An electric vehicle charging control pilot circuit based on an analog switch

Abstract

The invention discloses an analogue switch-based electric vehicle charge control guide circuit conforming to the national standard, and belongs to the field of electric vehicles. The analogue switch-based electric vehicle charge control guide circuit comprises a power supply connection detection module, a level conversion module and a level detection module; the connection state of a power supply plug and a power supply socket is judged according to output voltage of the power supply connection detection module; with an analogue switch as a main device, the level conversion module receives a pulse-width modulation (PWM) signal output by a power supply control device and converts the PWM signal into the PWM signal of which the amplitude is + / -12V according to the national standard; the level detection module keeps the level conversion module outputting a voltage peak value, so that the power supply control device collects the voltage peak value and judges the connection state of a charge interface and the state of a vehicle control device according to the voltage peak value; and when the condition is met, the power supply control device supplies electricity to the electric vehicle. The level detection module disclosed by the invention has the effects of keeping the voltage peak value and improving the load drive ability; the adopted device is low in price; the cost is reduced; and the analogue switch-based electric vehicle charge control guide circuit has promotional value.

Description

technical field [0001] The invention belongs to the field of electric vehicles, and in particular relates to an electric vehicle charging control guide circuit based on an analog switch. Background technique [0002] With the increasing popularity of electric vehicles, the application of electric vehicle charging systems is increasing, and the safety and reliability of its charging process are of paramount importance. Before charging an electric vehicle, it is first necessary to confirm whether the vehicle interface of the electric vehicle is properly connected to the power supply interface. If the vehicle interface is not properly connected to the power supply interface but is still being charged, it will easily lead to waste of energy, and sometimes even cause danger. When electric vehicles are charging, they also need to monitor the charging process in real time, and when abnormal conditions occur, the power should be cut off immediately. In the prior art, the electric ...

AI Technical Summary

Problems solved by technology

In the prior art, the electric vehicle charging control pilot circuit is relatively complicated, which is not conducive to cost saving

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