动力电池组健康状态评价方法的研究

Study on Methods for Estimating the State of Health of Battery Pack

为研究动力电池组内各单体电池的健康状态SOH(State of Health),对电池极化内阻和欧姆内阻特性进行分析.根据电池欧姆内阻提出相对健康状态的评价方法,并结合电池工作时内阻对端电压的影响,采用端电压对电池组内单体电池健康状态进行评价.最后进行了对比实验验证,实验结果证明了所提方法的准确性和可行性.

In order to estimate the state of health（SOH）of single cell in battery pack,this paper researched on the battery＇s polarization resistance and the Ohmic resistance emphatically.An evaluation methodology of the single cell＇s relative SOH was proposed on the basis of battery＇s internal resistance,and the SOH of single cell was evaluated using the terminal voltage combining with the internal resistance＇s effect on terminal voltage under working condition.and the result analysis of comparative experiment verified that the proposed method had high accuracy and effectiveness.