Battery *swap* station - standards required!
O-kay. Just for a minute let's go down the *swappable* battery route.
You'll need these to be of a standard size, or restricted to a range of, say 3 standard sizes (I'm saying 3, as that's likely the broadest choice of fuel at your 'average' filling station at the moment, petrol/gasoline, diesel & LPG)
You'll also need to have a *standard* set of connections for these.
A *standard* method of accessing / removing them, common to ALL 3 types, if you want to make this easy. You could use 3 different set-ups (current fuelling arrangements are broadly similar across the 3 fuel types) but that could lead to queues forming for the more *popular* battery format.
Storage& recharging facilities. I figure that volumetrically, batteries are going to take up way more space than the equivalent liquid fuel per given energy/range unit.
Increased manpower. Your 'average' filling station likely runs on 2-3 people, with the customer conducting their own refuelling.
Now, as an engineer , I can envisage ways of making this a DIY process, but it's likely to involve some complicated equipment, and a reasonable degree of accuracy in aligning vehicle with equipment. Given the inability of a vast number of 'drivers' to park a car evenly inside a parking space (check out any supermarket car park), that's going to add some time to the *refuelling* process. (You could have a bank of equipment akin to the pull-through car wash for alignment/*refuelling*, but that leads on to my next point neatly...)
Finally, the big one. COST
Just how much more expensive is it going to be to go down this route?
No environmentalist bullshit here please. For the vast majority of people, it's all down to the bottom line.
"How much is this going to cost ME, NOW?
Not my kids/grandkids/great-grandkids in 20/40/60 years time, but ME, NOW?"