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：US20240039337A1

公开(公告)日：2024-02-01

申请号：US18356339

申请日：2023-07-21

Applicant: HUAWEI DIGITAL POWER TECHNOLOGIES CO., LTD.

Inventor： Yuechao LI ,  Chao WANG

IPC: H02J50/12 ,  H02M3/158 ,  H02M7/538

CPC classification number: H02J50/12 ,  H02M3/1582 ,  H02M7/53803 ,  H02J2207/20

Abstract: Example wireless charging methods and apparatus are described. In one example, a wireless charging module includes a control circuit, a charging coil, a tunable capacitor module, and a converter circuit. The converter circuit includes at least one of a rectifier circuit or an inverter circuit. The tunable capacitor module is connected in series between the charging coil and the converter circuit. The tunable capacitor module includes a plurality of capacitors and at least one controllable switch. The control circuit controls the at least one controllable switch to be turned on or off, to control an equivalent capacitance value of the tunable capacitor module. The equivalent capacitance value of the tunable capacitor module includes one of a first capacitance value or a second capacitance value.

公开(公告)号：US20230396101A1

公开(公告)日：2023-12-07

申请号：US18327358

申请日：2023-06-01

Applicant: Huawei Digital Power Technologies Co., Ltd.

Inventor： Yaoran FANG ,  Tong ZHANG ,  Yuechao LI

IPC: H02J50/12 ,  H02J50/40 ,  H04B5/00

CPC classification number: H02J50/12 ,  H02J50/402 ,  H04B5/0037

Abstract: An electronic device, including a first circuit, a second circuit, a coil, and one or more resonant circuits. The first circuit may transmit a first signal through the coil, and the second circuit may transmit a second signal through the coil. Frequencies of the first signal and the second signal are different. The resonant circuit may be disposed between the first circuit and the coil to prevent the second signal from passing or disposed between the second circuit and the coil to prevent the first signal from passing, so as to prevent the first signal from interfering with the second circuit or prevent the second signal from interfering with the first circuit.

公开(公告)号：US20220393515A1

公开(公告)日：2022-12-08

申请号：US17886724

申请日：2022-08-12

Applicant: Huawei Digital Power Technologies Co., Ltd.

Inventor： Yuechao LI

IPC: H02J50/60 ,  H02J50/12 ,  H02J7/00

Abstract: The wireless charging circuit includes an oscillation circuit and a monitoring circuit that are sequentially connected. The oscillation circuit includes an excitation voltage source, a full-bridge circuit, and an LC series circuit that are connected in series. When damped oscillation occurs in the LC series circuit, the LC series circuit outputs a resonant voltage signal during damped oscillation to the monitoring circuit. The monitoring circuit includes a comparison module and a processing module. The comparison module is configured to receive the resonant voltage signal and convert the resonant voltage signal into a digital square wave signal. The processing module is configured to receive the digital square wave signal, obtain a quantity of peaks, a quantity of troughs, or a sum of the quantity of peaks and the quantity of troughs and that is in a resonant voltage attenuation waveform, determine a quality factor Q.