The question here is should I leave the converter charger in the Lithium constant 14.6 volt mode (and re top balance the cells), or use the normal mode (14.4V/13.6V/13/2V) where this problem doesn't happen; or something else.
I built and added the 280 AH EVE battery to my trailer. I moved the jumper on the four stage converter charger to the Lithium setting which turns it into a single stage 14.6 V charger. When plugged in to shore power, one cell jumps the 3.65 V level before the battery hits 14.6 Volts and the BMS shuts down the charging port and stays off line until the voltage goes below 14.0 volts as per the BMS design. I've read you should not rely on the BMS to shut down charging, but it should only be a last resort. The delta for the rogue cell is .02 V at the top now; all cells run a delta of less than .005 under load.
The charger port shut off doesn't happen on the solar charge set up as that is set to 14.4 volts. The DCDC charger is set to 14.4 volts too. In its normal mode, the Converter Charger has a 14.4 V boost charge, a 13.6 V normal charge and 13.2 V float. The boost cycle was supposed to go for 4 hours, but I'm not sure it lasts that long.
We don't usually dry camp for more than a week and solar keeps us at the top when we need it; and I can always turn on the car for a while and use the DC DC charger set up if i want to get near the top. When plugged in to shore power, the battery need is zero. So, it seems using the regular charging profile is a better choice than using the 14.6 constant charge and relying on the BMS disconnect the charging port when we hit the top. Thoughts?
I built and added the 280 AH EVE battery to my trailer. I moved the jumper on the four stage converter charger to the Lithium setting which turns it into a single stage 14.6 V charger. When plugged in to shore power, one cell jumps the 3.65 V level before the battery hits 14.6 Volts and the BMS shuts down the charging port and stays off line until the voltage goes below 14.0 volts as per the BMS design. I've read you should not rely on the BMS to shut down charging, but it should only be a last resort. The delta for the rogue cell is .02 V at the top now; all cells run a delta of less than .005 under load.
The charger port shut off doesn't happen on the solar charge set up as that is set to 14.4 volts. The DCDC charger is set to 14.4 volts too. In its normal mode, the Converter Charger has a 14.4 V boost charge, a 13.6 V normal charge and 13.2 V float. The boost cycle was supposed to go for 4 hours, but I'm not sure it lasts that long.
We don't usually dry camp for more than a week and solar keeps us at the top when we need it; and I can always turn on the car for a while and use the DC DC charger set up if i want to get near the top. When plugged in to shore power, the battery need is zero. So, it seems using the regular charging profile is a better choice than using the 14.6 constant charge and relying on the BMS disconnect the charging port when we hit the top. Thoughts?
