Electric vehicle direct current charging control guiding auxiliary circuit and system and controlling method

Abstract

The invention discloses an electric vehicle direct current charging control guiding auxiliary circuit and a system and a controlling method. The electric vehicle direct current charging control guiding auxiliary circuit comprises a connecting interface 1, a connecting interface 2, a connecting interface 3 and a connecting interface 4, wherein the connecting interface 1 and the connecting interface 2 are arranged at a non vehicle-mounted charging machine end, the connecting interface 3 and the connecting interface 4 are arranged at an electric vehicle end; a monitoring point 4 and a resistance R8 are sequentially arranged between the connecting interface 2 and a positive pole of a pull-up power supply U1 of the non vehicle-mounted charging machine; a resistance R7, a switch K8 and a monitoring point 3 are in series connection between the connecting interface 1 and the positive pole of the pull-up power supply U1 of the non vehicle-mounted charging machine, wherein the monitoring point 3 is not directly connected with the pull-up power supply U1; a monitoring point 5 and a resistance R9 are sequentially arranged between the connecting interface 3 and a protective earthing line PE of the electric vehicle; a resistance R10, a switch K9 and a monitoring point 6 are in series connection between the connecting interface 4 and the protective earthing line PE of the electric vehicle, wherein the monitoring point 6 is not directly connected with the protective earthing line PE of the electric vehicle; during working, the connecting interface 3 is electrically connected with the connecting interface 1, and the connecting interface 4 is electrically connected with the connecting interface 2.

Description

technical field [0001] The invention relates to an electric vehicle DC charging control guiding auxiliary circuit, system and control method. Background technique [0002] The electric vehicle charging market is developing rapidly. At the end of 2015, the newly revised GB / T 18487.1 "General Requirements for Electric Vehicle Conductive Charging System Part 1" and other five charging technology national standards were officially released. China's DC charging scheme is one of the four major international charging schemes. Has been included in the IEC 61851-23 standard. With the vigorous popularization and promotion of standardization, the following technical blind spots in the standard are found in the process of large-scale construction of charging facilities: [0003] First, in the existing design, there is no hard node signal in the Chinese DC charging scheme. When an emergency occurs during charging, only data communication messages are used as a trigger, which has a slow ...

AI Technical Summary

Problems solved by technology

[0007] In view of the above problems, the present invention provides an electric vehicle DC charging control guidance auxiliary circuit, system and control method. By setting the auxiliary circuit in the off-board charger end and the electric vehicle end, the reliability and timeliness of DC high-power charging are improved; Further, realize rapid judgment and real-time response to fault detection, and solve the current problem of undetectable and forward-compatible PE broken needles

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