High-voltage interlocking detection device, electric vehicle power supply system and electric vehicle

The utility model relates to a high-voltage interlocking detection device, an electric automobile power supply system and an electric automobile, and belongs to the technical field of electric automobiles. The utility model provides a high-voltage interlocking detection device. The device comprises a high-voltage interlocking detection circuit, a first control unit, a second control unit and a main circuit control switch used for being arranged on a power supply main circuit of a power battery in series. The output end of the first control unit is connected with the input end of the high-voltage interlocking detection circuit, the output end of the high-voltage interlocking detection circuit is connected with the input end of the second control unit, and the output end of the second control unit controls and is connected with the main circuit control switch. The first control unit is in communication connection with the second control unit. According to the device, if the first controlunit breaks down, the se