Yesterday I took all my 45 CALB cells out of the car to balance them.
I drove them for ~30km/19miles so they were not fully charged, estimated at 60%.
Wired all parallel and let them rest a while
Connected a small power suply unit at 3,5V and let some current flow (~3A) for a while.
Got of the cables and measured the same voltage at every cell.
I thought, everything works fine.
Wired all together in series and connected the charger with 157,5V.
Today I measured the voltages again, after charging over night:
3,3V to 4,6V(!!!!) at a single cell ... fu§k!!!
Something went terribly wrong and I don't know what!?!
I will drain every single battery to a fixed point by hand now ... this will take a while and after that, I hope the cells are fine.
Saturday there is the "1st northeuropean e-rallye" and I signed and want to start ... fingers crossed
I drove them for ~30km/19miles so they were not fully charged, estimated at 60%.
Wired all parallel and let them rest a while
Connected a small power suply unit at 3,5V and let some current flow (~3A) for a while.
Got of the cables and measured the same voltage at every cell.
I thought, everything works fine.
Wired all together in series and connected the charger with 157,5V.
Today I measured the voltages again, after charging over night:
3,3V to 4,6V(!!!!) at a single cell ... fu§k!!!
Something went terribly wrong and I don't know what!?!
I will drain every single battery to a fixed point by hand now ... this will take a while and after that, I hope the cells are fine.
Saturday there is the "1st northeuropean e-rallye" and I signed and want to start ... fingers crossed