[jonesjohnson]

Proper cooling seems to be the primary thing to do.

https://www.sciencedirect.com/science/article/pii/S259017452...

Proper Home Storage systems are pretty safe:

https://www.bves.de/en/2024/12/17/study-home-batteries-fire-...

There are special containers for transport of (even damaged) lithium batteries, which don't look overly bulky:

https://www.zarges.com/en/solutions/transport-and-storage-of...