Hi, here is another interesting link: http://www.nrel.gov/vehiclesandfuels/energystorage/news/2011/1482.html
could it be an interesting opportunity for "our birds" ? 73s Fabio IW8QKU/5 On Mon, Aug 29, 2011 at 3:09 PM, Fabio Azzarello <iw8...@amsat.org> wrote: > Hi all, > what about the following link? > > http://www.nrel.gov/features/20100708_battery.html > > 73s > Fabio > IW8QKU/5 > > > *Subject: [amsat-bb] ARISSat-1 battery > From: g0mrf@xxxxxxx > Date: Mon, 29 Aug 2011 08:50:45 -0400 (EDT) > > > Hi all. > The ARISSat team seem to have reached the conclusion that the Silver Zinc > battery technology is not really suited for > an orbiting satellite with a 55 / 35 minute charge and discharge cycle. I > wonder if a couple of small > Lithium polymer battery packs would be a suitable replacement for ARISSat-2 > ? I > note that there are safety issues with Li-ion technology, > but there are some small battery packs of 10Whr / 20Whr 30Whr modules > which > have NASA approval for manned space flight. > From the odd snippet of information on the power required during eclipse > (is it > 7 Watts for 35 minutes) it looks like 20-25% depth of discharge for the > 20Whr > battery pack. That's probably OK for a 9 month mission ?? > > Thanks > > David G0MRF > > > http://www.clyde-space.com/documents/1902* > _______________________________________________ Sent via AMSAT-BB@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
