Wireless power supply system

Patent metadata

Field	Value
Publication number	US-9345177-B2
Application number	US-201414447852-A
Country	US
Kind code	B2
Filing date	Jul 31, 2014
Priority date	Feb 6, 2012
Publication date	May 17, 2016
Grant date	May 17, 2016

Abstract

A wireless power supply system that wirelessly supplies electric power from a power-supplying coil to a power-receiving coil is provided with a ground power-supplying device having a power-supplying coil, a vehicle having a power-receiving coil, and a power-supplying and a power-receiving covers that shield leakage magnetic flux by covering the periphery of the power-supplying coil and the power-receiving coil and the periphery of space between the coils.

First claim

The invention claimed is:

1. A wireless power supply system that wirelessly supplies electric power from a power-supplying coil to a power-receiving coil, the system comprising:
a power-supplying device having the power-supplying coil and a power-receiving device having the power-receiving coil,
an inflatable and expandable cover provided at least at one of the power-supplying device and the power-receiving device,
wherein when inflated, the expandable cover shields leakage magnetic flux by covering a periphery of the power-supplying coil and the power-receiving coil and a periphery of space between the coils.

2. The wireless power supply system according to claim 1 , wherein
the cover is sealed, and
the wireless power supply system further comprises a gas supply and exhaust mechanism that, when electric power is supplied, inflates the cover by supplying gas to inside of the cover and establishes a shielding state from outside the cover where the inflated cover covers the periphery of the power-supplying coil and the power-receiving coil and the periphery of the space between the coils, and that, when the electric power is not supplied, deflates the cover by exhausting gas from inside the cover and cancels the shielding state.

3. The wireless power supply system according to claim 1 ,
wherein a material is disposed at a portion of the cover located between the power-supplying coil and the power-receiving coil, the material having a higher magnetic permeability than other portions.

4. The wireless power supply system according to claim 1 ,
wherein the power-receiving device is a vehicle that charges received electric power to a battery and the vehicle is driven by electric power stored in the battery.

Assignees

• Ihi Corp

Inventors

• Maekawa Yuji

Classifications

• B60L53/37

  using optical position determination, e.g. using cameras · CPC title

• Y02T90/12

  Electric charging stations · CPC title

• B60L2270/147

  electro magnetic [EMI] · CPC title

• B60L53/38

  specially adapted for charging by inductive energy transfer · CPC title

• Y02T90/14

  Plug-in electric vehicles · CPC title