Electric automobile wireless charging coil apparatus capable of effectively increasing coupling coefficient

Abstract

The invention provides an electric automobile wireless charging coil apparatus capable of effectively increasing coupling coefficient. The electric automobile wireless charging coil apparatus comprises a transmitting coil, a receiving coil, a flexible magnetic conductive sheet, wherein one end of the flexible magnetic conductive sheet is fixedly installed on the receiving coil through a flexible magnetic conductive sheet fixing device, the other end of the flexible magnetic conductive sheet is suspended above the transmitting coil, and the receiving coil is fixed on a chassis of an electric automobile and is opposite to the transmitting coil installed on the ground. The electric automobile wireless charging coil apparatus can effectively increase the coupling coefficient of the transmitting coil and the receiving coil, so that the transmission efficiency of the entire wireless charging system is substantially increased. The electric automobile wireless charging coil apparatus is simply structured, is convenient to install, and has no negative effect on trafficability and normal driving of an electric automobile.

Description

technical field [0001] The invention relates to the technical field of wireless charging, in particular to a wireless charging coil device for an electric vehicle that can effectively improve the coupling coefficient. Background technique [0002] Due to its characteristics of safety, convenience and environmental protection, wireless power transmission technology has been paid more and more attention in people's life. This technology involves many aspects such as power electronic circuit, coil electromagnetic design, automatic control, communication protocol, among which coil electromagnetic design is particularly important. In recent years, as an important application of wireless power transmission technology - electric vehicle wireless charging technology has been greatly promoted, and major domestic and foreign research institutions and enterprises in the automotive field have joined in the research of this technology. [0003] Electric vehicle wireless charging technol...

AI Technical Summary

Problems solved by technology

However, if a "hard" ferrite core is placed in the air gap between the transmitting coil and the receiving coil as a magnetically conductive material like an ordinary transformer, the hard ferrite core needs to be fixed to the chassis of the electric vehicle or rely on ground machinery The device realizes the lifting of the magnetic core. The former will affect the minimum passing distance of the electric vehicle and affect the normal driving of the car. The latter has complex design and high manufacturing and maintenance costs.

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