The invention provides a self-heating control method and device for a power battery and an electric vehicle, and relates to the technical field of electric vehicles, and the method comprises the steps that the required self-heating power of the power battery is obtained; when the required self-heating power meets a preset condition, whether the current state of the electric vehicle meets a power battery self-heating condition or not is judged; and when the current state meets the self-heating condition of the power battery, the Q-axis voltage of the permanent magnet synchronous motor is controlled to be zero, and the power battery is controlled to perform self-heating according to the D-axis voltage of the permanent magnet synchronous motor. According to the scheme, self-heating of the power battery is achieved, and the problem that the vehicle energy utilization rate is low due to the fact that heat is applied to the battery from the outside, and the temperature of the battery rises is solved.

    本发明提供一种动力电池自加热控制方法、装置及电动汽车,涉及电动汽车技术领域,所述方法包括:获取动力电池的需求自加热功率;在所述需求自加热功率满足预设条件时,判断电动汽车的当前状态是否满足动力电池自加热条件;在所述当前状态满足所述动力电池自加热条件时,控制永磁同步电机的Q轴电压为零,并根据所述永磁同步电机的D轴电压,控制所述动力电池进行自加热。本发明的方案实现了动力电池的自加热,避免了从外部向电池施加热量使其温度升高导致的车辆能量利用率低的问题。


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    Title :

    Power battery self-heating control method and device and electric vehicle


    Additional title:

    一种动力电池自加热控制方法、装置及电动汽车


    Contributors:
    LI WEI (author) / LIU CHAO (author) / LIANG HAIQIANG (author)

    Publication date :

    2021-05-04


    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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