A kind of intelligent power distribution fast charger and control method thereof

Abstract

The invention relates to the field, in particular to an intelligent power distribution DC charger, comprising at least two DC charging guns for charging electric vehicles; each DC charging gun is equipped with at least two rectifier power modules, each of which is The power modules are all used to couple the external power supply and output DC current; each DC charging gun is equipped with a sampling unit, which is used to collect the charge state quantity of the corresponding electric vehicle power supply when the DC charging gun is working; the control unit, when any When the state of charge of the DC charging gun is greater than the first preset value, at least one rectifier power module connected to the DC charging gun is connected to the remaining DC charging guns in working state. It has a variety of charging modes: single-gun full-power charging mode, multi-gun simultaneous charging mode, and intelligent power distribution charging mode; the control unit can control the action of the output contactor of the rectifier module according to different vehicle battery SOC values, without affecting the current channel. while charging.

Description

technical field [0001] The invention relates to the technical field of electric vehicle and power battery charging, in particular to an intelligent power distribution fast charger. Background technique [0002] Electric vehicle (BEV) refers to a vehicle that uses on-board power battery energy storage as a power source to provide the motor with driving energy for driving wheels, and meets the requirements of road traffic and safety regulations. A fast charger is a device that can output large capacity in a short time for fast charging, which plays an important role in the charging and supply of electric vehicles. No matter how the power battery technology improves the power density, it is inseparable from the use of DC charging facilities, which can shorten the charging time and improve the driving range. Therefore, the use of off-board high-power fast chargers to charge electric vehicles is a charging station. Common way of building options. [0003] Today's electric vehic...

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;

Images