Electrical powered vehicle and power feeding device for vehicle

• US 20110121778A1
• Filed: 01/25/2011
• Published: 05/26/2011
• 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
• Granted Patent: US 9,180,779 B2
• Time in Patent Office: Days
• 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 a vehicle, comprising:

a high frequency power drive configured to allow conversion of electric power received from a power source into high frequency power that can achieve magnetic field resonance for transmission to a vehicle,

a primary coil for receiving said high frequency power from said high frequency power driver,

a primary self-resonant coil configured to be magnetically coupled with a secondary self-resonant coil mounted on said vehicle by magnetic field resonance, and allow transmission of said high frequency power received from said primary coil by electromagnetic induction to said secondary self-resonant coil,

a communication device configured to allow reception of a detection value of reception power transmitted from said 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.

2. The power feeding device for a vehicle according to claim 1, further comprising reflective means formed at a rear side of said primary self-resonant coil and said primary coil with respect to a power transferring direction from said primary self-resonant coil, for allowing reflection of a magnetic flux output from said primary self-resonant coil in said power transferring direction.

3. A power feeding device for a vehicle, comprising:

a high frequency power drive configured to allow conversion of electric power received from a power source into high frequency power that can achieve magnetic field resonance for transmission to a vehicle,

a primary coil for receiving said high frequency power from said high frequency power driver,

a primary self-resonant coil configured to be magnetically coupled with a secondary self-resonant coil mounted on said vehicle by magnetic field resonance, and allow transmission of said high frequency power received from said primary coil by electromagnetic induction to said secondary self-resonant coil,

an adjustment device configured to allow adjustment of a resonant frequency of said primary self-resonant coil by modifying at least one of a capacitance and inductance of said primary self-resonant coil,

a communication device configured to allow reception of a detection value of reception power transmitted from said vehicle, and

a control device for 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.

4. The power feeding device for a vehicle according to claim 3, further comprising reflective means formed at a rear side of said primary self resonant coil and said primary coil with respect to a power transferring direction from said primary self-resonant coil, for allowing reflection of a magnetic flux output from said primary self-resonant coil in said power transferring direction.