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EV Batteries Are Dangerous to Repair. Here’s Why Mechanics Are Doing So Anyway
(www.scientificamerican.com)
This is a most excellent place for technology news and articles.
There's a lot of ways to tackle this issue. You could have a couple of standards (think AA vs AAA batteries). Or you could make the packs smaller and more modular so different applications can have more or less of them.
No, they'd not need that. In fact, I'd say it's desirable for them to not have that.
Same voltage, yes, same cooling system? Not exactly. They'd just need to have cooling system hookups in the same place.
Loads of things like that have existed in the automotive industry. In fact, that's one of the biggest features of the big 3 automotive manufacturers is having standardized parts shared between one another.