The invention discloses a vehicle wire harness connection diagnosis circuit, a diagnosis method and a vehicle, the diagnosis circuit comprises an MCU, a driving output loop and an interrupt signal acquisition loop, the driving output loop at least comprises a power device Q1, a driving resistor R1 and a connector J1, the power device Q1, the driving resistor R1 and the connector J1 are connected with the MCU, and the interrupt signal acquisition loop is connected with the MCU. The power device Q1, the driving resistor R1 and the connector J1 are sequentially connected in series, the power device Q1 is connected with an external power supply, the connector J1 is connected with a power utilization unit, a power supply control output end of the MCU is connected with a control end of the power device Q1, a first end of the driving resistor R1 is connected with an input end of the interrupt signal acquisition loop, and a second end of the driving resistor R1 is connected with an output end of the interrupt signal acquisition loop. And the output end of the interrupt signal acquisition loop is connected with the interrupt signal acquisition input end of the MCU. When the connection point of the wire harness connector is subjected to arc discharge ignition, the fault is diagnosed and locked at the second level, the current output of a fault circuit is cut off in time, and fire accidents are effectively avoided.

    本发明公开了一种车辆线束连接诊断电路、诊断方法及车辆,其中诊断电路包括MCU、驱动输出回路和中断信号采集回路,所述驱动输出回路至少包括一个功率器件Q1、驱动电阻R1和连接器J1,所述功率器件Q1、驱动电阻R1和连接器J1,所述功率器件Q1、所述驱动电阻R1和所述连接器J1依次串联,所述功率器件Q1连接外部电源,所述连接器J1连接用电单元,所述MCU的电源控制输出端连接所述功率器件Q1的控制端,所述驱动电阻R1的第一端连接所述中断信号采集回路的输入端,所述中断信号采集回路的输出端连接所述MCU的中断信号采集输入端。本发明在线束连接器连接点电弧放电打火时,以秒级别诊断并锁定故障,及时断开故障电路电流输出,有效避免火灾事故发生。


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    Title :

    Vehicle wire harness connection diagnosis circuit, diagnosis method and vehicle


    Additional title:

    一种车辆线束连接诊断电路、诊断方法及车辆


    Contributors:

    Publication date :

    2023-05-05


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    G01R Messen elektrischer Größen , MEASURING ELECTRIC VARIABLES / B60R Fahrzeuge, Fahrzeugausstattung oder Fahrzeugteile, soweit nicht anderweitig vorgesehen , VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR / H02H EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS , Schutzschaltungsanordnungen



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