Electrical powered vehicle and power feeding device for vehicle

• US 9,024,575 B2
• Filed: 10/18/2011
• Issued: 05/05/2015
• Est. Priority Date: 10/25/2007
• Status: Active Grant

• Current Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Original Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Inventors: Oyobe, Hichirosai, Ishikawa, Tetsuhiro
• Primary Examiner(s): Tso, Edward
• Assistant Examiner(s): TORRES RUIZ, JOHALI ALEJANDRA
• Application Number:
  US13/275,925
• Publication Number:
  US 20120032525A1
• Time in Patent Office: 1,295 Days
• Field of Search: 320/108
• US Class Current: 320/108
• CPC Class Codes: B60L 2210/14 Boost 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 2220/14 Synchronous machines
• CPC Class Codes: B60L 2240/12 Speed
• CPC Class Codes: B60L 2270/147 electro magnetic [EMI]
• 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 53/122 Circuits or methods for driving the primary coil, e.g. supplying electric power to the coil
• 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 27/006 with special arrangement or spacing of turns of the winding(s), e.g. to produce desired self-resonance
• CPC Class Codes: H01F 27/38 Auxiliary core members; Auxiliary coils or windings
• 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: 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
• CPC Class Codes: Y02T 90/16 : Information or communication technologies improving the operation of electric vehicles

Abstract

An electrical powered vehicle includes a secondary self-resonant coil, a secondary coil, a rectifier, and a power storage device. The secondary self-resonant coil is configured to be magnetically coupled with a primary self-resonant coil of a power feeding device by magnetic field resonance, and allow reception of high frequency power from the primary self-resonant coil. The secondary coil is configured to allow reception of electric power from the secondary self-resonant coil by electromagnetic induction. The rectifier rectifies the electric power received by the secondary coil. The power storage device stores the electric power rectified by the rectifier.

Claims

1. A power feeding device for an electrical powered vehicle, comprising:

a high frequency power driver configured to convert electric power received from a power source into high frequency power,

a transmitting coil configured to be magnetically coupled with a receiving coil mounted on said vehicle by a magnetic field, and to transmit said high frequency power received from said high frequency power driver, and

a reflective wall formed at a rear side of said transmitting coil with respect to a power transferring direction from said transmitting coil, to allow reflection of a magnetic flux output from said transmitting coil in said power transferring direction, the transmitting coil and the reflective wall being arranged spaced apart from each other.

2. The power feeding device for an electrical powered vehicle according to claim 1, wherein

said transmitting coil is disposed in proximity to the ground, and

at least a portion of said reflective wall is disposed at a side deeper in the ground than said transmitting coil.

3. The power feeding device for an electrical powered vehicle according to claim 1, further comprising:

a communication device configured to allow reception of a detection value of reception power transmitted from a vehicle receiving power supply from the power feeding device for a vehicle, and

a control device for adjusting a frequency of said high frequency power by controlling said high frequency power driver such that said reception power is at a maximum based on the detection value of said reception power received by said communication device.

4. The power feeding device for an electrical powered vehicle according to claim 1, further comprising:

a communication device configured to allow reception of information transmitted from a vehicle receiving power supply from the power feeding device for a vehicle, and

a control device for controlling said high frequency power driver such that said high frequency power is generated according to the number of vehicles receiving power supply from the power feeding device for a vehicle, based on said information received by said communication device.

5. The power feeding device for an electrical powered vehicle according to claim 4, wherein said control device stops said high frequency power driver when determination is made that there is no vehicle receiving power supply from the power feeding device for a vehicle.

6. The power feeding device for an electrical powered vehicle according to claim 1, further comprising an adjustment device configured to allow adjustment of a resonant frequency of said transmitting coil by modifying at least one of a capacitance and inductance of said transmitting coil.

7. The power feeding device for an electrical powered vehicle according to claim 6, further comprising:

a communication device configured to allow reception of a detection value of reception power transmitted from a vehicle receiving power supply from the power feeding device for a vehicle, and

a control device controlling said adjustment device such that said reception power is at a maximum based on the detection value of said reception power received by said communication device.

