From Wikipedia:
Chemistry, performance, cost and safety characteristics vary across LIB types. Handheld electronics mostly use lithium polymer batteries (with a polymer gel as electrolyte) with lithium cobalt oxide (LiCoO
2) as cathode material, which offers high energy density, but presents safety risks,[16] especially when damaged. Lithium iron phosphate (LiFePO
4), lithium ion manganese oxide battery (LiMn
2O
4, Li
2MnO
3, or LMO), and lithium nickel manganese cobalt oxide (LiNiMnCoO
2 or NMC) offer lower energy density but longer lives and less likelihood of fire or explosion. Such batteries are widely used for electric tools, medical equipment, and other roles. NMC and its derivatives are widely used in electric vehicles.
bp
<part15sbs{at}gmail{dot}com>
BMS is everything for lithium charging safety... I built a charging station for charging cells using ceramic tiles.. They get extremely hot if they burn.
On 6/6/20 7:15 PM, Bill Prince wrote:
There has to be at least a dozen different "flavors" of lithium batteries at this point. All kinds of different chemistries.
bp <part15sbs{at}gmail{dot}com>On 6/6/2020 5:37 PM, ch...@wbmfg.com wrote:
Isn’t everything lithium these days?Never ever ever charge lithium batteries unattended. Build yourself a box out of cinder blocks for future charging.On Sat, Jun 6, 2020, 5:20 PM <ch...@wbmfg.com> wrote:
--Couple of our guys came to check some thing at the shop today, the OSP crew ready room was full of smoke.Our horizontal directional drills use sondes in the drill head for tracking purposes. We recharge the batts every time they come back to the shop.The batts we use are smaller than normal sonde bats so they fit into an adapter, sabot type of thing.The industry standard is double C cells, but the vibrations are such that normal C cells will give you intermittant service. So most use a special 3 volt battery that is probably just 2 c cells welded with heat shrink.Our new locators and sondes use a voltage a bit higher than most 3.3 volt lithium. They like 3.6 volts I believe. So the smaller batteries are adapted to fit the sonde, but the charger for them requires the adapter.They really should make the charger such that the larger batts cannot be put in it.Just glad we didn’t have a fire. It did blow the corner of a piece of shelving.
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