The invention discloses a fault detection circuit and a fault detection method. A fault detection circuit capable of detecting faults of a to-be-detected unit comprising a contactor and a driver of the contactor is formed by connecting six resistors. The circuit comprises six resistors and further comprises a contactor, a high-side driver, a low-side driver, a power supply and a first controller,and the contactor, the high-side driver, the low-side driver and the power supply are contained in the to-be-detected unit. The first controller can obtain a high-side sampling signal of a high-side switch sampling end, and determine whether a fault of the to-be-detected unit exists or not by utilizing the high-side sampling signal. Because the circuit can effectively detect the fault of the to-be-detected unit, the fault can be repaired or warned in time, the potential safety hazard of people and vehicles is reduced, and the driving safety is improved.

    本申请公开了一种故障检测电路及故障检测方法。通过接入六个电阻形成了能够对包含接触器及其驱动器的待检测单元的故障进行检测的故障检测电路。该电路中除了包括六个电阻以外,还包括接触器、高边驱动器、低边驱动器、电源以及第一控制器,其中接触器、高边驱动器、低边驱动器和电源包含在待检测单元中。其中,第一控制器能够获取到高边开关采样端的高边采样信号,并利用高边采样信号确定待检测单元的故障是否存在。由于该电路能够有效检测出待检测单元故障,因此便于及时修复故障或警示故障,减少人和车的安全隐患,提升行车安全性。


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    Title :

    Fault detection circuit and fault detection method


    Additional title:

    一种故障检测电路及故障检测方法


    Contributors:
    WANG JIRUI (author)

    Publication date :

    2020-05-08


    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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