The Performance of the Lithium-Ion Secondary Cells under Micro-Gravity Conditions—In-Orbit Operation of the Interplanetary Spacecraft ‘HAYABUSA’

‘HAYABUSA’ is a Japanese interplanetary spacecraft for the exploration of an asteroid named ‘ITOKAWA.’ The spacecraft is powered by a 13.2 Ah lithium-ion secondary battery. To realize maximum performance of the battery for long flight operation, the state-of-charge (SOC) of the battery was maintaine...

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Bibliographic Details
Published in:Denki kagaku oyobi kōgyō butsuri kagaku 2007/07/05, Vol.75(7), pp.518-522
Main Authors: SONE, Yoshitsugu, OOTO, Hiroki, KUBOTA, Masaaki, YAMAMOTO, Masahiro, YOSHIDA, Hiroyuki, EGURO, Takashi, SAKAI, Shigeru, YOSHIDA, Teiji, UNO, Masatoshi, HIROSE, Kazuyuki, TAJIMA, Michio, KAWAGUCHI, Jun’ichiro
Format: Article
Language:English
Subjects:
Aerospace
In-Orbit
Lithium-Ion Secondary Cell
Micro Gravity
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Summary:‘HAYABUSA’ is a Japanese interplanetary spacecraft for the exploration of an asteroid named ‘ITOKAWA.’ The spacecraft is powered by a 13.2 Ah lithium-ion secondary battery. To realize maximum performance of the battery for long flight operation, the state-of-charge (SOC) of the battery was maintained at ca. 65% during storage in case it is required for contingency operations. To maintain this SOC condition, the battery is charged once a week. We further charge the battery up to 4.1 V/cell using bypass circuits to balance the cells every four months. The capacity of the battery was measured during the flight operation, which revealed the appropriate capacity for the expected mission.
ISSN:1344-3542
2186-2451
DOI:10.5796/electrochemistry.75.518