I have an 2S/2P 18650 configuration for general purpose power usage on my desk. I have an Lipo charger i can use, but i want the battery pack to hav it's own BMS for safety regards to over/under voltage protection and balancing.
Here is my BMS connected to the battery:
B+ to battery positive (8.4V)
B- to battery minus
BM between battery 1 and 2
My question is:
Does this board also balance the batteries?
Normally they sense the voltage across each cell and introduce a load resistor across any
cell that is fully or over-charged to balance the cells. If the whole pack is over or under
voltage a MOSFET switches off the charging current completely.
As yours appears not to have load resistors it may balance by a different technique, or
not balance at all but just detect imbalance for shutdown.