The invention relates to a pre-undervoltage grade determination method, a pre-undervoltage power control method, system, device and medium, the pre-undervoltage grade determination method comprises the following steps: obtaining the highest monomer temperature, the lowest monomer voltage and the assembly discharge current of a power battery of a vehicle in real time, matching the highest monomer temperature with the interval threshold value corresponding to each temperature use interval, determining a current temperature transition interval of the power battery, determining a discharge cut-off voltage corresponding to the temperature transition interval according to a preset temperature threshold value, a preset discharge cut-off voltage threshold value, a preset temperature increment and a preset maximum monomer temperature corresponding to the current temperature transition interval of the power battery, and determining the temperature of the power battery according to the discharge cut-off voltage. The voltage threshold range corresponding to each pre-under-voltage grade in the temperature transition interval is divided, the lowest monomer voltage and the assembly discharge current are matched with the voltage threshold range and the current threshold corresponding to each pre-under-voltage grade respectively, the current pre-under-voltage grade of the power battery is determined, and the problem of power loss is solved.

    本发明涉及预欠压等级确定方法、预欠压功率控制方法、系统、设备及介质,该预欠压等级确定方法包括实时获取车辆的动力电池的最高单体温度、最低单体电压和总成放电电流,将最高单体温度与各温度使用区间对应的区间阈值进行匹配,确定动力电池当前所处的温度过渡区间,根据动力电池当前所处的温度使用区间对应的预设温度阈值、预设放电截止电压阀值、预设温度增量及预设最高单体温度,确定温度过渡区间对应的放电截止电压,根据放电截止电压,划分温度过渡区间中各预欠压等级对应的电压阈值范围,将最低单体电压和总成放电电流分别与各预欠压等级对应的电压阈值范围和电流阈值进行匹配,确定动力电池当前所处的预欠压等级,解决了动力丢失问题。


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    Title :

    Pre-undervoltage grade determination method, power control method, system, equipment and medium


    Additional title:

    预欠压等级确定方法、功率控制方法、系统、设备及介质


    Contributors:
    YU XIAOPING (author) / GONG PAN (author) / PU JIANG (author) / YU CHENG (author) / LI ZONGHUA (author)

    Publication date :

    2023-08-15


    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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