【摘要】 电池组在使用的过程中,由于温度场分布不均匀以及库伦效率的差异,各单体间的剩余容量将会出现不一致性,这将会降低电池组的容量。为了提高电池组的性能,本文提出了以热力学荷电状态(thermodynamic-SOC,t-SOC)作为均衡判断依据,动力学荷电状态(kinetic-SOC,k-SOC)作为均衡控制依据的均衡控制策略。针对电池组在均衡前/后处于不同的状态提出电池组不均衡/均衡状态SOC估计算法。最终通过实验验证了电池组在不同状态下SOC估计的精度,并且根据所提出的均衡控制策略对电池组进行均衡,实现了较好的均衡效果。更多还原

【Abstract】 Due to the different temperature gradients and coulomb efficiencies, the remaining capacity between cells will be inconsistencies, which results in the decrease of the capacity of battery pack. In order to improve the performance of battery pack, an equalization control strategy, which is based on t-SOC decision and k-SOC control, is proposed. Moreover, SOC algorithm of battery pack at balanced/unbalanced state is proposed. Finally, the accuracy of SOC estimation has been verified at balanced/unbalanced state. The results indicate that our method can provide effective equalization.更多还原