Dimas,
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.
Best,
David
Dimas Firmanda Al Riza wrote:
Dear David and Maria,
I'm also doing simulation that required different type of battery from
the existing battery type available in TRNSYS library,
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?
David, I'd like to read the paper you've offered to maria, would you
send me also?
Thank you very much
-dimas-
ME Student
UTP
On Sat, Mar 13, 2010 at 12:18 AM, David
Bradley <bradley@tess-inc.com>
wrote:
Maria,
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.
Best,
David
Maria Victoria Cambronero Vazquez wrote:
Hi,
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).
Thank you
very much!
Maria
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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
E-mail: bradley@tess-inc.com
Web Pages: http://www.tess-inc.com and http://www.trnsys.com
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