Vehicle with shielded power receiving coil

• US 10,202,045 B2
• Filed: 01/15/2013
• Issued: 02/12/2019
• Est. Priority Date: 01/16/2012
• Status: Active Grant

• Current Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Original Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Inventors: Ichikawa, Shinji, Nakamura, Toru, Ishida, Masaya, Hattori, Yoshiyuki, Watanabe, Toshiaki, Kojima, Takashi
• Primary Examiner(s): Dunn, Drew A
• Assistant Examiner(s): O'Neill-Becerril, Harry
• Application Number:
  US14/372,368
• Publication Number:
  US 20150008877A1
• Time in Patent Office: 2,219 Days
• Field of Search: 320108, 336 84 M, 336 84 R, 174391, 257659, 257660, 4286921, 428137, 2441591, 2441717, 244121, 315 85, 720650, 361220, 361816, 361818, 307 91
• CPC Class Codes: B60L 2270/147 electro magnetic [EMI]
• 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 27/2871 Pancake coils
• CPC Class Codes: H01F 27/288 Shielding
• 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: H02J 50/10 using inductive 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: 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 vehicle includes a power receiving portion that contactlessly receives electric power from a power transmitting portion provided outside the vehicle and includes a shield member that is arranged around the power receiving portion in the same plane as a plane in which the power receiving portion is arranged, wherein the shield member includes a first shield region having a high shielding function and a second shield region having a shielding function lower than that of the first shield region at a position around the power receiving portion.

Claims

1. A vehicle comprising:

a power receiving portion that contactlessly receives electric power from a power transmitting portion provided outside the vehicle; and

a shield member that is arranged around the power receiving portion in the same plane as a plane in which the power receiving portion is arranged, wherein the shield member includes a first shield region having a high shielding function and a second shield region having a shielding function lower than that of the first shield region which are located at a position that surrounds the power receiving portion, wherein

the vehicle has a vehicle long-side direction and a vehicle short-side direction perpendicular to the vehicle long-side direction in plan view in a state where the vehicle is stopped in a horizontal plane, and

the first shield region of the shield member is arranged in the vehicle short-side direction with respect to the power receiving portion and the second shield region of the shield member is arranged in the vehicle long-side direction with respect to the power receiving portion.

2. The vehicle according to claim 1, wherein

the shield member includes a center portion and a flange portion disposed around the center portion so as to integrally extend radially outward from the center portion,

the flange portion includes the first shield region and the second shield region, and

a radial length of the first shield region of the flange portion is larger than a radial length of the second shield region of the flange portion, as measured from a center point of the center portion.

3. The vehicle according to claim 1, wherein

the shield member includes a cylindrical portion and a flange portion integrally extended axially from the cylindrical portion,

the flange portion includes the first shield region and the second shield region, and

an axial length of the first shield region of the flange portion is larger than an axial length of the second shield region of the flange portion.

4. The vehicle according to claim 1, wherein

the shield member includes a cylindrical portion, and members having a shielding function are adhered to inner sides of the cylindrical portion at the first shield region.

5. The vehicle according to claim 1, wherein

the shield member is partitioned by boundary lines forming four quadrants and the first shield region and the second shield region are disposed in alternating ones of the four quadrants.

6. The vehicle according to claim 1, wherein

the vehicle includes a vehicle-mounted device, and the shield member is arranged such that the vehicle-mounted device faces the second shield region.

7. The vehicle according to claim 1, wherein

the power receiving portion is mounted on a lower side of an under body of the vehicle.

8. The vehicle according to claim 1, wherein

a difference between a natural frequency of the power transmitting portion and a natural frequency of the power receiving portion is smaller than or equal to 10% of the natural frequency of the power receiving portion.

9. The vehicle according to claim 1, wherein

a coupling coefficient between the power receiving portion and the power transmitting portion is smaller than or equal to 0.1.

10. The vehicle according to claim 1, wherein

the power receiving portion receives electric power from the power transmitting portion through at least one of a magnetic field that is formed between the power receiving portion and the power transmitting portion and that oscillates at a predetermined frequency and an electric field that is formed between the power receiving portion and the power transmitting portion and that oscillates at the predetermined frequency.

11. A vehicle comprising:

a power receiving portion that contactlessly receives electric power from a power transmitting portion provided outside the vehicle; and

a shield member that is arranged around the power receiving portion in the same plane as a plane in which the power receiving portion is arranged, wherein the shield member includes a first shield region having a high shielding function and a second shield region having a shielding function lower than that of the first shield region which are located at a position that surrounds the power receiving portion,

the shield member is arranged such that the first shield region includes a position having a minimum distance from the power receiving portion to an outer frame at a vehicle body outer side of a face on which the power receiving portion is installed.

12. The vehicle according to claim 11, wherein

the shield member includes a center portion and a flange portion disposed around the center portion so as to integrally extend radially outward from the center portion,

the flange portion includes the first shield region and the second shield region, and

a radial length of the first shield region of the flange portion is larger than a radial length of the second shield region of the flange portion, as measured from a center point of the center portion.

13. The vehicle according to claim 11, wherein

the shield member includes a cylindrical portion and a flange portion integrally extended axially from the cylindrical portion,

the flange portion includes the first shield region and the second shield region, and

an axial length of the first shield region of the flange portion is larger than an axial length of the second shield region of the flange portion.

14. The vehicle according to claim 11, wherein

the shield member includes a cylindrical portion, and members having a shielding function are adhered to inner sides of the cylindrical portion at the first shield region.

15. The vehicle according to claim 11, wherein

the shield member is partitioned by boundary lines forming four quadrants and the first shield region and the second shield region are disposed in alternating ones of the four quadrants.

16. The vehicle according to claim 11, wherein

the vehicle includes a vehicle-mounted device, and the shield member is arranged such that the vehicle-mounted device faces the second shield region.

17. The vehicle according to claim 11, wherein

the power receiving portion is mounted on a lower side of an under body of the vehicle.

18. The vehicle according to claim 11, wherein

a difference between a natural frequency of the power transmitting portion and a natural frequency of the power receiving portion is smaller than or equal to 10% of the natural frequency of the power receiving portion.

19. The vehicle according to claim 11, wherein

a coupling coefficient between the power receiving portion and the power transmitting portion is smaller than or equal to 0.1.

20. The vehicle according to claim 11, wherein

the power receiving portion receives electric power from the power transmitting portion through at least one of a magnetic field that is formed between the power receiving portion and the power transmitting portion and that oscillates at a predetermined frequency and an electric field that is formed between the power receiving portion and the power transmitting portion and that oscillates at the predetermined frequency.

21. The vehicle according to claim 16, wherein

the vehicle-mounted device is a muffler.

22. The vehicle according to claim 16, wherein

the vehicle-mounted device is a suspension.