011. Available from: http://hdl.handle.net/10012/5790
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
22.
Urbain, Matthieu.
Modélisation électrique et énergétique des accumulateurs Li-Ion. Estimation en ligne de la SOC et de la SOH : Energetical and electrical modelling of lithium-ion batteries.Online estimation of SOC and SOH.
Degree: Docteur es, Génie électrique, 2009, Lorraine INP
URL: http://www.theses.fr/2009INPL028N
► Ce mémoire traite de la modélisation électrique des accumulateurs lithium-ion, de l’estimation de leur état de charge (SOC) et de leur état de santé (SOH).…
(more)
▼ Ce mémoire traite de la modélisation électrique des accumulateurs lithium-ion, de l’estimation de leur état de charge (SOC) et de leur état de santé (SOH). Le premier chapitre revient sur les généralités concernant la technologie lithium-ion : caractéristiques, performances, constitution de l’élément de stockage, choix et nature des électrodes, conséquences qui en découlent d’un point de vue énergétique. Le principe de fonctionnement et les équations générales des phénomènes électrochimiques sont aussi développés. Des exemples d’application dans différents secteurs industriels sont ensuite proposés pour plusieurs gammes de puissance et d’énergie. Le second volet aborde la modélisation électrique des accumulateurs lithium-ion. Pour une meilleure compréhension des phénomènes complexes mis en jeu au sein des batteries, des éléments de modélisation physique sont exposés. Puis nous envisageons une synthèse des différents modèles de nature électrique rencontrés dans la littérature. Sur la base de campagnes de mesures menées sur un élément lithium-ion de 6,8 Ah, nous proposons, dans un troisième chapitre, notre propre modèle électrique équivalent valable pour les phases de décharge et de relaxation. En particulier nous déclinons plusieurs solutions pour distribuer l’énergie et rendre compte des différents effets de ligne. Les outils de caractérisation et les procédures d’extractions des paramètres sont traités en détail. Dans un dernier chapitre nous étudions les possibilités d’estimer en ligne l’état de charge (SOC) et l’état de santé (SOH) d’un élément lithium-ion en cours d’exploitation. Après un bref rappel des méthodes académiques et industrielles actuelles, nous nous orientons vers l’emploi d’un filtre de Kalman. Afin d’estimer ses performances par rapport au coulombmètre, nous proposons un modèle et un algorithme que nous évaluons par simulation et testons sur élément réel
This dissertation of thesis deals with the electrical modelling of lithium-ion accumulators and the determination of both state-of-charge (SOC) and state-of-health (SOH). The first chapter is focused on generalities about lithium-ion technology: characteristics, qualities, constitution of the storage device, choice and nature of the electrodes and their consequences on energetical features. The principle and the general equations of the electrochemical phenomena are developed as well. Application examples from different industrial areas are displayed for several power and energy ranges. The second section is about the electrical modelling of lithium-ion accumulators. With a view to better understand the complex electrochemical phenomena, elements of physical modelling are proposed. Then, the synthesis of different electrical models released in the press is considered. On the basis of experimental campaigns lead on a 6.8 Ah lithium-element, we proposed, in a third chapter, our own equivalent electrical model suitable for both discharge phases and relaxation period. In particular, we depict several alternatives to distribute the energy and…
Advisors/Committee Members: Davat, Bernard (thesis director), Rael, Stéphane (thesis director).
Subjects/Keywords: Batterie; Filtre de Kalman; Observateur d’état; Etat de santé; Etat de charge; SOC; SOH; Caractérisation; Modélisation; Accumulateur lithium-ion; Batteries; State observer; SOC; SOH; Accumulators; Lithium-ion; Modelling; Characterisation; State-of-charge; State-of-health; SOH; Kalman filtering
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Urbain, M. (2009). Modélisation électrique et énergétique des accumulateurs Li-Ion. Estimation en ligne de la SOC et de la SOH : Energetical and electrical modelling of lithium-ion batteries.Online estimation of SOC and SOH. (Doctoral Dissertation). Lorraine INP. Retrieved from http://www.theses.fr/2009INPL028N
Chicago Manual of Style (16th Edition):
Urbain, Matthieu. “Modélisation électrique et énergétique des accumulateurs Li-Ion. Estimation en ligne de la SOC et de la SOH : Energetical and electrical modelling of lithium-ion batteries.Online estimation of SOC and SOH.” 2009. Doctoral Dissertation, Lorraine INP. Accessed March 05, 2021.
http://www.theses.fr/2009INPL028N.
MLA Handbook (7th Edition):
Urbain, Matthieu. “Modélisation électrique et énergétique des accumulateurs Li-Ion. Estimation en ligne de la SOC et de la SOH : Energetical and electrical modelling of lithium-ion batteries.Online estimation of SOC and SOH.” 2009. Web. 05 Mar 2021.
