Electric vehicle charger

Abstract

The invention discloses an electric vehicle charger. The electric vehicle charger comprises a power supply grid which is connected with an electric vehicle through a charger. An energy storage unit isconnected between the power supply grid and the charger. The energy storage unit is controlled by a control unit. The energy storage unit is connected in parallel to the existing DC charging system.When the grid is powered off, the electric energy of the energy storage unit is input to the DC charging system so as to realize uninterruptible power supply to an electric vehicle charging system. When the grid operates normally, the electric energy is directly input to the DC charging system through a bypass circuit, and when there is not enough electric energy in the energy storage unit, the control unit emits a signal to close the switch at the input end of the energy storage unit to charge the energy storage unit.

Description

technical field [0001] The invention belongs to the field of electric vehicle charging, and in particular relates to an electric vehicle charger. Background technique [0002] With the progress of society and the enhancement of environmental protection awareness, electric vehicles are gradually favored because they are powered by vehicle-mounted power supplies and can solve the problems of exhaust emissions from fuel vehicles, pollution of the environment, and high energy consumption. And the charging problem of electric vehicle is the problem that people pay close attention to very much, and it is related to popularization and promotion of electric vehicle. [0003] The input of the electric vehicle charging system is the low-voltage output 380V of the substation. When the power supply grid is suddenly disconnected, the power input of the entire electric vehicle charging system will be interrupted, which will cause at least two effects. 1. The electric car that is being c...

AI Technical Summary

Problems solved by technology

When the power supply grid is suddenly disconnected, the power input of the entire electric vehicle charging system will be interrupted, which will cause at least two effects

1. The electric car that is being charged cannot continue to be charged, and at the same time, due to a power outage, the charging power of the electric car cannot be uploaded to the cloud background

2. Electric vehicles waiting to be charged cannot be charged normally

The power outage of the charging station and the sudden cut off of the output of electric energy will greatly affect the enthusiasm of electric vehicle users and affect the promotion of electric vehicles in the future.

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