Van Gogh: The Immersive Experience - Atlanta (vangoghexpo.com)
Two separate battery packs with two separate charging outlets and two separate chargers.
Evs today have only one charging outlet so far as I can discern.
Even small airplanes have two isolated fuel tanks. You can refuel them in theory with two gasoline trucks twice as fast as one.
The question you ask yourself is where is the bottleneck?
Imagine if your airplane had 512 individual mini fuel tanks. Those tanks (to reduce weight) were made of a flexible material like a balloon to reduce weight.
You have to fill each little balloon with the right amount of fuel. Filling a single balloon too fast will cause the balloon to shear and pop. Filling too much per single balloon will cause them to overfill and pop. So you have flow regulators on every single balloon to make sure they all get filled the proper amount.
Now, you've got one fuel port, and that fuel port goes to the internal pump and is distributed to the flow regulators to all 512 individual balloons.
If you design a fuel port that doesn't allow enough flow to fill 512 balloons at maximum rate at once, then your fuel port is the bottleneck. If the pump on the charging truck doesn't put out enough flow to fill 512 balloons at maximum rate at once, then your truck flow rate is the bottleneck. In either case, then yes adding another fuel port and additional trucks will help.
If your fuel port and fuel truck have enough capacity to exceed the flow rate of 512 balloons, however then adding fuel ports and additional trucks, or splitting those 512 balloons into two separate 256-balloon "packs", won't make a difference.
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To go back to the EV example in a typical charging setup...
- EV charge rate on a 120V wall outlet is ABYSMAL. A common circuit on your breaker might be 15A, giving you at most 1.8kW of charging power. If that was the only way you had to charge, connecting several different 110V extension cords (from different circuits off your breaker) to multiple charging ports would increase charge rate.
- EV charge rate on a 240V outlet is significantly better. But that doesn't mean you'll get maximum charging if you just hook it up to the electric dryer outlet in your garage. Apparently dryer circuits require 30A, so you boost yourself to 7.2kW. According to this, that only gets you to a charge level of about 18 miles of charge per hour. Probably enough for typical overnight chargers. But they make chargers that can go faster if you put in high enough breaker capacity.
- Tesla Superchargers apparently are capable of delivering 250kW. That's close enough to the maximum safe peak charging speed of the batteries themselves that there's not much reason to add another port...
An example is here:
When the battery is 20% or less, technically it can take charge faster than the 250kW charger can provide. But as soon as you get just barely past 20%, a 250kW charging station will be limited by the maximum charge rate of the battery, not the output of the charger.
And typical EV practice is to try to remain within 20% and 80% of charge to maximize the life cycle of the battery.
So the realistic bottleneck if you're looking for maximum charge rate is the limitation of the battery, not the number of chargers or number of ports.
I suppose if you had two of the Tesla v2 Superchargers hooked up together to two ports--because there were no v3 Superchargers around, technically the batteries would charge faster up until about 55% charge. But that's not inherent to single or dual ports, or single or dual packs, it's inherent to having your bottleneck be the wattage of the charger.
