摘要
以磷酸铁锂电池组内部不平衡性为研究对象,基于极端单体电池的保护原理,设计了一种双向能量转移式均衡电路及控制方法,以解决现有串联电池组在充放电时没有均衡或均衡效果不佳的问题.基于双向能量转移式均衡电路拓扑和工作原理,提出了一种以电池电压作为逻辑判断信号,采用多路开关分时均衡控制的策略,并利用Matlab/Simulink软件搭建仿真模型,进行了仿真实验,结果表明:该均衡电路结构及其控制算法有效克服了磷酸铁锂电池在串联成组使用时的短板效应以及工艺差异,保证了电池组中各单体电池容量的一致性,使整个电池组的剩余电量(SOC)最大化.
Taking the internal unbalance of lithium iron phosphate(LiFePO4) battery pack as the study object,based on the protection principle of extreme cell,a bi-directional energy transfer equalization circuit and its control method were designed to solve the problem of unbalance or poor equalization effect of current series battery packs during charging and discharging.On the basis of the topology and working principle of bi-directional energy transfer equalization circuit,a strategy of multi-channel switch time-sharing equalization control with battery voltage as logic judgment signal was proposed.The simulation model was built by using Matlab/Simulink software and the simulation experiment was carried out.The results show that the structure of the equalization circuit and its control algorithm can effectively overcome the short board effect and process difference of lithium iron phosphate batteries when they are used in series and in groups.It guarantees the capacity consistency of each cell in the battery pack,and ultimately maximizes the state of charge(SOC) of the whole battery pack.
作者
彭建华
潘继雄
周幼华
PENG Jian-hua;PAN Ji-xiong;ZHOU You-hua(Shenzhen Yujiaocheng Technology Co.,Ltd.,Shenzhen Guangdong 518116,China)
出处
《电源技术》
CAS
北大核心
2020年第6期875-879,共5页
Chinese Journal of Power Sources
