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

• US 8,928,278 B2
• Filed: 08/27/2013
• Issued: 01/06/2015
• Est. Priority Date: 01/26/2011
• Status: Expired due to Fees

• 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
• Primary Examiner(s): Fantu, Yalkew
• Application Number:
  US14/011,155
• Publication Number:
  US 20140062393A1
• Time in Patent Office: 497 Days
• 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 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

a magnetic sheet that places the planar coil, wherein the magnetic sheet has a hole provided within an inner winding of the planar coil; and

the non-contact charging module has a case where a magnet included within an inner winding of the planar coil in another non-contact charging module is used to align with the non-contact charging module or a case where the magnet is not used to align with the transmission-side non-contact charging module;

wherein both first L value which is the L value of the planar coil when a magnet is included within an inner winding of the planar coil in another non-contact charging module and second L value which is the L value of the planar coil when a magnet isn'"'"'t included within an inner winding of the planar coil in another non-contact charging module are between third L value and fourth L value, the third L value is the L value of a planar coil which is placed on a magnetic sheet which doesn'"'"'t have a hole provided within an inner winding of the planar coil when a magnet is included within an inner winding of the planar coil in another non-contact charging module, and the fourth L value is the L value of a planar coil which is placed on a magnetic sheet which doesn'"'"'t have a hole provided within an inner winding of the planar coil when a magnet isn'"'"'t included within an inner winding of the planar coil in another non-contact charging module.

2. The non-contact charging module according to claim 1, wherein the hole is a through-hole.

3. The non-contact charging module according to claim 1, wherein the hole is a concavity.

4. The non-contact charging module according to claim 3, wherein the depth of the concavity is 40 to 60% of a thickness of the magnetic sheet.

5. The non-contact charging module according to claim 1, wherein a shape of a top surface of the hole is the same as a shape of the inner winding of the planar coil.

6. The non-contact charging module according to claim 1, wherein all ends of the hole are at the same distance from the inner winding of the planar coil.

7. The non-contact charging module according to claim 1, wherein an area of the hole is equal to or more than 30% of an area of the inner winding of the planar coil.

8. The non-contact charging module according to claim 1, wherein the hole is formed larger than the magnet.

9. The non-contact charging module according to claim 1, wherein a center of the hole coincides with a center of the inner winding of the planar coil.

10. The non-contact charging module according to claim 1, wherein the inner winding of the planar coil is in a substantially rectangular shape.

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

12. The non-contact charging module according to claim 1, wherein the planar coil is formed by spirally winding the conducting wire.

13. The non-contact charging module according to claim 1, further comprising an alignment module, wherein the alignment module does not use a magnet to align the other non-contact charging module with the non-contact charging module.

14. The non-contact charging module according to claim 1, wherein the magnetic sheet touches the coil.

15. 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.

16. 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.