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Posted by Andrew Gabriel on April 29, 2008, 3:59 am
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> Will wrote:
>>
>> Can someone recommend a two sided tape that also has some thermal insulation
>> properties? I am replacing 10 12V batteries in an APC Symmetra UPS
>> battery enclosure and the batteries are grouped in five groups of two.
>> Each set of two is stuck together using a two sided tape with some thickness
>> to keep the batteries from heating each other.
I really doubt it's anything to do with batteries heating each
other -- they both give off the same heat. The pads will just
be to take up imperfections in the sides of the batteries and
limit movement. They are far to small to generate a space for
heat convection.
>> Can someone recommend a two
>> sided tape that also acts as a spacer and thermal insulator? The Symmetra
>> design sometimes overheats older batteries if you don't replace them soon
>> enough, so I need the tape to stay intact and not burn in a very very hot
>> environment (just planning for the worst case event). I was using velcro
>> in one experiment, but that added a bit too much space between each battery.
>
> How much space between batteries do you need, or can you tolerate?
>
> There are thin foam pads with adhesive on both sides, maybe 1 or 2 mm
> thick. They should be available at most hardware stores.
>
> If you are dealing with high temperatures (50°C or higher) you might
> want to contact a manufacturer's rep for something more suitable. The
> general purpose stuff might break down over time under such conditions.
Batteries only last a few years in these applications anyway.
They are handled roughly by the charging circuits (supposedly
to ensure they are ready for another discharge cycle really
quickly, but I've never understood why that requires continuous
overcharging).
--
Andrew Gabriel
[email address is not usable -- followup in the newsgroup]
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