cells inside a 36v 13a battery help please

Discussion in 'Electric Bikes' started by billym0404, 18 Feb 2018.

  1. billym0404

    billym0404 Active Member

    Location:
    durham
    so i keep looking inside battery's. now as i understand it using 3.7v 18650 2600mah cells. i should use 10s5p setup. so 50 cells. every picture i look at of a 36v 13a battery even though it says 10s5p contains more than 50 cells

    every one i look at is like this, so what am i missing please. wht do all the ones i look at contain more than 50 cells. ass you can see by the picture this on contains 55 cells yet it says
    36v13ah(10s5p 18650 2600mah )

    help please
     

    Attached Files:

  2. Ajax Bay

    Ajax Bay Veteran

    Location:
    East Devon
    10 series (ie giving you 37v nominal) and 5 parallel (giving you a capacity of 5 x 2.6Ah = 13Ah). Perhaps they're not confident of achieving 3.7v in all the cells (and there'll be connection losses) so 11 x 3.7 allows for that and to make the spec with assurance. There's a fair bit of variation in medium quality 18650 batteries and a steady (though very gradual) drop-off as the battery pack is in use. If it's a couple of volts over the motor will be entirely content. If it's under 36v, motor will be less 'happy'.
    HTH
     
    Last edited: 18 Feb 2018
  3. OP
    OP
    billym0404

    billym0404 Active Member

    Location:
    durham
  4. screenman

    screenman Legendary Member

    Out of interest how are you going to solder them all together, I have tried in the past without success, as for getting the factory tabs off that was not an easy one either.
     
  5. OP
    OP
    billym0404

    billym0404 Active Member

    Location:
    durham
    ive bought a spot welder.
     
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