• High-density batteries could be huge for electric passenger aircraft

    From Larry Dighera@21:1/5 to All on Sat Apr 22 09:21:30 2023
    https://newatlas.com/energy/catl-500-wh-kg-condensed-battery

    CATL launches ultra-high density 500-Wh/kg "condensed battery"
    By Loz Blain
    April 20, 2023

    CATL says it's ready for mass production of super-dense 500-Wh/kg lithium batteriesCATL
    VIEW 2 IMAGES

    In huge news for zero-emissions aviation, Chinese company CATL is set to go
    to mass production on a "condensed battery" it says can squeeze in more than twice as much energy as a Tesla Model Y battery, by weight while being
    safe enough to fly with.

    Lithium batteries started an avalanche of innovation when they became widely available, largely because they could hold significantly more energy by
    weight than other contemporary chemistries. Touchscreen smartphones, drones, all-day laptops, long-range electric cars and the first generation of battery-powered aircraft were some of the results.

    But more energy storage is always better you can either make things last longer, or weigh less and manufacturers have been racing to raise the bar with next-gen battery technologies. One key metric in the aviation world is specific energy the amount of energy stored per kilogram of battery, and
    CATL says it's ready to set a new benchmark.

    The lithium-based condensed battery was launched Wednesday at the Auto
    Shanghai expo, with CATL claiming blockbuster energy density figures "up to
    500 Wh/kg." The highest density cells we've seen previously would be from Amprius, which was shipping batteries at 450 Wh/kg more than a year ago. Meanwhile, the 4680 battery cells in Tesla's Model Y are being measured at around 244 Wh/kg.

    CATL says the new batteries feature innovations in "ultra-high energy
    density cathode materials, innovative anode materials, separators, and manufacturing processes," and use "highly conductive biomimetic condensed
    state electrolytes to construct a micron-level self-adaptive net structure
    that can adjust the interactive forces among the chains," improving performance, efficiency and stability.

    Other than the banner figure for specific energy, the company is giving
    little away at this point. We don't yet know what these cells will offer in terms of energy density by volume, for example, or power density. CATL says they'll deliver "excellent charge and discharge performance as well as good safety performance."

    High-density batteries could be huge for electric passenger aircraft

    CATL
    The company says it's already partnering with electric aircraft companies, looking to satisfy aviation-grade safety and quality standards. Clearly this will be of extreme interest to anyone developing an eVTOL aircraft, provided the cells can put out enough power for VTOL operations but electric fixed-wing passenger aircraft will also get an impressive range boost out of this tech.

    CATL says it "can achieve mass production of condensed battery in a short period of time," and indeed, it expects to put an automotive-grade version
    of this battery into mass production before the end of the year although
    we don't know what kind of specific energy figure we can expect from that.

    We've seen plenty of next-gen battery technologies promising huge density figures over the last five or more years, but far fewer that make it through
    to the product stage. So it's exciting to hear that these are likely to
    start rolling out in serious numbers in the coming months.

    Source: CATL
    https://www.catl.com/en/news/6015.html

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  • From Jim Pennino@21:1/5 to Larry Dighera on Sat Apr 22 10:20:59 2023
    Larry Dighera <LDighera@att.net> wrote:

    https://newatlas.com/energy/catl-500-wh-kg-condensed-battery

    CATL launches ultra-high density 500-Wh/kg "condensed battery"

    Jet-A ~12,000 Wh/kg

    Still a way to go, but on the bright side electric airplanes essentially eliminate weight and balance issues. If the aircraft is at max gross on
    take off, it will still be at max gross on landing.

    Watch the Ford F-150 Lightning Fire That Stalled Production for Five Weeks

    https://www.roadandtrack.com/news/a43669883/watch-the-ford-f-150-lightning-fire-that-stalled-production-for-five-weeks/

    "As electric vehicle production ramps up across the automotive industry,
    EV battery fires are starting to draw more attention from potential
    owners and emergency services alike."

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  • From Larry Dighera@21:1/5 to All on Mon Apr 24 11:11:14 2023
    What is the energy density of LH2 compared to Jet-A?



    On Sat, 22 Apr 2023 10:20:59 -0700, Jim Pennino <jimp@gonzo.specsol.net>
    wrote:

    Larry Dighera <LDighera@att.net> wrote:

    https://newatlas.com/energy/catl-500-wh-kg-condensed-battery

    CATL launches ultra-high density 500-Wh/kg "condensed battery"

    Jet-A ~12,000 Wh/kg

    Still a way to go, but on the bright side electric airplanes essentially >eliminate weight and balance issues. If the aircraft is at max gross on
    take off, it will still be at max gross on landing.


    Electric motors don't lose power as altitude increases as IC engines do.


    Watch the Ford F-150 Lightning Fire That Stalled Production for Five Weeks

    https://www.roadandtrack.com/news/a43669883/watch-the-ford-f-150-lightning-fire-that-stalled-production-for-five-weeks/

    "As electric vehicle production ramps up across the automotive industry,
    EV battery fires are starting to draw more attention from potential
    owners and emergency services alike."


    They've got a long way to go before they reach the level of aircraft fires, I'll bet.

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Jim Pennino@21:1/5 to Larry Dighera on Mon Apr 24 11:41:34 2023
    Larry Dighera <LDighera@att.net> wrote:


    What is the energy density of LH2 compared to Jet-A?

    LH2 is ~33,000 Wh/kg.

    Ignoring those pesky little problems of production, storage, cost and transport, burning hydrogen in an engine produces HUGE amounts of NOx,
    i.e. smog.

    A hydrogen fuel cell reduces energy density (not counting the physical
    fuel cell) by abut a half.

    On Sat, 22 Apr 2023 10:20:59 -0700, Jim Pennino <jimp@gonzo.specsol.net> wrote:

    Larry Dighera <LDighera@att.net> wrote:

    https://newatlas.com/energy/catl-500-wh-kg-condensed-battery

    CATL launches ultra-high density 500-Wh/kg "condensed battery"

    Jet-A ~12,000 Wh/kg

    Still a way to go, but on the bright side electric airplanes essentially >>eliminate weight and balance issues. If the aircraft is at max gross on >>take off, it will still be at max gross on landing.


    Electric motors don't lose power as altitude increases as IC engines do.

    Yep, that becomes a big problem over about 40,000 feet.


    Watch the Ford F-150 Lightning Fire That Stalled Production for Five Weeks
    https://www.roadandtrack.com/news/a43669883/watch-the-ford-f-150-lightning-fire-that-stalled-production-for-five-weeks/

    "As electric vehicle production ramps up across the automotive industry,
    EV battery fires are starting to draw more attention from potential
    owners and emergency services alike."


    They've got a long way to go before they reach the level of aircraft fires, I'll bet.

    Well, yeah, first someone would have to build more than one before a
    bunch of them parked together could catch fire.

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