摘要
介绍了一种动力电池组的三端口双向均衡电路。该电路采用具有中心抽头绕组的电磁元作件为能量传递元件,实现3个电池串联构成的电池组间任意两个单体的直接双向能量传递。分析了各种不均衡情况下开关管开关状态和相应的电路工作模态,重点描述了采用漏感作为输出滤波电感的正激工作模态电流波形。仿真和实验结果表明,该电路能够实现电池单体间高效、快速的电压均衡,可有效避免电池单体过充和过放。该电路易于实现模块化,适用于采用数量较多单体串联的动力电池组作为能源的电动汽车领域。
A three-port bidirectional circuit for power battery strings is proposed.It utilizes electromagnetic element with center tapped winding as the energy transfer element to achieve direct energy transfer between arbitrary two cells of three- cell battery module.Switch mode and corresponding circuit work mode at uneqnalization are analyzed.Current waveform of forward work mode when the leakage inductor is used as output filter inductor is described.Simulation and experiment show that high energy transmission efficiency and rapid voltage equalization are achieved,and the battery overcharge or over discharge can be avoided.The structure can be used to achieve modularization and is adapted to EV which uses several batterys as power battery strings.
出处
《电力电子技术》
CSCD
北大核心
2009年第8期56-58,共3页
Power Electronics
基金
台达环境与教育基金会<电力电子科教发展计划>的资助(DREG2008014)~~
