I've got a 280ah cell with some weird behavior.
- When charging, it's voltage leads the other cells. I have absorb set to ~56.1 and balancing set at 3.51v. It reaches this before the other cells which do range with lowest at ~3.46v at that point.
- When it hits the absorb/balancing voltage area, it's voltage drops to ~3.44v while the others balance out at 3.51v. I don't know exactly when this happens. I don't know if the balancer triggers this exaclty when it comes on. The voltage will not rise even with extended absorb.
- After charge all the cells settle to normal voltages
- When discharging, the cell's voltage is the same as all the other cells.
I've taken the busbars off, cleaned, etc and reinstalled. I've also tested with a voltmeter on the posts and it jives with what the BMS says.
The bank is 3 yrs old. In the past, that cell sometimes lagged a bit when charging, but would balance out with the rest of the pack.
Anybody seen something like this?
- When charging, it's voltage leads the other cells. I have absorb set to ~56.1 and balancing set at 3.51v. It reaches this before the other cells which do range with lowest at ~3.46v at that point.
- When it hits the absorb/balancing voltage area, it's voltage drops to ~3.44v while the others balance out at 3.51v. I don't know exactly when this happens. I don't know if the balancer triggers this exaclty when it comes on. The voltage will not rise even with extended absorb.
- After charge all the cells settle to normal voltages
- When discharging, the cell's voltage is the same as all the other cells.
I've taken the busbars off, cleaned, etc and reinstalled. I've also tested with a voltmeter on the posts and it jives with what the BMS says.
The bank is 3 yrs old. In the past, that cell sometimes lagged a bit when charging, but would balance out with the rest of the pack.
Anybody seen something like this?