Method and apparatus for determining a replacement time of...

Details Method and apparatus for determining a replacement time of... Method and apparatus for determining a replacement time of...

2011-03-22

2011-03-22

Kahelin, Michael (Department: 3762)

Surgery: light, thermal, and electrical application

Light, thermal, and electrical application

Electrical therapeutic systems

Reexamination Certificate

active

07912546

ABSTRACT:
In a method and apparatus for determining the replacement time of an electric battery in an implantable medical device, the battery being a hybrid battery with a combination of at least two electrode materials, one of which having better properties for high current pulsing and the other of which being a high energy density material, an electrical pulse of a predetermined duration and predetermined amplitude is drawn from the battery. The pulse amplitude significantly exceeds a base current drawn from the battery. The difference between voltages measured across the battery terminals before the pulse is emitted and at an end of the pulse is determined. The battery replacement time is determined from the voltage difference according to a predetermined criterion.

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