Randolph K. Armstrong;Timothy L. Scott;Scott A. Armstrong;D. Michael Inman
发明人:
Randolph K. Armstrong,Scott A. Armstrong,D. Michael Inman,Timothy L. Scott
申请号：
US12725962
公开号：
US08560070B2
申请日:
2010.03.17
申请国别(地区):
US
年份:
2013
代理人:
摘要：
A method and an apparatus for determining a time period remaining in a useful life of an energy storage device in an implantable medical device. The method may include measuring a voltage of the energy storage device to produce a measured voltage, and comparing the measured voltage to a transition voltage. While the measured voltage is greater than or equal to the transition voltage, the time period remaining in the energy storage device's useful life is approximated based upon a function of charge depleted. While the measured voltage is less than the transition voltage, the time period remaining in the energy storage device's useful life is approximated based upon a higher order polynomial function of the measured voltage. The transition voltage corresponds to a predetermined point on a energy storage device voltage depletion curve representing the voltage across the energy storage device over time.
