Yes, same profile but won’t read the BMS. I tried,
Sorry
Btw my max/min cells exactly equal again/still.
Thank you so much for being so responsive and helpful. If we can't get the BMS software version number to compare, there is no point for me upgrading to the pro version of the app. In that case I just assume my OVMS gives me all there is to see.
Regarding cell voltages: even my unbalanced pack will show a similar minimal discrepancy between cells when the pack is somewhere in the middle of the SOC range (say between 10 and 90%). The only reason I still see any difference at all is that I get an extra digit (3 decimals), while the app only shows you 2 digits. You would not see a 3mV difference, it gets rounded to the save value.
The reason that we have those tiny differences is that LFP cells have an extremely flat voltage curve. The real difference only becomes apparent right at both ends. I don't want to go down to 0%, so I am looking at 100%.
The very first screenshot you posted, where you had 99.9% SOC was 3.35V. The one just now, 77% SOC shows 3.32V. You had another one, 72% SOC, also 3.32V. The difference is very small, and most of that voltage drop will happen in the first 1% of discharging, when what is called 'surface charge' is used.
I would be curious to see where your voltage difference goes to right at the end of a charge to 100%, just before the car stops charging. I would assume that the highest cell goes to 3.65V, just like it does for me. The question is where the lowest cell is at that time.
Mine is around 3.37V at that time, which is much too low for my liking. Anything over 3.45V for the lowest cell, I'd be happy with. By my estimation that difference is enough to hide 10% of the cell capacity, which might go unused in my battery pack.
