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Author Topic: Hubble batteries  (Read 1550 times)
djs63
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« on: March 22, 2015, 10:31:13 AM »

Just reading about the life expectancy of the Hubble space telescope's components and they are expected to last at least until 2020 (Astronomy Now. April 2015). " it's batteries are in excellent shape"
Does anyone down here know what kind they are please? I assume they are powered by PV and are some kind of lithium....... But it was launched in 1990 and reading about the repair missions since then no one mentions replacing the batteries. They presumably have had numerous cycles.
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dhaslam
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« Reply #1 on: March 22, 2015, 10:58:47 AM »

Even in space cheating is allowed, they can change  batteries if necessary.   

http://www.nasa.gov/mission_pages/hubble/servicing/SM4/main/Battery_FS_HTML.html
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dan_b
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« Reply #2 on: March 22, 2015, 02:24:18 PM »

Although not any more since the Shuttle was retired and NASA has no means of flying its own astronauts into space, let alone outside of the ISS orbit...
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Scruff
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« Reply #3 on: March 22, 2015, 03:24:25 PM »

in space cheating is allowed

Amongst the effective but toxic technologies:
Gallium arsenide PV panels
Radioisotope thermoelectric generators.
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oliver90owner
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« Reply #4 on: March 22, 2015, 09:45:00 PM »

An observation.

I liked the link provided by dhaslam.  Unfortunately the reference to the weight of the batteries seemed to be related to the astronauts actually replacing them. 

They should, of course, referred to mass not weight.  The weight would only be important for lift-off to orbit, after which those batteries will be as weightless as the astronauts themselves!
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djs63
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« Reply #5 on: March 23, 2015, 10:45:04 AM »

The NASA link by dhaslam is succinct and very interesting and I think we should nominate biff to NASA as a honorary Electrical Systems Power Engineer since he monitors his batteries carefully and frequently! However, he has obviously been busy for Navitron as a moderator (thank you) and he hasn't mentioned scaffolding all year!
David
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