On 27/09/17 14:58, Christopher Havel wrote: > Typing on phone, please excuse top post. > > Lithium ion cells are somewhat sedate, but cannot release as much current > at once as lithium polymer cells can. Lithium iron phosphate cells are > similarly sedare, but have capacities and discharge abilities more like > those of lithium polymer cells. arr didnt know about the quick and high current discharge of li-po vs li-ion. oh and thx for lifepo vs lipo too. thought lifepo could do high dischage but didnt know it was simular to lipo. oow i learnt some more :) thanks
> > Lithium polymer cells are the ones on YouTube that catch fire (or worse) at > slight provocation. They tend to (pick one) melt, catch fire, or explode > during recharge, if the parameters are at all even slightly off. > > Most phones also use lithium polymer cells, though - usually a single > flatpack in a case. These flatpacks need room to expand, whether in a case > or "non-removeable" inside the phone. What happened with the infamous > Galaxy Note 7 was that the designers did not pay attention to this > requirement. The batteries tried to expand, couldn't, and shorted out > internally as a result. Boom. Yea tried to leave/naturally left a little bit of room in my wooden battery box. hmm guess 1,2or3mm total for front and back and 1cm or so along one side with foam to pad/fill the gap. hmm didnt do any calculations for how much space to leave. kinda assumed that i had enough/ wasn’t trying to make it a tight fit but overall compact. using the bits of wood i had for a compact, strong box. its a 4S 20AH pack... http://hobbyking.co.uk/hobbyking/store/uh_viewitem.asp?idproduct=80904 you’ve got me reassessing my decisions... hope its ok... got a temperature alarm with sensor along the side. plus 2x cell voltage monitors/alarms. _______________________________________________ arm-netbook mailing list [email protected] http://lists.phcomp.co.uk/mailman/listinfo/arm-netbook Send large attachments to [email protected]
