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:
2024-12-31
- Title:
- Research on Dynamic Grouping Active Equalization of Series Batteries Based on Reconfigurable Circuits
- Keywords:
- Lithium ion batteries; Active equilibrium; Reconfigurable circuit; Dynamic grouping; Many to many balance
- CLC:
- -
- DOI:
- 10.13705/j.issn.1671-6833.2024.05.003
- Abstract:
- In order to solve the problem of inconsistent capacity of single battery in battery pack, the active equalization control technology of battery pack in series was studied, including the improvement of equalization topology and the design of equalization control strategy. Firstly, a new balanced topology is proposed and verified. Secondly, the mathematical model of the equalization circuit is established, and the effects of voltage difference and switching frequency on the equalization performance are analyzed. According to the results of voltage difference analysis, a many-to-many equalization control strategy based on variable duty cycle is designed to improve the equalization speed and equalization consistency. Finally, in MATLAB\ / Simulink, the equilibrium topology and the algorithm of co-simulation. The results show that compared with the fixed packet equalization control strategy, the proposed equalization topology and control strategy can improve the equalization speed and equalization consistency of the battery pack. The equalization time is reduced by 29.71%, the SOC variance of the charged state of the battery is reduced by 16.13%, and the number of energy transfers during the equalization process is reduced by 52.5%.
- References:
- -
- Similar References:
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Last Update:
2024-05-27