POWER TRANSMISSION DEVICE, POWER RECEPTION DEVICE AND POWER TRANSFER SYSTEM

• US 20140111021A1
• Filed: 06/30/2011
• Published: 04/24/2014
• Est. Priority Date: 06/30/2011
• Status: Abandoned Application

• Current Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Original Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Inventors: Nakamura, Koji
• Application Number:
  US14/126,345
• Publication Number:
  US 20140111021A1
• Time in Patent Office: Days
• US Class Current: 307/104
• CPC Class Codes: B60L 2210/10 DC to DC converters
• CPC Class Codes: B60L 2210/30 AC to DC converters
• CPC Class Codes: B60L 2210/40 DC to AC converters
• CPC Class Codes: B60L 50/16 with provision for separate direct mechanical propulsion
• CPC Class Codes: B60L 50/61 by batteries charged by engine-driven generators, e.g. series hybrid electric vehicles
• CPC Class Codes: B60L 53/12 Inductive energy transfer
• 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: B60L 53/36 by positioning the vehicle
• CPC Class Codes: B60M 7/003 for vehicles using stored power (e.g. charging stations)
• 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 2310/48 for electric vehicles [EV] or hybrid vehicles [HEV]
• 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 10/62 Hybrid vehicles
• 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 10/72 Electric energy management in electromobility
• CPC Class Codes: Y02T 90/12 Electric charging stations
• CPC Class Codes: Y02T 90/14 Plug-in electric vehicles

Abstract

A power transmission device for use in a power transfer system in which resonance through an electromagnetic field is used includes a power-transmission-side electromagnetic induction coil, a power-transmission-side resonance unit, and a power-transmission-side shield unit surrounding the power-transmission-side electromagnetic induction coil and the power-transmission-side resonance unit. The power-transmission-side electromagnetic induction coil and the power-transmission-side resonance unit are disposed in an identical plane.

Claims

1. A power transmission device for use in a power transfer system in which resonance through an electromagnetic field is used, comprising:

a power-transmission-side electromagnetic induction coil;

a power-transmission-side resonance unit; and

a power-transmission-side shield unit surrounding said power-transmission-side electromagnetic induction coil and said power-transmission-side resonance unit,

said power-transmission-side electromagnetic induction coil and said power-transmission-side resonance unit being disposed in an identical plane.

2. The power transmission device according to claim 1, wherein

said power-transmission-side resonance unit has a power-transmission-side resonance coil, and

said power-transmission-side electromagnetic induction coil and said power-transmission-side resonance coil are disposed in an identical plane.

3. The power transmission device according to claim 2, wherein said power-transmission-side resonance coil (24)coil

said power-transmission-side electromagnetic induction coil, said power-transmission-side resonance coil and said power-transmission-side shield unit are embedded under said vehicle placement surface.

5. The power transmission device according to claim 4,

comprising a plurality of slots recessed from said vehicle placement surface, wherein

said power-transmission-side electromagnetic induction coil, said power-transmission-side resonance coil and said power-transmission-side shield unit are disposed in said slots, respectively.

6. The power transmission device according to claim 4, wherein

said vehicle placement surface is a surface of a motor pool having a reinforcing member embedded in the ground, and

said power-transmission-side shield unit is connected to said reinforcing member.

7. A power reception device for use in a power transfer system in which resonance through an electromagnetic field is used, comprising:

a power-receiving-side electromagnetic induction coil;

a power-receiving-side resonance unit; and

a power-receiving-side shield unit surrounding said power-receiving-side electromagnetic induction coil and said power-receiving-side resonance unit,

said power-receiving-side electromagnetic induction coil and said power-receiving-side resonance unit being disposed in an identical plane.

8. The power reception device according to claim 7, wherein

said power-receiving-side resonance unit has a power-receiving-side resonance coil, and

said power-receiving-side electromagnetic induction coil and said power-receiving-side resonance coil are disposed in an identical plane.

9. The power reception device according to claim 8,

wherein said power-receiving-side resonance coil is disposed on the inner side of said power-receiving-side electromagnetic induction coil.

