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Old Oct 15, 2009, 02:03 AM
whatala is online now
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What fire extinguisher for lipo


Hi,
What fire extinguisher to use for lipo in case it causes fire?
Can you buy any at OSH, Home Depot?
Thanks
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Old Oct 15, 2009, 02:16 AM
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A LiPo fire is a chemical reaction and you are not going to stop it!

A multipurpose powder extinguisher to deal with any secondary fires might be a good idea.

Rob
Old Oct 15, 2009, 02:27 AM
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Quote:
Originally Posted by whatala
Hi,
What fire extinguisher to use for lipo in case it causes fire?
Can you buy any at OSH, Home Depot?
Thanks
CO2 helps to cool the battery down, extinguish it as quickly as possible and puts out the secondary fires. But they are expensive too. I recommend a LiPo Sack and hopefully you won't need an extinguisher.

Rick.
Old Oct 15, 2009, 05:25 AM
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The stuff burning at LiPo fires is not the Lithium metal itself, but the evaporating electrolyte.
So any fire extinguisher suitable for liquid or gaseous stuff will work fine with LiPos.
Old Oct 15, 2009, 06:06 AM
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I use a 2Kg sodium bi-carbonate based extinguisher suitable for ABC category fires.
Old Oct 15, 2009, 06:19 AM
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Bucket of sand?

Never tried it in real life situation, but it should work, right?
(for primary fire on the pack)
Old Oct 15, 2009, 06:29 AM
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Even better: Plastic bag with sand, placed over the LiPo.
If it catches fire, the plastic melts and the sand pours directly onto it.
Old Oct 15, 2009, 06:32 AM
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Anyway, the starting point should be that a LiPo is charged in a suitable place and a container or sack that prevents the fire from spreading.
Old Oct 15, 2009, 07:45 AM
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Quote:
Originally Posted by aa78
I use a 2Kg sodium bi-carbonate based extinguisher suitable for ABC category fires.
I use would imply that you have actually used this on an actual LiPoly fire. If this is the case then tell us more please.

Years ago I was a Tool & Die Maker and for a number of years worked in a shop that machined an awful lot of magnesium which is a metal that burns similar to a LiPolys in that most extinguishers have no effect on it. We had very expensive pressurized extinguishers and also 5 gallon buckets of a special compound on hand and needed it a few time.


Charles
Old Oct 15, 2009, 08:06 AM
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Lipo will "burn" w/o air so the bag of sand or lipo sack sound ok.

Apparently magnesium will burn in nitrogen and CO2 so require special extinguishing methods.
Old Oct 15, 2009, 08:46 AM
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Old Oct 15, 2009, 10:31 AM
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Beer? (secondary source)
Beer sounds good. I have plenty at my house
Old Oct 15, 2009, 10:35 AM
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Yes, but be sure to drink it, first.
Old Oct 15, 2009, 10:46 AM
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a few years ago I saw i lipo fire from about 5 miles away.
the cloud was atleast 500' high and 50' wide. more then likely it was alot bigger but hard to measure.
I was on my way to the field when i saw it. by the time i arrived it was out and no one was badly burned. I should have taken a picture of all the spent fire extinguishers by what was left of the 6s 5000.
the guys that used the extinguishers were blown away by how inafective thier attemps were at putting out the fire.
Old Oct 15, 2009, 11:18 AM
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You need a class D fire extinguisher. They are not cheap. The typical ABC household extinguisher will be ineffective.

I believe the powder Charles referred to is called graphite powder (Lith-X), at least that's what we have lying around when working with li-ion batteries.

Why is it so hard to find the MSDS for lipo cell? I could find some for LiMn, LifePo4, LiIon, but not Lipo?
Last edited by marc1; Oct 15, 2009 at 11:25 AM.


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