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  1. M

    BMS wired for charging only

    LOL! Yet, times change. A BMS for the sole purpose of upper and lower Voltage... Currently I balance during charging with those "flying capacitor" boards and working Voltage is monitored by the motor management during riding. Bye BMS board is tempting ;-)
  2. M

    BMS wired for charging only

    I made two packs at the same time, with same components. Only one was completely drained after 2 months, so my conclusion - after checking everything else - is that the BMS was faulty. I understand why you think it is "Odd", let me explain. I don't like chargers, just like TV's, turned on in an...
  3. M

    BMS wired for charging only

    I haven't connected anything yet. I'll ask the supplier if he's sure. Flat lining happened with a separated charge wire BMS (the first picture). Considering it totally drained the batteries, from 48 V to 2.3 V, in only two months, I think the BMS was faulty. I'll open it up one day. Apart from...
  4. M

    BMS wired for charging only

    In the meantime, the supplier confirmed that this, no connections over B- and P-, is the way to go. I have written it down on http://www.vanderworp.org/Battery_Management_System_BMS. It raises a question. I've been understanding that balancing is only done during charging. But if charging is...
  5. M

    BMS wired for charging only

    About the time it took: After receiving the cells, Voltage was very constant over all cells, value somewhere around 3.8 V. 5 months later, I assembled them in a pack, same Voltage per cell and charged to 54.6 V 2 month after that, I noticed a drop to 48 V with main switch turned off 2 month...
  6. M

    BMS wired for charging only

    I still don't understand this completely. I've blown 2 BMSs and collateral destroyed a brand new 13s6p battery because of BMS bleeding. So I would like to give this a try.
  7. M

    A conversion project from A to Z

    Thanks SlowCo, it is a bit contrary to what I assumed. It also means the polarity of the poles passing the sensor will become different. Hope that is not a show stopper.
  8. M

    A conversion project from A to Z

    And an update, http://www.vanderworp.org/PAS_Hack hopefully solves a problem with a PAS that does not fit. Question: Does anyone know if PAS works in in two directions? I think I have to mirror the solution, not sure, no experience, bikes still don't run.
  9. M

    A conversion project from A to Z

    It seems I don't have much time, but the 13s6p batteries are welded and I have updated http://www.vanderworp.org/Sunkko_787A_Hack. Welder works fine within technical limits. Maybe this solution serves others.
  10. M

    A conversion project from A to Z

    Interesting, NL, Netherlands, location does not show up, at least, I don't see it. Well, that is where I live. markz, you were close, it is somewhere between Germany and the UK :-)
  11. M

    A conversion project from A to Z

    Hi! I am new here. In the coming time I want to convert two bikes. I think I know what I am doing but there will probably some pitfalls too. Hope someone here can prevent me from doing stupid things - in time. For others to learn I will write down information and will publish milestones. The...
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