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  1. G

    NiMH cell replacement in a pack

    Sparta ION m-gear
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    NiMH cell replacement in a pack

    I have a used ebike with NiMH battery. After taking the battery apart I found a bad cell (0V) in the 20 cell battery, the rest is at 1.23V. What are the rules for changing one cell in a NiMH pack? There is no BMS so I guess the new one should be a higher capacity cell than the rest and I am...
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    bluetooth BMS?

    I have two questions: 1. Does anyone have bad experiences buying from LLT power? https://www.lithiumbatterypcb.com/ 2. Would it be a problem to have 4 of these bms's next to each other? How easy it is to switch between them when trying to communicate with one and then the other and so on. Plan...
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    800W Q128c commuter build

    You will have both in and out elbows, otherwise you cannot cross them.
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    s12s slcd3 problem

    It turned out that it was all my fault, as I ordered a 72V display. Obviously the description of the item was quite misleading, but still I should have read it better. With the 36/48V display the system works like a charm.
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    Gearbest Experience

    Yes, that is my experience. Afterwards, I read several similar stories about Gearbest, you can do a search on Google, and will see them. I have no idea how PayPal hasn't kicked them out yet.
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    What is best ebike lighting available?

    The above-mentioned lights are only 8$ now. http://www.aliexpress.com/item/DC12V-80V-20W-Black-LED-Headlight-Handlebar-Light-Waterproof-Lamp-Universal-for-Motorcycle-E-bike-for/32501138512.html?spm=2114.01010208.8.9.kdjnL6
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    Gearbest Experience

    I wouldn't recommend buying a box of matches from Gearbest. It is completely okay with them to not send you something, and to not tell you that they haven't sent it, and to not give back your money, just some credit that you can use on their site. edit: on the other hand nkon.nl is a brilliant...
  9. G

    Couple Quick PAS Mounting Questions

    Hot glue is a beautiful help. Switching the display to reverse PAS mode was also easy.
  10. G

    s12s slcd3 problem

    I did further experimenting, and with the voltage under 38V the whole system works perfectly. Just over 38V it produces cutouts. I am a beginner, but it screams of LVC. These two videos show the display after boot up with the battery just over and just under 38V. https://youtu.be/v4Imsnk6rG0...
  11. G

    s12s slcd3 problem

    This is what happens when I turn it on, and the battery is around 39.2V: https://youtu.be/yyuY73K0iSs This should show a cutout, unfortunately, the display is too dim to see anything: https://youtu.be/CLNyolJCOi0 I have another idea, and I would need someone to check their signal voltage. When...
  12. G

    s12s slcd3 problem

    That's how my setup shows the correct speed. When P2 was 0 it did not show speed without power, and other values just gave wrong speed values. I tried different C5 values, but it seems that it does not affect throttle, probably only works with PAS. C12=0 was experimental but, unfortunately, did...
  13. G

    s12s slcd3 problem

    It was only the speed sensor that I managed to make work. The cutouts persist. Looking at the pretty dim display, it seems it should not be low voltage protection (the battery meter shows a full battery). What other protection can completely turn off the display? I would really appreciate some...
  14. G

    s12s slcd3 problem

    In another thread, I found that a speed sensor is a must to avoid cutouts, so I installed it. After hours of changing settings, it is working. P2 (phase number) should be set to the correct number even if you have a speed sensor installed. Otherwise, it only works when the motor is under power...
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    s12s slcd3 problem

    The battery is perfect. Just checked the cells, and there is a 0.002V discrepancy between them.
  16. G

    s12s slcd3 problem

    The original problem was solved. The PAS wasn't working, so P4 had to be changed to 0. However now I am facing a different problem. I don't have a voltage meter on the battery yet, but it feels like the display cuts out at around 40V first. It can be rebooted, but time and again it will cut off...
  17. G

    s12s slcd3 problem

    No. It's a 18650 pack.
  18. G

    s12s slcd3 problem

    Thanks for the ideas, I will try them out next, when I go out. Today's test drive did not solve anything, the speed sensor was not enough. The thing I quoted from you is important because there is no BMS on my battery (and it is a monster at 31.9Ah), and something definitely cuts out the screen...
  19. G

    Couple Quick PAS Mounting Questions

    I bought the exact same thing. It only works one way. For me, it means I cannot use it, as the magnet disc does not fit under the chainrings.
  20. G

    s12s slcd3 problem

    Thanks! It was the P4 function, I forgot that I changed it. After the maiden voyage, there is another problem, though. It seems the controller cuts out at 39V. I have a huge battery pack (s10p11), so sag should not be big, and although the temperature is pretty low (3°C) it should not be a great...
  21. G

    s12s slcd3 problem

    Hello all, I have a strange problem. When I tested my configuration about a week ago, the throttle worked OK. Now when I am trying to assemble it, it does not. Parts: S12S controller, S-LCD3 display, Bafang CST motor, 36V battery pack (18650, 31.9Ah). The original problem was solved. The PAS...
  22. G

    Newbie, 48V battery pack not charging

    Info about the battery, from the link in the OP: Battery Model 48V 20Ah Nominal Capacity (AH) 20ah Nominal Voltage (V) 48V Source Resistance (mΩ about 40 Cell Specification 3.7V 2.3AH 18650 Cell Combination 9-parallel 13-series Cell Quantity (parallel*series) 117 Discharge Cutoff Voltage (V)...
  23. G

    JP spot welder

    Isn't it a problem that all the juice from the pack has to go through that bottleneck, that I highlighted? How thick is the nickel you're using?
  24. G

    JP spot welder

    Hi Riba, an update on the timeline would be appreciated.
  25. G

    JP spot welder

    Great news.
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