On Thu, Oct 3, 2013 at 11:07 AM, Lee Hart <[email protected]> wrote: > - Lithiums are promising. 3x the range, but over 3x the cost of lead. > They only pay for themselves if the life claims turn out to be > true. So far, none of the lithiums I've tested except A123 > cells have met their specs. In particular, most lithiums are > shot in 3-5 years.
To be fair, how those batteries were treated needs to be factored in. If we went by your first set or two of lead acid batteries as a guide then we would think that lead acid doesn't last very long. I would not be surprised if most lithium packs dying in a short time were murdered/abused. That is not to say they weren't run within spec because the spec might not actually be correct for long battery life. I'm suspicious that many packs are over charged and undersized. That is partially why I went with a 200Ah pack in my Gizmo. The max current my controller can pull is still only 2.5C which is under the rating of my 11/2009 TS cells. BTW, no balancing since 7/2011 and still no measurable drift between cells. That is only 20,053Ah delivered over 9013 miles on this 2p20s pack. -- David D. Nelson http://evalbum.com/1328 http://www.levforum.com Nokia Lumia 920 Windows Phone 8 _______________________________________________ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub http://lists.evdl.org/listinfo.cgi/ev-evdl.org For EV drag racing discussion, please use NEDRA (http://groups.yahoo.com/group/NEDRA)
