jonyjoe303 wrote: ↑
Dec 11, 2017 10:26 pm
yes very possible to overcharge especially if the pack is out of balance. If one row of cells reads higher than the rest and your monitoring for overall voltage, the overall voltage can be below the max, though one row of cells are already past there max voltage.
A multimeter will only tell you overall voltage unless you check each row of batteries.
It looks like the bms on you battery pack is no longer good. I would not try to charge it with it, it might not be monitoring the batteries balance status anymore.
If you have balance connectors use 1 or 2 of these to measure each row of cells.
The balance connector will be a string of 14. The device you suggest would mean rewiring.
Most BMS these days will not allow overcharge, but all bets are off with a bad BMS.
I'd look to a new BMS, especially if the problems started just after the drenching. Upgrade to a BMS capable balancing. Pay attention to new BMS size to ensure a good physical fit.
Learn to solder if you are going to repair. A skill every builder will eventually need.