10. A power transfer system comprising a power transmission device and a power reception device,

said power transmission device including

a power-transmission-side electromagnetic induction coil,

a power-transmission-side resonance unit, and

a power-transmission-side shield unit surrounding said power-transmission-side electromagnetic induction coil and said power-transmission-side resonance unit,

said power reception device including

a power-receiving-side electromagnetic induction coil,

a power-receiving-side resonance unit configured to resonate with said power-transmission-side resonance unit through an electromagnetic field, and

a power-receiving-side shield unit surrounding said power-receiving-side electromagnetic induction coil and said power-receiving-side resonance unit, and

said power-transmission-side electromagnetic induction coil and said power-transmission-side resonance unit being disposed in an identical plane.

11. The power transfer system according to claim 10, wherein

said power-transmission-side resonance unit has a power-transmission-side resonance coil, and

said power-transmission-side electromagnetic induction coil and said power-transmission-side resonance coil are disposed in an identical plane.

12. The power transfer system according to claim 11, wherein said power-transmission-side resonance coil is disposed on the inner side of said power-transmission-side electromagnetic induction coil.

13. The power transfer system according to claim 12, wherein

said power transmission device is provided at a vehicle placement surface, and

said power-transmission-side electromagnetic induction coil, said power-transmission-side resonance coil and said power-transmission-side shield unit are embedded under said vehicle placement surface.

14. The power transfer system according to claim 13, comprising a plurality of slots recessed from said vehicle placement surface, wherein

said power-transmission-side electromagnetic induction coil, said power-transmission-side resonance coil and said power-transmission-side shield unit are disposed in said slots, respectively.

15. The power transfer system according to claim 13, wherein

said vehicle placement surface is a surface of a motor pool having a reinforcing member embedded in the ground, and

said power-transmission-side shield unit is a connected to said reinforcing member.

16. A power transfer system comprising a power transmission device and a power reception device,

said power transmission device including

a power-transmission-side electromagnetic induction coil,

a power-transmission-side resonance unit, and

a power-transmission-side shield unit surrounding said power-transmission-side electromagnetic induction coil and said power-transmission-side resonance unit,

said power reception device including

a power-receiving-side electromagnetic induction coil,

a power-receiving-side resonance unit configured to resonate with said power-transmission-side resonance unit through an electromagnetic field, and

a power-receiving-side shield unit surrounding said power-receiving-side electromagnetic induction coil and said power-receiving-side resonance unit, and

said power-receiving-side electromagnetic induction coil and said power-receiving-side resonance unit being disposed in an identical plane.

17. The power transfer system according to claim 16, wherein

said power-receiving-side resonance unit has a power-receiving-side resonance coil, and

said power-receiving-side electromagnetic induction coil and said power-receiving-side resonance coil are disposed in an identical plane.

18. The power transfer system according to claim 17, wherein said power-receiving-side resonance coil is disposed on the inner side of said power-receiving-side electromagnetic induction coil.

19. A power transfer system comprising a power transmission device and a power reception device,

said power transmission device including

a power-transmission-side electromagnetic induction coil,

a power-transmission-side resonance unit, and

a power-transmission-side shield unit surrounding said power-transmission-side electromagnetic induction coil and said power-transmission-side resonance unit,

said power reception device including

a power-receiving-side electromagnetic induction coil,

a power-receiving-side resonance unit configured to resonate with said power-transmission-side resonance unit through an electromagnetic field, and

a power-receiving-side shield unit surrounding said power-receiving-side electromagnetic induction coil and said power-receiving-side resonance unit,

said power-transmission-side electromagnetic induction coil and said power-transmission-side resonance unit being disposed in an identical plane, and

said power-receiving-side electromagnetic induction coil and said power-receiving-side resonance unit being disposed in an identical plane.

20. The power transfer system according to claim 19, wherein

said power-transmission-side resonance unit has a power-transmission-side resonance coil,

said power-transmission-side electromagnetic induction coil and said power-transmission-side resonance coil are disposed in an identical plane,

said power-receiving-side resonance unit has a power-receiving-side resonance coil, and

said power-receiving-side electromagnetic induction coil and said power-receiving-side resonance coil are disposed in an identical plane.

21. The power transfer system according to claim 20, wherein

said power-transmission-side resonance coil is disposed on the inner side of said power-transmission-side electromagnetic induction coil, and

said power-receiving-side resonance coil is disposed on the inner side of said power-receiving-side electromagnetic induction coil.