Wireless power transmission apparatus

• US 10,483,769 B1
• Filed: 12/07/2018
• Issued: 11/19/2019
• Est. Priority Date: 09/30/2014
• Status: Active Grant

• Current Assignee: LG Innotek Company Limited (LG Corporation)
• Original Assignee: LG Innotek Company Limited (LG Corporation)
• Inventors: Bae, Su Ho, Yong, Dong Ho
• Primary Examiner(s): Cole, Brandon S
• Application Number:
  US16/213,542
• Time in Patent Office: 347 Days
• Field of Search: 307 89-111
• 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 50/23 characterised by the type of transmitting antennas, e.g. directional array antennas or Yagi antennas
• CPC Class Codes: H02J 50/70 involving the reduction of electric, magnetic or electromagnetic leakage fields
• CPC Class Codes: H02J 7/0042 characterised by the mechanical construction

Abstract

A wireless power transmission apparatus can include a member; an upper transmission coil disposed on the member; and first and second terminals disposed in the member, in which the upper transmission coil includes an outer coil part connected to the first terminal and formed in one-turn; a first inner coil part connected to the outer coil part and having a half-turn on a first region of the member; a second inner coil part connected to the first inner coil part and having a half-turn on a second region of the member; a third inner coil part connected to the second inner coil part and having a half-turn on the first region of the member; and a fourth inner coil part connected to the third inner coil part and the second terminal and having a half-turn on the second region of the member, in which the half-turn of the second inner coil part comprises a first rounded corner, a second rounded corner and a third rounded corner, a circular arc of the first rounded corner of the second inner coil part is R 20 mm as a radius of a circle, a circular arc of the second rounded corner of the second inner coil part is R 18.4 mm as a radius of a circle, and a circular arc of the third rounded corner of the second inner coil part is greater than the circular arc of the first and second rounded corners of the second inner coil part.

Claims

1. A wireless power transmission apparatus comprising:

a member;

an upper transmission coil disposed on the member; and

first and second terminals disposed in the member,

wherein the upper transmission coil comprises;

an outer coil part connected to the first terminal and formed in one-turn;

a first inner coil part connected to the outer coil part and having a half-turn on a first region of the member;

a second inner coil part connected to the first inner coil part and having a half-turn on a second region of the member;

a third inner coil part connected to the second inner coil part and having a half-turn on the first region of the member; and

a fourth inner coil part connected to the third inner coil part and the second terminal and having a half-turn on the second region of the member,

wherein the half-turn of the second inner coil part comprises a first rounded corner, a second rounded corner and a third rounded corner,

wherein a circular arc of the first rounded corner of the second inner coil part is R 20 mm as a radius of a circle,

wherein a circular arc of the second rounded corner of the second inner coil part is R 18.4 mm as a radius of a circle, and

wherein a circular arc of the third rounded corner of the second inner coil part is greater than the circular arc of the first and second rounded corners of the second inner coil part.

2. The wireless power transmission apparatus of claim 1,

wherein the half-turn of the third inner coil part comprises a first rounded corner, a second rounded corner, and a third rounded corner,

wherein a circular arc of the first rounded corner of the third inner coil part is R 17 mm as a radius of a circle, and

wherein a circular arc of the second rounded corner of the third inner coil part is R 15.4 mm as a radius of a circle,

wherein a circular arc of the third rounded corner of the third inner coil part is greater than the circular arc of the first and second rounded corners of the third inner coil part.

3. The wireless power transmission apparatus of claim 1,

wherein the circular arc of the third rounded corner of the second inner coil part is R 270.8 mm as a radius of a circle, and

wherein the circular arc of the third rounded corner of the third inner coil part is R 162.56 mm as a radius of a circle.

4. The wireless power transmission apparatus of claim 1,

wherein a width of the second inner coil part in a first direction is 140.3 mm, and

wherein a width of the third inner coil part in the first direction is 107.9 mm.

5. The wireless power transmission apparatus of claim 1,

wherein the one-turn of the outer coil part includes four rounded corners of a circular shape.

6. The wireless power transmission apparatus of claim 5,

wherein a circular arc of one of the four rounded corners is R 30.2 mm as a radius of a circle.

7. The wireless power transmission apparatus of claim 5,

wherein a first width of the outer coil part in a first direction is 179.5 mm, and

wherein a second width of the outer coil part in a second direction is 128 mm.

8. The wireless power transmission apparatus of claim 1,

wherein a circular arc of the fourth inner coil part is R 15.1 mm as a radius of circle.

9. The wireless power transmission apparatus of claim 8,

wherein a first width of the fourth inner coil part is 24.4 mm.

10. The wireless power transmission apparatus of claim 1,

wherein a first width of the first coil part in a first direction is 174.3 mm, and

wherein a second width of the first inner coil part in a second direction is 122.8 mm.

11. The wireless power transmission apparatus of claim 1,

wherein a first distance between the outer coil part and the first inner coil part is 5.2 mm, wherein a second distance between the first inner coil part and the second inner coil part is 34 mm,

wherein a third distance between the second inner coil part and the third inner coil part is 32.4 mm, and

wherein a fourth distance between the third inner coil part and the fourth inner coil part is 83.5 mm.

12. The wireless power transmission apparatus of claim 1, comprising:

a lower transmission coil disposed under the member,

wherein the lower transmission coil is horizontally symmetrical to the upper transmission coil with respect to the central axis.

13. The wireless power transmission apparatus of claim 12, wherein a thickness of the upper and lower transmission coil each is 0.05 mm.

14. The wireless power transmission apparatus of claim 12, comprising:

an outer connection part connecting the outer coil part and the first terminal; and

an inner connection part connecting the fourth inner coil part and the second terminal.

15. The wireless power transmission apparatus of claim 14,

wherein the upper transmission coil further comprises:

a first extension part connecting the outer coil part and the first inner coil part and disposed across the boundary between the first and second regions of the member;

a second extension part connecting the first inner coil part and the second inner coil part and disposed across the boundary between the first and second regions of the member;

a third extension part connecting the second inner coil part and the third inner coil part and disposed across the boundary between the first and second regions of the member; and

a fourth extension part connecting the third inner coil part and the fourth inner coil part and disposed across the boundary between the first and second regions of the member.

16. The wireless power transmission apparatus of claim 15, wherein the second extension part of the upper transmission coil and a second extension part of the lower transmission coil cross with each other.

17. The wireless power transmission apparatus of claim 15, wherein a distance between a terminated point of the second extension part of the upper transmission coil and a terminated point of a second extension part of the lower transmission coil is 10.29 mm.

18. The wireless power transmission apparatus of claim 15, wherein the outer connection part and the third extension part are disposed in parallel with each other.