Posted this earlier but I figured I’d give it its own topic to get the proper help.
So I decided to upgrade to 30q to combat voltage sag. I just switched the cells and re-wired the bms. When I first plugged the battery into the speed controller it came on and ran fine. Now this morning after charging the cells, when turning the board on , the esc beeps to show power then the whole board shuts off. The only thing different from when I tested last night is I crammed the battery case cover back on. The only thing I could think of happening was some sort of solder joint inside the battery broke when I stuck the case cover back on. The weird thing is my multimeter still shows 37 V so if the battery was messed up why is it still showing voltage? If the esc was messed up why would it start up then shut back off?