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

• US 8,963,490 B2
• Filed: 08/28/2013
• Issued: 02/24/2015
• Est. Priority Date: 01/26/2011
• Status: Active Grant

• Current Assignee: Sovereign Peak Ventures, LLC (Dominion Harbor Enterprises, LLC)
• Original Assignee: Panasonic Intellectual Property Management Co., Ltd. (Panasonic Holdings Corporation)
• Inventors: Tabata, Kenichiro, Nishino, Tokuji, Hidaka, Akio, Kobayashi, Naoyuki
• Primary Examiner(s): Fantu, Yalkew
• Application Number:
  US14/012,191
• Publication Number:
  US 20140070766A1
• Time in Patent Office: 545 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 with another non-contact charging module, the non-contact charging module comprising:

a planar coil in which a conducting wire is wound and which comprises a hollow portion being provided within an inner winding of the planar coil ; and

a magnetic sheet on which the planar coil portion is placed, wherein a size of the hollow portion of the planar coil is greater than 15.5 mm; and

wherein the non-contact charging module is allowed to align with an another non-contact charging module that comprises a first hole 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 or, the second case being a case where the magnet is not within the first hole and thereby not used when the alignment is performed.

2. The non-contact charging module according to claim 1, wherein the magnet is in circular shape and diameter of the magnet is less than 15.5 mm

3. The non-contact charging module according to claim 1, wherein the conducting wire is wound in a substantially rectangular shape in the planar coil.

4. The non-contact charging module according to claim 1, wherein the conducting wire is wound in a substantially circular shape in the planar coil portion.

5. The non-contact charging module according to claim 1, wherein a shape of the magnetic sheet is substantially rectangular.

6. The non-contact charging module according to claim 1, wherein the magnetic sheet is a ferrite sheet.

7. The non-contact charging module according to claim 1, wherein the magnetic sheet has a concave portion or slit that extends toward an edge of the magnetic sheet, and a part of the conducting wire is housed in the concave portion or slit.

8. The non-contact charging module according to claim 1, wherein a distance between an edge of the hollow portion of the planar coil and an outer edge of the magnet is more than 0 mm and smaller than 6 mm.

9. The non-contact charging module according to claim 1, wherein the planar coil is configured such that an area of the magnet is 80 to 95% of an area of the inner winding of the planar coil.

10. The non-contact charging module according to claim 1, wherein the magnetic sheet on which the planar coil portion is placed is attracted, in the case where the magnet is used when the alignment with the other non-contact charging module is performed, by the magnet of the other non-contact charging module.

11. 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.

12. The non-contact charging module according to claim 1, wherein the shape of the hollow portion is substantially rectangular.

13. The non-contact charging module according to claim 1, wherein the size of the hollow portion of the non-contact charging module is at least equal to a size of a first hole of the other non-contact charging module.

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

15. A transmission-side non-contact charging apparatus comprising the non-contact charging module according to claim 1, that transmits power to a reception-side non-contact charging apparatus.