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Characterization of the 20-Ah nickel-cadmium cell used for energy storage on the Orbiting Astronomical ObservatoryTests were conducted on 20-Ah sealed nickel cadmium cells to evaluate initial and long-term performance at various charge rates, temperatures and voltage-control levels. An average ampere-hour recharge of 103 percent per orbit at 13 C was able to maintain cell capacity; required watt-hour recharge on an orbital basis was 8 to 10 percent greater than required ampere-hour recharge. Cells exhibited an early life burn-in characteristic. A discharge after periods of repetitive cycling yielded two voltage plateaus which were temporarily eliminated by the discharge.
Document ID
19730002313
Acquisition Source
Legacy CDMS
Document Type
Technical Memorandum (TM)
Authors
Ford, F. E. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Date Acquired
September 2, 2013
Publication Date
September 1, 1972
Subject Category
Auxiliary Systems
Report/Patent Number
NASA-TM-X-66093
X-761-72-330
Accession Number
73N11040
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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