초록 ▼

A staged energy storage system provides electrical energy to an implantable biomedical device by using the combination of a first stage energy source and a second stage energy concentration system. The second stage energy concentration system allows a lower density and/or lower voltage energy source

A staged energy storage system provides electrical energy to an implantable biomedical device by using the combination of a first stage energy source and a second stage energy concentration system. The second stage energy concentration system allows a lower density and/or lower voltage energy source to be used as the first stage energy source, thereby decreasing the battery cost, size and weight. In one embodiment, the second stage energy concentration system comprises a rechargeable battery. In another embodiment, the second stage energy capacitor system comprises a high energy density capacitor system. The staged energy storage system is ideal for internally charging a pulse-generating capacitor system within an implantable cardioverter defibrillator. In this embodiment, a high voltage transformer has a secondary side that is electrically connected to the pulse-generating capacitor system. A second stage concentration system is electrically connected between a first stage energy source and a primary side of the high voltage transformer to store at least a portion of an electrical charge that is delivered from the first stage energy source and to the high voltage transformer.

대표청구항 ▼

A staged energy storage system for providing low voltage energy to an implantable biomedical device comprising: a first stage energy source means for providing a long-term, low-voltage, low-current source of an electrical current of less than 10 milliamperes; a second stage energy concentration mean

A staged energy storage system for providing low voltage energy to an implantable biomedical device comprising: a first stage energy source means for providing a long-term, low-voltage, low-current source of an electrical current of less than 10 milliamperes; a second stage energy concentration means comprising a capacitor system for storing the electrical current delivered from the first stage energy source means; and switch means electrically connected to the second stage energy concentration means and to at least two implanted electrodes for selectively discharging the electrical current in the second stage energy concentration means through the at least two implanted electrodes as at least one short-term, low-voltage, high-current discharge of greater than 0.5 A, wherein the first stage energy source means is capable of delivering at least 1 joule/second and the second stage energy concentration means stores at least 15 J and wherein the first stage energy source means, the second stage energy concentration means and the switch means for selectively discharging are all contained within the implantable biomedical device.