The invention relates to a monitoring method of a battery thermal management system, the battery management system and an electric vehicle. The monitoring method of the battery thermal management system comprises the following steps: acquiring a real-time heat transfer coefficient value between a power battery and a cooling device under a preset working condition; acquiring a reference heat transfer coefficient value between the power battery and the cooling device under the preset working condition and a corresponding first heat transfer coefficient deviation threshold value; calculating a difference value between the real-time heat transfer coefficient value and the reference heat transfer coefficient value; the absolute value of the difference value is compared with a first heat transfer coefficient deviation threshold value; and determining whether the battery thermal management system is in an abnormal state based on the comparison result. According to the monitoring method, the state of the battery thermal management system can be monitored in real time, abnormity of the battery thermal management system can be found in time, quantitative monitoring of the battery thermal management system can be achieved, instant or chronic changes of thermal management performance can be captured, early warning can be carried out on the battery thermal management system, and then potential safety hazards and energy waste can be effectively avoided.

    本发明涉及电池热管理系统的监控方法、电池管理系统和电动汽车。该电池热管理系统的监控方法包括:获取动力电池在预定工况下与冷却装置之间的实时传热系数值;获取动力电池在预定工况下与冷却装置之间的参考传热系数值和对应的第一传热系数偏差阈值;计算实时传热系数值与参考传热系数值的差值;将差值的绝对值与第一传热系数偏差阈值进行比较;基于比较结果确定电池热管理系统是否处于异常状态。该监控方法既可以实时监测电池热管理系统的状态,及时发现电池热管理系统的异常,还可以实现对电池热管理系统的量化监控,以便捕捉热管理性能的瞬时或慢性变化,从而可对其进行提前预警,进而能有效避免安全隐患和能源浪费。


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    Title :

    Monitoring method of battery thermal management system, battery management system and electric vehicle


    Additional title:

    电池热管理系统的监控方法、电池管理系统和电动汽车


    Contributors:
    WANG XIANPENG (author) / WANG SHUAILIN (author) / DUAN JUNCHAO (author) / FANG JIE (author)

    Publication date :

    2023-03-28


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen




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