The invention discloses an insulation detection circuit, an insulation detection method and a battery management system. The circuit comprises a constant current source; the upper bridge arm comprises a first insulation resistor, a first resistor and a first capacitor which are connected in parallel between the positive electrode of the battery and the ground wire; the lower bridge arm comprises a second insulation resistor, a second resistor and a second capacitor which are connected in parallel between the negative electrode of the battery and the ground wire; the switch unit is respectively connected with the constant current source, the upper bridge arm, the lower bridge arm, the battery positive electrode and the battery negative electrode; wherein the switch unit is respectively used for controlling a first loop formed between the constant current source and the upper bridge arm and a second loop formed between the constant current source and the lower bridge arm so as to detect the resistance value of the first insulation resistor and the resistance value of the second insulation resistor. The insulation detection circuit is simple in structure, the safety of the battery management system is improved, and the collection and detection time of the insulation detection circuit is shortened.

    本申请公开了一种绝缘检测电路、绝缘检测方法及电池管理系统。该电路包括:恒流源;上桥臂,包括并联在电池正极与地线之间的第一绝缘电阻、第一电阻以及第一电容;下桥臂,包括并联在电池负极与所述地线之间的第二绝缘电阻、第二电阻以及第二电容;开关单元,分别连接所述恒流源、所述上桥臂、所述下桥臂、所述电池正极、所述电池负极;其中,所述开关单元分别用于控制所述恒流源与所述上桥臂之间形成的第一回路、所述恒流源与所述下桥臂之间形成的第二回路,以检测所述第一绝缘电阻、所述第二绝缘电阻的电阻值。本申请提供的绝缘检测电路不仅结构简单,而且还提高了电池管理系统的安全性,降低了绝缘检测电路的采集检测时间。


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    Title :

    Insulation detection circuit, insulation detection method and battery management system


    Additional title:

    绝缘检测电路、绝缘检测方法及电池管理系统


    Contributors:
    XIE YAOHUA (author)

    Publication date :

    2023-12-22


    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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