Vancouver:
Urbain M. Modélisation électrique et énergétique des accumulateurs Li-Ion. Estimation en ligne de la SOC et de la SOH : Energetical and electrical modelling of lithium-ion batteries.Online estimation of SOC and SOH. [Internet] [Doctoral dissertation]. Lorraine INP; 2009. [cited 2021 Mar 05].
Available from: http://www.theses.fr/2009INPL028N.
Council of Science Editors:
Urbain M. Modélisation électrique et énergétique des accumulateurs Li-Ion. Estimation en ligne de la SOC et de la SOH : Energetical and electrical modelling of lithium-ion batteries.Online estimation of SOC and SOH. [Doctoral Dissertation]. Lorraine INP; 2009. Available from: http://www.theses.fr/2009INPL028N
23.
Watrin, Nicolas.
Modélisation multi-physique des batteries à base lithium et application à l'estimation de l'état de charge : Multiphysical lithium-based battery pack modeling.
Degree: Docteur es, Génie électrique, 2013, Belfort-Montbéliard
URL: http://www.theses.fr/2013BELF0210
► L’utilisation de batteries de forte puissance et possédant une énergie élevée devient un passage incontournable dans les transports de demain. Les batteries au lithium, qui…
(more)
▼ L’utilisation de batteries de forte puissance et possédant une énergie élevée devient un passage incontournable dans les transports de demain. Les batteries au lithium, qui étaient utilisées principalement pour des applications mobiles peu consommatrices d’énergie, comme les téléphones ou les ordinateurs, ont trouvées leur place au sein des chaînes de traction.L’arrivée de ces technologies implique une nouvelle façon de concevoir les véhicules, ainsi que la mobilité de manière générale. Mais dans cette approche, les constructeurs automobiles sont faces à de nombreux problèmes. Tout d’abord l’énergie électrique embarquée n’est pas un de leurs principaux corps de métier. Ensuite, cette technologie, bien que maitrisée à l’heure actuelle est encore sujette à quelques flous techniques. Une des principales contraintes des batteries au lithium est qu’il est difficile de connaitre la quantité d’énergie restante au sein de la cellule. Pour un téléphone portable, l’impact est minime, mais pour un véhicule les enjeux sont totalement différents.C’est pour répondre à cette question que SEGULA TECHNOLOGIE AUTOMOTIVE à mis en place une thèse CIFRE en partenariat avec le laboratoire IRTES. L’originalité de ces travaux repose sur l’élaboration d’un modèle multi-physique, thermique et électrique, pour des cellules de forte puissance et de forte énergie. De plus le modèle à la particularité de pouvoir être exporté vers des cellules lithium-ion et lithium-polymère, les deux technologies correspondant le mieux au besoin actuel. Enfin, la précision du modèle lui permet d’être implémenté dans un estimateur d’état de
charge temps réel, utilisable au sein des véhicules. Les travaux menés au cours de cette thèse sont récapitulés dans ce mémoire de la manière suivante.Tout d’abord un chapitre introduit les principales caractéristiques de la technologie lithium. Il s’agit dans un premier temps de montrer pourquoi nous avons eu besoin de cette technologie au sein des véhicules, pour ensuite détailler le fonctionnement de ces cellules. Dans le même chapitre, les différentes méthodes permettant la modélisation numérique de ces cellules sont introduites, ainsi que les méthodes d’estimation de leur état de
charge.Dans le second chapitre, la modélisation multi-physique est détaillée. Il s’agit ici de comprendre et de modéliser le comportement d’une cellule, en réalisant un modèle numérique équivalent permettant de reproduire les comportements électriques et thermiques. Une fois un nouveau modèle développé et validé expérimentalement, le protocole permettant de déterminer ces paramètres est détaillé. Enfin nous conclurons sur la généralisation du modèle numérique et du protocole pour les batteries lithium-ion de différentes capacités, ainsi que pour les cellules lithium-polymère.Le troisième et dernier chapitre propose un estimateur d’état de
charge basé sur le modèle numérique présenté au deuxième chapitre, utilisant un système adaptatif, le filtre de Kalman. Ce filtre réalise l’estimation d’un paramètre non mesurable (l’état de
charge) à l’aide de…
Advisors/Committee Members: Miraoui, Abdellatif (thesis director).
Subjects/Keywords: Modélisation; Etat de charge; Cellules au lithium; Modeling; State of charge; Lithium cells
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Watrin, N. (2013). Modélisation multi-physique des batteries à base lithium et application à l'estimation de l'état de charge : Multiphysical lithium-based battery pack modeling. (Doctoral Dissertation). Belfort-Montbéliard. Retrieved from http://www.theses.fr/2013BELF0210
Chicago Manual of Style (16th Edition):
Watrin, Nicolas. “Modélisation multi-physique des batteries à base lithium et application à l'estimation de l'état de charge : Multiphysical lithium-based battery pack modeling.” 2013. Doctoral Dissertation, Belfort-Montbéliard. Accessed March 05, 2021.
http://www.theses.fr/2013BELF0210.
