SHEET FOR SHIELDING AGAINST ELECTROMAGNETIC WAVES AND WIRELESS POWER CHARGING DEVICE

• US 20160372975A1
• Filed: 06/17/2016
• Published: 12/22/2016
• Est. Priority Date: 06/18/2015
• Status: Active Grant

• Current Assignee: Wit Co., Ltd.
• Original Assignee: Samsung Electro-Mechanics Co., Ltd. (Samsung Group)
• Inventors: SONG, Yeong Hwan, JANG, Jae Hyuk, LEE, Hyun Jung
• Granted Patent: US 9,929,599 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H01F 27/2885 with shields or electrodes shields or electrodes for pancake coils H01F27/2871; construction of electric or magnetic shields or screens H01F27/36
• CPC Class Codes: H01F 27/36 Electric or magnetic shields or screens movable for varying inductance H01F21/10
• CPC Class Codes: H01F 27/366 made of ferromagnetic material
• 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
• CPC Class Codes: H02J 50/70 involving the reduction of electric, magnetic or electromagnetic leakage fields
• CPC Class Codes: Y02E 10/50 Photovoltaic [PV] energy

Abstract

A sheet is provided to shield against electromagnetic waves. The sheet includes a magnetic layer, and a heat radiation coating layer coating at least a portion of a surface of the magnetic layer.

Claims

1. A sheet to shield against electromagnetic waves, comprising:

a magnetic layer; and

a heat radiation coating layer coating at least a portion of a surface of the magnetic layer.

2. The sheet of claim 1, wherein the heat radiation coating layer is formed to cover an upper surface of the magnetic layer.

3. The sheet of claim 1, wherein the heat radiation coating layer is formed to cover upper and side surfaces of the magnetic layer.

4. The sheet of claim 1, wherein the heat radiation coating layer comprises graphene.

5. The sheet of claim 1, wherein the magnetic layer comprises magnetic layers stacked in a thickness direction.

6. The sheet of claim 5, wherein an adhesive layer is interposed between the magnetic layers.

7. The sheet of claim 5, wherein the heat radiation coating layer is formed to cover an upper surface of an uppermost magnetic layer among the magnetic layers.

8. The sheet of claim 7, wherein the heat radiation coating layer is formed to cover side surfaces of the magnetic layers.

9. The sheet of claim 1, wherein the heat radiation coating layer is directly formed on the surface of the magnetic layer.

10. A wireless power charging device, comprising:

a coil part; and

a sheet configured to shield against electromagnetic waves disposed on the coil part and comprising a magnetic layer and a heat radiation coating layer coating at least a portion of a surface of the magnetic layer.

11. The wireless power charging device of claim 10, wherein the heat radiation coating layer is formed to cover an upper surface of the magnetic layer.

12. The wireless power charging device of claim 10, wherein the heat radiation coating layer is formed to cover upper and side surfaces of the magnetic layer.

13. The wireless power charging device of claim 12, wherein the heat radiation coating layer extends to an upper surface of the coil part.

14. The wireless power charging device of claim 13, wherein the heat radiation coating layer is directly formed on the upper surface of the coil part.

15. The wireless power charging device of claim 10, wherein the heat radiation coating layer comprises graphene.

16. The wireless power charging device of claim 10, wherein the heat radiation coating layer is directly formed on the surface of the magnetic layer.

17. A sheet configured to shield a battery against electromagnetic waves, comprising:

a magnetic layer configured to generate heat and formed as one of an integral layer and crushed into multiple pieces; and

a heat radiation coating layer configured to radiate the heat from the magnetic layer and directly cover a portion of or an entire upper surface of the magnetic layer,

wherein the heat radiation coating layer extends to side surfaces of the magnetic layer.

18. The sheet of claim 17, wherein the magnetic layer comprises magnetic layers and the heat radiation coating layer is formed to cover an upper surface of an uppermost magnetic layer of the magnetic layers and side surfaces of the magnetic layers.

19. The sheet of claim 18, wherein an adhesive layer is interposed between the magnetic layers to adhere between the magnetic layers and to interlayer insulation between the magnetic layers.

20. The sheet of claim 17, wherein the heat radiation coating layer covers at least the portion of or the entire upper surface of the magnetic layer is thicker than a portion of the heat radiation coating layer covering the side surfaces of the magnetic layer.

21. The sheet of claim 17, wherein the heat radiation coating layer covers at least the portion of or the entire upper surface of the magnetic layer is thinner than a portion of the heat radiation coating layer covering the side surfaces of the magnetic layer.