The invention provides balancing cells of a traction battery using statistical analysis. A vehicle includes a traction battery having a plurality of battery cells and a balance circuit configured to selectively discharge one or more of the battery cells. A controller is programmed to estimate charge capacities of the battery cells and determine a standard deviation of the estimated capacities. The controller is further programmed to determine a skewness of the estimated capacities. The controller is also programmed to, in response to the skewness exceeding a first threshold, command the balance circuit to discharge one or more of the battery cells when a state of charge (SOC) of the traction battery is less than a second threshold, and, in response to the skewness being less than the first threshold, command the balance circuit to discharge one or more of the battery cells when the SOC of the traction battery is greater than the second threshold.

    本公开提供了“使用统计分析来平衡牵引电池的电池单元”。一种车辆,包括:牵引电池,其具有多个电池单元;以及平衡电路,其被配置为选择性地对所述电池单元中的一个或多个进行放电。控制器被编程为估计所述电池单元的荷电容量并且确定所述估计容量的标准偏差。所述控制器还被编程为确定所述估计容量的偏斜度。所述控制器还被编程为:响应于所述偏斜度超过第一阈值,当所述牵引电池的荷电状态(SOC)小于第二阈值时,命令所述平衡电路对所述电池单元中的一个或多个进行放电;并且响应于所述偏斜度小于所述第一阈值,当所述牵引电池的所述SOC大于所述第二阈值时,命令所述平衡电路对所述电池单元中的一个或多个进行放电。


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    Titel :

    BALANCING CELLS OF A TRACTION BATTERY USING STATISTICAL ANALYSIS


    Weitere Titelangaben:

    使用统计分析来平衡牵引电池的电池单元


    Beteiligte:
    WANG RUI (Autor:in) / YANG XIAOGUANG (Autor:in) / ZHANG YUAN (Autor:in) / O AKIRA (Autor:in)

    Erscheinungsdatum :

    2021-05-25


    Medientyp :

    Patent


    Format :

    Elektronische Ressource


    Sprache :

    Chinesisch


    Klassifikation :

    IPC:    B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen / H01M Verfahren oder Mittel, z.B. Batterien, für die direkte Umwandlung von chemischer in elektrische Energie , PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY



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