How to include charging characteristics in the following battery cell model?

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1

Hi,

I am trying to model a battery cell to allow charging and discharging using buck boost converter; however, this model only includes discharge characteristic; I am wondering how is it possible the include charging characteristics. I do have the datasheet of the battery cell.

Kind regards

plecs_lithium_ion (27).pdf (421 KB)

Lithium_ion_constant_T.plecs (24.3 KB)

CGR18650CG_data.mat (818 Bytes)

2

Hello,

Did you also see this application note: https://www.plexim.com/content/electrical-equivalent-implementation-lithium-ion-batteries ?

Thanks,

Kris

3

Yes, but I am unsure how to apply discharging to the battery model. Any ideas?

4

Hello,

I would think you need to implement logic to drive a Controlled Current Source to draw down power from the source (which at least during discharging cannot be represented by a stiff ideal voltage source, but rather a capacitor only). Does that make sense?

Regards,

Kris