Certainly the BEV dan be designed to make the battery swappable, or to make it modular and adding another module for longer range becomes feasible simply putting the pack modules in a box below the cabin floor could be one solution but a retrofit to a model which never intended supplemental packs may be unreasonable (That and other details is what screwed "Better Place !" ) The key here is allowing range flexibility whether or not it is variable , may be a marketable premium detail.
On 8/28/14, Michael Ross via EV <ev@lists.evdl.org> wrote: > All I am saying is that "simply" is not really that simple. Tesla made a > very good choice with their battery design. For them it IS simpl-er. It > took a clean salte for them to do it. > > Handling is not an issue for the S by virtue of that choice. > > There is a certain material inefficiency to make the car larger for > something it only has to do occasionally. It is a choice I would not make. > I would buy a car that does most of my traveling in its standard form. > When on a long trip, I might rent or drive ICE. I used to buy careworn > used cars and rent for trips to save money. It makes sense. > > > On Thu, Aug 28, 2014 at 12:32 PM, Willie2 via EV <ev@lists.evdl.org> wrote: > >> On 08/28/2014 11:16 AM, Michael Ross via EV wrote: >> >>> Hi Ed, >>> >>> I agree with your logistical work up. It makes sense. But... >>> >>> " can simply have the pack swapped" >>> >>> This jumps out at me as a stretch. You are talking about putting in >>> 140% >>> more battery pack to get to 60kWh At the very least, you would have to >>> buy >>> a car with 140% more space in it for batteries than it needs most of the >>> time, and the effects on handling can't be negligible. If it was trunk >>> space, then when making a long trip you would reduce your carrying >>> capacity significantly. No car designer would look at this as "simply." >>> >>> You may have a conversion mindset. A well designed purpose built EV >>> can >> easily accommodate a range of battery sizes. Witness the Tesla S, >> originally offered with three sizes. 40-85kwh. And I doubt there was >> much >> difference in the center of gravity between the three batteries. With >> the >> improving energy density, we can soon expect 100+ kwh in the same form >> factor. >> >> _______________________________________________ >> 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) >> >> > > > -- > Put this question to yourself: should I use everyone else to attain > happiness, or should I help others gain happiness? > *Dalai Lama * > > Tell me what it is you plan to do > With your one wild and precious life? > Mary Oliver, "The summer day." > > 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) 550-2430 Land > (919) 576-0824 <https://www.google.com/voice/b/0?pli=1#phones> Google Phone > (919) 631-1451 Cell > (919) 513-0418 Desk > > michael.e.r...@gmail.com > <michael.e.r...@gmail.com> > -------------- next part -------------- > An HTML attachment was scrubbed... > URL: > <http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20140828/943cd512/attachment.htm> > _______________________________________________ > 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) > > -- Dennis Lee Miles (*evprofes...@evprofessor.com <evprofes...@evprofessor.com>)* * Founder: **EV Tech. Institute Inc.* *Phone #* *(863) 289-0690 (12 noon to 12 midnight Eastern US Time)* *Educating yourself, does not mean you were **stupid; it means, you are intelligent enough, **to know, that there is plenty left to learn!* * You Tube Video link: http://youtu.be/T-FVjMRVLss <http://youtu.be/T-FVjMRVLss> * _______________________________________________ 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)
