Locking device for charging plug and charging socket of electric vehicle

Abstract

The invention relates to a locking device for a charging plug and a charging socket of an electric vehicle. The locking device comprises a shell, a motor, a transmission chain, a lock disk, a lock pin, a lock pin spring, micro switches, a micro switch cam and a lock pin cam, wherein the lock disk is connected to the interior of the shell in a rotating way; the motor is arranged on one side of the lock disk in the shell; the transmission chain is in transmission connection with the motor and the lock disk; the micro switch cam and the lock pin cam are arranged on the lock disk, and rotate coaxially with the lock disk; the cam surface of the micro switch cam is pressed against the micro switches, so that the micro switches finish 'opening' and 'closing' action; the lock pin spring is connected to the lock pin; the cam surface of the lock pin cam is pressed against one end part of the lock pin; and the lock pin axially moves under the rotation of the lock pin cam and the elasticity of the lock pin spring. The locking device has the advantages that the charging plug and the charging socket are used for safe charging in a locked state, and an electrical signal is provided for control over the metering, charging and background maintenance management of a system, so that unattended charging is realized, and great convenience is brought to a charging station.

Description

[0001] technical field [0002] The invention relates to accessories of electric vehicles, in particular to a locking device for a charging plug and socket of an electric vehicle. Background technique [0003] In the national standard of electric vehicle charging mode, the electric vehicle charging mode 3 is to insert the charging plug with the cable into the charging socket installed on the AC charging pile or the electric vehicle, after the charging plug and the charging socket are combined in place After the power is turned on, the electric vehicle enters the charging mode, and after the charging is completed, the charging plug is pulled out from the charging socket. According to this standard, in the charging equipment of the existing charging station, a locking device is provided between the charging plug and the socket, so that non-charging station operators cannot pull the charging plug out of the charging socket at will, so that the charging station Charge manag...

AI Technical Summary

Problems solved by technology

But the existing locking device is only a mechanical locking device. After the plug is inserted into the socket, the charging power is manually connected. After the charging is completed, the power is manually disconnected to open the locking device.

Therefore, the existing locking device has such a defect: the information of the insertion or separation of the plug and the socket cannot be transmitted to the charging pile power supply system or the on-board charging system in time, which causes the charging device to use electricity unsafely. For example, if the rocker mechanism in the charging plug is not pressed normally during the charging process, the charging connector will be separated, and the core of the charging socket may already be charged at this time, which will inevitably cause an electric shock hazard, and the entire charging pile power supply system On the other hand, only relying on the mechanical locking device is not convenient for automatic billing of charging piles and background maintenance management, and cannot guarantee that the charging plug at the vehicle end will not be pulled out artificially during the charging process, which is not convenient for electric vehicles. Charging maintenance management

Images