串联锂离子电池组能量均衡策略的研究  

Research on Energy Equilibrium of Li-ion Battery Series

作　　者：沈艳霞[1] 周园[1] 

机构地区：[1]江南大学电气自动化研究所,江苏无锡214122

出　　处：《控制工程》2013年第4期773-777,共5页Control Engineering of China

基　　金：国家自然科学基金(61104183);教育部新世纪优秀人才支持计划(NCET-10-0437)

摘　　要：电动汽车中串联锂离子电池组使用时出现的严重能量不均衡问题极大地缩短了电池的使用寿命。提出一种新型的双向能量均衡策略,主电路由Buck-boost和Boost电路组成,控制单元采用单周期控制技术。详细分析了电路实现能量均衡的工作原理,设计了相应的单周期控制器和选择方法,并对均衡功率和均衡效率进行分析计算。实验结果表明,该方法结构简单,有效实现了能量从高能单体向低能单体快速双向传递,解决了串联锂离子电池组能量不均衡问题。Li-ion battery series in electric vehicles appears serious energy non-equilibrium problems during operation, which greatly shorten the life of the battery. Therefore, a new kind of two-way energy equilibrium strategy is proposed in this paper. The main circuit of this equilibrium strategy is made of Buck-boost convertor and boost convertor, and control units are based on one cycle control tech- nology. Working principle of this energy equilibrium and equilibrium power and efficiency are analyzed, also the one-cycle controller is designed-in detail. Some key parameters are calculated respectively. The results show by using the proposed structure, the size of the system is reduced, and the two-way transfer from high-energy cell to low-energy cell can be realized rapidly, which solves the li-ion bat- tery series energy non-equilibrium problems effectively.

关 键 词：锂离子电池组 能量均衡 单周期控制 BUCK-BOOST变换器 

分 类 号：TP27[自动化与计算机技术—检测技术与自动化装置]