Wireless power transmission apparatus

• US 10,193,352 B2
• Filed: 08/20/2015
• Issued: 01/29/2019
• 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:
  US14/831,685
• Publication Number:
  US 20160094045A1
• Time in Patent Office: 1,258 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 is described that comprises a mounting member, an upper transmission coil disposed on the mounting member, and first and second terminals disposed in the mounting member. The upper transmission coil comprises an outer coil part connected to the first terminal and formed in one-turn with respect to a central axis between the first and second terminals, a first inner coil part connected to the outer coil part and formed in a half-turn on a first side of the central axis, a second inner coil part connected to the first inner coil part, formed in a half-turn on a second side of the central axis, a third inner coil part connected to the second inner coil part, formed in a half-turn on the first side of the central axis, and a fourth inner coil part connected to the third inner coil part and the second terminal, formed in a half-turn on the second side of the central axis.

Claims

1. A wireless power transmission apparatus comprising:

a mounting member;

an upper transmission coil disposed on the mounting member; and

first and second terminals disposed in the mounting member,

wherein the upper transmission coil comprises;

an outer coil part connected to the first terminal and formed in one-turn with respect to a central axis between the first and second terminals;

a first inner coil part connected to the outer coil part and formed in a half-turn on a first side of the central axis;

a second inner coil part connected to the first inner coil part, formed in a half-turn on a second side of the central axis;

a third inner coil part connected to the second inner coil part, formed in a half-turn on the first side of the central axis; and

a fourth inner coil part connected to the third inner coil part and the second terminal, formed in a half-turn on the second side of the central axis,

wherein the one-turn of the outer coil includes a rectangular shape with rounded corners or a circular shape, and

wherein the half-turn of the first, second and third inner coil parts includes two rounded corners of a rectangular shape or one half or less of a circular shape.

2. The wireless power transmission apparatus of claim 1, wherein the upper transmission coil further comprises:

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.

3. The wireless power transmission apparatus of claim 2, wherein the inner connection part is connected to the second terminal by passing a top surface and then a bottom surface of the mounting member through a connection.

4. The wireless power transmission apparatus of claim 2, wherein the upper transmission coil further comprises:

a first extension part connecting the outer coil part and the first inner coil part while intersecting the central axis;

a second extension part connecting the first inner coil part and the second inner coil part while intersecting the central axis;

a third extension part connecting the second inner coil part and the third inner coil part while extending in parallel to the central axis; and

a fourth extension part connecting the third inner coil part and the fourth inner coil part while intersecting the central axis.

5. The wireless power transmission apparatus of claim 4, wherein the upper transmission coil comprises stepped portions formed by the first extension part, the second extension part, the third extension part and the fourth extension part,

wherein a top surface of the mounting member is divided into first, second, third and fourth quadrants,

wherein the one-turn of the outer coil extends clockwise through the first, second, third and fourth quadrants without stepped portion, and

wherein the half-turn of the first, second and third inner coil parts extends clockwise through two adjacent quadrants among the first, second, third and fourth quadrants without stepped portion.

6. The wireless power transmission apparatus of claim 1, wherein a width, in a direction of the central axis, of the outer coil part is about 180.5 mm, a width, in the direction of the central axis, of the first inner coil part is about 174.3 mm, a width, in the direction of the central axis, of the second inner coil part is about 140.3 mm, a width, in the direction of the central axis, of the third inner coil part is about 107.9 mm, and a width, in the direction of the central axis, of the fourth inner coil part is about 24.4 mm.

7. The wireless power transmission apparatus of claim 1, wherein a length of the mounting member is about 180.5 mm, a width of the mounting member is about 129.0 mm, and a thickness of the mounting member is about 0.80 mm.

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

a lower transmission coil disposed under the mounting member and connected to the first and second terminals,

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

9. The wireless power transmission apparatus of claim 1, wherein the second inner coil part has a shorter length than the first inner coil part, the third inner coil part has a shorter length than the second inner coil part, and the fourth inner coil part has a shorter length than the third inner coil part.

10. The wireless power transmission apparatus of claim 1, wherein the one-turn of the outer coil includes first, second, third and fourth rounded corners arranged in a clockwise direction, and the first rounded corner is disposed closer to the first terminal than the second, third and fourth rounded corners, and

wherein the one-turn of the outer coil further includes:

a first continuously straight section connecting the first rounded corner and the second rounded corner without a stepped portion between the first and second rounded corners,

a second continuously straight section connecting the second rounded corner and the third rounded corner without a stepped portion between the second and third rounded corners, and

a third continuously straight section connecting the third rounded corner and the fourth rounded corner without a stepped portion between the third and fourth rounded corners.

