Wireless charging alignment method and device, wireless charging system and electric vehicle

Abstract

The invention provides a wireless charging alignment method and device, a wireless charging system and an electric vehicle, and belongs to the field of wireless charging. A first detection circuit inthe wireless charging alignment device can detect a first induction signal of a power receiving coil in a positioning magnetic field generated by a power transmitting coil; and a second detection circuit can detect a second induction signal of the position detection coil in the positioning magnetic field, and the position determination circuit can determine a position of the power receiving coil relative to the power transmitting coil according to the first induction signal and the second induction signal. Compared with the prior art that a driver visually observes the relative positions of the two coils, by using the method, the device, the system and the electric vehicle of the invention, determined precision of the relative positions according to the two types of induction signals is higher, and therefore the alignment precision of the power receiving coil and the power transmitting coil can be effectively improved.

Description

technical field [0001] The present application relates to the field of wireless charging, in particular to a wireless charging alignment method and device, a wireless charging system, and an electric vehicle. Background technique [0002] Wireless charging (wireless power transmission, WPT) is a technology that uses coupled electromagnetic fields as the medium to transfer electric energy to charge the on-board power supply of electric vehicles. Compared with traditional contact charging, wireless charging has the advantages of convenient use, no spark and electric shock hazard, no mechanical wear, adaptable to a variety of harsh environments and weather, and easy to realize unmanned automatic charging and mobile charging. widely used. [0003] In related technologies, a wireless charging system generally includes: a power transmitting device arranged on the ground or underground, and a power receiving device arranged at the bottom of the electric vehicle. Wherein, the powe...

AI Technical Summary

Problems solved by technology

[0005] This application provides a wireless charging alignment method and device, a wireless charging system, and an electric vehicle, which can solve the problem of low alignment accuracy of the alignment method in the related art. The technical solution is as follows:

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