Where do you get your information. LiFePO4 if good even at 140F.
http://ecst.ecsdl.org/content/3/36/3.full.pdf ________________________________ From: Michael Ross via EV <ev@lists.evdl.org> To: Jeff Major <jff_...@yahoo.com>; Electric Vehicle Discussion List <ev@lists.evdl.org> Sent: Wednesday, April 1, 2015 11:42 AM Subject: Re: [EVDL] ENERDEL Battery Experiences Jeff, I am not sure why performance at ambient temperatures should make anyone feel confident about a cell. LFP for instance, starts to have serious difficulties at 104°F if it is fully charged. That is certainly ambient here in North Carolina; and that is free air, not boxed up with significant amperage scooting about. I must tell you, I don't have an axe to grind here. I simply want to point out a better way to go. That is to get better information for all. And better testing with in the industry. ENERDEL just popped up on my radar is all. They have an website that is light on good information and I waded in. I am happy to see that behind the curtain they may have more on the ball. I have been scanning the course work you provided to me, and it is very nice. When ENERDEL discusses cycle life (around page 279) I can see they clearly understand the reactivity of the positive electrode at very high SOC and how temperature makes that much worse for the electrolyte. They clearly have good information to work with and probably are engaged with Dalhousie University or the spin off Novonix to get good testing done. I am duly impressed. I still have not figured out what chemistry they have chosen. From what I have seen so far, they speak assiduously, only in general terms regarding their own cells. If they are using some inferior chemistry and electrolyte package it is clearly not because they don't know better, so I bet they are OK. Provisional blessing on them until I am better educated. Thanks for taking the time to address this with me. Mike On Wed, Apr 1, 2015 at 10:19 AM, Jeff Major via EV <ev@lists.evdl.org> wrote: > I doubt that EnerDel and its customers have overlooked anything as basic > as performance and life at ambient temperatures. It appears to me that > Hoegberg is comparing to some float stand-by application and then > misinterpreting the presented data. But whatever. They have millions of > cells in the field and no complaints of which I am aware. > > -------------- next part -------------- > An HTML attachment was scrubbed... > URL: < > http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20150401/e6911ad9/attachment.htm > > > _______________________________________________ > 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) > > -- To invent, you need a good imagination and a pile of junk. Thomas A. Edison <http://www.brainyquote.com/quotes/quotes/t/thomasaed125362.html> A public-opinion poll is no substitute for thought. *Warren Buffet* Michael E. Ross (919) 585-6737 Land (919) 576-0824 <https://www.google.com/voice/b/0?pli=1#phones> Google Phone (919) 631-1451 Cell michael.e.r...@gmail.com <michael.e.r...@gmail.com> -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20150401/dc67ff6e/attachment.htm> _______________________________________________ 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) -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20150401/eb5c73f3/attachment.htm> _______________________________________________ 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)
