My questions is.... How can you be sure? Are you positive the Leaf instrumentation measures capacity correctly. They claim it is all an instrumentation issue not a battery issue. The I-MiEV instructs the owner to periodically drive the vehicle almost empty and then recharge fully to keep the fuel gauge accurate.
Sent from my iPhone > On Mar 27, 2015, at 6:03 AM, Willie2 via EV <ev@lists.evdl.org> wrote: > >> On 03/27/2015 12:50 AM, EVDL Administrator via EV wrote: >>> On 26 Mar 2015 at 19:57, Ben Goren via EV wrote: >>> >>> That's the idea behind my suggestion of a "remaining (usable) kWh" >>> gauge ... >> Sounds good to me. >> >> Solectria had a simple answer to this. They gave you a straightforward amp- >> hour meter. As you drove, it counted up; as you charged, it counted down. >> When the charger shut off, it zeroed itself. >> > After a few years driving my conversion with a TBS amp-hour counter, I was > expecting something as straightforward in my Leaf. I don't know how modern > factory EVs estimate the battery capacity but on the conversion, I felt the > need to do the occasional "capacity test". I would fully charge and balance > and then pull it down until some cells started going low. I reported the > tests here amid quite a bit of scepticism. My 260ah ThunderSky LFP cells > started off giving me about 300ah. They smoothly declined over the years and > are currently about 230ah. I was expecting similar or better performance on > the Leaf battery. I was sorely disappointed. The conversion went about 50 k > miles over about 7 years and suffered about 20% capacity loss from new (a bit > more than 10% from advertised). While the Leaf lost 30+% in two years and > 20k miles. Both batteries endured the horribly hot summer (about 100 days > above 100 deg) that so damaged the Leaf battery. The ThunderSkys seemed una ffected. > _______________________________________________ > 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)
