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

Yeah but imagine the BMS you’d need for 1MW to not have everything immediately go to hell, especially as your math puts you at 1,000 volts, 1,000 amps. You can make cables that big, and perhaps that will become standard, but this is a bit beyond comprehension with current tech.

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humanspiral@lemmy.ca ⁨1⁩ ⁨week⁩ ago
just searched for 1000a bms’s and they don’t seem ridiculously large. unlimited length cable needs under 1cm diameter copper as code. Not crazy either. And a calculator says that 10 feet would only have 4% voltage drop at 13awg (house wire size).

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- Powderhorn@beehaw.org ⁨1⁩ ⁨week⁩ ago
  I’m using 8AWG from the solar for 1,200W. While it may be overkill, well, one doesn’t want to start a fire in a van. That runs about 80A, so I’d likely be fine smaller, but 1,000 amps being “just” a centimetre is something of an absurd claim. I suppose compared to gas pumps, it’s tiny!
  
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  - humanspiral@lemmy.ca ⁨1⁩ ⁨week⁩ ago
    I agree that the calculator seems to be dangerous result. Code says that 9mm 2/0 AWG copper is needed. Insulation not counted.
    
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