[amsat-bb] ARISSat-1 battery

[g0mrf at aol.com]

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