Comment on Chinese carmaker, BYD, introduces new battery technology with 621-mile range, 620K-mile lifespan, 5-minute charge, and lower prices

crystalmerchant@lemmy.world ⁨2⁩ ⁨days⁩ ago

• felbane@lemmy.world ⁨2⁩ ⁨days⁩ ago

  This is one of those rare situations where reading the fucking manual article helps:

   A standard home charger trickles power overnight at roughly 7 kilowatts, like a garden hose. A Tesla Supercharger—long considered the gold standard of public fast-charging—maxes out around 250 kilowatts. BYD is unleashing six times that amount of energy, effectively hooking the car up to a high-pressure municipal water main.

  During a live demonstration onstage, BYD plugged in its new Han L sedan, making the battery jump from 10% to 80% capacity in exactly six minutes and 30 seconds.

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  • Munkisquisher@lemmy.nz ⁨2⁩ ⁨days⁩ ago

    The amperage to do that is insane, either you’re dumping power from town sized feeder lines (seriously limiting where you can place those chargers) or you are charging capacitors to charge the car (wasting energy and limiting how often you can charge a car at those speeds)

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    • WanderingThoughts@europe.pub ⁨2⁩ ⁨days⁩ ago

      They use battery banks, so the system can charge slowly without overloading the grid and charge the car quickly. But the user will pay more for charging that fast. I’d expect to have much more slower chargers and few of the fast chargers. Most supermarkets these days have a charger these days, so if you’re not in a rush you can just shop and charge.

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    • Dindonmasker@sh.itjust.works ⁨2⁩ ⁨days⁩ ago

      Wasting energy how exactly? Idk how efficient capacitors are in general.

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    • bitchkat@lemmy.world ⁨2⁩ ⁨days⁩ ago

      Or they crank the volts to keep amps down.

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  • WanderingThoughts@europe.pub ⁨2⁩ ⁨days⁩ ago

    What comes down to 430 miles, or about 6 hours of highway driving. It’s made for the crowd that does a road trip a few times a year and really wants to drive non stop.

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• ColeSloth@discuss.tchncs.de ⁨2⁩ ⁨days⁩ ago

  All EV batteries aren’t “a battery that size”. They’re a bunch of small batteries all strung together. The “battery that size” statement you made is pretty much meaningless.

  It’s very much physically possible to charge a battery pack at mostly empty to mostly full in 5 minutes. The tech and chemical side of actually getting it done hasn’t quite officially happened yet. Battery charge\discharge rates are measured in “C”. One C is an hour for a 0 to 100% charge. So six C would be 0 to 100 in 10 minutes. That’s doable right now. You’d need 12 C for a 0 to 100% charge in 5 minutes. That has happened yet, but it’s getting pretty close. 11 C can be done to go from 0 to 80%.

  Likely, BYD’s charging statement is based for the regular layman such as yourself and refers to something along the lines of a charge from 10% up to 80%.

  As a side note, it’s also annoying having these “new EV battery has x amount of range” is dumb. You could get that range 20 years ago if you made the battery pack a lot bigger. What you need to know is the energy density and the size. Like 400 WH per kilogram is currently a really good capacity. Double what you could get from like five years ago.

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• vext01@feddit.uk ⁨2⁩ ⁨days⁩ ago

  Another question: is how many charge / discharge cycles are possible?

  Usually the faster you charge a cell, the fewer times you can do so.

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• ExLisper@lemmy.curiana.net ⁨2⁩ ⁨days⁩ ago

  Which part of physics prevents that exactly?

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  • AnUnusualRelic@lemmy.world ⁨2⁩ ⁨days⁩ ago

    The main problem is having a charger with enough power to fill the battery that fast. But it’s more of an infrastructure problem.

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    • ExLisper@lemmy.curiana.net ⁨2⁩ ⁨days⁩ ago

      I believe those chargers are battery to battery, not grid to battery. You don’t need 2.5Mw connection directly to the charger. You charge the charger’s battery at normal speed and then pump it into the car rapidly. This means that you can charge only couple of cars in a row at that speed.

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      • AnUnusualRelic@lemmy.world ⁨2⁩ ⁨days⁩ ago

        That should work. But it sucks when you’re in the third car.

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  • oranges_in_my_a55@sh.itjust.works ⁨2⁩ ⁨days⁩ ago

    Assuming electrochemical, thermal inefficiencies?

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