Yeah, My procedure is to charge to 75% overnight normally, or higher if needed. 3-4 times a year I need to take a road trip, so I charge to 90% overnight, then 2 hours before I am about to leave, I'll take it to 100% to give it time to balance. (I have ternary/NMC not LFP) The pack doesn't sit too long at 100% when you hit the highway.
You really don't need to worry too much about balance unless you see a drop in range, then do a balance, and if you get some range back after a week or so, do it again and ad nauseum until you don't see any gain. I think doing it a few times a year does a pretty good job of keeping it in-check, but all packs are different, so YMMV. On Sun, Jan 14, 2024 at 6:27 PM Mark Hanson <markehans...@gmail.com> wrote: > Thanks Phil for the informative reply. I plugged in immediately when > getting in the driveway and waited a couple hours before unloading, chain > sawing and splitting the wood (with an electric Worx chain saw and Swisher > electric log splitter). > Last time I charged to 100% was at Cocoa Beach Florida in October. Some > EVers told me to just charge to 80% like I normally do and others say to > charge to 100% after a deep discharge- so I split the difference and > charged to 90% :-) > Next time I’ll charge to 100% is when going to Gatlinburg, Oak Ridge Tn > and Mammoth Cave Ky in February. > Stay Charged, > Mark > > Sent from my iPhone > > On Jan 14, 2024, at 4:41 PM, (-Phil-) <p...@ingineerix.com> wrote: > > > You are fine, just don't let it sit at low SoC. The "battery damage" > comes from the fact that Tesla's BMS on the 3/Y are somewhat parasitic, and > continue to suck power from a discharged pack. There is added degradation > from time spent at low SoC, but not "damage". > > You do not need to do a balance charge often. I'd say 3 to 4 times a year > is sufficient, just do not let it sit at 100% after this charge. Plan to > drive it soon after it finishes. LFP is less susceptible to this kind of > degradation, but it still happens. > > On Sun, Jan 14, 2024 at 1:20 PM Mark Hanson via EV <ev@lists.evdl.org> > wrote: > >> Hi folks >> I just did a bad thing , hauled a bunch of firewood in my 5x8 Lowe’s >> trailer behind my Tesla Y and the range dropped more than I thought it >> would. I didn’t run the mini split heat pump and kept speed at 45mph (much >> to the chagrin of red neck truck drivers behind me) and got home at 0%. >> When I turned the EV off the display said charge immediately or cause >> battery damage! >> When I used to convert EVs with balancers on LiFePO4 chemistry, to >> rebalance the pack after a deep discharge, I’d charge to 100% once >> (normally 80%). >> What’s best? >> Mark in Roanoke va >> >> Sent from my iPhone >> _______________________________________________ >> Address messages to ev@lists.evdl.org >> No other addresses in TO and CC fields >> HELP: http://www.evdl.org/help/ >> >> -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20240114/27c65bb2/attachment.htm> _______________________________________________ Address messages to ev@lists.evdl.org No other addresses in TO and CC fields HELP: http://www.evdl.org/help/
