The invention provides an electric quantity balance judgment method and device and an electric vehicle. The method comprises the following steps: acquiring a current signal and a voltage signal of a battery pack generator in the process of a current driving cycle, and a discharge current and a discharge voltage of a battery pack in the process of the driving cycle; determining the output energy Q1 of the battery pack generator based on a current signal, the voltage signal and the duration of the driving cycle; determining the discharge energy Q2 of the battery pack based on the discharge current, the discharge voltage and the duration; and if the output energy Q1 and the discharge energy Q2 meet a preset condition, judging that the electric quantity is balanced. According to the method, after each WLTC driving cycle is finished, the energy balance condition of the extended-range hybrid vehicle model can be quickly evaluated, the tedious process of measuring and calculating the energy balance by using a sensor is omitted, and the efficiency of the whole electric quantity keeping mode test is improved.

    本发明提供一种电量平衡判定方法、装置和电动汽车。该方法包括:获取当前一个驾驶循环的过程中电池包发电机的电流信号和电压信号,以及所述驾驶循环的过程中电池包的放电电流和放电电压;基于电流信号、所述电压信号和所述驾驶循环的时长,确定所述电池包发电机的输出能量Q1;基于所述放电电流、所述放电电压和所述时长,确定所述电池包的放电能量Q2;若输出能量Q1和放电能量Q2满足预设条件,则判定电量平衡。本发明能够在每一次WLTC驾驶循环结束后,快速的评估出增程混动车型的能量平衡情况,省去利用传感器测量计算能量平衡的繁琐流程,提升了整个电量保持模式试验摸底测试的效率。


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    Title :

    Electric quantity balance judgment method and device and electric vehicle


    Additional title:

    电量平衡判定方法、装置和电动汽车


    Contributors:
    HU XUAN (author) / SUN YONGFU (author) / WANG KAI (author) / LIU TAO (author)

    Publication date :

    2024-08-09


    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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