Have there been any experiements (on a long distance route) to have battery packs on trains that are fast-charged at stations? In the UK a lot of routes are at least partially electrified, and EV chargers have proved it is fairly easy to supply a few hundred kilowatt electric supply to urban areas.

I know there are trams that work like this, but I'm wondering if the tech could be scaled up to trains.

https://en.m.wikipedia.org/wiki/Acumulador_de_Carga_R%C3%A1p...