[NSRCA-discussion] Lipo fire

[Atwood, Mark]

In a similar incident this weekend, I had an Rx pack (2s800mah) blow a cell (with a lot of smoke and heat, but no flame) when one of the balance wires came detached from the balance connector and shorted to the pin on the micro deans it brushed against in the case.  A bit of a fluke accident, but none the less, had potential to cause a serious fire.

I realize I’ve been WAY to cavalier with the number of packs of various sizes that I have sitting all over the shop.  1,2,3,4,5 and 6 cells packs, all told probably number in the hundreds when you include literally dozens of Foamy and BNF packs, Heli packs, 3cell and 4 cell sport packs and on and on.

I do not have a solution, short of building a new stone fireplace.  I’d be very open to hearing good suggestions on where to store these things, shy of an armory full of Ammo boxes.

-M
MARK ATWOOD
o.  (440) 229-2502
c.  (216) 316-2489
e.  atwoodm at paragon-inc.com<mailto:atwoodm at paragon-inc.com>

Paragon Consulting, Inc.
5900 Landerbrook Drive, Suite 205, Cleveland Ohio, 44124
www.paragon-inc.com<http://www.paragon-inc.com/>

<http://www.paragon-inc.com/>
Powering The Digital Experience

On Jun 13, 2016, at 11:15 AM, Robert Green via NSRCA-discussion <nsrca-discussion at lists.nsrca.org<mailto:nsrca-discussion at lists.nsrca.org>> wrote:


Hey guys wanted to let you know about an incident I had over the weekend that caused some high concern.  I flew four flights yesterday, then returned home.  I thought I would go back out later and fly three more, so I charged three more batteries.  The three batteries on was planning on using, were flown the previous day, and were not overly discharged.  I took my kids to the movies as my wife did not want to go, and that turned out to be the best thing for the family.  One of my 2014 packs decided that it no longer wanted to live and decided to catch fire all by itself.  I have always thought that the best time for these to catch fire, would be during the charge cycle.  This incident happened almost an hour after charging the pack.  Keep in mind that after I charged the pack, there were immediately put into my flight box for storage until I got back from the movies.  After I took them off the charger, the batteries did not see warm in any way, cool to the touch.  I have had these batteries for two and as far as I can remember - they where not damaged in any way.  Due to my wifes' heroic action, the house did not catch on fire like my toolbox did.  She brought them out to the drive way water on them to kill the flames.  I have been pretty cavalier with packs, leaving them out once they are charged and not putting them in something safe for storage....those days are done.  If this can happen to a battery sitting with a stored charge, I will not longer leave my house or family unprotected.

I bought a safe yesterday, but apparently that may not be the best thing for them either as the battery give off a gas and they need to breathe.  In other words if you left them in a safe you may be creating a bomb scenario.  What I did was - several years ago, I bought a metal ammo case.  I removed 3/4 of the rubber around the case allowing for the exchange of air to occur.

If any one has any other creative ideas on how they store there lipos, please contribute to this thread as I think it is important as a community that we spread the message that this technology which has been proven to be safe for the most part also can be dangerous.

thanks,


Robert
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