The invention relates to a method for detecting power battery faults based on battery capacity, and belongs to the technical field of power battery fault detection. The method comprises the following steps: obtaining discharge data of a to-be-detected battery and a comparison battery, and obtaining SOC values of the batteries; basic data Qi of the comparison battery are calculated; basic data Qi'of the battery to be tested are calculated; the basic data Qi'of the to-be-detected battery and the basic data Qi of the comparison battery are compared, when alpha * Qi 'is smaller than k * beta * Qi under the same SOC segment, it is judged that the to-be-detected battery breaks down, alpha and beta are both capacity weighting coefficients, and k is a battery fault defining coefficient. According to the method, the power battery fault is detected based on the online data, the abnormal value problem in the data collection process is considered, the battery to be detected is subjected to troubleshooting by comparing the weighting basic data of the battery to be detected and the same SOC fragments of the comparison battery, and the detection precision is higher than that of a traditional method.

    本发明涉及一种基于电池容量检验动力电池故障的方法,属于动力电池故障检测技术领域。该方法包括以下步骤,获取待测电池和对比电池的放电数据,得到电池的SOC值;计算对比电池的基础数据Q_i;计算待测电池的基础数据Q_i′;比较待测电池的基础数据Q_i′与对比电池的基础数据Q_i,当存在同样SOC片段下,α*Q_i′<k*β*Q_i时,判断待测电池故障,α和β均为容量加权系数,k为电池故障界定系数。本发明基于在线数据检验动力电池故障,并考虑了收集数据过程中的异常值问题,通过比较待测电池及对比电池各相同SOC片段加权基础数据,对待测电池进行故障排查,检验精度相对传统方法较高。


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    Title :

    Method for detecting power battery fault based on battery capacity


    Additional title:

    一种基于电池容量检验动力电池故障的方法


    Contributors:
    BAO WEI (author) / WANG PENGFEI (author) / SHEN YONGBAI (author) / WANG YUN (author) / JIANG MINGJUN (author) / SUN YAN (author) / JIANG ZIXIAN (author) / LIU HUAN (author)

    Publication date :

    2024-12-06


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    G01R Messen elektrischer Größen , MEASURING ELECTRIC VARIABLES / B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen



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