The invention provides an insulation resistance detection method of an automobile battery, a calculation module, a device and an automobile, and the detection method comprises the steps: collecting a first voltage collected by a first sampling module and a second voltage collected by a second sampling module based on a preset sampling frequency; aiming at any sampling moment, determining an undetermined coefficient vector of the equivalent circuit model of the insulation resistance detection circuit at the sampling moment based on the first voltage and the second voltage collected at the sampling moment and a forgetting factor least square algorithm; and aiming at any sampling moment, based on the undetermined coefficient vector at the sampling moment and the target transfer function of the equivalent circuit model, determining the resistance values of the first equivalent insulation resistor and the second equivalent insulation resistor at the sampling moment. Therefore, the dynamic response of the automobile battery is simulated through the insulation resistance detection circuit, and the undetermined coefficient vector of the equivalent circuit model is updated in real time by using the forgetting factor least square algorithm to reduce the output error, so that the accuracy of detecting the insulation resistance of the automobile battery in real time is improved.

    本申请提供汽车电池的绝缘电阻检测方法、计算模块、装置及汽车,检测方法包括:基于预设采样频率,采集第一采样模块采集的第一电压以及第二采样模块采集的第二电压;针对于任一采样时刻,基于该采样时刻采集的第一电压、第二电压以及遗忘因子最小二乘算法,确定该采样时刻绝缘电阻检测电路等效电路模型的待定系数向量;针对于任一采样时刻,基于该采样时刻的待定系数向量和等效电路模型的目标传递函数,确定该采样时刻第一等效绝缘电阻和第二等效绝缘电阻的阻值。这样,通过绝缘电阻检测电路模拟汽车电池的动态响应,并利用遗忘因子最小二乘算法实时更新等效电路模型的待定系数向量来减小输出误差,提高了实时检测汽车电池的绝缘电阻的准确性。


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    Title :

    Insulation resistance detection method of automobile battery, calculation module, device and automobile


    Additional title:

    汽车电池的绝缘电阻检测方法、计算模块、装置及汽车


    Contributors:
    ZHU MINGYUE (author) / LIU MIAORAN (author) / LEI AO (author) / ZHANG WEIJIE (author) / TONG LICUI (author)

    Publication date :

    2024-10-01


    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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