Intelligent power distribution quick charger and control method thereof

Abstract

The invention relates to the field, in particular to an intelligent power distribution direct-current charger which comprises at least two direct-current charging guns used for charging an electric vehicle; each direct-current charging gun is provided with at least two rectification power modules, and each rectification power module is used for being coupled with an external power supply and outputting direct current; each direct-current charging gun is provided with a sampling unit which is used for collecting the charge state quantity of a power supply of the corresponding electric vehicle when the direct-current charging gun works; and a control unit, wherein when the charge state quantity of any direct-current charging gun is greater than a first preset value, the control unit is used for connecting at least one rectification power module connected to the direct-current charging gun to the other direct-current charging guns in the working state. The system has multiple charging modes: a single-gun full-power charging mode, a multi-gun simultaneous charging mode and an intelligent power distribution charging mode. The control unit can control the action of the rectifier module output contactor according to different SOC values of the vehicle storage battery under the condition of not influencing the continuous charging of the current channel.

Description

technical field [0001] The invention relates to the technical field of charging electric vehicles and power storage batteries, in particular to an intelligent power distribution fast charger. Background technique [0002] Electric vehicle (BEV) refers to a vehicle that uses the energy storage of the on-board power battery as the power source to provide the motor with driving energy for driving the wheels, and meets the requirements of road traffic and safety regulations. A fast charger is a device that can output large capacity for fast charging in a short period of time, and plays an important role in charging and supplying electric vehicles. No matter how the power density of the power battery technology is improved, it is inseparable from the use of DC charging facilities, which can shorten the charging time and increase the mileage. Therefore, using non-vehicle high-power fast chargers to charge electric vehicles is a charging station A common way of building options. ...

AI Technical Summary

Problems solved by technology

[0005] The first purpose of the present invention is to provide an intelligent power distribution fast charger, which solves the problem that the power between the modules and the charging gun unit cannot be automatically adjusted when the power of the DC fast charger or charging pile is combined with multiple modules and one machine is charged with multiple charges. Adjust the distribution, such as the case of high SOC value of the electric vehicle battery, the power of this unit module cannot be allocated to other charging guns, resulting in waste of resources, the power of the charger cannot be maximized when charging multiple guns at the same time, and the charging time is long , low efficiency and other issues;

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