Wireless power charging device

• US 9,960,630 B2
• Filed: 06/06/2016
• Issued: 05/01/2018
• Est. Priority Date: 08/06/2015
• Status: Active Grant

• Current Assignee: Wit Co., Ltd.
• Original Assignee: Samsung Electro-Mechanics Co., Ltd. (Samsung Group)
• Inventors: Jang, Jae Hyuk, Lee, Hyun Jung, Song, Yeong Hwan
• Primary Examiner(s): Bernatz, Kevin M
• Application Number:
  US15/173,831
• Publication Number:
  US 20170040830A1
• Time in Patent Office: 694 Days
• Field of Search: None
• CPC Class Codes: H01F 27/288 Shielding
• CPC Class Codes: H01F 5/06 Insulation of windings
• CPC Class Codes: H02J 50/12 of the resonant type
• CPC Class Codes: H02J 50/70 involving the reduction of electric, magnetic or electromagnetic leakage fields
• CPC Class Codes: H02J 7/0044 specially adapted for holding portable devices containing batteries H02J7/0045 takes precedence

Abstract

A wireless power charging device includes a coil configured to transmit or receive a wireless power signal; an electromagnetic wave shielding sheet disposed proximate the coil; and, a heat radiation layer disposed on the electromagnetic wave shielding sheet.

Claims

1. A wireless power charging device, comprising:

a coil configured to transmit or receive a wireless power signal;

an electromagnetic wave shielding sheet disposed proximate the coil; and

a heat radiation layer disposed between the electromagnetic wave shielding sheet and the coil, wherein the heat radiation layer and the coil are embedded within a first and second adhesive layer, respectively,

wherein the coil comprises upper and lower covers and a coil pattern disposed between the upper and lower covers,

wherein the heat radiation layer has a shape substantially corresponding to the coil pattern, and

wherein the heat radiation layer comprises graphene.

2. The wireless power charging device of claim 1, wherein the upper cover, the lower cover, and the coil pattern form a flexible printed circuit board structure.

3. The wireless power charging device of claim 1, wherein the heat radiation layer is bonded to the coil pattern by an adhesive layer.

4. The wireless power charging device of claim 1, wherein the heat radiation layer is directly bonded to the coil pattern.

5. The wireless power charging device of claim 4, wherein the heat radiation layer is directly coated on a surface of the coil pattern.

6. The wireless power charging device of claim 1, wherein the electromagnetic wave shielding sheet is bonded to the first adhesive layer.

7. The wireless power charging device of claim 1, further comprising:

a cover layer bonded to the second adhesive layer.

8. The wireless power charging device of claim 1, wherein the heat radiation layer is bonded to the electromagnetic wave shielding sheet by the first adhesive layer.

9. The wireless power charging device of claim 1, wherein the wave shielding sheet is electrically separated by insulative portions into longitudinal portions or laminar layers, and configured to reduce eddy currents.

10. The wireless power charging device of claim 1, wherein the heat radiation layer is disposed between the coil and the electromagnetic wave shielding sheet, the heat radiation layer being configured to conduct heat from both the coil and the electromagnetic wave shielding sheet.

11. The wireless power charging device of claim 1, wherein the heat radiation layer comprises a two-dimensional structure formed of one layer having a repeating honeycomb shape.

12. The wireless power charging device of claim 11, wherein the heat radiation layer comprises carbon atoms sp2-hybridization bonded.

13. The wireless power charging device of claim 1, wherein the heat radiation layer and the coil contact each other, are affixed between the first and second adhesive layers, and are embedded in the first and second adhesive layers.

14. A wireless power charging device, comprising:

a resonance coil configured to transmit or receive a wireless power signal;

an electromagnetic wave shielding sheet disposed substantially normal to and on an opposing side of an ingress or egress side of the wireless power signal at the resonance coil; and

,

a heat radiation layer disposed between the resonance coil and the electromagnetic wave shielding sheet, the heat radiation layer being configured to thermally conduct heat away from the resonance coil and the electromagnetic wave shielding sheet, wherein the heat radiation layer and the resonance coil are embedded within a first and second adhesive layer, respectively,

wherein the resonance coil comprises upper and lower covers and a coil pattern disposed between the upper and lower covers,

wherein the heat radiation layer has a shape substantially corresponding to the coil pattern, and

wherein the heat radiation layer comprises graphene.

15. A method of forming a power charging device, comprising:

forming a conductive coil pattern;

forming a heat radiation layer on the conductive coil pattern;

embedding the heat radiation layer and the conductive coil pattern within a first and second adhesive layer, respectively; and

adjoining the conductive coil pattern with an electromagnetic wave shielding sheet so as to capture the heat radiation layer therebetween,

wherein the heat radiation layer has a shape substantially corresponding to the coil pattern, and

wherein the heat radiation layer comprises graphene.