Charging system of electric automobile

Abstract

The invention discloses a charging system of an electric automobile, which comprises a first electric energy acquisition device and a second electric energy acquisition device, wherein a power grid and a charger are arranged in the first electric energy acquisition device; the output end of the power grid is electrically connected with the input end of the charger; a solar panel and a DC / DC converter arranged in the second electric energy acquisition device; the output end of the solar panel is connected with the input end of the DC / DC converter. The invention is advantageous in that the device is reasonable in design; the charging system comprises the first electric energy acquisition device, the second electric energy acquisition device, an electric energy storage device and the DC / DC converter; two electric energy acquisition modes are provided, namely the power grid and the solar panel; the power requirement of the charger in the first electric energy acquisition device is not high, and the power requirement is 1 KW to 3KW; the charging machine with the power grade is light in structure, generally is of a brick structure, which almost does not occupy space and is very simple and convenient to apply; the system is practical in function and suitable for wide popularization.

Description

technical field [0001] The invention relates to the technical field of automobiles, in particular to a charging system for electric automobiles. Background technique [0002] Due to the advocacy of mitigating environmental pollution, electric vehicles have been vigorously developed in my country, but there are insufficient factors such as planning and construction of the charging infrastructure closely related to it, which largely affects the promotion and development of electric vehicles. [0003] At present, the charging modes of electric vehicles on the market are mainly divided into two types. The first is conventional charging. Conventional charging is mainly based on AC charging piles. The charging current is small, and the charging power is mainly 3.3KW and 7KW. The charging time is generally It takes 5-8 hours, the price of the charger and the installation cost are relatively low, and it can make full use of the low power period for charging. It is more suitable for ...

AI Technical Summary

Problems solved by technology

[0002] Due to the advocacy of alleviating environmental pollution, electric vehicles have been vigorously developed in my country, but there are insufficient factors such as planning and construction of the charging infrastructure closely related to it, which largely affects the promotion effect and development process of electric vehicles.

[0003] At present, the charging modes of electric vehicles on the market are mainly divided into two types. The first is conventional charging. Conventional charging is mainly based on AC charging piles. The charging current is small, and the charging power is mainly 3.3KW and 7KW. The charging time is generally It takes 5-8 hours, the price of the charger and the installation cost are relatively low, and it can make full use of the low power period for charging. It is more suitable for places such as homes and parking lots. However, the charging time is too long to meet the emergency operation needs of the vehicle. The second type For fast charging, fast charging is mainly realized through high-power DC charging piles, with power levels of 30KW, 60KW and 120KW, which provide short-term charging for electric vehicles within 20min to 2h of parking with a large current, and fast charging station construction facilities The cost is relatively high, and the charging current is relatively large. The general charging current is 150-400A, which requires the grid to have sufficient capacity support. Therefore, fast charging is limited by factors such as construction land and grid capacity, and it is difficult to build on a large scale.

[0004] One application of the existing technology is that the temporary supply of electric energy for electric vehicles mainly uses DC fast charging. The high-current charging of high-power DC charging piles provides short-term charging to obtain sufficient mileage. High-power DC charging Due to the short charging time, the piles are recognized by the majority of electric vehicle users. The application of DC charging piles is limited by factors such as construction land and grid capacity, and the distribution is small. For users who want to quickly supply electric energy to electric vehicles, it takes more time to find Charging pile

[0005] Another application of the existing technology is to install AC charging piles on the street lamps. While supplying power to the street lamps, the roadside parking spaces can just allow electric vehicles to be charged while parking, which improves the convenience of electric vehicles. For users who supply electric energy, the disadvantages of slow charging of AC charging piles can no longer meet their needs

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