ELECTRICAL POWERED VEHICLE AND POWER FEEDING DEVICE FOR VEHICLE

• US 20150210170A1
• Filed: 04/10/2015
• Published: 07/30/2015
• Est. Priority Date: 10/25/2007
• Status: Abandoned Application

• Current Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Original Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Inventors: OYOBE, Hichirosai, ISHIKAWA, Tetsuhiro
• Application Number:
  US14/683,668
• Publication Number:
  US 20150210170A1
• Time in Patent Office: Days
• US Class Current: 1/1
• 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

A power receiving device mounted on an electrical powered vehicle includes a receiving coil and a reflective wall. The receiving coil is configured to be magnetically coupled with a transmitting coil external to the vehicle by a magnetic field, and to receive electric power from the transmitting coil. The reflective wall is formed at a rear side of the receiving coil with respect to a power receiving direction from the transmitting coil, to allow reflection of a magnetic flux output from the transmitting coil to the receiving coil. The receiving coil and the reflective wall are arranged spaced apart from each other.

Claims

1. A power receiving device mounted on an electrical powered vehicle, the power receiving device comprising:

a receiving coil configured to be magnetically coupled with a transmitting coil external to the vehicle by a magnetic field, and to receive electric power from the transmitting coil; and

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

2. The power receiving device according to claim 1, wherein at least a portion of the reflective wall is disposed at a side farther away from a body face of the vehicle located closest to the receiving coil, than the receiving coil.

3. The power receiving device according to claim 1, wherein the receiving coil is disposed at a lower portion of a body of the vehicle, and

at least a portion of the reflective wall is disposed at an upper side of the body of the vehicle relative to the receiving coil.

4. The power receiving device according to claim 1, wherein the vehicle includes:

a rectifier configured to rectify electric power received by the receiving coil; and

a power storage device configured to store electric power rectified by the rectifier, wherein

the number of windings of the receiving coil is set based on a voltage of the power storage device, a distance between the transmitting coil and the receiving coil, and a resonant frequency of the transmitting coil and the receiving coil.

5. The power receiving device according to claim 1, further comprising an adjustment device configured to allow adjustment of a resonant frequency of the receiving coil by modifying at least one of a capacitance and an inductance of the receiving coil.

6. The power receiving device according to claim 5, further comprising:

an electric power detection device configured to detect electric power received by the receiving coil; and

a control device configured to control the adjustment device such that electric power detected by the electric power detection device is at a maximum.

7. The power receiving device according to claim 1, further comprising:

an electric power detection device configured to detect electric power received by the receiving coil; and

a communication device configured to allow transmission of a detection value of electric power detected by the electric power detection device to a power feeding device external to the vehicle and including the transmitting coil.

8. The power receiving device according to claim 1, wherein the receiving coil is disposed at a lower portion of a body of the vehicle.

9. The power receiving device according to claim 1, wherein the vehicle includes a rectifier configured to rectify electric power received by the receiving coil,

a plurality of the receiving coils are provided, and the plurality of receiving coils are connected to the rectifier parallel with each other.

10. The power receiving device according to claim 1, wherein the vehicle includes:

a rectifier configured to rectify electric power received by the receiving coil; and

a power storage device configured to store electric power rectified by the rectifier,

the power receiving device further comprising a voltage converter arranged between the receiving coil and the power storage device to carry out a boosting operation or a down-converting operation based on a voltage of the power storage device.

11. The power receiving device according to claim 1, wherein the vehicle includes:

a rectifier configured to rectify electric power received by the receiving coil;

a power storage device configured to store electric power rectified by the rectifier; and

an electric motor configured to receive supply of electric power from the power storage device to generate a driving force of the vehicle,

the power receiving device further comprising;

a first relay disposed between the power storage device and the electric motor; and

a second relay disposed between the power storage device and the receiving coil,

wherein, when the first relay is turned on and the electric motor is driven by electric power of the power storage device, the second relay is turned on together with the first relay.