Power supplier and receiver and mobile device

• US 9,325,207 B2
• Filed: 05/28/2014
• Issued: 04/26/2016
• Est. Priority Date: 07/08/2013
• Status: Expired due to Fees

• Current Assignee: Nitto Denko Corporation
• Original Assignee: Nitto Denko Corporation
• Inventors: Hatanaka, Takezo, Tsuda, Hisashi
• Primary Examiner(s): CAVALLARI, DANIEL J
• Application Number:
  US14/422,228
• Publication Number:
  US 20150229163A1
• Time in Patent Office: 699 Days
• Field of Search: 307/104
• US Class Current: 1/1
• 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 50/12 of the resonant type
• CPC Class Codes: H02J 50/40 using two or more transmitting or receiving devices H02J50/50 takes precedence
• CPC Class Codes: H02J 50/90 involving detection or optimisation of position, e.g. alignment
• CPC Class Codes: H02J 7/00309 Overheat or overtemperature protection
• CPC Class Codes: H02J 7/00712 the cycle being controlled or terminated in response to electric parameters

Abstract

An arrangement place for a device such as a rectifier and a power storage device is easily secured. At the time of power supply using a resonance phenomenon, a power-receiving device generates a magnetic field space having a lower magnetic field strength than other parts at or around the inner side of the power-receiving module, and this magnetic field space is used as the arrangement place of an electronic component. The power-receiving module includes a power-receiving resonance coil which is resonated with a power-supplying module and a power-receiving coil which partly overlaps the power-receiving resonance coil in a coil diameter direction and receives and supplies power from and to the power-receiving resonance coil.

Claims

1. A power-receiving/supplying device comprising:

a coil module configured to receive and supply power from and to another coil module by a resonance phenomenon; and

an electronic component provided in a magnetic field space which is formed by the resonance phenomenon to have a low magnetic field strength,

the coil module including;

a resonance coil which is resonated with said another coil module; and

a power-receiving/supplying coil which partly overlaps the resonance coil in a coil diameter direction and is configured to receive and supply power from and to the resonance coil, the magnetic field space being formed at a predetermined position between or around said another coil module and the coil module to have a lower magnetic field strength than a magnetic field in parts around the predetermined position, by causing a magnetic field generated around the coil module and a magnetic field generated around said another coil module to cancel each other out.

2. The power-receiving/supplying device according to claim 1, wherein, each of the resonance coil and the power-receiving/supplying coil is a solenoid coil.

3. A portable device comprising the power-receiving/supplying device according to claim 1.

4. The portable device according to claim 3, further comprising an outer wall member exposed to the outside,

at least a part of the coil module of the power-receiving/supplying device being provided along a surface shape of the outer wall member.

5. The power-receiving/supplying device according to claim 1, wherein, the magnetic field space is formed by positionally arranging the coil module and the resonance coil so that the direction of a current flowing in said another coil module is opposite to the direction of a current flowing in the resonance coil when the power is supplied from said another coil module to the resonance coil by the resonance phenomenon, and setting a frequency of the power supplied to said another coil module to be higher than a resonance frequency between said another coil module and the coil module.

6. The power-receiving/supplying device according to claim 1, wherein, the magnetic field space is formed by positionally arranging the coil module and the resonance coil so that the direction of a current flowing in said another coil module is identical with the direction of a current flowing in the resonance coil when the power is supplied from said another coil module to the resonance coil by the resonance phenomenon, and setting a frequency of the power supplied to said another coil module to be lower than a resonance frequency between said another coil module and the coil module.