Tesla actually has tried it and actually had a swap out station on i5 to test market response. But people just don’t mind the 15 or 20 minute supercharge time. Pull in, hook up, walk over and get a coffee, pee, get a snack. By the time that is done the car is ready to go and you hit the road. Rinse and repeat three hours later. For most it’s not a big deal.The main hangup on batteries is that manufacturers are so hung up on bespoke batteries. They design a battery and build a car around it. They need to build them like flashlights. Dead batteries? Swap in some fresh and back to work. In Thailand someone has already started this with electric scooter/mopeds.
Same thing could be done with cars and trucks. On cars, flat batteries in the floor or something. Pull up, open the rocker panels, push batteries in on side which pushes them out the other. Pay for the difference between the state of charge of you trade-in versus the 100% ones you just got. Bigger vehicle, more battery packs.
One barrier is the changing technology though. No one wants to be stuck with a big investment in one only to have it upstaged by something better that requires a whole different setup. Like if someone does do hot-swap battery packs, all of a sudden the entirety of Tesla goes right under the bus.
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