MLA Handbook (7th Edition):
Watrin, Nicolas. “Modélisation multi-physique des batteries à base lithium et application à l'estimation de l'état de charge : Multiphysical lithium-based battery pack modeling.” 2013. Web. 05 Mar 2021.
Vancouver:
Watrin N. Modélisation multi-physique des batteries à base lithium et application à l'estimation de l'état de charge : Multiphysical lithium-based battery pack modeling. [Internet] [Doctoral dissertation]. Belfort-Montbéliard; 2013. [cited 2021 Mar 05].
Available from: http://www.theses.fr/2013BELF0210.
Council of Science Editors:
Watrin N. Modélisation multi-physique des batteries à base lithium et application à l'estimation de l'état de charge : Multiphysical lithium-based battery pack modeling. [Doctoral Dissertation]. Belfort-Montbéliard; 2013. Available from: http://www.theses.fr/2013BELF0210
24.
Abdennadher, Mohamed Karim.
Étude et élaboration d’un système de surveillance et de maintenance prédictive pour les condensateurs et les batteries utilisés dans les Alimentations Sans Interruptions (ASI) : Study and elaboration of a monitoring and predictive maintenance system for capacitors and batteries used in Uninterruptible Power Supplies (UPS).
Degree: Docteur es, Génie électrique, 2010, Université Claude Bernard – Lyon I
URL: http://www.theses.fr/2010LYO10101
► Pour assurer une énergie électrique de qualité et de façon permanente, il existe des systèmes électroniques d’alimentation spécifiques. Il s’agit des Alimentations Sans Interruptions (ASI).…
(more)
▼ Pour assurer une énergie électrique de qualité et de façon permanente, il existe des systèmes électroniques d’alimentation spécifiques. Il s’agit des Alimentations Sans Interruptions (ASI). Une ASI comme tout autre système peut tomber en panne ce qui peut entrainer une perte de redondance. Cette perte induit une maintenance corrective donc une forme d’indisponibilité ce qui représente un coût. Nous proposons dans cette thèse de travailler sur deux composants parmi les plus sensibles dans les ASI à savoir les condensateurs électrolytiques et les batteries au plomb. Dans une première phase, nous présentons, les systèmes de surveillance existants pour ces deux composants en soulignant leurs principaux inconvénients. Ceci nous permet de proposer le cahier des charges à mettre en œuvre. Pour les condensateurs électrolytiques, nous détaillons les différentes étapes de caractérisation et de vieillissement ainsi que la procédure expérimentale de vieillissement standard accéléré et les résultats associés. D’autre part, nous présentons les résultats de simulation du système de surveillance et de prédiction de pannes retenu. Nous abordons la validation expérimentale en décrivant le système développé. Nous détaillons les cartes électroniques conçues, les algorithmes mis en œuvre et leurs contraintes d’implémentation respectifs pour une réalisation temps réel. Enfin, pour les batteries au plomb étanches, nous présentons les résultats de simulation du système de surveillance retenu permettant d’obtenir le SOC et le SOH. Nous détaillons la procédure expérimentale de vieillissement en cycles de charge et décharge de la batterie nécessaire pour avoir un modèle électrique simple et précis. Nous expliquons les résultats expérimentaux de vieillissement pour finir avec des propositions d’amélioration de notre système afin d’obtenir un SOH plus précis.
To ensure power quality and permanently, some electronic system supplies exist. These supplies are the Uninterrupted Power Supplies (UPS). An UPS like any other system may have some failures. This can be a cause of redundancy loss. This load loss causes a maintenance downtime which may represent a high cost. We propose in this thesis to work on two of the most sensitive components in the UPS namely electrolytic capacitors and lead acid batteries. In a first phase, we present the existing surveillance systems for these two components, highlighting their main drawbacks. This allows us to propose the specifications which have to be implemented for this system. For electrolytic capacitors, we detail different stages of characterization ; the aging accelerated standard experimental procedure and their associated results. On the other hand, we present the simulation results of monitoring and failure prediction system retained. We discuss the experimental validation, describing the developed system. We detail the electronic boards designed, implemented algorithms and their respective constraints for a real time implementation. Finally, for lead acid batteries, we present the simulation results…
Advisors/Committee Members: Rojat, Gérard (thesis director), Venet, Pascal (thesis director).
