<font size=2 face="sans-serif">Hi:</font>
<br>
<br><font size=2 face="sans-serif">I cant put out anything which may show
proprietary info, but here are a couple close up fragments of images of
failure trials where the BMS system was not able to catch the issue before
the event went out of bounds thermal.</font>
<br>
<br><img src=cid:_1_0DA10E600DA0FB7C0074789B88257E0B><font size=2 face="sans-serif">
</font><img src=cid:_1_0DA10ABC0DA0FB7C0074789B88257E0B>
<br>
<br><font size=2 face="sans-serif">As you can see some kind of corrosive
gas coated many surfaces inside the battery pack while reacting with and
discoloring any aluminium which was in the near vicinity of the cells</font>
<br>
<br><font size=2 face="sans-serif">I definitely would not use any material
other than metal or some other very chemical/heat/fire resistant materials
in and around Lion cells and I'd vent the battery pack to the outdoors.</font>
<br>
<br><font size=2 face="sans-serif">I'm sure there will be many perfectly
reliable and safe packs, but soon there will also be something like a melted
laptop or cell phone on steroids as a typical solar system battery has
about 3000X as much energy as the cell phone/laptop.</font>
<br>
<br><font size=2 face="sans-serif">JARMO<br>
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<br>
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Jarmo Venalainen</b> | </font><font size=1 color=#008000 face="Arial"><b>
Schneider Electric </b></font><font size=1 face="Arial"><b> | Xantrex
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Engineer</b> <b><br>
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| <b>Mobile:</b> +604-505-0291 <b><br>
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www.Xantrex.com</u></font></a><font size=1 face="Arial"> |
<b>Address:</b> 3700 Gilmore Way, Burnaby, BC V5G4M1 <br>
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<table width=100%>
<tr valign=top>
<td><font size=1 color=#5f5f5f face="sans-serif">From:</font>
<td><font size=1 face="sans-serif">Ray Walters <ray@solarray.com></font>
<tr valign=top>
<td><font size=1 color=#5f5f5f face="sans-serif">To:</font>
<td><font size=1 face="sans-serif">RE-wrenches <re-wrenches@lists.re-wrenches.org>,
</font>
<tr valign=top>
<td><font size=1 color=#5f5f5f face="sans-serif">Date:</font>
<td><font size=1 face="sans-serif">03/17/2015 01:35 PM</font>
<tr valign=top>
<td><font size=1 color=#5f5f5f face="sans-serif">Subject:</font>
<td><font size=1 face="sans-serif">Re: [RE-wrenches] Load testing Lithium
battery bank</font>
<tr valign=top>
<td><font size=1 color=#5f5f5f face="sans-serif">Sent by:</font>
<td><font size=1 face="sans-serif">"RE-wrenches" <re-wrenches-bounces@lists.re-wrenches.org></font></table>
<br>
<hr noshade>
<br>
<br>
<br><tt><font size=2>Hi James;<br>
<br>
So couldn't Larry weld in rigid conduit fittings? Aren't they NPSM,
or <br>
do I have that wrong? I suppose the Zinc plating would make a messier <br>
weld and possibly be poisonous....<br>
<br>
Also to Chris Mason, I was not aware that load banks were available for
<br>
rent. That sounds like a good option to consider. Do you have
a <br>
recommendation on who rents those?<br>
<br>
3rd response to Jarmo: do you have any pictures of the Li+ thermal
<br>
issues? Are we talking structure fire potential, or just destruction
of <br>
the batteries themselves?<br>
Is this another reason not to use plywood battery boxes?<br>
<br>
R.Ray Walters<br>
CTO, Solarray, Inc<br>
Nabcep Certified PV Installer,<br>
Licensed Master Electrician<br>
Solar Design Engineer<br>
303 505-8760<br>
<br>
<br>
> Note that water heater elements are NPSM (National Pipe Straight <br>
> Mechanical) and not NPT. So you need that type of half coupling or
<br>
> "bung" to weld in. The vegi-oil people seem to have this
sort of stuff <br>
> as they build water heater elements into things.<br>
><br>
><br>
<br>
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