基于SOC的串联电池组控流均衡控制策略

Current controlled equalization strategy for series battery strings based on SOC

传统Cuk均衡控制策略能量转移效率低,为维持电池组SOC(State of Charge)一致,文章提出了一种新型控制策略,保证了电池组的控流均衡。根据电池组的能量分布,该均衡控制策略能够实现对均衡器开关、均衡电流方向和大小的控制,提高了整体的能量转移效率。利用Matlab进行模型仿真分析,仿真结果表明,均衡控制策略要比传统均衡控制策略更加有效。

The traditional strategy based on the Cuk equalization circuit has a low energy transfer efficiency. In order to maintain the SOC consistency of battery, a new control strategy is proposed to ensure the control flow balance of the battery pack. According to the different energy distribution of the battery pack, the equalization control strategy can realize the control of the equalizer switch and the direction and size of the equalization current, so as to improve the overall energy transfer efficiency under the condition of maintaining a higher equalization speed. The simulation model is built with MATLAB, the simulation results show that the balanced control strategy is more effective than the traditional balanced control strategy.