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Dimas,<br>
I am not sure that changing the cell voltage is valid. I think that
the Shepherd model assumes a certain shape to the battery's charge /
discharge curve that is inherent to lead acid batteries and not as
valid to other battery types. Someone please correct me if I am wrong
about that.<br>
Best,<br>
David<br>
<br>
<br>
Dimas Firmanda Al Riza wrote:
<blockquote
cite="mid:fc78d31003120850p35f30ac5oe405412bf93deffa@mail.gmail.com"
type="cite">Dear David and Maria,<br>
<br>
I'm also doing simulation that required different type of battery from
the existing battery type available in TRNSYS library,<br>
I need to simulate 12V battery bank, that consist of 4 @12V 100Ah
battery. Type 47b in TRNSYS library have a default voltage value of
2,5V each cell, Can I simply change this value? or do I need to make
some other modification for this component? <br>
David, I'd like to read the paper you've offered to maria, would you
send me also?<br>
<br>
Thank you very much<br>
<br>
-dimas-<br>
ME Student<br>
UTP<br>
<br>
<div class="gmail_quote">On Sat, Mar 13, 2010 at 12:18 AM, David
Bradley <span dir="ltr"><<a moz-do-not-send="true"
href="mailto:bradley@tess-inc.com">bradley@tess-inc.com</a>></span>
wrote:<br>
<blockquote class="gmail_quote"
style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
<div bgcolor="#ffffff" text="#000000">
Maria,<br>
You are correct that the battery models in TRNSYS are for lead-acid
cells. I was directed to a paper some years ago that suggested a method
for modeling lithium-ion batteries. The method comes down to curve
fitting the data that you get from a manufacturer's catalog into a few
polynomials. I had a hard time following the some parts of the paper
and never got a chance to implement the model but it seemed to me as
though the method could be extended to other battery types. I'll
forward you the paper in a separate email. If anyone else has seen some
modeling research in this area, I'd be quite interested in hearing
about it to improve on the existing battery models.<br>
Best,<br>
David
<div>
<div class="h5"><br>
<br>
<br>
Maria Victoria Cambronero Vazquez wrote:
</div>
</div>
<blockquote type="cite">
<div>
<div class="h5">
<div>
<p class="MsoNormal"><font face="Arial" size="2"><span
style="font-size: 10pt; font-family: Arial;">Hi,</span></font></p>
<p class="MsoNormal"><font face="Arial" size="2"><span
style="font-size: 10pt; font-family: Arial;"> </span></font></p>
<p class="MsoNormal"><font face="Arial" size="2"><span
style="font-size: 10pt; font-family: Arial;" lang="EN-GB">I´d need to
know if there is a model of Li-Ion
Battery or if I´m able to characterize any kind of battery using an
existing
type (in spite of being lead-acid battery).</span></font></p>
<p class="MsoNormal"><font face="Arial" size="2"><span
style="font-size: 10pt; font-family: Arial;" lang="EN-GB">Thank you
very much!</span></font></p>
<p class="MsoNormal"><font face="Arial" size="2"><span
style="font-size: 10pt; font-family: Arial;" lang="EN-GB">Maria</span></font></p>
</div>
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***********************************************************************
Thermal Energy System Specialists (TESS), LLC
David BRADLEY 22 N. Carroll Street - Suite 370
Partner Madison, WI 53703
USA
P: +1.608.274.2577
F: +1.608.278.1475
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