8. The power feeding device for an electrical powered vehicle according to claim 1, further comprising:

a primary coil for receiving the high frequency power from said high frequency power driver and transmitting the received high frequency power to said transmitting coil by electromagnetic induction, and

a communication device configured to allow reception of a detection value of reception power transmitted from a vehicle receiving power supply from the power feeding device for a vehicle,

wherein a plurality of sets of said transmitting coil and said primary coil are provided,

the power feeding device further comprising a selection device for selecting, among the plurality of primary coils, a primary coil receiving said high frequency power from said high frequency power driver, and connecting the selected primary coil with said high frequency power driver such that said reception power is at a maximum based on the detection value of said reception power received by said communication device.

9. The power feeding device for an electrical powered vehicle according to claim 1, further comprising:

a primary coil for receiving the high frequency power from said high frequency power driver and transmitting the received high frequency power to said transmitting coil by electromagnetic induction,

wherein a plurality of sets of said transmitting coil and said primary coil are provided, and

the plurality of primary coils are connected parallel with each other with respect to said high frequency power driver.

10. A power feeding device for an electrical powered vehicle, comprising:

a high frequency power driver configured to convert electric power received from a power source into high frequency power,

a primary LC resonator configured to be magnetically coupled with a secondary LC resonator mounted on said vehicle by a magnetic field, and to transmit said high frequency power received from said high frequency power driver, and

reflective means formed at a rear side of said primary LC resonator with respect to a power transferring direction from said primary LC resonator, to allow reflection of a magnetic flux output from said primary LC resonator in said power transferring direction, the primary LC resonator and the reflective means being arranged spaced apart from each other.

11. The power feeding device for an electrical powered vehicle according to claim 10, wherein

said primary LC resonator is disposed in proximity to the ground, and

at least a portion of said reflective means is disposed at a side deeper in the ground than said primary LC resonator.

12. The power feeding device for an electrical powered vehicle according to claim 10, further comprising:

a communication device configured to allow reception of a detection value of reception power transmitted from a vehicle receiving power supply from the power feeding device for a vehicle, and

a control device for adjusting a frequency of said high frequency power by controlling said high frequency power driver such that said reception power is at a maximum based on the detection value of said reception power received by said communication device.

13. The power feeding device for an electrical powered vehicle according to claim 10, further comprising:

a communication device configured to allow reception of information transmitted from a vehicle receiving power supply from the power feeding device for a vehicle, and

a control device for controlling said high frequency power driver such that said high frequency power is generated according to the number of vehicles receiving power supply from the power feeding device for a vehicle, based on said information received by said communication device.

14. The power feeding device for an electrical powered vehicle according to claim 13, wherein said control device stops said high frequency power driver when determination is made that there is no vehicle receiving power supply from the power feeding device for a vehicle.

15. The power feeding device for an electrical powered vehicle according to claim 10, further comprising an adjustment device configured to allow adjustment of a resonant frequency of said primary LC resonator by modifying at least one of a capacitance and inductance of said primary LC resonator.

16. The power feeding device for an electrical powered vehicle according to claim 15, further comprising:

a communication device configured to allow reception of a detection value of reception power transmitted from a vehicle receiving power supply from the power feeding device for a vehicle, and

a control device controlling said adjustment device such that said reception power is at a maximum based on the detection value of said reception power received by said communication device.

17. The power feeding device for an electrical powered vehicle according to claim 10, further comprising:

a primary coil for receiving the high frequency power from said high frequency power driver and transmitting the received high frequency power to said primary LC resonator by electromagnetic induction, and

a communication device configured to allow reception of a detection value of reception power transmitted from a vehicle receiving power supply from the power feeding device for a vehicle,

wherein a plurality of sets of said primary LC resonator and said primary coil are provided,

the power feeding device further comprising a selection device for selecting, among the plurality of primary coils, a primary coil receiving said high frequency power from said high frequency power driver, and connecting the selected primary coil with said high frequency power driver such that said reception power is at a maximum based on the detection value of said reception power received by said communication device.

18. The power feeding device for an electrical powered vehicle according to claim 10, further comprising:

a primary coil for receiving the high frequency power from said high frequency power driver and transmitting the received high frequency power to said primary LC resonator by electromagnetic induction,

wherein a plurality of sets of said primary LC resonator and said primary coil are provided, and

the plurality of primary coils are connected parallel with each other with respect to said high frequency power driver.