The invention relates to the field of electric vehicle power batteries, and discloses a power battery system and a heating system abnormity diagnosis method thereof, when the current state of a whole vehicle is stable, the actual current value of a whole vehicle heating system is obtained by using the current difference of the whole vehicle before and after a heating relay is closed; the actual current value is compared with the theoretical current range of the heating system, and if the actual current value exceeds the theoretical current range, the heating system is abnormal; the theoretical current range is calculated according to the number of the single cells corresponding to each heating branch, the heating voltage range corresponding to each single cell and the total resistance value of each heating branch. The effectiveness and the accuracy of heating system abnormity diagnosis are improved, misjudgment caused by the problems of long temperature judgment time or uneven temperature distribution and the like is avoided, the advancement of heating system abnormity judgment is improved, and judgment does not need to be carried out through the overall temperature rise of the power battery.

    本发明涉及电动汽车动力电池领域,公开了一种动力电池系统及其加热系统异常诊断方法,当整车电流状态稳定时,利用加热继电器闭合前后整车的电流差得到整车加热系统的实际电流值;将所述实际电流值与加热系统的理论电流范围进行比较,若超出,则加热系统异常;所述理论电流范围是根据各个加热支路对应的单体电芯数、单个单体电芯对应的加热电压范围、各个加热支路的总电阻值计算得到的。提高加热系统异常诊断的有效性和准确性,避免因温度判断时间长或温度分布不均等问题造成的误判,提高加热系统异常判断的提前性,不需要通过动力电池整体温升来进行判定。


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    Titel :

    Power battery system and heating system abnormity diagnosis method thereof


    Weitere Titelangaben:

    一种动力电池系统及其加热系统异常诊断方法


    Beteiligte:
    ZHENG JUNJIANG (Autor:in) / DUAN YUANXIANG (Autor:in) / CHEN YUQING (Autor:in)

    Erscheinungsdatum :

    29.08.2023


    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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