• gandalf_der_12te@discuss.tchncs.de
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    15 hours ago

    “cool, let me know when mass production starts.”

    (“to the best of my knowledge, that is now, immediately.”)

    HiNa opened a 1 GWh sodium-ion battery factory in December 2022. Since then, both BYD and CATL have opened huge sodium-ion battery factories.

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      10 hours ago

      Yup. BYD’s 30GWh/year means 1kwh/second!

      I can’t resist cancelling the units even though it doesn’t actually make sense because it’s a capacity not a volume, as it were, but that’s a 3.6kw factory!

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          3 hours ago

          Here’s my working. There are about 31.56 million seconds in a year, which I rounded to 30 million, and so

          30 GWh/year
          = 30x10^9 Wh / year
          ~ 30x10^9 Wh / 30x10^6 s
          = 10^3 Wh/s
          = 1 kWh / s
          = 3600 kWs / s
          = 3.6 kw

          I used the duckduckgo autocalculator just now, and 30/31.56*3.6 is about 3.4, so it’s much closer to 3.4kW.

          (It’s not power output, it’s manufactured storage output. I think of it as like a factory that produces 3.4 litre capacity jugs per second, but they’re not jugs, they’re actually batteries. Big ones.)

          They could make a 120kWh battery (which would give a family car a range in the region of 450 miles) every two minutes.