this is inaccurate in regards to a hybrid. They have enough power to charge the batteries and keep the car running down the highway. Speed limit is 75 around here and that Escape had no issue doing it.
https://en.wikipedia.org/wiki/Ford_Escape#HybridIf you are referring to a pure electric vehicle, then the best way to keep those batteries charged is to not drive it.
of course a IC hybrid motor can charge the batteries to power the electric motors while driving down the road. that's what they were designed for.
the OP is asking why the ELECTRIC MOTORS can't charge the batteries via generators turned by the electric motors while driving down the highway.
in short it takes more electric power to turn the generators than they can produce. no one has ever built ANY motor than makes more power than it consumes. if they did they would be the richest person in the world.
