Charging using CCCV with a buck converter

Question

Hi,

 

I am trying to charge with CCCV with a buck converter; however, the outputted SOC doesn't seem to completely resemble the voltage and current characteristics of the battery. What could be the issue in terms of that?

Answer 1

Hi the problem is in your control

you are working CC with 20A until 49.5V and the CV, the problem is that there is a current jump to 360A that cause a big voltage drop in the battery model (actually is the internal voltage drop is higher than the external voltage drop)

You should release the CC lately or correct the string battery parameters.