Subjects/Keywords: Condensateurs électrolytiques; Batteries au plomb; État de charge (SOC); État de santé (SOH); Maintenance prédictive; Identification en temps réel; Filtre de Kalman; Electrolytic capacitors; Lead acid batteries; State of charge (SOC); State of health (SOH); Predictive maintenance; Real time identification; Kalman filtering; 620
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Abdennadher, M. K. (2010). Étude et élaboration d’un système de surveillance et de maintenance prédictive pour les condensateurs et les batteries utilisés dans les Alimentations Sans Interruptions (ASI) : Study and elaboration of a monitoring and predictive maintenance system for capacitors and batteries used in Uninterruptible Power Supplies (UPS). (Doctoral Dissertation). Université Claude Bernard – Lyon I. Retrieved from http://www.theses.fr/2010LYO10101
Chicago Manual of Style (16th Edition):
Abdennadher, Mohamed Karim. “Étude et élaboration d’un système de surveillance et de maintenance prédictive pour les condensateurs et les batteries utilisés dans les Alimentations Sans Interruptions (ASI) : Study and elaboration of a monitoring and predictive maintenance system for capacitors and batteries used in Uninterruptible Power Supplies (UPS).” 2010. Doctoral Dissertation, Université Claude Bernard – Lyon I. Accessed March 05, 2021.
http://www.theses.fr/2010LYO10101.
MLA Handbook (7th Edition):
Abdennadher, Mohamed Karim. “Étude et élaboration d’un système de surveillance et de maintenance prédictive pour les condensateurs et les batteries utilisés dans les Alimentations Sans Interruptions (ASI) : Study and elaboration of a monitoring and predictive maintenance system for capacitors and batteries used in Uninterruptible Power Supplies (UPS).” 2010. Web. 05 Mar 2021.
Vancouver:
Abdennadher MK. Étude et élaboration d’un système de surveillance et de maintenance prédictive pour les condensateurs et les batteries utilisés dans les Alimentations Sans Interruptions (ASI) : Study and elaboration of a monitoring and predictive maintenance system for capacitors and batteries used in Uninterruptible Power Supplies (UPS). [Internet] [Doctoral dissertation]. Université Claude Bernard – Lyon I; 2010. [cited 2021 Mar 05].
Available from: http://www.theses.fr/2010LYO10101.
Council of Science Editors:
Abdennadher MK. Étude et élaboration d’un système de surveillance et de maintenance prédictive pour les condensateurs et les batteries utilisés dans les Alimentations Sans Interruptions (ASI) : Study and elaboration of a monitoring and predictive maintenance system for capacitors and batteries used in Uninterruptible Power Supplies (UPS). [Doctoral Dissertation]. Université Claude Bernard – Lyon I; 2010. Available from: http://www.theses.fr/2010LYO10101

NSYSU
25.
Tseng, Min-yu.
Coulomb Current Estimation with Open Circuit Voltage Detection and ASIC Realization.
Degree: Master, Electrical Engineering, 2015, NSYSU
URL: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0609115-184000
► Although battery management systems (BMS) have been developed in past decades, they start to attract massive attention till they are widely applied in electric vehicles…
(more)
▼ Although battery management systems (BMS) have been developed in past decades, they start to attract massive attention till they are widely applied in electric vehicles (EVs). Battery packs of EVs are series-parallel combination of many battery modules such that battery management has become a task to beat. In addition, BMS must resist environmental variations to comply with stringent safety requirements. A BMS must at least provide functions of protection, cell balancing and monitoring circuitry. Notably, battery balancing and protection depend on reliable battery parameters such that the status estimation of battery packs is the key to BMS.
This thesis presents a battery monitor unit (BMU) using coulomb counting method with calibrated current estimation approach (CCEA) that avoids the variation of battery capacity at the initialization of different discharging currents. The value of
SOC estimated with CCEA represent the ratio of residual
charge and variation of battery capacity. Moreover, open-circuit voltage (OCV) method is added to the BMU to acquire the initial states from the battery parameters. Specially, OCV buffer mode is added to the BMU such that the BMU doesn't start to estimate
state of the battery by using OCV method until the OCV of the battery is stabilized. The proposed BMU is implemented using TSMC 0.25 μm HVG2 Design Kit, while a battery control unit (BCU) is implemented by DCcduino UNO to receive status of batteries from the BMU.
Advisors/Committee Members: Ko-Chi Kuo (chair), Chua-Chin Wang (committee member), Tong-Yu Hsieh (chair), Po-Ming Lee (chair).
Subjects/Keywords: battery management system; Lithium battery; electric vehicle; state of charge; state of health
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Tseng, M. (2015). Coulomb Current Estimation with Open Circuit Voltage Detection and ASIC Realization. (Thesis). NSYSU. Retrieved from http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0609115-184000
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Tseng, Min-yu. “Coulomb Current Estimation with Open Circuit Voltage Detection and ASIC Realization.” 2015. Thesis, NSYSU. Accessed March 05, 2021.
http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0609115-184000.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Tseng, Min-yu. “Coulomb Current Estimation with Open Circuit Voltage Detection and ASIC Realization.” 2015. Web. 05 Mar 2021.
