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18650 Winding Speed

Discussion in 'Technical' started by Heinomat, Sep 2, 2016.

  1. Heinomat

    Heinomat New Member

    Sep 2, 2016
    Hi Guys,

    we try to build a cost model for cylindrical EV-Batteries in one of my university classes. From a manufacturing perspective, the achievable winding speed of cells is going to be an important factor. Therefore: does anyone of you know how long it takes to wind a 18650 jelly roll? Or even better, does anyone of you know how fast those machines wind (in rounds per minute) in general? I know it's not really Tesla's business (yet) but maybe someone of you knows something helpful...

    Thank you guys in advance!
  2. MacroP

    MacroP Member

    Jan 12, 2013
    West Oz
    I remember watching a video a few years back (can't remember if it was at a Panasonic factory) which showed the winding of a 18650 cell. There were dozens of machines in a line doing the same task. For each cell, it was all over in a few seconds. The assembly of each cell was very quick however I believe the prep work of cell foil takes time. The electrolyte is baked on to the foil beforehand or something and I think this takes the most time, maybe a few hours or even longer. I could be wrong here. I've tried to find that video recently but couldn't. The detailed manufacturing process of these cells seems to very secretive.
  3. malcolm

    malcolm Active Member

    Nov 12, 2006
    Here's a slow version

    Curious In the year 2525 instrumental music choice. Or maybe it's papa don't preach. Keep hearing both

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