Battery charge indicator

Details Battery charge indicator Battery charge indicator

1991-06-04

1993-09-14

Kalafut, Stephen

Chemistry: electrical current producing apparatus, product, and

With measuring, testing, or indicating means

For charge or liquid level

429 66, 73 375, H01M 1048

Patent

active

052447545

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.

REFERENCES:
patent: 2779188 (1957-01-01), Meyer
patent: 2846871 (1958-08-01), Worthen
patent: 3563806 (1971-02-01), Hruden
patent: 4129686 (1978-12-01), Kaduboski
patent: 4957827 (1990-09-01), Kordesch et al.

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