The invention relates to a heating method of a power battery of an electric vehicle, which comprises the following steps: when the power battery needs to be heated, obtaining the water inlet temperature and the battery temperature of the power battery; based on the magnitude relation between the battery temperature and a first threshold value and a second threshold value, controlling the working rotating speed duty ratio of a battery water pump; and calculating the average temperature of the power battery based on the battery temperature, and controlling the heating power of a heat source based on the relationship between the absolute value of the difference value between the water inlet temperature and the average temperature and a third preset temperature difference value. The problem that the heating power of the heating source cannot be fully utilized in the prior art can be solved.

    本申请涉及一种电动汽车动力电池的加热方法,其包括如下步骤:当动力电池需要加热时,获取所述动力电池的进水温度和电池温度;基于所述电池温度与第一阈值和第二阈值的大小关系,控制电池水泵的工作转速占空比;基于所述电池温度,计算所述动力电池的平均温度,并基于所述进水温度与所述平均温度的差值的绝对值,与第三预设温差值的大小关系,控制热源的加热功率。本申请能解决相关技术中未能充分利用加热源的加热功率的问题。


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    Title :

    Heating method and heating system of electric vehicle power battery


    Additional title:

    一种电动汽车动力电池的加热方法及加热系统


    Contributors:
    ZHANG ZHONGYA (author) / WANG WEIMIN (author) / QU AIJING (author) / SHI RUI (author) / WANG MAOMAO (author)

    Publication date :

    2021-03-02


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    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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