[amsat-bb] Re: ARISSat-1 battery
iw8qku at amsat.org
Mon Aug 29 08:17:41 PDT 2011
here is another interesting link:
could it be an interesting opportunity for "our birds" ?
On Mon, Aug 29, 2011 at 3:09 PM, Fabio Azzarello <iw8qku at amsat.org> wrote:
> Hi all,
> what about the following link?
> *Subject: [amsat-bb] ARISSat-1 battery
> From: g0mrf at 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
> 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
> battery pack. That's probably OK for a 9 month mission ??
> David G0MRF
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