National standard charging gun signal detection device

Abstract

The invention discloses a national standard charging gun signal detection device, comprising a power supply unit, a comparator identification unit, a relay unit, and a D trigger unit; the comparator identification unit distinguishes the input terminal resistance signal of the national standard charging gun and communicates the identification Or the input resistance signal of the DC charging gun is output to the relay unit and the D flip-flop unit; the relay unit copies the input resistance signal of the input AC or DC charging gun and outputs it; the D flip-flop unit outputs according to the input AC or DC charging gun The resistance signal at the input end is logically "ANDed" and then outputs a wake-up signal to the electronic control system of the charged vehicle, and cancels the wake-up signal when receiving a reset signal from the vehicle's electronic control system. The advantage of the present invention is that the relay unit is used to copy the input end resistance of the national standard charging gun and then output, avoiding the problem of mutual interference caused by the input end resistance signal of the national standard charging gun when the detection device and other detection devices are used at the same time.

Description

technical field [0001] The invention relates to a charging signal detection device, in particular to a national standard charging gun signal detection device. Background technique [0002] When electric vehicles adopt the national standards GB_T 20234.2-2011 and GB_T 20234.3-2011 for AC and DC charging, it is necessary to detect the insertion status of the charging gun and the cable capacity according to the above national standards. The vehicle needs to be woken up for charging operation. At present, the detection device of the national standard charging gun is mostly implemented by a single-chip microcomputer plus an auxiliary circuit, so that it is necessary to write a program for the single-chip microcomputer and debug the program. Compared with the detection device implemented by pure hardware, it has the characteristics of low reliability, high cost, and complex circuits. At the same time, due to the real-time nature of the detection device and the low power consumpti...

AI Technical Summary

Problems solved by technology

At present, the detection device of the national standard charging gun is mostly implemented by a single-chip microcomputer plus an auxiliary circuit, so that it is necessary to write a program for the single-chip microcomputer and debug the program. Compared with the detection device implemented by pure hardware, it has the characteristics of low reliability, high cost, and complex circuits. At the same time, due to the real-time performance of the detection device and the low power consumption requirements of the microampere level, the design of the auxiliary circuit is very difficult when the above-mentioned single-chip microcomputer is used for detection.

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