The invention discloses an electric vehicle power battery self-heating method and system and an electric vehicle, electric vehicle power batteries are divided into a first power battery pack and a second power battery pack, and the first power battery pack and the second power battery pack are connected in series; acquiring battery temperatures of the first power battery pack and the second power battery pack; the battery temperatures of the first power battery pack and the second power battery pack are compared with a preset temperature threshold value, and when the battery temperatures of the first power battery pack and the second power battery pack are lower than the preset temperature threshold value, a series circuit of the first power battery pack and the second power battery pack is controlled to be connected; and when the battery temperatures of the first power battery pack and the second power battery pack are not lower than a preset temperature threshold value, a series circuit of the first power battery pack and the second power battery pack is controlled to be disconnected. The invention is used for solving the problems of non-uniform heat distribution and overlong heating time in the heating process of the power battery of the electric vehicle in the prior art.

    本发明公开了一种电动汽车动力电池自加热方法、系统及电动汽车,电动汽车动力电池分为第一动力电池组和第二动力电池组,第一动力电池组和第二动力电池组串联;获取第一动力电池组和第二动力电池组的电池温度;将第一动力电池组和第二动力电池组的电池温度与预设温度阈值进行比较,当第一动力电池组和第二动力电池组的电池温度低于预设温度阈值时,控制第一动力电池组和第二动力电池组的串联电路导通;当第一动力电池组和第二动力电池组的电池温度不低于预设温度阈值时,控制第一动力电池组和第二动力电池组的串联电路断开。本发明用以解决现有技术中电动汽车动力电池加热过程中热量分布不均匀及加热耗时过长问题。


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    Title :

    Self-heating method and system for power battery of electric vehicle and electric vehicle


    Additional title:

    一种电动汽车动力电池自加热方法、系统及电动汽车


    Contributors:
    CHENG BIN (author) / FAN WENKAI (author) / ZHANG ZHEYAN (author) / YUAN ZHONG (author) / FEI CHEN (author) / ZENG YUFEI (author)

    Publication date :

    2023-06-06


    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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