基于多绕组变压器与倍压整流器级联的电池均衡充电器研究  

Research on Equalizing Charger Based on Multi-winding Transformer and Cascaded Double-voltage Rectifiers

作　　者：吴冬春[1] 朱飞 唐佳维 WU Dongchun;ZHU Fei;TANG Jiawei(School of Electrical Engineering,Yancheng Institute of Technology,Yancheng 224051,China)

机构地区：[1]盐城工学院电气工程学院,盐城224051

出　　处：《电源学报》2024年第6期244-252,共9页Journal of Power Supply

基　　金：国家自然科学基金资助项目(51577164);江苏省“青蓝工程”中青年学术带头人培养对象资助项目;江苏省第五期“333工程”资助项目。

摘　　要：储能电池由数量庞大的低压电池单元构成,由于单元特性差异导致各电池单元的荷电状态存在差异,使得部分单元在充电过程中出现过充现象。基于此,提出1种基于多绕组变压器+倍压整流器的电池均衡充电器,并与集中无源均衡充电器的特性进行了比较。对所提均衡充电器的工作原理进行分析,得到其等效电路,并对其缓冲电感与变压器的匝比设计进行了优化。同时,提出单电压环的控制策略,实现了恒流、恒压两阶段充电,并分析了单元间电压差异大小对变压器工作的影响。仿真结果表明,所提充电器可有效实现电池单元的充电与均衡功能的统一。The energy storage battery pack consists of a large number of low-voltage battery cells.The states-of-charge(SOC)of cells are different due to the difference in their characteristics,which causes some cells to be over-discharged during the charging process.To avoid this phenomenon,a equalizing charger based on multi-winding transformer and cascaded double-voltage rectifiers is proposed,and its characteristics are compared with those of a centralized passive equalizing charger.Its operation principle is analyzed,and its equivalent circuit is obtained.The buffer inductance of the novel equalizing charger and the turn ratio of the transformer are also optimized.A control strategy of single voltage-loop is put forward,which can guarantee the charging at two stages,i.e.,constant-current and constant-voltage.In addition,the influence of the voltage difference between cells on the transformer operation is analyzed.Simulation results show that the proposed charger can achieve a high charging efficiency while satisfying the requirement of voltage equalization between cells.

关 键 词：充电器 均衡器 倍压整流级联 恒流恒压充电 等效电路 

分 类 号：TM46[电气工程—电器]