基于双向Cuk变换器的电动汽车锂电池组均衡研究  

Research on Equalization of Lithium Battery Pack for Electric Vehicle Based on Bidirectional Cuk Converter

作　　者：唐佳维 吴冬春[1] 朱飞 顾伟伟[1] 冯彦博 

机构地区：[1]盐城工学院电气工程学院,江苏 盐城 [2]河海大学机电工程学院,江苏 常州

出　　处：《建模与仿真》2023年第3期2411-2420,共10页Modeling and Simulation

摘　　要：现今锂电池是新能源汽车主要动力来源,但串联的锂电池组在使用过程中因为单体电池的不一致性,这种问题会导致电池的寿命和安全性降低。针对此问题,提出了一种将双向Cuk变换器和反激式变换器组合起来的动力电池组分组式均衡方案。本均衡方案分为组内均衡以及组间均衡,组内均衡是由双向Cuk电路来实现的,可以使相邻锂电池间快速均衡;而组间均衡是由单向反激式电路实现的,可使串联锂电池组给任意电量低的电池模块进行充电均衡。在Matlab/Simulink搭建仿真模型,通过仿真结果对比可以发现此分组式均衡方案不仅可以实现串联锂电池组的均衡,而且均衡速度更快,均衡效率良好。Nowadays lithium battery is the main power source of new energy vehicles, but the series lithium battery pack will reduce the life and safety of the battery due to the inconsistency of the single bat-tery during use. To solve this problem, a power battery pack grouping equalization scheme com-bining bidirectional Cuk converter and flyback converter is proposed. The equalization scheme is divided into intra-group equalization and inter-group equalization. The intra-group equalization is realized by bidirectional Cuk circuit, which can make the rapid equalization between adjacent lith-ium batteries. The intergroup equalization is realized by one-way flyback circuit, which can make the serial lithium battery pack charge equalization to any battery module with low power. The sim-ulation model was set up in Matlab/Simulink. By comparing the simulation results, it can be found that this grouping equalization scheme can not only realize the equalization of series lithium bat-tery pack, but also achieve faster equalization speed and good equalization efficiency.

关 键 词：CUK变换器 锂电池组 均衡效率 反激式变换器 单体电池 均衡速度 电池模块 反激式电路 

分 类 号：TM9[电气工程—电力电子与电力传动]