On 23 Oct 2018 at 13:13, bvgandhi via EV wrote: > I don't think weight is a factor here. I think the idea is to have a battery > health conscious system to improve longevity and reliability of usage, and to > have sufficient rest periods for batteries to recover discharge capacity. I > think battery swap is mainly an alternative to fast charging.
If the idea is to have batteries of differing capacity for different vehicle missions and trips, and perhaps for the EV user to pay according to momentary need, that's probably a decent idea. Not exactly original, though. It's been discussed here many times before, and no doubt in other forums. Battery swapping instead of fast charging has also been much discussed. As with anything, there are pros and cons. I'm not going to try to list them all; see the archive for those discussions. http://evdl.org/archive/ Variable battery size has been implemented on a coarse and somewhat less efficient scale with battery trailers. When you need more range, you pull a trailer full of batteries. One example is the "Solectria Super Force" that Team New England ran in 2 or 3 Tour de Sol events in the early 2000s. https://www.priusonline.com/10-ev-general/10672-tds-report-49-team-profile- solectria-super-force.html https://v.gd/M8sizS Photo: https://i.postimg.cc/B6MBBsvB/olaf-bleck-superforce-web.png OTOH, if you're talking about switching cells in and out of a battery dynamically, I don't think that's an efficient use of resources. A high capacity battery used lightly will last longer, so I can't see that you're really gain anything. Build it and prove me wrong. :-) 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 Please discuss EV drag racing at NEDRA (http://groups.yahoo.com/group/NEDRA)
