<html><body><div style="color:#000; background-color:#fff; font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:16px"><div dir="ltr" id="yui_3_16_0_1_1426701723119_6996"><font id="yui_3_16_0_1_1426701723119_7708"><span style="font-family: 'times new roman', 'new york', times, serif; font-size: 13px;" class="" id="yui_3_16_0_1_1426701723119_6997">We're leaning toward the LiFePO4 </span><span style="font-size: 13px;" class="" id="yui_3_16_0_1_1426701723119_10912"><font face="times new roman, new york, times, serif" id="yui_3_16_0_1_1426701723119_10911">batteries (low internal resistance) GBS have a medium high resistance so they warm faster and have a lower C rate efficiency, were gathering info as we go......</font></span></font></div><div></div><div id="yui_3_16_0_1_1426701723119_7000"><font face="times new roman, new york, times, serif"> </font></div><div class="signature" id="yui_3_16_0_1_1426701723119_6999"><div id="yui_3_16_0_1_1426701723119_6998"><span style="font-family:tahoma, new york, times, serif;" id="yui_3_16_0_1_1426701723119_7048">Max Balchowsky</span><br style="font-family:tahoma, new york, times, serif;"><span style="font-family:tahoma, new york, times, serif;" id="yui_3_16_0_1_1426701723119_7047">Design Engineer</span><br style="font-family:tahoma, new york, times, serif;"><span style="font-family:tahoma, new york, times, serif;" id="yui_3_16_0_1_1426701723119_7046">Golden Bridge Development</span><br style="font-family:tahoma, new york, times, serif;"><span style="font-family:tahoma, new york, times, serif;" id="yui_3_16_0_1_1426701723119_7368">1048 Irvine Ave Suite 217</span><br style="font-family:tahoma, new york, times, serif;"><span style="font-family:tahoma, new york, times, serif;" id="yui_3_16_0_1_1426701723119_7369">Newport Beach, Ca. 92660</span><br style="font-family:tahoma, new york, times, serif;"><span style="font-family:tahoma, new york, times, serif;" id="yui_3_16_0_1_1426701723119_7370">760-403-6810</span></div><div style="font-size:13px;font-family:tahoma, 'new york', times, serif;" id="yui_3_16_0_1_1426701723119_7041"><font size="1" id="yui_3_16_0_1_1426701723119_7743">"Building a Better Future For The Next Generation"</font><br></div></div><br> <div style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 16px;" id="yui_3_16_0_1_1426701723119_7044"> <div style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 16px;" id="yui_3_16_0_1_1426701723119_7043"> <div dir="ltr" id="yui_3_16_0_1_1426701723119_7042"> <hr size="1" id="yui_3_16_0_1_1426701723119_7045"> <font size="2" face="Arial" id="yui_3_16_0_1_1426701723119_7400"> <b><span style="font-weight:bold;">From:</span></b> Larry <larry@starlightsolar.com><br> <b><span style="font-weight: bold;">To:</span></b> RE-wrenches <re-wrenches@lists.re-wrenches.org> <br> <b><span style="font-weight: bold;">Sent:</span></b> Wednesday, March 18, 2015 8:57 AM<br> <b><span style="font-weight: bold;">Subject:</span></b> Re: [RE-wrenches] Load testing Lithium battery bank<br> </font> </div> <div class="y_msg_container" id="yui_3_16_0_1_1426701723119_7402"><br><div id="yiv2840987233"><div id="yui_3_16_0_1_1426701723119_7401">
Hi Jarmo,<br clear="none">
<br clear="none">
I agree and recognize your urgency in making us aware of the proper
use and charging of Li-ion batteries as well as the dangers of
mistreating them. As an early adopter myself, I am very cautious in
my approach even to the point of refusing to sell to some customers.
