Aren’t there cars that already do something similar? My brother had a car that didn’t need charging I think?
But your brother had to buy gasoline. This would be a vehicle that NEVER needs charging, or refuelling.
The Nuclear diamond batteries are self charging units with a 1/2 life of hundreds of years. Kind of the Robert Heinlein “Flux Capacitor” from science fiction novels.
Will they get it to work at high enough voltages? I do not know. But they already work at low voltage.