Like ion cells change volume a significant amount as they charge and discharge. The cylindrical format is really structurally better in this respect- each cell can handle the stress and the pack doesn't have to be designed to take it. Compare to pouch cells which end up in a press to keep volumetric changes controlled. Also automation in manufacturing is better with cylindrical​s. A pack of cylinders has built-in cooling channels between the cells. And what Mike N said.
On Apr 12, 2017 3:33 PM, "- - via EV" <[email protected]> wrote: > See the following for details: > > https://www.tesla.com/blog/battery-cell-production-begins-gigafactory > > I agree that Tesla is the only auto manufacturer using the cylindrical > cells, but they are used by the millions in laptops, so the technology is > well established. > > Using the cylindrical cells seems to be working for them. They can > support power levels most other production EVs don't reach. I haven't > heard of any reliability problems related to the cells or their > interconnects. > > Mike > > > On April 12, 2017 at 9:06 AM Paul Wujek via EV <[email protected]> > wrote: > > > > On 2017-04-12 08:45 AM, Mark Hanson via EV wrote: > > > > > Is tesla still using 6800 or so of 18650 itty bitty cells in their on > road vehicles like the S and model 3? Do they use these small cells in > their Tesla Wall home UPS packs as well? I wonder if they'll continue these > small cells at their giga factory in Reno since*no* other manufacturer is > doing so. > > > Best regards > > > Mark > > > Actually Mark, 18650s are so last-year, they are using 2170 cells now > > > for all of their products, and yes they will continue to use them for > > > years to come. > > > -------------- next part -------------- > > > An HTML attachment was scrubbed... > > > URL: <http://lists.evdl.org/private.cgi/ev-evdl.org/ > attachments/20170412/e411b64d/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) > _______________________________________________ > 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/20170412/4d1c729a/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)
