[Ryland]

Nearly all EV's have an on board charger so the charging station is more or less a heavy duty cord with a fancy plug on it, they also tend to have a GFI and the new charging stations don't power up the cord unless it's got a solid connection to the vehicle it can then communicate with the vehicle to see how much current the charging station is designed to handle and there is some info that can flow back to the charging station but I can't remember what it is.
So we have the new, modern J1772 plug, the J1772 Combo (SAE quick charge) the CHAdeMo quick charge that is more common on EV's made in Japan and sold here, the Tesla standard charge plug, the Tesla quick charge plug, the Magne-Charge (J1773) paddle charger and of those there was a large paddle and a small paddle.
And of course there are the vehicles like the WheeGo that use a 220v twist lock plug, I think the Jet Electric used twist lock plugs as well and my car that used a standard Nema 2-15 plug (household extension cord).

J1772 connections are what all EV's made in the last 2 years have other then Tesla vehicles and I think the WheeGo, and I'm pretty sure that all of them can handle 110v or 220v input.
But if you look, you will see that Tesla for example sells a pile of adapter options for charging their vehicles from anything from a 110v outlet to a dryer plug.

My point tho was that these were all charging options that were used in the last 10-15 years because everyone has their own idea on how to make their product and even tho there is a standard for quick charging in the United States the Japanese standard is more common.
To get back to battery packs, some electric cars have sealed air cooled battery packs, some have vented battery packs, some have water cooled battery packs and each has it's advantage, so if you want to make a standard what is it going to be?

Also when people are stuck in traffic for 3 hours is when they tend to run out of gasoline, traffic like that also puts the least amount of load on an EV's battery, sure you have heat, a/c, lights and radio, but chances are you could sit there all day and still get to where you are going with charge left over, I could leave my EV's lights on for 36 hours before the battery pack went dead, or I could leave the heat on full blast for 6 hours... it would turn in to a sauna inside but I could do it if I wanted!

Most people get their oil changed every 3,000 miles because if you are driving short trips that is how often you should get it changed, if you do highway driving your owners manual most likely says to change it every 7,500 miles, if you do the kind of driving where you can change your oil every 7,500 miles then an EV might not be for you, they are not the right vehicle for everyone, just like pickup trucks are not the right vehicle for everyone, bicycles are not the right vehicle for everyone.