Intelligent charging method and system for electric vehicle

Abstract

The invention discloses an intelligent charging method for an electric vehicle. The method comprises the steps of obtaining surplus power of a power grid on the inner side of a current transformer; according to the surplus power, carrying out power distribution on the remaining charging piles; and charging the connected electric vehicles according to the charging priority of the charging piles. The system comprises a plurality of charging piles, a first communication unit, a second communication unit and a master control system. The plurality of charging piles are in communication connection through the first communication unit, and the master control system is in communication connection with the charging piles through the second communication unit. According to the invention, by establishing communication connection between the charging piles and between the charging piles and the master control system, the charging power in the power grid and the charging demand of each charging pile are acquired in real time, and the surplus charging power is intelligently distributed in the charging peak period, so that the rationality of the load on the inner side of the transformer is ensured, and the charging demand in the peak period is also met.

Description

technical field [0001] The invention relates to the technical field of intelligent charging, in particular to an intelligent charging method and system for electric vehicles. Background technique [0002] Traditional vehicles generally use fuel and other non-renewable energy as fuel, and emit a large amount of exhaust gas, which is not conducive to building a resource-saving and environment-friendly society. Compared with traditional cars, electric cars use electric drive, which is a renewable energy source, and electric drive will not emit any exhaust gas. It has become a general trend that fuel vehicles are replaced by new energy vehicles. Especially in recent years, with the development of technology, battery life The breakthrough of electric vehicles has gradually been accepted by the market, so the prospect of electric vehicles is widely optimistic, and accordingly, the charging management system of electric vehicles is also paid more and more attention. [0003] With ...

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Problems solved by technology

[0005] Aiming at the problem that the transformers in most existing communities cannot meet the peak charging load of electric vehicles, a method and system for intelligent charging of electric vehicles is proposed. By establishing communication connections between charging piles and between charging piles and the master control system, real-time The charging power in the grid and the charging demand of each charging pile. During the charging peak period, the surplus charging power is intelligently allocated. In the case of no surplus power, if the priority of each charging pile is the same, the surplus charging power will be distributed evenly. If the priority Different, the charging power distribution is carried out according to the priority level, to ensure the rationality of the load inside the transformer, to ensure that the power grid is not overloaded, and to meet the charging demand during the peak period

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