One-machine and multi-gun direct-current charging pile system for automatic power distribution

Abstract

The invention relates to a one-machine and multi-gun direct-current (DC) charging pile system for automatic power distribution. The power distribution and power switching between multiple guns are realized through logic control for a relay and a charging module. Meanwhile, the automatic power distribution is realized through communication interaction between multiple charging gun controllers. Theautomatic power distribution mode is as follows: each gun is connected to two high-voltage direct current relays to respectively control on and off of DC+ and DC-; all power modules are at least divided into four power supply groups according to a certain ratio; output terminals of the power supply groups are connected to double-contact relays to respectively control the on and off of a positive electrode and a negative electrode of each of the output terminals. According to the automatic power distribution scheme provided by the invention, compared with the power sharing scheme and the automatic distribution scheme which are common in the market at present, the multiple guns charge simultaneously while different charging requirements of each vehicle are satisfied by using the fewest relays, thereby improving the effective utilization rate of module resources.

Description

technical field [0001] The invention relates to the technical field of charging piles, more specifically, to a DC charging pile system with an automatic power distribution control strategy for one machine and multiple guns. Background technique [0002] At present, the DC charging piles with multiple guns on the market are mostly used at bus stations, but for the small electric vehicles that are developing rapidly today, there are more low-power DC charging piles and AC charging piles with slower charging speeds and longer charging times. This status quo is obviously unable to meet the growing demand for electric vehicle charging. [0003] In order to solve the urgent demand for fast charging of buses, taxis, logistics vehicles and shared cars, shorten the charging time, improve charging efficiency and reduce operating costs. [0004] At the same time, in order to solve the problems that most of the power sharing schemes currently on the market cannot meet different chargin...

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Problems solved by technology

[0004] At the same time, in order to solve the problem that most of the current power sharing schemes on the market cannot meet different charging needs, and the automatic power distribution scheme uses a large number of relays, which cannot effectively reduce costs and increase wiring and control difficulties.

[0005] In addition, based on the fact that there are few parking spaces for electric vehicles in my country and the effect of public slow charging piles is not ideal, the society has a considerable demand for fast charging, and the demand for fast charging in places such as highways is even more urgent

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