Vehicle and external power feeding apparatus

• US 9,440,543 B2
• Filed: 02/15/2011
• Issued: 09/13/2016
• 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
• Primary Examiner(s): Tran, Thienvu
• Assistant Examiner(s): Sun, Pinping
• Application Number:
  US13/990,564
• Publication Number:
  US 20130313913A1
• Time in Patent Office: 2,037 Days
• US Class Current: 1/1
• 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; and

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

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

said vehicle self-resonant coil being formed to extend along a circumference of a winding center, centered about the winding center, the number of windings of said vehicle self-resonant coil being an odd number,

a distance between the center of said vehicle and an anti-node of said vehicle self-resonant coil being shorter than the distance between said winding center and the center of said vehicle, the anti-node of said vehicle self-resonant coil being 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,

said anti-node being located at a middle of a current path of said resonant circuit,

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

2. 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.

3. 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.

4. An external power feeding apparatus provided at a parking space where said vehicle according to claim 3 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,

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 being aligned in a height direction, the anti-node of said facility self-resonant coil being 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.

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

6. An external power feeding apparatus provided at a parking space where said vehicle according to claim 1 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,

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 being aligned in a height direction, the anti-node of said facility self-resonant coil being 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.

7. 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; and

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

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

said vehicle self-resonant coil being formed to extend along a circumference of a winding center, centered about the winding center, the number of windings of said vehicle self-resonant coil being an even number,

a distance between the center of said vehicle and an anti-node of said vehicle self-resonant coil being shorter than the distance between said winding center and the center of said vehicle, the anti-node of said vehicle self-resonant coil being 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,

said anti-node being located at a middle of a current path of said resonant circuit,

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

8. An external power feeding apparatus provided at a parking space where said vehicle according to claim 7 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,

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 being aligned in a height direction, the anti-node of said facility self-resonant coil being 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.