摘要
针对电动汽车锂电池组中的电池单元在使用过程中出现不一致的问题,为提升电池的性能、寿命和安全性,以锰酸锂电池组为研究对象,设计了一种基于变压器反激原理的主动均衡系统。系统包括均衡电路和控制策略。均衡电路采集电池状态信号并采用双向反激变换器进行电池组与单体电池之间的能量转移以进行电池均衡。均衡算法通过控制器执行,以均衡电路采集的电池电压信号作为均衡判断条件,以单体电池剩余容量与电池组平均容量的差值作为均衡开启条件,进行均衡控制。测试结果表明:所设计的均衡系统误差较小,均衡效果良好,均衡速度快。
Aiming at the inconsistent problems of battery cells in the lithium battery pack of electric vehicles may have during use,in order to improve the performance,life and safety of the battery,a lithium manganese oxide battery pack is taken as the research object,and an active equalization system based on transformer flyback principle is designed.The system includes equalization circuit and control strategy.The equalization circuit collects the battery status signal and uses a bidirectional flyback converter to perform energy transfer between the battery pack and the single cell for battery equalization.The equalization algorithm is executed by the controller,and the battery voltage signal collected by the equalization circuit is used as the equalization judgment condition,and the difference between the remaining capacity of the single battery and the average capacity of the battery pack is used as the equalization on condition to perform equalization control.The test results show that the designed equalization system has less error,good balance effect and fast equalization speed.
作者
朱恩来
李媛媛
陈少棠
滕力
ZHU Enlai;LI Yuanyuan;CHEN Shaotang;TENG Li(School of Electronic and Electrical Engineering,Shanghai University of Engineering and Technology,Shanghai 201620,China)
出处
《传感器与微系统》
CSCD
北大核心
2021年第3期77-80,共4页
Transducer and Microsystem Technologies
基金
国家自然科学基金资助项目(61803254)。
关键词
锂电池组
主动均衡
反激变换器
双向均衡
lithium battery pack
active equalization
flyback converter
bidirectional equalization
