公开(公告)号：US20210408846A1

公开(公告)日：2021-12-30

申请号：US17471867

申请日：2021-09-10

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Baoshan WU ,  Donghao WU ,  Wei ZHOU

IPC: H02J50/90 ,  H02J50/60 ,  H02J50/12

Abstract: A wireless charging apparatus is provided, which includes a transmit end or a receive end. The transmit end includes a transmit end resonant network and an inverter circuit, and the transmit end resonant network includes a transmitting coil. The receive end includes a receive end resonant network and a rectifier circuit, and the receive end resonant network includes a receiving coil. The apparatus further includes a controller which is configured to obtain a relative position between the transmit end and the receive end based on a self-inductance of the transmitting coil and at least one parameter. The at least one parameter includes a current of the transmitting coil, efficiency of a wireless charging system formed by the transmit end and the receive end, and a direct current output voltage at the receive end. There is a single change relationship between the at least one parameter and the relative position.