11. The wireless power transmission apparatus of claim 1, wherein the one-turn of the outer coil includes the rectangular shape with rounded corners, and

wherein the half-turn of the first, second and third inner coil parts includes the two rounded corners of the rectangular shape.

12. The wireless power transmission apparatus of claim 11, wherein the fourth inner coil part includes one half or less of a circular shape that is different from the rectangular shapes of the one-turn of the outer coil and the half-turn of the first, second and third inner coil parts.

13. The wireless power transmission apparatus of claim 1, wherein the one-turn of the outer coil includes the circular shape, and

wherein the half-turn of the first, second and third inner coil parts includes the one half or less of the circular shape.

14. The wireless power transmission apparatus of claim 1, wherein a first end of the third extension part and one end of the second inner coil part form a 90 degree angle, and

wherein a second end of the third extension part opposite to the first end of the third extension part and one end of the third inner coil part form a 90 degree angle.

15. A wireless power transmission apparatus comprising:

a mounting member;

an upper transmission coil disposed on the mounting member; and

first and second terminals disposed in the mounting member,

wherein the upper transmission coil comprises;

an outer connection part extending from the first terminal in a first direction parallel to a central axis or a Y axis between the first and second terminals on a right side of the mounting member;

an outer coil part extending from the outer connection part and formed in one-turn to be horizontally symmetrical with respect to the mounting member;

a first extension part extending from the outer coil part while intersecting the Y axis in a direction from a left side to the right side of the mounting member;

a first inner coil part extending from the first extension part and formed in a half-turn on the right side of the mounting member;

a second extension part extending from the first inner coil part while intersecting the Y axis in a direction from the right side to the left side of the mounting member;

a second inner coil part extending from the second extension part and formed in a half-turn on the left side of the mounting member;

a third extension part extending from the second inner coil part in the first direction parallel to the Y axis on the right side of the mounting member;

a third inner coil part extending from the third extension part and formed in a half-turn on the right side of the mounting member;

a fourth extension part extending from the third inner coil part while intersecting the Y axis in the direction from the right side to the left side of the mounting member;

a fourth inner coil part extending from the fourth extension part and formed in a half-turn on the left side of the mounting member; and

an inner connection part extending in a second direction parallel to the Y axis on the left side of the mounting member.

16. The wireless power transmission apparatus of claim 15, wherein:

a top surface of the mounting member is divided into first, second, third and fourth quadrants by the Y axis and an X axis that is perpendicular to the Y axis;

wherein the outer coil part comprises;

first, second, third and fourth outer coil parts formed integrally and disposed in the first, second, third and fourth quadrants, respectively;

the first outer coil part extends from a terminated point of the outer connection part in a positive X axis direction in parallel to the X axis and then extends in a negative Y axis direction in parallel to the Y axis, wherein the first outer coil part changes its direction from the positive X axis direction to the negative Y axis direction with a first curvature;

the second outer coil part extends from a terminated point of the first outer coil part in the negative Y axis direction in parallel to the Y axis and then extends in a negative X axis direction in parallel to the X axis, wherein the second outer coil part changes its direction from the negative Y axis direction to the negative X axis direction with a second curvature;

the third outer coil part is symmetrical to the second outer coil part with respect to the Y axis; and

the fourth outer coil part is symmetrical to the first outer coil part with respect to the Y axis.

17. The wireless power transmission apparatus of claim 16, wherein the first curvature and the second curvature are identical.

18. The wireless power transmission apparatus of claim 17, wherein:

the first inner coil part comprises first and second inner coil parts formed integrally and disposed in the first and second quadrants, respectively;

the first inner coil part extends in the positive X axis direction in parallel to the X axis and then extends in the negative Y axis direction in parallel to the Y axis,

wherein the first inner coil part changes its direction from the positive X axis direction to the negative Y axis direction with a third curvature; and

the second inner coil part extends in the negative Y axis direction in parallel to the Y axis and then extends in the negative X axis direction in parallel to the X axis,

wherein the second inner coil part changes its direction from the negative Y axis direction to the negative X axis direction with a fourth curvature.

19. The wireless power transmission apparatus of claim 18, wherein the third curvature and the fourth curvature are identical.

20. The wireless power transmission apparatus of claim 19, wherein:

the second inner coil part comprises third and fourth inner coil parts formed integrally and disposed in the third and fourth quadrants, respectively;

the third inner coil part extends from a terminated point of the second extension part in the negative X axis direction in parallel to the X axis and then extends in the positive Y axis direction with a vertical distance thereof from the Y axis gradually increasing,

wherein the third inner coil part changes its direction from the negative X axis direction to the positive Y axis direction with a fifth curvature; and

the fourth inner coil part extends from a terminated point of the third inner coil part in the positive Y axis direction with a vertical distance thereof from the Y axis gradually decreasing and then extends in the positive X axis direction in parallel to the X axis,

wherein the fourth inner coil part changes its direction from the positive Y axis direction to the positive X axis direction with a sixth curvature.

