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  • Developer

    Seems like a dangerous technology. If the power density is 2000 times higher, then it means that it is able to deliver about 40 000 C or more !

    Actually we are able to charge Lipo at 6C or even 10C. For a 4 Ah Lipo, you'll need a 40 A charger to get this capability. 40A is the strongest hobby Lipo charger you can get today.

    To charge 1000 times faster, you'll need a 40 kA charger... Obviously you'll need a charger as big as your car to do that, charge cables as big as your legs, and i don't see the point to be able to charge at 10 000 C. This translate to a charge duration of about a third of a seconde...

    At this amount of instantaneous power available, imagine the result of a short, internal or external...

    Could be interesting for new destruction arms, but for our use where 40C discharge current and 6C charging is high enough even for acro fly it's not that usefull...

    Obviously we need more energy density, more power density is not so useful for us even if some improvements at this level could help a bit for high performances applications and a better cycle life.


  • Agreed - capacity is not up, but charging ability is. Also, the normal laws of physicals still apply - dumping say 10A into a 5cmx5cmx15cm space is gonna generate heat. And you're gonna need a *really* thick cable...

    More capacity would be nice, but as density goes up, does the drama level when one gets punctured...
  • Actually, we already had a blog 3 or 4 weeks back on this University of Illinois battery technology.

    Basically using micro-cellular construction they have much better denser current path.

    Batteries don't really have any more capacity but you can charge and discharge them really quickly and without damaging them.

    And they probably will eventually have a lot better cycle life too.

    The rate of discharge puts them up with super capacitors but at a much higher power density.

    There are undoubtedly some very interesting things that can be made where their capability for massive instantaneous power can actually be put to good use.

    (Hand held rail gun!)

    I would guess there capability for spectacular failure will be pretty high too.

  • @Dave good to know I am not the only person that makes designs with a "Need X Component Developed" sticker on them. Battery density is one of the main hurdles to overcome for the next wave of technology breakthroughs.

  • Seems like these massive battery breakthrough stories come about once a month or so... but nothing changes very fast in the actual market.

  • Yes indeed it wasn't the best article, I'm sure we will hear more in time. It just had me staring at a wall with designs on a set of my own wings...

    It does say that it can be optimised for more juice or increased life.

  • Developer

    According to the article it has higher power density, but not higher energy density then current batteries. So it mean that you can draw more current out of the battery quickly, and charge it quicker. A higher C rating using current LiPo terms. But it still has the same size and weight as current batteries for the same storage capacity (Mah). The author then seem to confuse terms and starts talking about 30 times smaller batteries in phones, which is in direct conflict with the previous statement about energy density...

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