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Old Apr 15, 2008, 01:29 PM
mexico is offline
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I purposely shorted a small 3 cell lipo last night to dispose of it. It took a good 1 1/2 - 2 minutes before it started to smoke and swell. It never did flame. I have done this 3 or 4 times now and have never gotten a lipo to flame. Maybe because they were old, tired packs that were not fully charged. I did it outdoors. Had it happened in my house the smell would have been bad.
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Old Apr 15, 2008, 02:49 PM
gravityKills is offline
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Quote:
Originally Posted by mondo1948
I think this is a good idea. Any thoughts?
OK, since you asked for my thoughts (usually I keep them to myself), sounds like a great academic idea that is going to fail spectacularly in reality.
Old Apr 15, 2008, 02:56 PM
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Quote:
Originally Posted by mondo1948
I think this is a good idea. Any thoughts?
I think that's a pretty good idea considering what you have to work with.
Most people don't even think nearly that far ahead.

mw
Old Apr 15, 2008, 03:50 PM
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Quote:
Originally Posted by gravityKills
OK, since you asked for my thoughts (usually I keep them to myself), sounds like a great academic idea that is going to fail spectacularly in reality.
Okay,
I have your thoughts but I would like to know WHY you think it is going to fail "spectacularly". It would be great if you would explain. Is your thinking that I should be using a lipo sack, because to tell you the truth, I've ordered a few since I saw the video of the lipo sack containing a burning lipo....it appeared to better contain the energy than the battery bunker.

Mondo
Old Apr 15, 2008, 11:01 PM
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Quote:
Originally Posted by mexico
I purposely shorted a small 3 cell lipo last night to dispose of it. It took a good 1 1/2 - 2 minutes before it started to smoke and swell. It never did flame. I have done this 3 or 4 times now and have never gotten a lipo to flame. Maybe because they were old, tired packs that were not fully charged. I did it outdoors. Had it happened in my house the smell would have been bad.
Here's a video of a guy poking a pack -
http://ribolabs.wordpress.com/2007/0...ry-fire-video/
Old Apr 16, 2008, 12:09 AM
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Quote:
Originally Posted by mondo1948
Okay,
I have your thoughts but I would like to know WHY you think it is going to fail "spectacularly". It would be great if you would explain. Is your thinking that I should be using a lipo sack, because to tell you the truth, I've ordered a few since I saw the video of the lipo sack containing a burning lipo....it appeared to better contain the energy than the battery bunker.

Mondo
because according to Murphy's law things that can go wrong will go wrong...
for example you'll be five seconds late to turn on the fan, and then the smoke is in the room. The fan would need a huge capacity - have you seen what the fire brigade uses to clear smoke out of buildings, it looks suspiciously like an ultralight plane motor...

My point is, if the smoke will cause damage, that's fine, problem recognized, charge the LiPos somewhere else. But don't create a false sense of safety unless you are sure your solution is reliable.

PS, "spectacularly" (taking Murphy's law to the edge), the fan adds fresh oxygen to the fire
Old Apr 23, 2008, 12:40 AM
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And I think one safe bag for charging the battery is needed

Becarefull of your and your family lives
Old Apr 23, 2008, 03:50 AM
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Quote:
Originally Posted by mondo1948
Hi Guys,
In reading some of this post, I realized that while I have battery bunkers to charge my batteries in, I hadn't thought about the heavy smoke that could ruin my home. I live in a condo with no basement, so I've been charging my lipo batteries on a bookshelf in my family room, setting the battery bunkers on large ceramic tiles that are fireproof. After looking at a video of an exploding lipo, I realized that the smoke may be a big problem....not just the flame exiting from the battery bunker. So, here's my solution that I'd like to share.

I've placed my 12 volt power source, balancing charger and battery bunker on the toilet tank in my family room bathroom (they fit comfortably). Thus, if a battery blows up, I can turn on the ceiling exhaust fan in the bathroom and hopefully get most of the smoke out of the house quickly (the fan is vented through the roof to the outside, not into the attic).

I think this is a good idea. Any thoughts?

Thanks in advance,
Mondo
Better idea!
Turn on bathroom fan.
Turn off toilet tank water supply.
Flush toilet, emptying tank.
Charge battery in tank with lid on.
Close bathroom door.
Old May 16, 2008, 11:10 AM
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So much for water conservation!
Old May 16, 2008, 02:37 PM
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could you place a battery bunker liposack whatever in a large sealed-ish plastic container wit an air filter to let expanding gases out and keep smoke in

yes.. no... i'm an idiot?
Old May 16, 2008, 02:39 PM
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No. There will be too much gas and smoke to contain in a simple plastic container.

mw
Old May 16, 2008, 02:41 PM
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He did say with an air filter. I just don't think a typical air filter will do anything for the smoke. You would have to have an activated carbon filter, and even then I don't know if it would have any effect or not.
Old May 16, 2008, 03:03 PM
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HEPA filters most defiantly catch the smoke but is it wrthe the cost
Old May 16, 2008, 07:01 PM
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Frankenstein recycled packs
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Keep in mind the escaping/burning gasses are very corrosive. I read on here one time that within a couple months everything in the house with exposed metal corroded. TV, VCR, DVD player, PC....
Do it in a shop in a metal container with an exhaust vent to the outdoors.

Rick
Old May 17, 2008, 01:09 AM
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ok... another crazy idea. what about at temperature probe that got taped onto the battery during charging and if it hit too high a temp it would stop the charge or can lipo's spontaneously combust without hitting a critical temperature


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