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  1. C

    Low temperature solder paste (138c)

    Thank you for your reply. I’m planning to use a 100w solder. I have a battery spot welder, so I’m only use solder for the positive pole of the battery, I will use the spot welder on the negative pole.
  2. C

    Low temperature solder paste (138c)

    Thank you for your reply. It clarified my hesitation from using it.
  3. C

    Low temperature solder paste (138c)

    Has anyone use this kind of solder paste for joining 18650 cell? The solder paste melt at 138 degree centigrade, so it’s not as high as normal tin solder. I’m thinking about using this type of solder paste to connect fuse wire to the copper busbar (flattened copper pipe). Any help is...
  4. C

    What wire to use as a fuse wire?

    Thank you for your reply.
  5. C

    What wire to use as a fuse wire?

    Has anyone have any information about what wire to use as a fuse wire? I’m building a 20S30P battery pack from old recycled laptop batteries, so I decided to use a tesla style fuse. I can’t find any fuse wire in Indonesia, is there any wire that I can use as an alternative? I’m looking for a...
  6. C

    Low torque with a strange noise on start.

    Thank you for all of your reply. It turned out that the problem was the order of the phase wire connection, pole pair number and hall angle setting. The bike runs smoothly now.
  7. C

    Votol EM-100 & EM-150 controllers

    I finally found the solutions. I contacted a friend of mine who is a ebike technician. He set the parameters of my bike remotely. It turned out to be the problem with the phase wire connection, number of pole and hall angle. I had to swap the position of the phase wire and changing the hall...
  8. C

    Low torque with a strange noise on start.

    My setup is hub motor QS 205 2000W 72v, Votol em100 and 20S21P li ion. The bike have a very low torque and strange noise on start. There is a stuttering acceleration if I give throttle from stand still. When the bike is running, everything is smooth. I've tried to ask in votol em100 thread, but...
  9. C

    17 inch motorcycle rim with bicycle hub

    Thank you so much for your reply. I finally able to choose the correct spoke length using spoke length calculator.
  10. C

    Votol EM-100 & EM-150 controllers

    I have exactly the same problem. The bike will have a strange noise and stuttering acceleration at the start. But when it’s running, all is smooth. Can anyone here have any suggestions or solutions? Any help is appreciated...
  11. C

    17 inch motorcycle rim with bicycle hub

    I’m building a reverse trike. I want to lace the 36 hole bicycle hub with a motorcycle rim. The plan is to use bicycle spokes for the rim. I know from searching this forum that i need to have some spacer to get the nipples to seat properly in the motorcycle rim. But I can’t find info on the...
  12. C

    Votol EM-100 & EM-150 controllers

    Do you know which port the brown wire that suppose to be park function is located?
  13. C

    Votol EM-100 & EM-150 controllers

    I already sent the firmware. But I can’t guarantee that it will work. I got it from a qs motor representative.
  14. C

    Votol EM-100 & EM-150 controllers

    I send the firmware to your email.
  15. C

    Help with stray voltage

    Thank you so much for your solution...
  16. C

    Help with stray voltage

    Thank you for your reply. My battery is placed within the frame and also have 3 different place that is connected at every parallel cell group, so it becomes one big battery pack. There is a lot of cables and it’s hard to take the battery out without have to redo the cabling.
  17. C

    Votol EM-100 & EM-150 controllers

    This morning something marvelous but mysterious happened. When I import new parameters file to the controller, all pf the sudden the bike is normal again. Even though all the parameters match the previous setting. It’s weird, but i’m glad that it all worked out. Has anyone here ever experienced...
  18. C

    Throttle problem

    Thank you for your reply. The bike last controller was burned because of a pinched main battery wire positive to the frame. I repair the cables and also replaced with a new controller (same type as before Votol EM100.) The battery is 20S21P li ion from recycled laptop batteries that has been...
  19. C

    Votol EM-100 & EM-150 controllers

    I have a problem with my Votol EM100 controller. When I give it a full throttle, the throttle open up just a little bit, or sometimes it starts normal for a few second and than the speed goes down to a very low speed. My setup is qs205 2000w 72v with votol em100 I have check the throttle...
  20. C

    Throttle problem

    My setup is QS205 2000w 72v hub motor with Votol EM100 controller. The problem is when i give it a full throttle, it’s only open the throttle a little bit, or sometimes is start well for a few seconds and then the throttle seem to wind down to a very low speed even when i give it a full...
  21. C

    Help with stray voltage

    My multimeter is Klop DT 9205A. It Chinese brand.
  22. C

    Help with stray voltage

    Thank you for your reply. I’ve tested the resistance between the frame and the battery, the resistance is 0.5 to 0.6 mega ohm. I have not connect the controller or the hub motor. Is there anything that should be fixed?
  23. C

    Help with stray voltage

    The bms is not mounted on the frame and it is well insulated. The contactor is mounted to the frame, but when I dismount the contactor, the voltage remained the same. I don’t use ground on the frame. Sorry for the double post. Thank you for your reply.
  24. C

    Help with stray voltage

    Thank you for your reply
  25. C

    Help with stray voltage

    Thank you so much for your reply. I will check the amp current flow...
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