21. The wireless power transmission apparatus of claim 20, wherein the fifth curvature and the sixth curvature are identical.

22. The wireless power transmission apparatus of claim 21, wherein:

the third inner coil part comprises fifth and sixth inner coil parts formed integrally and disposed in the first and second quadrants, respectively;

the fifth inner coil part extends in the positive X axis direction in parallel to the X axis and then extends in the negative Y axis direction with a vertical distance thereof from the Y axis gradually increasing,

wherein the fifth inner coil part changes its direction from the positive X axis direction to the negative Y axis direction with a seventh curvature; and

the sixth inner coil part extends in the negative Y axis direction with a vertical distance thereof from the Y axis gradually decreasing and then extends in the negative X axis direction in parallel to the X axis, wherein the sixth inner coil part changes its direction from the negative Y axis direction to the negative X axis direction with an eighth curvature.

23. The wireless power transmission apparatus of claim 22, wherein the seventh curvature and the eighth curvature are identical.

24. The wireless power transmission apparatus of claim 23, wherein:

the fourth inner coil part comprises seventh and eighth inner coil parts disposed in the third and fourth quadrants, respectively;

the seventh inner coil part extends in the negative X axis direction and then in the positive Y axis direction and has a ninth curvature as a whole; and

the eighth inner coil part extends in the positive Y axis direction and then in the positive X axis direction and has a tenth curvature as a whole.

25. The wireless power transmission apparatus of claim 24, wherein the ninth curvature and the tenth curvature are identical.

26. The wireless power transmission apparatus of claim 25, wherein a radius of the first and second curvatures is larger than a radius of the third and fourth curvatures, the radius of the third and fourth curvatures is larger than a radius of the fifth and sixth curvatures, the radius of the fifth and sixth curvatures is larger than a radius of the seventh and eighth curvatures, and the radius of the seventh and eighth curvatures is larger than a radius of the ninth and tenth curvatures.

27. The wireless power transmission apparatus of claim 26, further comprising:

a lower transmission coil disposed under the mounting member and connected to the first and second terminals,

wherein the lower transmission coil comprises;

an outer connection part symmetrical to the outer connection part of the upper transmission coil with respect to the Y axis;

a first extension part symmetrical to the first extension part of the upper transmission coil with respect to the Y axis;

a first inner coil part symmetrical to the first inner coil part of the upper transmission coil with respect to the Y axis;

a second extension part symmetrical to the second extension part of the upper transmission coil with respect to the Y axis;

a second inner coil part symmetrical to the second inner coil part of the upper transmission coil with respect to the Y axis;

a third extension part symmetrical to the third extension part of the upper transmission coil with respect to the Y axis;

a third inner coil part symmetrical to the third inner coil part of the upper transmission coil with respect to the Y axis;

a fourth extension part symmetrical to the fourth extension part of the upper transmission coil with respect to the Y axis;

a fourth inner coil part symmetrical to the fourth inner coil part of the upper transmission coil with respect to the Y axis; and

an inner connection part symmetrical to the inner connection part of the upper transmission coil with respect to the Y axis.

28. The wireless power transmission apparatus of claim 27, wherein a distance, in a direction of the X axis, between the inner connection part of the upper transmission coil and the inner connection part of the lower transmission coil is about 2.6 mm.

29. The wireless power transmission apparatus of claim 28, wherein a distance, in the direction of the X axis, between a starting point of the second extension part of the upper transmission coil and a starting point of the second extension part of the lower transmission coil is about 7.04 mm.

30. The wireless power transmission apparatus of claim 29, wherein a distance, in the direction of the X axis, between a terminated point of the second extension part of the upper transmission coil and a terminated point of the second extension part of the lower transmission coil is about 10.29 mm.

31. The wireless power transmission apparatus of claim 15, wherein the upper transmission coil comprises stepped portions formed by the first extension part, the second extension part, the third extension part and the fourth extension part,

wherein a top surface of the mounting member is divided into first, second, third and fourth quadrants,

wherein the one-turn of the outer coil extends clockwise through the first, second, third and fourth quadrants without stepped portion, and

wherein the half-turn of the first, second and third inner coil parts extends clockwise through two adjacent quadrants among the first, second, third and fourth quadrants without step portion.

32. The wireless power transmission apparatus of claim 15, wherein the one-turn of the outer coil includes a rectangular shape with rounded corners or a circular shape, and

wherein the half-turn of the first, second and third inner coil parts includes two rounded corners of a rectangular shape or one half or less of a circular shape.