A wireless charging and discharging system for electric vehicles

Abstract

The invention discloses a wireless bidirectional charging and discharging system for an electric vehicle, which includes a first circuit and a second circuit; the first circuit includes a bidirectional AC-DC circuit, a first bridge circuit, a first coupling mechanism and a first control circuit, and the first circuit includes a bidirectional AC-DC circuit, a first bridge circuit, a first coupling mechanism and a first control circuit. The second circuit includes a second coupling mechanism, an active compensation circuit, a second bridge circuit, a bidirectional DC-DC circuit and a second control circuit. The first circuit and the second circuit establish a wireless connection and transmit vehicle information and instructions before charging and discharging, and then transmit charging information and shutdown instructions through the wireless connection after charging and discharging, avoiding real-time wireless connection during energy transmission. Transmit control information; no matter the system is working in charging or discharging mode, after the transmitter is started, only the receiver needs to perform closed-loop regulation according to the instructions to realize the two-way transmission of grid energy and battery energy. The invention does not adopt a receiving end regulation mode, and has the advantages of simple control, strong anti-offset regulation ability, wide voltage adaptability range, high transmission efficiency and the like.

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.

Images