Non-contact charging module and reception-side and transmission-side non-contact charging apparatuses using the same

• US 8,552,684 B2
• Filed: 01/23/2012
• Issued: 10/08/2013
• Est. Priority Date: 01/26/2011
• Status: Active Grant

• Current Assignee: Sovereign Peak Ventures, LLC (Dominion Harbor Enterprises, LLC)
• Original Assignee: Panasonic Corporation (Panasonic Holdings Corporation)
• Inventors: Tabata, Kenichiro, Nishino, Tokuji, Hidaka, Akio, Kobayashi, Naoyuki
• Primary Examiner(s): Fantu, Yalkew
• Application Number:
  US13/355,796
• Publication Number:
  US 20120187903A1
• Time in Patent Office: 624 Days
• Field of Search: 320/108
• US Class Current: 320/108
• CPC Class Codes: H01F 38/14 Inductive couplings for wireless supply or distribution of electric power using inductive coupling H02J50/10
• CPC Class Codes: H01F 7/0247 Orientating, locating, transporting arrangements
• CPC Class Codes: H02J 50/005 Mechanical details of housing or structure aiming to accommodate the power transfer means, e.g. mechanical integration of coils, antennas or transducers into emitting or receiving devices
• 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
• CPC Class Codes: H02J 50/90 involving detection or optimisation of position, e.g. alignment
• CPC Class Codes: H02J 7/0042 characterised by the mechanical construction

Abstract

It is an object to provide a non-contact charging module that prevents the magnet from negatively influencing particularly the inside portion of a coil and improves power transmission efficiency, even when a magnet is used for alignment. This non-contact charging module is a reception-side non-contact charging module, to which power is transmitted from a transmission-side non-contact charging module which is equipped with magnet, by electromagnetic induction, in which the non-contact charging module includes a planar coil portion around which spiral electric lines are wound, and a magnetic sheet disposed to face the surface of coil of the planar coil portion so that it faces the magnet of the transmission-side contact module, in which the inner diameter of the planar coil portion is larger than the magnet.

Claims

1. A non-contact charging module that performs power transmission by an electromagnetic induction with another non-contact charging module that comprises a first hole and that is allowed to align with the other non-contact charging module in either a first case or a second case, the first case being a case where a magnet included within the first hole in the other non-contact charging module is used when alignment with the other non-contact charging module is performed, the second case being a case where the magnet is not within the first hole and thereby not used when the alignment is performed, the non-contact charging module comprising:

a planar coil portion in which a conducting wire is wound in a substantially rectangular shape and that comprises a second hole of a predetermined size, the second hole being provided within an inner winding of the planar coil portion; and

a magnetic sheet on which a coil surface of the planar coil portion is placed and that faces the coil surface of the planar coil portion, wherein

a length of a shortest distance between opposed inner sides of a substantially rectangular hollow portion of the planar coil portion is longer than a diameter of the magnet, and

the predetermined size of the second hole is greater than 15.5 mm.

2. The non-contact charging module according to claim 1, wherein a shape of the magnetic sheet is substantially rectangular and the magnetic sheet has a concave portion or slit that extends toward an edge of the magnetic sheet.

3. A non-contact charging module apparatus using the non-contact charging module according to claim 1 as at least one of a power transmission module or a power reception module.

4. The non-contact charging module according to claim 1, further comprising an alignment magnet, wherein the alignment magnet couples to the magnet included in the other non-contact charging module and the alignment magnet is used to align the non-contact charging module with the other non-contact charging module.

5. The non-contact charging module according to claim 4, wherein a first area of the first hole is greater than a second area of the alignment magnet.

6. The transmission-side non-contact charging module according to claim 5, wherein a first area of the first hole is greater than a second area of the alignment magnet.

7. The non-contact charging module according to claim 1, further comprising an alignment module, wherein the alignment module comprises an alignment unit to structurally align the non-contact charging module with the other non-contact charging module.

