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Characterization testing of a 40 ampere hour bipolar nickel-hydrogen batteryExtensive characterization testing has been done on a second 40-ampere hour (A h), 10-cell, bipolar nickel-hydrogen (Ni-H2) battery, to study the effects of operating parameters such as charge and discharge rates, temperature, and pressure on capacity, A h and watt hour (W h) efficiencies, and end-of-charge and midpoint discharge voltages. Testing to date has produced many interesting results, with the battery performing well throughout the test matrix except during the high-rate (5 C and 10 C) discharges, where poorer than expected results were observed. The exact cause of this poor performance is, as yet, unknown. Small scale 2 in. x 2 in. battery tests are to be used in studying this problem. Low earth orbit cycle life testing at a 40-percent depth of discharge and 10 C is scheduled to follow the characterization testing.
Document ID
19900046885
Document Type
Reprint (Version printed in journal)
Authors
Brewer, Jeffrey C. (NASA Marshall Space Flight Center Huntsville, AL, United States)
Manzo, Michelle A. (NASA Marshall Space Flight Center Huntsville, AL, United States)
Gemeiner, Russel P. (NASA Lewis Research Center Cleveland, OH, United States)
Date Acquired
August 14, 2013
Publication Date
February 1, 1990
Publication Information
Publication: Journal of Power Sources
Volume: 29
ISSN: 0378-7753
Subject Category
SPACECRAFT PROPULSION AND POWER
Distribution Limits
Public
Copyright
Other