Wireless Charging Module, Electronic Device, and Charger

Patent metadata

Field	Value
Publication number	US-2023261531-A1
Application number	US-202318169991-A
Country	US
Kind code	A1
Filing date	Feb 16, 2023
Priority date	Feb 17, 2022
Publication date	Aug 17, 2023
Grant date	—

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.

First claim

1 . A wireless charging module, comprising:
a magnetic alignment apparatus comprising a first permanent magnet and a second permanent magnet, wherein the first permanent magnet and the second permanent magnet are disposed adjacently on a surface of the magnetic alignment apparatus, wherein magnetization manners for the first permanent magnet and the second permanent magnet are different, and wherein a magnetic field strength on an upper side and a lower side of the magnetic alignment apparatus is different; and a charging coil coupled to the magnetic alignment apparatus and configured to receive or transmit electricity, wherein the charging coil is disposed on an inner side or an outer side of the magnetic alignment apparatus.

2 . The wireless charging module of claim 1 , wherein the magnetization manner for the first permanent magnet comprises axial magnetization and the magnetization manner for the second permanent magnet comprises radial magnetization, or wherein the magnetization manner for the first permanent magnet comprises radial magnetization and the magnetization manner for the second permanent magnet comprises axial magnetization.

3 . The wireless charging module of claim 1 , wherein a first magnetic field direction in the first permanent magnet is perpendicular to the surface and a second magnetic field direction in the second permanent magnet is parallel to the surface, or wherein the first magnetic field direction is parallel to the surface and the second magnetic field direction is perpendicular to the surface.

4 . The wireless charging module of claim 1 , wherein a top-view cross-sectional shape of the first permanent magnet is one of a circular shape, a ring shape, an arc shape, or a polygonal shape, and wherein a top-view cross-sectional shape of the second permanent magnet is one of a ring shape, an arc shape, or a polygonal shape.

5 . The wireless charging module of claim 1 , wherein the magnetic alignment apparatus comprises a third permanent magnet, wherein a magnetization manner for the third permanent magnet is the same as a magnetization manner for the first permanent magnet, wherein a magnetic field direction in the third permanent magnet is opposite to a magnetic field direction in the first permanent magnet, wherein the third permanent magnet and the second permanent magnet are disposed adjacently on the surface, and wherein the charging coil is disposed on an inner side of the first permanent magnet or an outer side of the third permanent magnet.

6 . The wireless charging module of claim 5 , wherein a top-view cross-sectional shape of the third permanent magnet is one of a ring shape, an arc shape, or a polygonal shape.

7 . The wireless charging module of claim 5 , wherein the first permanent magnet, the second permanent magnet, or the third permanent magnet comprises one or more permanent magnet modules, and wherein magnetization manners for permanent magnet modules of a same permanent magnet are the same.

8 . The wireless charging module of claim 7 , wherein magnetic field directions in two adjacent permanent magnet modules in one permanent magnet are opposite.

9 . An electronic device, comprising:
a power module; and a wireless charging module coupled to the power module and comprising:
a magnetic alignment apparatus comprising a first permanent magnet and a second permanent magnet, wherein the first permanent magnet and the second permanent magnet are disposed adjacently on a surface of the magnetic alignment apparatus, wherein magnetization manners for the first permanent magnet and the second permanent magnet are different, and wherein magnetic field strength on an upper side and a lower side of the magnetic alignment apparatus is different, wherein magnetic field strength on an upper side of the magnetic alignment apparatus is weaker than magnetic field strength on a lower side of the magnetic alignment apparatus, and
a charging coil disposed on an inner side or an outer side of the magnetic alignment apparatus,
wherein the charging coil is electrically connected to the power module and is configured to receive electric energy transmitted by a second charging coil of a charger, and
wherein the magnetic alignment apparatus is configured to limit a contact location between the electronic device and the charger such that the charging coil of the charger matches the charging coil of the electronic device.

10 . A charger, comprising:
a power module; and a wireless charging module coupled to the power module and comprising:
a magnetic alignment apparatus comprising a first permanent magnet and a second permanent magnet, wherein the first permanent magnet and the second permanent magnet are disposed adjacently on a surface of the magnetic alignment apparatus, wherein magnetization manners for the first permanent magnet and the second permanent magnet are different, and wherein magnetic field strength on an upper side and a lower side of the magnetic alignment apparatus is different, and wherein magnetic field strength on an upper side of the magnetic alignment apparatus is stronger than magnetic field strength on a lower side of the magnetic alignment apparatus; and
a charging coil disposed on an inner side or an outer side of the magnetic alignment apparatus,
wherein the charging coil is electrically connected to the power module and configured to transmit electric energy to a second charging coil of an electronic device, and
wherein the magnetic alignment apparatus is configured to limit a contact location between the charger and the electronic device such that the charging coil of the charger matches the second charging coil of the electronic device.

11 . The charger of claim 10 , wherein the magnetization manner for the first permanent magnet comprises axial magnetization and the magnetization manner for the second permanent magnet comprises radial magnetization, or wherein the magnetization manner for the first permanent magnet comprises radial magnetization and the magnetization manner for the second permanent magnet comprises axial magnetization.

12 . The charger of claim 10 , wherein a first magnetic field direction in the first permanent magnet is perpendicular to the surface and a second magnetic field direction in the second permanent magnet is parallel to the surface.

13 . The charger of claim 10 , wherein a top-view cross-sectional shape of the first permanent magnet is one of a circular shape, a ring shape, an arc shape, or a polygonal shape, and wherein a top-view cross-sectional shape of the second permanent magnet is one of a ring shape, an arc shape, or a polygonal shape.

14 . The charger of claim 10 , wherein the magnetic alignment apparatus comprises a third permanent magnet, wherein a magnetization manner for the third permanent magnet is the same as a magnetization manner for the first permanent magnet, wherein a magnetic field direction in the third permanent magnet is opposite to a magnetic field direction in the first permanent magnet, wherein the third permanent magnet and the second permanent magnet are disposed adjacently on the surface, and wherein the charging coil is disposed on an inner side of the first permanent magnet or an outer side of the third permanent magnet.

15 . The charger of claim 14 , wherein a top-view cross-sectional shape of the third permanent magnet is one of a ring shape, an arc shape, or a polygonal shape.

16 . The charger of claim 14 , wherein the first permanent magnet, the second permanent magnet, or the third permanent magnet comprises one or more permanent magnet modules, and wherein magnetiz

Assignees

• Huawei Digital Power Tech Co Ltd

Inventors

• Li Yuechao
• Wang Chao
• Wu Baoshan
• Li Changyuan

Classifications

• H02J7/731

  specially adapted for holding portable devices containing batteries (H02J7/751 takes precedence) · CPC title

• H02J7/70

  characterised by the mechanical construction · CPC title

• H02J50/90 Primary

  involving detection or optimisation of position, e.g. alignment · CPC title

• H02J50/10 Primary

  using inductive coupling · CPC title

• H02J50/005 Primary

  Mechanical details of housing or structure aiming to accommodate the power transfer means, e.g. mechanical integration of coils, antennas or transducers into emitting or receiving devices · CPC title