LiFePO4 Battery Autopsy/Teardown

An teardown/autopsy of a couple of failed LiFePO4 Battery cells. The home-made battery pack for my ebike developed a bulge so I decided to take it apart and see what had happened inside it. One of the cells inside had balooned up and it’s next door neighbour was slightly swollen too. When the battery on my mobile ’died’ recently I was slightly curious as to why it still worked, but with limited capacity. I wanted to know what had happened inside the failed LiFePO4 cells and decided to do a pull them apart a