System and method for contactless power transfer in implantable devices
First Claim
1. A system for contactless power transfer comprising:
- a first coil adapted to be electrically coupled to a power source, wherein the first coil is configured to produce a magnetic field;
a second coil adapted to be electrically coupled to a rechargeable battery disposed within an implantable device, wherein the second coil is configured to receive power from the first coil via the magnetic field and to transfer the power to the rechargeable battery; and
a field focusing element disposed between the first coil and the second coil and configured as a self resonant coil having a standing wave current distribution to focus the magnetic field onto the second coil and enhance the coupling between the first coil and the second coil, wherein the field focusing element comprises a plurality of resonators configured to operate at different resonant frequencies and simultaneously focus the magnetic field at different resonant frequencies.
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Accused Products
Abstract
A system and method for contactless power transfer in implantable devices for charging rechargeable batteries disposed within the implantable devices are provided. The system includes a first coil electrically couplable to a power source, wherein the first coil is configured to produce a magnetic field. The system further includes a second coil electrically coupled to the rechargeable battery disposed within the implantable device and configured to receive power from the first coil via the magnetic field and to transfer the power to the rechargeable battery. The system also includes a field focusing element disposed between the first coil and the second coil and configured as a self resonant coil having a standing wave current distribution to focus the magnetic field onto the second coil and enhance the coupling between the first coil and the second coil.
13 Citations
17 Claims
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1. A system for contactless power transfer comprising:
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a first coil adapted to be electrically coupled to a power source, wherein the first coil is configured to produce a magnetic field; a second coil adapted to be electrically coupled to a rechargeable battery disposed within an implantable device, wherein the second coil is configured to receive power from the first coil via the magnetic field and to transfer the power to the rechargeable battery; and a field focusing element disposed between the first coil and the second coil and configured as a self resonant coil having a standing wave current distribution to focus the magnetic field onto the second coil and enhance the coupling between the first coil and the second coil, wherein the field focusing element comprises a plurality of resonators configured to operate at different resonant frequencies and simultaneously focus the magnetic field at different resonant frequencies. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method for contactless charging of a rechargeable battery disposed in an implantable device comprising:
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generating a magnetic field via a first coil coupled to a power source; simultaneously focusing the magnetic field at different resonant frequencies to a second coil via a field focusing element , wherein the field focusing element comprises a plurality of resonators with at least two of the plurality of resonators configured to operate at different resonant frequencies and simultaneously focus the magnetic field at the different resonant frequencies; transferring power from the first coil to the second coil via the magnetic field; and transmitting the power from the second coil to the rechargeable battery disposed within the implantable device. - View Dependent Claims (12, 13, 14, 15, 16, 17)
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Specification