Vancouver:
Tseng M. Coulomb Current Estimation with Open Circuit Voltage Detection and ASIC Realization. [Internet] [Thesis]. NSYSU; 2015. [cited 2021 Mar 05].
Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0609115-184000.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Tseng M. Coulomb Current Estimation with Open Circuit Voltage Detection and ASIC Realization. [Thesis]. NSYSU; 2015. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0609115-184000
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Michigan
26.
Gong, Xianzhi.
Modeling of Lithium-ion Battery Considering Temperature and Aging Uncertainties.
Degree: PhD, CECS Automotive Systems Engineering, 2016, University of Michigan
URL: http://hdl.handle.net/2027.42/134041
► This dissertation provides a systematic methodology for analyzing and solving the temperature and aging uncertainties in Li-ion battery modeling and states estimation in the electric…
(more)
▼ This dissertation provides a systematic methodology for analyzing and solving the
temperature and aging uncertainties in Li-ion battery modeling and states estimation in
the electric vehicle applications. This topic is motivated by the needs of enhancing the
performance and adaptability of battery management systems. In particular, temperature
and aging are the most crucial factors that influence battery performance, modeling, and
control.
First, the basic theoretical knowledge of Li-ion battery modeling and
State of
Charge
(
SoC) estimation are introduced. The thesis presents an equivalent circuit battery model
based
SoC estimation using Adaptive Extended Kalman Filter (AEKF) algorithm to solve
the initial
SoC problem and provide good estimation result.
Second, the thesis focuses on the understanding of the temperature-dependent
performance of Li-ion battery. The temperature influence is investigated through
Electrochemical Impedance Spectroscopy (EIS) tests to enhance the theoretical basis
understanding and to derive model compensation functions for better model adaptability
at different temperatures.
Third, the battery aging mechanisms are revisited first and then a series of aging
tests are conducted to understand the degradation path of Lithium-ion battery. Moreover,
the incremental capacity analysis (ICA) based
State of Health (SoH) estimation method
xiv
are applied to track battery aging level and develop the bias correction modeling method
for aged battery.
In the final phase, the study of parallel-connected battery packs is presented. The
inconsistency problem due to different battery aging levels and its influence to
parallel-connected packs are discussed. Based on simulation and experimental test results,
it shows that the current difference in parallel connected cells is increased significantly at
low
SoC, despite the battery aging levels and the number of cells in parallel.
In total, this dissertation utilizes physics-based battery modeling and states
estimation method to optimize battery management under temperature and aging
uncertainties in electric vehicle applications. The unique contributions include developing
analytical compensation functions to improve equivalent circuit battery model
adaptability under temperature uncertainty and developing ICA based SoH estimation and
battery modeling method to overcome aging uncertainty.
Advisors/Committee Members: Mi, Chris (advisor), Su, Wengcong (advisor), Murphey, Yi Lu (committee member), Xi, Zhimin (committee member).
Subjects/Keywords: Battery; Modeling; Temperature; State of health; State of charge; Estimation; Automotive Systems Engineering
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Gong, X. (2016). Modeling of Lithium-ion Battery Considering Temperature and Aging Uncertainties. (Doctoral Dissertation). University of Michigan. Retrieved from http://hdl.handle.net/2027.42/134041
Chicago Manual of Style (16th Edition):
Gong, Xianzhi. “Modeling of Lithium-ion Battery Considering Temperature and Aging Uncertainties.” 2016. Doctoral Dissertation, University of Michigan. Accessed March 05, 2021.
http://hdl.handle.net/2027.42/134041.
MLA Handbook (7th Edition):
Gong, Xianzhi. “Modeling of Lithium-ion Battery Considering Temperature and Aging Uncertainties.” 2016. Web. 05 Mar 2021.
Vancouver:
Gong X. Modeling of Lithium-ion Battery Considering Temperature and Aging Uncertainties. [Internet] [Doctoral dissertation]. University of Michigan; 2016. [cited 2021 Mar 05].
Available from: http://hdl.handle.net/2027.42/134041.
Council of Science Editors:
Gong X. Modeling of Lithium-ion Battery Considering Temperature and Aging Uncertainties. [Doctoral Dissertation]. University of Michigan; 2016. Available from: http://hdl.handle.net/2027.42/134041

Penn State University
27.
Sharma, Aabhas.
Combined State of Charge and State of Health Estimation for Lithium-ion Batteries.
