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[DPRG] Lipo fire in nbot?

Subject: [DPRG] Lipo fire in nbot?
From: Rud Merriam k5rud at arrl.net
Date: Tue Apr 16 22:48:25 CDT 2013

Don't forget that you are probably carrying a LiPo in your pocket or on 
your belt. Most cell phones now have LiPos.


- 73 -
*Rud Merriam K5RUD
* /Mystic Lake Software <http://mysticlakesoftware.com/>
/

On 4/16/2013 7:22 PM, Paul Bouchier wrote:
> I was down at Mike's Hobby Shop buying a LiPo charging bag (large size 
> $15 - good insurance motivated by David's pix) and they told me they 
> had a fire in one of the pits rooms caused by a 1-cell lipo that had 
> been excessively discharged. They said it shut their whole operation 
> down for 3 days. I didn't realize just how volatile those things are 
> till I googled lipo fire!
>
> I have a low-voltage alarm on each one when in use: 
> http://www.ebay.com/itm/LIPO-2s-4s-BATTERY-LOW-VOLTAGE-THRESHOLD-ALARM-/281091719966?pt=US_Radio_Control_Control_Line&hash=item41725f431e 
> - another $5 of insurance.
>
> Seems like one should treat them like one would a small container of 
> gasoline - gently.
>
> Paul
>
>
> On Mon, Apr 15, 2013 at 3:57 PM, Huff, Brian L <bhuff at uta.edu 
> <mailto:bhuff at uta.edu>> wrote:
>
>     Hello David,
>     I am sorry for your loss. LiPo's can be nasty.  I keep telling my
>     students to be very careful with them.  Seeing is believing.
>     Brian Huff
>     UTA
>     ------------------------------------------------------------------------
>     *From:* dprglist-bounces at dprg.org
>     <mailto:dprglist-bounces at dprg.org> [dprglist-bounces at dprg.org
>     <mailto:dprglist-bounces at dprg.org>] On Behalf Of David Anderson
>     [davida at smu.edu <mailto:davida at smu.edu>]
>     *Sent:* Monday, April 15, 2013 2:37 PM
>     *To:* Paul Bouchier; dprglist at dprg.org <mailto:dprglist at dprg.org>
>     *Subject:* Re: [DPRG] Lipo fire in nbot?
>
>     Hi Paul,
>
>     Alas it's true.  nBot and the Boeing 787 Dreamliners.
>
>     I've been using a pair of 6S LiPo packs in series for nBot's
>     power, for about 8 months now.   Left the robot overnight in my
>     car a few weeks ago, wrapped up in a heavy sweatshirt inside of a
>     leather carrying case.  Next morning the car was full of smoke.
>
>     Before:
>
>     <http://geology.heroy.smu.edu/dpa-www/robo/nbot/fire/nbot5-08x.jpg> <http://geology.heroy.smu.edu/dpa-www/robo/nbot/fire/nbot5-08x.jpg>
>     <http://geology.heroy.smu.edu/dpa-www/robo/nbot/fire/nbot5-07x.jpg> <http://geology.heroy.smu.edu/dpa-www/robo/nbot/fire/nbot5-07x.jpg>
>
>     After:
>
>     <http://geology.heroy.smu.edu/dpa-www/robo/nbot/fire/nbot_fire_01.jpg>
>     <http://geology.heroy.smu.edu/dpa-www/robo/nbot/fire/nbot_fire_01.jpg>
>     <http://geology.heroy.smu.edu/dpa-www/robo/nbot/fire/nbot_fire_02.jpg>
>     <http://geology.heroy.smu.edu/dpa-www/robo/nbot/fire/nbot_fire_02.jpg>
>
>
>     Mike of Mike's Hobby says he seen this a couple of times,
>     apparently from some sort of internal short or flaw.
>
>     Pretty much destroyed everything from the second deck, upward. 
>     I'm about 1/2 way through the rebuild.   Going back to NiMH cells.
>
>     I think I'm lucky my car didn't burn up.  There are some burn
>     marks on the back of the driver's seat, but that's about it.  And
>     despite vigorous use of carpet cleaner and Simple Green, the whole
>     car still smells like flaming robot.   A cautionary tale...
>
>     dpa
>
>
>
>
>
>     On 04/15/2013 09:49 AM, Paul Bouchier wrote:
>>     Hi David,
>>
>>     I heard you had a Lipo catch fire in nbot - is that correct? Was
>>     the robot damaged? That's pretty alarming - do you know the cause?
>>
>>     Paul
>
>
>
>
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