摘要
针对磷酸铁锂电池串联应用中,由于单体电池之间存在不一致,从而导致蓄电池组利用率和使用寿命降低的问题,本文提出一种基于非能耗型电压均衡方式的复合式电路拓扑。该均衡电路在传统单体电池均衡电路的基础上,加入电池组间均衡电路进行拓扑优化,以提高电压均衡速度。通过对蓄电池组均衡优化策略进行仿真分析验证表明:与传统单一电压均衡电路相比,该优化策略控制简单、易于实现,在静态和充放电状态下,电池电压均衡速度都有明显提升,并且能有效避免电池组过充电或过放电现象,从而提高电池的使用寿命。
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 LiFePO_4 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.
作者
李锐华
李冀
胡波
胡浩
Li Ruihua;Li Ji;Hu Bo;Hu Hao(Electrical Engineering of Tongji University, Shanghai 201804)
出处
《电气技术》
2018年第3期1-1,2-7,共7页
Electrical Engineering
