Is this LiFePO4 and what is the configuration XsYp? With so little information provided, it is difficult to figure what the issues may be. The boards between terminals can be balancing boards, if this is a 10s, then there should be 10 of them (not 9).
What is a "hybrid scooter"? Does it also have a gas engine? Did you say that you removed the chips on the PCB? Why would you do that? Or is that an inaccurate description? Is the blinking LED on the BMS inside the pack, or is it controlled by the ECU?
I would think that the BMS is not getting the right signals from the balancers - due to a disconnect or a bad board, it cannot see the voltage across a cell, or some other issue with one of the 10 balancers. Looks like you already are suspecting a balancer and testing it, and there may be signs of fire damage on it?
What is a "hybrid scooter"? Does it also have a gas engine? Did you say that you removed the chips on the PCB? Why would you do that? Or is that an inaccurate description? Is the blinking LED on the BMS inside the pack, or is it controlled by the ECU?
I would think that the BMS is not getting the right signals from the balancers - due to a disconnect or a bad board, it cannot see the voltage across a cell, or some other issue with one of the 10 balancers. Looks like you already are suspecting a balancer and testing it, and there may be signs of fire damage on it?