POWER RECEPTION DEVICE, POWER TRANSMISSION DEVICE, AND POWER TRANSFER SYSTEM

• US 20140354068A1
• Filed: 09/28/2011
• Published: 12/04/2014
• Est. Priority Date: 09/28/2011
• Status: Active Grant

• Current Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Original Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Inventors: Horiuchi, Satoru
• Granted Patent: US 9,711,282 B2
• Time in Patent Office: Days
• US Class Current: 307/104
• 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 2270/145 Structure borne vibrations
• 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: B60L 53/20 characterised by converters located in the vehicle
• CPC Class Codes: B60L 53/36 by positioning the vehicle
• CPC Class Codes: H01F 2038/146 in combination with capacitive coupling
• CPC Class Codes: H01F 27/363 made of electrically conductive material
• CPC Class Codes: H01F 38/14 Inductive couplings for wireless supply or distribution of electric power using inductive coupling H02J50/10
• CPC Class Codes: H01G 2/02 Mountings
• CPC Class Codes: H02J 2310/48 for electric vehicles [EV] or hybrid vehicles [HEV]
• CPC Class Codes: H02J 50/05 using capacitive coupling
• CPC Class Codes: H02J 50/12 of the resonant type
• CPC Class Codes: H02J 50/70 involving the reduction of electric, magnetic or electromagnetic leakage fields
• CPC Class Codes: H05K 5/03 Covers
• CPC Class Codes: H05K 9/0007 Casings standardised racks H05K9/0062
• 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 power reception device includes a power reception unit having a first capacitor, receiving electric power in a non-contact manner from an externally provided power transmission unit, a first housing case housing the power reception unit inside, and a first anchor member anchoring the first capacitor. The first housing case includes a first shield defining a region where an electromagnetic field developed around the power reception unit is emitted. The first capacitor is anchored by the first anchor member at a position spaced apart from the first shield.

Claims

1. A power reception device comprising:

a power reception unit including a first capacitor, and receiving electric power in a non-contact manner from an externally provided power transmission unit,

a first housing case housing said power reception unit inside, and

a first anchor member anchoring said first capacitor,

said first housing case including a first shield defining a region where an electromagnetic field developed around said power reception unit is emitted,

said first capacitor being anchored by said first anchor member at a position spaced apart from said first shield.

2. The power reception device according to claim 1, wherein said first shield includes:

a top plate; and

a first peripheral wall formed suspending from said top plate,

said first shield has a first opening formed, opposite to said top plate,

said first housing case includes an insulative first lid closing said first opening,

said first capacitor is secured to said first lid.

3. The power reception device according to claim 1, wherein said first capacitor includes:

a first electrode; and

a second electrode arranged opposite to said first electrode with a distance therebetween,

a distance between said first capacitor and said first shield is greater than a distance between said first electrode and said second electrode.

4. The power reception device according to claim 1, wherein said power reception unit includes:

a first wiring connected to said first capacitor; and

a first coil connected to said first capacitor by said first wiring,

a distance between said first shield and said first capacitor is greater than a distance between said first coil and said first capacitor.

5. The power reception device according to claim 1, further comprising a first device arranged inside said first housing case, and provided spaced apart from said first capacitor,

wherein a distance between said first shield and said first capacitor is greater than a distance between said first device and said first capacitor.

6. The power reception device according to claim 1, wherein said first capacitor includes:

a first electrode; and

a second electrode arranged opposite to said first electrode with a distance therebetween,

said first anchor member includes a first contact face in contact with said first capacitor, and

a region of said first contact face, located between said first electrode and said second electrode, has a trench formed.

7. The power reception device according to claim 1, wherein said first shield includes:

a top plate; and

a first peripheral wall formed suspending from said top plate,

said first shield has a first opening formed, opposite to said top plate,

said first housing case includes;

an insulative first lid closing said first opening; and

a first support provided at said first lid, supporting said first capacitor,

said first capacitor includes;

a first electrode; and

a second electrode arranged opposite to said first electrode with a distance therebetween,

a region of an inner circumferential face of said first support, located between said first electrode and said second electrode, has a trench formed.

8. The power reception device according to claim 1, wherein said first capacitor includes:

a first electrode; and

a second electrode arranged opposite to said first electrode with a distance therebetween,

said first anchor member includes a first holder formed so as to cover a circumferential face of said first capacitor,

a region of an inner circumferential face of said first holder, located between said first electrode and said second electrode, has a trench formed.

9. The power reception device according to claim 1, wherein said first capacitor includes:

a first electrode; and

a second electrode arranged opposite to said first electrode with a distance therebetween,

said first anchor member includes a second holder formed so as to cover an inner circumferential face of said first capacitor,

a region of an inner circumferential face of said second holder, located between said first electrode and said second electrode, has a hole formed.

10. The power reception device according to claim 1, wherein a difference between a natural frequency of said power transmission unit and a natural frequency of said power reception unit is less than or equal to 10% the natural frequency of said power reception unit.

