Electric automobile integrated direct-current charger, system and method

Abstract

The invention discloses an electric automobile integrated direct-current charger, a system and a method. Parallel contacts are adopted to sequentially connect busbars of single machines to form a loop; a control system is adopted to achieve intelligent electrical energy load distribution by controlling opening and closing of the parallel contacts; the parallel contacts are arranged inside single machines and are controlled to act by single machine acquisition control modules; different single machine main control modules are interlinked and communicate with one another through CAN buses, and the idle and fault states of the single machines can be broadcasted and submitted; the single machine charge module CAN buses can be intelligently switched to a main control module of a power modulation charger through a middle relay, thus achieving centralized control. The electric automobile integrated direct-current charger is small in single machine power, small in space occupation, capable of achieving in-group parallel operation and intelligent electric energy load distribution, easy in power amplification, low in cost, flexible in charge combination mode, relatively low in comprehensive cost, and high in charge module utilization rate.

Description

technical field [0001] The invention relates to an electric vehicle integrated DC charger, system and method. Background technique [0002] The crisis of traditional energy sources such as oil and coal continues to deepen, and the atmospheric environment continues to deteriorate. Energy conservation and emission reduction have become the main direction of future automotive technology development. Continuous breakthroughs in lithium-ion battery technologies such as lithium iron phosphate and modified lithium manganese oxide have opened up broad prospects for the popularization of electric vehicles. The subsequent construction of charging facilities is particularly important, and the construction of charging facilities needs a good operating model as a support. [0003] The charging station is equipped with a small energy storage station to store energy during the valley value of the power grid at night, and the operation plan of energy consumption during the peak period of t...

AI Technical Summary

Problems solved by technology

[0005] Chinese patent CN 103904737 A proposes a charging scheme with one pile and two chargers. This scheme can only realize the output of a single gun. When one gun is working, the other gun cannot work;

However, this solution requires a large number of DC contactors to realize power expansion, and the cost is high, and the cabinet occupies a large area; after expansion, only two guns can be output, and the average power of a single gun is relatively large, which also causes chargers The problem of low nighttime utilization

It can be seen that this kind of charger has certain limitations in the construction of charging stations.

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