Degree: 2012, Penn State University
URL: https://submit-etda.libraries.psu.edu/catalog/15498
► This thesis examines the challenges faced in combined State of Charge(SoC) - State of Health(SoH) estimation for lithium ion (Li-ion) batteries. To monitor battery state…
(more)
▼ This thesis examines the challenges faced in combined
State of
Charge(
SoC) -
State of Health(SoH) estimation for lithium ion (Li-ion) batteries. To monitor battery
state (both long term and short term), it is imperative to analyze the factors affecting the errors in estimation of
SoC and health parameters such as capacity and internal resistance. A brief survey of the literature is done for the
state-of-the-art in battery
state estimation and control with respect to the above stated parameters. Estimation of
SoC, capacity and resistance over an extended period of use is studied using a first order equivalent circuit model to demonstrate the fundamental challenges faced in simultaneous estimation. Identifiability of system parameters pertaining to persistence of excitation (PE) in input signal and flatness of open circuit voltage(OCV) vs.
SoC curve is studied using an Extended Kalman Filter,least squares estimation algorithm and Cramér-Rao bounds. Mathematical derivations supported by simulation studies are done to observe the effect of individual factors including noise levels, PE dither,
SoC ranges, time and initial conditions on estimation error. A trade-off discussion supported by Monte-Carlo simulations is finally presented to explain the influence and importance of each factor pertinent to
SoC-SoH diagnostics, prognostics and control.The results suggest that battery
SoC-SoH parameter identifiability is dependent on: (1) Higher regions of the OCV-
SoC curve which give better capacity estimates (2) PE dither which helps gain accuracy in resistance estimation.
Advisors/Committee Members: Hosam Kadry Fathy, Thesis Advisor/Co-Advisor.
Subjects/Keywords: State of charge; state of health; lithium ion batteries; estimation; engineering; online prediction
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Sharma, A. (2012). Combined State of Charge and State of Health Estimation for Lithium-ion Batteries. (Thesis). Penn State University. Retrieved from https://submit-etda.libraries.psu.edu/catalog/15498
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Sharma, Aabhas. “Combined State of Charge and State of Health Estimation for Lithium-ion Batteries.” 2012. Thesis, Penn State University. Accessed March 05, 2021.
https://submit-etda.libraries.psu.edu/catalog/15498.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Sharma, Aabhas. “Combined State of Charge and State of Health Estimation for Lithium-ion Batteries.” 2012. Web. 05 Mar 2021.
Vancouver:
Sharma A. Combined State of Charge and State of Health Estimation for Lithium-ion Batteries. [Internet] [Thesis]. Penn State University; 2012. [cited 2021 Mar 05].
Available from: https://submit-etda.libraries.psu.edu/catalog/15498.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Sharma A. Combined State of Charge and State of Health Estimation for Lithium-ion Batteries. [Thesis]. Penn State University; 2012. Available from: https://submit-etda.libraries.psu.edu/catalog/15498
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
28.
Savvidis, Charalampos.
Onboard Impedance Diagnostics Method of Li-ion Traction Batteries using Pseudo-Random Binary Sequence.
Degree: Vehicular Systems, 2015, Linköping UniversityLinköping University
URL: http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-118970
► Environmental and economic reasons have lead automotive companies towards the direction of EVs and HEVs. Stricter emission legislations along with the consumer needs for…
(more)
▼ Environmental and economic reasons have lead automotive companies towards the direction of EVs and HEVs. Stricter emission legislations along with the consumer needs for more cost-efficient and environmental friendly vehicles have increased immensely the amount of hybrid and electric vehicles available in the market. It is essential though for Li-ion batteries, the main propulsion force of EVs and HEVs, to be able to read the battery characteristics in a high accuracy manner, predict life expectancy and behaviour and act accordingly. The following thesis constitutes a concept study of a battery diagnostics method. The method is based on the notion of a pseudo-random binary signal used as the current input and from its voltage response, the impedance is used for the estimation of parameters such as the state of charge and more. The feasibility of the PRBS method at a battery cell has been examined through various tests, both in an experimental manner at the lab but also in a simulation manner. The method is compared for validation against the electrochemical impedance spectroscopy method which is being used as a reference. For both the experimental and the simulation examinations, the PRBS method has been validated and proven to work. No matter the change in the parameters of the system, the method behaves in a similar manner as in the reference EIS method. The level of detail in the research and the performed experiments is what makes the significance of the results of high importance. The method in all ways has been proven to work in the concept study and based on the findings, if implemented on an EV’s or HEV’s electric drive line and the same functionality is observed, be used as a diagnostics method of the battery of the vehicle.
Subjects/Keywords: Li-ion batteries; hybrid vehicles; EIS; PRBS; state of charge; state of health; battery diagnostics
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APA ·
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APA (6th Edition):
Savvidis, C. (2015). Onboard Impedance Diagnostics Method of Li-ion Traction Batteries using Pseudo-Random Binary Sequence. (Thesis). Linköping UniversityLinköping University. Retrieved from http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-118970
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Savvidis, Charalampos. “Onboard Impedance Diagnostics Method of Li-ion Traction Batteries using Pseudo-Random Binary Sequence.” 2015. Thesis, Linköping UniversityLinköping University. Accessed March 05, 2021.
http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-118970.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Savvidis, Charalampos. “Onboard Impedance Diagnostics Method of Li-ion Traction Batteries using Pseudo-Random Binary Sequence.” 2015. Web. 05 Mar 2021.
