[TRNSYS-users] Questions on Type 47 and Li-Ion Batteries

[David BRADLEY]

Sylvain,
   Could you please send your project files so that we can have a look 
at them?  To the best of my knowledge, there is still no Li-ion battery 
model for TRNSYS.
Thanks,
  David


On 8/10/2012 09:53, sylvain.hippolyte at external.gdfsuez.com wrote:
>
> Hello everyone,
>
> I have a couple questions regarding batteries in TRNSYS 17.
>
> 1.I have been trying to use a battery (type 47c) combined with a 
> regulator/inverter (type 48b). The input and load powers are read from 
> external files.
>
> When I increase the number of cells in parallel or in series while 
> keeping the same cell energy capacity (in Ah), the amount of energy 
> storable in the battery (energy stored in the battery when it reaches 
> 100% SOC) does not change, and is way above the rated energy capacity 
> (that I consider equal to C = Cell Energy Capacity x Cells in parallel 
> x Cells in series x Voltage, expressed in Ah).
>
> However, when I change the values of the max charge and discharge 
> currents, it changes the amount energy storable in the battery, which 
> I don't understand either.
>
> Moreover, if the battery is fully charged and starts discharging, the 
> fractional state of charge of the battery increases above 1, instead 
> of decreasing as it should be the case.
>
> Could someone give me some insights on what I am missing here?
>
> 2.I was also wondering if a Li-ion module had been developed for 
> TRNSYS. I have seen previous messages saying that none existed, is it 
> still the case?
>
> Thank you in advance for your help.
>
> Best regards,
>
> Sylvain Hippolyte
>
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>
>
>
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-- 
***************************
David BRADLEY
Principal
Thermal Energy Systems Specialists, LLC
22 North Carroll Street - suite 370
Madison, WI  53703 USA

P:+1.608.274.2577
F:+1.608.278.1475
d.bradley at tess-inc.com

http://www.tess-inc.com
http://www.trnsys.com

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