Charging method and device capable of achieving active protection in multi-gun charging mode of electric car

Abstract

The invention discloses a charging method and device capable of achieving active protection in a multi-gun charging mode of an electric car. The charging method comprises the steps that according to comparison relation between obtained values of charging voltage and / or charging currents fed back by a battery management system (BMS) of the electric car which is connected with a main charger and serves as a target car, and obtained values of charging voltage and / or charging currents output by all charging guns, whether the charging guns of all chargers are connected to the target car or not is judged through a monitoring module of the main charger; if yes, connection is normal, all the charging guns continue outputting charging electric energy required by charging of the target car till the charging finishing condition is met; and if not, connection is abnormal, the monitoring module of the main charger outputs a turn-off control signal to control a power module to stop charging and outputs warning information. According to the charging method and device, misoperation that multiple gun heads are connected with different electric cars in the multi-gun charging mode is recognized in time, charging output is turned off, and potential safety hazards are avoided.

Description

technical field [0001] The invention belongs to the technical field of electric vehicle charging, and in particular relates to a charging method and device for active protection in an electric vehicle multi-gun charging mode. Background technique [0002] Due to the depletion of fossil resources and the huge pollution of the environment caused by fuel vehicles, the automotive industry's attention and investment in environmentally friendly new energy vehicles have increased rapidly since 2000. The application in the public transportation system will be the first to start and be applied on a large scale. [0003] Participating units in the charging process of electric vehicles include: body (including charging socket, high-voltage contactor), power battery, BMS (battery management system), charging cable, charger, cloud platform (remote server) and other parts. Usually, each electric vehicle has a charging socket, and the charger has a connection line with a gun head, through...

AI Technical Summary

Problems solved by technology

[0009] In order to solve the above-mentioned defects existing in the prior art, the purpose of the present invention is to provide a charging method and charging device for active protection in the multi-gun charging mode of an electric vehicle, which solves the problem of charging an electric vehicle in the multi-gun mode in the prior art. The problem of low security

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