Wireless power transmission/reception device

• US 10,547,215 B2
• Filed: 02/25/2016
• Issued: 01/28/2020
• Est. Priority Date: 03/05/2015
• Status: Active Grant

• Current Assignee: GE Hybrid Technologies, LLC
• Original Assignee: GE Hybrid Technologies, LLC
• Inventors: Jung, Chun Kil
• Primary Examiner(s): Donovan, Lincoln D
• Assistant Examiner(s): Almo, Khareem E
• Application Number:
  US15/555,544
• Publication Number:
  US 20180069440A1
• Time in Patent Office: 1,433 Days
• Field of Search: None
• CPC Class Codes: H01F 27/36 Electric or magnetic shields or screens movable for varying inductance H01F21/10
• 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 50/50 using additional energy repeaters between transmitting devices and receiving devices
• CPC Class Codes: H02J 50/70 involving the reduction of electric, magnetic or electromagnetic leakage fields
• CPC Class Codes: H02J 7/02 for charging batteries from ac mains by converters

Abstract

The present description relates to a wireless power transmission/reception device. The present description provides a magnetic field controlling member for focusing a magnetic field between a primary coil, which is connected to a power source of a wireless power transmission system and forms a magnetic field, and a secondary coil which is for receiving power by means of the magnetic field. The magnetic field controlling member includes: a substrate, between the primary coil and secondary coil, of which one side faces the primary coil or secondary coil; a pattern unit which is placed on the substrate and has a plurality of thin films that are positioned at a predetermined distance away from each other; and a connecting unit which electrically connects the plurality of thin films.

Claims

1. A magnetic field control member, for focusing a magnetic field between a primary coil connected to a power source of a wireless power transfer system and forming a magnetic field and a secondary coil receiving power through the magnetic field, the member comprising:

a substrate having one surface disposed between the primary coil and the secondary coil so as to face the primary coil or the secondary coil;

a pattern unit disposed over the substrate and comprising a plurality of thin films spaced apart from each other by a certain interval, wherein the plurality of thin films have a linear shape with the same length;

and a connection unit electrically connecting the plurality of thin films.

2. The magnetic field control member of claim 1, wherein the magnetic field control member allows a magnetic field formed from the primary coil to be focused on the secondary coil.

3. The magnetic field control member of claim 1, wherein the plurality of thin films are spaced from each other at the same interval.

4. The magnetic field control member of claim 1, wherein the interval of the plurality of thin films is about 1 mm.

5. The magnetic field control member of claim 1, wherein the pattern unit is formed of copper or a mixture or compound containing copper.

6. The magnetic field control member of claim 1, wherein the connection unit electrically connects one ends of the plurality of thin films to each other.

7. The magnetic field control member of claim 1, wherein the connection unit electrically connects both ends of the plurality of thin films to each other.

8. The magnetic field control member of claim 1, wherein the connection unit is electrically connected by a conductive material formed of one of gold, copper, and aluminum, or a mixture of two or more thereof.

9. A wireless power transmitter comprising:

a transmitting antenna forming a magnetic field; and

a magnetic field control member having one surface thereof facing the transmitting antenna or a wireless power receiver that receives power through the magnetic field, wherein the magnetic field control member comprises;

a substrate;

a pattern unit formed over the substrate and comprising a plurality of thin films spaced apart from each other by a certain interval, wherein the plurality of thin films have a linear shape with the same length; and

a connection unit electrically connecting the plurality of thin films.

11. The wireless power transmitter of claim 9, wherein the magnetic field control member allows a magnetic field formed from the primary coil to be focused on the secondary coil.

12. The wireless power transmitter of claim 9, wherein the certain interval of the plurality of thin films is about 1 mm.

10. A wireless power receiver comprising:

a receiving antenna for receiving power through a magnetic field formed from a wireless power transmitter; and

a magnetic field control member having one surface thereof facing the receiving antenna or a wireless power transmitter, wherein the magnetic field control member comprises;

a substrate;

a pattern unit formed over the substrate and comprising a plurality of thin films spaced apart from each other by a certain interval, wherein the plurality of thin films have a linear shape with the same length; and

a connection unit electrically connecting the plurality of thin films.

13. The wireless power receiver of claim 10, wherein the magnetic field control member allows a magnetic field formed from the primary coil to be focused on the secondary coil.

14. The wireless power receiver of claim 10, wherein the certain interval of the plurality of thin films is about 1 mm.

15. A magnetic field control member, comprising:

a substrate for use in a magnetic field path between a primary coil of a wireless power transmitter and a secondary coil of a wireless power receiver; and

a plurality of linear shape films electrically coupled to each other and disposed over at least one surface of the substrate, the plurality of linear shape films arranged in a side by side pattern and spaced apart from each other by a same interval.

16. The magnetic field control member of claim 15, wherein the magnetic field control member is configured to focus a magnetic field radiated from the primary coil to the secondary coil when placed in the magnetic field path between the wireless power transmitter and the wireless power receiver.

17. The magnetic field control member of claim 15, wherein the magnetic field control member is configured to increase a distance of magnetic resonance wireless power transfer from the primary coil to the secondary coil.