Wrandyr
since your purpose /as you write above/
is to use this battB board with power tool battery packs, right?
so I am going to write only about this.
what power tools packs, what configuration, how many packs???
please
consider that every tool pack has his own electronics which monitor cells voltages, temp, LVC, HVC, etc.
now you want to use batB board to this power tool packs cells?
paraller to power tool pack electronics?
to me
you should have either factory power pack electronics OR
EPLUS battB electronics, no two at the same time.