The embodiment of the invention provides a relay protection circuit and method, a battery management system and an electric vehicle. The relay protection circuit is characterized in that an input end of a voltage detection circuit is electrically connected with a first end of a drive circuit of a relay; the output end of the voltage detection circuit is electrically connected with the input end of the enabling circuit, and when the voltage detection circuit detects that the power supply voltage of the driving circuit is lower than the pull-in voltage of the relay, a working instruction is sent to the enabling circuit; the output end of the enabling circuit is electrically connected with the second end of the driving circuit, and the enabling circuit outputs a control signal according to the working instruction, so that the driving circuit controls the relay to be disconnected according to the control signal. The power supply voltage in the drive circuit is detected through the relay protection circuit, and when the power supply voltage does not meet the contact pull-in voltage of the relay, the control signal is output, so that the drive circuit controls the relay to be disconnected according to the control signal, and the potential safety hazard caused by the fact that the contacts of the relay are adhered and cannot be disconnected is prevented.

    本申请实施例提供一种继电器保护电路、方法、电池管理系统及电动车辆。该继电器保护电路包括:电压检测电路的输入端与继电器的驱动电路的第一端电连接;电压检测电路的输出端与使能电路的输入端电连接,当电压检测电路检测到驱动电路的供电电压低于继电器的吸合电压时,向使能电路发送工作指令;使能电路的输出端与驱动电路的第二端电连接,使能电路根据工作指令输出控制信号,使得驱动电路根据控制信号控制继电器断开。本申请通过继电器保护电路检测驱动电路中的供电电压,当该供电电压不满足继电器的触点吸合电压时,输出控制信号,使得驱动电路根据控制信号控制继电器断开,防止发生由于继电器的触点粘连,无法断开所造成的安全隐患。


    Access

    Download


    Export, share and cite



    Title :

    Relay protection circuit and method, battery management system and electric vehicle


    Additional title:

    继电器保护电路、方法、电池管理系统及电动车辆


    Contributors:
    LU KEWEI (author) / LI JI (author) / CHEN WENDI (author) / JI XIANG (author)

    Publication date :

    2022-02-18


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    H02H EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS , Schutzschaltungsanordnungen / B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen




    Relay control circuit, relay control method and electric vehicle

    JIANG TAO / HUANG ZHEN / MA JIEGAO et al. | European Patent Office | 2022

    Free access