POWER TRANSMISSION SYSTEM, VEHICLE AND POWER SUPPLY FACILITY

• US 20130127409A1
• Filed: 11/09/2012
• Published: 05/23/2013
• Est. Priority Date: 11/18/2011
• Status: Abandoned Application

• Current Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Original Assignee: Shinji Ichikawa
• Inventors: ICHIKAWA, Shinji
• Application Number:
  US13/673,652
• Publication Number:
  US 20130127409A1
• Time in Patent Office: Days
• US Class Current: 320/108
• 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: 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: 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

Power is transmitted from a power supply facility to a vehicle in a contact-less manner. A control device detects a distance between a power transmission unit of the power supply facility and a power receiving unit of the vehicle. A display unit displays a graphic in a display pattern which varies in accordance with the distance detected by the detection unit.

Claims

1. A power transmission system in which power is transmitted from a power supply facility to a vehicle in a contactless manner, comprising:

a detection unit that detects a distance between a power transmission unit of the power supply facility and a power receiving unit of the vehicle; and

a display unit that displays a graphic in a display pattern that varies in accordance the distance detected by the detection unit.

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

the display unit varies the display pattern accompanying a movement of the vehicle.

3. The power transmission system according to claim 1, wherein

the display unit varies a size of the graphic that is concentric with a graphic that denotes the power receiving unit, in accordance with the distance detected by the detection unit.

4. The power transmission system according to claim 3, wherein

the display unit varies the size of the graphic to be larger as the distance increases.

5. The power transmission system according to claim 3, wherein

the display unit varies the size of the graphic to be smaller as the distance decreases.

6. The power transmission system according to claim 1, wherein

the display unit varies a brightness of the graphic in accordance with the distance detected by the detection unit.

7. The power transmission system according to claim 1, wherein

the display unit varies a flashing rate of the graphic in accordance with the distance detected by the detection unit.

8. The power transmission system according to claim 1, further comprising:

a notification unit that generates a notification sound, a magnitude of which varies in accordance with the distance detected by the detection unit.

9. The power transmission system according to claim 1, wherein

a difference between a natural frequency of the power transmission unit and a natural frequency of the power receiving unit is no greater than ±

10% of the natural frequency of the power transmission unit or the natural frequency of the power receiving unit.

10. The power transmission system according to claim 1, wherein

a coupling coefficient between the power transmission unit and the power receiving unit is no greater than 0.1.

11. The power transmission system according to claim 1, wherein

the power receiving unit receives power from the power transmission unit through at least one of (i) a magnetic field that is formed between the power receiving unit and the power transmission unit and that oscillates at a specific frequency, and (ii) an electric field that is formed between the power receiving unit and the power transmission unit and that oscillates at a specific frequency.

12. A vehicle that receives power from a power supply facility in a contactless manner, comprising:

a power receiving unit that receives power from a power transmission unit of the power supply facility in a contact-less manner;

a detection unit that detects a distance between the power receiving unit and the power transmission unit; and

a display unit that displays a graphic in a display pattern which varies in accordance the distance detected by the detection unit.

13. The vehicle according to claim 12, wherein

the display unit varies the display pattern accompanying a movement of the vehicle.

14. The vehicle according to claim 12, wherein

the display unit varies a size of the graphic that is concentric with a graphic that denotes the power receiving unit, in accordance with the distance detected by the detection unit.

15. The vehicle according to claim 14, wherein

the display unit varies the size of the graphic to be larger as the distance increases.

16. The vehicle according to claim 14, wherein

the display unit varies the size of the graphic to be smaller as the distance decreases.

17. The vehicle according to claim 12, wherein

the display unit varies a brightness of the graphic in accordance with the distance detected by the detection unit.

18. The vehicle according to claim 12, wherein

the display unit varies a flashing rate of the graphic in accordance with the distance detected by the detection unit.

19. The vehicle according to claim 12, further comprising:

a notification unit that generates a notification sound, wherein a magnitude of the notification sound varies in accordance with the distance detected by the detection unit.

20. The vehicle according to claim 12, wherein

a difference between a natural frequency of the power transmission unit and a natural frequency of the power receiving unit is no greater than ±

10% of the natural frequency of the power transmission unit or the natural frequency of the power receiving unit.

21. The vehicle according to claim 12, wherein

a coupling coefficient between the power transmission unit and the power receiving unit is no greater than 0.1.

22. The vehicle according to claim 12, wherein

the power receiving unit receives power from the power transmission unit through at least one of a magnetic field that is formed between the power receiving unit and the power transmission unit and that oscillates at a specific frequency, and an electric field that is formed between the power receiving unit and the power transmission unit and that oscillates at a specific frequency.

23. A power supply facility that supplies power to a vehicle in a contact-less manner, comprising:

a power transmission unit that transmits power to a power receiving unit of the vehicle in a contact-less manner;

a detection unit that detects a distance between the power transmission unit and the power receiving unit; and

a display unit that displays a graphic in a display pattern which varies in accordance with the distance detected by the detection unit.