The invention provides an insulation resistance detection device and a fault detection method. The detection precision of insulation resistance is improved. An insulation resistance detection device according to an embodiment includes a first switch connected to a positive electrode side of a battery, a second switch connected to a negative electrode side of the battery, a detection resistor, a capacitor connected in parallel with the detection resistor, a measurement unit for measuring a voltage of the detection resistor, and a control unit. The control unit performs a first measurement process for calculating the insulation resistance on the negative electrode side of the battery on the basis of a first voltage measured by turning on the first switch and turning off the second switch, and a second measurement process for calculating the insulation resistance on the positive electrode side of the battery on the basis of a second voltage measured by turning off the first switch and turning on the second switch. And a third measurement process for calculating an offset voltage on the basis of a third voltage measured by turning off the first and second switches, and detecting a fault of the capacitor on the basis of a change in the voltage measured after switching the first to third measurement processes.

    本公开提供一种绝缘电阻检测装置以及故障检测方法,提高绝缘电阻的检测精度。实施方式所涉及的绝缘电阻检测装置具备:与电池的正极侧连接的第1开关、与负极侧连接的第2开关、检测电阻、与检测电阻并联连接的电容器、测量检测电阻的电压的测量部、以及控制部。控制部进行基于将第1开关导通、将第2开关断开而测量的第1电压来计算电池的负极侧的绝缘电阻的第1测量处理、基于将第1开关断开、将第2开关导通而测量的第2电压来计算电池的正极侧的绝缘电阻的第2测量处理、基于将第1以及第2开关断开而测量的第3电压来计算偏移电压的第3测量处理,基于切换第1~第3测量处理之后被测量的电压的变化来检测电容器的故障。


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    Titel :

    Insulation resistance detection device and fault detection method


    Weitere Titelangaben:

    绝缘电阻检测装置以及故障检测方法


    Beteiligte:
    IZUMITANI JUNJI (Autor:in) / NAKAO YOSHIHIRO (Autor:in)

    Erscheinungsdatum :

    2023-08-01


    Medientyp :

    Patent


    Format :

    Elektronische Ressource


    Sprache :

    Chinesisch


    Klassifikation :

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



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