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  1. Tomblarom

    New mini 7S-14S 30A BMS with switch, temp, BT, UART

    I needed a small BMS for a project and discovered, that JBD made a new ultra compact smart BMS! It's only 63*52*12mm and has has all these common features! 7S to 14S (automatically configuring) Continuous 30A, Peak 90A (for 1s) Type: Li-Ion (3,7V) or Lifepo4 (3,2V) Size: 63*52*12mm Mosfets...
  2. Tomblarom

    Scientific analysis of BBSHD! Motor characteristics, Winding pattern, ...

    I just stumbled across this highly scientific paper about the Bafang BBSHD. It features a lot of need greedy details about the characteristics of the motor itself. I can't exactly interpret them, but wanted to share them here. :)...
  3. Tomblarom

    ImPow Rectifiers - Discussion & CAN protocol

    I came across these chinese chargers and the seller gave me the CAN protocol. I signed no NDA, therefore I want to share it. See attached. More technical details like dimensions, datasheets, manual, power: https://endless-sphere.com/forums/viewtopic.php?f=14&t=114784
  4. Tomblarom

    Emerson/Vertiv R48-series CAN programming?

    Currently I'm really into getting my hands on an R48-1000e3. Highly compact and even smaller than an Eltek Flatpack S. Unfortunately I wasn't able to find somebody that's willing to share the CAN protocol with me.. I read through the Eltek thread and I wish we can start something similar for...
  5. Tomblarom

    Overview: best rectifiers for charging (voltage mod) - Eltek/Delta/Huawei/Emerson/Vertiv

    I couldn't find anything like this and made this for myself to compare common telecommunication PSUs / rectifiers. Trying to update this frequently. Used datasheets attached. Enjoy! Eltek CAN / I²C: https://endless-sphere.com/forums/viewtopic.php?f=14&t=71139 Model Power Size...
  6. Tomblarom

    Enforcing aluminium frame with carbon fibre?

    I bought a cheap full-suspension frame for Brose (Bulls E-Stream Evo-TR-2 2019) which I'm currently working on, to install the even more powerfull Bafang M600. Meanwhile I saw at least 3 independent reports about cracking frames at the exact same spot. Is it possible to enforce the aluminium...
  7. Tomblarom

    Rewinding of Bafang Ultra G510/M620 stator?

    I toasted the stator of my ultra and wanted to use this opportunity to learn more about motor winding. I assume, that I slowly killed it during my 10.000km of usage. Powering 3500W and running too hot over a longer period of time, multiple times. Often experienced slow downs thorough the...
  8. Tomblarom

    Custom fiberglass / carbon frame battery case

    Hello there, I'm planning to build my own case to use as much space as possible. I ordered 21700 cellholders and was able to fit 112 cells (14S8P). I'm riding a Bafang G510 + X1 3500W paired with DP-9 18650 14S6P VTC6 in my converted Haibike: I want to build an fixed case, that is similar to...
  9. Tomblarom

    [Project] Bafang ExtensionBox for BBSxx (Light, Brake, TurnLights, CopButton, HandlebarSwitches)

    Because I live in a part of Europe where you are not allowed to ride unregistered bikes over 25km/h, I needed some kind of "protection". At the same time, I wanted to have brake-, turn- and front-light control, to be more visible to cars (and for fun, haha). My Bafang DP-18 display has a light...
  10. Tomblarom

    Bafang DPC-18 - Adapt settings using UART?

    Hey! I'm looking for commands to adapt a few settings in the display. I'm currently implementing this copbutton (https://endless-sphere.com/forums/viewtopic.php?t=94850) and was wondering if anyone sniffed commands to set things like max speed or max current? There's not much development on the...
  11. Tomblarom

    BBSHD Controller not programmable

    I ended up frying my BBSHD Controller, while playing around, getting the wiring for this COP Box right. Then I recently received the new one, ordered from Aliexpress. For some reason I'm not able to use the programmed settings. I'm flashing them, but when I try to ride my bike it's back to the...
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