The battery swap idea is not a new one. Any distribution center in the US that uses electric forklifts has been swapping out batteries for years. You’ll need a charging station and some sort of mechanical lift to lift out the old battery and put the newly charged one in the car.
I’ve seen a demo of this swap...the battery was on the bottom of the car, and a robot did the change out. Still alot of problems (see my post 21). Even a very large distribution center probably would not need power and battery space on the scale of just one gas station (I imagine a forklift only goes 10-20 miles an entire day).