POWER RECEIVING DEVICE AND POWER TRANSMITTING DEVICE

• US 20160250934A1
• Filed: 11/18/2014
• Published: 09/01/2016
• Est. Priority Date: 11/18/2013
• Status: Active Grant

• Current Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Original Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Inventors: YUASA, Hiroaki
• Granted Patent: US 9,884,563 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: B60L 5/00 Current collectors for power supply lines of electrically-propelled vehicles current collectors in general H01R41/00
• 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 27/363 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 50/12 of the resonant type
• 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 power receiving unit adopted for this power receiving device includes a core unit having a plate-like shape and including a side surface, an upper surface and a lower surface, and a power receiving coil helically wound about a coil winding axis to surround the core unit including the upper and lower surfaces, the shield including a first shield disposed on the side of one end of the power receiving unit in an axial direction of the coil winding axis, and a second shield disposed on the side of the other end of the power receiving unit in the axial direction of the coil winding axis, the shield being absent at least at a location directly above a center portion of the power receiving unit.

Claims

1. A power receiving device comprising:

a power receiving unit receiving electric power contactlessly from a power transmitting unit having a power transmitting coil, in a state in which the power receiving unit faces the power transmitting unit; and

a shield provided at a side opposite to a side at which at least the power transmitting unit is located, with the power receiving unit posed therebetween,

the power receiving unit including a core unit having a plate-like shape and including a side surface, an upper surface and a lower surface, and a power receiving coil helically wound about a coil winding axis to surround the core unit including the upper and lower surfaces,

the shield including a first shield disposed on a side of one end of the power receiving unit in an axial direction of the coil winding axis, and a second shield disposed on a side of an other end of the power receiving unit in the axial direction of the coil winding axis,

the shield being absent at least at a location directly above a center portion of the power receiving unit.

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

the first shield and the second shield are separated in rectangles, respectively;

the first shield is disposed on the side of one end of the power receiving unit in the axial direction of the coil winding axis; and

the second shield is disposed on the side of the other end of the power receiving unit in the axial direction of the coil winding axis.

3. The power receiving device according to claim 1, wherein the first shield and the second shield are coupled by a coupling shield disposed at a location directly above opposite end sides of the power receiving unit to thus have a looped shape.

4. A power transmitting device comprising:

a power transmitting unit transmitting electric power contactlessly to a power receiving unit having a power receiving coil, in a state in which the power transmitting unit faces the power receiving unit; and

a shield provided at a side opposite to a side at which at least the power receiving unit is located, with the power transmitting unit posed therebetween,

the power transmitting unit including a core unit having a plate-like shape and including a side surface, an upper surface and a lower surface, and a power transmitting coil helically wound about a coil winding axis to surround the core unit including the upper and lower surfaces,

the shield including a first shield disposed on a side of one end of the power transmitting unit in an axial direction of the coil winding axis, and a second shield disposed on a side of an other end of the power transmitting unit in the axial direction of the coil winding axis,

the shield being absent at least at a location directly above a center portion of the power transmitting unit.

5. The power transmitting device according to claim 4, wherein:

the first shield and the second shield are separated in rectangles, respectively;

the first shield is disposed on the side of one end of the power transmitting unit in the axial direction of the coil winding axis; and

the second shield is disposed on the side of the other end of the power transmitting unit in the axial direction of the coil winding axis.

6. The power transmitting device according to claim 5, wherein the first shield and the second shield are coupled by a coupling shield disposed at a location directly above opposite end sides of the power transmitting unit to thus have a looped shape.