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  1. rudivb

    I bricked my BBS02b

    You could try flashing Daniel Nilsson's custom firmware, it's a "better" firmware anyway. Just follow all instructions closely: https://endless-sphere.com/sphere/threads/bbs-fw-open-source-firmware-for-bbshd-bbs02-controller.117092/
  2. rudivb

    Lekkie buzz bar self extractor 2.5 compatible with standard crank arms?

    In case anyone else finds this, I contacted LEKKIE: They are NOT compatible with stock Bafang cranks.
  3. rudivb

    Lekkie buzz bar self extractor 2.5 compatible with standard crank arms?

    Hey, I found a set of these locally for sale (new), I wonder if these fit with the standard bbshd crank arms, as I don't plan to buy the lekkie cranks. According to the ad they are version 2.5. https://lekkie.tech/product/buzz-bar-self-extractor-v2-5-set/
  4. rudivb

    1 Group has more voltage sag

    Hi, thanks again for all the information you have provided, I have learned a lot. I did open the battery once more and tried to check individual cells with a voltmeter, but it couldn't measure a difference, so I don't know which are the bad cell(s). I also redid some of the wiring of group 1...
  5. rudivb

    1 Group has more voltage sag

    Ah yes, I see now, my mistake, sorry I think that must be 13s14p, I'm pretty sure I counted 13 cells per group. Looking at the videos I made, under max load, the other cells (roughly) drop about 100mV - 120mV, while group 1 would drop about 300mV, which results in a 200mV difference. (At 51V...
  6. rudivb

    1 Group has more voltage sag

    The BMS is not the standard BMS, I upgraded the BMS after a BMS failure, I think it does actively balance the cells. This is the BMS I have now: https://a.aliexpress.com/_EIuDAQj (50A continues 150A peak) Edit: actually there is a feature in the app for balancing, so I toggled that OFF That...
  7. rudivb

    1 Group has more voltage sag

    Hi, thank you so much for your informed response! Yes the variance at rest is indeed very low, I am looking at the voltages right now and currently the difference is only 4mV. I do ride everyday (delivery driver), it's very rare for me to completely drain the battery, when I tour with the bike...
  8. rudivb

    1 Group has more voltage sag

    Hi thanks a lot. I guess the warranty is 1 year, but I could still contact them. I had a failed BMS about 6 months ago and replaced it with a Bluetooth BMS so I don't know what the complete cycle count would be. What would the next plan of attack be? Open the pack and I will have to dismantle...
  9. rudivb

    1 Group has more voltage sag

    Hello, this is a Chamrider 52v37.7ah 14s13p battery with 18650 Samsung cells running a BBSHD. I noticed in the Bluetooth BMS that group 1 at rest often has 0.01V difference from the other groups. And as you can see in the video, group 1 has significantly more voltage sag than the other groups...
  10. rudivb

    Your Creation's Before & After Pics

    Looking at this thread for inspiration for a new build, but I might as well post my delivery bike build, which also became a tour bike lol. Original: Touring
  11. rudivb

    Burned yellow butt splice connector

    I'm not an expert, but it's probably indeed inexpensive material, as it were like the cheapest connectors you can find, won't be using these again I guess.
  12. rudivb

    Burned yellow butt splice connector

    Is that like a butt crimp with solder inside, so after you crimp, you heat it up with a heat gun and the solder melts? I have been using those shrink solder things you heat up, which I haven't really had any issues with:
  13. rudivb

    Burned yellow butt splice connector

    I just got a box with different connectors, but no awg, no amp rating, there is 0 info on it. Will be looking for some proper connectors with the ratings I need!
  14. rudivb

    Burned yellow butt splice connector

    I need to get proper solder equipment and learn to solder at some point with this hobby. :)
  15. rudivb

    Burned yellow butt splice connector

    Often you just pay for a brand name or because somebody imports from China and charges you a premium. All these crimp butt connectors look the same to me, so I thought I could just get the cheapest. But if you mean by what you are saying that I should get some more expensive ones from the...
  16. rudivb

    Burned yellow butt splice connector

    I was troubleshooting my DIY BBSHD 52v bike running @33amp max. Came across these burned butt connectors on the main and I also take a small current for accessories from here. (This was not the main issue, but happy I came across it) Before I've always been using those heat shrink with solder...
  17. rudivb

    Bafang BBSHD dies randomly, please help!

    Sorry for not updating the post, but finally I bought a new (bluetooth) BMS which has completely resolved the issue! Been riding for months now without any problems. :)
  18. rudivb

    BEWARE OF EBIKE FAKE CAPACITY AND CELLS BATTERY

    Like with the majority of the products and sellers on AliExpress be cautioned and do proper research first. I've been a customer of AliExpress for probably 10+ years with mostly good experiences including the purchase of batteries.
  19. rudivb

    BBS-FW: Open Source Firmware for BBSHD/BBS02 Controller

    Hi @Travis Have you considered that you might have a short in your throttle/wiring or some other electric issues with the wiring/throttle, hence the 30h error from before? Maybe water damage?
  20. rudivb

    BMS 14S 60A/80A BT - Where to buy?

    Hi, I don't really remember, maybe 10 days? Pretty quick for AliExpress standards. Have you looked on Amazon? You might find the same BMS with faster shipping but a higher price.
  21. rudivb

    Jbd Bluetooth BMS, parameters overwhelming, help or a guide online?

    Anybody?
  22. rudivb

    BMS 14S 60A/80A BT - Where to buy?

    Bought the 50A version here recently, they also have 60 and 80: https://a.aliexpress.com/_Ejighfx Loads of other vendors/places where you could buy the same product, but this JBD BMS seems a good choice.
  23. rudivb

    Jbd Bluetooth BMS, parameters overwhelming, help or a guide online?

    So I figured out setting the nominal voltage number to 45ah, seems to be better, now it shows 81% at 55.8v instead of 100%.
  24. rudivb

    Jbd Bluetooth BMS, parameters overwhelming, help or a guide online?

    Hi, So I had battery problems and decided to get a new BMS. I'm happy that everything went well and have the JBD Bluetooth BMS up and running. The parameters are a bit overwhelming to me, so some help would be appreciated or if there is some sort of guide online? Anyway to get to the main...
  25. rudivb

    Noob replacing BMS question C-

    Thanks both for the confirmation!
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