With the recent huge reductions in the cost of the Models S and X, I was just thinking about what could be the next battery size for a new Model X and Model S by working from the old 18650 battery cells specification compared to the new 2170 battery cells specification that power the Model 3.
Please feel free to correct my maths, but as I understand it assuming a current P100DL has 8,256 cells of the 18650 batteries each weighing 44grams and generating 3.7v at 3400mA. Equals 363.264 kilos in weight and an actual power storage of some 103.860Kwh. Tesla holds about 3-4% of a battery pack in reserve to prevent it from becoming fully discharged, hence the 103kw calculation seems correct for a P100DL.
The volume of 2170 battery is 24.250 mm3 the volume of a 18650 battery is 16.540 mm3 so the number of 2170 batteries that would take up the same volume as 8,256 18650 batteries would be 5,631 giving a total power storage assuming 6,000mA per cell of 125kw which when allowing for a 4% reserve would mean a usable 120kw battery with a range of approx. 402 miles.
This 120kw battery pack would weigh a hefty 371 kilos but only 8 kilos more than the 100kw 18650 battery pack of the same volume. Due to the 5mm increase in the height of the 2170 the battery pack floor pan would have to be modified to allow for this in the Models SX which may or may not be a major issue.
Faster charging of the 2170 battery in a Model SX would also be an added benefit if they also use the M3 type of cooling system.
What do you think the next Model S and X Battery pack sizes or ranges will be as Tesla are now moving away from declaring battery pack values in KW.