My wonderment is 200,000,000+ batteries for appx 21,000 vehicles and the scale up to 1,000,000,000 batteries and more per year
------------------------------ On Sun, Jun 23, 2013 5:33 PM EDT Cor van de Water wrote: >So, maybe we should stop speculating until we can get the word from >Tesla >how they will make this work within their (limited) world. >Since they have no doubt thought about this for some time, they will >probably have ways to deal with the real problems... > >Cor van de Water >Chief Scientist >Proxim Wireless Corporation http://www.proxim.com >Email: [email protected] Private: http://www.cvandewater.info >Skype: cor_van_de_water Tel: +1 408 383 7626 > > >-----Original Message----- >From: [email protected] [mailto:[email protected]] On >Behalf Of Chris Tromley >Sent: Sunday, June 23, 2013 2:02 PM >To: Electric Vehicle Discussion List >Subject: Re: [EVDL] Subject: Re: EVLN: Tesla Parades EV Battery >SwapTechnology > >Am I the only one seeing that everyone has a slightly-to-greatly >different >idea about how this should work? All of which makes it more complicated >than the simple gas n' go paradigm it's supposed to compete with? > >Battery swapping can work great for fleets. Let it out in the wild and >plenty of people will complain about it. Some just to complain, some >with >good reason. It's not likely to succeed unless you can eliminate the >good >reasons. > >Chris > > >On Sun, Jun 23, 2013 at 12:54 PM, <[email protected]> wrote: > >> A few comments: >> >> 1.) Managing a fleet of rental packs and owned packs: >> One way to easily ensure you get your own original pack back would be >to >> make your first stop on a road trip be at a local swapping station. >There >> you could swap your say 60 kWh pack for an 85 kWh or larger pack and >pay >> the pack rental/usage fee. Tesla would store your original pack until >your >> return, or until you informed Tesla you now planned to keep the rental >pack >> (convert to owned), thereby releasing the owned pack into the rental >pack >> fleet. >> >> This model might also be able to support repeated swaps of the rental >pack >> at no additional fee or a nominal fee. A daily pack rental fee with >> unlimited swaps might work. This would be like a daily car rental fee >with >> no miles limit. >> Another approach would be the per-swap fee, and a daily pack storage >fee >> (for your original pack). Daily storage fee would end when you picked >up >> original pack or chose to keep new pack. >> >> 2.) Pack size/disparity between 60 kWh and 85 kWh Model S owners: >> It has been suggested that it may not be 'fair' for the 60 kWh owners, >or >> even the grandfathered 40 kWh owners, to be able to get access to >larger >> than original packs. Appropriate pack swap/rental pricing should be >able to >> mitigate this. If pack limits are programmable within the packs, >perhaps >> they could be set during the rental process, with lower fees for >swapping >> in smaller packs. Tesla could actually build all the packs as the same >> capacity and program in the usable capacity based on the rental >choice. An >> 85 kWh pack programmed to 60 kWh could see an extended life as it >would >> only have 71% of it's official capacity used on a given >charge/discharge >> cycle. FWIW, Tesla has announced that the 40 kWh Model S is software >> limited, but actually has a 60 kWh pack in it. >> >> 3.) Pack return logistics: >> If an original pack is dropped off at a swap station where the owner >is >> not likely to return to, the owner could ask that it be transported to >a >> nearby station he will be going to. This return logistic component >might be >> handled via a fleet of Tesla pack transport trucks (long distance EV >> trucks, nonetheless, running off the packs being transported). The >> transport trucks would also provide a supply/demand balancing solution >in >> case some stations are doing more swaps than others and are running >low on >> rental packs or storage space for owned packs. >> >> Or if Tesla can get route information from other Tesla drivers, it >might >> even be possible have these other drivers perform the transport >function as >> long as they understand the pack must be swapped at the next swap >station >> or at a particular swap station on their route. This return logistics >> option might offer drivers a free or reduced cost pack swap in >exchange for >> them dropping off the pack as-agreed. >> >> 4.) Pack sizing/form factor: >> The stakeboard chassis design could allow for a pack that has a >swappable >> component and a nonswappable component. Swappable piece would be >common >> sized across multiple models, and would be good for a significant >range. >> The nonswappable piece would permanently remain with the vehicle, and >could >> be placed in vehicle niches that would be unsuitable for swapping. >Charging >> would fill the nonswappable piece first; discharging would take from >the >> swappable piece first. Charge shuttling from swappable to nonswappable >> might also be used. A mix of swappable and nonswappable components >might >> allow for both a small car and a large car to use the same swappable >pack; >> the large car would just have a larger nonswappable section. Or if the >> swappable components were smaller units, a large car might use 3 >swappable >> units and a small car use 2 units. >> >> >> >-------------- next part -------------- >An HTML attachment was scrubbed... >URL: ><http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20130623/cde1 >53be/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) > >_______________________________________________ >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) > _______________________________________________ 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)
