when I read the BMS without cells aplying power I can read it. If I connect cells, it can not read anything.
Looks like the chip is in cyclic reset loop.
Did the battery arrive in this state or it happened after reapair attempt?
@torture when I received the battery cells were under 1 volt, but I could read the bms . After recelling I can not read it, but if I disolder cells, I can read it again (0 volts as in screeshot)
if I disolder cells, I can read it again (0 volts as in screeshot
Post a screenshot to check parameters without cells connected.
@torture the screenshot I have posted above is without cells
Chip is faulthy.
The solution is to be replaced and flashed with dump from same working battery.
I have experienced same troubleshoot before, with the same SIMPLO SQU-1002 battery with same chip, I post two PCB I have also without cells.
@torture something strange in all these batteries is that FCC is still 4400 in spite cycle count is high
So it's definitely a common problem in this battery model.
Check reported temperature from all 3 PCB's it's exactly 28.85c, battery volatge = design voltage 11100mv, FCC = Design Capacity 4400mAh.
All 3 chips are faulthy.
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