Originally Posted by
Doc_Wui
Grin Techbology's take on ebike fires and UL testing, March 13, 2024,
https://www.youtube.com/watch?v=j92Gt4VviSQ&t=2453s
The first part is the history , but you can skip to around the 30 minute mark. The takeaway is they could not get a modern battery with brand name cells to catch on fire, He believes it's low quality cells, not user abuse, to be the root cause of spontaneous fires.
UL testing won't catch low quality,
False.
A prerequisite for UL certified battery pack is to use certified cells. (IEC 62133) Part of the cell certification is testing for abnormal conditions; making sure the cells vent properly rather than explode.
Part of the battery pack certification is to require adequate ventilation or to test the pressure handling ability of the pack.
The reason the modern cell from a brand name would not catch fire is because they're certified and they have to pass the tests to get certified.
More info can be found in this thread:
https://www.bikeforums.net/electric-...fications.html