11. The power reception device according to claim 1, wherein a coupling coefficient between said power reception unit and said power transmission unit is less than or equal to 0.1.

12. The power reception device according to claim 1, wherein said power reception unit receives electric power from said power transmission unit through at least one of a magnetic field developed between said power reception unit and said power transmission unit, and oscillating at a particular frequency, and an electric field developed between said power reception unit and said power transmission unit, and oscillating at a particular frequency.

13. A power transmission device comprising:

a power transmission unit including a second capacitor, and transmitting electric power in a non-contact manner to an externally provided power reception unit,

a second housing case housing said power transmission unit inside, and

a second anchor member anchoring said second capacitor,

said second housing case including a second shield defining a region where an electromagnetic field developed around said power transmission unit is emitted,

said second capacitor being anchored by said second anchor member at a position spaced apart from said second shield.

14. The power transmission device according to claim 13, wherein

said second shield includes:

a bottom plate; and

a second peripheral wall formed so as to erect from said bottom plate,

said second shield has a second opening formed, opposite to said bottom plate,

said second housing case includes an insulative second lid closing said second opening,

said second capacitor is secured to said second lid.

15. The power transmission device according to claim 13, wherein

said second capacitor includes:

a third electrode; and

a fourth electrode arranged opposite to said third electrode with a distance therebetween,

a distance between said second capacitor and said second shield is greater than a distance between said third electrode and said fourth electrode.

16. The power transmission device according to claim 13, wherein

said power transmission unit includes:

a second wiring connected to said second capacitor; and

a second coil connected to said second capacitor by said second wiring,

a distance between said second shield and said second capacitor is greater than a distance between said second coil and said second capacitor.

17. The power transmission device according to claim 13, further comprising a second device arranged in said second housing case and provided spaced apart from said second capacitor,

wherein a distance between said second shield and said second capacitor is greater than a distance between said second device and said second capacitor.

18. The power transmission device according to claim 13, wherein

said second capacitor includes:

a third electrode; and

a fourth electrode arranged opposite to said third electrode with a distance therebetween,

said second anchor member includes a second contact face in contact with said second capacitor,

a region of said second contact face, located between said third electrode and said fourth electrode, has a trench formed.

19. The power transmission device according to claim 13, wherein

said second shield includes:

a bottom plate; and

a second peripheral wall formed so as to erect from said bottom plate, said second shield has a second opening formed, opposite to said bottom plate, said second housing case includes;

an insulative second lid closing said second opening; and

a second support provided at said second lid, and supporting said second capacitor,

said second capacitor includes;

a third electrode; and

a fourth electrode arranged opposite to said third electrode with a distance therebetween,

a region of an inner circumferential face of said second support, located between said third electrode and said fourth electrode, has a trench formed.

20. The power transmission device according to claim 13, wherein

said second capacitor includes:

a third electrode; and

a fourth electrode arranged opposite to said third electrode with a distance therebetween,

said second anchor member includes a third holder formed so as to cover a circumferential face of second capacitor,

a region of an inner circumferential face of said third holder, located between said third electrode and said fourth electrode, has a trench formed.

21. The power transmission device according to claim 13, wherein

said second capacitor includes:

a third electrode; and

a fourth electrode arranged opposite to said third electrode with a distance therebetween,

said second anchor member includes a fourth holder formed so as to cover a circumferential face of said second capacitor,

a region of an inner circumferential face of said fourth holder, located between said third electrode and said fourth electrode, has a hole formed.

22. The power transmission device according to claim 13, wherein a difference between a natural frequency of said power transmission unit and a natural frequency of said power reception unit is less than or equal to 10% the natural frequency of said power reception unit.

23. The power transmission device according to claim 13, wherein a coupling coefficient between said power transmission unit and said power reception unit is less than or equal to 0.1.

24. The power transmission device according to claim 13, wherein said power transmission unit transmits electric power to said power reception unit through at least one of a magnetic field developed between said power reception unit and said power transmission unit, and oscillating at a particular frequency, and an electric field developed between said power reception unit and said power transmission unit, and oscillating at a particular frequency.

25. A power transfer system comprising:

a power transmission device including a power transmission unit; and

a power reception device,

said power reception device including;

a power reception unit receiving electric power from said power transmission unit in a non-contact manner, and including a first capacitor;

a first housing case housing said power reception unit inside; and

a first anchor member anchoring said first capacitor,

said first housing case including a first shield defining a region where an electromagnetic field developed around said power reception unit is emitted,

said first capacitor being anchored by said first anchor member at a position spaced apart from said first shield.

26. A power transfer system comprising:

a power reception device including a power reception unit; and

a power transmission device,

said power transmission device including;

a power transmission unit transmitting electric power in a non-contact manner to said power reception unit, and including a second capacitor;

a second housing case housing said power transmission unit inside; and

a second anchor member anchoring said second capacitor,

said second housing case including a second shield defining a region where an electromagnetic field developed around said power transmission unit is emitted,

said second capacitor being anchored by said second anchor member at a position spaced apart from said second shield.