[AR] Re: Thinsats
- From: Henry Spencer <hspencer@xxxxxxxxxxxxx>
- To: Arocket List <arocket@xxxxxxxxxxxxx>
- Date: Mon, 26 Feb 2018 19:33:23 -0500 (EST)
On Mon, 26 Feb 2018, JOHN HALPENNY wrote:
I thought one of the limits to battery life was the number of cycles.
How long do batteries last if they are cycled every 90 minutes?
Depends on *how deeply* they are cycled. The more cycles you want to put
on them, the shallower each cycle can be, although the exact relationship
depends a little on the exact battery technology. If you want to put a
*lot* of cycles on them, e.g. for a long-lived LEO satellite, you might
end up using only 10-20% of the nominal capacity of your battery -- which
means it weighs a lot more than you might naively expect.
Henry
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