Nickel-cadmium battery cells have been used as a secondary power source for scientific satellites in Japan. Battery cells which have a capacity of 2 to 19 Ah have been mounted and have worked well in orbit during the mission life of each satellite. This paper describes the ground life test and flight data of the prototype model (PM) battery cells and on-board cells with 19 Ah capacity for the 11th scientific satellite 'GINGA'. It was lauchned from Kagoshima Space Center in Japan on February 5, 1987 and has been actively observing X-ray stars for about 4 years. It has been confirmed that the Ni-Cd PM battery cells for 'GINGA' have life characteristics of more than 25000 charge/discharge cycles at 25 % of depth of discharge (DOD). Therefore, it can be presumed that the PM cells have characteristics providing more than 5 years of life in low earth orbit.


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    Title :

    Life characteristics of Ni-Cd battery cells for scientific satellites


    Additional title:

    Lebensdauerverhalten von Ni-Cd-Zellen zum Einsatz in wissenschaftlichen Satelliten


    Contributors:
    Ishikawa, Y. (author) / Fujita, K. (author) / Hirose, M. (author) / Koubata, M. (author) / Kudoh, M. (author) / Matsui, K. (author)


    Publication date :

    1991


    Size :

    6 Seiten, 8 Bilder, 3 Tabellen, 1 Quelle



    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




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