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Thread: Tesla BMS

              
   
   
  1. #11
    Senior Member Hugues's Avatar
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    Quote Originally Posted by Spaceweasel View Post
    On DIYelectriccar.com, Boekle has bridged them to 50v modules.
    http://www.diyelectriccar.com/forums...16-185161.html
    thanks for the pics,

    curious, judging by the size of the module (the pic where we see it next to the tools), how can you fit this in a motorbike ? You need to break it down further ?
    Regards from Switzerland
    My 2.5 Upgrade Thread

  2. #12
    Senior Member tomdb's Avatar
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  3. #13
    Senior Member Hugues's Avatar
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    Quote Originally Posted by tomdb View Post
    thanks for the link,

    it does involve a bit of work though, making sure not to short anything in the process or damaging cells.
    Regards from Switzerland
    My 2.5 Upgrade Thread

  4. #14
    Senior Member tomdb's Avatar
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    What is a bit of fun with out some danger. Just like any battery treat it with care and mount it in a safe housing.

    However the size still limits it into what vehicles you can stuff them.

  5. #15
    Senior Member Stevo's Avatar
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    These batteries must be degraded somewhat unless my math is wrong. Lets see:
    232 Ah / 74p =3135 mAh/cell. The 18650 is rated at 3600 mAh/cell.
    So, if I were to split up one of these modules into a 96v pack, I could get 3s of 8s18p (which would give me 12 spare cells). That would yield a 96v pack at
    about 56 Ah.
    That doesn't seem like such a big improvement over 11 Nissan Leaf modules, except that it would shave off about 38 lbs of battery weight. Now THAT is something to consider!!
    Or am I miscalculating something ?
    Original build: http://vorworxemc.wix.com/vorworx
    Current rides: '96 Honda Ohlins VFR, '03 Cannondale C440R, '03 Cannondale Cannibal, '06 Yamaha 450 Wolverine 4x4

  6. #16
    Senior Member Spaceweasel's Avatar
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    18650 just indicates the size and shape (18mm by 65mm). They can be rated at different mAH. The pic below shows one rated at 3400mAH.

    http://2.bp.blogspot.com/-qpoSSBiLF4.../Batteries.jpg

    Tesla's new batteries are 2170. I think the old ones were rated at ~3200mAH, or right about where your calculations show. If the new 2170s perform as reported, they will be almost 6000mAH. Twice the current but only a 50% increase in volume. I'm sure Elon will be happy to tell us all about them when the Model 3 is released. It will be interesting to see what the new packs look like.

  7. #17
    Senior Member Stevo's Avatar
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    THESE!! I'll wait for these!!
    https://youtu.be/ga4L1w66AbU
    Original build: http://vorworxemc.wix.com/vorworx
    Current rides: '96 Honda Ohlins VFR, '03 Cannondale C440R, '03 Cannondale Cannibal, '06 Yamaha 450 Wolverine 4x4

  8. #18
    Senior Member Spaceweasel's Avatar
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    Anyone care to venture a guess as to how long before they become commercially available?

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