Good question, I would assume these are not proprietary, since this is very site specific.
From here, there should be some guidance available in NFPA 855. If you find something better, please let me know.

www.nyserda.ny.gov/-/media/Proj...

Investigation points to insulation fault as root cause for the BlueSolution bus fires in France. Faulty insulation layer leading to inter cell short circuits.
Sounds a bit odd to me, that the insulation layer should be the root cause? Any other thoughts?
tinyurl.com/frenchbusfire

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I guess a general statement about Na-Ion. It also depends on which type of Na-ion they are talking about.
There are some nice roadmap outlooks (summarized and compared below by the Limiting Factor), but bringing this to the market is another challenge.