Current Model S/X is about 29-30 minutes 0-80% (they actually charge pretty well). I really don't see that happening with the current CT pack. The Panasonic pack 3/Y is ~32 right now. The LG pack 3/Y at 34 minutes is basically this update. Taking the 35 minutes remaining at face value a minuteish more (they round so not exact). Compared to OoS' data we'd be at mid to high 34s if we take the 2:15 at face value. IMO we probably see tweaks like after the V3 launch to be in the high 33s to 34.
Well. Aspirational I guess. The model x wins almost every time for us as a long haul people mover unless we are planing to do some off-roading or have large stuff to carry.
Hopefully the next 4680 cell revision has some improvements. We know they are working on one with better density and in theory, should have better charging characteristics.
But do you do that because of the taper? What if it didn’t taper until say 70%? Would your stops be between 6% and 70%?
Pretty much every vehicle benefits from charging lower. A select few (mostly Taycan and Audi GT) hold longer where if you are getting a good charge it is best not to risk it and fine charging to 55-60%. Pretty much every car tapers way before 70.
The most basic way of explaining is as the battery fills up, resistance is created and thus heat. Heat causes all sorts of issues if not contained. It can range from minor plating to full thermal runaway. Additionally the stresses of charging and sitting at high soc causes dendrite formation. Breaking the ability for the battery to store and release energy. Chemistry and design choices determine where the limits are. There is lots of nuance… but heat and lithium dendrite formation.
So suppose you segment the battery. So instead of a 120kwh battery (picking a round number for the sake of conversation) you have 4x30kwh batteries or 6x20kwh batteries or whatever. Could you then charge each of them at high speed until they reach whatever temp is worrisome and then move onto the next one? Could you be charging each at high speed sequentially while the first one cools and then repeat the process?
I could do that, but the waiting from 50% to 70% is time I could be driving to the next charger. Sometimes 70% won’t get me to another charger, 80% might. The calculation would be easier if you could stop anywhere, but since the chargers are only every 100-150 miles.
Not really as smaller batteries just hit limits earlier. All down to C rate. You dramatically increase the C rate and create even more heat charging smaller batteries at higher rates. And really when you look at batteries… there are hundreds (sometimes thousands) of batteries just tied together. They just charge at once.
That’s a whole topic in itself… there are varying levels of solid state (and it has evolved to misleading marketing). Where only a small portion is solid or more solid (usually a solid matrix holding the gel)… where semi or quasi solid state applies more (pretty much any marketed today). A solid state battery is simply getting rid of the liquid/gel electrolyte with a solid material (most are a polymer).
I hadn't heard of this. Exactly what battery (or batteries) are we talking about here? During the COVID supply chain chaos, Tesla had to move mountains to keep pumping out more cars, so not surprising there were some issues. Elon even commented during that time that their production involved too many different battery variations and managing them all was less than ideal. He said they needed to standardize on fewer different battery types.
