The Research of a Fast Equalization Method for Grouping Lithium-Ion Batteries
After long period of use,the lithium-ion battery will produce inconsistencies among the individual cells,which will have an impact on the battery usage.In order to reduce this impact,a group equalization circuit is proposed to equalize the energy of the battery.An inductor is used for energy transfer between adjacent cells within the group,an equalization circuit based on Cuk circuit for transfer-ring energy between any cells is designed between the groups,and the intra-group and inter-group circuits can be equalized simultane-ously.The equalization strategy is also developed for the intra-group and inter-group circuits respectively,which largely accelerates the equalization speed.Finally,the simulation is built on the MATLAB/simulink platform,and the proposed method improves the equaliza-tion speed by about 35%compared with the traditional inductive grouping circuit for equalization,achieving better results.
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