DocumentCode :
1148834
Title :
Nickel-Cadmium Batteries as Capacitive Filters for Pulsed Loads
Author :
Gearing, Gregory M. ; Cimino, Michael B. ; Terzuoli, Andrew J., Jr. ; Fritts, David H. ; Leonard, John F.
Author_Institution :
Air Force Institute of Technology
Issue :
5
fYear :
1985
Firstpage :
644
Lastpage :
653
Abstract :
This investigation consisted of several tests of specially fabricated nickel-cadmium batteries having circular disk-type electrodes. These batteries were evaluated as filter elements between a constant current power supply and a 5 Hz pulsed load demanding approximately twice the power supply current during the load on a portion of the cycle. Short tests lasting 104 cycles were conducted at up to a 21 C rate and an equivalent energy density of over 40 J/Ib. In addition, two batteries were subjected to 10h dischar cycles, one at a 6.5 C rate and the other at a 13 C rate. Assuming an electrode-to-battery weight ratio of 0.5, these tests represent an energy density of about 7 and 14 J/Ib, respectively. Energy density, efficiency, capacitance, average voltage, and available capacity were tracked during these tests. After 10y capacity degradation was negligible for one battery and about 20 percent for the other. Cadmium electrode failure may be the factor limiting lifetime at extremely low depth of discharge cycling. The output was examined and a simple equivalent circuit was proposed.
Keywords :
Batteries; Cadmium; Capacitance; Circuit testing; Current supplies; Degradation; Electrodes; Filters; Pulsed power supplies; Voltage;
fLanguage :
English
Journal_Title :
Aerospace and Electronic Systems, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-9251
Type :
jour
DOI :
10.1109/TAES.1985.310593
Filename :
4104119
Link To Document :
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