The invention relates to a charging method and system for prolonging the service life of a power battery, and the method comprises the following steps: 1), collecting the current charging current and the highest single voltage of the power battery in a charging process, and determining the corresponding open-circuit voltage through the current SOC of the power battery according to the pre-obtained corresponding relation between the SOC of the power battery and the open-circuit voltage; 2) obtaining a voltage difference value by subtracting the highest monomer voltage from the open-circuit voltage, and comparing the voltage difference value with an internal resistance product obtained by multiplying the current charging current by the current internal resistance of the power battery; when the voltage difference value exceeds the set range of the product of the internal resistance, iteratively adjusting the SOH of the power battery to enable the voltage difference value to be within the set range of the product of the internal resistance; adjusting the charging current of the power battery according to the adjusted SOH; the method for acquiring the current internal resistance of the power battery comprises the step of determining the current internal resistance of the power battery according to the SOC, the SOH and the temperature of the current power battery according to the pre-acquired corresponding relation between the SOC, the SOH and the temperature of the power battery and the internal resistance of the power battery.

    本发明涉及一种延长动力电池寿命的充电方法和系统,包括如下步骤:1)充电过程中,采集动力电池当前充电电流和最高单体电压,同时根据预先获得的动力电池SOC与开路电压的对应关系,由当前动力电池SOC确定对应的开路电压;2)将最高单体电压和开路电压作差得到电压差值,并与当前充电电流与当前动力电池内阻相乘得到的内阻之积作对比;当电压差值超过内阻之积设定范围时,迭代调整动力电池的SOH,使得所述电压差值处于内阻之积的设定范围内;根据调整后的SOH调整动力电池的充电电流;所述当前动力电池内阻的获取方法为,根据预先获得的动力电池的SOC、SOH、温度和动力电池内阻的对应关系,由当前动力电池的SOC、SOH和温度确定当前动力电池内阻。


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    Title :

    Charging method and system for prolonging service life of power battery


    Additional title:

    一种延长动力电池寿命的充电方法和系统


    Contributors:
    YUAN DONGXIA (author) / CAO RUIZHONG (author) / ZHENG JUNJIANG (author) / ZHOU SHIGUO (author)

    Publication date :

    2023-06-23


    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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