Phone again, sorry again... 10% of battery height is your minimum space. On Sep 27, 2017 10:42 AM, "Alexander Ross" <[email protected]> wrote:
> 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] _______________________________________________ arm-netbook mailing list [email protected] http://lists.phcomp.co.uk/mailman/listinfo/arm-netbook Send large attachments to [email protected]
