On 14 Oct 2014 at 17:06, David Nelson via EV wrote: > So much misinformation people have. Li-batteries already last more > than 2 years, they already charge in under 4 hours if the > infrastructure can handle it, and why do I need a 5 minute recharge > when my car is going to be parked for over 8 hours while I sleep?
Most batteries can handle a 70-80% charge about as quickly as they can discharge. Thus a battery that can handle 20C can charge in 5 minutes. A123 claims their cells can handle 35C. So, where's the breakthrough? Maybe here : the NTU researchers claim a life of 10 000 cycles. That sounds impressive, but is it necessary? If you allow for a range of 100 miles per charge, such a battery should theoretically last 1 000 000 miles. That's probably about 5 times the typical vehicle's lifetime. Who thinks that automakers actually want to build a car that lasts that long? Remember, too, that a smart man once classified all falsehoods as lies, damn lies, and battery specifications. Or something like that. It's somewhat OT and I suppose a little pedantic, but I chuckled at this paragraph in the ECN article: "Naturally found in a spherical shape, NTU Singapore developed a simple method to turn titanium dioxide particles into tiny nanotubes that are a thousand times thinner than the diameter of a human hair." There are plenty of square and rectangular universities, and probably even a few round ones. However, I think that Nanyang Technological University is the first >spherical< shape university I've heard of. The mind boggles. 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 For EV drag racing discussion, please use NEDRA (http://groups.yahoo.com/group/NEDRA)
