Abstract：A compound circuit topology based on active voltage equalization method has been proposed in this paper, considering the decrease problem of utilization rate and battery life caused by the inconsistency between cells in series-connected LiFePO4 battery packs application. The balancing circuit is optimized by adding battery inter-group balancing circuit on basis of the traditional single cell balancing circuit in order to boost balancing speed. The simulation results show that compared with the traditional single voltage balancing circuit, the optimization strategy is simple and easy to implement. The balancing speed is obviously improved in the static, charging and discharging state. And it can prevent overcharge or overdischarge phenomenon, which prolongs the battery pack life.
李锐华, 李冀, 胡波, 胡浩. 基于Buck-Boost变换器的磷酸铁锂电池串联电压均衡优化策略[J]. 电气技术, 2018, 19(3): 1-7.
Li Ruihua, Li Ji, Hu Bo, Hu Hao. Voltage equalization optimization strategy for LiFePO4 series-connected battery packs based on Buck-Boost converter. Electrical Engineering, 2018, 19(3): 1-7.
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2018, Vol. 19 
