Method and system for monitoring the condition of a battery pack in a defibrillator
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United States of America Patent
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Nov 9, 1999
Grant Date -
N/A
app pub date -
Aug 19, 1997
filing date -
Aug 19, 1997
priority date (Note) -
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status (Latency Note)
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Abstract
A method and system for monitoring the capacity of a battery pack (6) is provided. The battery pack (6) is capable of delivering current to a load (R.sub.L). The battery pack (6) includes a monitor cell (C4) and battery cells (C1, C2, and C3). The monitor cell (C4) has a predetermined initial energy level that is lower than the predetermined initial energy level of the battery cells. A monitoring system (22) including an analog-to-digital converter (10) and a microprocessor (12) is connected to the battery pack and monitors the voltage of the battery pack. When the monitoring system detects a voltage change indicating depletion of the monitor cell (C4), the monitoring system provides a signal indicative that the battery pack is nearing depletion.
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