Life cycle test results are summarized from more than 300 spaceflight qualified nickel-hydrogen (NiH2) battery cells currently on life test. Cells ranging in size from 4 ampere-hours (Ah) to 120 Ah are being tested under a variety of conditions to support current NiH2 battery applications. Results to date include 55,600 accelerated LEO cycles at 30 % DOD; 102,840 accelerated LEO cycles at 15 % DOD; 44,900 cycles under a real-time LEO profile; 33,100 cycles in real-time LEO; 30 accelerated GEO eclipse seasons and 7 real-time GEO eclipse seasons, both at 75 % DOD maximum. Alternative separator materials have completed more than 40,00 charge/discharge cycles in accelerated LEO testing and advanced design electrocatalytic hydrogen electrodes have completed more than 16,000 cycles in real-time LEO testing. Common pressure vessel cell designs have completed 18,000 cycles in real-time LEO testing at 45 % DOD.
Life cycle evaluation of spaceflight qualified nickel-hydrogen batteries
Bewertung der Lebensdauer von raumflugtauglichen Nickel-Wasserstoffbatterien
1995
6 Seiten, 12 Bilder, 1 Tabelle, 3 Quellen
Aufsatz (Konferenz)
Englisch
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