基于能量分配的退役电池组均衡方法

针对退役电池组存在明显的不一致性问题，提出一种高效的可重构的均衡电路，该电路可以接入或旁路任意电池，以满足多个电池同时均衡的需求。在此基础上提出一种基于能量分配的均衡方法，通过非线性规划遗传算法求解各单体电池每个周期能量分配比例，从而计算出单体电池接入时长。同时在均衡过程中动态控制开关保持电池组接入电池数量固定，能有效避免可重构均衡电压波动大的问题。在MATLAB/Simulink搭建仿真模型验证，结果表明，与传统可重构均衡方法相比，所提方法在均衡过程中可以有效地保持电池组电压的稳定；与传统求解能量分配比例方法相比，所提求解方法在充电和放电状态下均衡时间分别减少约12.31%和13.39%,验证了方法的有效性。

Equalization method for decommissioned battery packs based on energy distribution

To address the more obvious inconsistency problem of retired battery packs,an efficient reconfigurable equalization circuit is proposed,which can bypass or access any battery to meet the demand of simultaneous equalization of multiple batteries.On this basis,an equalization method based on energy allocation is designed to solve the energy allocation ratio of each single battery in each cycle through a nonlinear planning genetic algorithm,so as to calculate the length of single battery access time.At the same time,the dynamic control switch keeps the number of accessed batteries fixed during the equalization process,which effectively avoids the problem of large fluctuation of reconfigurable equalization voltage.Finally,a simulation model is constructed in MATLAB/Simulink for verification,and the results show that compared with the traditional reconfigurable equalization method,the method proposed in this paper supports simultaneous equalization of multiple batteries and stabilizes the voltage of the battery pack during the equalization process.Compared with the traditional method of solving the energy distribution ratio,the proposed method reduces the equalization time by about 12.31%and 13.39%in the charging and discharging states,which confirms the effectiveness of this method.