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  1. C

    Wrong charger voltage BMS gone ?

    ''I did not realize you had already measured all the groups. Normal operating voltage of a lithium cell is 3.0V to 4.2V, The typical BMS shuts off the battery if any group is below 3V, That's why you have no power at the output.'' what did you mean about the BMS shut off the battery? when I...
  2. C

    Wrong charger voltage BMS gone ?

    Yeah! I let the charger aside its risky unit, I will look for one working and test the suggestions which posted here thanks for the help
  3. C

    Wrong charger voltage BMS gone ?

    This reply full of useful instructions, I will take them into consideration in further repair thanks bro
  4. C

    Wrong charger voltage BMS gone ?

    How to check the BMS if still functioning or gone ? If I replace the faulty ones with new one from another brand and balancing altogether assuming the BMS is still working, what the consequences could be ?
  5. C

    Wrong charger voltage BMS gone ?

    Yes, it's 7S 4P this charger is weirdo Yesterday when tested it was 33V, right now 38 the charger labeled 24V the value of actual battery voltage is 10.97V the two fuses checked are ok
  6. C

    Wrong charger voltage BMS gone ?

    In fact, the charger come with the ebike it was working before correctly what happened it stopped working due to cycles of charging for unknown reasons. For the architecture of the pack, it's difficult for me to determine exactly which pack is I attached clear picture of wiring, the total cells...
  7. C

    Wrong charger voltage BMS gone ?

    I think it's 5s pack battery, I'm newbie, correct me if I'm wrong by the way is it normal charger give 33V even it's 24V after testing the battery voltage 12 of 28 cells seems to be bad what could be the problem the charger, the BMS or faulty cells any idea ?
  8. C

    Wrong charger voltage BMS gone ?

    I plugged the charger which labeled 24V to the ebike battery but no response on the LED when I disassembled it, I found the BMS as shown in the picture after I did the charger test the output was 33V could we say I screwed my battery ?
  9. C

    Battery pack malfunction

    I isolated The BMS the red charging constant the culprit now is being revealed
  10. C

    Battery pack malfunction

    I don't have a working BMS ,how to test the resistance of the cells ?
  11. C

    Battery pack malfunction

    Here is the result
  12. C

    Battery pack malfunction

    I Measured the voltage of battery pack is 36V without the fauly one group
  13. C

    Battery pack malfunction

    Sorry for misunderstanding when getting shop, I will measure the total voltage and post the result.
  14. C

    Battery pack malfunction

    The voltage is 4.1V in fact I balanced them with the original ones
  15. C

    Battery pack malfunction

    I bought a second hand bike ,after plug charger the green red cycle blinking endless I dissambled the battery I tested all the components fuse cable connection are ok but the the three cells in parallel were defective I tried to replace them with other brand with same voltage ,the issue still...
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