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A Good Place to Buy BMS's? Particularly a 14S BMS

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    A Good Place to Buy BMS's? Particularly a 14S BMS

    Hey guys I'm having a lot of trouble finding a 14S BMS.

    I need one 14S BMS and two 10S ones for some bike battery packs I'm working on.

    I found this one for a 10S (is it good)?

    http://www.batterysupports.com/36v-3...bms-p-266.html

    But haven't had any luck with a 14S one. Do yall have any suggestions?

    Thanks

    Phil

    #2
    Here are a bunch to choose from: https://www.aliexpress.com/wholesale...chText=14s+bms

    I use a BMS rated twice the max current that I will draw. For example, I may draw up to 50A continuous so I use a 100A BMS. That being the case, I would use this one: https://www.aliexpress.com/item/SuPo...e-da815eafe76f

    What continuous and burst current do you anticipate drawing?

    Look at this bad boy: https://www.aliexpress.com/item/SuPo...e-8f51395ed2cc

    Here is one from a domestic seller: http://www.ebay.com/itm/BMS-PCB-PCM-...8AAOSw9N1VvRfl

    When I ordered mine, they came from China and it took about 6 weeks before they came, but they have been bombproof ever since I put it into service. As I recall, they were about $100 for each 72V 100A BMS.

    I have vaporized about five BMS units drawing 40A continuous and 82A bursts through 50A BMS units. When they fail, they burn. Having a fire in your battery is alarming and it is a sickening smell, so it is best to overbuild it in the first place.
    Last edited by commuter ebikes; 04-22-2017, 06:27 PM.

    Comment


      #3
      Just throw this out there.. or.. no BMS! hehe. Its scary not having a feedback loop as to what state your cells are in and for something to happen with smoke and fire. You just have to "trust" the BMS is doing its job and not damaging the nice shiny cells you've just spend a crapload of money on

      There are ways and means of monitoring, balance charging and bulk charging (CellLog, iMax B6/iCharger, JST balance wires). I'm still learning all about it also. I like both ideas (no-bms and bms packs) they both have their pros and cons
      ++

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        #4
        check the manufacturers:
        http://litechpower.com/518v14spcmbmspcb/
        http://bestechpower.com/518v14spcmbm...erbatterypack/

        I think they have all you need!

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