Lawrence Rhodes via EV wrote:
I have some left over A123 Systems ANR2665M1A cells. I would like to
use a few to power some flashlights. What charger works with these
cells? Seems the specifications call for a different voltage than
18650s due to iron chemistry.
Hi Lawrence,
Yes, the A123 cells are different than today's 18650 cells. According to
the data sheet, the recommended charge method is 3A constant current to
3.6v or 45 minutes max, then off. Float charging is not recommended.
I don't know of any commercial charger for them. But this algorithm is
simple enough to implement with a bench supply. Set its current limit to
3A, its voltage limit to 3.6v, and plug it into a timer that shuts it
off after 45 minutes.
Bill Dube used these cells, and has a lot of experience with them. He's
still monitoring the list. Perhaps he has some additional comments.
Lee
--
"All children are born engineers. Watch them at play. They're not
just playing; they're experimenting, building and learning. That's
engineering! Then we get them in school and squash it out of them."
(Geoffrey Orsak, Southern Methodist University dean of engineering)
--
Lee Hart, 814 8th Ave N, Sartell MN 56377, www.sunrise-ev.com
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