The invention provides a dischargeable capacity estimation method of a power battery, a vehicle controller and a readable storage medium. The estimation method comprises the following steps: acquiring a current power battery state and historical travel energy consumption information of a target vehicle; according to the current state of the power battery, the historical travel energy consumption information and the target travel mileage, the estimated heat production amount is obtained; obtaining a first predicted temperature rise of the power battery according to the estimated heat production, the battery core attribute parameter and the cooling liquid attribute parameter; obtaining a target stroke prediction temperature of the power battery according to the initial temperature of the power battery and the first prediction temperature rise; an estimated dischargeable correction coefficient is obtained according to the corresponding relation among the target stroke prediction temperature, the battery cell temperature and the dischargeable correction coefficient; and obtaining the estimated dischargeable capacity according to the estimated dischargeable correction coefficient. The precision of the dischargeable capacity in the full temperature range can be improved, and the accurate estimated endurance mileage and the estimated remaining capacity can be obtained at any temperature.

    本发明提供了一种动力电池可放电量预估方法、车辆控制器及可读存储介质。预估方法包括:获取目标车辆的当前动力电池状态以及历史行程能耗信息;根据当前动力电池状态、历史行程能耗信息以及目标行驶里程得到预估产热量;并根据预估产热量、电芯属性参数及冷却液属性参数得到动力电池的第一预测温升;根据动力电池的起始温度以及第一预测温升得到动力电池的目标行程预测温度;根据目标行程预测温度、电芯温度与可放电修正系数之间的对应关系得到预估可放电修正系数;根据预估可放电修正系数得到预估可放电容量。本发明能够提升全温度范围内的可放电量的精度以及实现在任何温度下都能得到准确的预估续航里程以及预估剩余电量。


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    Title :

    Power battery dischargeable capacity estimation method, vehicle controller and medium


    Additional title:

    一种动力电池可放电量预估方法、车辆控制器以及介质


    Contributors:
    ISHIHAMA (author) / ZHANG LONGLONG (author) / HUANG FUQIANG (author)

    Publication date :

    2024-09-13


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

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