Nickel-cadmium cells of various designs, containing polymer reinforced inorganic separators and either chemically deposited or electro-chemically deposited nickel and cadmium electrodes, have been studied for their cycle life performance. The performance goal of these Ni/Cd cells is more than 10 years of cycle life at 80 % depth of discharge operation in a geosynchronous orbit. Three alternate cycle regimes, including one with a high rate (0.4C) charging (HGEO regime), were used to test the cells. In all cycle regimes, the performance goal appears to be feasible with selected cell designs. The cycle life, in general, was longer in the HGEO cycling regime. However, in practice this HGEO cycling requires a sequential charging system which results in a tradeoff to a standard low rate charge for GEO cycling because of the extra charge control equipment needed for an HGEO regime.
Long life and low weight Ni/Cd cells for spacecraft
Ni/Cd-Zellen fuer den Weltraum mit grosser Lebensdauer und niedrigem Eigengewicht
1984
6 Seiten, 9 Bilder, 1 Tabelle, 4 Quellen
Conference paper
English
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