Charging system for electric vehicle, and charging method thereof

Abstract

The invention discloses a charging system for an electric vehicle. The charging system for the electric vehicle comprises a control unit, a clean energy unit, an energy storage unit and a charging unit; the charging unit is separately connected with the commercial power, the clean energy unit and the energy storage unit, and used for receiving electric energy and charging the electric vehicle; theenergy storage unit is separately connected with the commercial power and the clean energy unit, and used for receiving and storing electric energy; the control unit is connected with the clean energy unit, the energy storage unit and the charging unit, and used for controlling electric energy flow of each unit; the charging unit comprises more than one charging assemblies and energy storage modules; the various charging assemblies are in communication connection; and the various energy storage modules are mutually connected. The invention further discloses a charging method; the charging method comprises an independent charging mode and a networking charging mode; in the independent charging mode, the single charging assembly charges a single load; and, in the networking charging mode, the multiple charging assemblies charge the single load together. Both the charging system and method disclosed by the invention have the advantages of being suitable for loads of difference sizes, improving the charging precision and the like.

Description

[0001] The present invention application is a divisional application of application number 2017108407912. technical field [0002] The invention mainly relates to the technical field of electric vehicles, in particular to a charging system for electric vehicles and a charging method thereof. Background technique [0003] With the rapid development of our country's economy, the means of transportation has also been greatly improved. As a new type of means of transport newly developed in recent years, electric vehicles have advantages that many other means of transport do not have, such as lightness, environmental protection, and economy. With the improvement of road construction and road conditions in Chinese cities, it is an irreversible market demand trend for electric vehicles to replace traditional bicycles or cars with better efficiency, economical and practical. At present, the electric vehicle industry is beginning to mature and take shape. Its investment scale can be ...

AI Technical Summary

Problems solved by technology

However, the above charging system only considers fast charging for electric vehicles, and when the grid load is large, it will easily lead to insufficient power supply when charging electric vehicles, and further aggravate grid fluctuations, forming a vicious circle

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