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US 7,952,324 B2Granted
Contact-less power transfer
AssigneeAccess Business Group International LLC
InventorsLily Ka-Lai Cheng, James Westwood Hay, Pilgrim Giles William Beart
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AssigneeAccess Business Group International LLC
InventorsLily Ka-Lai Cheng, James Westwood Hay, Pilgrim Giles William Beart
Estimating the term…
There is disclosed a system and method for transferring power without requiring direct electrical conductive contacts. There is provided a primary unit having a power supply and a substantially laminar charging surface having at least one conductor that generates an electromagnetic field when a current flows therethrough and having an charging area defined within a perimeter of the surface, the at least one conductor being arranged such that electromagnetic field lines generated by the at least one conductor are substantially parallel to the plane of the surface or at least subtend an angle of 45° or less to the surface within the charging area; and at least one secondary device including at least one conductor that may be wound about a core. Because the electromagnetic field is spread over the charging area and is generally parallel or near-parallel thereto, coupling with flat secondary devices such as mobile telephones and the like is significantly improved in various orientations thereof.
A portable electrical or electronic device, adapted to receive power inductively from an external unit that has a field generating surface and a field generator which generates an electromagnetic field at or over the field generating surface, the device being adapted to receive power from the external unit when placed in an intended power-receiving disposition on or in proximity to said field generating surface and being separable from the external unit when not receiving power therefrom, the device comprising:
A rechargeable battery adapted to receive power inductively from a primary unit when fitted into a space in a portable electrical or electronic device, the device comprising a cover element having a substantially planar portion with inner and outer surfaces and being adapted to be placed with said outer surface on or in proximity to such a primary unit when the battery is to be recharged, and the device being adapted to retain the battery in the space with its longitudinal axis extending generally parallel to a plane of said planar portion, the battery comprising:
A rechargeable battery adapted to receive power inductively from a primary unit when fitted into a space in a portable electrical or electronic device, the device comprising a cover element having a substantially planar portion with inner and outer surfaces and being adapted to be placed with said outer surface on or in proximity to such a primary unit when the battery is to be recharged, and the device being adapted to retain the battery in the space with its longitudinal axis extending generally parallel to a plane of said planar portion, the battery comprising:
A rechargeable battery adapted to receive power inductively from a primary unit, the battery comprising:
Dependencies are inferred from the claim text.