Keep in mind the balance circuitry has a limited amount of current it can dissipate to bring down the high cells to match them to the weaker ones (assuming a top balance system, which I believe the Leaf uses). As the pack ages and the span between the weakest and strongest cells widens, the BMS will have to throttle the charger to allow time for the bleed resistors in the balance circuitry to do their jobs.
I bought one of the first Leafs in 2011, and I was not impressed with Nissan's cell robustness. Luckily I live in the Bay Area, and it was parked inside, and I coddled it. When I sold it in 2015 to buy a Tesla, It had no capacity bars missing, but I was an outlier. I know Nissan has definitely improved the chemistry over the years, but still I see a lot of Leaf packs with marked loss of capacity. One of the nice things about having large packs like Tesla uses, is each cycle is a much smaller percentage of capacity, so degradation is greatly reduced. On an older Leaf, there was such little capacity that you often found yourself using much more of the pack on a daily basis, which quickly ends up in a "downward spiral" as initial degradation means even more capacity is needed every day. Such a shame, every other aspect of the Leaf was so well done. So many Leafs have been scrapped now that are otherwise good cars just having useless packs. One of the largest arguments that EV pundits constantly bring up is that the overall energy and climate footprint that goes into an EV during its creation still needs to be "paid back". Of course we all know this is true for both EVs and ICEs alike. IMO, This is one of the most overlooked things about EVs, so I enjoy saving otherwise useful EVs back "from the dead" by restoring salvage cars and getting them back on the road. I've saved (or helped save) several thousand Teslas from the scrap heap now, and even started a company with some friends now to "upcycle" used ICE Vans by repowering them with slightly used Tesla powertrains. ( https://maxwellvehicles.com/) This is a win-win, because it's recovering that otherwise lost footprint, as well as taking an existing ICE off the road at the same time, resulting in an excellent performing van with wide utility. It's sad that there isn't any similar effort put into Leafs to re-use the components or put new packs in. There are a lot of them out there! -Phil On Sat, Dec 12, 2020 at 6:02 PM Bob Bath via EV <[email protected]> wrote: > My experience has been same: more time from 80 to 100%, plus since current > is tapering back, equalizing time as well. > > (7 yr old pack; 2013; charged to 80%, with once per month to 100%). > Leafspy indicating 80% of original capacity. > > Sincerely, > Bob Bath > > Note: any misspellings of the contents of this message are due to 55 y.o. > vision, hyperactive spell check changing what I typed, or fat fingering— > not cluelessness. > > > > On Dec 12, 2020, at 5:29 PM, Lawrence Rhodes via EV <[email protected]> > wrote: > > > > The comment is based on my experience with the Leaf. After so many > months of under charging to 80% it took an extra hour stalled at 40 minutes > when charging fully. Car is doing great. Might sell to get Cybertruck. But > that will be a while. I guess the question is, is this normal? Lawrence > Rhodes > > -------------- next part -------------- > > An HTML attachment was scrubbed... > > URL: < > http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20201213/1be4a0cd/attachment.html > > > > _______________________________________________ > > UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub > > ARCHIVE: http://www.evdl.org/archive/index.html > > INFO: http://lists.evdl.org/listinfo.cgi/ev-evdl.org > > Please discuss EV drag racing at NEDRA ( > http://groups.yahoo.com/group/NEDRA) > > > > _______________________________________________ > UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub > ARCHIVE: http://www.evdl.org/archive/index.html > INFO: http://lists.evdl.org/listinfo.cgi/ev-evdl.org > Please discuss EV drag racing at NEDRA ( > http://groups.yahoo.com/group/NEDRA) > > -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20201213/803d8679/attachment.html> _______________________________________________ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub ARCHIVE: http://www.evdl.org/archive/index.html INFO: http://lists.evdl.org/listinfo.cgi/ev-evdl.org Please discuss EV drag racing at NEDRA (http://groups.yahoo.com/group/NEDRA)
