[amsat-bb] Ni-Cd Batteries on Satellites

[Diane Bruce]

On Fri, Mar 13, 2020 at 06:56:55PM -0300, Pedro Converso via AMSAT-BB wrote:
> LO-19 (aka LUSAT) after 30 years in space is emitting day and night a
> strong carrier.
> 
> What is amazing that after over 2 millions charge/discharge cycles its
> vintage NI-CD batteries are still able to receive and hold charge.
> 
> It is known that Lithium based batteries usually halve charge capacity
> after +/- 400 cycles, probably you noticed that on your portable
> device. https://batteryuniversity.com/_img/content/lithium2.jpg
> 
> This is just a comment for future satellite plans if long duration is
> part of the objective.

Super capacitors are very quickly maturing and are a possiblity in future
missions.

https://batteryuniversity.com/learn/article/whats_the_role_of_the_supercapacitor

Also from 2018
https://www.electronicsweekly.com/news/design/will-supercapacitors-supersede-batteries-2018-11/

If a satellite was limited to use only in Sunlight with a small supercap
for periods in eclipse to hold config etc. this might be a practical
solution now. It's a rapidly changing field.

> 
> 73, lu7abf, Pedro

73, VA3DB, Diane
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