NON-CONTACT CHARGING DEVICE, AND NON-CONTACT POWER SUPPLY SYSTEM USING SAME

• US 20150249360A1
• Filed: 06/19/2013
• Published: 09/03/2015
• Est. Priority Date: 09/05/2012
• Status: Active Grant

• Current Assignee: Renesas Electronics Corporation
• Original Assignee: Renesas Electronics Corporation
• Inventors: Ichikawa, Katsuei
• Granted Patent: US 9,991,731 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H01M 10/46 Accumulators structurally combined with charging apparatus circuits for charging H02J7/00
• 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 50/80 involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices
• CPC Class Codes: H02J 50/90 involving detection or optimisation of position, e.g. alignment
• 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 7/0042 characterised by the mechanical construction
• CPC Class Codes: H04B 5/79 for data transfer in combination with power transfer
• CPC Class Codes: Y02E 60/10 Energy storage using batteries

Abstract

A wide charging area and communication area are ensured in a non-contact power supply system with wireless communication.

The present invention includes a resonance coil, a wireless communication antenna coil, a power supply coil, and a sensitivity adjustment circuit coupled to the power supply coil. When electric power is supplied in a contactless manner, the power supply coil and the resonance coil are coupled electromagnetically and electric power supply from the resonance coil is performed by using a magnetic resonance method. When wireless communication is performed, the magnetic fluxes of the wireless communication antenna coil are coupled with those of the resonance coil and sensitivity is enhanced by the sensitivity adjustment circuit.

Claims

1. A non-contact power supply system comprising:

a non-contact charging device that transmits electric power by magnetic coupling; and

a portable terminal device that receives electric power from the non-contact charging device in a contactless manner, the non-contact charging device and the portable terminal device each including a wireless communication unit for communication with each other, the portable terminal device including a battery that is charged by the non-contact charging device, and

the non-contact charging device comprising;

a wireless communication antenna coil that is used for wireless communication;

an electric power transmitting antenna coil part comprising a power supply coil and a resonance coil, and upon transmitting electricity, electric power is supplied from the power supply coil to the resonance coil to transmit electricity from the resonance coil to the portable terminal device; and

an adjustment circuit that is coupled to the power supply coil and adjusts sensitivity when wireless communication is performed.

2. The non-contact power supply system according to claim 1, further comprising a suppression circuit coupled to the wireless communication antenna coil to prevent an electricity transmission signal from leaking in the wireless communication unit when electric power is transmitted.

3. The non-contact power supply system according to claim 1, wherein a semiconductor switch is used to turn the adjustment circuit ON/OFF.

4. The non-contact power supply system according to claim 2, wherein a semiconductor switch is used to turn the suppression circuit ON/OFF.

5. The non-contact power supply system according to claim 1, further comprising a variable capacitance circuit coupled to the resonance coil, wherein a resonance frequency provided by the resonance coil and the variable capacitance circuit is changed for use when wireless communication is performed and when electricity is transmitted.

6. The non-contact power supply system according to claim 1, wherein the electric power transmitting antenna coil part is placed inward of the wireless communication antenna coil.

7. A non-contact charging device that performs data transmission with a portable terminal device and supplies electric power to the portable terminal device, the non-contact charging device comprising:

a wireless communication unit that performs data transmission;

a wireless communication antenna coil that is coupled to the wireless communication unit and used for the data transmission;

a power supply coil;

a resonance coil;

a suppression circuit that is coupled to the wireless communication antenna coil and prevents a signal from the wireless communication antenna coil from being transferred to the wireless communication unit when electric power is supplied to the portable terminal device; and

an adjustment circuit that is coupled to the power supply coil and controls communication sensitivity when the data transmission is performed,

wherein the resonance coil forms magnetic fluxes in accordance with data to be transferred when data transmission is performed and forms magnetic fluxes in accordance with electric power to be transmitted when electric power is transmitted.

8. The non-contact charging device according to claim 7, wherein the resonance coil and the wireless communication antenna coil are formed on one plane and the resonance coil is placed inward of the wireless communication antenna coil.

9. The non-contact charging device according to claim 7, wherein the resonance coil and the wireless communication antenna coil are formed on one plane and the wireless communication antenna coil is placed inward of the resonance coil.