HEAT RADIATION UNIT AND WIRELESS POWER TRANSMITTING AND RECEIVING DEVICE HAVING SAME

• US 20170345555A1
• Filed: 01/08/2016
• Published: 11/30/2017
• Est. Priority Date: 01/12/2015
• Status: Active Grant

• Current Assignee: Amogreentech Co., Ltd.
• Original Assignee: Amogreentech Co., Ltd.
• Inventors: JANG, Kil Jae, LEE, Dong Hoon, HWANG, Seung Jae, CHANG, Min Sik, SHIN, Hwi Chul
• Granted Patent: US 10,332,672 B2
• Time in Patent Office: Days
• CPC Class Codes: B32B 15/04 comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material next to a bituminous or tarry layer B32B11/08; next to a water-setting substance layer B32B13/06; next to a glass layer B32B17/061; next to a cellulosic plastic layer B32B23/042
• CPC Class Codes: B32B 2307/302 Conductive
• CPC Class Codes: B32B 2309/105 Thickness
• CPC Class Codes: B32B 7/12 using interposed adhesives or interposed materials with bonding properties
• CPC Class Codes: H01F 27/22 Cooling by heat conduction through solid or powdered fillings
• CPC Class Codes: H01F 27/2876 Cooling cooling transformers and inductances in general H01F27/08
• 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: H04B 5/26 using coils
• CPC Class Codes: H04B 5/43 Antennas
• CPC Class Codes: H04B 5/79 for data transfer in combination with power transfer

Abstract

Provided is a heat radiation unit for radiating heat generated during operation of a wireless power transmitting or receiving device and includes a plurality of thermally conductive metal layers stacked in two or more layers and an adhesive layer for attaching the thermally conductive metal layers, to prevent lowering of the charging efficiency and improve the heat radiation performance.

Claims

1. A heat radiation unit that radiates heat generated during an operation of a wireless power transmitting device, the heat radiation unit comprising:

a plurality of thermally conductive metal layers stacked in two or more layers; and

at least one adhesive layer for attaching between the plurality of the thermally conductive metal layers.

2. The heat radiation unit of claim 1, wherein the plurality of thermally conductive metal layers are formed of Cu, Ag, Ni, Al, or an alloy thereof.

3. The heat radiation unit of claim 1, wherein the plurality of thermally conductive metal layers are formed to have an identical thickness.

4. The heat radiation unit of claim 1, wherein each of the adhesive layers is formed of an adhesive layer containing a thermally conductive material.

5. The heat radiation unit of claim 4, wherein the thermally conductive material comprises any one of a thermally conductive metal powder, a thermally conductive carbon, a thermally conductive carbon black, a carbon nanotube (CNT), and a conductive polymer (PDOT).

6. A wireless power transmitting device comprising:

a wireless power transmission coil;

a shielding unit for shielding a magnetic field generated in the wireless power transmission coil; and

the heat radiation unit according to claim 1, for radiating heat generated in the wireless power transmission coil.

7. The wireless power transmitting device of claim 6, wherein the shielding unit and the heat radiation unit are mutually laminated by a second adhesive layer to then be integrally formed.

8. The wireless power transmitting device of claim 6, wherein the shielding unit comprises a first shielding sheet and a second shielding sheet in which different magnetic sheets having different resistivities are stacked.

9. The wireless power transmitting device of claim 8, wherein the first shielding sheet employs a ribbon sheet of an amorphous alloy or a ribbon sheet of a nanocrystalline alloy.

10. The wireless power transmitting device of claim 8, wherein the second shielding sheet employs a ferrite sheet or a polymer sheet.

11. The wireless power transmitting device of claim 10, wherein the ferrite sheet employs Ni—

Zn ferrite or Mn—

Zn ferrite.

12. The wireless power transmitting device of claim 8, wherein the first shielding sheet has a thickness of 20 μ

m to 300 μ

m, and the second shielding sheet has a thickness of 30 μ

m to 500 μ

m.

13. The wireless power transmitting device of claim 8, wherein the first shielding sheet and the second shielding sheet may be attached by a third adhesive layer, and a protective cover is laminated on one surface of the first shielding sheet by a fourth adhesive layer.

14. The wireless power transmitting device of claim 8, wherein the first shielding sheet and the second shielding sheet are formed into a plurality of minute pieces, in a separate form, respectively.

15. A wireless power receiving device comprising:

a wireless power reception coil;

a shielding unit for shielding a magnetic field generated in the wireless power reception coil; and

a heat radiation unit according to claim 1, for radiating heat generated in the wireless power reception coil.

16. The wireless power receiving device of claim 15, wherein the shielding unit and the heat radiation unit are mutually laminated by a second adhesive layer to then be integrally formed.

17. The wireless power receiving device of claim 15, wherein the shielding unit comprises a first shielding sheet and a second shielding sheet in which different magnetic sheets having different resistivities are stacked.

18. The wireless power receiving device of claim 17, wherein the first shielding sheet employs a ribbon sheet of an amorphous alloy or a ribbon sheet of a nanocrystalline alloy.

19. The wireless power receiving device of claim 17, wherein the second shielding sheet employs a ferrite sheet or a polymer sheet.

20. The wireless power receiving device of claim 17, wherein the first shielding sheet has a thickness of 20 μ

m to 300 μ

m, and the second shielding sheet has a thickness of 30 μ

m to 500 μ

m, and wherein the first shielding sheet and the second shielding sheet are formed into a plurality of minute pieces, in a separate form, respectively.