Comment by avidiax
18 hours ago
If you believe Lumafield, 8% of low-quality lithium ion batteries have a mechanical defect that can sometimes lead to a short circuit.
Is this person really brave, or just unaware of the risks?
https://www.lumafield.com/article/finding-hidden-risks-in-th...
He put a fuse on every individual cell and on the overall unit, so I would say he was reasonably cautious (although he deployed a bunch of high-voltage exposed wires at the end of the video, but we can assume that was just a tech demo).
fuses only help for overcurrent scenarios. if they cell overdischarges due to a mechanical fault, or internally shorts, the fuses wont do anything. any then if it internally shorts at an SOC > like 20-30%, it'll vent and cascade into other cells.