I’ve been thinking about this for a while and it seems to me the biggest problem with viability of electric cars is the battery charging time vs. the potential distance per charge. If one can only drive 200 miles and then have to let the car charge for as much as a day and a half before driving another 200 miles the cars will never be good for much beyond local commuting. A battery needs to give at least 200 miles and maybe more like 300 between charges and would need to be charged in time comparable to filling a tank with gas to really take off in the market.
Since the charging time is more likely to be the primary issue - I can see technology extending the distance - I have a general idea that I think could work.
Why not exchange batteries instead of recharging them in the car? I picture a “universal” battery (probably different sizes for different types of vehicles, but standardized for sedans, suvs, trucks, etc.) that can be removed and replaced by a fully charged one, and then the depleted battery would be charged and used in a different car later.
The driver would pull a car into a specified dock at a service station. The car would slot in like a plug into a socket and the battery would be removed robotically and replaced with a full one. The spent battery would then be put into rotation for recharging and a new bar code would be attached showing the durability and life remaining on the battery.
Meanwhile, you would simply pay for the charging and replacement service, not for a whole new battery.
This way the time a driver would have to wait to take off again would come down to minutes rather than hours/days.
The batteries could, of course, be charged up overnight once the destination had been reached, but that would just be an option, not a requirement.
This is just an idea and I’m sure I’m missing a number of problems, but it seems like the most reasonable solution. Thoughts?