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

• US 8,547,058 B2
• Filed: 01/23/2012
• Issued: 10/01/2013
• Est. Priority Date: 01/26/2011
• Status: Expired due to Fees

• Current Assignee: Sovereign Peak Ventures, LLC (Dominion Harbor Enterprises, LLC)
• Original Assignee: Panasonic Corporation (Panasonic Holdings Corporation)
• Inventors: Tabata, Kenichiro, Nishino, Tokuji, Hidaka, Akio
• Primary Examiner(s): Fantu, Yalkew
• Application Number:
  US13/355,865
• Publication Number:
  US 20120187904A1
• Time in Patent Office: 617 Days
• Field of Search: 320/108
• US Class Current: 320/108
• CPC Class Codes: H01F 38/10 Ballasts, e.g. for discharge lamps
• 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 50/12 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

Abstract

It is an object to provide a non-contact charging module that uses a magnet included in a counterpart-side non-contact charging module or does not use the magnet when aligning with the counterpart-side non-contact charging module is performed. An L value of a coil that is provided in the non-contact charging module is not changed. This non-contact charging module includes a planar coil portion where electrical lines are wound and a magnetic sheet that places a coil surface of the planar coil portion and faces the coil surface of the planar coil portion, and in the magnetic sheet, a hole portion is provided at the position corresponding to a hollow portion of the planar coil portion.

Claims

1. A reception-side non-contact charging module that receives power from a transmission-side non-contact charging module by an electromagnetic induction and that has a case where a magnet included in the transmission-side non-contact charging module is used to align with the transmission-side non-contact charging module or a case where the magnet is not used to align with the transmission-side non-contact charging module, the reception-side contact charging module comprising:

a planar coil portion in which a conducting wire is wound; 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 magnetic sheet has a concavity of a predetermined depth provided within an inner winding of the planar coil portion, and

wherein the predetermined depth of the concavity is 40 to 60% of a thickness of the magnetic sheet.

2. The reception-side non-contact charging module according to claim 1, wherein a shape of a top surface of the through-hole is the same as a shape of the inner circle winding of the planar coil portion.

3. The reception-side non-contact charging module according to claim 2, wherein all ends of the through-hole are at the same distance from the inner winding of the planar coil portion.

4. A reception-side non-contact charging apparatus, comprising the reception-side non-contact charging module according claim 1, that receives power from a transmission-side non-contact charging apparatus comprising the transmission-side non-contact charging module.

27. The reception-side non-contact charging module according to claim 1, wherein the concavity is partially bored into the magnetic sheet.

5. A transmission-side non-contact charging module that transmits power to a reception-side non-contact charging module by an electromagnetic induction, that has a case where a magnet provided in a hollow portion of a reception-side planar coil portion included in the reception-side non-contact charging module is used when alignment with the reception-side non-contact charging module is performed or a case where the magnet is not used when the alignment is performed, and that itself does not have the magnet for the alignment, the transmission-side non-contact charging module comprising:

a transmission-side planar coil portion in which a conducting wire is wound; and

a magnetic sheet on which a coil surface of the planar coil portion is placed and that faces the coil surface of the transmission-side 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 magnetic sheet has a through-hole provided within an inner winding of the transmission-side planar coil portion; and

an area of the hollow portion is equal to or more than 30% of an area of a center portion of the magnetic sheet.

7. The transmission-side non-contact charging module according claim 5, wherein a shape of a top surface of the through-hole is the same as a shape of the inner winding of the transmission-side planar coil portion.

8. The transmission-side non-contact charging module according to claim 7, wherein all ends of the through-hole are at the same distance from the inner winding of the transmission-side planar coil portion.

9. The transmission-side non-contact charging module according to claim 5, wherein the through-hole is formed larger than the magnet.

10. The transmission-side non-contact charging module according to claim 5, wherein a center of the through-hole coincides with a center of the center portion of the transmission-side planar coil portion.

11. A transmission-side non-contact charging apparatus comprising the transmission-side non-contact charging module according to claim 5.

30. The transmission-side non-contact charging module according to claim 5, wherein the transmission-side planar coil portion is formed by spirally winding the conducting wire.

31. The transmission-side non-contact charging module according to claim 30, wherein the through-hole is formed at an inner position corresponding to the inner winding of the planar coil portion.

33. The transmission-side non-contact charging module according to claim 5, wherein the through-hole is centered opposite to the inner winding of the planar coil portion.

34. The transmission-side non-contact charging module according to claim 31, wherein the through-hole is concentric to the inner winding of the planar coil portion.

35. The transmission-side non-contact charging module according to claim 5, wherein the magnet sheet is operatively coupled to an alignment magnet of the reception-side non-contact charging module.

36. The transmission-side non-contact charging module according to claim 35, wherein the through-hole has an area greater that an area of the alignment magnet.

