[TRNSYS-users] batteries models

[David Bradley]

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 at tess-inc.com 
> <mailto:bradley at 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 at tess-inc.com <mailto:bradley at tess-inc.com> 
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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 at tess-inc.com 
Web Pages:  http://www.tess-inc.com    and      http://www.trnsys.com

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