摘要
储能电池由数量庞大的低压电池单元构成,由于单元特性差异会导致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。为此提出了一种基于导抗网络的带有均压功能的充电器,提出了单电压环的控制策略,实现了恒流恒压两阶段充电;分析了均压器实现电池均压的原理,给出了均压器的等效电路;分析了单元间电压差异大小对均压器起始工作电压的影响,并给出了所提完整拓扑的等效电路。实验结果表明,所提充电器实现了高效率与电池单元均压功能的统一。
Energy storage batteries are currently composed of a large number of low-voltage battery cells. The states of charge of the cells are different due to the characteristic diacrepancy between the cells, which causes some cells to be overcharged. A charger with voltage equalization function based on an immittance network is proposed in this paper. This charger can implements the two-stage charging mode of constant current and constant voltage with only a single voltage loop. The principle of the equalizer is analyzed. The influence of the voltage difference between the cells on the initial working voltage of the equalizer is presented and the equivalent circuit of the proposed complete topology is also given. The experimental results show that the proposed charger simultaneously achieves the high efficiency and the requirement of voltage equalization between the cells.
作者
吴冬春
王琰
李郑斐
阚加荣
许津铭
汤雨
谢少军
WU Dongchun;WANG Yan;LI Zhengfei;KAN Jiarong;XU Jinming;TANG Yu;XIE Shaojun(College of Electrical Engineering,Yancheng Institute of Technology,Yancheng 224051,Jiangsu Province,China;Spic Jiangsu New Energy Co.,Ltd.,Nanjing 211100,Jiangsu Province,China;College of Automation Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing 211106,Jiangsu Province,China)
出处
《电网技术》
EI
CSCD
北大核心
2021年第9期3714-3721,共8页
Power System Technology
基金
国家自然科学基金项目(51577164,51677084)。
关键词
充电器
导抗网络
均压器
恒流恒压充电
charger
immittance network
equalizer
constant voltage and constant current charging
