Electricity: measuring and testing – Electrolyte properties – Using a battery testing device
Reexamination Certificate
2007-07-03
2007-07-03
Tibbits, Pia (Department: 2838)
Electricity: measuring and testing
Electrolyte properties
Using a battery testing device
C607S029000
Reexamination Certificate
active
10618095
ABSTRACT:
A manganese dioxide (MnO2) or silver vanadium oxide (SVO) or other battery of an implantable medical device having a relatively flat quiescent battery voltage during a beginning portion of the battery's useful life, makes it difficult to use quiescent battery voltage as an indicator of remaining battery energy during this portion of the battery life. A substantially constant load current pulse is drawn from the battery and a pair of loaded battery terminal voltage measurements is taken during this pulse. A difference between the voltage measurements is computed. This difference can be expressed as a rate of change, a slope, or a polarization angle, and can be used with stored data from similar batteries to determine remaining energy of the battery. A quiescent battery voltage can also be used in combination with this technique, and/or for distinguishing between different remaining energies corresponding to the same difference, slope, or polarization angle.
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James Kristofer J.
Kelley Shawn
Cardiac Pacemakers Inc.
Schwegman Lundberg Woessner & Kluth P.A.
Tibbits Pia
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