Method and system for determining state-of-health of a lead-acid defibrillator battery using an intelligent system
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United States of America Patent
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Dec 23, 2003
Grant Date -
Mar 27, 2003
app pub date -
Apr 15, 2002
filing date -
Mar 12, 1997
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method of and system for determining the state-of-health of a lead acid battery of the type commonly used in portable external defibrillators comprises detecting an impedance characteristic of the battery at at least one selected frequency, counting the number of complete charge/discharge cycles that the battery undergoes, and determining the state of health of the battery from a fuzzy system trained in a relationship between the impedance characteristic and the cycle number of the lead acid battery and the state-of-health, wherein the state-of-health is a function of and varies with the battery's ability to deliver power required by the load and the battery's capacity to meet load requirements.
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