动力锂电池变电阻均衡充电方法研究  

Research on Variable Resistance Equalizing Charge method of Power Lithium-ion Battery

作　　者：徐磊[1] 何秋生[1] 孙志毅[1] 李晓云[1] 

机构地区：[1]太原科技大学电子信息工程学院,太原030024

出　　处：《太原科技大学学报》2014年第2期105-109,共5页Journal of Taiyuan University of Science and Technology

基　　金：山西省高校科技开发项目(20121068);太原科技大学同洲电子科技创新基金(TZ201313);太原科技大学大学生创新性实验项目(XJ2013008)

摘　　要：针对动力锂电池组中单体电池之间电压不一致性,提出一种变电阻均衡充电方法。在分析了单体电池间电压不一致性的原因、设计数字可变电阻器和可变电阻仿真模型的基础上,采用Matlab/Simulink软件对可变电阻均衡充电进行仿真,根据电池端电压大小调节均衡电阻值。结果表明变电阻均衡控制可使电压误差控制在0.3 mV以内,有效的减小单体电池之间的不一致性、延长电池的使用寿命。To solve the inconsistency of voltage between individual battery cells of electric car lithium-ion battery pack,a new variable resistance equalizing charge method is put forward in this paper. Firstly,the cause of the in-consistency voltage of inter-cell is analyzed;digital variable resistance and simulation model of variable resistor are designed. Secondly,lithium battery model and variable resistance module are designed. Finally, the equalization charge simulation is finished in Matlab/Simulink software. The value of equalization resistance is set according to the battery terminal voltage. The result shows that the voltage error between individual battery cells could be limited to less than 0. 3 mV,and the method may reduce effectively the inconsistency between individual battery cells and prolongs battery life.

关 键 词：均衡控制 可变电阻器 锂电池组 串联充电 

分 类 号：TM912[电气工程—电力电子与电力传动]