INDUCTIVE POWER SUPPLY SYSTEM WITH OVERLAPPING COILS

• US 20110273025A1
• Filed: 10/19/2009
• Published: 11/10/2011
• Est. Priority Date: 10/20/2008
• Status: Active Grant

• Current Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Original Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Inventors: Amano, Yasushi, Ichikawa, Shinji
• Granted Patent: US 8,482,161 B2
• Time in Patent Office: Days
• US Class Current: 307/104
• CPC Class Codes: B60L 53/12 Inductive energy transfer
• 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 50/10 using inductive coupling
• CPC Class Codes: H02J 50/12 of the resonant type
• CPC Class Codes: H02J 50/80 involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices
• CPC Class Codes: H02J 50/90 involving detection or optimisation of position, e.g. alignment
• CPC Class Codes: H02J 7/0049 Detection of fully charged condition
• CPC Class Codes: H02J 7/00712 the cycle being controlled or terminated in response to electric parameters
• 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 90/12 Electric charging stations
• CPC Class Codes: Y02T 90/14 Plug-in electric vehicles

Abstract

A power supply coil is provided in a specified area of a power supply station, and a power receiving coil is provided on a vehicle. The power supply coil has a rectangular shape that is long in direction y and the power receiving coil has a rectangular shape that is long in direction x when viewed from the direction of the coil axis. The resonant frequency of the power receiving coil coil is set to be the same as the resonant frequency of the power supply coil.

Claims

1-12. -12. (canceled)

13. A power supply system comprising:

a power supply coil provided in a specified area of a facility; and

a power receiving coil which has the same resonant frequency as the power supply coil and is provided on a movable body,

wherein when the movable body is positioned within the specified area, the power receiving coil faces the power supply coil, and the power receiving coil overlaps with or is near the power supply coil when viewed from the direction of the coil axis.

14. The power supply system according to claim 13, wherein the power supply coil has a shape with a long axis and a short axis when viewed from the direction of the coil axis;

the power receiving coil has a shape with a long axis and a short axis when viewed from the direction of the coil axis; and

the power supply coil and the power receiving coil are arranged so as to intersect each other when viewed from the direction of the coil axis when the movable body is positioned inside the specified area.

15. The power system according to claim 13, wherein the power receiving coil has a shape in which the long axis is shorter than the long axis of the power supply coil when viewed from the direction of the coil axis;

and the power supply coil and the power receiving coil are arranged such that the power receiving coil overlaps with or is near the power supply coil when viewed from the direction of the coil axis when the movable body is in the specified area.

16. The power supply system according to claim 13, wherein the power supply coil has a regular polygon shape or a circular shape;

and the power supply coil and the power receiving coil are arranged such that the power receiving coil overlaps with or is near the power supply coil when viewed from the direction of the coil axis when the movable body is in the specified area.

17. The power supply system according to claim 16, wherein the power supply coil has a shape with a long axis and a short axis when viewed from the direction of the coil axis;

and the power receiving coil is provided on the movable body so as to be able to move in a direction that intersects the direction of the long axis of the power supply coil.

18. The power supply system according to claim 13, wherein the power supply coil is provided standing upright from the specified area, and the power receiving coil is provided on a rear portion of the movable body.

19. The power supply system according to claim 13, wherein the power supply coil is provided standing upright from the specified area, and the power receiving coil is provided on a wheel of the movable body.

20. The supply system according to claim 13, wherein the power supply coil is provided embedded in the specified area, and the power receiving coil is provided on an underneath portion of the movable body.

21. The power supply system according to claim 13, wherein the movable body is a vehicle.