Typically, the battery cells that are formed into packs are rigidly arranged. So far as I know, they are arranged to have a common positive cathode by being connected as a single node with a conductor. In other words, they are wired in parallel.
I'm not a chemistry major, but everything I've seen suggests that the parallel arrangement allows them to drain concurrently and maintain a near-identical charge. Now, I'm oversimplifying, because there must be some modest isolation cell-to-cell, that lets these batteries be balanced to get to a near-identical charge level at charge completion.
That said, depleting some batteries, while others remain freshly charged (or adding freshly charged cells) can cause some problems, which I'm sure someone smarter than me will explain. But, for so long as these batteries need to hold a near identical volatage, it is going to be rather challenging to have a partial swap of some of the batteries.
They are connected in a mix. Some cars use 800 V internally,its easier and safer to connect around 200 in a row to get the needed 800 V than to transform it.
That's right, it's still just a concept, and there are many engineering challenges to overcome.
Why EV gas stations are needed at all? Plug during the night and at the any parking spot. Zero time wasted refueling.
Yes. Make the energy balls as small as hydrogen. Then you drain out little balls the size of water molecules.
What if the car had, instead of 1 giant heavy battery, maybe 20 much smaller batteries. Couldn't you then plug in 20 chargers? Or just hand swap all twenty shoe-box sized batteries yourself (a good workout!)
No need for manual replacement, the battery particle balls can be injected into the power container like a fluid.
You might lookup redox flow batteries.
The thing is that anything's that's in a car gets subjected to pretty intense mechanical and thermal stress. Your thing needs to work in a [-40C,+60C] temperature range, while going over bumping roads. A small accident like someone running into you at a red light should not disrupt the connection of the batteries.
You need to maintain a rock solid connection from balls to the car, while also allowing them to move freely when at the charging station.
And then you have all the battery swap problems. And you still need a universal standard for the balls themselves.
It's a cool idea, but forget about it.