应用于动力电池组的积木式结构均衡控制方案  

Modular Equalization Control Scheme of Power Battery Packs

作　　者：赵奕凡[1] 颜伏伍[1] 杜常清[1] 吴友宇[1] 李铮[2] 骆元[2] 

机构地区：[1]武汉理工大学现代汽车零部件技术湖北省重点实验室,湖北武汉430070 [2]东风汽车公司技术中心,湖北武汉430056

出　　处：《华南理工大学学报（自然科学版）》2012年第12期86-91,127,共7页Journal of South China University of Technology(Natural Science Edition)

基　　金：国家"863"计划项目(2011AA11A225);中国博士后科学基金资助项目(20110491226)

摘　　要：探讨了单体失衡现象对动力电池组性能的不良影响,分析了常见的均衡策略及其相应的电路结构,提出了积木式结构动力电池组均衡控制方案,结合电池单体端电压与荷电状态之间的对应关系,通过监控单体端电压状态,并根据相邻单体的电压差异做出均衡控制策略的决策判断.针对耗散型均衡及非耗散型均衡两种方案设计了对应的均衡模块,来对磷酸铁锂电池组进行充电、放电两种模式的均衡实验.结果表明,文中方案可对任意节单体组成的动力电池组进行有效的均衡管理.In this paper, first, the impacts of imbalanced battery cell on the performance of power battery packs are discussed, and several equalization schemes and the corresponding control circuits are analyzed. Then, an equalization control scheme of the power battery packs in modular structure is proposed, which determines the equalization control strategy according to the voltage difference of adjacent battery cells by considering the relationship between the terminal voltage and the state of charge of the battery cell and by monitoring the terminal voltage in real time. Moreover, two equalizers respectively corresponding to the dissipation and the non-dissipation equilibriums are designed to conduct the charging and discharging equalization experiments on LiFePO4 battery pack. The results show that the proposed scheme achieves effective equalization control of power battery packs consisting of random battery units.

关 键 词：动力电池组 积木式结构 均衡控制 耗散均衡 非耗散均衡 

分 类 号：U270.7[机械工程—车辆工程]