NASA's Galileo mission to Jupiter, to be launched by means of the STS in May of 1985, will consist of an orbiter and a probe, the probe being instrumented to descend through and analyze the Jovian atmosphere. All power for the probe will be supplied by three battery modules containing a total of 39 D size Li/SO2 cells which will be required to retain their capacity for the over 50 months of the mission and then provide current at the 3-4 A rate for 48 min. Each module consists of 13 high-rate D cells fabricated specifically for the Galileo mission according to a strict manufacturing control document. These cells differ from more conventional cells in that the cathodes and anodes are 100 % weight sorted to assure uniform capacity; the anode lead has been reinforced to withstand the launch vibration environment; Although the final electrical test has not yet been performed with modules, several electrical simulations (including 150 day real time coast simulation) have been performed with 39 cells configured electrically as a battery. Most recently, cells identical to those planned for flight were tested in this manner. This test indicated that at the specified end of mission, 0.1 bar + 48 min, the depth of discharge was 87.2 %, indicating a capacity margin of 12.8 %. The minimum 16.0 V limit for the 11 pyro pulses was also readily met.
Qualification of the Galileo probe prototype Li/SO2 battery
Qualifikation der Li/SO2-Prototypbatterie fuer die Galileo-Sonde
1982
3 Seiten, 2 Bilder, 2 Tabellen
Conference paper
English
NTRS | 1997
|IEEE | 1996
|Online Contents | 1996
|British Library Conference Proceedings | 1997
|Galileo probe battery systems design
Tema Archive | 1986
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