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  1. 1

    Need advice on a honda c70 passport build

    I have a C70 with a QS205 (I believe 5T?) and a 60v battery from an ebox mini motorcycle, powered with originally a sabvoton and now a Fardriver. 60v with no field weakening gets me just shy of 40mph. Acceleration at 60a is brisk, acceleration at 120a (which I didn't realize I was doing; my poor...
  2. 1

    12ft question about commercial EV motors and controlling them

    I'm pretty familiar with ebikes, escooters, etc. Get a motor, get a brushless controller, hook up the hall sensors and phase lines, hit "learn", get the magnet count and whatnot put in the controller and you can be pretty sure that the result will move down the road. What I can't confirm is...
  3. 1

    Dynapack battery BMS wake up? Motocompacto battery dead

    send it to me before it goes in the dumpster, lol. I'll do what I'm doing with mine; new controller, new BMS in the battery, all aftermarket electronics but as close to stock appearance as possible, and the ability to use a range extending second battery. Just wanting on my VESC to show up. I...
  4. 1

    Dynapack battery BMS wake up? Motocompacto battery dead

    Bypassed the fuse, still no output from the battery. At this point I'm probably going to remove the factory BMS, put an ANT Smart BMS on it and replace the stock controller with a VESC.
  5. 1

    Sabvoton 72200 stuck in reset

    Bumping to say I'm having the exact same issue. Cannot program no matter what. Have sent an email to sabvoton support, I'll update this thread and my thread on the same issue once I hear back.
  6. 1

    Dynapack battery BMS wake up? Motocompacto battery dead

    I just ordered a new battery for mine. Still going to try fixing the old one. On the fence about attempting a parallel battery set up when the new one arrives, using a battery Y-connect module (which I believe keeps the batteries from charging each other) like this one...
  7. 1

    Dynapack battery BMS wake up? Motocompacto battery dead

    This is the path the positive current takes from the string pos to pack pos, passing through the SCP and the two parallel FET packages.
  8. 1

    Dynapack battery BMS wake up? Motocompacto battery dead

    This is my concern as well.
  9. 1

    Dynapack battery BMS wake up? Motocompacto battery dead

    I wonder if this is because there is still a constant flow of current through the "heater" portion of the fuse at a fraction of an amp?
  10. 1

    Dynapack battery BMS wake up? Motocompacto battery dead

    I do not endorse doing this in any way because it defeats safety features of your e-bike's battery, but I'll be (ok, my friend who has a hot air station will be) desoldering and jumpering T1 to T3 on mine, taking the T2/heater section out of play entirely. That way I can then probe T2 on my own...
  11. 1

    Dynapack battery BMS wake up? Motocompacto battery dead

    I'll be mildly surprised if Honda accepts a battery that has been disassembled for a warranty replacement.
  12. 1

    Sabvoton not allowing configuration

    Mine is from Sabvoton.net, the invoice says "MQCON Science and Technology Co., Ltd", it does not have the two display wires like AGS has. Came with the UKC1, bluetooth, and USB cables. Honestly I had no idea that there were different vendors for slight variations of this. The app and PC program...
  13. 1

    Dynapack battery BMS wake up? Motocompacto battery dead

    Oh. Crap.
  14. 1

    Sabvoton not allowing configuration

    Bought a Sabvoton SVMC72150 and installed it in my bike with a 60v battery and QS hub motor. Powers on, works great, motor spins the wrong way. Go into the settings on the UKC1 display, power cycle the controller, motor still spins the wrong way. Ok, weird. Unplug the UKC1 and plug in the power...
  15. 1

    Dynapack battery BMS wake up? Motocompacto battery dead

    Sorry I forgot about this thread. If you take a look at your red wire coming off the pack, look at the huge trace that goes to it. That trace goes to the right to two FET packs, and then from there it goes to a rectangular surface mount device with three legs. This is the fuse, but it's not a...
  16. 1

    Dynapack battery BMS wake up? Motocompacto battery dead

    There are two fuses on a motocompacto. The one you can see on the battery leads is a normal automotive style blade fuse. The second one is inside the battery case itself. This one will blow due to an over-current condition like a normal fuse *or* the microcontroller inside the battery can kill...
  17. 1

    Dynapack battery BMS wake up? Motocompacto battery dead

    That makes a lot of sense. I hope you're wrong about the BMS triggering it though, because then replacing it will just result in another instant blow and means the battery has effectively bricked itself. I may just use a rework station to remove the fuse for now and bridge the main terminals...
  18. 1

    Dynapack battery BMS wake up? Motocompacto battery dead

    Update: I traced the path from pack+ to battery+ and found this 30a surface mount fuse in between them https://www.dexerials.jp/en/products/surface-mounted-type-fuse/sfk0630.html Between VP and the fuse I get continuity, when I measure VP to the other side of the fuse I get pack voltage. When...
  19. 1

    Dynapack battery BMS wake up? Motocompacto battery dead

    It's a smart BMS. The CANBus is used to stream State of Charge to the dashboard, I don't believe it does anything else. The scooter will actually run without the canbus signal it just flashes a constant error message. If I hook up an arbitrary 36v battery to the battery connector the scooter...
  20. 1

    Dynapack battery BMS wake up? Motocompacto battery dead

    Hey guys. I have been working on adding a range extender in the form of a parallel battery on my Honda Motocompacto and goofed up and hooked it up in parallel without a balancer/balancing like an idiot. After a powercycle or two the internal battery in the Honda stopped outputting any voltage...
  21. 1

    KLS-N + MY1020D nonsense

    I verified my hall sensors are all triggering, and in the proper 123 101 100 110 010 011 001 order. So, at least that much is good. I then moved on to that flow chart. With the config in the top middle, it was stuck. Moved to the left, stuck. Moved one down, stuck. Moved to the lower-left...
  22. 1

    KLS-N + MY1020D nonsense

    I should be able to quickly confirm this by looking for a specific pattern of hall sensors switching on and off as I manually rotate the motor, right?
  23. 1

    KLS-N + MY1020D nonsense

    What's odd is that it runs FLAWLESSLY smooth at specific RPMs... in one specific rotating direction. It feels like a car with a coil going bad. Intermittent missfires at specific RPM/load scenarios. I opened up the motor and moved the sensors from their mechanically advanced position to a...
  24. 1

    KLS-N + MY1020D nonsense

    Hi all. Currently messing with various EV powertrains in a cheap Amazon minibike before committing to a street-legal conversion. Bought a VEVOR 48v motor+controller combo. Very amusing. paired it with a 5ah battery I built out of a Honda Insight 5ah 12s lithium sub-pack. I then bought two...
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