The invention provides an SOC-OCV correction method for a power battery of an electric vehicle, and the method comprises the steps: building a corresponding table according to the corresponding relation between the minimum voltage Vmin of the power battery at different temperatures and the SOC; after the VCU of the vehicle is activated, the SOC calculation value of the current battery is calculated through an ampere-hour integral method, and whether the standing time of the power battery is larger than a set time threshold value or not is judged; if yes, the minimum voltage Vmin and the battery temperature of the power battery are obtained, and a corresponding current battery SOC correction value is obtained according to table look-up of the corresponding table; judging whether the current SOC correction value of the battery is smaller than a first threshold value or not, and if yes, judging whether a difference value between the current SOC calculation value of the battery and the current SOC correction value of the battery is within a set range or not; and if yes, taking the SOC correction value of the current battery as the SOC value of the current battery. The mileage detection accuracy of the electric automobile can be improved, and the mileage anxiety of a driver is reduced.

    本发明提供一种电动汽车动力电池的SOC‑OCV修正方法,包括:根据不同温度下动力电池的最小电压Vmin与SOC的对应关系,建立对应表;在车辆的VCU激活后,通过安时积分法计算得到当前电池SOC计算值,判断动力电池的静置时间是否大于设定时间阈值;如果是,则获取动力电池的最小电压Vmin和电池温度,并根据所述对应表查表得到对应的当前电池SOC修正值;判断当前电池SOC修正值是否小于第一阈值,如果是,则判断当前电池SOC计算值与当前电池SOC修正值之间的差值是否处于设定范围内;如果是,则将当前电池的SOC修正值作为当前电池的SOC值。本发明能提高电动汽车里程检测的准确性,降低驾驶员的里程焦虑。


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    Title :

    SOC-OCV correction method for power battery of electric vehicle


    Additional title:

    一种电动汽车动力电池的SOC-OCV修正方法


    Contributors:
    LI WENJIE (author) / LIANG RONGRONG (author) / YE CHANGSEN (author) / GAO QILONG (author) / WANG CHENGCHANG (author)

    Publication date :

    2022-12-06


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    G01R Messen elektrischer Größen , MEASURING ELECTRIC VARIABLES / B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen



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