A wireless charging and discharging system of an electric vehicle

Abstract

The invention discloses a wireless bi-directional charging and discharging system of an electric vehicle, comprising a first circuit and a second circuit. The first circuit comprises a bi-directionalAC-DC circuit, first bridge circuit, first couple mechanism and first control circuit, second circuit including second couple mechanism, active compensation circuit, second bridge circuit, bi-directional DC-DC circuit and second control circuit. The first circuit and the second circuit establish a wireless connection before charging and discharging and transmit automobile information and instruction, and transmit charging information and shutdown instruction through the wireless connection after charging and discharging, thus avoiding real-time transmission of control information through the wireless connection in the energy transmission process; Regardless of whether the system works in charge or discharge mode, after the transmitter starts up, only the receiver performs the closed-loop control according to the command to realize the bi-directional transmission of power grid energy and battery energy. The invention has the advantages of simple control, strong anti-deviation control ability, wide voltage adaptation range, high transmission efficiency and the like without adopting a receiving end regulation mode.

Description

technical field [0001] The invention belongs to the technical field of electric vehicles, and more specifically relates to a wireless bidirectional charging and discharging system for electric vehicles. Background technique [0002] The power of electric vehicles comes from the on-board energy storage system. At present, there are two ways of charging and discharging batteries: contact and non-contact. Compared with the contact charging and discharging method, the wireless charging and discharging system using non-contact charging and discharging can complete the two-way transmission of the electric energy of the public grid and the electric vehicle energy storage system without direct electrical connection, avoiding frequent connectors It simplifies the charging and discharging process, reduces the system operating cost, and has the advantages of convenient, simple, and reliable operation, so it has broad application prospects. [0003] At present, electric vehicles on the...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the defects of the prior art, the purpose of the present invention is to provide a circuit scheme of the electric vehicle wireless charging and discharging system, which aims to solve the problems of low conversion efficiency, complex control system and poor offset resistance in the prior art.

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