Electricity: battery or capacitor charging or discharging – Battery or cell discharging – With charging
Reexamination Certificate
2005-09-06
2005-09-06
Tibbits, Pia (Department: 2838)
Electricity: battery or capacitor charging or discharging
Battery or cell discharging
With charging
C607S029000, C324S427000
Reexamination Certificate
active
06940255
ABSTRACT:
This document discusses, among other things, a system providing a battery charge indicator for an implantable medical device, such as using a lithium/carbon monofluoride (CFx) or other battery. Capacity vs. voltage data from a separate characterizing battery into a characterizing load impedance is stored in memory, such as in a lookup table or as a regression equation fitted to the data. For the actual battery of interest, then, a battery terminal voltage and a corresponding load current are measured, and a load impedance is calculated. A translation is performed to make the measured battery voltage and the characterizing capacity vs. voltage data comparable, so that a capacity reading can be obtained.
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Cardiac Pacemakers Inc.
Schwegman Lundberg Woessner & Kluth P.A.
Tibbits Pia
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