RESONANCE COIL, ELECTRIC POWER TRANSMISSION DEVICE, ELECTRIC POWER RECEIVING DEVICE, AND ELECTRONIC POWER TRANSMISSION SYSTEM

• US 20130320774A1
• Filed: 02/23/2012
• Published: 12/05/2013
• Est. Priority Date: 02/25/2011
• Status: Active Grant

• Current Assignee: Nagoya Institute of Technology, Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Original Assignee: Nagoya Institute of Technology, Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Inventors: Ichikawa, Shinji, Kikuma, Nobuyoshi, Kadoi, Masafumi
• Granted Patent: US 9,595,382 B2
• Time in Patent Office: Days
• US Class Current: 307/104
• 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 53/126 Methods for pairing a vehicle and a charging station, e.g. establishing a one-to-one relation between a wireless power transmitter and a wireless power receiver
• 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 2310/48 for electric vehicles [EV] or hybrid vehicles [HEV]
• CPC Class Codes: H02J 50/12 of the resonant type
• CPC Class Codes: H02J 50/502 the energy repeater being integrated together with the emitter or the receiver
• CPC Class Codes: H02J 7/00 Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
• CPC Class Codes: H02J 7/00034 Charger exchanging data with an electronic device, i.e. telephone, whose internal battery is under charge
• CPC Class Codes: H04B 5/26 using coils
• CPC Class Codes: H04B 5/79 for data transfer in combination with power transfer
• 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 resonance coil includes plural unit coils where directions of magnetic fields which are formed by flowing of electric current are the same, in which the plural unit coils are arranged around a coil center line, and when the resonance coil is seen in a direction of the coil center line, the coil wire that forms the resonance coil is formed so as not to be overlapped.

Claims

1. A resonance coil comprising:

a coil wire that forms plural unit coils where directions of magnetic fields which are formed by flowing of electric current are the same,

wherein the plural unit coils are arranged around a coil center line, and when the resonance coil is seen in a direction of the coil center line, the coil wire is formed so as not to be overlapped.

2. The resonance coil according to claim 1, wherein

the resonance coil includes an outer conductor section that is formed with the coil wire that extends to surround the coil center line and that includes a first connecting end and a second connecting end, and an inner conductor section in which one end is connected to the first connecting end and the other end is connected to the second connecting end and that is arranged within a region that is surrounded by the outer conductor section, and formed with the coil wire,

plural second regions that are surrounded by the inner conductor section and the outer conductor section are formed in a first region that is surrounded by the outer conductor section, and

the unit coil is formed with the outer conductor section and the inner conductor section that surround the second region.

3. The resonance coil according to claim 2, wherein

the outer conductor section is formed by bending the coil wire, and

the inner conductor section is formed by bending the coil wire from the first connecting end and the second connecting end.

4. The resonance coil according to claim 2, wherein

an area in which the plural second regions occupy is larger than an area of third region that is surrounded by the first connecting end, the second connecting end, and the inner conductor section.

5. The resonance coil according to claim 2, wherein

the inner conductor section includes a main section that extends from the outer conductor section toward the coil center line, and

the main section extends to a vicinity of the outer conductor section so as to secure insulation properties with the outer conductor section so that the second region is divided to be formed plurally.

6. The resonance coil according to claim 2, wherein

the inner conductor section includes a main section that extends from the outer conductor section toward the coil center line, and a branch section that extends to branch from the main section and that is formed with the coil wire.

7. The resonance coil according to claim 6, wherein

the outer conductor section includes a first side section in which the first connecting end and the second connecting end are formed, a second side section in which one end is connected to one end of the first side section, a third side section in which one end is connected to the other end of the first side section, and a fourth side section that connects between the other end of the second side section and the other end of the third side section;

the main section extends from the first side section to the fourth side section, and

the inner conductor section includes a first branch section that extends from the main section to the second side section and a second branch section that extends from the main section to the third side section.

8. The resonance coil according to claim 1, wherein

the resonance coil includes an outer conductor section that is formed with the coil wire that extends to surround the coil center line and that includes a first connecting end and a second connecting end, and an inner conductor section in which one end is connected to the first connecting end and the other end is connected to the second connecting end and that is arranged within a region that is surrounded by the outer conductor section, and formed with the coil wire,

in a first region that is surrounded by the outer conductor section, plural second regions that are surrounded by the inner conductor section and the outer conductor section, a third region that is surrounded by the first connecting section, the second connecting section, and the inner conductor section, and plural fourth regions that are regions other than the third region and that are surrounded by the inner conductor section are formed, and

the unit coil is formed with the inner conductor section and the outer conductor section that surround the second region, and the inner conductor section that surrounds the fourth region.

9. The resonance coil according to claim 8, wherein

an area that the plural second regions and the plural fourth regions occupy is larger than an area that the third region occupies.

10. The resonance coil according to claim 8, wherein

the inner conductor section includes a main section that extends from the outer conductor section toward the coil center line, a branch section that is formed to branch from the main section, and a projecting section that is formed to project from a midsection of the branch section in a length direction.

11. The resonance coil according to claim 2, wherein

the inner conductor section is plurally formed with a distance in an extending direction of the outer conductor section.

12. The resonance coil according to claim 1, wherein

the coil wire is positioned on an imaginary plane.

13. An electric power transmission device, comprising:

the resonance coil according to claim 1 for electric power transmission that is coupled to a resonance coil for electric power reception that is provided in an electric power receiving device through electromagnetic resonant coupling, and

a coil that is supplied with electric power from an external power supply and that supplies electric power to the resonance coil for electric power transmission through electromagnetic induction.

14. An electric power receiving device, comprising:

the resonance coil according to claim 1 for electric power reception that is coupled to a resonance coil for electric power transmission that is provided in an electric power transmission device through electromagnetic resonant coupling, and

a coil that receives electric power from the resonance coil for electric power reception through electromagnetic induction.

15. An electric power transmission system, comprising:

the electric power transmission device according to claim 13, and

an electric power receiving device comprising;

a resonance coil comprising

a coil wire that forms plural unit coils where directions of magnetic fields which are formed by flowing of electric current are the same,

wherein the plural unit coils are arranged around a coil center line, and when the resonance coil is seen in a direction of the coil center line, the coil wire is formed so as not to be overlapped, wherein

the electric power receiving device, further comprises;

the resonance coil for electric power reception that is coupled to a resonance coil for electric power transmission that is provided in an electric power transmission device through electromagnetic resonant coupling, and

a coil that receives electric power from the resonance coil for electric power reception through electromagnetic induction.