电源学报2024，Vol.22Issue(2)：216-223,8.DOI:10.13234/j.issn.2095-2805.2024.2.216
基于SOC的串联连接锂电池能量均衡控制研究
Energy Balance Control of Series-connected Lithium Batteries Based on SOC
摘要
Abstract
The state-of-charge(SOC)balance control of series-connected lithium batteries is of significance to the im-provement of battery life.In this paper,a hybrid SOC equalization scheme based on active-passive equalization is proposed against the SOC discreteness of a lithium battery cell,in which the topology of the active equalizer is realized by a multi-winding flyback converter,and the passive equalizer consists of a resistor and a switch connected in parallel at both ends of the cell.The operating principle for the hybrid SOC equalizer is analyzed in detail,and the effect of SOC discreteness on e-qualization speed is discussed in terms of control strategy.The standard deviation representing the degree of discreteness and the coefficient representing the reasons of discreteness are introduced to realize the fast equalization of SOC under dif-ferent discrete conditions.The topology of the proposed hybrid equalizer and the corresponding control scheme can optimize energy consumption and balancing speed,and experimental results verify the feasibility of theoretical analysis.关键词
锂电池/能量均衡/SOC离散性/主动均衡Key words
Lithium battery/energy balance/state-of-charge(SOC)discreteness/active equalization分类
信息技术与安全科学引用本文复制引用
马春艳,王庆龙,张迪,张纯江..基于SOC的串联连接锂电池能量均衡控制研究[J].电源学报,2024,22(2):216-223,8.基金项目
国家自然科学基金资助项目(51877187)This work is supported by National Natural Science Foundation of China under the grant 51877187 （51877187）
