The invention discloses a vehicle power-off fault detection method, a battery management device and a vehicle. The vehicle power-off fault detection method comprises the steps that a power-off instruction is received; controlling the high-voltage line of the vehicle to be powered off, and performing fault detection and recording fault information in the power-off process; determining that a main positive contactor and a main negative contactor of the vehicle high-voltage line are disconnected and determining that an insulation fault exists according to the fault information, and performing insulation detection on the vehicle battery pack; if the insulation fault does not exist in the battery pack, determining that the insulation fault exists on the high-voltage load side of the whole vehicle; and if the insulation fault exists in the battery pack, determining that the insulation faults exist in the battery pack and the high-voltage load side of the whole vehicle. According to the method, the battery management device and the vehicle, when the high-voltage contactors are all disconnected and it is determined that the insulation fault exists, whether the insulation fault exists on the battery pack side or the high-voltage load side of the whole vehicle can be further located, insulation fault alarming can be conducted in time, and safety is improved.

    本发明公开了一种车辆下电故障检测方法和电池管理装置以及车辆,车辆下车检测方法包括:接收到下电指令;控制车辆高压线路下电,在下电过程中进行故障检测并记录故障信息;确定车辆高压线路的主正接触器和主负接触器均断开并且根据故障信息确定存在绝缘故障,对车辆电池包进行绝缘检测;若电池包内不存在绝缘故障,则确定整车高压负载侧存在绝缘故障;若电池包内存在绝缘故障,则确定电池包和整车高压负载侧均存在绝缘故障。本发明的方法和电池管理装置及车辆,在高压接触器均断开且确定存在绝缘故障时,可以进一步定位绝缘故障在电池包侧还是整车高压负载侧,可以及时进行绝缘故障报警,提高安全性。


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    Title :

    Vehicle power-off fault detection method, battery management device and vehicle


    Additional title:

    车辆下电故障检测方法和电池管理装置以及车辆


    Contributors:
    DING GENGXIN (author) / TIAN HAO (author) / SHEN XIAOFENG (author) / WU CHAO (author)

    Publication date :

    2024-06-28


    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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