Exactly since when have auto manufacturers standardized on anything? Go to AutoZone. Look at the oil filters. There are literally dozens, and that's a pretty common part. Hell, there's not even such a thing as a standard oil. Manufacturers have _never_ created a standard part, everything is unique by brand and model, and I just don't see this being any different. Exactly how large a battery are we talking here? Maybe, if the range was 5000km, it might be useful, because that's about the range of a severe-duty oil change interval, but I guarantee that it won't be as cheap as an oil change.
Auto manufacturers standardize when they are required to. A much better analogy would be the fuel fill port on a gasoline car. Although there are a number of different fuel door and cap designs, the design of the actual fuel fill port is the same on all unleaded-powered cars. The design of the pump nozzles that fill them is also standardized.
Swappable batteries make a lot of sense, especially if they are modular. Smaller cars could have 2 modules (with a bay for a third for longer trips), SUVs/trucks could have 3 or 4 scaling up to semi-trucks who could have 10 or 15 packs in parallel. Smaller modules would be easier to handle during swaps and would provide greater flexibility than swapping monolithic packs. This aluminium technology would fit right into such a system, before you take a long trip you could go have your day-to-day packs swapped out for some long-range aluminium packs so that you can do your whole trip without recharging.