Peri, It is the *speed*, not the *capacity* that suffers in very cold weather. Think of it as ions moving sluggish through the lattice that makes up the active material. The colder, the more sluggish. Forcing too much current into this can even cause faults to develop, which *are* reducing the capacity permanently, not because of the cold but because of the fault blocking the path of current in that section of the lattice, taking a little bit of the total capacity out of the picture. That is why charging must be slow in the cold, to avoid creating those faults, so that the capacity of the battery remains, albeit at lower *power* (=speed of current in or out of the battery). Hope this clarifies, Cor.
On Sun, Apr 3, 2022 at 3:50 PM Peri Hartman via EV <ev@lists.evdl.org> wrote: > > As I understand, with most Li-ion cells, the colder the cell, the less > charge it will take on. Correct ? > But what happens if a warm battery is charged and then cools off ? It > still has all its kWh, right ? And further, the temperature of the > battery does not affect how many kWh you can get *out* of it, though the > rate may change a bit. > > My 2011 Leaf has abysmal range at this point. I'm wondering if I were to > charge during the warmest part of the day, would I get a bit more range > ? I'm going to guess it won't make that much difference since the > battery is in the shade (under the car) and won't warm up much over a > few hours. But I'm still curious if the theory holds truth. > > Peri > > << Annoyed by leaf blowers ? https://quietcleanseattle.org/ >> > > _______________________________________________ > Address messages to ev@lists.evdl.org > No other addresses in TO and CC fields > UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub > ARCHIVE: http://www.evdl.org/archive/ > LIST INFO: http://lists.evdl.org/listinfo.cgi/ev-evdl.org _______________________________________________ Address messages to ev@lists.evdl.org No other addresses in TO and CC fields UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub ARCHIVE: http://www.evdl.org/archive/ LIST INFO: http://lists.evdl.org/listinfo.cgi/ev-evdl.org
