System and method for on-board alternate automatic charging and power supply of electric vehicles

Abstract

The invention discloses a vehicle-mounted on-the-way alternating automatic charging and electricity supplying system and method for an electric vehicle. The vehicle-mounted on-the-way alternating automatic charging and electricity supplying system comprises a wind-driven generator, wherein the wind-driven generator provides a charging current for a first group of electronic switches and a second group of electronic switches through a rectifier, a DC-DC convertor and a constant-current charger; a charging interface of the first group of the electronic switches is connected with a first accumulator battery and an electricity supplying interface of the first group of the electronic switches is connected with a second accumulator battery and an electricity device, a charging interface of the second group of the electronic switches is connected with a second accumulator battery and an electricity supplying interface of the second group of the electronic switches is connected with the first accumulator battery and the electricity device; the first group of the electronic switches and the second group of the electronic switches are controlled to be alternately opened by a switching controller; when the first group of the electronic switches are opened, the first accumulator battery is charged and the second accumulator battery supplies electricity; when the second group of the electronic switches are opened, the second accumulator battery is charged and the first accumulator battery supplies electric. According to the vehicle-mounted on-the-way alternating automatic charging and electricity supplying system and method of the electric vehicle disclosed by the invention, the first accumulator battery and the second accumulator battery which are mutually independent are designed, so that periodically alternate charging and electricity supply can be realized, the smooth travelling of the electric vehicle is guaranteed, the endurance mileage is extended, and besides, the parking frequency for charging of the vehicle is reduced.

Description

technical field [0001] The invention relates to a system and method for on-board alternate automatic charging and power supply of an electric vehicle, belonging to the field of electric vehicle charging and power supply. Background technique [0002] With the country's vigorous promotion of green environmental protection, energy saving and emission reduction, electric vehicles have become the direction of my country's future automobile development. [0003] At this stage, pure electric vehicles have been preliminarily researched and manufactured in some areas of my country, but the manufacturing technology is still immature, and there are the following defects: the charging of pure electric vehicles is completely dependent on charging piles, and does not have the function of on-the-go charging, which limits the battery life The increase in mileage has become the biggest technical bottleneck of pure electric vehicles. [0004] At present, some researchers have also designed a...

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Problems solved by technology

[0003] At this stage, pure electric vehicles have been preliminarily researched and manufactured in some areas of my country, but the manufacturing technology is still immature, and there are the following defects: the charging of pure electric vehicles is completely dependent on charging piles, and does not have the function of on-the-go charging, which limits the battery life The increase in mileage has become the biggest technical bottleneck of pure electric vehicles

From the perspective of actual operation, this solution still has the following defects: First, this simple direct connection method cannot solve various complex problems faced by the battery itself in the process of charging and power supply, and cannot achieve effective charging of the battery

Second, when the electric vehicle is running, the working conditions of the battery and the wind energy generator are in a wide range of dynamic changes. Due to the low power density of wind energy, the power generation of the wind energy generator is limited, while the battery capacity of the electric vehicle is large. The gap between the two is obvious, so in the actual use process, the power imbalance between the wind generator and the battery is normal, and this imbalance will make the charging process in an abnormal state, which is very harmful to the wind generator and the battery. unfavorable

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