Life cycle optimal charging strategy based on the SOH of power lithium ion battery

Authors

Xiangyang XIA, School of Electrical & Information Engineering,Changsha University of Science & Technology,Changsha 410114 ,China
Zihao DENG, School of Electrical & Information Engineering,Changsha University of Science & Technology,Changsha 410114 ,China
Jiacheng ZHANG, School of Electrical & Information Engineering,Changsha University of Science & Technology,Changsha 410114 ,China
Ran TAO, Changsha Xianghang Transportation New Energy Co.,Ltd.,Changsha 410116 ,China
Weiqian ZHANG, Changsha Xianghang Transportation New Energy Co.,Ltd.,Changsha 410116 ,China
Jing ZHANG, School of Electrical & Information Engineering,Changsha University of Science & Technology,Changsha 410114 ,China
Xinyuan TENG, School of Electrical & Information Engineering,Changsha University of Science & Technology,Changsha 410114 ,China
Hanqin ZHU, School of Electrical & Information Engineering,Changsha University of Science & Technology,Changsha 410114 ,China
Zhiyu FU, School of Electrical & Information Engineering,Changsha University of Science & Technology,Changsha 410114 ,China
Xiuqi YI, School of Electrical & Information Engineering,Changsha University of Science & Technology,Changsha 410114 ,China

Keywords

electric vehicle, lithium-ion battery, SOH, database dynamic programming, charging strategy

Abstract

In the view of the battery serious aging caused by the constant-current-constant-voltage(CC-CV) charging strategy which adopts the empirical charging current values, this paper proposes an improved CC-CV charging strategy. Firstly, with the goal of minimum decline capacity of battery, the database dynamic programming (DDP) is employed for the planning of the battery life cycle on the basis of the capacity decline model of lithium-ion battery. After that, the corresponding optimal charging current distribution under different cycle stages is obtained, and the influence of the charging current on the battery capacity decay is also analyzed. Finally, in MATLAB/Simulink simulation, the proposed strategy is compared with the existing CC-CV charging strategy. It is shown that this strategy can effectively extend the battery cycle life.

DOI

10.19781/j.issn.1673-9140.2022.06.002

First Page

17

Last Page

24

Recommended Citation

XIA, Xiangyang; DENG, Zihao; ZHANG, Jiacheng; TAO, Ran; ZHANG, Weiqian; ZHANG, Jing; TENG, Xinyuan; ZHU, Hanqin; FU, Zhiyu; and YI, Xiuqi (2023) "Life cycle optimal charging strategy based on the SOH of power lithium ion battery," Journal of Electric Power Science and Technology: Vol. 37: Iss. 6, Article 2.
DOI: 10.19781/j.issn.1673-9140.2022.06.002
Available at: https://jepst.researchcommons.org/journal/vol37/iss6/2