公开(公告)号：US12142949B2

公开(公告)日：2024-11-12

申请号：US17490150

申请日：2021-09-30

Applicant: HUAWEI DIGITAL POWER TECHNOLOGIES CO., LTD.

Inventor： Yuechao Li ,  Chao Yang

IPC: H01F27/28 ,  H01F27/36 ,  H01F38/14 ,  H02J50/00 ,  H02J50/10 ,  H02J50/70

Abstract: A shielding film includes a first film layer. The first film layer includes a first conductive part and a first insulating part, and the first insulating part penetrates the first conductive part in a thickness direction of the first film layer. Under electromagnetic influence of a first electromagnetic field, a first eddy current is formed in the first film layer, and a loop of the first eddy current is located in the first conductive part, so that the first eddy current has relatively high current intensity. Under electromagnetic influence of a second electromagnetic field, a second eddy current is formed in the first film layer, and a loop of the second eddy current passes through the first insulating part, so that current intensity of the second eddy current can be reduced.

公开(公告)号：US20230261531A1

公开(公告)日：2023-08-17

申请号：US18169991

申请日：2023-02-16

Applicant: Huawei Digital Power Technologies Co., Ltd.

Inventor： Yuechao Li ,  Chao Wang ,  Baoshan Wu ,  Changyuan Li

IPC: H02J50/90 ,  H02J50/10 ,  H02J50/00 ,  H02J7/00

CPC classification number: H02J50/90 ,  H02J50/10 ,  H02J50/005 ,  H02J7/0044

Abstract: A wireless charging module includes a charging coil and a magnetic alignment apparatus. The magnetic alignment apparatus includes a first permanent magnet and a second permanent magnet. The first permanent magnet and the second permanent magnet are disposed adjacently on one surface. The charging coil is disposed on an inner side or an outer side of the magnetic alignment apparatus. Magnetization manners for the first permanent magnet and the second permanent magnet are different. Magnetic field strength on an upper side and a lower side of the magnetic alignment apparatus is different.

公开(公告)号：US20230246486A1

公开(公告)日：2023-08-03

申请号：US18193616

申请日：2023-03-30

Applicant: Huawei Digital Power Technologies Co., Ltd.

Inventor： Yuechao Li ,  Bing Cai

IPC: H02J50/40 ,  H02J50/12 ,  H02M3/155 ,  H02M7/5387

CPC classification number: H02J50/402 ,  H02J50/12 ,  H02M3/155 ,  H02M7/5387 ,  H02J2207/20

Abstract: A transmit end for multi-device wireless charging includes N half-bridge inverter circuits, a multi-coil gating matrix, and a multi-coil module. Input terminals of the N half-bridge inverter circuits are connected to corresponding direct currents, and output terminals of the N half-bridge inverter circuits are connected to input terminals of the multi-coil gating matrix. The multi-coil gating matrix includes a plurality of switches configured to respectively connect the output terminals of the N half-bridge inverter circuits to corresponding transmit coils in the multi-coil module.