电源技术2012，Vol.36Issue(4)：479-482,4.
纯电动汽车动力锂电池均衡充电的研究
Charge equalization of Li-ion battery for electric vehicles
摘要
Abstract
The unbalance of Li-ion cells in the same battery pack may limit the life of batter and the operating range of once charge, so the charge equalization converter was designed. The dispersion curve of voltage was obtained by testing battery, which was made up 16 cells. The necessity of charge equalization was analyzed particularly. According to electrical properties of Li-ion cells, the unbalance of a battery was discussed, and a mathematical model was established. Two concepts were presented: relative concentration of single battery for SOC (State of Charge), and pseudo-equilibrium for battery. The high-frequency transformer adopted flyback converter and start and end of charge equalization was controlled by software. The accuracy of A/D sample was improved by two point method of calibration. Finally, the result of simulation and experiment show that constant voltage and current control is achieved and the dispersion is decreased by 61.86%.关键词
纯电动汽车/锂电池/均衡/充电/反激变换器/不均衡度/伪均衡/恒压控制/恒流控制Key words
electric vehicles/ Li-ion battery/ equalization/ charge/ flyback converter/ degree of disequilibrium/ pseudo-equilibrium/ constant voltage control/ constant current control分类
信息技术与安全科学引用本文复制引用
郭军,刘和平,徐伟,刘平..纯电动汽车动力锂电池均衡充电的研究[J].电源技术,2012,36(4):479-482,4.基金项目
中央高校基本科研业务费资助项目(CDJXS11151156) （CDJXS11151156）
