Have 4 200ah lifepo4 cells with the overkill BMS.
I top balanced the cells, then discharged down to 0%. Got approx 205ah out of the pack, so that looks good, but I had noticed that when I charged back up to 100% it never got to 14.4v,, and a cell would hit overvoltage and shut down the charger before it got there.
I left it for about a week and it settled down to a variance of approx 0.014.
Hit it with a quick charge today and it did the same thing. The variance spikes as soon as I put the charger on it, then one cell gets to 3.65 and shuts down the charger before the entire pack gets to 14.4.
This isn't ideal as I was hoping to leave the pack on the charger when I'm not using it and not be constantly plugging/unplugging the charger, or have it constantly stuck in the cycle of tripping the overvoltage and shutting off.
Am I doing something wrong?
I top balanced the cells, then discharged down to 0%. Got approx 205ah out of the pack, so that looks good, but I had noticed that when I charged back up to 100% it never got to 14.4v,, and a cell would hit overvoltage and shut down the charger before it got there.
I left it for about a week and it settled down to a variance of approx 0.014.
Hit it with a quick charge today and it did the same thing. The variance spikes as soon as I put the charger on it, then one cell gets to 3.65 and shuts down the charger before the entire pack gets to 14.4.
This isn't ideal as I was hoping to leave the pack on the charger when I'm not using it and not be constantly plugging/unplugging the charger, or have it constantly stuck in the cycle of tripping the overvoltage and shutting off.
Am I doing something wrong?
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