I put the board on charge while finishing off the last pieces of the board. Thought it took long to charge and charger light never Went green. So I disconnect the charger and measure voltage from charge plug on the skateboard and it shows 44.5v. The bms is supposed to cut off after 42v and the charger supply 43.5 volt if measure it.
I used this setup last summer, same charger and same batterypack&bms and only thing and never noticed any problem.
I also dissembled the pack and measured from XT90 and was still to high. Im not sure but felt like voltage dropped abit over time. Went out and took a tour on the board and now the voltage is down to 40v again.
Your charger shouldn’t charge over 42V in general. So even if your bms isn’t working the overall voltage of your battery shouldn’t exceed 42v as the charger would switch off by his own.
Slight correction, missread the voltage, charger supply 42.3.
I dont have a link but its a 2A 10s charger that say it supply 42.3 so thats correct.
Its an ebike charger for li-ion 10s4p package. using samsung cells.
I just measured the voltage on bms after draining battery abit - None of the paralells differ any in voltage.