Heat dissipation unit for wireless charging and wireless power charging module comprising same

• US 10,334,752 B2
• Filed: 03/22/2016
• Issued: 06/25/2019
• Est. Priority Date: 04/02/2015
• Status: Active Grant

• Current Assignee: Amogreentech Co., Ltd.
• Original Assignee: Amogreentech Co., Ltd.
• Inventors: Shin, Hwi Chul, Kim, Jong Eun, Seo, Jae Hyung
• Primary Examiner(s): Patel, Mukundbhai G
• Application Number:
  US15/563,935
• Publication Number:
  US 20180132376A1
• Time in Patent Office: 1,190 Days
• CPC Class Codes: H01F 27/22 Cooling by heat conduction through solid or powdered fillings
• 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: H01Q 1/02 Arrangements for de-icing; Arrangements for drying-out ; Arrangements for cooling; Arrangements for preventing corrosion
• CPC Class Codes: H01Q 1/22 by structural association with other equipment or articles
• CPC Class Codes: H02J 50/10 using inductive coupling
• CPC Class Codes: H02J 7/00034 Charger exchanging data with an electronic device, i.e. telephone, whose internal battery is under charge
• CPC Class Codes: H02J 7/02 for charging batteries from ac mains by converters
• CPC Class Codes: H04B 5/72 for local intradevice communication
• CPC Class Codes: H04B 5/79 for data transfer in combination with power transfer
• CPC Class Codes: H05K 7/20 Modifications to facilitate cooling, ventilating, or heating

Abstract

Provided are a heat dissipation unit for wireless charging and a wireless power charging module comprising the same. The heat dissipation unit for wireless charging, according to one exemplary embodiment of the present invention, is formed of a plate-shaped substrate layer having a predetermined area to discharge to the outside heat occurring during wireless charging, and comprises at least one slot having a predetermined length. By having at least one slot, the present invention can satisfy all properties required in a wireless charging method, which are charging efficiency and a heat dissipation effect.

Claims

1. A heat dissipation unit for wireless charging, comprising:

a sheet-shaped base layer through which heat generated during wireless charging is discharged outwardly, the base layer having at least one slot,

wherein the slot extends in a direction orthogonal to a pattern of an antenna for wireless charging,

wherein the slot is formed in central portions of the base layer without extending to edges of the base layer, and

wherein the slot is disposed concentrically at some positions corresponding to a pattern of an antenna for wireless charging, except for an area corresponding to an application processor to improve a heat dissipation characteristic.

2. The heat dissipation unit of claim 1, wherein the slot is disposed at a position corresponding to a pattern of an antenna for wireless charging, except for an area corresponding to an application processor to improve a heat dissipation characteristic.

3. The heat dissipation unit of claim 1, wherein the slot extends through top and bottom of the base layer.

4. The heat dissipation unit of claim 1, wherein the slot extends to an edge of the base layer.

5. The heat dissipation unit of claim 1, wherein the base layer has a through-hole in a central portion thereof, and the slot extends to the through-hole or extends from the through-hole to an edge of the base layer.

6. The heat dissipation unit of claim 1, wherein the base layer is made of one selected from among Cu, Al, graphite, and combinations thereof.

7. The heat dissipation unit of claim 1, further comprising:

a heat conductive adhesive disposed on at least one surface of a top surface and a bottom surface of the base layer.

8. The heat dissipation unit of claim 1, further comprising:

an oxide film disposed on at least one surface of a top surface and a bottom surface of the base layer.

9. A wireless power charging module, comprising:

at least one antenna unit;

a shielding unit disposed on a surface of the antenna unit to induce a magnetic field; and

a heat dissipation unit comprising a sheet-shaped base layer disposed on a surface of the shielding unit to discharge heat,

wherein the base layer has at least one slot,

wherein the slot extends in a direction orthogonal to a pattern of the antenna of the antenna unit,

wherein the slot is formed in central portions of the base layer without extending to edges of the base layer, and

wherein the slot is disposed concentrically at some positions corresponding to a pattern of an antenna for wireless charging, except for an area corresponding to an application processor to improve a heat dissipation characteristic.

10. The wireless power charging module of claim 9, wherein the antenna unit comprises at least one of a wireless charging antenna, a near field communication (NFC) antenna, and a magnetic secure transmission (MST) antenna.

11. The wireless power charging module of claim 10, wherein the shielding unit comprises a first sheet layer for improving a characteristic of the wireless charging antenna and a second sheet layer for improving a characteristic of the NFC antenna.

12. The wireless power charging module of claim 11, wherein the first sheet layer is a ribbon sheet made of an amorphous alloy or a nano-crystalline alloy, and the second sheet layer is a ferrite sheet.

13. The wireless power charging module of claim 11, wherein at least one of the first sheet layer and the second sheet layer is comprised of a plurality of fine pieces divided into irregular shapes, adjacent fine pieces among the plurality of fine pieces being totally insulated or partially insulated from each other.

14. A heat dissipation unit for wireless charging, comprising:

a metal thin film,

wherein the metal thin film sheet includes an oxide film layer disposed on one surface or both surfaces to improve high-resistance properties and emissivity of the surfaces,

wherein the metal thin film sheet has at least one slot,

wherein the heat dissipation unit is installed in a shielding unit of a wireless power charging module to dissipate heat generated from a heat source,

wherein the slot extends in a direction orthogonal to a pattern of an antenna for wireless charging,

wherein the slot is formed in central portions of the base layer without extending to edges of the base layer, and

wherein the slot is disposed concentrically at some positions corresponding to a pattern of an antenna for wireless charging, except for an area corresponding to an application processor to improve a heat dissipation characteristic.

15. The wireless power charging module of claim 14, wherein the metal thin film sheet is a copper foil.

16. The wireless power charging module of claim 14, wherein the slot is disposed at a position corresponding to a pattern of an antenna for wireless charging, except for an area corresponding to an application processor (AP) to improve a heat dissipation characteristic.