基于时间优化算法的锂离子电池主被动均衡

Active-passive equilibrium of Li-ion battery based on time optimization algorithm

为避免因单体电池的不一致性而影响锂离子电池组的使用效率与寿命,设计一种主被动均衡相结合的均衡方案,其中主动均衡由单绕组反激变压器实现,且在控制策略中,利用基于区间搜索的时间优化算法得到使均衡时间最短的最优均衡目标值。搭建仿真模型,并运行多组随机数据的对比实验。与传统的将平均值设置为均衡目标相比,所提均衡方案可将均衡时间缩短约23%,该方案的可行性与有效性得到验证。

To avoid the inconsistency of the Li-ion battery pack which affected its efficiency and lifetime,an equalization scheme combining active and passive equalization was designed,where the active equalization was realized by a single winding flyback transformer.In the control strategy,the time optimization algorithm based on interval search was used to obtain the optimal equilibrium target value with the shortest equilibrium time.A simulation model was built and multiple sets of random data comparison experiments were run.Compared with the traditional average value set as the equilibrium target,the equilibrium scheme proposed could reduce the equilibrium time by about 23%,the feasibility and effectiveness of the scheme were verified.