Noncontact electric power receiving device, noncontact electric power transmitting device, noncontact electric power feeding system, and vehicle

• US 8,692,413 B2
• Filed: 03/18/2009
• Issued: 04/08/2014
• Est. Priority Date: 03/18/2009
• Status: Active Grant

• Current Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Original Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Inventors: Sasaki, Masaru, Ichikawa, Shinji, Nakamura, Toru, Yamamoto, Yukihiro, Kikuchi, Taira
• Primary Examiner(s): CAVALLARI, DANIEL J
• Application Number:
  US13/060,352
• Publication Number:
  US 20110254376A1
• Time in Patent Office: 1,847 Days
• Field of Search: 307/104
• US Class Current: 307/104
• CPC Class Codes: B60L 2270/147 electro magnetic [EMI]
• CPC Class Codes: B60L 5/005 without mechanical contact between the collector and the power supply line
• CPC Class Codes: B60L 53/122 Circuits or methods for driving the primary coil, e.g. supplying electric power to the coil
• CPC Class Codes: B60M 7/003 for vehicles using stored power (e.g. charging stations)
• 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

Abstract

In a noncontact electric power feeding system using a resonance method, electrical equipment installed within a coil case is configured to include an electric power receiving antenna and a rectifier in an integrated manner. The electrical equipment is driven by receiving electric power from an electromagnetic field generated by electromagnetic resonance, without power supply from the outside of the coil case.

Claims

1. A noncontact electric power receiving device receiving electric power via an electromagnetic field generated by electromagnetic resonance with an electric power transmitting device, comprising:

an electric power receiving unit receiving electric power transmitted from said electric power transmitting device by electromagnetic resonance;

a case housing said electric power receiving unit therein; and

electrical equipment installed within said case, said electrical equipment being different from said electric power receiving unit,

said electrical equipment including;

an electric power receiving antenna receiving the electric power from said electromagnetic field produced during said transmission of said electric power from said electric power transmitting device to said electric power receiving unit, and

an electric load using the electric power received by said electric power receiving antenna.

2. The noncontact electric power receiving device according to claim 1, wherein said case has an electromagnetic shielding material configured to prevent leakage of said electromagnetic field from said case.

3. The noncontact electric power receiving device according to claim 2, wherein said electromagnetic shielding material is provided with an opening in a surface of said case facing said electric power transmitting device.

4. The noncontact electric power receiving device according to claim 2, wherein said electrical equipment further includes a rectifier receiving and rectifying the electric power received by said electric power receiving antenna.

5. The noncontact electric power receiving device according to claim 4, wherein said electric load includes at least one of an indication device, a cooling device, a temperature detection device, and an electrically powered pump.

6. A noncontact electric power feeding system feeding electric power from a power source of an electric power transmitting device to an electric power receiving device via an electromagnetic field generated by electromagnetic resonance, said electric power receiving device including the noncontact electric power receiving device according to claim 1.

7. A noncontact electric power transmitting device transmitting electric power from a power source to an electric power receiving device via an electromagnetic field generated by electromagnetic resonance with said electric power receiving device, comprising:

an electric power transmitting unit transmitting said electric power to said electric power receiving device by electromagnetic resonance;

a case housing said electric power transmitting unit therein; and

electrical equipment installed within said case, said electrical equipment being different from said electric power transmitting unit,

said electrical equipment including;

an electric power receiving antenna receiving the electric power from said electromagnetic field produced during transmission of said electric power from said electric power transmitting unit to said electric power receiving device, and

an electric load using the electric power received by said electric power receiving antenna.

8. The noncontact electric power transmitting device according to claim 7, wherein said case has an electromagnetic shielding material configured to prevent leakage of said electromagnetic field from said case.

9. The noncontact electric power transmitting device according to claim 8, wherein said electromagnetic shielding material is provided with an opening in a surface of said case facing said electric power receiving device.

10. The noncontact electric power transmitting device according to claim 8, wherein said electrical equipment further includes a rectifier receiving and rectifying the electric power received by said electric power receiving antenna.

11. The noncontact electric power transmitting device according to claim 10, wherein said electric load includes at least one of an indication device, a cooling device, a temperature detection device, and an electrically powered pump.

12. A noncontact electric power feeding system feeding electric power from a power source of an electric power transmitting device to an electric power receiving device via an electromagnetic field generated by electromagnetic resonance, said electric power transmitting device including the noncontact electric power transmitting device according to claim 7.

13. A vehicle, comprising:

a noncontact electric power receiving device receiving electric power from a power source external to said vehicle via an electromagnetic field generated by electromagnetic resonance with an electric power transmitting device external to said vehicle, and

an electrical drive apparatus receiving the electric power received by said noncontact electric power receiving device to generate a driving force for traveling said vehicle,

said noncontact electric power receiving device including;

an electric power receiving unit receiving the electric power transmitted from said electric power transmitting device by electromagnetic resonance,

a case housing said electric power receiving unit therein, and

electrical equipment installed within said case, said electrical equipment being different from said electric power receiving unit,

said electrical equipment including;

an electric power receiving antenna receiving the electric power from said electromagnetic field produced during transmission of said electric power from said electric power transmitting device to said electric power receiving unit, and

an electric load using the electric power received by said electric power receiving antenna.

14. The vehicle according to claim 13, wherein

said case has an electromagnetic shielding material configured to prevent leakage of said electromagnetic field from said case, and

said electromagnetic shielding material is provided with an opening in a surface of said case facing said electric power transmitting device.

15. The vehicle according to claim 14, wherein

said electrical equipment further includes a rectifier receiving and rectifying the electric power received by said electric power receiving antenna, and

said electric load includes at least one of an indication device, a cooling device, a temperature detection device, and an electrically powered pump.