Rechargeable battery circuit and structure for compatibility with a planar inductive charging platform
First Claim
1. A battery pack for an electronic device comprising:
- battery cells, a battery charging circuit, an energy receiving element adapted to receive power from a planar inductive charging system, said energy receiving element having an inductance, a capacitor connected to said energy receiving element and forming a resonant tank therewith, and a diode rectifier and a DC capacitor connected to the energy receiving element to provide a rectified DC voltage that can be fed from the energy receiving element to said battery charging circuit.
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Accused Products
Abstract
A battery pack for an electronic device comprises battery cells, a battery charging circuit, and an energy receiving element adapted to receive power from a planar inductive charging system. The energy receiving element has an inductance and a capacitor is connected to the energy receiving element and forms a resonant tank therewith. A diode rectifier and a DC capacitor are connected to the energy receiving element to provide a rectified DC voltage that can be fed from the energy receiving element to said battery charging circuit. The energy receiving element may comprise a soft magnetic sheet with a coil wound around its edges, or a coil formed on a printed circuit board, or a combination of the two. The energy receiving element may be formed integrally with the battery pack, or may be provided as a separate component that can be added to an existing battery.
168 Citations
36 Claims
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1. A battery pack for an electronic device comprising:
- battery cells, a battery charging circuit, an energy receiving element adapted to receive power from a planar inductive charging system, said energy receiving element having an inductance, a capacitor connected to said energy receiving element and forming a resonant tank therewith, and a diode rectifier and a DC capacitor connected to the energy receiving element to provide a rectified DC voltage that can be fed from the energy receiving element to said battery charging circuit.
- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
- 11. An electronic device powered by a battery pack, said battery pack comprising battery cells and a battery charging circuit, said device comprising a housing, means for connecting said battery charging circuit to an external power adaptor, and said device further comprising an energy receiving element adapted to receive power from a planar inductive charging system and for supplying power to said battery charging circuit, said energy receiving element having an inductance, and an capacitor connected to said energy receiving element and forming a resonant tank therewith.
- 21. An energy receiving element adapted to be fixed to a battery pack to enable said battery pack to be charged from a planar inductive battery charging system, said energy receiving element having a capacitor, wherein said energy receiving element has an inductance and forms a resonant tank with an AC capacitor.
- 29. An energy receiving element adapted to be fixed to a battery pack to enable said battery pack to be charged from a planar inductive battery charging system, said energy receiving element comprising a generally planar thin soft magnetic sheet and a first coil wound around the edge of said sheet such that the coil lies in a plane defined by said magnetic sheet.
Specification