[amsat-bb] Re: ARISSat-1 battery
iw8qku at amsat.org
Mon Aug 29 06:09:44 PDT 2011
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)
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
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
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 ??
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