WIRELESS CHARGING MODULE HAVING A WIRELESS CHARGING COIL AND A MAGNETIC SHEET

• US 20180175645A1
• Filed: 02/20/2018
• Published: 06/21/2018
• Est. Priority Date: 12/01/2010
• Status: Abandoned Application

• Current Assignee: Sovereign Peak Ventures, LLC (Dominion Harbor Enterprises, LLC)
• Original Assignee: Panasonic Intellectual Property Management Co., Ltd. (Panasonic Holdings Corporation)
• Inventors: Tabata, Kenichiro, Hidaka, Akio, Nishino, Tokuji
• Application Number:
  US15/900,440
• Publication Number:
  US 20180175645A1
• Time in Patent Office: Days
• 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 50/005 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 50/10 using inductive coupling
• 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

Provided are a non-contact charging module and a non-contact charging instrument such that the non-contact module can be made thin in a state where a sufficient cross-sectional area of a planar coil portion has been ensured and power transmission efficiency has been enhanced. The non-contact module comprises the planar coil portion (2) on which a plurality of conducting wires have been spirally wound, and a magnetic sheet provided so as to oppose a surface of a coil (21) of the planar coil portion (2), the plurality of conducting wires are respectively connected together at both ends, and the planar coil portion (2) has a part wound overlapped in multiple layers and another part wound in a single layer.

Claims

1. A wireless charging module comprising:

a wireless charging coil formed of an electrical wire wound to form a winding portion having a circular shape and plural leg portions; and

a magnetic sheet overlapping the wireless charging coil and having a shape that does not coincide with the circular shape of the winding portion of the wireless charging coil;

wherein

the magnetic sheet includes a flat portion and a convex portion that projects above the flat portion and that is positioned at a center of the flat portion;

a first thickness of the flat portion of the magnetic sheet in a thickness direction of the magnetic sheet is greater than a second thickness of the convex portion of the magnetic sheet; and

the flat portion of the magnetic sheet includes a recess at a position corresponding to at least a portion of at least one of the leg portions of the wireless charging coil.

2. The wireless charging module according to claim 1, wherein a first height of the magnetic sheet in the thickness direction of the magnetic sheet is greater than a second height of the winding portion of the wireless charging coil.

3. The wireless charging module according to claim 1, wherein the electrical wire is wound to define a hollow portion surrounded by the winding portion, and the convex portion of the magnetic sheet is received in the hollow portion of the wireless charging coil.

4. The wireless charging module according to claim 3, wherein the largest span of the hollow portion is between 10 mm and 20 mm.

5. The wireless charging module according to claim 3, wherein the hollow portion has a circular shape and a diameter of the circular-shape hollow portion is between 10 mm and 20 mm.

6. The wireless charging module according to claim 1, wherein a center of the convex portion of the magnetic sheet coincides with an axis of the wireless charging coil.

7. The wireless charging module according to claim 1, wherein at least an end portion of at least one of the leg portions of the wireless charging coil is received in the recess.

8. The wireless charging module according to claim 1, configured as a power transmission module.

9. The wireless charging module according to claim 1, configured as a power reception module.