So After todays ride I opened up the enclosure to monitor my cells before charging them up to full charge again. All cells read 3,47 volts measured on the BMS balance wire connector. To be able to measure the first group of cells without stripping the battery I put the negative probe on the charge port -.
I charged the battery up to 42 and re-measured the cells.
First group of cells read 3,89 v. All the others were at 4,20-4,22
Faulty cells? Time to buy new cells? Disassemble battery? Lots of work? Fire?
So, I started searching the forum and read everything I could. To no good, cells were still at 3,89. Time to strip the battery. Shrink wrap, foam, fish paper, kapton…
Inspected nickel welds. Rock solid. Checked soldered balance wires. No problem.
So, then I measured that first group of cells again. Probe directly on nickel this time. duh
Phew!! Funny thing is that all parallel groups showed the same exact voltage pre-charging while measuring at the same spots - charge port and balancing connector, but post charging (while BMS was in balancing mode I guess) measuring through charge port gave a lower voltage reading on that first group of cells.