Rarely what one can get for free is useless. People even sleep in cardboard boxes. So is the idea to push forward the responsibility to recycle? This is no business per se. If something it's just smarter use of existing resources.
What it comes to better electrolytes.. that is HARD! The testing cycle to confirm lifetime and usability is way too long. Accelerated aging tests are not the same at all to real life use. While I have to admit I was wholly impressed by the Hydro Quebec battery research lab. Boy do they have toys there! :D (droool) Advancements in R&D are available as we can now see more deeper and more accurately with color-SEM and such. Does it not go without saying that one should not use cell-murder (tm)? BMS has to be done right. -Jukka P.S.- Dear Santa. I would like to have a $10bn to research more. Thank You! 2016-09-23 14:47 GMT+02:00 Michael Ross via EV <[email protected]>: > Advances in testing are just beginning to drive more effective research. > For example tiny adjustments in electrolyte components can yield big > improvements. The testing is faster and provides more granular > investigations. > > Re LFP you mistreat them and they die a quick death, but stationary apps > you can treat them well. > > EV battery packs may not be optimal compared to purpose built stationary > packs but they are far from useless. > > Mike Ross > > On Sep 23, 2016 4:43 AM, "Jukka Järvinen" <[email protected]> wrote: > > > Usually the internal resistance is growing much faster than the loss of > > capacity. So if you use the pack in very low power application you will > be > > able to use the pack for some time (several years). This is for LCO, LMO > > and NMC. Maybe NCA too (cannot say for sure yet as I do not have usage > data > > from those yet). > > > > Basically the combination of low voltage chemistry, cool temperature > > during use and shallow cycles will provide long life for the cells. LFP > has > > at least 5 to 10 years more calendar life than those mentioned above. > Then > > again LTO-cells should have even slower rate of unhoped side reactions at > > the chemistry level compared to LFP. But LTO has hard time to compete > > against LFP net cost. Which is dirty cheap. > > > > Stationary batteries are designed for the use. Meaning their cost to > > buffer each kWh and provide power is much much less than the EV type > cells. > > Currently for large utility scale units the cost to buffer is around one > > cent per kWh. > > > > -Jukka > > > > > > > > > > 2016-09-23 8:45 GMT+02:00 Michael Ross via EV <[email protected]>: > > > >> I believe batteries, and Li-ion as well as future designs will not > degrade > >> much for a decade and more when properly managed. Understand that > 'Lithium > >> batteries" covers a large and disparate group of designs. So, any > comment > >> can be quibbled over. > >> > >> What is known now, a loss of 85% would probably be accompanied by > physical > >> and chemical damage that might render them unreliable at greater loss. > But > >> certainly Li-ion if managed well could be useful down to 30% SOC. > >> > >> The rub here is "well managed." Proper management will depend on the > exact > >> electrode and electrolyte chemistry, the construction of the cell, > >> temperature of operation and storage, particularly at high SOC%. and so > >> on. > >> > >> Anything we say is dependent on a host of variables. I think the body > of > >> knowledge will grow and all these difficulties will drop in > significance. > >> > >> You did not say in what application the degradation to 70% SOC would > occur > >> but safe to assume you meant in cars. Tesla already committed to > creating > >> rid based applications for "degraded" batteries. Their belief is that > >> stationary applications are far easier on the cells than mobile and > >> automotive apps. Allowing us to believe there is a very good chance that > >> car batteries will likely have a second life. > >> > >> Does anyone know how low the capacity of a battery can fall before it is > >> no > >> longer > >> useful, and how long will that take? At least 50%, probably more. 15% > is > >> too low for current technologies. > >> > >> For example, can the capacity shrink down to 15% SOC and still provide > >> useful power, how long would that take? Depends. > >> > >> It will continue to improve. > >> > >> Mike > >> > >> > >> On Fri, Sep 23, 2016 at 12:32 AM, Larry Gales via EV <[email protected] > > > >> wrote: > >> > >> > Most scenarios assume that Lithium batteries for EVs should be > replaced > >> > when they degrade to 70-80% of their initial capacities, after which > >> they > >> > might serve as storage batteries for the grid, or a house. Does > anyone > >> > know how low the capacity of a battery can fall before it is no longer > >> > useful, and how long will that take? For example, can the capacity > >> shrink > >> > down to 15% and still provide useful power, and how long would that > >> take? > >> > > >> > > >> > > >> > Thanks, Larry > >> > > >> > -- > >> > Larry Gales > >> > -------------- next part -------------- > >> > An HTML attachment was scrubbed... > >> > URL: <http://lists.evdl.org/private.cgi/ev-evdl.org/ > >> > attachments/20160922/84aa5308/attachment.htm> > >> > _______________________________________________ > >> > UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub > >> > http://lists.evdl.org/listinfo.cgi/ev-evdl.org > >> > Read EVAngel's EV News at http://evdl.org/evln/ > >> > Please discuss EV drag racing at 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> Mobile > and > >> Google Phone > >> > >> [email protected] > >> <[email protected]> > >> -------------- next part -------------- > >> An HTML attachment was scrubbed... > >> URL: <http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/ > >> 20160923/7d4a7fbd/attachment.htm> > >> _______________________________________________ > >> UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub > >> http://lists.evdl.org/listinfo.cgi/ev-evdl.org > >> Read EVAngel's EV News at http://evdl.org/evln/ > >> Please discuss EV drag racing at 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/20160923/74e062c3/attachment.htm> > _______________________________________________ > UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub > http://lists.evdl.org/listinfo.cgi/ev-evdl.org > Read EVAngel's EV News at http://evdl.org/evln/ > Please discuss EV drag racing at NEDRA (http://groups.yahoo.com/ > group/NEDRA) > > -------------- next part -------------- An HTML attachment was scrubbed... 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