POWER RECEIVING DEVICE, VEHICLE, AND POWER TRANSMISSION DEVICE

• US 20150270717A1
• Filed: 03/13/2015
• Published: 09/24/2015
• Est. Priority Date: 03/24/2014
• Status: Active Grant

• Current Assignee: Kitagawa Industries Company Limited, Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Original Assignee: Kitagawa Industries Company Limited, Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Inventors: FUJIMAKI, Takashi, MORI, Akira, MATSUZAKI, Toru, ISHIHARA, Taichi
• Granted Patent: US 9,876,364 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: B60L 53/12 Inductive energy transfer
• CPC Class Codes: H01F 27/36 Electric or magnetic shields or screens movable for varying inductance H01F21/10
• CPC Class Codes: H01F 27/361 made of combinations of electrically conductive material and ferromagnetic 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 50/12 of the resonant type
• CPC Class Codes: H02J 50/70 involving the reduction of electric, magnetic or electromagnetic leakage fields
• 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

This power receiving device includes a magnetic shield, and the magnetic shield includes: a first magnetic sheet located beside the power receiving unit; a conductive sheet located opposite to the power receiving unit with the first magnetic sheet interposed therebetween; and a second magnetic sheet located opposite to the first magnetic sheet with the conductive sheet interposed therebetween.

Claims

1. A power receiving device comprising:

a power receiving unit for receiving power from a power transmission unit in a noncontact manner; and

a magnetic shield located opposite to said power transmission unit with said power receiving unit interposed therebetween, and having at least a part facing said power receiving unit, wherein

said magnetic shield includes;

a first magnetic sheet located beside said power receiving unit;

a conductive sheet located opposite to said power receiving unit with said first magnetic sheet interposed therebetween; and

a second magnetic sheet located opposite to said first magnetic sheet with said conductive sheet interposed therebetween.

2. The power receiving device according to claim 1, wherein

said second magnetic sheet is provided so as to have a thinner thickness than said first magnetic sheet.

3. The power receiving device according to claim 1, wherein

said power receiving unit includes a power receiving coil wound around a horizontal axis extending in a horizontal direction, and

said conductive sheet has:

a first conductive sheet disposed beside a first end along said horizontal axis of said power receiving unit; and

a second conductive sheet disposed beside a second end along said horizontal axis of said power receiving unit.

4. The power receiving device according to claim 3, wherein

said second magnetic sheet is provided so as to have a thinner thickness than said first magnetic sheet.

5. The power receiving device according to claim 1, wherein

said power receiving unit includes a power receiving coil wound around a vertical axis extending in a vertical direction, and

said conductive sheet is disposed so as to include a position where said axis passes.

6. A vehicle comprising:

a power receiving device; and

a vehicle body having a floor panel, wherein

said power receiving device includes;

a power receiving unit for receiving power from a power transmission unit in a noncontact manner; and

a magnetic shield located opposite to said power transmission unit with said power receiving unit interposed therebetween, and having at least a part facing said power receiving unit,

said magnetic shield includes;

a first magnetic sheet located beside said power receiving unit;

a conductive sheet located opposite to said power receiving unit with said first magnetic sheet interposed therebetween; and

a second magnetic sheet located opposite to said first magnetic sheet with said conductive sheet interposed therebetween, and

said magnetic shield is disposed between said power receiving unit and said floor panel.

7. A power transmission device comprising:

a power transmission unit for transmitting power to a power receiving unit in a noncontact manner; and

a magnetic shield located opposite to said power transmission unit with said power transmission unit interposed therebetween, and having at least a part facing said power transmission unit, wherein

said magnetic shield includes;

a first magnetic sheet located beside said power transmission unit;

a conductive sheet located opposite to said power transmission unit with said first magnetic sheet interposed therebetween; and

a second magnetic sheet located opposite to said first magnetic sheet with said conductive sheet interposed therebetween.

8. The power transmission device according to claim 7, wherein

said second magnetic sheet is provided so as to have a thinner thickness than said first magnetic sheet.

9. The power transmission device according to claim 7, wherein

said transmission unit includes a power transmission coil wound around a horizontal axis extending in a horizontal direction, and

said conductive sheet has:

a first conductive sheet disposed beside a first end along said horizontal axis of said power transmission unit; and

a second conductive sheet disposed beside a second end along said horizontal axis of said power transmission unit.

10. The power transmission device according to claim 9, wherein

said second magnetic sheet is provided so as to have a thinner thickness than said first magnetic sheet.

11. The power transmission device according to claim 7, wherein

said power transmission unit includes a power transmission coil wound around a vertical axis extending in a vertical direction, and

said conductive sheet is disposed so as to include a position where said axis passes.