Hey there. I am new to the topic and I couldn’t find an answer on other topics related to BMS.
So, I bought brand new Samsung batteries and created a 8s2p pack. All batteries have same voltage individually and also when connected in parallel. Currently the pack has 28.1 volts since it hasnt been charged yet.
I wired a BMS on it starting with B- and P-. I connected also the balance wires to all the positive ends of the battery cells. When I check the voltage from negative wire to all the individual balance leads it is in line with the battery, total 28.1 volts.
However when I plug the balance flat cable into the BMS, it starts to heat up. When I measure the voltage on the P- lead it is showing 26.0 volts so it seams this is heating up the BMS.
Anybody struggled with a similar problem before?