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Battery Pack Modeling

I'd like to know if the model of a cell that consists on a VOCV + Ro + branches RC could be usefull also for a battery pack (NOT A SINGLE CELL). I mean, will the whole system perform as the typical electrical model of a single cell shown in most documents such as the following ones?
If it isn't the same, could anyone tell me how do I estimate the SOC for the whole battery pack?
Thank you,

Now is correct
[edited by: Jordi_00 at 4:50 AM (GMT -4) on 25 Aug 2021]