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

TranquilTurbulence@lemmy.zip ⁨1⁩ ⁨week⁩ ago

• misk@sopuli.xyz ⁨1⁩ ⁨week⁩ ago

  I have no idea how the Chinese grid holds up but it wouldn’t surprise me if they did well because they’re not allergic to central planning.

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  • Cerothen@lemmy.ca ⁨1⁩ ⁨week⁩ ago

    energy-storage.news/worlds-largest-30mw-flywheel-…

    Things like this maybe? I haven’t seen any performance days but it’s a cool project

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    • misk@sopuli.xyz ⁨1⁩ ⁨week⁩ ago

      I’ve never heard of flywheel energy storage before. This is so cool, thanks!

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• B0rax@feddit.org ⁨1⁩ ⁨week⁩ ago

  They already do. The 300kw you see around already have big buffer batteries to deliver these peak charging speeds.

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  • TranquilTurbulence@lemmy.zip ⁨1⁩ ⁨week⁩ ago

    Interesting. Any ideas which kind of batteries they use?

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• TheHobbyist@lemmy.zip ⁨1⁩ ⁨week⁩ ago

  Capacitors, lol

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  • TranquilTurbulence@lemmy.zip ⁨1⁩ ⁨week⁩ 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?

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    • Ilovethebomb@lemm.ee ⁨1⁩ ⁨week⁩ ago

      Yeah, batteries.

      The energy density of a capacitor is absolutely awful.

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      • TranquilTurbulence@lemmy.zip ⁨1⁩ ⁨week⁩ 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.

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    • TheHobbyist@lemmy.zip ⁨1⁩ ⁨week⁩ 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.

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