POWER-FEED DEVICE

• US 20130009462A1
• Filed: 03/10/2011
• Published: 01/10/2013
• Est. Priority Date: 03/23/2010
• Status: Abandoned Application

• Current Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Original Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Inventors: Amano, Yasushi, Ichikawa, Shinji
• Application Number:
  US13/577,689
• Publication Number:
  US 20130009462A1
• Time in Patent Office: Days
• US Class Current: 307/9.1
• CPC Class Codes: B60L 5/005 without mechanical contact between the collector and the power supply line
• 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: B60M 1/36 Single contact pieces along the line for power supply
• 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 50/10 using inductive coupling
• CPC Class Codes: H02J 50/12 of the resonant type
• CPC Class Codes: H02J 50/402 the two or more transmitting or the two or more receiving devices being integrated in the same unit, e.g. power mats with several coils or antennas with several sub-antennas
• 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

Disclosed is a vehicle charging system that includes a plurality of primary self-resonance coils provided on a road side and a plurality of secondary self-resonance coils provided on a vehicle. Power is fed from the primary self-resonance coils to the secondary self-resonance coils. Each primary self-resonance coil has a different resonance frequency from the adjacent primary self-resonance coils. Each secondary self-resonance coil has a different resonance frequency from the adjacent secondary self-resonance coils.

Claims

1. A power-transmitting device comprising:

a plurality of primary coils which transmit electric power to a mobile unit in a non-contacting manner, wherein

the plurality of primary coils include a plurality of first coils having a predetermined resonance frequency and a plurality of second coils having another resonance frequency different from that of the first coils, and

the first coil and the second coil are alternately placed in a predetermined direction.

2. The power-transmitting device according to claim 1, wherein

the predetermined direction is a direction of movement of the mobile unit.

3. The power-transmitting device according to claim 1, wherein

the plurality of primary coils are arranged in one line along the predetermined direction.

4. The power-transmitting device according to claim 1, wherein

the first coil and the second coil have one or more of a radius, a length in an axial direction, and a number of windings different from each other.

5. The power-transmitting device according to claim 1, wherein

capacitors having different capacitances from each other are connected to the first coil and the second coil.

6. A mobile unit comprising:

a plurality of secondary coils which receive electric power from a power-transmitting device in a non-contacting manner, wherein

the plurality of secondary coils include a plurality of third coils having a predetermined resonance frequency and a plurality of fourth coils having another resonance frequency different from that of the third coil, and

the third coil and the fourth coil are alternately placed in a predetermined direction.

7. The mobile unit according to claim 6, wherein

the predetermined direction is a direction in which the mobile unit moves.

8. The mobile unit according to claim 6, wherein

the plurality of secondary coils are arranged in one line along the predetermined direction.

9. The mobile unit according to claim 6, wherein

the third coil and the fourth coil have one or more of a radius, a length in an axial direction, and a number of windings different from each other.

10. The mobile unit according to claim 6, wherein

capacitors having different capacitances from each other are connected to the third coil and the fourth coil.

11. A power-feed device which transmits electric power from a power-transmitting device to a mobile unit in a non-contacting manner, wherein

the power-transmitting device includes a plurality of first coils having a predetermined resonance frequency and a plurality of second coils having another resonance frequency different from that of the first coils,

the mobile unit includes a plurality of third coils having a predetermined resonance frequency and a plurality of fourth coils having another resonance frequency different from that of the third coils,

the first coil and the second coil are alternately placed in a predetermined direction, and

the third coil and the fourth coil are alternately placed in a predetermined direction.

12. The power-feed device according to claim 11, wherein

the predetermined direction in which the first coil and the second coil are placed and the predetermined direction in which the third coil and the fourth coil are placed are a direction in which the mobile unit moves.

13. The power-feed device according to claim 11, wherein

the plurality of primary coils are arranged in one line along the predetermined direction, and

the plurality of secondary coils are arranged in one line along the predetermined direction.

14. The power-feed device according to claim 11, wherein

the first coil and the second coil have one or more of a radius, a length in an axial direction, and a number of windings different from each other, and

the third coil and the fourth coil have one or more of a radius, a length in an axial direction, and a number of windings different from each other.

15. The power-feed device according to claim 11, wherein

capacitors having different capacitances from each other are connected to the first coil and the second coil, and

capacitors having different capacitances from each other are connected to the third coil and the fourth coil.