bobbill said:
the notion that in a balance need, the cells in B simply balanced themselves, (high cells rushing current to bring low cells to match--to a point,whereon, the BMS acts to shut or continue). Which is also why I set the modules without BMS first and kept the like charged cells to groups.
I missed something...again.
Putting all your cells in parallel at 1S voltage for say 3-4 days, does indeed do that, but only possible before the pack is assembled
and make sure they are all within 0.1V delta before you start. The goal is to get each within say 0.01V aka 10mV.
Read that again carefully, and make sure you understand every part of it before moving on, or ask specific questions
I think that is what you are missing in your learning process, thinking you have understood before you actually do.
For example, "at 1S voltage" give me the numeric range you will read off your DMM of that group, containing maybe hundreds of cells.
In that configuration, there is no BMS involved, nothing a BMS could do.
. . .
Once you have cell / groups wired into a series string, say 10S, then no current ever flows between them, without the help of a circuit designed to do balancing.
If that is (part of) a very cheap BMS, the balancing current rate will be very slow, it only works with current flowing after the charge cycle was complete
and most likely the BMS has no way of telling you balancing is complete (delta under say 0.03V 30 mV), the process may literally take days
much less giving you the actual voltages of each cell / group.