The surface area of li-ion electrodes are already on the next level. Only the mechanical design of cells and specifically the current collectors are slowing us down in the development. That'll pass soon. We rather avoid foils as current collectors. So 1990's.
We did not understand even 5 years ago how cheaply we can create new Carbon structures such as Graphene. Also solid electrolytes are giving us a completely new way to build cells (PLD for example) and I dare to expect +100C li-ion cells in various applications at that $100/kWh level which Elon mentioned. Eventually we'll be at +50 years usable lifetime, <$50/kWh and probably 50TWh annual production capacity. That'll take long time for sure. Definitely we'll be there not earlier than maybe 2025. So we'll have very cheap, powerful and durable li-ion cells in not so distant future. Those same cells will be used in the grid side to buffer any power requirement and provide digital inertia for maybe week or two. So no worries about the grid issues. Even today we can build 350kW fast charger power electronics with about $10/kW from battery to battery. So there is no huge cost to even enable these kind of super fast chargers but I think the main question is do we really need them? -Jukka ke 13. kesäk. 2018 klo 13.56 EVDL Administrator via EV (firstname.lastname@example.org) kirjoitti: > On 12 Jun 2018 at 22:21, brucedp5 via EV wrote: > > > A hybrid lithium/carbon battery system could offer the best of both > worlds " > > long-range continuous driving and long-term power storage thanks to the > > lithium unit, plus ultra-fast partial charging and extreme power output > thanks > > to the ultra-capacitor. > > Back in 2001 Solectria (RIP) built an experimental EV using a Maxwell > supercapacitor bank to manage peak driving current and regen. They ran it > through a customized DC:DC talking to the controller over the Canbus, and > claimed a 32% increase in range. > > It was just an experiment, though. Production EVs are expensive already, > and something like that would be tough to do in an affordable vehicle. > > > "Most of the energy in regenerative braking is lost as heat, maybe 80 > > percent," says Grape. "Perhaps 20 percent is recouped ... " > > Yeah, right. That must be why Axel Krause's trip over the Alps over 20 > years ago resulted in almost the same energy consumption he would have had > if he'd driven the same distance in flat terrain. > > http://www.evdl.org/pages/evergreen.html > > > The electric motors are very efficient at generating that power, but > > the battery just can't accept the charge rate. > > Good grief, how hard is he braking? > > Every battery I know of can accept regen or charging current at about the > same rate it can deliver driving current, as long as the battery isn't > over > 80% SOC. > > > Imagine simply driving your car over a surface at a charge station, > > paying for a top-up and driving away 10-20 seconds later. > > Now imagine how much power that would require from the mains. > > Who, me? Skeptical? > > David Roden - Akron, Ohio, USA > EVDL Administrator > > = = = = = = = = = = = = = = = = = = = = = = = = = = = = = > EVDL Information: http://www.evdl.org/help/ > = = = = = = = = = = = = = = = = = = = = = = = = = = = = = > Note: mail sent to "evpost" and "etpost" addresses will not > reach me. To send a private message, please obtain my > email address from the webpage http://www.evdl.org/help/ . > = = = = = = = = = = = = = = = = = = = = = = = = = = = = = > > > _______________________________________________ > UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub > http://lists.evdl.org/listinfo.cgi/ev-evdl.org > 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/20180613/11792549/attachment.html> _______________________________________________ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub http://lists.evdl.org/listinfo.cgi/ev-evdl.org Please discuss EV drag racing at NEDRA (http://groups.yahoo.com/group/NEDRA)