WIRELESS POWER SUPPLY SYSTEM

• US 20160318408A1
• Filed: 07/13/2016
• Published: 11/03/2016
• Est. Priority Date: 01/21/2014
• Status: Active Grant

• Current Assignee: IHI Corporation
• Original Assignee: IHI Corporation
• Inventors: TOKURA, Susumu, HARA, Masakazu, FURIYA, Kentaro
• Granted Patent: US 10,320,243 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: B60L 2270/147 electro magnetic [EMI]
• CPC Class Codes: B60L 53/12 Inductive energy transfer
• CPC Class Codes: B60L 53/30 Constructional details of charging stations
• CPC Class Codes: B60M 7/003 for vehicles using stored power (e.g. charging stations)
• 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 3/322 the battery being on-board an electric or hybrid vehicle, e.g. vehicle to grid arrangements [V2G], power aggregation, use of the battery for network load balancing, coordinated or cooperative battery charging
• 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 50/90 involving detection or optimisation of position, e.g. alignment
• CPC Class Codes: H02J 7/0042 characterised by the mechanical construction
• 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

Provided is a wireless power-supplying system equipped with a power-supplying coil disposed on the ground side, and a power-receiving coil that is mounted on a movable body and wirelessly receives power supplied from the power-supplying coil. In addition, the wireless power-supplying system is provided with a recovery coil in the vicinity of a space between the power-supplying coil and the power-receiving coil such that a wound face thereof intersects leaka.ge flux occurring when the power is supplied from the power-supplying coil to the power-receiving coil.

Claims

1. A wireless power-supplying system comprising:

a power-supplying coil disposed on a ground side; and

a power-receiving coil mounted on a movable body and configured to wirelessly receive power supplied from the power-supplying coil,

wherein at least one recovery coil is provided in the vicinity of a space between the power-supplying coil and the power-receiving coil such that a wound face thereof intersects leakage flux occurring when the power is supplied from the power-supplying coil to the power-receiving coil.

2. The wireless power-supplying system according to claim 1, wherein a plurality of the recovery coils are provided in a height direction of the space.

3. The wireless power-supplying system according to claim 1, wherein a moving mechanism configured to move the recovery coil is provided to displace the recovery coil from a state in which the recovery coil lies above or on the ground or is retracted in the ground to a state in which the recovery coil stands up in the vicinity of the space.

4. The wireless power-supplying system according to claim 2, wherein a moving mechanism for moving the recovery coils is provided to displace the recovery coils from a state in which the recovery coils lie above or on the ground or are retracted in the ground to a state in which the recovery coils stand up in the vicinity of the space.

5. The wireless power-supplying system according to claim 3, wherein:

the moving mechanism includes a support configured to be extendable or contractible; and

the support has the plurality of recovery coils, is configured to increase or reduce an interval between the recovery coils by the extension or contraction of the support, and is configured to stop the extension of the support by touching a bottom portion of the movable body by a leading end of the support.

6. The wireless power-supplying system according to claim 4, wherein:

the moving mechanism includes a support configured to be extendable or contractible; and

the support has the plurality of recovery coils, is configured to increase or reduce an interval between the recovery coils by the extension or contraction of the support, and is configured to stop the extension of the support by touching a bottom portion of the movable body by a leading end of the support.