The invention discloses an insulation resistance detection circuit, an insulation resistance detection method, a battery pack, a battery management system and a vehicle. The insulation resistance detection method using the insulation resistance detection circuit comprises the following steps: switching off and/or switching on switches of a positive electrode circuit and/or a negative electrode circuit of the insulation resistance detection circuit in different periods, and then detecting signals of different sampling points to a common ground; the insulation resistance is calculated by recording preset sampling signals obtained through detection in different periods, and finally detection of the insulation resistance is achieved. According to the invention, the resistor of the unbalanced bridge circuit is actively connected at a proper time, so that the purpose of quickly charging and discharging the voltage of the high-voltage ground capacitor is achieved, the detection period is shortened, and the insulation detection precision is not sacrificed.

    本发明公开了绝缘电阻检测电路、绝缘电阻检测方法、电池包、电池管理系统及车辆。利用该绝缘电阻检测电路进行绝缘电阻检测方法是,通过在不同周期断开和/或闭合绝缘电阻检测电路的正极电路和/或负极电路的开关,然后检测不同采样点对公共地的信号,通过记录不同周期下的检测得到的预定的采样信号来计算绝缘电阻,最终实现绝缘电阻的检测。本发明通过非平衡电桥电路自带的电阻,选择合适时机主动并入,实现高压对地电容电压快速充放的目的,从而减少检测周期,且不会牺牲绝缘检测精度。


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    Title :

    Insulation resistance detection circuit and method, battery pack, battery management system and vehicle


    Additional title:

    绝缘电阻检测电路及方法、电池包、电池管理系统及车辆


    Contributors:
    XU SHUMAO (author) / GUO YANAN (author) / ZHOU LIAN (author)

    Publication date :

    2024-07-05


    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 / H01M Verfahren oder Mittel, z.B. Batterien, für die direkte Umwandlung von chemischer in elektrische Energie , PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY



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