非对称Buck-Boost电路及锂电池组主动均衡策略研究  

Research on asymmetric Buck-Boost circuit and active equalization control of lithium battery pack

作　　者：李善寿[1] 钱龙 叶伟 黄梅初 谢陈磊[1] LI Shanshou;QIAN Long;YE Wei;HUANG Meichu;XIE Chenlei(Anhui Provincial Key Laboratory of Intelligent Building and Building Energy Efficiency,Anhui Jianzhu University,Hefei Anhui 230022,China;Anhui Nanrui Jiyuan Power Grid Technology Co.,Ltd.,Hefei Anhui 230088,China)

机构地区：[1]安徽建筑大学安徽省智能建筑与建筑节能重点实验室,安徽合肥230022 [2]安徽南瑞继远电网技术有限公司,安徽合肥230088

出　　处：《电源技术》2025年第4期814-823,共10页Chinese Journal of Power Sources

基　　金：国家重点研发项目(2023YFC3807704);安徽省高校科研计划项目(2022AH010018)。

摘　　要：针对当前均衡电路拓扑和控制策略存在均衡速度慢、均衡路径单一等问题,提出一种基于非对称Buck-Boost电路电池组均衡控制电路拓扑,分析了非对称Buck-Boost电路实现单体-单体和多体-非对称多体均衡控制原理。以锂电池荷电状态(SOC)为均衡变量,构建电池组状态空间模型,利用二次规划算法滚动优化均衡电流。通过调节开关管占空比控制实现锂电池组SOC均衡。在MATLAB/Simulink仿真平台下搭建了非对称Buck-Boost电路及主动均衡控制策略模型。针对马里兰大学公开锂电池充放电实验数据集进行仿真验证,结果表明,非对称Buck-Boost电路均衡拓扑和主动均衡控制策略模型可以快速实现锂电池组SOC均衡,与传统的拓扑和控制策略相比,均衡时间缩短30.9%以上。In view of the problems such as slow equalization speed and single equalization path existing in the current equalization circuit topologies and control strategies,a battery pack equalization control circuit topology based on the asymmetric Buck-Boost circuit was proposed.The principles of implementing single-single and multi-asymmetric multi-cell equalization control by the asymmetric Buck-Boost circuit were analyzed.Subsequently,taking the state of charge(SOC)of lithium-ion batteries as the equalization variable,a state-space model of the battery pack was constructed,and the quadratic programming algorithm was used to iteratively optimize the equalization current.Finally,the SOC equalization of the lithium-ion battery pack was achieved by adjusting the duty cycle of the switching transistors.The model of the asymmetric Buck-Boost circuit and the active equalization control strategy was built on the MATLAB/Simulink simulation platform.The simulation verification was carried out for the publicly available lithium-ion battery charge-discharge experimental dataset of the University of Maryland.The results show that the equalization topology of the asymmetric Buck-Boost circuit and the active equalization control strategy model can quickly achieve the SOC equalization of the lithium-ion battery pack.Compared with the traditional topologies and control strategies,the equalization time is shortened by more than 30.9%.

关 键 词：锂电池组 非对称Buck-Boost电路 SOC均衡 模型预测控制 

分 类 号：TM912.9[电气工程—电力电子与电力传动]