A grid-friendly new energy vehicle fast charging system and charging method

Abstract

The invention relates to a quick charging technology for a new energy automobile, and particularly relates to a quick charging system used for a power grid friendly type new energy automobile and charging method of the quick charging system. The charging system comprises a power grid and a vehicle-mounted accumulator; the charging system further comprises a voltage transformation rectification filtration module, a super-capacitor bank charger module, a buck chopping module and charge control modules; the power grid is successively connected with the voltage transformation rectification filtration module, the super-capacitor bank charger module, the buck chopping module and the vehicle-mounted accumulator, and the charge control modules are connected with the super-capacitor bank charger module and the buck chopping module; the charge control modules are used for conducting real time monitoring on voltages and electric quantities of the super-capacitor bank charger module and the vehicle-mounted accumulator, and giving the feedback of the voltages and electric quantities to the super-capacitor bank charger module and the buck chopping module. The quick charging system supports the fast charging of the new energy automobile, and does not have impacting loads on the power grid, can adjust electricity consumption during peak and valley period, optimize electric power distribution and load balancing and can help a user save cost in battery charging; besides, circuit topology is very simple, and thus the quick charging technology can be put to a wide range of popularization and application.

Description

technical field [0001] The invention belongs to the technical field of fast charging of new energy vehicles, and in particular relates to a grid-friendly fast charging system and a charging method for new energy vehicles. Background technique [0002] It is well known that new energy vehicles usually use on-board batteries to provide electric energy input to drive the wheels, while on-board batteries need to replenish electric energy in time. At present, in order to solve the problems of slow charging speed and difficult to guarantee timeliness of new energy vehicles, fast charging technology has become an inevitable trend in the development of new energy vehicles. The fast charging method of new energy vehicles requires the power grid to output huge electric energy instantaneously, and the active power increases rapidly in the early stage of charging, and the frequency of the power grid will fluctuate greatly, causing the voltage of the power grid to drop sharply and causin...

AI Technical Summary

Problems solved by technology

This strategy belongs to passive protection, that is, the protection is started only after the impact of fast charging of new energy vehicles on the power grid exceeds the preset value, and it does not reduce the impact on the power grid in advance, and it cannot achieve both fast charging and stable power grid

Images