Power reception device and power transmission device

Patent metadata

Field	Value
Publication number	US-9787138-B2
Application number	US-201214398811-A
Country	US
Kind code	B2
Filing date	Jun 4, 2012
Priority date	Jun 4, 2012
Publication date	Oct 10, 2017
Grant date	Oct 10, 2017

Abstract

A power reception device includes a first case having an accommodation portion formed therein, a core disposed in the first case, a second coil disposed in the first case and provided on the core, a first electrical device disposed in the first case and connected to the second coil, a first insulation member disposed between an inner surface of the first case and the second coil, and between the inner surface of the first case and the first electrical device, and a cooling device that causes a flow of a coolant to cool the second coil and the first electrical device, the second coil and the first electrical device being attached to the inner surface of the first case with the first insulation member interposed therebetween, the first electrical device being disposed upstream in a flow direction of the coolant from the second coil.

First claim

The invention claimed is:

1. A power reception device that receives electric power in a non-contact manner from a power transmission unit including a first coil, comprising:
a case having an accommodation portion formed therein;
a core disposed in said case;
a second coil disposed in said case and provided on said core;
an electrical device disposed in said case and connected to said second coil;
an insulation member disposed between an inner surface of said case and said second coil, and between the inner surface of said case and said electrical device; and
a cooling device that causes a flow of a coolant to cool said second coil and said electrical device,
said second coil and said electrical device being attached to the inner surface of said case with said insulation member interposed therebetween,
said electrical device being disposed upstream in a flow direction of said coolant from said second coil, wherein
said electrical device includes a capacitor connected to said second coil, and a rectifier that rectifies a current received by said second coil,
said rectifier is disposed upstream in the flow direction of said coolant from said capacitor, and
said capacitor is disposed upstream in the flow direction of said coolant from said second coil.

2. The power reception device according to claim 1 , wherein
said cooling device supplies the coolant into said case.

3. The power reception device according to claim 2 , wherein
said second coil is formed to surround a first winding axis, and
said cooling device supplies said coolant in a first intersecting direction that intersects a direction in which said first winding axis extends.

4. The power reception device according to claim 1 , wherein
said case is sealed.

5. The power reception device according to claim 1 , wherein
said second coil and a capacitor connected to said second coil form a power reception unit that receives electric power in a non-contact manner from said power transmission unit, and
a difference between a natural frequency of said power transmission unit and a natural frequency of said power reception unit is 10% or less of the natural frequency of said power reception unit.

6. The power reception device according to claim 1 , wherein
said second coil and a capacitor connected to said second coil form a power reception unit that receives electric power in a non-contact manner from said power transmission unit, and
a coupling coefficient between said power reception unit and said power transmission unit is 0.1 or less.

7. The power reception device according to claim 1 , wherein
said second coil and a capacitor connected to said second coil form a power reception unit that receives electric power in a non-contact manner from said power transmission unit, and
said power reception unit receives electric power from said power transmission unit through at least one of a magnetic field and an electric field, said magnetic field being formed between said power reception unit and said power transmission unit and oscillating at a specific frequency, said electric field being formed between said power reception unit and said power transmission unit and oscillating at the specific frequency.

8. A power reception device that receives electric power in a non-contact manner from a power transmission unit including a first coil, comprising:
a case having an accommodation portion formed therein;
a core disposed in said case;
a second coil disposed in said case and provided on said core,
an electrical device disposed in said case and connected to said second coil;
an insulation member disposed between an inner surface of said case and said second coil, and between the inner surface of said case and said electrical device; and
a cooling device that causes a flow of a coolant to cool said second coil and said electrical device,
said second coil and said electrical device being attached to the inner surface of said case with said insulation member interposed therebetween,
said electrical device being disposed upstream in a flow direction of said coolant from said second coil, wherein
said electrical device includes a capacitor connected to said second coil, and a rectifier that rectifies a current received by said second coil,
said capacitor is disposed upstream in the flow direction of said coolant from said rectifier, and
said rectifier is disposed upstream in the flow direction of said coolant from said second coil.

9. A power reception device that receives electric power in a non-contact manner from a power transmission unit including a first coil, comprising:
a case having an accommodation portion formed therein;
a core disposed in said case;
a second coil disposed in said case and provided on said core;
an electrical device disposed in said case and connected to said second coil;
an insulation member disposed between an inner surface of said case and said second coil, and between the inner surface of said case and said electrical device; and
a cooling device that causes a flow of a coolant to cool said second coil and said electrical device,
said second coil and said electrical device being attached to the inner surface of said case with said insulation member interposed therebetween,
said electrical device being disposed upstream in a flow direction of said coolant from said second coil, wherein
said second coil is formed to surround a first winding axis,
said core includes a first stem portion having said second coil wound therearound, a first magnetic pole portion formed at a first end portion of said first stem portion and extending in a first intersecting direction that intersects a direction in which said first winding axis extends, and a second magnetic pole portion formed at a second end portion of said first stem portion and extending in said first intersecting direction,
a width of said first stem portion in said first intersecting direction is smaller than a length of said first magnetic pole portion and a length of said second magnetic pole portion in said first intersecting direction,
a first central portion positioned at a center of said first magnetic pole portion in said first intersecting direction and a second central portion positioned at a center of said second magnetic pole portion in said first intersecting direction are displaced in said first intersecting direction from a third central portion positioned at a center of said first stem portion in said first intersecting direction, and
said electrical device is disposed so as to be displaced from said first stem portion in said first intersecting direction, and is disposed between said first magnetic pole portion and said second magnetic pole portion.

10. A power transmission device that transmits electric power in a non-contact manner to a power reception unit including a second coil, comprising:
a case having an accommodation portion;
a core disposed in said case;
a first coil disposed in said case and provided on said core;
a second electrical device disposed in said case and connected to said first coil;
an insulation member disposed between an inner surface of said case and said first coil, and between the inner surface of said case and said second electrical device; and
a cooling device that causes a flow of a coolant to cool said first coil and said second electrical device,
said first coil and said second electrical device being attached to the inner surface of said case with said insulation member interposed therebetween,
said second electrical device being disposed upstream in a flow direction of said coolant from said first coil, wherein
said first coil is formed to surround a second winding axis,
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Assignees

• Ichikawa Shinji
• Toyota Motor Co Ltd

Inventors

• Ichikawa Shinji

Classifications

• B60L53/124

  Detection or removal of foreign bodies · CPC title

• B60L53/126

  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 title

• H02J2105/37

  exchanging power with electric vehicles [EV] or with hybrid electric vehicles [HEV] · CPC title

• H02J7/70

  characterised by the mechanical construction · CPC title

• H01F38/14

  Inductive couplings {(for wireless supply or distribution of electric power using inductive coupling H02J50/10)} · CPC title