Recent content by rudivb

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/

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

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/

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...

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...

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...

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...

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...

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...

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

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.

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:

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!

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

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...