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Old 02-16-2012, 07:19 AM   #11
_cy_ OP
Beastly Adventurer
 
Joined: Sep 2011
Location: Tulsa, Oklahoma
Oddometer: 5,791
Quote:
Originally Posted by Anorak View Post
I'm pretty sure that lithium cobalt and LiPo are still used in portable devices due to their greater energy capacity. A123's major advantage over LiPo and lithium cobalt is safety when charging and if physically compromised. LiPo has a better energy to weight ratio than A123 nanophosphate.
quite correct!

even though lithium iron phosphate chemistry is much more stable than lithium cobalt. Voltage requirements of existing electronics dictate which chemistry will be compatible. lithium cobalt operates between 4.2v fully charged to 3.0v dead. very little energy remains below 3.25v.

a lithium cobalt battery made from four cells x 4.2v = 16.8v fully charged to 13v dead or not compatible with a motorcycle's electronics.

lithium cobalt will be with us for many more years. greatest danger with lithium cobalt occurs during charging. here's a blast from the past..... a detailed article on that topic, I wrote back in 2007 on Candlepower Forums (thread ended up 116 pages) http://www.candlepowerforums.com/vb/...ng-re-charging

battery packs from name brand electronics with lithium cobalt will usually contain protection circuitry. due to higher energy densities and voltage requirements of existing gear. Lots of RC folks are still flying with lithium cobalt li-po packs. generally they understand the dangers and are using sophisticated chargers with balancing circuits, charging at limits their li-po packs can withstand.

_cy_ screwed with this post 02-16-2012 at 08:26 AM
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