Non-contact charging module, electronic apparatus, and non-contact charging apparatus

• US 9,035,605 B2
• Filed: 08/31/2012
• Issued: 05/19/2015
• Est. Priority Date: 09/08/2011
• Status: Expired

• 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, Kikui, Toshiaki, Tabata, Tatsunori
• Primary Examiner(s): Dunn, Drew A
• Assistant Examiner(s): Chung, Steve T
• Application Number:
  US14/343,536
• Publication Number:
  US 20140217970A1
• Time in Patent Office: 991 Days
• 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: H01M 10/46 Accumulators structurally combined with charging apparatus circuits for charging H02J7/00
• 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 50/90 involving detection or optimisation of position, e.g. alignment
• CPC Class Codes: H02J 7/0042 characterised by the mechanical construction
• CPC Class Codes: Y02E 60/10 Energy storage using batteries

Abstract

This non-contact charging module can be suitably used by suppressing a change of an L value of a coil that is provided in the non-contact charging module, and achieves size reduction, even in the cases where a magnet that is provided in the other non-contact charging module is used or not used. The module is characterized in that: the module is provided with a primary side coil (21a) wherein a conducting line is wound in a substantially rectangular shape, and a magnetic sheet (51) that is provided with a surface on which the primary side coil (21a) is placed; and that a substantially rectangular-shaped hollow portion of the primary side coil (21a) has the short side thereof shorter than the diameter of a circular magnet (30a), and the long side thereof longer than the diameter of the circular magnet (30a).

Claims

1. A first non-contact charging module configured to perform power transmission with a second non-contact charging module by electromagnetic induction and configured to be positioned with the second non-contact charging module using a circular magnet or without using the circular magnet for positioning, the circular magnet being provided at the second non-contact charging module, the first non-contact charging module comprising:

a planar coil portion including a conductive wire wound in a rectangular shape; and

a magnetic sheet provided with a surface on which the planar coil portion is placed, wherein

the planar coil portion includes a rectangular-shaped hollow portion that has a plurality of short sides shorter than a diameter of the circular magnet and a plurality of long sides longer than the diameter of the circular magnet,

the rectangular-shaped hollow portion of the planar coil portion has an outline in which every short side and long side of the outline is longer than the diameter of the circular magnet, and

the circular magnet is positioned on top of the planar coil portion.

2. A first non-contact charging device comprising the non-contact charging module according to claim 1.

3. The first non-contact charging module according to claim 1, wherein the rectangular-shaped hollow portion includes a plurality of corner portions, and the circular magnet does not overlap with either the plurality of short sides of the rectangular-shaped hollow portion or the plurality of corner portions of the rectangular-shaped hollow portion.

4. A first non-contact charging module configured to perform power transmission with a second non-contact charging module by electromagnetic induction and to be positioned with the second non-contact charging module using a circular magnet or without using the circular magnet for positioning, the circular magnet having a diameter of 15.5 mm at maximum and being provided at the second non-contact charging module, the first non-contact charging module comprising:

a planar coil portion including a conductive wire wound in a rectangular shape; and

a magnetic sheet provided with a surface on which the planar coil portion is placed, wherein

the planar coil portion includes a rectangular-shaped hollow portion that has a short side shorter than 15.5 mm and a long side longer than 15.5 mm,

the rectangular-shaped hollow portion of the planar coil portion has an outline in which every short side and long side of the outline is longer than the diameter of the circular magnet, and

the circular magnet is positioned on top of the planar coil portion.

5. The first non-contact charging module according to claim 4, wherein the rectangular-shaped hollow portion includes a plurality of corner portions, and each corner portion of the plurality of corner portions includes a curved shape that starts to curve at a distance equal to 30% or less of a corresponding long side and 30% or less of a corresponding short side of the rectangular-shaped hollow portion.

6. The first non-contact charging module according to claim 5, wherein the circular magnet is greater than half a distance of a difference between a length of the long side of the rectangular-shaped hollow portion and the diameter of the circular magnet.