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$1 billion BMS Ooops...
On 2/25/21 9:01 AM, Hank Nixon wrote:
On Wednesday, February 24, 2021 at 4:42:01 PM UTC-5, wrote: https://insideevs.com/news/490300/hy...ll-82000-bevs/ Discus amongst yourselves... The market wants: Fast charge for convenience Safety Long life for low cost of ownership It is possible to get the send two if one compromises on the first. Can't have all. Balancing packs requires time. Unbalanced packs fail or die sooner. Reality UH Just reading about the Lilium electric air taxi in Forbes, they want to draw 1.2 megawatts from the batteries for 60 seconds for vertical takeoff and transition to forward flight. You can do that sort of thing for 3 seconds in a Tesla for Ludicrous mode, but 60 seconds can fry the batteries in the air taxi. Tesla has 4000 small cylindrical cells, with a manifold in contact with all of them, with pumped liquid cooling to allow high charge and discharge rates. Most electric gliders just use big pouch cells, a lot of people just don't understand the implications of that. Lilium has raised 400 odd million bucks in funding, looking more like a pipe dream all the time. Ditto for that Alice thingie, but they've only burned 200 mil. |
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