Vehicle and contactless power transfer system

• US 10,367,377 B2
• Filed: 01/27/2015
• Issued: 07/30/2019
• Est. Priority Date: 04/16/2014
• Status: Expired due to Fees

• Current Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Original Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Inventors: Yuasa, Hiroaki
• Primary Examiner(s): Barnie, Rexford N
• Assistant Examiner(s): Ly, Xuan
• Application Number:
  US15/301,170
• Publication Number:
  US 20170025902A1
• Time in Patent Office: 1,645 Days
• Field of Search: 307 91, 307 101, 307104
• CPC Class Codes: B60K 1/04 of the electric storage means for propulsion exchanging batteries for electric propulsion of vehicles B60L53/80; for auxiliary purposes only B60R16/04; supplying batteries to, or removing batteries from, vehicles B60S5/06
• CPC Class Codes: B60K 2001/0438 Arrangement under the floor
• CPC Class Codes: B60L 2270/147 electro magnetic [EMI]
• CPC Class Codes: B60L 53/122 Circuits or methods for driving the primary coil, e.g. supplying electric power to the coil
• CPC Class Codes: B60L 53/305 Communication interfaces
• 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: B60Y 2410/114 Shields, e.g. for heat protection
• 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 2310/48 for electric vehicles [EV] or hybrid vehicles [HEV]
• 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: H02J 50/80 involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices
• CPC Class Codes: H04B 5/266 One coil at each side, e.g. with primary and secondary coils
• CPC Class Codes: H04B 5/79 for data transfer in combination with power transfer
• 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
• CPC Class Codes: Y02T 90/16 : Information or communication technologies improving the operation of electric vehicles

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.

Claims

1. A contactless power transfer system comprising:

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,

said power reception coil being embedded within said resin member,

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; 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.

2. A contactless power transfer system comprising:

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,

said power reception coil being embedded within said resin member,

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; 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.

3. 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,

said power reception coil being embedded within said resin member;

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.

4. The contactless power transfer system according to claim 3, wherein said shield is provided with a notch having a shape corresponding to said flange, and said flange is located inside the notch.