HIGH VOLTAGE INTERLOCK CIRCUIT AND DETECTION METHOD THEREOF

The application discloses a high voltage interlock circuit and a detection method thereof. The circuit comprises: a first switching module, one terminal of the first switching module is connected to a first power supply, and the other terminal of the first switching module is connected to one terminal of a high voltage component module and a first power ground; a second switching module, comprising a first driving unit and a first switching unit arranged in isolation, the first switching unit is arranged between a second power supply and a second power ground; a third switching module, comprising a second driving unit and a second switching unit arranged in isolation, the first driving unit and the second driving unit are both arranged between the high voltage component module and the first power ground, and the second switching unit is arranged between the third power supply and the second power ground; a fourth switching module, arranged between the fourth power supply and the first power ground; a controller, for determining the fault of the high voltage component module by using the first detection result at one terminal of the first switching unit and the second detection result at one terminal of the second switching unit. The embodiments of the application improve the accuracy of fault detection.