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Out of context: Reply #59673

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  • scarabin0

    @yurimon

    i have an old green machine in my garage that i'll be modifying

    i want to extend the frame to fit an adult, widen the rear wheels so it's more stable and replace them with bike tires so i'll sit higher. the front tire will be replaced by this electric one

    http://www.ebay.com/itm/26-Elect…

    i plan on building my own 36v battery pack by buying up a bunch of old laptop batteries, then breaking them open and soldering together all the 18650 lithium ion cells inside and adding a charge protection chip so i don't blow any out. would love to get 30-40 ah out of it.

    sealed lead acid batteries are just too heavy and cumbersome

    scarabin 0Permalink
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    • I cant find the link but theres a guy builds for 80$ smaller controller from sanfran..yurimon
    • you need to test the battery cells thow out the defective ones. also type of battery..yurimon
    • yeah i'm well versed in building li-ion packs now. just finished a light staff project using them :)scarabin
    • i think the best one is nickle litium..yurimon
    • same cells used in tesla cars!scarabin
    • er you have them already coolyurimon
    • i dunno about nickel lithhium but li-po and life-po are pretty popular. li-ion will always be my fave thoughscarabin
    • how many amp hours you planning?yurimon
    • the tesla reference was about li-ionscarabin
    • around 30-40. most packs on the market for this purpose are around 10scarabin
    • i'd hate to have to drag this thing home on a longer excursionscarabin
    • not sure type of motor this if geared or not... if its not geared you might be able to cycle power back,. but its only like 5% if down hillyurimon
    • I started research while back to make one but on mountain bike. then could fit the time at the moment.yurimon
    • cool. i've got more free time lately so i'm really taking advantage of itscarabin
    • this was the original inspiration
      https://www.youtube.…      yurimon
    • shit they dont have the whole thing up.. sorry they took it down
      i suck lol      yurimon
    • guess it was to much info for their competitors..yurimon
    • wow thats cool!benfal99
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