Vehicle and contactless power transfer system

Patent metadata

Field	Value
Publication number	US-2017025902-A1
Application number	US-201515301170-A
Country	US
Kind code	A1
Filing date	Jan 27, 2015
Priority date	Apr 16, 2014
Publication date	Jan 26, 2017
Grant date	—

Abstract

Provided is a vehicle including a floor panel, a power reception device including a secondary side core and a power reception coil wound around the secondary side core, and being attached to a lower surface of the floor panel to receive electric power from a power transmission device in a contactless manner while being opposed to the power transmission device, and a shield provided to cover at least a portion of the floor panel positioned around the secondary side core.

First claim

1 . A vehicle comprising:
a floor panel; a power reception device including a secondary side core and a power reception coil wound around said secondary side core, and being attached to a lower surface of said floor panel to receive electric power from a power transmission device in a contactless manner while being opposed to said power transmission device; and a shield provided to cover at least a portion of said floor panel positioned around said secondary side core, said power reception device including a resin member sealing therein said secondary side core and said power reception coil, a flange being provided around said resin member, and said power reception device being attached to said lower surface of said floor panel via said flange.

2 . The vehicle according to claim 1 , wherein
said power reception coil is disposed to have a coil winding axis extending in a vehicle longitudinal direction, said floor panel includes a central tunnel extending in the vehicle longitudinal direction, said power reception device is disposed to straddle said central tunnel, and said shield includes a first shielding part disposed such that its position in a vehicle width direction is located on the left side in the vehicle width direction with respect to said power reception device and a second shielding part disposed such that its position in the vehicle width direction is located on the right side in the vehicle width direction with respect to said power reception device.

3 . The vehicle according to claim 1 , wherein a lower surface of said shield in the vertical direction is positioned above an upper surface of said secondary side core in the vertical direction.

4 . A contactless power transfer system comprising:
the vehicle as defined in claim 1 ; and a power transmission device including a primary side core and a power transmission coil wound around said primary side core, one of said vehicle and said power transmission device further including a control unit configured to calculate a parameter relevant to power receiving efficiency of said power reception device, in the vehicle width direction, a width dimension of said primary side core being larger than the width dimension of said secondary side core, said shield including a first protruding part protruding to the left side in the vehicle width direction with respect to said secondary side core and a second protruding part protruding to the right side in the vehicle width direction with respect to said secondary side core, an amount of protrusion of said first protruding part to the left side in the vehicle width direction with respect to said secondary side core and an amount of protrusion of said second protruding part to the right side in the vehicle width direction with respect to said secondary side core each being larger than the width dimension of said secondary side core in the vehicle width direction and smaller than the width dimension of said primary side core, when said parameter as calculated is smaller than a predetermined threshold, said control unit stopping power transmission from said power transmission device to said power reception device.

5 . A contactless power transfer system comprising:
the vehicle as defined in claim 1 ; and a power transmission device including a primary side core and a power transmission coil wound around said primary side core, one of said vehicle and said power transmission device further including a control unit configured to calculate a parameter relevant to power receiving efficiency of said power reception device, in the vehicle width direction, a width dimension of said primary side core being larger than the width dimension of said secondary side core, said shield including a third protruding part protruding to the front side in the vehicle longitudinal direction with respect to said secondary side core and a fourth protruding part protruding to the back side in the vehicle longitudinal direction with respect to said secondary side core, an amount of protrusion of said third protruding part to the front side in the vehicle longitudinal direction with respect to said secondary side core and an amount of protrusion of said fourth protruding part to the back side in the vehicle longitudinal direction with respect to said secondary side core each being larger than a length dimension of said secondary side core in the vehicle longitudinal direction and smaller than the length dimension of said primary side core, when said parameter as calculated is smaller than a predetermined threshold, said control unit stopping power transmission from said power transmission device to said power reception device.

6 . A contactless power transfer system comprising a vehicle and a power transmission device,
said vehicle including a floor panel, a power reception device including a secondary side core and a power reception coil wound around said secondary side core, and being attached to a lower surface of said floor panel to receive electric power from said power transmission device in a contactless manner while being opposed to said power transmission device, and a shield provided to cover a portion of said floor panel positioned around said secondary side core, said power transmission device including a primary side core and a power transmission coil wound around said primary side core, in a vehicle width direction, a width dimension of said primary side core being larger than the width dimension of said secondary side core, in the vehicle width direction, the distance between a portion of said shield positioned on the leftmost side in the vehicle width direction and a portion of said shield positioned on the rightmost side in the vehicle width direction being larger than the width dimension of said primary side core, said power reception device including a resin member sealing therein said secondary side core and said power reception coil, a flange being provided around said resin member, and said power reception device being attached to said lower surface of said floor panel via said flange.

Assignees

• Toyota Motor Co Ltd

Inventors

• Yuasa Hiroaki

Classifications

• Y02T10/7072

  Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors · CPC title

• B60L53/38

  specially adapted for charging by inductive energy transfer · CPC title

• B60L53/305

  Communication interfaces · CPC title

• H02J50/80

  involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices · CPC title

• B60L2270/147

  electro magnetic [EMI] · CPC title