Dynamic two-way wireless charging system and method for electric vehicle

Abstract

The invention provides a dynamic two-way wireless charging system for an electric vehicle. The dynamic two-way wireless charging system includes a transmitting device and a receiving device, the transmitting device includes an alternating current power supply, a power supply PFC circuit, a bi-directional DC / DC circuit, a first bi-directional AC / DC circuit, a first resonant compensation module, a first coil and a first control module; the receiving device includes a second coil, a second resonant compensation module, a second bi-directional AC / DC circuit, a storage battery pack, a third bi-directional AC / DC circuit, an alternating current dynamo, a super-capacitor and a second control module; and when the power PFC circuit works in a rectification mode, the bi-directional DC / DC circuit works in a buck chopper mode, the first bi-directional AC / DC circuit works in an inversion mode, the second bi-directional AC / DC circuit works in the rectification mode and the third bi-directional AC / DCcircuit works in the rectification or inversion mode, the electric vehicle is in a dynamic charging mode, and otherwise, the electric vehicle is in a feed mode. According to the dynamic two-way wireless charging system for the electric vehicle, the functions of dynamic charging of the electric vehicle and dynamic feed to a power grid are achieved at the same time, stable operation of the power grid is maintained, and energy waste is reduced.

Description

technical field [0001] The invention relates to the technical field of electric vehicle charging and discharging, in particular to a dynamic two-way wireless charging system and method for electric vehicles. Background technique [0002] With the commercialization of electric vehicles, the research on wireless charging technology for electric vehicles is becoming more and more important. Due to the limitations of power battery technology, the driving range of electric vehicles is limited to a certain extent, and the power battery needs to be charged frequently. Aiming at such problems, research on dynamic wireless power transfer technology for electric vehicles is gradually emerging. [0003] However, considering the important impact of large-scale access to the electric vehicle wireless charging system on the power grid, and the problem that the battery pack cannot quickly absorb regenerative braking energy when the electric vehicle is in the state of regenerative braking,...

AI Technical Summary

Problems solved by technology

[0003] However, considering the important impact of large-scale access to the electric vehicle wireless charging system on the power grid, and the problem that the battery pack cannot quickly absorb regenerative braking energy when the electric vehicle is in the state of regenerative braking, which will lead to energy waste, it is necessary to Under the premise of maintaining the stable operation of the power grid and reducing energy waste, it is possible to realize that the battery pack of electric vehicles has enough power or during the deceleration and downhill process of electric vehicles, supercapacitors are used to recover electric energy, and when the electric vehicle has a surplus of power, the battery pack, AC motors and supercapacitors feed power to the grid

[0004] However, there is currently a lack of corresponding technology on the market to achieve this, so it is necessary to provide a dynamic two-way wireless charging system for electric vehicles to solve the above problems

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