Quote:
Originally Posted by SlowOne
Yup, don't want to be in a room when that goes off!! Note the vents, and imagine what might happen if your cells are in a sealed metal box...
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If that's a concern: poke two holes in the sealed metal box and seal the holes with something that melts or burns away in contact with smoke or heat (Polystyrene/PS, Silicon Sealant, Polycaprolactone/PCL (thermoplastic that melts around 60 degrees, so it's easy to apply/seal). That way smoke can escape instead of pressure building up.
To be honest though, I think the seals of an ammo box will not hold off overpressures a burning LiPo pack might create when burning. It would need testing, and I would say to prevent any risks, it would be best to make a it possible to open the box remotely (you never know what happens when a fresh air supply enters the equation).
As for someone's question about flame-retardant insulation: When a battery goes, they'll all go - I'd say it's only to prevent electrical conductivity with the box itself. Any insulation (no matter how flammable) will not add much to the intensity of the fire I'd say
