A novel hybrid equivalent circuit model for lithium-ion battery considering nonlinear capacity effects

A novel hybrid equivalent circuit model for lithium-ion battery considering nonlinear capacity effects

In this paper, a novel hybrid equivalent circuit model for lithium-ion battery. The proposed equivalent circuit model of lithium-ion battery is based on Thevenin equivalent circuit model, and a state-of-charge (SOC) part is added into the model to improve the model performance. In the proposed model...

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Main Authors: Dongdong Chen, Long Xiao, Wenduan Yan, Yinbiao Guo
Format: Article
Language:English
Published: Elsevier 2021-09-01
Series:Energy Reports
Subjects:
State of charge (SOC)
Rated capacity effect
Recovery effect
Equivalent circuit model
Available/ unavailable capacity
Online Access:http://www.sciencedirect.com/science/article/pii/S2352484721003930
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record_format Article
spelling doaj-2615c787c45c44669a15ad10e1ff970f2021-09-29T04:25:47ZengElsevierEnergy Reports2352-48472021-09-017320329A novel hybrid equivalent circuit model for lithium-ion battery considering nonlinear capacity effectsDongdong Chen0Long Xiao1Wenduan Yan2Yinbiao Guo3School of Electronic and Electrical Engineering, Minnan University of Science and Technology, Quanzhou 362700, China; State Key Laboratory of Synthetical Automation for Process Industries, Northeast University, Shenyang 110000, China; Corresponding author at: School of Electronic and Electrical Engineering, Minnan University of Science and Technology, Quanzhou 362700, China.School of Electronic and Electrical Engineering, Minnan University of Science and Technology, Quanzhou 362700, China; State Key Laboratory of Synthetical Automation for Process Industries, Northeast University, Shenyang 110000, ChinaSchool of Electronic and Electrical Engineering, Minnan University of Science and Technology, Quanzhou 362700, ChinaSchool of Electronic and Electrical Engineering, Minnan University of Science and Technology, Quanzhou 362700, ChinaIn this paper, a novel hybrid equivalent circuit model for lithium-ion battery. The proposed equivalent circuit model of lithium-ion battery is based on Thevenin equivalent circuit model, and a state-of-charge (SOC) part is added into the model to improve the model performance. In the proposed model, the battery capacity is divided into available capacity and unavailable capacity, which can well reflect the rated capacity effect when the battery is working, the recovery effect when the battery is not working and the self-discharge effect at all times. At the same time, a new definition of the SOC is given. The SOC value of the battery is estimated in real time through the model of the charged state part, and the one-to-one correspondence between SOC and open circuit voltage is established. Besides, the second-order polarized RC network in Thevenin model is improved to the third-order RC network, and the third-order RC network is endowed with practical physical significance, to reflect the polarization effect of the battery more accurately. Finally, Simulink simulation and experimental results have verified the correctness of the proposed model.http://www.sciencedirect.com/science/article/pii/S2352484721003930State of charge (SOC)Rated capacity effectRecovery effectEquivalent circuit modelAvailable/ unavailable capacity
collection DOAJ
language English
format Article
sources DOAJ
author Dongdong Chen
Long Xiao
Wenduan Yan
Yinbiao Guo
spellingShingle Dongdong Chen
Long Xiao
Wenduan Yan
Yinbiao Guo
A novel hybrid equivalent circuit model for lithium-ion battery considering nonlinear capacity effects
Energy Reports
State of charge (SOC)
Rated capacity effect
Recovery effect
Equivalent circuit model
Available/ unavailable capacity
author_facet Dongdong Chen
Long Xiao
Wenduan Yan
Yinbiao Guo
author_sort Dongdong Chen
title A novel hybrid equivalent circuit model for lithium-ion battery considering nonlinear capacity effects
title_short A novel hybrid equivalent circuit model for lithium-ion battery considering nonlinear capacity effects
title_full A novel hybrid equivalent circuit model for lithium-ion battery considering nonlinear capacity effects
title_fullStr A novel hybrid equivalent circuit model for lithium-ion battery considering nonlinear capacity effects
title_full_unstemmed A novel hybrid equivalent circuit model for lithium-ion battery considering nonlinear capacity effects
title_sort novel hybrid equivalent circuit model for lithium-ion battery considering nonlinear capacity effects
publisher Elsevier
series Energy Reports
issn 2352-4847
publishDate 2021-09-01
description In this paper, a novel hybrid equivalent circuit model for lithium-ion battery. The proposed equivalent circuit model of lithium-ion battery is based on Thevenin equivalent circuit model, and a state-of-charge (SOC) part is added into the model to improve the model performance. In the proposed model, the battery capacity is divided into available capacity and unavailable capacity, which can well reflect the rated capacity effect when the battery is working, the recovery effect when the battery is not working and the self-discharge effect at all times. At the same time, a new definition of the SOC is given. The SOC value of the battery is estimated in real time through the model of the charged state part, and the one-to-one correspondence between SOC and open circuit voltage is established. Besides, the second-order polarized RC network in Thevenin model is improved to the third-order RC network, and the third-order RC network is endowed with practical physical significance, to reflect the polarization effect of the battery more accurately. Finally, Simulink simulation and experimental results have verified the correctness of the proposed model.
topic State of charge (SOC)
Rated capacity effect
Recovery effect
Equivalent circuit model
Available/ unavailable capacity
url http://www.sciencedirect.com/science/article/pii/S2352484721003930
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