磷酸铁锂电池组不同工作模态的均衡管理研究

Research on balanced management of lithium iron phosphate batteries under different working modes

在Buck-Boost电路基础上设计了基于功率电感的双向均衡电路,以单体电压差为均衡控制信号,设定阈值,使电池组静置、充电和放电,不同工作模态下实现高效的能量转移。搭建电池组均衡管理实验平台,用磷酸铁锂电池组进行实验,验证了该均衡电路和均衡策略可行。

Based on the Buck-Boost circuit,a two-way equalization circuit based on power inductors was designed.The voltage difference between the cells was used as the equalization control signal.The cell voltage difference was used as equalization control signal to set the threshold,and the battery pack was in the state of standing,charging and discharging.The energy of the battery pack was efficiently transferred in different working modes.A battery pack balance management experiment platform was built,and the experiments were performed with lithium iron phosphate battery packs.The results verify the feasibility of the balance circuit and balance strategy.