Research on Dynamic Grouping Active Equalization of Series Batteries Based on Reconfigurable Circuits
[1]QIN Dongchen,ZHAO Hongfei,WU Hongxia,et al.Research on Dynamic Grouping Active Equalization of Series Batteries Based on Reconfigurable Circuits[J].Journal of Zhengzhou University (Engineering Science),2024,45(pre):2-.[doi:10.13705/j.issn.1671-6833.2024.05.003]
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Journal of Zhengzhou University (Engineering Science)[ISSN
1671-6833/CN
41-1339/T] Volume:
45
Number of periods:
2024 pre
Page number:
2-
Column:
Public date:
2024-11-30
- Title:
- Research on Dynamic Grouping Active Equalization of Series Batteries Based on Reconfigurable Circuits
- Keywords:
- lithium-ion battery; active equalization; reconfigurable circuits; dynamic grouping; multi-cell-to-multi-cell
- CLC:
- TM912
- DOI:
- 10.13705/j.issn.1671-6833.2024.05.003
- Abstract:
- In order to solve the problem of inconsistent state of charge (SOC)of single cells in battery pack, the active equalization control technology is studied with series battery pack as the research object. The research content included the improvement of the balancing topology and the design of the balancing control strategy. Firstly, a new topology is proposed and verified. Secondly, the mathematical model of equalization circuit is established, and the effects of voltage difference and switching frequency on equalization performance are analyzed. According to the results of voltage difference analysis, a multi-cell-to-multi-cell balancing control strategy based on variable duty cycle is designed to improve the equalization speed and consistency of battery pack. Finally, the joint simulation of equalization topology and equalization strategy is carried out in MATLAB/Simulink. The results show that, compared with the fixed group balancing control strategy, the proposed balancing topology and control strategy can improve the balancing speed and consistency of the battery pack, the time efficiency is increased by 29.71%, the battery SOC variance is reduced by 16.13% and the number of energy transfers is reduced by 52.5%
- References:
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Last Update:
2024-10-24