VEHICLE AND EXTERNAL POWER FEEDING APPARATUS

• US 20130313913A1
• Filed: 02/15/2011
• Published: 11/28/2013
• Est. Priority Date: 02/15/2011
• Status: Active Grant

• Current Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Original Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Inventors: Ichikawa, Shinji
• Granted Patent: US 9,440,543 B2
• Time in Patent Office: Days
• US Class Current: 307/104
• CPC Class Codes: B60K 1/04 of the electric storage means for propulsion exchanging batteries for electric propulsion of vehicles B60L53/80; for auxiliary purposes only B60R16/04; supplying batteries to, or removing batteries from, vehicles B60S5/06
• CPC Class Codes: B60K 2001/0416 Arrangement in the rear part of the vehicle
• CPC Class Codes: B60L 2210/10 DC to DC 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 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 50/66 Arrangements of batteries
• CPC Class Codes: B60L 53/12 Inductive energy transfer
• 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 53/30 Constructional details of charging stations
• CPC Class Codes: B60L 53/36 by positioning the vehicle
• CPC Class Codes: H01F 38/14 Inductive couplings for wireless supply or distribution of electric power using inductive coupling H02J50/10
• 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

Abstract

A vehicle self-resonant coil provided at a vehicle is formed to extend along a circumference of a winding center, centered about the winding center. The distance between the center of the vehicle and an anti-node of the vehicle self-resonant coil that is the area of the anti-node of AC current flowing through the vehicle self-resonant coil when electromagnetic field resonant coupling is established between the vehicle self-resonant coil and the facility self-resonant coil is shorter than the distance between the winding center and the center of the vehicle.

Claims

1. A vehicle comprising:

a vehicle self-resonant coil establishing electromagnetic field resonant coupling with a facility self-resonant coil provided external to the vehicle, allowing reception of electric power from said facility self-resonant coil,

said vehicle self-resonant coil formed to extend along a circumference of a winding center, centered about the winding center,

a distance between the center of said vehicle and an anti-node of said vehicle self-resonant coil that is an area of an anti-node of AC current flowing through said vehicle self-resonant coil when electromagnetic field resonant coupling is established between said vehicle self-resonant coil and said facility self-resonant coil is shorter than the distance between said winding center and the center of said vehicle.

2. The vehicle according to claim 1, wherein said anti-node is located at a middle of said vehicle self-resonant coil along a length direction from one end to the other end of a conductor wire constituting said vehicle self-resonant.

3. The vehicle according to claim 1, further comprising a capacitor connected to said vehicle self-resonant coil, wherein

a resonant circuit is formed by said vehicle self-resonant coil and said capacitor,

said anti-node is located at a middle of a current path of said resonant circuit.

4. The vehicle according to claim 3, wherein

said capacitor is connected at both ends of said vehicle self-resonant coil,

the number of windings of said vehicle self-resonant coil is an odd number,

said capacitor is arranged at a side opposite to said anti-node relative to said winding center.

5. The vehicle according to claim 3, wherein

said capacitor is connected at both ends of said vehicle self-resonant coil,

the number of windings of said vehicle self-resonant coil is an even number,

the distance between said capacitor and the center of said vehicle is shorter than the distance between said winding center and the center of said vehicle.

6. The vehicle according to claim 1, further comprising a pair of rear side members aligned in a width direction of said vehicle,

wherein, when viewing said rear side members and said vehicle self-resonant coil from above, said vehicle self-resonant coil is arranged between said rear side members.

7. The vehicle according to claim 1, wherein said anti-node is arranged at a central region along a width direction of said vehicle.

8. An external power feeding apparatus provided at a parking space where a vehicle including a vehicle self-resonant coil parks at a predetermined position, said external power feeding apparatus comprising:

a facility self-resonant coil establishing electromagnetic field resonant coupling with said vehicle self-resonant coil to transmit electric power to said vehicle self-resonant coil,

said vehicle self-resonant coil formed winding about a winding center,

a distance between the center of said vehicle and an anti-node of said vehicle self-resonant coil that is an area of an anti-node of AC current flowing through said vehicle self-resonant coil when electromagnetic field resonant coupling is established between said vehicle self-resonant coil and said facility self-resonant coil is shorter than the distance between said winding center and the center of said vehicle, and

when said vehicle parks at said predetermined position, the anti-node of said vehicle self-resonant coil and an anti-node of said facility self-resonant coil that is an area of an anti-node of AC current flowing through said facility self-resonant coil when electromagnetic field resonant coupling is established between said vehicle self-resonant coil and said facility self-resonant coil, are aligned in a height direction.