A charging pile with flexible power distribution and distribution method

Abstract

The invention discloses a charging pile with flexible power distribution and a distribution method, which includes a plurality of charging terminals and a plurality of power module groups; each power module group includes a plurality of power modules, a first DC bus, a second DC bus, a second A switch and a second switch, multiple power modules in each power module group are connected to the first DC bus through the first switch, and connected to the second DC bus through the second switch, the first DC bus is connected to the corresponding The charging terminals are connected; the first DC busbars of each power module group are connected in turn through the third switch to form a closed loop, and the second DC busbar is connected to the first DC busbar of the power module group arranged alternately through the fourth switch to form a Closed loop, by controlling the on-off of each switch to realize the scheduling of each power module in the power module group corresponding to the charging terminal and the scheduling of power modules in other power module groups, and realize the flexible distribution of power. The invention has the advantages of less number of switches, low cost, simple and convenient control and the like.

Description

technical field [0001] The invention mainly relates to the technical field of DC charging piles, in particular to a charging pile with flexible power distribution and a distribution method. Background technique [0002] In recent years, the number of DC charging piles has increased, and most of them adopt the distribution form of one pile and two guns. Each pile is equipped with a fixed number of power modules, but it cannot share power with other piles, resulting in a waste of power capacity. Although there are currently corresponding sharing between different power modules through switches, for example, patent CN106033904B proposes a matrix type flexible charging pile, which uses a large number of switches (the number of switches required is the product of the number of modules and the number of charging terminals), Control is complex. The charging pile power distribution system disclosed in patent CN110380464A adopts a configuration mode in which one power module corresp...

AI Technical Summary

Problems solved by technology

This method is not flexible enough, that is, a single power module cannot be allocated to any number of charging terminals, and the usage time of a single power module cannot be actively balanced through scheduling

In the current charging power allocation method, there are also the following deficiencies: 1. Insufficient flexibility, that is, a single power module cannot be allocated to any charging terminal; 2. The frequency of use of a single power module cannot be actively balanced through scheduling; 3. 1. The 1:1 configuration of the power module and the charging terminal reduces the flexibility of the charging stack. In the later stage, as the power demand of the charging terminal increases or the utilization rate of the charging station increases, it is difficult to increase the power of the charging stack.

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