Wireless charging receiving apparatus, transmitting apparatus, and system of terminal

Patent metadata

Field	Value
Publication number	US-11355964-B2
Application number	US-201916721310-A
Country	US
Kind code	B2
Filing date	Dec 19, 2019
Priority date	Jun 20, 2017
Publication date	Jun 7, 2022
Grant date	Jun 7, 2022

Abstract

A wireless charging receiving apparatus of a mobile terminal. The wireless charging receiving apparatus is configured to be disposed inside the mobile terminal and close to a metal rear housing (3) of the mobile terminal, and includes two interconnected coils (701,702). The two coils (701,702) are located in a same plane and are connected in series, and winding directions of the two coils (701,702) are opposite, so that directions of magnetic fluxes generated by the two coils (701,702) on the metal rear housing (3) are opposite, thereby resolving a problem of an eddy current on the metal rear housing of the mobile terminal such as a smartphone including a wireless charging system, and reducing a temperature of a metal body and reducing an energy loss without forming a hole or a seam on the metal rear housing.

First claim

What is claimed is:

1. A wireless charging receiving apparatus, wherein the wireless charging receiving apparatus is disposed inside a mobile terminal and close to a metal rear housing of the mobile terminal, wherein the wireless charging receiving apparatus comprises two interconnected coils, the two coils are located in a same plane and are connected in series, and winding directions of the two coils are opposite, so that directions of magnetic fluxes generated by the two coils on the metal rear housing are opposite, wherein the mobile terminal comprises a dual camera, wherein one of the two coils surrounds one camera of the dual camera.

2. The wireless charging receiving apparatus according to claim 1 , wherein magnetic fluxes of magnetic fields generated by the two coils on the metal rear housing are the same, so that a total magnetic flux passing through the metal rear housing is zero.

3. The wireless charging receiving apparatus according to claim 1 , wherein the plane in which the two coils are located is parallel to the metal rear housing.

4. A mobile terminal, comprising:
a wireless charging receiving apparatus, disposed inside the mobile terminal and close to a metal rear housing of the mobile terminal, wherein the wireless charging receiving apparatus comprises two interconnected coils, the two coils are located in a same plane and are connected in series, and winding directions of the two coils are opposite, so that directions of magnetic fluxes generated by the two coils on the metal rear housing are opposite, wherein the mobile terminal comprises a dual camera, wherein one of the two coils surrounds one camera of the dual camera.

5. The mobile terminal according to claim 4 , wherein another one of the two coils surrounds another camera of the dual camera.

6. The mobile terminal according to claim 5 , wherein the plane in which the two coils are located is parallel to the metal rear housing, wherein the two coils generate, through a position of the dual camera, electromagnetic induction with a magnetic field generated by a wireless charging transmitting apparatus that charges the mobile terminal, so that an energy loss is reduced when the magnetic field generated by the wireless charging transmitting apparatus penetrates the metal rear housing.

7. The mobile terminal according to claim 4 , wherein the mobile terminal further comprises a camera flash and a fingerprint recognition apparatus; wherein the other coil surrounds the camera flash or the fingerprint recognition apparatus, so that the two coils generate electromagnetic induction due to a magnetic field of the mobile terminal entering through a position of the camera flash or the fingerprint recognition apparatus.

8. The mobile terminal according to claim 7 , wherein the plane in which the two coils are located is parallel to the metal rear housing, wherein the two coils generate electromagnetic induction with a magnetic field generated by a wireless charging transmitting apparatus that charges the mobile terminal.

9. The mobile terminal according to claim 8 , wherein a total magnetic flux generated by the two coils at a position of the metal rear housing of the mobile terminal other than the position at which the camera flash or the fingerprint recognition apparatus is disposed is zero, to eliminate an eddy current generated when the magnetic field generated by the wireless charging transmitting apparatus penetrates the metal rear housing.

10. The mobile terminal according to claim 4 , wherein the two coils are identical coils.

11. A wireless charging transmitting apparatus, comprising:
a transmitting coil, wherein the transmitting coil comprises two interconnected coils, the two coils are located in a same plane and are connected in series, winding directions of the two coils are opposite, and wherein when a current flows through the two coils connected in series with each other, directions of magnetic fields generated by the two coils are opposite, so that when the wireless charging transmitting apparatus charges a mobile terminal, directions of magnetic fluxes passing through a metal rear housing of the mobile terminal are opposite, wherein the mobile terminal comprises a dual camera, wherein one of the two coils surrounds one camera of the dual camera.

12. The wireless charging transmitting apparatus according to claim 11 , wherein magnetic fluxes of the magnetic fields generated by the two coils on the metal rear housing are the same.

13. The wireless charging transmitting apparatus according to claim 11 , wherein the two coils are identical coils.

14. The wireless charging receiving apparatus according to claim 1 , wherein the two coils are disposed at a position parallel to a position of a camera flash, a fingerprint recognition apparatus, or the dual camera on the metal rear housing.

15. The wireless charging receiving apparatus according to claim 1 , wherein the two coils are arranged in one of a butterfly structure or a figure-8 structure, wherein the butterfly structure or the figure-8 structure comprises two single toroid coils that intersect.

16. The wireless charging receiving apparatus according to claim 15 , wherein the toroid coils comprise one of a ring shape, an oval shape, or a rectangular shape.

17. The wireless charging receiving apparatus according to claim 1 , wherein the two coils comprise identical coils.

18. The wireless charging receiving apparatus according to claim 1 , wherein the two coils comprise different shapes or winding quantities, and wherein magnetic fluxes of magnetic fields generated by the two coils on the metal rear housing are the same.

19. The mobile terminal according to claim 4 , wherein the two coils are arranged in one of a butterfly structure or a figure-8 structure, wherein the butterfly structure or the figure-8 structure comprises two single toroid coils that intersect.

20. The mobile terminal according to claim 4 , wherein the two coils comprise different shapes or winding quantities, and wherein magnetic fluxes of magnetic fields generated by the two coils on the metal rear housing are the same.

Assignees

• Huawei Digital Power Tech Co Ltd

Inventors

• Yang Songnan
• Hu Xiaoqing
• Cai Bing

Classifications

• H02J50/10 Primary

  using inductive coupling · CPC title

• H02J50/70

  involving the reduction of electric, magnetic or electromagnetic leakage fields · CPC title

• H02J7/02

  for charging batteries from AC mains by converters · CPC title

• H04M1/0264

  for a camera module assembly · CPC title

• H04M2201/08

  Magnetic elements · CPC title