Fast-charging station system

Abstract

The invention relates to a fast charging station system. The system structure of the fast charging station comprises: an expandable energy storage module comprising a plurality of parallel power battery packs and respective bidirectional DC voltage conversion circuits, which are connected with the fast charging piles, and each branch is independently controlled by a management unit. The power supply module comprises an AC / DC voltage conversion circuit and a three-phase four-wire alternating current input connected in parallel with the expandable energy storage module. The fast charging pile isconnected with the energy storage power supply module and transmits power to the battery to be charged through the charging joint. The energy management unit is connected with the expandable energy storage module and the grid power supply module, and sends commands to each control circuit. Compared with the prior art, the invention has the advantages of saving cost, high working efficiency, flexible configuration, environmental protection and the like.

Description

technical field [0001] The invention relates to the technical field of charging, in particular to a fast charging station system. Background technique [0002] As a new type of transportation that has developed rapidly in recent years, electric vehicles have the advantages of environmental protection, low cost of use, and easy maintenance. Under the circumstances that the pressure on environmental protection in Chinese cities has reached extremes, the promotion of electric vehicles has become an undisputed issue. national industry orientation. As the tram technology matures, the development of its supporting electric vehicle charging stations has become inevitable. [0003] However, the establishment of an electric vehicle charging station network is not easy to achieve in the short term. The main reason is that fast charging of electric vehicles requires instantaneous and powerful power, which cannot be met by conventional power grids. A dedicated charging network must be ...

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Problems solved by technology

[0003] However, the establishment of an electric vehicle charging station network is not easy to achieve in the short term. The main reason is that fast charging of electric vehicles requires instantaneous and powerful power, which cannot be met by conventional power grids. A dedicated charging network must be built, which involves the transformation of the entire national power grid. It cannot be achieved overnight. If electric vehicles do not carry out high-power fast charging, the charging process will be long, which will bring a lot of inconvenience to daily use, and it will be difficult to realize the popularization of electric vehicles. On the other hand, theoretically speaking, the power battery capacity will decay to 80% %, it is not suitable for continued use on the vehicle and needs to be decommissioned accordingly. With the surge in the number of new energy vehicles in recent years, how to deal with a large number of decommissioned power batteries has become a hot issue in the industry

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