A Sodium Sulfur (NaS) battery cell for space applications has been in development, with Air Force sponsorship, since the early 1980's. At 100 Wh/kg, NaS batteries have twice the energy density of advanced nickel hydrogen (NiH2) battery designs. Yet, the NaS battery cell is radically different from either nickel cadmium (NiCd) or NiH2 battery cells in two ways. First, NaS cells have a solid ceramic versus a liquid aqueous electrolyte. Second, NaS operates at 350 deg C versus 20 deg C for NiH2 and NiCd. How this unique battery cell operates in the zero-g environment of space is the purpose of the flight experiment described herein. The U.S. Ais Force Phillips Lab has tasked the U.S. Naval Research Laboratory (NRL) to design, fabricate and integrate a NaS battery cell flight experiment. The experiment will fly with the Wake Shield Facility Cross Bay Carrier on a NASA Space Shuttle launch in November 1996. The experiment will heat-up, cool-down and operate four series connected NaS cells through three different charge/discharge profiles. After the experiment is complete, the NaS battery cells will be returned to the PL for destructive physical analysis. This paper will describe the NRL experiment implementation and design.
Sodium sulfur battery cell space flight experiment
Raumfahrttauglichkeit von Natrium-Schwefelbatteriezellen
1995
6 Seiten, 5 Bilder, 1 Quelle
Aufsatz (Konferenz)
Englisch
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