I didn't like the idea of thousands of little cells either, when I first looked at the Tesla design.
The key word here is "availability", not MTBF, or reliability. The Tesla battery can withstand many single point failures without affecting performance or operation of the car, therefore the car remains available in spite of failures. Individual Tesla cells are also fused which reduces fire danger. Single point failures in large format batteries cause greater percentage degradation per failure. I had a career in public transportation and availability of rolling stock is a very important aspect of any fleet of buses. > Wow, huge misunderstanding of "reliability".. > > There is a huge difference between the poor reliability of large numbers > of > single-point failures compared to the HUGE redundancy in the Tesla battery > with dozens of parallel redundancy at each step of the battery. I'd take > the Tesla design any day as being far more reliable... > > Bob > > > On Monday, October 8, 2018 3:45 PM, Mark Hanson via EV > <ev@lists.evdl.org> > wrote: > > Aside from the high price the main reason I wouldn't buy a Tesla is > they're > the only manufacturer that has uses 6800 flashlight batteries (2170) in an > onroad vehicle. I just think of all those points of failure and the > complexity of monitoring that reduces reliability. While Consumer Reports > gave it high marks for handling etc, they gave it a low score for > reliability. Currently they send a "Tesla Ranger" out to your house for a > battery field repair as this cost is built into the price of a pricey car. > I don't know how this business model will work on lower prices $30k > versions. I'm surprised the media doesn't mention the thousands of itty > bitty cells in a Tesla and that no one else does it that way for > reliability > reasons (even with each one fused) Have a renewable energy day Mark in > Roanoke Va Www.Reevadiy.org. > > Sent from my iPhone > _______________________________________________ > 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/20181009/f8a47d14/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) > _______________________________________________ > 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) > > _______________________________________________ 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)
