Wireless power reception device

• US 10,148,134 B2
• Filed: 04/30/2014
• Issued: 12/04/2018
• Est. Priority Date: 05/02/2013
• Status: Active Grant

• Current Assignee: Nera Innovations Limited (Atlantic IP Services Limited)
• Original Assignee: LG Innotek Company Limited (LG Corporation)
• Inventors: Kim, Yang Hyun
• Primary Examiner(s): Fureman, Jared
• Assistant Examiner(s): Dominique, Emmanuel R
• Application Number:
  US14/888,658
• Publication Number:
  US 20160094049A1
• Time in Patent Office: 1,679 Days
• CPC Class Codes: H01F 27/2823 Wires H01F27/2866 takes precedence
• CPC Class Codes: H01F 27/363 made of electrically conductive material
• 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: H02J 50/90 involving detection or optimisation of position, e.g. alignment

Abstract

A wireless power reception device for wirelessly receiving electric power from a wireless power transmission device according to an embodiment of the present invention comprises: a magnetic body; a reception coil arranged on the magnetic body and coupled to a transmission coil of the wireless power transmission device to receive electric power; and a magnetic body saturation prevention unit arranged inside the reception coil to prevent the magnetic body from being saturated by an influence of an external magnetic field.

Claims

1. A wireless power receiver comprising:

a magnetic substance;

a reception coil disposed on the magnetic substance and configured to receive power;

a first magnetic substance saturation protective pattern disposed inside a center of the reception coil disposed on the magnetic substance; and

a second magnetic substance saturation protective pattern disposed inside the center of the reception coil disposed on the magnetic substance,

wherein the second magnetic substance saturation protective pattern is disposed at one side of the first magnetic substance saturation protective pattern,

wherein the first magnetic substance saturation protective pattern has a different shape than the second magnetic substance saturation protective pattern,

wherein the reception coil has a thickness of 0.1 mm, and a thickness of one electric wire constituting the reception coil is 0.6 mm, and an interval between wires constituting the reception coil is in a range of 0.12 mm to 0.14 mm,

wherein a ratio of an inside area of the reception coil to an area of the first and second magnetic substance saturation protective patterns is in a range of 0.204 to 0.716,

wherein an inner diameter of the reception coil is in a range of 25 mm to 60 mm, and the area of the first and second magnetic substance saturation protective patterns is in a range of 100 mm² to 2,025 mm², and

wherein the first and second magnetic substance saturation protective patterns include a metal pattern including at least one of copper, gold and silver.

2. The wireless power receiver of claim 1, wherein the first and second magnetic substance saturation protective patterns include an L pattern, a circular pattern, a rectangular pattern, a triangular pattern and a hexagonal pattern.

3. The wireless power receiver of claim 1, wherein an intensity of a magnetic field formed inside the reception coil is increased as an area of the first and second magnetic substance saturation protective patterns is enlarged.

4. The wireless power receiver of claim 1, wherein an intensity of a magnetic field formed inside the reception coil is increased as centers of the first and second magnetic substance saturation protective patterns approach a center of the inside of the reception coil.

5. The wireless power receiver of claim 1, wherein the first magnetic substance saturation protective pattern includes an L pattern disposed at a center of the inside of the reception coil, and the second magnetic substance saturation protective pattern includes a circular pattern disposed at one side of the L pattern.

6. The wireless power receiver of claim 5, wherein the circular pattern is disposed at a left lower end of the one side of the L pattern or is disposed at a center of the one side of the L pattern.

7. The wireless power receiver of claim 1, wherein the first magnetic substance saturation protective pattern includes an L pattern disposed at a center of the inside of the reception coil, and the second magnetic substance saturation protective pattern includes a rectangular pattern disposed at one side of the L pattern.

8. The wireless power receiver of claim 7, wherein the rectangular pattern is disposed at a left lower end of the one side of the L pattern or is disposed at a center of the one side of the L pattern.

9. The wireless power receiver of claim 1, wherein the first magnetic substance saturation protective pattern includes an L pattern disposed at a center of the inside of the reception coil, and the second magnetic substance saturation protective pattern includes a triangular pattern disposed at one side of the L pattern.

10. The wireless power receiver of claim 9, wherein the triangular pattern is disposed at a left lower end of the one side of the L pattern.

11. The wireless power receiver of claim 1, wherein the first magnetic substance saturation protective pattern includes an L pattern disposed at a center of the inside of the reception coil, and the second magnetic substance saturation protective pattern includes a hexagonal pattern disposed at one side of the L pattern.