8. The non-contact charging module according to claim 1, wherein the planar coil portion further comprises a coil surface and the magnetic sheet is coupled opposite to the coil surface.

9. The non-contact charging module according to claim 8, wherein the magnetic sheet touches the coil surface.

10. The non-contact charging module according to claim 1, wherein the substantially rectangular hollow portion is formed at an inner position corresponding to the inner winding of the planar coil portion.

11. The noncontact charging module according to claim 1, wherein a first area of the second hole is greater than a second area of the magnet.

12. A transmission-side non-contact charging module that transmits power to a reception-side non-contact charging module that comprises a first hole by an electromagnetic induction and that is allowed to align with the reception-side non-contact charging module in either a first case or a second case, the first case being a case where a magnet included within the first hole in the reception-side non-contact charging module is used when alignment with the reception-side non-contact charging module is performed, the second case being a case where the magnet is not within the first hole and thereby not used when the alignment is performed, the transmission-side non-contact charging module comprising:

a planar coil portion in which a conducting wire is wound and that comprises a second hole of a predetermined size, the second hole being provided within an inner winding of the planar coil portion; and

a ferrite sheet on which a coil surface of the planar coil portion is placed and that faces the coil surface of the planar coil portion and that attracts, in the case where the magnet is used when the alignment with the reception-side non-contact charging module is performed, the magnet of the reception-side non-contact charging module,

wherein the predetermined size of the second hole is larger than a size of the magnet included in the reception-side non-contact charging module, and

wherein the predetermined size of the second hole is greater than 15.5 mm.

13. The transmission-side non-contact charging module according to claim 12, wherein a distance between an edge of a hollow portion of the planar coil portion and an outer edge of the magnet is more than 0 mm and smaller than 6 mm.

14. The transmission-side non-contact charging module according to claim 12, wherein the planar coil portion is configured such that an area of the magnet becomes 80 to 95% of area of the inner winding of the planar coil portion, in a surface parallel to the planar coil portion.

15. A transmission-side non-contact charging apparatus comprising a transmission-side non-contact charging module according to claim 12, the transmission-side non-contact charging module comprising:

a planar coil portion in which a conducting wire is wound in a spiral shape and comprises a second hole of a predetermined size, the second hole being provided within an inner winding of the planar coil portion;

a terminal that supplies a current from an external power supply to the planar coil portion; and

a magnetic sheet that places a coil surface of the planar coil portion and faces the coil surface of the planar coil portion, wherein

the predetermined size of the second hole is at least equal to a size of the first hole in the reception-side non-contact charging module, and

the predetermined size of the second hole is greater than 15.5 mm.

16. The transmission-side non-contact charging module according to claim 12, wherein the ferrite sheet is magnetically coupled to an alignment magnet of the reception-side non-contact charging module.

17. The transmission-side non-contact charging module according to claim 16, wherein the planar coil portion is configured such that an area of the alignment magnet becomes 80 to 95% of n area of the inner winding of the planar coil portion, in a surface parallel to the planar coil portion.

18. The transmission-side non-contact charging module according to claim 12, wherein the transmission-side non-contact charging module is structurally coupled to the reception-side non-contact charging module.

19. The transmission-side non-contact charging module according to claim 12, wherein a first area of the second hole is greater than a second area of the magnet.

20. A reception-side non-contact charging module that receives power from a transmission-side non-contact charging module that comprises a first hole by an electromagnetic induction and that is allowed to align with the transmission-side non-contact charging module in either a first case or a second case, the first case being a case where a magnet included within the first hole in the transmission-side non-contact charging module is used when alignment with the transmission-side non-contact charging module is performed, the second case being a case where the magnet is not within the first hole and thereby not used when the alignment is performed, the reception-side contact charging module comprising:

a planar coil portion in which a conducting wire is wound in a spiral shape and comprises a second hole of a predetermined size, the second hole being provided within an inner winding of the planar coil portion; and

a magnetic sheet on which a coil surface of the planar coil portion is placed and that faces the coil surface of the planar coil portion and that attracts, in the case where the magnet is used when the alignment with the transmission-side non-contact charging module is performed, the magnet of the transmission-side non-contact charging module, wherein

an inner diameter of the planar coil portion is larger than the magnet included in the transmission-side non-contact charging module, and

the predetermined size of the second hole is greater than 15.5 mm.

