Wireless power transmitter and wireless power receiver

• US 9,997,292 B2
• Filed: 07/09/2012
• Issued: 06/12/2018
• Est. Priority Date: 07/26/2011
• Status: Active Grant

• Current Assignee: Nera Innovations Limited (Atlantic IP Services Limited)
• Original Assignee: LG Innotek Company Limited (LG Corporation)
• Inventors: An, Jeong Wook
• Primary Examiner(s): Barnie, Rexford
• Assistant Examiner(s): Parries, Dru
• Application Number:
  US14/235,318
• Publication Number:
  US 20140145518A1
• Time in Patent Office: 2,164 Days
• Field of Search: 307104
• CPC Class Codes: H01F 27/363 made of electrically conductive 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 50/12 of the resonant type
• CPC Class Codes: H02J 50/70 involving the reduction of electric, magnetic or electromagnetic leakage fields

Abstract

A wireless power receiver for wirelessly receiving power from a wireless power transmitter according to the embodiment includes a reception coil part resonance-coupled with the wireless power transmitter to receive the power, and an eddy current prevention part disposed at one side of the reception coil part to prevent an eddy current from being generated from the wireless power receiver caused by a magnetic field generated from the reception coil part.

Claims

1. A wireless power receiver for wirelessly receiving power from a wireless power transmitter, the wireless power receiver comprising:

a reception coil part resonance-coupled with the wireless power transmitter to receive the power;

a metallic shielding part disposed on the reception coil part for shielding a magnetic field generated from the reception coil part, the metallic shielding part including a horizontal part and first and second vertical parts bent from both ends of the horizontal part, and the reception coil part being disposed between the first and second vertical parts;

a plating layer including first to third portions that contact an inner surface of the horizontal part and inner side surfaces of the first and second vertical parts; and

a magnet including a first portion between the first portion of the plating layer and an upper portion of the reception coil part, a second portion between the second portion of the plating layer and a first side of the reception coil part, and a third portion between the third portion of the plating layer and a second side of the reception coil part,

wherein the plating layer includes zinc, and the magnet includes sendust or ferrite,

wherein the magnet has a thickness of less than 1 mm,

wherein the first portion of the plating layer corresponding to the horizontal part is thicker than one of the second and third portions of the plating layer corresponding to the first and second vertical parts, and

wherein the first to third portions of the magnet are spaced apart from the first to third portions of the plating layer, respectively.

2. The wireless power receiver of claim 1, wherein the plating layer is formed through an electro-galvanizing process or a hot dip galvanizing process.

3. The wireless power receiver of claim 1, wherein the reception coil part comprises:

a reception resonant coil resonance-coupled with the wireless power transmitter to receive the power; and

a reception induction coil inductively coupled with the reception resonant coil to receive the power.

4. The wireless power receiver of claim 1, wherein the plating layer is disposed on an entire surface of the metallic shielding part.

5. A wireless power transmitter for wirelessly transmitting power to a wireless power receiver, the wireless power transmitter comprising:

a transmission coil part resonance-coupled with the wireless power receiver to transmit the power;

a metallic shielding part disposed on the reception coil part for shielding a magnetic field generated from the reception coil part, the metallic shielding part including a horizontal part and first and second vertical parts bent from both ends of the horizontal part, and the reception coil part being disposed between the first and second vertical parts;

a plating layer including first to third portions that contact an inner surface of the horizontal part and inner side surfaces of the first and second vertical parts; and

a magnet including a first portion between the first portion of the plating layer and an upper portion of the reception coil part, a second portion between the second portion of the plating layer and a first side of the reception coil part, and a third portion between the third portion of the plating layer and a second side of the reception coil part,

wherein the plating layer includes zinc, and the magnet includes sendust or ferrite,

wherein the magnet has a thickness of less than 1 mm,

wherein the first portion of the plating layer corresponding to the horizontal part is thicker than one of the second and third portions of the plating layer corresponding to the first and second vertical parts, and

wherein the first to third portions of the magnet are spaced apart from the first to third portions of the plating layer, respectively.

6. The wireless power transmitter of claim 5, wherein the plating layer is disposed on an entire surface of the metallic shielding part.