Chemistry: electrical current producing apparatus – product – and – With measuring – testing – or indicating means – For charge or liquid level
Patent
1992-08-17
1994-11-01
Kalafut, Stephen
Chemistry: electrical current producing apparatus, product, and
With measuring, testing, or indicating means
For charge or liquid level
429 70, H01M 1048
Patent
active
053606825
ABSTRACT:
A battery charge indicator is disclosed which is permanently incorporated into a battery to indicate the state of charge. The indicator includes a compressible chamber such as a blister which is adapted to be installed in a battery as an assembly. The blister chamber is filled with a viscous gel and 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. A battery charge indicator is also disclosed in which the expansion of the cathode is adapted to apply localized pressure to a disk. The localized pressure applied to the disk causes stretching of the material of the disk, which causes a visual indication of the state of charge of the battery.
REFERENCES:
patent: 3218858 (1965-11-01), Van Woert
patent: 3563806 (1971-02-01), Hruden
patent: 4129686 (1978-12-01), Kaduboski
patent: 4203065 (1980-05-01), Whitford
patent: 4992344 (1991-02-01), Coppers
Display Matrix Corporation
Kalafut Stephen
McQuillan John Q.
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