High-precision detection device for charging pile

The invention provides a high-precision detection device for a charging pile in the technical field of charging piles. The high-precision detection device comprises an MCU, an auxiliary power supply sampling circuit, an insulation resistor and charging connection detection circuit, a current sampling circuit, an auxiliary power supply, a charging gun interface, a communication module, a power supply module and an external reference voltage source VREF. One end of the auxiliary power supply sampling circuit is connected with the MCU, and the other end of the auxiliary power supply sampling circuit is connected with the auxiliary power supply and the charging gun interface; one end of the insulation resistor and charging connection detection circuit is connected with the MCU, and the other end of theinsulation resistor and charging connection detection circuit is connected with the charging gun interface; one end of the current sampling circuit is connected with the MCU, and the other end of thecurrent sampling