GPCCHEM: GPCCHEM Tool not working

I have received this result, which is above 3% deviation. 

    Best chemical ID : 2144 Best chemical ID max. deviation, % : 3.91

Is it still usable ?

Thank you.

Patrick

Hello Patrick,

That error is kinda high. What chemistry of battery are you using?

Regards,

Adrian

Hi Adrian,

We are using a 3S2P Lithium-ion battery pack from a manufacturer in China.

Patrick

Hello Patrick,

Can you share the datasheet for the battery you are using? I want to verify that the gpcchem tool was completed according to our specs.

Regards,

Adrian

Hello Adrian,

Of course, here is the datasheet

《EVE INR18650-35V Spec》PBRI-INR 18650 35V-D06-15-A-2023.03(1).pdf

Thanks,
Patrick

Hello Patrick,

The only discrepancy I see is that for the discharge the voltage gets down to 8139mV. For your battery pack the terminate voltage is 7500mV. I would reattempt the learning cycle but this time try to discharge down closer to 7500mV.

Regards,

Adrian

Hello Adrian,

Yes indeed it is normal, I set the cut off to 8.2V because BMS of the battery pack cuts around 8V.

I did not discharge the battery to 7.5V because of that.

However, I bought single cells for testing. Should I build a 3S or 3S2P pack without BMS to perform the optimization cycle?

Thanks,
Patrick

Hello Patrick,

Yes, it is ideal to perform the GPCCHEM tool process with bare battery cells. You should do the test with 1S cell configuration.

Regards,

Adrian