公开(公告)号：US20250055327A1

公开(公告)日：2025-02-13

申请号：US18924722

申请日：2024-10-23

Applicant: Huawei Digital Power Technologies Co., Ltd.

Inventor： Yuechao LI ,  Chao WANG ,  Baoshan WU ,  Changyuan LI

IPC: H02J50/90 ,  H01F7/02 ,  H01F27/28 ,  H02J50/10

Abstract: A wireless charging module, an electronic device, and a charger. The wireless charging module includes a charging coil and a magnetic attachment apparatus. A magnetic attachment apparatus includes a plurality of magnetic attachment units where each one includes a first and a second assembly, and the first and the second assembly are disposed on a same surface in a first direction. The first assembly includes a plurality of magnets those magnetic field directions of which are parallel and opposite to each other, so that lateral magnetic fields cancel each other out, to weaken a magnetic field radiated around or to an inside by the magnetic attachment apparatus. Therefore, a soft magnetic material can be omitted or reduced. An enhancement in magnetic field strength on a side of the magnetic attachment apparatus leads to better limit a location of contact between the electronic device and the charger.

公开(公告)号：US20220337095A1

公开(公告)日：2022-10-20

申请号：US17853286

申请日：2022-06-29

Applicant: Huawei Digital Power Technologies Co., Ltd.

Inventor： Donghao WU ,  Baoshan WU ,  Chengliang ZHANG

IPC: H02J50/12

Abstract: This application provides a wireless power transmission system. The system includes a transmitter and a receiver, where the transmitter includes a DC/AC inverter circuit, a first resonant inductor, a first capacitor, and a first compensation inductor that are connected in series; and the receiver includes an AC/DC rectifier circuit, a second resonant inductor, a second capacitor, and a second compensation inductor that are connected in series; and power at the transmitter is transmitted to the receiver through electromagnetic induction between the first resonant inductor and the second resonant inductor, and the AC/DC rectifier circuit is configured to provide the rectified power to a load of the receiver. This solution is applicable to a wireless power supply scenario or a wireless charging scenario.

公开(公告)号：US20220337094A1

公开(公告)日：2022-10-20

申请号：US17852686

申请日：2022-06-29

Applicant: Huawei Digital Power Technologies Co., Ltd.

Inventor： Baoshan WU ,  Chengliang ZHANG ,  Donghao WU ,  Wei LU

IPC: H02J50/12 ,  H02J50/80 ,  H02J50/90

Abstract: A wireless electric energy transmission system is provided, including a transmitter and a receiver. The transmitter includes a DC/AC inverter circuit, a first inductor, and a first capacitor that are connected in series. The transmitter is configured to: detect a value of a resonant frequency of the transmitter; detect a value of a coupling coefficient between the transmitter and the receiver; obtain a value of a constant-voltage operating frequency of the transmitter through calculation based on the resonant frequency and the coupling coefficient; and control an operating frequency of the DC/AC inverter circuit based on the constant-voltage operating frequency obtained through calculation.

公开(公告)号：US20220231547A1

公开(公告)日：2022-07-21

申请号：US17581597

申请日：2022-01-21

Applicant: Huawei Digital Power Technologies Co., Ltd.

Inventor： Baoshan WU ,  Donghao WU

IPC: H02J50/90 ,  H02J50/40 ,  H02J50/12 ,  H02J50/60

Abstract: A wireless charging device is provided in this application, which includes: a transmitter coil, a controller, and at least two detection coils. The at least two detection coils are located on a side of a plane on which the transmitter coil is located, and a plane on which the detection coils are located is parallel to the plane on which the transmitter coil is located. The controller is configured to: separately control the at least two detection coils to sequentially connect to an excitation power source, obtain parameters of the detection coils connected to the excitation power source, and control, based on a value difference between the parameters of the at least two detection coils, the transmitter coil to move, so that the transmitter coil aligns with a receiver coil in an electronic device. Furthermore, an automatic alignment method and a charging dock are also provided in this application.

公开(公告)号：US20220085642A1

公开(公告)日：2022-03-17

申请号：US17535356

申请日：2021-11-24

Applicant: Huawei Digital Power Technologies Co., Ltd.

Inventor： Baoshan WU ,  Yunpeng YANG ,  Chengliang ZHANG ,  Bing CAI ,  Donghao WU

IPC: H02J7/04 ,  H02J50/12 ,  H02J7/00

Abstract: A wirelessly charged electronic device, a wireless charging method, and a wireless charging system are disclosed. A charger of a receive end of the system includes an open-loop DC-DC (direct current-to-direct current) converter. When power of a transmit end is greater than a first preset threshold of the transmit end and required charging power is greater than a first preset threshold of a receive end, the open-loop DC-DC converter is controlled to work in a fast charging phase, specifically including: controlling the open-loop DC-DC converter to work in a constant current step-down phase to charge a battery at a constant current, or controlling the open-loop DC-DC converter to work in a constant voltage step-down phase to charge the battery at a constant voltage.