Quote:
Originally Posted by JThiessen
So is a damaged lipo considered as stable as an undamaged one? Not arguing, just wanting to know.
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Honestly if the cell is not puffed it has not undergone the chemical reaction that produces the gas that may makes the cell casing puff/pop. As far as lipo fires go, the internal anode and cathode must touch, or arc in some way to get the litium to ignite via extreme heat. I have had cells puff from overdischarge, and seen what happens when you over charge one (hooked a 12v car battery to a 1 cell lipo with jumper cables in the yard, it made a pop noise and smoked a bit).
As far as shipping goes, as long as the pack is not puffed, and does not have any method of shorting the tabs it should be just as safe as a new lipo. That means that if you stick a screwdriver (or something sharp) thru either it will produce the same result (some smoke and heat). I have had torn case cells hanging around for months, all they do is smell a bit sweet (must be the paste inside) and take up space. I have read may different ways to dispose of lipos, and the vast majority just say to snip off the tabs and toss them in the garbage.
I have thrown them on the ground, stabbed then, run over them with a truck (f250) and never got anything until I hooked up the car battery. I have had worse smoke and heat from nimhs going bad....