I am not saying they are lying, I simply think people misunderstood what Elon said. I am backing up my hypothesis with real world data on Tesla's current cell charging characteristics + facts released about 4680 battery.
Agree to disagree. I don't think its helpful to hype up 1 MW charging...
So are are suggesting that every time you add another cell in parallel it can double its C-Rating? Strings don't matter - I am talking about the fundamental unit-level cell limitations
This is an extensive study on 4680 heat characteristics: https://iopscience.iop.org/article/10.1149/1945-7111/abd44f/pdf
They concluded:
With the larger cell format, the heterogeneity in current collection resulting from high ohmic losses along the length of the jelly-roll are exacerbated and...
If you had 2 strings of 84 - for a total of 168:
You could then charge that system at 1000V - no problem.
Amps x Volts = Watts
7.2A * 1000 * 2 strings = 14.4kW charging speed.
If you try to charge this battery pack at 1000kW (1 MW) - call your daddy, it's going to explode
Number of Volts don't...
Anyone can make a 1000V battery by connecting 84 old 12V car batteries together in series. Each one can charge at 1C rate or 7.2Amps:
You could then charge that system at 1000V - no problem.
Amps x Volts = Watts
7.2A * 1000 = 7200 Watts = 7.2kW charging speed.
If you try to charge this...
This is the picture that everyone should be looking at - we need more of this 3D rendering because perspective shifting is tearing this community apart!
Catch-22, bigger batteries can charge "faster" in other words they add more range in the same amount of time. If you plug in a Model 3 to the 1 MW charger, it'll still tap out at 250kW :)... Semi on the other hand... Same battery cells!
Extra detail (can ignore): This is due to the simple fact...
Agreed. 2C on a 170kWh pack would be 340kW peak charging rate. I truly think the 4680 will be capable of that 3C+ peak rate as well but there's a balancing act between speed and longevity.
3C is 510kW on a 170kWh pack (3 x 170) which is ~2x current peak speeds of 250kW on Model Y 82kWh pack -...
Charge curves will be exactly the same. V3 charging curve is dependent on cell architecture, battery chemistry, and vehicle cooling system. The amount of "kW" that you can deliver to the car is also the same, with a higher voltage you require smaller wires and less cooling for the conductors...