BarracudaBob
Harvesting free photons from clean fusion
I didn't make any changes to the parameters but that may be an option in the future after 10 cycles. I am open to any suggestions.The screenshot does not allow me to see all cell voltages. If one or more cells is above 3.45 volts then I should see "Bal" next to the cell voltage. If I blow up the picture it does appear (Although with my old eyes I can't be sure) that some cells might have "Bal" which is good. Hold the charge voltage between 55.2 and 56.0 volts to ensure that one or more cells does not reach 3.6 volts which is Cell Overvoltage Protection. If a cell reaches OVP then the BMS will stop the charge preventing other cells from balancing. Hold it there for a couple of hours and let the battery "soak". The juice (electrolyte) in the cells will become happy happy and hopefully all will be well. You might have to from time to time (hopefully not that often) do this but with all batteries in your bank. Balancing the cells in one battery is not the same as balancing all batteries together. I have one in a rack of six that always discharges first and also charges first. Not necessarily a "bad" battery, just a different batch and I might from time to time have to tweak the charge profile to accommodate this battery
I used 100mA to charge low cells to 3.53 and a 10W 8 ohm resistor to discharge ones in over voltage warning. It is now sitting at 56.3 (on Chargeverter) resting peacefully.
Short recap over the last week it sat on the chargerverter being walked up from 54 to 55.4 and would go into alarm. No matter how long it sat with zero to 100 mA it wouldn't balance. The BMS starts to balance any cell over 3.535 for over a second. The low ones never came up. I waisted a two weekends over a new and 1 year old battery (2 of 6).
I greatly appreciate all the suggesting and help. Nothing was ignored. My wife and I were at the point that if this isn't corrected soo we would be looking for alternative storage device.
30+ years in electronics this was going to end NOW and it did. The gremlins have been put back in the cage.
Issue Resolved.
![1717368041331.png 1717368041331.png](https://diysolarforum.com/data/attachments/219/219274-b78a19947f4dfe95337135d9ab38f3a0.jpg)
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