Vancouver:
Savvidis C. Onboard Impedance Diagnostics Method of Li-ion Traction Batteries using Pseudo-Random Binary Sequence. [Internet] [Thesis]. Linköping UniversityLinköping University; 2015. [cited 2021 Mar 05].
Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-118970.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Savvidis C. Onboard Impedance Diagnostics Method of Li-ion Traction Batteries using Pseudo-Random Binary Sequence. [Thesis]. Linköping UniversityLinköping University; 2015. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-118970
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Universidad de Chile
29.
Pola Contreras, Daniel.
An improved prognosis strategy with temperature dependent state-space model for the analysis of the state-of-health and state-for-charge in lithium-ion batteries.
Degree: 2014, Universidad de Chile
URL: http://repositorio.uchile.cl/handle/2250/130476
► Actualmente existe una gran cantidad de equipos y dispositivos que utilizan baterías como su fuente primaria o secundaria de energía. Para estos sistemas es crítico…
(more)
▼ Actualmente existe una gran cantidad de equipos y dispositivos que utilizan baterías como su fuente primaria o secundaria de energía. Para estos sistemas es crítico contar con información del desempeño de sus baterías, dado que este conocimiento puede ayudar a tomar decisiones apropiadas y asegurar autonomía en el tiempo. Dos importantes variables que deben ser monitoreadas son el "Estado-de-Salud" (SOH, del inglés State-of-Health) y el "Estado-de-Carga" (SOC, del inglés State-of-Charge). Este trabajo se enfoca en generar esquemas de pronóstico para ambas variables, donde se tome en cuenta la temperatura de operación.
Con este propósito, se diseñaron y realizaron un conjunto de pruebas de laboratorio con celdas de Ion-Litio donde se caracterizó el impacto de la temperatura en factores tales como la energía entregada en un ciclo, la impedancia interna, o tendencia de degradación. A partir de estos datos, y esquemas existentes en la literatura, se proponen modelos empíricos para la degradación y para la descarga de una batería mediante una representación de espacio-estados, definiendo directamente un estado como el SOH y el SOC respectivamente. Las estimaciones y predicciones a largo plazo se efectúan bajo un enfoque Bayesiano, basado en el filtro de partículas. Además, se propone la implementación de lazos de control externos para corregir condiciones iniciales erróneas de los estados, y un módulo de detección de outliers para trabajar con datos perdidos o inválidos.
La validación de estos esquemas se realiza con datos generados en laboratorio, además de datos de degradación publicados por NASA Ames Prognostic Center of Excellence. El esquema propuesto para el SOH es capaz de incorporar explícitamente el efecto de la temperatura de operación (bajo el concepto de "Capacidad Usable"), y estimar y pronosticar el SOH a una temperatura de referencia. Por otro lado, el esquema para el SOC fue validado incluyendo una mejor representación de la fenomenología del proceso de descarga comparada a la existente, y se deja una propuesta de cómo incluir el efecto de la temperatura en el modelo.
La implementación de estos esquemas de pronóstico permite la incorporación de la temperatura de operación, que a pesar de su gran influencia en el comportamiento de las baterías es considerada constante en muchos casos presentes en la literatura; además de incluir algunas mejoras prácticas en los algoritmos de estimación. Las propuestas de este trabajo dejan las bases para avanzar en la incorporación de otros fenómenos importantes como la profundidad de descarga, o la magnitud de la corriente de descarga.
Subjects/Keywords: Baterías ión-litio; Baterías-Mediciones; State of health; State of charge; SOH
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Record Details
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Pola Contreras, D. (2014). An improved prognosis strategy with temperature dependent state-space model for the analysis of the state-of-health and state-for-charge in lithium-ion batteries. (Thesis). Universidad de Chile. Retrieved from http://repositorio.uchile.cl/handle/2250/130476
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Pola Contreras, Daniel. “An improved prognosis strategy with temperature dependent state-space model for the analysis of the state-of-health and state-for-charge in lithium-ion batteries.” 2014. Thesis, Universidad de Chile. Accessed March 05, 2021.
http://repositorio.uchile.cl/handle/2250/130476.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Pola Contreras, Daniel. “An improved prognosis strategy with temperature dependent state-space model for the analysis of the state-of-health and state-for-charge in lithium-ion batteries.” 2014. Web. 05 Mar 2021.
Vancouver:
Pola Contreras D. An improved prognosis strategy with temperature dependent state-space model for the analysis of the state-of-health and state-for-charge in lithium-ion batteries. [Internet] [Thesis]. Universidad de Chile; 2014. [cited 2021 Mar 05].
