Re: [EVDL] Battery Types
I would say that any chart would be untrustworthy unless it was put together very recently. Any chart would be possible accurate on some counts not others. It is rather unfortunate, but true. Can you be more specific about the specifications you are looking at? Provide links, etc. On Sun, May 3, 2015 at 1:21 PM, ken via EV ev@lists.evdl.org wrote: Is there a chart that shows all batteries types and the number of cycles, enegery density, heat runaway,etc. I guess theres something called MCM lin min ??? they seem to be a lttle cheaper than lifeo4 but the voltage far off a lttle faster .. ___ 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/20150503/0b17e99d/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)
[EVDL] Battery Types
Is there a chart that shows all batteries types and the number of cycles, enegery density, heat runaway,etc. I guess theres something called MCM lin min ??? they seem to be a lttle cheaper than lifeo4 but the voltage far off a lttle faster .. ___ 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)
Re: [EVDL] Battery Types
There were some nice Power vs Energy density figures awhile back for the various battery types. Most resembled fat right parenthesis )s as battery energy was traded for power and vice versa. The lithium ion curves have evidently shifted to greater power and energy levels. Lead Acid was in toward the (0,0) corner. It was either DOE or the ABC (battery consortium) that put together some circle diagrams where each spoke addressed a characteristic about a battery. One spoke was safety, another cycle life, another $/kwhr, etc. A standard was set for each characteristic and a red line connected the battery performance points relative to the goal for that standard. If the battery had a high potential to ignite, the point was in toward the center to zero. If low, the red line could be out away from the center. If the battery met all the goals, the red line was out away from the goal line. It was a quick way to visually see how well the battery was performing. The recent link to the Jeff Dahn video on battery testing indicated that different battery electrolytes could dramatically change the energy density and cycle life. With the rapid pace of development and new tools for measuring battery performance, any chart could become outdated quickly. As is often said here: There are lies, damn lies, and battery statistics. Who did the testing? Were they objective or were they more interested in helping the manufacturer sell batteries? If you really want to know a battery, you have to test it, work with it, and try it out in your application. Does it work for you? Welcome to a Smorgasbord of battery types and info. On 5/3/2015 1:21 PM, ken via EV wrote: Is there a chart that shows all batteries types and the number of cycles, enegery density, heat runaway,etc. I guess theres something called MCM lin min ??? they seem to be a lttle cheaper than lifeo4 but the voltage far off a lttle faster .. ___ 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) ___ 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)
Re: [EVDL] Battery Types
ken via EV wrote: Is there a chart that shows all batteries types and the number of cycles, energy density, heat runaway, etc. There are lots of charts on the web. Many of them tend to be written for marketing purposes; so watch out for the accuracy and spin of the data. Another problem is that things like life require a lot of expensive time-consuming testing. People who have generated such data tend to be reluctant to give it away for free. I'm an old-school show me type. I've been lied to so many times by battery salesmen that I prefer to test it for myself. Rarely do batteries perform as well as the marketing claims. -- Don't worry about people stealing your ideas. If your ideas are any good, you'll have to ram them down people's throats. -- Howard Aiken -- Lee Hart, 814 8th Ave N, Sartell MN 56377, www.sunrise-ev.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)
