Why don't electric cars use replaceable battery modules with a standard form factor? Advantages would include: 1) It allows the battery to be easily replaced as the car gets older. 2) With a suitable generic form factor, it would allow batteries to be upgraded as technology changes. 3) It would allow people to only populate enough battery slots for their daily needs. Communing to work: you only need to insert a few b…
I am not sure there are many people who want to swap out batteries when they weigh over 1000 pounds. Inserting a battery would require something to help carry and insert it which makes it have enormous user friction which makes it a non starter for most people. Not many people even want to swap out phone batteries despite those batteries being easy to carry.
Maintenance would be similar to cars today, in that those who change their own oil might be inclined handle their own batteries, whilst those who get a mechanic to change oil might get a mechanic to manage their batteries.
If batteries are cheap enough and long lived enough it's not an issue, but right now battery cost and longevity is a limiting factor. Not everybody replaces their car after a few years. The average car age is over 10 years [1], so there are plenty of cars out there much older than 10 years.
Maybe that's what is behind the sales growth slowdown? Those who replace their cars regularly (fleets) and don't care about battery longevity, are buying. Those who keep their cars for longer are hesitating, limiting the market.
Edit:
It seems like EVs already use a cell/module/pack hierarchy [2]. There's hope yet, if a particular module type emerges as a defacto standard.
[1] https://www.abs.gov.au/statistics/industry/tourism-and-trans...
[2] https://www.secondlife-evbatteries.com/collections/ev-batter...