SHIELD AND VEHICLE INCORPORATING THE SHIELD

• US 20120242447A1
• Filed: 12/17/2009
• Published: 09/27/2012
• Est. Priority Date: 12/17/2009
• Status: Active Grant

• Current Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Original Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Inventors: Ichikawa, Shinji
• Granted Patent: US 9,126,491 B2
• Time in Patent Office: Days
• US Class Current: 336/84.C
• CPC Class Codes: B60L 2210/40 DC to AC converters
• CPC Class Codes: B60L 2270/147 electro magnetic [EMI]
• CPC Class Codes: B60L 53/12 Inductive energy transfer
• CPC Class Codes: B60L 53/36 by positioning the vehicle
• CPC Class Codes: B60L 53/38 specially adapted for charging by inductive energy transfer
• 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: H05K 9/0075 Magnetic shielding materials
• 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 shield for a coil unit to carry out non-contact power feeding by a resonance method includes a magnetic sheet capable of reducing a magnetic field, and a copper shield capable of reducing both an electric field and magnetic field. The magnetic sheet is arranged to take a layered configuration at a side closer to the coil unit than the copper shield.

Claims

1. A shield for a coil employed in non-contact power transmission to carry out at least one of transmission and reception of electric power by an electromagnetic field through electromagnetic resonance, said shield comprising:

a first shield member capable of reducing a magnetic field, and

a second shield member capable of reducing both an electric field and magnetic field more, but with greater loss, than said first shield member,

said first shield member arranged closer to said coil than said second shield member.

2. The shield according to claim 1, wherein said first shield member is configured including a magnetic material.

3. The shield according to claim 1, wherein said second shield member is a conductor containing copper.

4. The shield according to claim 1, wherein said shield is formed taking a vessel shape allowing said coil to be stored inside, and having one direction not blocked.

5. The shield according to claim 1, wherein said first shield member and said second shield member are arranged to form contact with each other.

6. A vehicle capable of receiving electric power in a non-contact manner by an electromagnetic field through electromagnetic resonance with a power transmission device, said vehicle comprising:

a coil for receiving electric power from said power transmission device, and

a shield provided around said coil, and capable of blocking said electromagnetic field, said shield including

a first shield member capable of reducing a magnetic field, and

a second shield member capable of reducing both electric field and magnetic field more, but with greater loss, than said first shield member,

said first shield member arranged closer to said coil than said second shield member.