Comment on BYD announces charging tech that’s twice as fast as Tesla’s

• TranquilTurbulence@lemmy.zip ⁨2⁩ ⁨months⁩ ago

  What would you suggest then? Got something else in mind that can charge steadily while nobody is there, and then suddenly dump a whole lot of energy at 1 MW when someone needs it?

  source

  • Ilovethebomb@lemm.ee ⁨2⁩ ⁨months⁩ ago

    Yeah, batteries.

    The energy density of a capacitor is absolutely awful.

    source

    • TranquilTurbulence@lemmy.zip ⁨2⁩ ⁨months⁩ ago

      Ok, so what if you have basically another car battery there and discharge it at 10C or whatever? That should help with the fast charging of EVs, but it wouldn’t have a very long life span. Alternatively, you could have many batteries and discharge them at some reasonable rate. The problem is, you would need a lot of space for that. Maybe capacitors would take even more, IDK.

      source

      • Ilovethebomb@lemm.ee ⁨2⁩ ⁨months⁩ ago

        I don’t think the footprint of a battery bank a few times the size of a car pack would be too bad, probably the equivalent of a parking space.

        source
  • TheHobbyist@lemmy.zip ⁨2⁩ ⁨months⁩ ago

    Sorry didn’t mean to sound condescending, but capacitors can indeed output their charge at extremely high rates but have terrible energy storage capacity. You would need an unreasonably large capacitor bank, but it is technically feasible as that’s what the CERN has. But in this case batteries are a more suitable option, they can still be tunes between energy and power to fit the exact use case more appropriately.

    source