I posted early this morning about what I thought could very well be a change to the way the pack is being heated in 6.2:
The huge unexpected positive is that I'm fairly certain this firmware update has significantly improved the pack heating when on shore power. I say that because while it was 29 degrees F here when my wife left this morning, she left without a regen limit. That has never happened before in conditions quite a bit warmer than this. Add to that the following bit of information: we normally preheat the car, with range mode off, to warm the pack, for anywhere from 15 to 30 minutes in the morning, before she leaves. This morning we did not do that, because I didn't want her to try to connect with the app before I saw car-side whether or not the update had completed successfully. I had timed the charge of the batter to end within about 30 minutes of when she was leaving, but I usually come pretty close to that. It has been our experience that no matter what we have done to heat the pack in the past when on shore power, the pack never heats beyond a regen limt of 30 if it is cold enough to limit regen beyond that, as it certainly was this morning.
I realize this is only one data point, but unless this was some weird side effect of the actual firmware update process, and not a feature built into the firmware, I am very pleased about this. It may mean we no longer have to preheat the cabin to warm the pack when on shore power, or that we don't have to preheat it as much, and / or that we can get more regen available from doing so.
I'm hoping to hear others confirm similar experiences. It'll mean even more coming from those who didn't just complete the firmware update.
Well, I can't say any more about the change above, but I drove the car this evening and I noticed another change. It's not inconsistent with the one above.
My wife had returned home from work and her hour drive with the Tesla, so the pack was good and warm. The car sat around for about 45 minutes, and then I took it on a very short trip, where I then let it sit in the cold for close to two hours. The temperature was probably about 35 degrees F, give or take. I didn't preheat the car, and when I started on my very short (5-7 minute) drive back home the regen bar was at about 15. I had range mode on, so I would have expected it to stay there for my entire trip home. Well, I'm not sure at what point it happened, but at some point before I got home the regen line disappeared entirely!
Assuming my car is not malfunctioning, and somehow pack heating and regen changes have been incorporated into 6.2, I'm really not sure how to explain that. Clearly the pack could not have been heated significantly in the very short time I was driving. I know people here have talked about Tesla learning things about the batteries' real capabilities with respect to supercharging and the taper, and how perhaps Tesla could now be somewhat more aggressive. I wonder if perhaps Tesla has decided that for short bursts of regen, the pack can accept that kind of charge while at lower temperatures, without damage, and has modified the regen limits and associated pack temperatures accordingly. If so, that would also explain what I saw this morning, (although that could also be explained by having heated the pack to a higher temperature while on shore power.)
I'll be driving the car tomorrow, and will not have charged it immediately before. It will have been on shore power. I'll preheat the cabin for a while first, as I always do, and see how my regen tomorrow compares with what it has been in the past.
I'd be interested in hearing if others are seeing changes consistent with what I'm seeing.