一种开关管复用的电感型串联锂电池均衡电路  

Inductive equalizer for series-connected lithium batteries based on reutilizing switches

作　　者：康龙云[1] 万蕾 谢缔 徐鹏[1] KANG Long-yun;WAN Lei;XIE Di;XU Peng(College of Electric Power,South China University of Technology,Guangzhou 510640,China;Guangdong Hynn Technology Co.,Ltd.,Dongguan 518109,China)

机构地区：[1]华南理工大学电力学院,广东广州510640 [2]广东恒翼能科技有限公司,广东东莞518109

出　　处：《电机与控制学报》2023年第1期46-54,共9页Electric Machines and Control

基　　金：广东省重点领域研发计划项目(2019B090911001)。

摘　　要：现有电感型电池均衡电路存在控制复杂、二极管导通损耗大的问题,提出一种开关管复用的电感型串联锂电池组均衡电路,均衡电路中分别只有一个电池选通开关与每个电池端口相连。研究均衡回路中二极管数目对均衡速度和均衡效率的影响,对均衡过程进行建模分析,得出每个模态回路中最佳的二极管数目。根据理论分析结论和电路拓扑特征,均衡电路采取奇偶交错均衡策略和开关管复用为二极管的开关导通策略,使用较少的开关实现能量在任意两节编号奇偶不同的单体电池间传输的同时,减少均衡回路中的二极管数目,提高了均衡速度和均衡效率。最后搭建四节电池的均衡实验平台,并就开关导通方式的不同进行两组实验,结果表明所提电池组均衡电路和开关导通策略可有效地实现对串联锂电池组的均衡,且提升了均衡速度和效率。In view of the problems of complex control and large diode conduction losses in existing inductive active equalizers, an inductive equalizer for lithium batteries based on reutilizing switches was proposed, in which there is only one switch connecting to every battery port respectively. In order to study how the diodes’ quantity in a balancing loop affects the balance speed and efficiency, a modeling analysis was conducted to obtain the optimal diodes’ quantity in the loop of every mode. According to the analytical conclusion and the circuit topology, the equalizer adopting the parity interleaved equalization strategy and the proposed switch on-off strategy was reused as diodes. With fewer switches, energy can be transmitted between any two cells with opposite parity, and the number of diodes in the equalization loop can be reduced, improving equalization speed and efficiency. Further, two four-battery equalization experiments were carried out on different switching conducting modes. The experimental results show that the proposed equalizer and the switch on-off strategy can effectively realize equalization for series-connected lithium batteries, improving the equalization speed and efficiency.

关 键 词：电池组 电池均衡技术 主动均衡电路 电感 开关管复用 均衡策略 

分 类 号：TM91[电气工程—电力电子与电力传动]