The invention provides an automobile power battery fault early warning method based on single battery voltage correlation. The automobile power battery fault early warning method comprises the following steps: acquiring voltage data of each single battery of a vehicle based on a time sequence after data cleaning; determining the length of a time window, obtaining the voltage data of each single battery in the current window, and calculating the sum of the voltage correlation coefficients of each single battery and other single batteries at each moment based on the sliding window by using a correlation coefficient algorithm; and a statistical tool Z score is used for the obtained voltage correlation coefficient of each single battery, a voltage abnormal coefficient A of each single battery at each moment is obtained based on a sliding window, an abnormal coefficient fault judgment threshold value is set, and power battery voltage inconsistency fault early warning is realized based on the abnormal coefficient of the voltage correlation coefficient of each single battery. The vehicle thermal runaway fault early warning system has the advantages of data simplification and easy acquisition, can realize real-time early warning of a vehicle thermal runaway fault, and can position a fault single battery.

    本发明提供了基于单体电池电压相关性的汽车动力电池故障预警方法,包括以下步骤:获取数据清洗后的基于时间序列的车辆各个单体电池的电压数据;确定时间窗口长度,获取当前窗口中各单体电池的电压数据,使用相关系数算法,基于滑动窗计算每个时刻各单体电池与其他单体电池的电压相关系数和;对得到的各单体电池的电压相关系数使用统计学工具Z分数,基于滑动窗得到每个时刻各单体电池电压异常系数A,设定异常系数故障判定阈值,基于各单体电池电压相关系数的异常系数实现动力电池电压不一致性故障预警。本发明具有数据精简的优点、易采集的优点,可以实现车辆热失控故障的实时预警,并且可以定位故障单体电池。


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    Titel :

    Automobile power battery fault early warning method based on single battery voltage correlation


    Weitere Titelangaben:

    基于单体电池电压相关性的汽车动力电池故障预警方法


    Beteiligte:
    AISATO YASUSHI (Autor:in) / JIA YONGQIANG (Autor:in) / GONG XIANWU (Autor:in) / MA JIAN (Autor:in) / MA YUCHENG (Autor:in) / ZHANG ZHAO (Autor:in) / LYU JINGJING (Autor:in) / QIU ZHIPENG (Autor:in)

    Erscheinungsdatum :

    2023-04-11


    Medientyp :

    Patent


    Format :

    Elektronische Ressource


    Sprache :

    Chinesisch


    Klassifikation :

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



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