Non contact-power receiving/transmitting device and manufacturing method therefor

• US 9,130,408 B2
• Filed: 12/21/2010
• Issued: 09/08/2015
• Est. Priority Date: 12/25/2009
• Status: Active Grant

• Current Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Original Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Inventors: Ichikawa, Shinji
• Primary Examiner(s): AMAYA, CARLOS DAVID
• Application Number:
  US13/515,950
• Publication Number:
  US 20130038135A1
• Time in Patent Office: 1,722 Days
• Field of Search: 307/104
• US Class Current: 1/1
• CPC Class Codes: B60L 53/126 Methods for pairing a vehicle and a charging station, e.g. establishing a one-to-one relation between a wireless power transmitter and a wireless power receiver
• CPC Class Codes: H01F 27/363 made of electrically conductive material
• 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 50/12 of the resonant type
• CPC Class Codes: H02J 50/70 involving the reduction of electric, magnetic or electromagnetic leakage fields
• CPC Class Codes: Y02T 10/70 Energy storage systems for electromobility, e.g. batteries
• CPC Class Codes: Y02T 10/7072 Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
• CPC Class Codes: Y02T 90/12 Electric charging stations
• CPC Class Codes: Y02T 90/14 Plug-in electric vehicles
• CPC Class Codes: Y10T 29/4902 Electromagnet, transformer or inductor

Abstract

A manufacturing method for a non-contact power receiving/transmitting device that transmits or receives electric power in a non-contact manner and that includes a coil unit and an electromagnetic shield, wherein the coil unit includes a self-resonance coil that is configured to receive or transmit electric power via an electromagnetic field generated through electromagnetic resonance and an adjusting unit that adjusts a resonance frequency of the self-resonance coil, the manufacturing method including: installing the coil unit; arranging the electromagnetic shield around the self-resonance coil except a direction in which electric power is received or transmitted; and adjusting the adjusting unit in accordance with a distance between the coil unit and a surface of the electromagnetic shield vertical to a direction of the electromagnetic field inside the self-resonance coil so that the resonance frequency becomes a predetermined frequency.

Claims

1. A manufacturing method for a non-contact power receiving/transmitting device that transmits or receives electric power in a non-contact manner and that includes a coil unit and an electromagnetic shield, wherein the coil unit includes a self-resonance coil that is configured to receive or transmit electric power via an electromagnetic field generated through electromagnetic resonance and an adjusting unit that adjusts a resonance frequency of the self-resonance coil, the manufacturing method comprising:

installing the coil unit;

arranging the electromagnetic shield around the self-resonance coil except a direction in which electric power is received or transmitted; and

adjusting the adjusting unit in accordance with a distance between the coil unit and a surface of the electromagnetic shield vertical to a direction of the electromagnetic field inside the self-resonance coil so that the resonance frequency becomes a predetermined frequency.

2. The manufacturing method for a non-contact power receiving/transmitting device according to claim 1, wherein

the adjusting unit includes a capacitor that is connected to both ends of the self-resonance coil and of which a capacitance is variable.

3. The manufacturing method for a non-contact power receiving/transmitting device according to claim 2, wherein

the capacitor includes a first capacitor that has a fixed capacitance and a second capacitor that has a variable capacitance and that is connected in parallel to the first capacitor with respect to the self-resonance coil.

4. The manufacturing method for a non-contact power receiving/transmitting device according to claim 2, wherein

the capacitor is arranged inside the self-resonance coil.

5. The manufacturing method for a non-contact power receiving/transmitting device according to claim 2, wherein

the resonance frequency is adjusted by varying the capacitance of the capacitor.

6. The manufacturing method for a non-contact power receiving/transmitting device according to claim 1, wherein

the adjusting unit includes an inductance varying unit that is configured to vary an inductance of the self-resonance coil.

7. The manufacturing method for a non-contact power receiving/transmitting device according to claim 6, wherein

the inductance varying unit includes a variable coil that is connected in series to the self-resonance coil.

8. The manufacturing method for a non-contact power receiving/transmitting device according to claim 6, wherein

the resonance frequency is adjusted by varying the inductance of the self-resonance coil.

9. The manufacturing method for a non-contact power receiving/transmitting device according to claim 1, wherein

the electromagnetic shield includes a copper conductor.

10. A non-contact power receiving/transmitting device that transmits or receives electric power in a non-contact manner, comprising:

a self-resonance coil that is configured to receive or transmit electric power via an electromagnetic field generated through electromagnetic resonance;

an electromagnetic shield that is arranged around the self-resonance coil except a direction in which electric power is received or transmitted; and

an adjusting unit that adjusts a resonance frequency of the self-resonance coil in accordance with a distance between the self-resonance coil and a surface of the electromagnetic shield vertical to a direction of the electromagnetic field inside the self-resonance coil so that the resonance frequency of the self-resonance coil becomes a predetermined frequency.

11. The non-contact power receiving/transmitting device according to claim 10, wherein

the adjusting unit includes a capacitor that is connected to both ends of the self-resonance coil and of which a capacitance is variable.

12. The non-contact power receiving/transmitting device according to claim 11, wherein

the capacitor includes a first capacitor that has a fixed capacitance and a second capacitor that has a variable capacitance and that is connected in parallel to the first capacitor with respect to the self-resonance coil.

13. The non-contact power receiving/transmitting device according to claim 11, wherein

the capacitor is arranged inside the self-resonance coil.

14. The non-contact power receiving/transmitting device according to claim 10, wherein

the adjusting unit includes an inductance varying unit that is configured to vary an inductance of the self-resonance coil.

15. The non-contact power receiving/transmitting device according to claim 14, wherein

the inductance varying unit includes a variable coil that is connected in series to the self-resonance coil.