Battery with coulometric state of charge indicator

Details Battery with coulometric state of charge indicator Battery with coulometric state of charge indicator

1993-08-09

1995-05-23

Maples, John S.

Chemistry: electrical current producing apparatus, product, and

With measuring, testing, or indicating means

For charge or liquid level

429 91, 429162, 429191, 429192, 429219, 429220, H01M 1048, H01M 618, H01M 436

Patent

active

054180864

ABSTRACT:
A thin film coulometer for use as a battery state of charge indicator in which the indicator is located on a battery and connected in parallel across a current path of a resistive segment of the battery so that during discharge, the coulometer can be observed to indicate the capacity of the battery. The coulometric charge indicator device may have a variable thickness construction and include indicia which are produced upon battery discharge.

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R. R. Secunde and A. G. Birchenough, NASA Technical Note NASA TND-5773, National Aeronautics and Space Admin. Washington, D.C., Jul. 1970.
J. H. Kennedy and F. Chen, J. Electrochem. Soc., 118, 1043, (p. 84), 1971 (no month).

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