Battery charge indicator
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United States of America Patent
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-
Sep 14, 1993
Grant Date -
N/A
app pub date -
Jun 4, 1991
filing date -
Jun 4, 1991
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A battery charge indicator is permanently incorporated into a battery to indicate the state of charge. The indicator includes a compressible chamber which is filled with a viscous gel and which is exposed to the expandable cathode of the battery. As the battery discharges, the cathode expands thus causing the gel within the chamber to be extruded out through an outlet into a viewing channel in an overlying disk. The amount of gel flowing into the viewing channel is proportional to the amount of expansion of the cathode and, thus, indicates the amount of discharge and, conversely, the remaining life of the battery.
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