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<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Chris,<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>i would agree that this is where something
happened. I wish i knew from looking at hte pack after pulling it off the
charger that something was wrong. i wonder what a good warning system would
look like.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
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color=black face="Times New Roman"><span style='font-size:12.0pt;color:windowtext'>
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<p class=MsoNormal><b><font size=2 color=black face=Tahoma><span
style='font-size:10.0pt;font-family:Tahoma;color:windowtext;font-weight:bold'>From:</span></font></b><font
size=2 color=black face=Tahoma><span style='font-size:10.0pt;font-family:Tahoma;
color:windowtext'> Chris Moon [mailto:cjm767driver@hotmail.com] <br>
<b><span style='font-weight:bold'>Sent:</span></b> Monday, June 13, 2016 2:56
PM<br>
<b><span style='font-weight:bold'>To:</span></b> Robert Green; General pattern discussion<br>
<b><span style='font-weight:bold'>Subject:</span></b> Re: [NSRCA-discussion]
Lipo fire</span></font><font color=black><span style='color:windowtext'><o:p></o:p></span></font></p>
</div>
<p class=MsoNormal><font size=3 color=black face="Times New Roman"><span
style='font-size:12.0pt'><o:p> </o:p></span></font></p>
<p><font size=3 color=black face="Times New Roman"><span style='font-size:12.0pt'>Glad
everyone is ok there Robert.<o:p></o:p></span></font></p>
<p><font size=3 color=black face="Times New Roman"><span style='font-size:12.0pt'>I
have handled and dissected hundreds of different packs during my time in
business, evaluating samples etc and I can say with certainty the weakest link
in our batteries are the balance leads and their connections to the individual
cells. These are very thin wires that typically are spot soldered to tiny tabs
on the cells and crimped into tiny pin connectors. Insulation of the balance
wires inside a pack is usually a thin piece of cellophane looking tape.There is
little to no strain relief for the wires and we handle and flex them every time
they are charged. I have seen many break off and touch others creating sparks
and possibly could have lead to fires if they were pressed together long
enough. I would bet this is what happened to Robert's pack. The
batteries themselves must pass through pretty rigorous testing including being
crushed with a metal blade without catching on fire before they will be
transported from <st1:country-region w:st="on"><st1:place w:st="on">China</st1:place></st1:country-region>.
These testing documents accompany every large battery shipment so it is highly
unlikely one would spontaneously combust. With an older pack, it most
definitely sounds like an internal short of balance leads.<o:p></o:p></span></font></p>
<p><font size=3 color=black face="Times New Roman"><span style='font-size:12.0pt'>Chris<o:p></o:p></span></font></p>
<p><font size=3 color=black face="Times New Roman"><span style='font-size:12.0pt'><o:p> </o:p></span></font></p>
<p><font size=3 color=black face="Times New Roman"><span style='font-size:12.0pt'><o:p> </o:p></span></font></p>
<div>
<p class=MsoNormal><font size=3 color=black face="Times New Roman"><span
style='font-size:12.0pt'>On 6/13/2016 11:15 AM, Robert Green via
NSRCA-discussion wrote:<o:p></o:p></span></font></p>
</div>
<blockquote style='margin-top:5.0pt;margin-bottom:5.0pt'
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<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><u5:p> </u5:p></span></font><o:p></o:p></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>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. <u5:p></u5:p></span></font><o:p></o:p></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><u5:p> </u5:p></span></font><o:p></o:p></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>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.<u5:p></u5:p></span></font><o:p></o:p></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><u5:p> </u5:p></span></font><o:p></o:p></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>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.<u5:p></u5:p></span></font><o:p></o:p></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><u5:p> </u5:p></span></font><o:p></o:p></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>thanks,<u5:p></u5:p></span></font><o:p></o:p></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><u5:p> </u5:p></span></font><o:p></o:p></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><u5:p> </u5:p></span></font><o:p></o:p></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Robert<u5:p></u5:p></span></font><o:p></o:p></p>
<p class=MsoNormal><font size=3 color=black face="Times New Roman"><span
style='font-size:12.0pt'><br>
<br>
<br>
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<pre><font size=2 color=black face="Courier New"><span style='font-size:10.0pt'>_______________________________________________<o:p></o:p></span></font></pre><pre><font
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