Available from: http://repositorio.uchile.cl/handle/2250/130476.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Pola Contreras D. An improved prognosis strategy with temperature dependent state-space model for the analysis of the state-of-health and state-for-charge in lithium-ion batteries. [Thesis]. Universidad de Chile; 2014. Available from: http://repositorio.uchile.cl/handle/2250/130476
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Technology, Sydney
30.
Zhang, Lei.
Modelling and state-of-charge estimation for ultracapacitors in electric vehicles.
Degree: 2016, University of Technology, Sydney
URL: http://hdl.handle.net/10453/62381
► In order to cope with the global challenges like fossil fuel depletion and environmental pollution, electrified vehicles (EVs) have been widely accepted as an enabling…
(more)
▼ In order to cope with the global challenges like fossil fuel depletion and environmental pollution, electrified vehicles (EVs) have been widely accepted as an enabling option for future ground mobility. In comparison to conventional combustion engine vehicles, EVs have the advantage of high efficiency, environment-friendly operation and excellent control flexibility. There is a proviso here that the electricity used by the EV is from a green source such as hydro, wind or solar. The energy storage system (ESS) is a key ingredient of an EV, and significantly affects its driving performance and cost-effectiveness. The exploration of a vehicular ESS poses a formidable challenge, because of high power/energy demands and unpredictable driving environments. Li-ion batteries represent a main choice for this use, but suffer the drawbacks of low power density and poor recyclability. Recently, ultracapacitors (UCs), also referred to as supercapacitors (SCs) or electric double-layer capacitors (EDLCs), have gained increasing attention in the energy storage community, thanks to their high power density, high efficiency, fast charge, wide temperature window and excellent recyclability. These advantages make UCs a good augmentation to high-energy ESSs (e.g., fuel cells, lithium-ion batteries). This combination represents a hybrid energy storage system (HESS) that can fully leverage the synergistic benefits of each constituent device. To ensure efficient, reliable and safe operations of UC systems, numerous challenges including modelling and characterization, and State-of-Charge (SOC) estimation should be effectually surmounted. In order to meet the above mentioned challenges, the main research presented in this dissertation includes:
1. A special test rig for UC characteristic investigation has been established. A test procedure is proposed to collect comprehensive test data. A plethora of tests have been conducted on this test rig including capacity calibration, experimental impedance investigation under different temperatures and SOC values, and dynamic cycling including pulse tests and driving-cycle-based tests under different temperatures, resulting in a wide-ranging UC database.
2. The impedance characteristics of UCs are experimentally investigated under different temperatures and SOC values. The results show that the impedance is highly sensitive to temperature and SOC; and the temperature effect is more significant. In particular, the coupling effect between the temperature and SOC is illustrated, and the high-efficiency SOC window is highlighted.
3. For UC modelling, three commonly used equivalent circuit models are systematically examined in terms of model accuracy, complexity and robustness in the context of EV applications. A genetic algorithm (GA) is employed to extract the optimal model parameters based on the Hybrid Pulse Power Characterization (HPPC) test data. The performance of these models is then evaluated and compared by measuring the model complexity, accuracy, and robustness against “unseen” data collected…
Subjects/Keywords: Environmental pollution.; Electrified vehicles (EVs).; Environment-friendly operation.; Excellent control flexibility.; Energy storage system (ESS).; Li-ion batteries.; Electric double-layer capacitors (EDLCs).; Hybrid energy storage system (HESS).; State-of-Charge (SOC) estimation.; Hybrid Pulse Power Characterization (HPPC) test data.; Dynamic Stress Test (DST) test.; Extended Kalman Filter (EKF).; Federal Urban Driving Schedule (FUDS) test.; Battery state-of-health (SOH) model.; Self-designed pulse (SDP) test.
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Record Details
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Zhang, L. (2016). Modelling and state-of-charge estimation for ultracapacitors in electric vehicles. (Thesis). University of Technology, Sydney. Retrieved from http://hdl.handle.net/10453/62381
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Zhang, Lei. “Modelling and state-of-charge estimation for ultracapacitors in electric vehicles.” 2016. Thesis, University of Technology, Sydney. Accessed March 05, 2021.
http://hdl.handle.net/10453/62381.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Zhang, Lei. “Modelling and state-of-charge estimation for ultracapacitors in electric vehicles.” 2016. Web. 05 Mar 2021.
Vancouver:
Zhang L. Modelling and state-of-charge estimation for ultracapacitors in electric vehicles. [Internet] [Thesis]. University of Technology, Sydney; 2016. [cited 2021 Mar 05].
Available from: http://hdl.handle.net/10453/62381.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Zhang L. Modelling and state-of-charge estimation for ultracapacitors in electric vehicles. [Thesis]. University of Technology, Sydney; 2016. Available from: http://hdl.handle.net/10453/62381
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
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