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Battery and Component Teardown

Discussion in 'Model 3' started by sooner, Jun 7, 2018.

  1. sooner

    sooner Member

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    • Informative x 3
  2. sooner

    sooner Member

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    Apologies, should have given more context:

    High level highlights lifted from jalopnik.com on their overview of the article:

    • The battery has a lot of related hardware integrated into it: DC-DC converter, charger, battery management system controller, junction box, and all protection hardware are now integrated into the battery pack itself, on a big hump. On a Model S, these components are spread around the car itself.

    This means that the Model 3 itself is actually pretty lean on hardware; it has the drive motor, power steering motors, dash computer and equipment, and not much else. Most of the big stuff is now in the battery pack.

    • The battery is radically different than the Model S battery. The Model 3's battery pack does not appear to be an evolutionary design: it’s far more advanced than pretty much any other lithium battery, at least according to Jack Rickard, who did this teardown and analysis. He likens it to “examining a crashed spacecraft from another world.”

    • It has much larger modules than the Model S or X’s battery pack. The Model 3 is using four long ‘planks’ of cells, with the two outer ones containing 23 cells (each of these has 46 small cylindrical cells in it) and the two inner ones containing 25. The smaller modules weigh 191 lbs and the larger ones weigh 207 lbs.

    • The Battery Management System controller appears to use custom microchips made just for the Model 3. Nobody seems to know much about these, at least not yet, but it’s telling that Tesla had their own chips fabricated instead of using off-the-shelf components.
     
  3. e-FTW

    e-FTW New electron smell

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    #3 e-FTW, Jun 12, 2018
    Last edited: Jun 12, 2018
    So, 4,416 cells.

    At 5,000 cars per week, Fremont is outputting 22,080,000 cells per week (inside of cars). Man, that blows my mind.
    So a small leap of logic means that to sustain that car production rate, the Gigafactody outputs a similar number to keep Fremont firing Model 3s out.
    But is that “machine gun fast”, as Elon states it would?

    22,080,000/week
    3,154,286/day
    2,190 cells per minute
    37 cells per second

    Wikipedia says this qualifies as machine-gun fast: “typically at a rate of 300 rounds per minute or higher”.

    This assumes 24/7 production and ignores Model S/X and storage products.
    So, it might be quite useless, but I had a good time!
     
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  4. chronopc

    chronopc Active Member

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    The cells are produced in Sparks, NV at the Gigafactory, I believe.
     
  5. Msjulie

    Msjulie Member

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    Agree. He's much easier to read than to listen to, but now I'm inspired to listen again.
     
  6. sooner

    sooner Member

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    I did not get through the video, as he is difficult to watch, but the article provided plenty of insight.
     
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  7. e-FTW

    e-FTW New electron smell

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    Yup. I was saying that the Fremont factory was was outputting that many cells out of the factory inside of completed Model 3s.
    Said another way, the Gigafactory in Nevada is providing enough cells at a high enough rate for Fremont to be packaging that many in completed Model 3s.
    If that makes sense. ¯\_(ツ)_/¯
     
  8. scaesare

    scaesare Well-Known Member

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    As I said elsewhere: youtube 2X video speed is your friend... he only seems slightly long-winded then.
     
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  9. chronopc

    chronopc Active Member

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    It makes sense :) and I totally agree. It is pretty impressive what they are accomplishing.
     
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