Lithium battery technology is in a state of rapid evolution. <br clear="none">
<br clear="none">
Not wanting to harp on the GBS brand that I sell, but one of your
points goes to prove the safety of their integrated approach. You
said, <font size="2" face="sans-serif" id="yui_3_16_0_1_1426701723119_7403">"...all it takes is
one poor connection or broken temp sensor on one cell." </font>The
GBS EMS system has cell level sensors for temperature (and other
data) and each sensor board requires constant communication with the
CPU. If the EMS fails to communicate any information with any cell,
the CPU immediately shuts down both safety solenoids, disconnecting
the battery. With the non integrated systems, failures that don't
report information to the management system could lead to disaster.<br clear="none">
<br clear="none">
Please keep offering us the knowledge you are gaining as I am a firm
believer that Lithium technology is a large part of the inevitable
replacement the aged lead battery.<br clear="none">
<pre class="yiv2840987233moz-signature">Larry Crutcher
Starlight Solar Power Systems
</pre>
<div class="qtdSeparateBR"><br><br></div><div class="yiv2840987233yqt0267703262" id="yiv2840987233yqtfd99940"><div class="yiv2840987233moz-cite-prefix">On 3/17/15 6:11 PM,
<a rel="nofollow" shape="rect" class="yiv2840987233moz-txt-link-abbreviated" ymailto="mailto:Jarmo.Venalainen@schneider-electric.com" target="_blank" href="mailto:Jarmo.Venalainen@schneider-electric.com">Jarmo.Venalainen@schneider-electric.com</a> wrote:<br clear="none">
</div>
<blockquote type="cite"><font size="2" face="sans-serif">Hi:</font>
<br clear="none">
<br clear="none">
<font size="2" face="sans-serif">I may sound like I'm a detractor
against
using Lion, but that's not it.</font>
<br clear="none">
<br clear="none">
<font size="2" face="sans-serif">What I want to bring to light is
that,
being as the technology is new, not all the issues are known and
there
are things to learn for all early adopters in the foreseeable
future.</font>
<br clear="none">
<br clear="none">
<font size="2" face="sans-serif">From what I can gather the
framework
for the issues lies in that Lion technology is based on
intercalation,
that is, a reversible insertion and removal of Li molecules into
compounds
with microscopically layered structures. This predicates that
there
must be no chemical reaction in the battery, but rather only the
shelving
of the highly reactive Li ions. If there are any chemical
reactions
taking place, then in the least the battery performance is
compromised
and in the most there is a thermal event or worse</font>
<br clear="none">
<br clear="none">
<font size="2" face="sans-serif">There are some very robust Lion
battery
packs, a favorite of mine being from a local company from
Vancouver, (well
Richmond, which is a suburb of Vancouver). It's a small
company,
but they have designed, developed, built and successfully
approved their
6 kWh Lion pack for use in large car ferries in Scandinavia.
The
ferries have stacks of these packs in the 100's, in the MWh
size. It
can be done.</font>
<br clear="none">
<br clear="none">
<font size="2" face="sans-serif">What I'm advocating is that its
best
to work with companies that have the time, interest and
resources to work
through the wrinkles, and if not, then carefully put in reliable
and precise
BMS circuitry which includes things like fail safe circuits for
single
point failures of critical sensing circuits, the foremost of
which is cell
temperature. When you're pushing large currents, all it takes
is
one poor connection or broken temp sensor on one cell......</font>
<br clear="none">
<br clear="none">
<font size="2" face="sans-serif">Here's a link to the Lion battery
pack
manufacturer, Corvus,</font>
<br clear="none">
<br clear="none">
<a rel="nofollow" shape="rect" target="_blank" href="http://corvus-energy.com/"><font size="2" color="blue" face="sans-serif">http://corvus-energy.com/</font></a>
<br clear="none">
<br clear="none">
<font size="2" face="sans-serif">I know they do a good job, but
they're
not cheap,.... for now...</font>
<br clear="none">
<br clear="none">
<font size="2" face="sans-serif">JARMO</font>
<br clear="none">
<font size="3"><br clear="none">
</font><font size="1" face="Arial"><b><br clear="none">
Jarmo Venalainen</b> | </font><font size="1" color="#008000" face="Arial"><b>
Schneider Electric </b></font><font size="1" face="Arial"><b>
| Xantrex
Brand</b> | <b>CANADA</b> | <b>Sales Application
Engineer</b> <b><br clear="none">
Phone:</b> +604-422-2528 | <b>Tech Support:</b>
800-670-0707
| <b>Mobile:</b> +604-505-0291 <b><br clear="none">
Email:</b> </font><a rel="nofollow" shape="rect" ymailto="mailto:jarmo.venalainen@schneider-electric.com" target="_blank" href="mailto:jarmo.venalainen@schneider-electric.com"><font size="1" color="blue" face="Arial"><u>jarmo.venalainen@schneider-electric.com</u></font></a><font size="1" face="Arial">
| <b>Site:</b></font><a rel="nofollow" shape="rect" target="_blank" href="http://www.xantrex.com/"><font size="1" color="blue" face="Arial"><u>
www.Xantrex.com</u></font></a><font size="1" face="Arial">
|
<b>Address:</b> 3700 Gilmore Way, Burnaby, BC V5G4M1 <br clear="none">
</font>
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<font size="3"><br clear="none">
</font>
<br clear="none">
<br clear="none">
<br clear="none">
</blockquote>
<blockquote type="cite">
<table><tbody><tr><td colspan="3" rowspan="1"><br clear="none">
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</blockquote>
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