Wireless charging receiving device

• US 10,446,311 B2
• Filed: 10/03/2017
• Issued: 10/15/2019
• Est. Priority Date: 10/04/2016
• Status: Active Grant

• Current Assignee: Pegatron Corporation
• Original Assignee: Pegatron Corporation
• Inventors: Lu, Chin-Yu, Chen, Yen-Ming
• Primary Examiner(s): Diao, M Baye
• Application Number:
  US15/724,116
• Publication Number:
  US 20180096772A1
• Time in Patent Office: 742 Days
• Field of Search: 320108
• CPC Class Codes: H01F 27/02 Casings
• CPC Class Codes: H01F 27/288 Shielding
• CPC Class Codes: H01F 27/32 Insulating of coils, windings, or parts thereof
• CPC Class Codes: H01F 38/14 Inductive couplings for wireless supply or distribution of electric power using inductive coupling H02J50/10
• CPC Class Codes: H02J 50/10 using inductive coupling

Abstract

A wireless charging receiving device for receiving power from a power transmitting device of wireless charging including a body having an accommodation space and a slot, an induction coil and an electromagnetic absorption member in the accommodation space, and a power storage module is provided. At least a portion of the body has a metal shell corresponded to the accommodation space. The slot disposed in the metal shell connects the accommodation space and an exterior edge of the metal shell. The induction coil is insulatedly abutted against the metal shell and electrically connected with the power storage module. The power transmitting device magnetically resonates with the metal shell through generating an electromagnetic field. The metal shell generates an induced current and an electromagnetic field along the slot, and power converted from the energy of the electromagnetic field is transferred and stored in the power storage module.

Claims

1. A wireless charging receiving device, adapted to receive power from a power transmitting device of wireless charging, the wireless charging receiving device comprising:

a body, having an accommodation space and a slot, wherein at least a portion of the body comprises a metal shell, the accommodation space is located within the metal shell, the slot is located in the metal shell, and the slot connects the accommodation space and an exterior edge of the metal shell;

an induction coil, disposed in the accommodation space and insulatedly abutted against the metal shell;

a power storage module, disposed in the body and electrically connected to the induction coil; and

an electromagnetic absorption member, disposed in the accommodation space to shield the induction coil, the power transmitting device being adapted to magnetically resonate with the metal shell through generating an electromagnetic field, wherein the metal shell generates an induced current and a corresponding electromagnetic field along the slot, and the induction coil is configured to convert energy of the corresponding electromagnetic field into a power that is to be transferred and stored in the power storage module, wherein the metal shell has a first surface and a second surface opposite to each other, the power transmitting device is adapted to face the first surface, and the induction coil is located between the electromagnetic absorption member and the first surface.

2. The wireless charging receiving device as recited in claim 1, further comprising an insulation member disposed in the accommodation space and located within the induction coil, a side of the insulation member is abutted against the electromagnetic absorption member, and another side of the insulation member extends from the accommodation space to the first surface.

3. The wireless charging receiving device as recited in claim 1, wherein the slot connects the first surface and the second surface by penetrating through the metal shell.

4. The wireless charging receiving device as recited in claim 1, wherein the body comprises a first member and a second member, the second member is hinge jointed with the first member so that the second member is able to open up and close off relative to the first member, the second member is the metal shell, and when the second member opens up relative to the first member, the power transmitting device is adapted to face towards a surface of the second member.

5. The wireless charging receiving device as recited in claim 4, wherein the second member has a first edge and a second edge opposite to each other, the first edge is hinge jointed with the first member, and the slot is located at the first edge and breaks open the first edge.

6. The wireless charging receiving device as recited in claim 5, wherein an electrical insulation structure is further included at where the first member and the second member are hinge jointed.

7. The wireless charging receiving device as recited in claim 4, wherein the second member has a first edge and a second edge different from each other, the first edge is hinge jointed with the first member, and the slot is located at the second edge and breaks open the second edge.

8. The wireless charging receiving device as recited in claim 1, wherein the electromagnetic absorption member is a ferrite sheet material.

9. The wireless charging receiving device as recited in claim 1, further comprising a copper foil and a conductive pressure sensitive adhesive, wherein the induction coil is insulatedly abutted against the copper foil, and the conductive pressure sensitive adhesive is coated between the copper foil and the metal shell.