基于可重构电路的串联电池动态分组主动均衡方法  

Dynamic Grouping Active Equalization Method for Series Connected Batteries Based on Reconfigurable Circuits

作　　者：秦东晨[1] 赵鸿飞 武红霞[1] 杨俊杰[1] 陈江义[1] 王婷婷[1] QIN Dongchen;ZHAO Hongfei;WU Hongxia;YANG Junjie;CHEN Jiangyi;WANG Tingting(School of Mechanical and Power Engineering,Zhengzhou University,Zhengzhou 450001,China)

机构地区：[1]郑州大学机械与动力工程学院,河南郑州450001

出　　处：《郑州大学学报(工学版)》2025年第2期90-96,110,共8页Journal of Zhengzhou University(Engineering Science)

基　　金：国家重点研发项目(2018YFB0106204-03);河南省重大科技专项(221100240200)。

摘　　要：针对电池组中单体电池电量不一致问题,以串联电池组为研究对象,对电池主动均衡控制技术进行研究,研究内容包括均衡拓扑的改进和均衡控制策略的设计。首先,提出了一种新型均衡拓扑结构并对其进行验证;其次,建立均衡电路的数学模型,分析均衡过程中电压差和开关频率对均衡性能的影响,并根据电压差分析结果设计了基于可变占空比的多对多均衡控制策略,以提高电池组均衡速度和均衡一致性;最后,在MATLABR2021b/Simulink中进行均衡拓扑与均衡算法的联合仿真。结果表明:与固定分组均衡控制策略相比,所提均衡拓扑和控制策略能够提高电池组均衡速度和均衡一致性,均衡时间减少了29.71%,电池荷电状态(SOC)方差降低了16.13%,均衡过程中能量转移次数减少了52.5%。In order to solve the problem of inconsistent state of charge of single cells in battery pack,the active equalization control technology was studied with series connected 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 was proposed and verified.Secondly,the mathematical model of equalization circuit was established,and the effects of voltage difference and switching frequency on equalization performance were 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 was carried out in MATLABR2021b/Simulink.The results showed that,compared with the fixed group balancing control strategy,the proposed balancing topology and control strategy could improve the balancing speed and consistency of the battery pack,the time efficiency was increased by 29.71%,the battery SOC variance was reduced by 16.13%and the number of energy transfers was reduced by 52.5%.

关 键 词：锂离子电池 主动均衡 可重构电路 动态分组 均衡拓朴 

分 类 号：TM912[电气工程—电力电子与电力传动]