Mobile terminal including wireless charging module and battery pack

• US 9,935,481 B2
• Filed: 02/01/2013
• Issued: 04/03/2018
• Est. Priority Date: 02/17/2012
• 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: Yamaguchi, Shuichiro, Tabata, Kenichiro, Fujimura, Munenori, Hidaka, Akio, Naruse, Takumi
• Primary Examiner(s): Whitmore, Stacy
• Application Number:
  US14/376,574
• Publication Number:
  US 20140375262A1
• Time in Patent Office: 1,887 Days
• Field of Search: 320107-108
• CPC Class Codes: H01F 38/14 Inductive couplings for wireless supply or distribution of electric power using inductive coupling H02J50/10
• CPC Class Codes: H01Q 1/243 with built-in antennas
• CPC Class Codes: H01Q 1/38 formed by a conductive layer on an insulating support patch antennas H01Q9/0407; microstrip dipole antennas H01Q9/065; microstrip slot antennas H01Q13/106; transmission line microstrip antennas H01Q13/206; manufacturing reflecting surfaces using insulating material for supporting the reflecting surface H01Q15/142
• CPC Class Codes: H01Q 1/521 reducing the coupling between adjacent antennas
• CPC Class Codes: H01Q 21/28 Combinations of substantially independent non-interacting antenna units or systems multiple beam H01Q25/00
• CPC Class Codes: H01Q 7/06 with core of ferromagnetic material H01Q7/02 takes precedence
• 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 50/12 of the resonant type
• CPC Class Codes: H02J 50/90 involving detection or optimisation of position, e.g. alignment
• CPC Class Codes: H02J 7/00 Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
• CPC Class Codes: H02J 7/00034 Charger exchanging data with an electronic device, i.e. telephone, whose internal battery is under charge
• CPC Class Codes: H02J 7/0044 specially adapted for holding portable devices containing batteries H02J7/0045 takes precedence
• CPC Class Codes: Y02E 60/10 Energy storage using batteries

Abstract

A mobile terminal is provided, which includes a wireless charging module, a battery pack, and a circuit board substrate. The wireless charging module includes a charging coil formed of a wound conducting wire and a communication coil placed adjacent to the charging coil. The wireless charging module has a substantially planar shape. The battery pack has a substantially planar shape and is configured to store power from the wireless charging module. The circuit board substrate is configured to control operation of the mobile terminal. The wireless charging module overlaps with each of the circuit board substrate and the battery pack.

Claims

1. A mobile terminal comprising:

a wireless charging module including a charging coil formed of a wound conducting wire and a communication coil placed adjacent to the charging coil, the wireless charging module having a substantially planar shape, wherein a distance between the communication coil and the charging coil is non-uniform;

a battery pack having a substantially planar shape and configured to store power from the wireless charging module; and

a circuit board substrate configured to control operation of the mobile terminal, wherein the wireless charging module overlaps with at least one of the circuit board substrate and the battery pack, and the circuit board substrate does not overlap with the battery pack.

2. The mobile terminal according to claim 1, wherein a number of turns of the charging coil is greater than a number of turns of the communication coil.

3. The mobile terminal according to claim 1, wherein the charging coil is formed in a substantially polygonal shape.

4. The mobile terminal according to claim 3, wherein the charging coil is formed in a substantially rectangular shape.

5. The mobile terminal according to claim 4, wherein the charging coil is formed in a substantially square shape.

6. The mobile terminal according to claim 1, wherein the charging coil is formed in an oval shape or a circular shape.

7. The mobile terminal according to claim 1, wherein the charging coil is formed of the conducting wire that is a Litz wire.

8. The mobile terminal according to claim 1, wherein the charging coil is formed to define a hollow portion surrounded by the wound conducting wire.

9. The mobile terminal according to claim 8, wherein the hollow portion has a substantially polygonal shape.

10. The mobile terminal according to claim 9, wherein the hollow portion has a substantially rectangular shape.

11. The mobile terminal according to claim 10, wherein the hollow portion has a substantially square shape.

12. The mobile terminal according to claim 8, wherein the hollow portion has an oval shape or a circular shape.

13. The mobile terminal according to claim 8, wherein the largest linear dimension of the hollow portion is greater than 15.5 mm.

14. The mobile terminal according to claim 8, further comprising a magnetic sheet on which the charging coil is mounted.

15. The mobile terminal according to claim 14, wherein the magnetic sheet has a raised portion that faces the hollow portion of the charging coil.

16. The mobile terminal according to claim 14, wherein the magnetic sheet includes a slit in which two end portions of the conducting wire are received.

17. The mobile terminal according to claim 14, wherein a combined thickness of the charging coil and the magnetic sheet is between 0.6 mm and 1.0 mm.

18. The mobile terminal according to claim 1, wherein the communication coil is configured to perform near field communication.

19. The mobile terminal according to claim 1, wherein the communication coil is configured to perform communication by electromagnetic induction.

20. The mobile terminal according to claim 1, wherein the wireless charging module overlaps with the circuit board substrate.

21. The mobile terminal according to claim 1, wherein the wireless charging module overlaps with the battery pack.

22. The mobile terminal according to claim 1, wherein the wireless charging module overlaps with both the circuit board substrate and the battery pack.