6. A transmission-side non-contact charging module that transmits power to a reception-side non-contact charging module by an electromagnetic induction, that has a case where a magnet provided in a hollow portion of a reception-side planar coil portion included in the reception-side non-contact charging module is used when alignment with the reception-side non-contact charging module is performed or a case where the magnet is not used when the alignment is performed, and that itself does not have the magnet for the alignment, the transmission-side non-contact charging module comprising:

a transmission-side planar coil portion in which a conducting wire is wound; and

a magnetic sheet on which a coil surface of the planar coil portion is placed and that faces the coil surface of the transmission-side 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 magnetic sheet has a concavity of a predetermined depth provided within an inner winding of the transmission-side planar coil portion,

an area of the hollow portion is equal to or more than 30% of an area of a center portion of the magnetic sheet, and

the predetermined depth of the concavity is 40 to 60% of a thickness of the magnetic sheet.

32. The transmission-side non-contact charging module according to claim 6, wherein the concavity is partially bored into the magnetic sheet.

12. A reception-side non-contact charging module that receives power from a transmission-side non-contact charging module by an electromagnetic induction and that has a case where a magnet provided in a hollow portion of a transmission-side planar coil portion included in the transmission-side non-contact charging module is used when alignment with the transmission-side non-contact charging module is performed or a case where the magnet is not used when the alignment is performed, the reception-side non-contact charging module comprising:

a reception-side planar coil portion in which a conducting wire is wound in a substantially rectangular shape; and

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

wherein the magnetic sheet has a through-hole provided within an inner winding of the reception-side planar coil portion, the hollow portion of the transmission-side planar coil portion being in a substantially rectangular shape.

14. The reception-side non-contact charging module according to claim 12, wherein a shape of a top surface of the through-hole is the same as a shape of the inner winding of the reception-side planar coil portion.

15. The reception-side non-contact charging module according to claim 14, wherein all ends of the through-hole are at the same distance from ends of the inner winding of the reception-side planar coil portion.

16. The reception-side non-contact charging module according to claim 12, wherein the through-hole is formed larger than the magnet.

17. The reception-side non-contact charging module according to claim 12, wherein a center of the through-hole coincides with a center of a center portion of the reception-side planar coil portion.

19. A portable terminal apparatus comprising the reception-side non-contact charging module according to claim 12.

21. The reception-side non-contact charging module according to claim 12, wherein the planar coil portion is formed by spirally winding the conducting wire.

22. The reception-side non-contact charging module according to claim 12, further comprising an alignment magnet, wherein the alignment magnet couples to a 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.

23. The reception-side non-contact charging module according to claim 12, further comprising an alignment module, wherein the alignment module does not use a magnet to align the reception-side non-contact charging module with the transmission-side non-contact charging module.

24. The reception-side non-contact charging module according to claim 12, wherein the planar coil portion further comprises a coil surface and the magnetic sheet is coupled opposite to the coil surface.

25. The reception-side non-contact charging module according to claim 24, wherein the magnetic sheet touches the coil surface.

26. The reception-side non-contact charging module according to claim 21, wherein the through-hole is formed at an inner position corresponding to the inner winding of the planar coil portion.

28. The reception-side non-contact charging module according to claim 12, wherein the through-hole is centered opposite to the inner winding of the planar coil portion.

29. The reception-side non-contact charging module according to claim 26, wherein the through-hole is concentric to the inner winding of the planar coil portion.

13. A reception-side non-contact charging module that receives power from a transmission-side non-contact charging module by an electromagnetic induction and that has a case where a magnet provided in a hollow portion of a transmission-side planar coil portion included in the transmission-side non-contact charging module is used when alignment with the transmission-side non-contact charging module is performed or a case where the magnet is not used when the alignment is performed, the reception-side non-contact charging module comprising:

a reception-side planar coil portion in which a conducting wire is wound in a substantially rectangular shape; and

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

the magnetic sheet has a concavity of a predetermined depth provided within an inner winding of the reception-side planar coil portion, the hollow portion of the transmission-side planar coil portion being in a substantially rectangular shape, and

the predetermined depth of the concavity is 40 to 60% of a thickness of the magnetic sheet.

18. A transmission-side non-contact charging module that transmits power to a reception-side non-contact charging module by an electromagnetic induction and that has a case where a magnet provided in a hollow portion of a reception-side planar coil portion included in the reception-side non-contact charging module is used when alignment with the reception-side non-contact charging module is performed or a case where the magnet is not used when alignment with the reception-side non-contact charging module is performed, the transmission-side non-contact charging module comprising:

a transmission-side planar coil portion in which a conducting wire is wound in a substantially rectangular shape; and

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

wherein the magnetic sheet has a through-hole provided within an inner winding of the transmission-side planar coil portion, the hollow portion of the reception-side planar coil portion being in a substantially rectangular shape.

20. A non-contact charging apparatus comprising the transmission-side non-contact charging module according to claim 18.