Electric vehicle DC charging control guide circuit and control method

Abstract

The invention discloses a direct current charging control and guide circuit for an electric vehicle, which includes a power supply side control guide circuit and a vehicle side control guide circuit. The power supply side control guide circuit includes a first feedback circuit and a second feedback circuit, and the vehicle side control guide circuit includes a first feedback circuit and a second feedback circuit. Three feedback circuits and a fourth feedback circuit. At the same time, a corresponding control method is also disclosed. The invention improves the reliability and timeliness of DC high-power charging by improving the existing control and guiding circuit, controls the switch state and monitors the voltage change of the monitoring point, realizes fast judgment and real-time response to fault detection, and solves the problem of current PE fault. The needle cannot detect the puzzle.

Description

technical field [0001] The invention relates to a direct current charging control guide circuit and a control method of an electric vehicle, belonging to the field of electric vehicle charging. Background technique [0002] High-power charging of electric vehicles can shorten the charging time, improve the charging consumption experience of car owners, and solve charging anxiety. Conductive DC high-power charging mainly increases the charging power to 350kW or above. With a single gun, it only takes 10-15 minutes to conduct conductive charging for the power battery. The focus is on high-power charging connection components, cooling technology, temperature monitoring technology, Charging communication control technology, high-power charger, etc. High-power DC charging technology and the existing 2015 version of standard charging technology (GB / T 18487.1-2015, GB / T 20234.1-2015, GB / T 20234.3-2015) are parallel technical routes, and will not be used for a long time in the futu...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the above technical problems, the present invention provides a DC charging control guide circuit and control method for electric vehicles. By improving the existing control guide circuit, the state of the switch is controlled and the voltage change of the monitoring point is monitored at the same time, so as to improve the reliability of DC high-power charging. and timeliness; realize rapid judgment and real-time response to fault detection, and solve the problem that PE broken needle cannot be detected at present

Images