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  1. V

    New "TSDZ2 Torque Sensor Central Motor"

    Does it make significant difference to upgrade the TSDZ2 firmware from 36V250Wstock to 36V500Wstock? I help out in a local bike shop sometimes and don't want to install the Open Source firmware onto customer bikes, because noone else can service it and I'm not always around.
  2. V

    Extreme spoke angles with big hub motor wheelbuilds

    I just built a 27.5" wheel with a voilamart motor and the angle between the spoke nipples and the spokes looks extremely dodgy and I'm concerned that it spokes will fail at that bend point. Is there any way to improve this with this build or my next one? Would nipple washers improve it? Thank...
  3. V

    New "TSDZ2 Torque Sensor Central Motor"

    When I set my assist level to maximum and turn off the bike, the next time I turn it on again, it will be on ECO. Is there a way to always have it on maximum assist?
  4. V

    Bluetooth BMS with Watt-hour counter

    Hey everyone! I'm looking for a Bluetooth BMS for my ebike battery that can display the consumed Watthours in the app. Being able to reset the counter every ride would be ideal. Is anyone aware of a Bluetooth BMS that can do this? TYVM in advance!
  5. V

    Any DISadvantages from switching my 36V battery for a 48V battery?

    Thank you. Just as a clarification, I'll be building the battery myself in a Reention 91 cell battery case, so it's either 10s9p or 13s7p. With the Samsung 35E, this will be 7p*8A=56A max current, which is more than enough to power a 700W peak motor. I'm not looking for faster acceleration...
  6. V

    Any DISadvantages from switching my 36V battery for a 48V battery?

    Hey everyone. I'm currently running a 36V battery and a Bafang G310 rear hub motor that's rated for 250W, but can handle 700W (according to Grin Technologies). My controller can handle 25A peak at 36V and 48V. It's runs at 31km/h at 42v. I usually ride at 25km/h, but would like the option to...
  7. V

    Reention POLLY DP-6C - 70 cell battery case - how fit BMS?

    Thank you very much! That helps a lot! My version does in fact use the KNB3308A, but there does not seem to be a copper bar under the mosfets.
  8. V

    Reention POLLY DP-6C - 70 cell battery case - how fit BMS?

    Could someone please post a picture and the measurements of a BMS that fits the case? I spent the whole day trying different 3d-printed mockups and can't come up with anything that fits into my case, when it's populated with 70 cells. Even the height of the PCB board + JST connector for the...
  9. V

    Reention POLLY DP-6C - 70 cell battery case - how fit BMS?

    Some AliExpress sellers offer the case with a BMS, but I prefer Bluetooth bms systems that let me see cell voltages on my phone. That gives me the peace of mind that the bms is working properly. The Bluetooth bms would fit if I removed the heatsink. I'll try to come up with a custom heatsink...
  10. V

    Reention POLLY DP-6C - 70 cell battery case - how fit BMS?

    Hey everyone. I bought a Reention POLLY DP-6C battery case for 70*18650 cells. Build quality seems a lot better than the Hailong cases, especially the little tabs that hold the battery box to the mounting-plate. http://www.reention.com/product/detail/99 Unfortunately my 30A bluetooth BMS is...
  11. V

    KT motor controllers -- Flexible OpenSource firmware for BMSBattery S/Kunteng KT motor controllers (0.25kW up to 5kW)

    This might be interesting to you: https://www.archercomponents.com/ (Electronic wireless shifter over bluetooth)
  12. V

    Which high capacity 18650 cell for 250w ebike battery pack with heavy usage?

    https://assets.publishing.service.gov.uk/government/uploads/system/uploads/attachment_data/file/780603/electrically-assisted-pedal-cycles.pdf You are right - there is no legal requirement for maximum controller Amperage, so i could buy a beefier controller for my Bafang G310. And apparently...
  13. V

    Which high capacity 18650 cell for 250w ebike battery pack with heavy usage?

    Ha, awesome bike :) I live in England as well, btw. In Brighton to be exact. I'm a pretty fit cyclist and somehow survive 60 mile days without motor, but i want to do my knees a favor and give them some motor-support on the Brighton hills. At the moment I ride a 8kg cannondale road bike. The...
  14. V

    Which high capacity 18650 cell for 250w ebike battery pack with heavy usage?

    This frame with different components. Rear rack is a possibility.
  15. V

    Which high capacity 18650 cell for 250w ebike battery pack with heavy usage?

    God, I'm researching eBike building for the last months and it surprises me every day, how many misconceptions I have in my head. My rear hub motor is the Bafang G310: https://www.bafang-e.com/oem-area/components/component/motor/rm-g310250dc/ https://www.ebikes.ca/mg310-std.html Controller...
  16. V

    Which high capacity 18650 cell for 250w ebike battery pack with heavy usage?

    Thank you so much for your insight, everyone :) I ride 100km on long days, but I live right in the city center, so I can swap battery packs at home once or twice a day. So I thought the best option was to get 2 packs around 600Wh-700Wh each and cycle them between 4.1V and 3.3V. I would like...
  17. V

    Which high capacity 18650 cell for 250w ebike battery pack with heavy usage?

    That's great, but they have 1100mAh, right? The whole pack capacity just would be too small. 60 cells are already heavy enough - so just getting more cells is not an option in my case.
  18. V

    Which high capacity 18650 cell for 250w ebike battery pack with heavy usage?

    1000 cycles in 3 years would be more than enough. I assume there will be better battery technology out there by that point anyway. Still don't know which one of the mentioned cells would be best for my purpose.
  19. V

    Which high capacity 18650 cell for 250w ebike battery pack with heavy usage?

    Good point. 4.1V to 3.3V then. Will have 2 battery packs anyway (1 getting charged, 1 being used - I can swap every few hours) Energy density is pretty crucial in my case, so the APR18650M1A is not really an option.
  20. V

    Which high capacity 18650 cell for 250w ebike battery pack with heavy usage?

    The controller is 7A continuous, 15A peak. (Which is the legal limit in the EU)
  21. V

    Which high capacity 18650 cell for 250w ebike battery pack with heavy usage?

    I'm building a new battery pack for my food delivery ebike. I's 36V, 250W - and will draw 15A peak. Will do 10s6p, so typical draw per cell will be less than 1A and 2.5A peak. The battery will get a *LOT* of use, so maximum cycle life is very important! Will get charged to 4.1V per cell and...
  22. V

    KT motor controllers -- Flexible OpenSource firmware for BMSBattery S/Kunteng KT motor controllers (0.25kW up to 5kW)

    So which one of the torque sensors on Aliexpress would you recommend for use with the Open Source controller? The Sempu T4? The Eunorau type? thx in advance
  23. V

    KT motor controllers -- Flexible OpenSource firmware for BMSBattery S/Kunteng KT motor controllers (0.25kW up to 5kW)

    How loud is a motor with the custom firmware FOC, compared to decent commercial options like Lishui or Phaserunner? Are they comparable?
  24. V

    Hailong 3 Battery Case?

    there you go: https://california-ebike.com/shop/hailong-3-mounting-foot-new-style/ or but the connectors separately: https://california-ebike.com/shop/hailong3-new-style-case-connectors-set/
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