An electric vehicle power supply system

Abstract

The invention relates to an electric vehicle power supply system. The system comprises multiple solar cells connected in parallel, DC-DC modules connected with all the solar cells in parallel in a one-to-one correspondence mode, an output interface used for being connected with an electric vehicle, an energy storage cell and gird and a controller; the controller comprises a power generation time reading module, a ratio calculating module, a power generation efficiency getting module and a distribution module; the power generation time reading module is used for reading the current power generation times and the rated power generation times of the solar cells; the ratio calculating module is used for calculating the difference values of the rated power generation times and the current powergeneration times, the ratio of the difference value to the rated power generation times is obtained, the power generation efficiency getting module is used for calculating the solar cell power generation efficiency drop-out value according to the ratio, and the distribution module is used for distributing the power generation current values of different solar cells and the number of the accessedsolar cells according to the the efficiency drop-out value. According to the system, the solar cells can be efficiently controlled to supply power to the electric vehicle, and the electric vehicle charging efficiency is improved.

Description

technical field [0001] The present application relates to the field of electric vehicle charging stations, in particular to an electric vehicle power supply system. Background technique [0002] With the development of solar energy technology, solar cell power generation has become commonplace, and solar cells have gradually been considered for household use, so that the whole family can form a self-sufficient power generation system. What's more, solar cells can be made into tiles. A large number of tile-shaped batteries can not only form a power generation array, but also form waterproofing on the roof of the home, and then form a series-parallel connection of multiple tile-shaped solar cells, which cannot be well determined according to the load current value. The number of solar cells and the longer service life of solar cells will reduce the efficiency. It is imperative to control the current of multiple solar cells according to the loss and efficiency of solar cells to...

AI Technical Summary

Problems solved by technology

[0002] With the development of solar energy technology, solar battery power generation has become commonplace at present, and solar batteries have gradually been considered for household use, so that the whole family can form a self-sufficient power generation system. What's more, the solar battery can be made into a tile shape A large number of tile-shaped batteries can form a power generation array and waterproof the roof of the home. Then, multiple tile-shaped solar cells are connected in series and parallel, and it is impossible to determine the input of solar cells according to the load current value. The number of solar cells, and the longer the service time of the solar cells, will reduce the efficiency. It is imperative to control the current of multiple solar cells according to the loss and efficiency of the solar cells to make the power supply of the solar cells highly efficient.

[0003] At the same time, at present, electric vehicles are becoming more and more popular, and electric vehicle charging stations cannot meet the needs of the general public, which seriously restricts the development of electric vehicles. Because electric vehicle charging has a certain impact on local power grids or power supply systems, it is necessary to meet Demand, the use of solar cells to generate electricity to alleviate the consumption of grid current can effectively solve the current consumption in a short period of time, and then, how to control the output of current to improve the efficiency of solar cells and prolong the service life of solar cells is an urgent problem to be solved

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