The invention provides an insulation detection circuit and method. The circuit comprises a processor, a positive electrode sampling unit, a negative electrode sampling unit and a signal injection unit. The anode sampling unit is used for outputting a first sampling signal; the first end of the anode sampling unit is connected with the anode of the power battery pack, and the second end of the anode sampling unit is connected with a reference ground; the first end of the cathode sampling unit is connected with the cathode of the power battery pack, and the second end of the cathode sampling unit is connected with the reference ground; the first end of the signal injection unit is connected with the reference ground, and the second end of the signal injection unit is connected with the vehicle body ground; the processor is configured to determine an adopted insulation detection method according to the working condition of the automobile, and based on the determined insulation detection method, circuit self-detection and insulation resistance detection are carried out according to the first sampling signal and the second sampling signal which are sampled in real time, so that the effectiveness of the insulation detection of the automobile is ensured to be improved.

    本发明提供了一种绝缘检测电路及方法,电路包括处理器、正极采样单元、负极采样单元和信号注入单元;正极采样单元用于输出第一采样信号;正极采样单元的第一端用于连接动力电池组的正极,正极采样模块的第二端用于与参考地连接;负极采样单元的第一端用于连接动力电池组的负极,负极采样单元的第二端用于与参考地连接;信号注入单元的第一端与参考地连接,信号注入单元的第二端与车身地连接;处理器被配置为根据汽车工况确定采用的绝缘检测法,并基于所确定的绝缘检测法,根据实时采样的第一采样信号和第二采样信号进行电路自检和绝缘电阻检测,保证提高车辆绝缘检测的有效性。


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    Title :

    Insulation detection circuit and method


    Additional title:

    绝缘检测电路及方法


    Contributors:
    FAN YAOHUI (author) / WANG ENPENG (author) / BAI GUANGZHONG (author) / WANG LONGFEI (author) / YANG SHILIANG (author) / ZHANG YONG (author) / JIANG ZHAO (author)

    Publication date :

    2022-12-30


    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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