I have 16 Lishen 272ah cells set up in (2) 8s 24v batteries. Overkill Solar BMS. I have completed top balancing on both packs (first in series and then finished each cell at 3.65V). I am now running capacity test at around .2C.
My first pack came in right at 272ah before I shut it down when lowest cell was 2.65.
Now I am doing my second pack and here is the screenshot. Looks like issue with #7. I did top balance yesterday and let them sit overnight. When I measured voltage before capacity test, every cell except #7 was right around 3.4. #7 was around 3.3. I figured I must have messed up #7 somehow and put it on the charger - it reached 3.65 and 1 amp in about 30 minutes. I let it sit for about 30 minutes and then started the capacity test. Not sure what to look for at this point...any help appreciated...
My first pack came in right at 272ah before I shut it down when lowest cell was 2.65.
Now I am doing my second pack and here is the screenshot. Looks like issue with #7. I did top balance yesterday and let them sit overnight. When I measured voltage before capacity test, every cell except #7 was right around 3.4. #7 was around 3.3. I figured I must have messed up #7 somehow and put it on the charger - it reached 3.65 and 1 amp in about 30 minutes. I let it sit for about 30 minutes and then started the capacity test. Not sure what to look for at this point...any help appreciated...
