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Building a water bottle battery into an actual water bottle?

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    Building a water bottle battery into an actual water bottle?

    I'm considering a BBS02 conversion for my road bike.

    I do not need a high-capacity battery. I'm guessing 2 or 3 AH will be sufficient.
    I do need something light-weight and stealthy.

    I figure a beat-up plastic water bottle will not attract unwanted attention when the bike is locked outside.

    Do you think something like this is achievable / practical? Thanks!

    #2
    Here's a stab at the possibility.

    48 volt BBS02? Perhaps, as in (using 18650 cells) at least one string of 13 cells in series. Here's the 18560 battery dimensions:
    Click image for larger version  Name:	18650-battery-size-dimensions.jpg Views:	1 Size:	81.7 KB ID:	74824






    The wide part (non-indended part) of a standard water bottle is 73mm, and it's 127mm high. So, I don't think you could fit all 13 batteries (13 cylinders within one cylinder at the bottom of the bottle, as so:
    Click image for larger version  Name:	120px-Disk_pack13b.svg.png Views:	1 Size:	8.5 KB ID:	74825






    Click image for larger version  Name:	120px-Disk_pack13.svg.png Views:	1 Size:	8.3 KB ID:	74826






    With a standard water bottle with the finger indent, I'm guessing maybe, just maybe you could fit maybe 9 batteries in the bottom, like so:
    Click image for larger version  Name:	120px-Disk_pack9.svg.png Views:	1 Size:	7.4 KB ID:	74827







    and then the remaining 4 within the indent portion of the bottle:
    Click image for larger version  Name:	120px-Disk_pack4.svg.png Views:	1 Size:	4.3 KB ID:	74828






    BUT! This double-stack height (131mm) exceeds the, again standard bottle height (127mm), even without the cell connecting wiring.

    PS. the BBS02 is hardly stealthy, unless, I guess, you paint it the frame color.
    Last edited by ncrkd; 2 weeks ago.
    Intro: http://electricbike.com/forum/forum/...ntro#post17033
    First build, Priority Eight / BBSHD / Nexus IGH
    Second build, 2018 Crust Scapegoat, BBS02 or BBSHD, Rohloff IGH
    Third build, 2018 Crust Evasion step-thru, BBS02 or BBSHD, Shimano Alfine 8 IGH

    Comment


      #3
      Buy a water bottle battery.

      Comment

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