GB wrote
NY wrote

My (diesel) car has a range of about 700 miles on a 60-litre tank. Diesel
has an energy density of about 38 MJ/litre.

The fact that your car can drive 700 miles without a fill-up does not mean
that you can drive it that far without a break.

The only break I have is for a quick **** by
the side of the road, not even a minute.

For me, a practical use case is to be able to drive 1-2 hours between
breaks.

I never do it like that. I routinely drive for far
more hours than that between breaks other
than a quick ****.

I have a petrol car, but if I had an electric car, I'd just plug it in at
each rest break.

Pity that wont replace what you used getting there
even if you can find somewhere to do that. I cant.

Suppose the charging process is 99% efficient - ie only 1% of the
electricity is wasted as heat. That's still a power of 1/100 MW or 10 kW.
So the batteries and the charger have got to dissipate waste heat
equivalent to three 3-bar electric fires. Gulp!

But, they only have to do that level of charging for 5 minutes. So, that's
not going to heat the car up appreciably?

Corse it will, that heat has to end up somewhere.

Perhaps the charging station will incorporate fans to help dissipate the
heat?

Thats a lot of fans.

Current charging stations don't need that, as they are only charging at a
fraction of the rate.