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.