New energy automobile power electronic unit connection state detection device

The utility model provides a new energy automobile power electronic unit connection state detection device, which relates to the technical field of new energy automobiles and comprises a power electronic unit internal connection circuit, a whole automobile wire harness end connector signal circuit and a vehicle-mounted controller sampling circuit. The internal connection circuit of the power electronic unit is connected with the signal circuit of the finished automobile wire harness end connector in a plug-in manner; the vehicle-mounted controller sampling circuit is connected with one side of the internal connection circuit of the power electronic unit; the other side of the internal connection circuit of the power electronic unit is grounded; the problems that in the prior art, when high-voltage connection of a series detection circuit is abnormal, it is difficult to rapidly and accurately judge a fault position, each connector of a parallel detection circuit is provided with a sampling circuit, the number