A Tesla can charge, including DCFC at any battery temp over 0C. Only for FULL SPEED DCFC, does the pack need to be heated to around 50C..
The problem in Chicago was people with no home charging leaving packs overnight to freeze and then driving to DCFC for their daily charge expecting it would work. NO charging will happen until the pack is warmed to above freezing, and a cold-soaked pack will take a long time to get over freezing with only a handful of kW of heat input, so they just sit there at the stall waiting and waiting. Tesla's pack heating can easily maintain warm packs in almost any condition as long as they are plugged in. If these people w/o home charging had done their charge session at night before going home, they would have had no issues. In most all cases just normal driving is enough to keep the pack temp above freezing so it can charge. On Fri, Jan 19, 2024 at 10:40 AM jamie via EV <ev@lists.evdl.org> wrote: > > Thanks for the info about the Tesla thermal management relating > primarily to supercharging. Good to know. > > > The **2011** Leaf thermal management system sucks. > > The 2011 Leaf, basically Leaf 1.0, didn't have the cold weather features > that were added in 2013. > > Like Lee, we also have a 2013 Leaf. It has several useful improvements > over the 2011 1.0 version you had, including the addition of a cold > weather package and reported changes in battery chemistry. Our 2013 Leaf > kept battery temp within operating range even though parked outside in > sub-zero temps during the multi-day cold snap, and it didn't drain the > battery excessively doing so. I was reasonably impressed. > > > > On 1/19/24 11:10 AM, (-Phil-) via EV wrote: > > Yes, that only applies to full power supercharging on Ternary (NMC). If > > you don't preheat (use the nav) a Tesla can still supercharge, but if not > > that hot you will get lower peak power as well as a faster taper. This > is > > why Tesla has integrated supercharging into the navigation system, so it > > will begin pre-heating the pack before you arrive at the next station. > > Having the pack at these temperatures reduces the possibility of anode > > plating, so it's important if you want a long life with good charging > > speeds. Most of Tesla's packs can now charge at well over 3C with no > > plating because of this tight thermal control. I don't know what the > temp > > curves look like for LFP, I haven't analyzed one yet. > > > > The pack will not need to preheat like this for normal level 2 speeds. > > > > The Leaf thermal management system sucks. I had one of the original > 2011 > > models when they were first introduced. I didn't keep it long, and I'm > > glad! It's clear Nissan doesn't understand Ternary chemistry. Even at > > the slow speeds the Leaf can DCFC, it still experiences rapid > degradation. > > > > On Fri, Jan 19, 2024 at 9:44 AM Lee Hart via EV <ev@lists.evdl.org> > wrote: > > > >> > >> -- > >> Excellence does not require perfection. -- Henry James > >> -- > >> Lee A. Hart https://www.sunrise-ev.com > >> -----Original Message----- > >> (-Phil-) wrote: > >>> No, if the battery is at 60F it's simply not going to be able to run > the > >> reactions needed to charge. The minimum temp for full speed > supercharging > >> is around 125F. > >> > >> Wow; that's amazingly hot. I had no idea Tesla's batteries had to run > that > >> hot to charge. > >> > >> Do these temperature limits only apply to supercharging? I.e. can you > >> charge at lower rates at lower temperatures? > >> > >> Is this a characteristic of Tesla's batteries? Or of LiFePO4 in general? > >> > >> > >> My 2013 Leaf is sitting outside in 0 deg.F temperatures, and will charge > >> and do regen. It has a battery heater, but it doesn't turn on until it > gets > >> below about -10 deg.F. > >> > >> Lee > >> _______________________________________________ > >> 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/20240119/e563e6be/attachment.htm > > > > _______________________________________________ > > Address messages to ev@lists.evdl.org > > No other addresses in TO and CC fields > > HELP: http://www.evdl.org/help/ > > > > _______________________________________________ > 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/20240119/51c25195/attachment.htm> _______________________________________________ Address messages to ev@lists.evdl.org No other addresses in TO and CC fields HELP: http://www.evdl.org/help/
