Dead BMS! How to test it? & what's inside my 52V battery pack?

The battery from my ebike (BBSHD set) had been replaced by the seller, as the previous one had the BMS dead. After the third or fourth charge, this one died as well.
This is 14s5p 52V battery pack, that I am going to crack open and try to test if this is the BMS problem or not. I will also explain the basic principles behind the construction of this battery.

Thanks for watching!

Видео Dead BMS! How to test it? & what's inside my 52V battery pack? канала VRMinde