On Fri, Mar 27, 2015 at 5:43 AM, Paul Dove via EV <ev@lists.evdl.org> wrote: > Well that just verifies what I said. You have no data other than coming from > the Leaf instruments. If it calculates capacity incorrectly it will shut down > the car. > You still don't know if the battery failed or the capacity measurement is off. > One would have to measure voltage and amp hours to really know what is > happening
It's pretty easy to verify pack voltage using LeafSpy or LeafDD or similar tools. I've verified that my LEAF is down close to 25% after almost 4 years and almost 40k miles in southern California. That said, the INL (Idaho National Laboratory) tested four 2012 LEAFs in Arizona over a period of about 2 years and 50,000 miles - two were only charged on L2, the other two were only charged using DC QC. http://avt.inl.gov/fsev.shtml http://avt.inl.gov/pdf/energystorage/DCFC_Study_FactSheet_50k.pdf Battery capacity was verified by pulling the packs and measuring capacity using a defined test protocol. While the DC QC cars fared slightly worse, at the end of 50k miles the L2 charged cars had lost almost 25% of their capacity and the QCed cars lost about 27% of their capacity. So yeah - the 2011-2012 LEAFs definitely lose capacity fast, especially in hot climates. The good news is that frequent QC doesn't appear to significantly change your rate of capacity loss unless you use QC nearly exclusively. -Dave _______________________________________________ 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)
