Back on topic, some of the things that have been on the news here over the last week are that (1) according to AAA, lithium batteries can lose 41% of their capacity when the temperature is 20° (2) EVs also lose range in extreme heat (3) Tesla Superchargers will not work if your battery is 30% or less, because the battery has to be pre-conditioned to accept a charge at that point.
Somewhat bad information, the range loss varies by manufacturer and model. An article I read last week stated that the Jaquar EV had the least loss of 3% which I find hard to believe. If you google the topic, there are many articles that pop up.
"Out of Spec" has done numerous videos regarding charging Teslas in very cold weather without using the BMS (Battery Management System). In one video the charge did not begin for 45 minutes until the battery was warmed up. There is a scenario in the 2wd drive Model 3 where the battery heating system maybe insufficient to heat the battery up in really frigid conditions but only for a couple of model years (strange to say because Tesla does not use model years so the whole thing is confusing).
Back to my experience, I seldom use BMS because I live too close to the supercharger. My charging rate has never slower than 44KW (which is not good) until the battery warms up which can take 20 to 25 minutes (if it is really cold). However, I have never charged below 0 degrees F and hopefully never will.
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