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发明公开
CN103176137A 基于电池SOC不均匀性的电池组健康状态评价方法 有权 转让

基于电池SOC不均匀性的电池组健康状态评价方法
摘要：
本发明涉及一种基于电池SOC不均匀性的电池组健康状态评价方法，该方法依次包括以下步骤：（1）测量并计算电池组运行过程中m个不同时刻的电池组信息数据；（2）计算所有m个不同时刻的电池组信息数据对应的单体电池SOC不均匀性USOCi；（3）计算所有m个不同时刻的电池组信息数据对应的电池组最大可用容量CMaxi；（4）得到拟合函数p(USOCi)；（5）计算相关系数r；（6）重新选取一个任意时刻k，计算该时刻的电池组最大可用容量CMaxk，做判断，若判断成立，则说明该电池组健康状态差，需要进行更换维护；若不成立，则说明该电池组健康状态良好，无需维护。本发明计算得出的最大可用容量值准确性高，计算简便，能够更及时快速的反应电池组当前的健康状态。
摘要（英）：

The invention relates to a battery pack health condition evaluation method based on battery SOC (state of charge) inhomogeneity. The method sequentially includes the steps: (1) measuring and calculating battery pack information data at m different moments in a battery pack operational process; (2) calculating battery cell SOC inhomogeneity USOCi corresponding to the battery pack information data at the m different moments; (3) calculating battery pack maximum available capacity CMaxi corresponding to the battery pack information data at the m different moments; (4) obtaining a fitting function p(USOCi); (5) calculating a correlation coefficient r; and (6) reselecting an any moment k, calculating maximum available capacity CMaxk of a battery pack at the moment, making judgment, and if the judgment is satisfied, indicating that the battery pack is poor in health condition and needs to be replaced and maintained, otherwise, indicating that the battery pack is good in health condition and needs not to be maintained. The method is high in accuracy of calculated maximum available capacity values, simple in calculation and capable of showing health conditions of the battery pack more timely and rapidly.

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