21. The reception-side non-contact charging module according to claim 20, wherein a distance between an edge of the inner diameter of the planar coil portion and an outer edge of the magnet is more than 0 mm and smaller than 6 mm.

22. The reception-side non-contact charging module according to claim 20, wherein the planar coil portion is configured such that an area of the magnet becomes 80 to 95% of area of the inner winding of the planar coil portion, in a surface parallel to the planar coil portion.

23. A reception-side non-contact charging apparatus, comprising the reception-side non-contact charging module according to claim 20, that receives power from a transmission-side non-contact charging apparatus comprising the transmission-side non-contact charging module.

24. The reception-side non-contact charging module according to claim 20, further comprising an alignment magnet, wherein the alignment magnet couples to the magnet included in the transmission-side non-contact charging module and the alignment magnet is used to align the reception-side non-contact charging module with the transmission-side non-contact charging module.

25. The reception-side non-contact charging module according to claim 24, wherein a first area of the first hole is greater than a second area of the alignment magnet.

26. The reception-side non-contact charging module according to claim 24, wherein the planar coil portion is configured such that an area of the alignment magnet becomes 80 to 95% of an area of the inner winding of the planar coil portion, in a surface parallel to the planar coil portion.

27. The reception-side non-contact charging module according to claim 24, wherein the alignment magnet has a circular shape and a diameter of the alignment magnet is 15.5 mm.

28. The reception-side non-contact charging module according to claim 20, further comprising an alignment module, wherein the alignment module comprises an alignment unit to structurally align the reception-side non-contact charging module with the transmission-side non-contact charging module.

29. The reception-side non-contact charging module according to claim 20, wherein a first area of the second hole is greater than a second area of the magnet.

30. A non-contact charging module that performs power transmission by an electromagnetic induction with another non-contact charging module that comprises a first hole and that is allowed to align with the other non-contact charging module in either a first case or a second case, the first case being a case where a magnet included within the first hole in the other non-contact charging module is used when alignment with the other non-contact charging module is performed, the second case being a case where the magnet is not within the first hole and thereby not used when the alignment is performed, the non-contact charging module comprising:

a planar coil portion in which a conducting wire is wound in a substantially rectangular shape and that comprises a second hole of a predetermined size, the second hole being provided within an inner winding of the planar coil portion; and

a magnetic sheet on which a coil surface of the planar coil portion is placed and that faces the coil surface of the planar coil portion, wherein

the predetermined size of the second hole is at least equal to a size of the first hole, and

the predetermined size of the second hole is greater than 15.5 mm.

31. A reception-side non-contact charging module that receives power from a transmission-side non-contact charging module that comprises a first hole by an electromagnetic induction and that is allowed to align with the transmission-side non-contact charging module in either a first case or a second case, the first case being a case where a magnet included within the first hole in the transmission-side non-contact charging module is used when alignment with the transmission-side non-contact charging module is performed, the second case being a case where the magnet is not within the first hole and thereby not used when the alignment is performed, the reception-side contact charging module comprising:

a planar coil portion in which a conducting wire is wound in a spiral shape and comprises a second hole of a predetermined size, the second hole being provided within an inner winding of the planar coil portion; and

a magnetic sheet on which a coil surface of the planar coil portion is placed and that faces the coil surface of the planar coil portion and that attracts, in the case where the magnet is used when the alignment with the transmission-side non-contact charging module is performed, the magnet of the transmission-side non-contact charging module, wherein

the predetermined size of the second hole is at least equal to a size of the first hole, and

the predetermined size of the second hole is greater than 15.5 mm.