Talking to resellers, I have been bugging them for test specs. Of course there is no such thing as far as I can tell. The Chinese are generally perplexed by my questioning. They show me curves, and I say, what are the conditions and equipment used to generate those curves. They send me more curves. They have blind faith in what the battery OEMs tell them and there is no push back from small scale buyers. It will take the auto OEMs to push this into the world of real manufacturing.
I found a small programmable power supply that I could afford. It has serial communication so I can runt from my PC and do some data acquisition while charging, and maybe I can use it to measure voltage while discharging and get the data (it has a measure command). SO I am going to steadily learn what I can. The Freedm Center here has a fancy battery cell cycle tester, some battery and capacitor load banks that they can use to wave shape inputs and loads. Good for life cycle testing. Very nice. But the academic mind set is very different from the DIIYer, end user POV. They seem to be in contact with Tesla, and maybe others. But talking with you all and talking with them... there is a disconnect. I hope someday some standards become accepted for LI cells. By then Li cells may not be the hot thing anymore. Hard to say. Reminds me I have not actually looked at ISO to see what is there. On Wed, Jan 8, 2014 at 9:00 AM, tomw <[email protected]> wrote: > /The fundamental problem is that the manufacturers of these new > bleeding-edge cells *don't really know* what happens to performance and > life at low temperatures!/ > > I think all we can say is WE don't really know what the manufacturers do or > don't do. > > > > -- > View this message in context: > http://electric-vehicle-discussion-list.413529.n4.nabble.com/Charging-Lithium-Below-Freezing-tp4667201p4667265.html > Sent from the Electric Vehicle Discussion List mailing list archive at > Nabble.com. > _______________________________________________ > 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) > > -- Put this question to yourself: should I use everyone else to attain happiness, or should I help others gain happiness? *Dalai Lama * Tell me what it is you plan to do With your one wild and precious life? Mary Oliver, "The summer day." 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) 550-2430 Land (919) 576-0824 <https://www.google.com/voice/b/0?pli=1#phones> Google Phone (919) 631-1451 Cell (919) 513-0418 Desk [email protected] <[email protected]> -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20140108/8b21b3c5/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)
