Cycle Life Evaluation of 3 Ah LixMn2O4-based Lithium-Ion Secondary Cells for Low-Earth-Orbit Satellites: I. Full Cell Results
2008 (English)In: Journal of Power Sources, ISSN 0378-7753, Vol. 185, no 2, 1444-1453 p.Article in journal (Refereed) Published
Lithium-ion batteries are a candidate for the energy storage system onboard low-earth-orbit satellites. Cycle life performance under both orbital and terrestrial conditions must be investigated in order to evaluate any inadvertent effects due to the former and the validity of the latter, with a successful comparison allowing for the extension of terrestrial experimental matrices in order to identify the effects of ageing. The orbital Performance of LixMn2O4-based pouch cells onboard the microsatellite REIMEI was monitored and compared with terrestrial experiments, with the cells found to be unaffected by orbital conditions. A lifetime matrix of different cycling depths-of-discharge (DODs: 0,20,40%) and temperatures (25, 45 degrees C) was undertaken with periodic reference performance tests. A decrease in both the cell end of-discharge cycling voltage and capacity was accelerated by both higher temperatures and larger DODs. Impedance spectra measured for all ageing conditions indicated that the increase was small, manifested in a state-of-charge dependent increase of the high-frequency semi-circle and a noticeable increase in the high-frequency real axis intercept. An evaluation of the change of both the resistance and capacity of 3 Ah cells led to the development of a potential prognostic state-of-health indicator. The use of elevated temperatures to accelerate cell ageing was validated.
Place, publisher, year, edition, pages
2008. Vol. 185, no 2, 1444-1453 p.
Lithium-ion; LEO satellite; Ageing
IdentifiersURN: urn:nbn:se:kth:diva-8330DOI: 10.1016/j.jpowsour.2008.07.070ISI: 000261748900125ScopusID: 2-s2.0-56249138923OAI: oai:DiVA.org:kth-8330DiVA: diva2:13622
QC 20100618. Uppdaterad från submitted till published (20100708).2008-05-062008-05-062010-07-09Bibliographically approved