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  1. S

    Bafang BBSxx - fault finding and fixes

    Update about my problem. I took the advice of using one grease on the whole unit instead the black and white stuff, as explained by this site: https://electricbike-blog.com/2015/12/23/mobilgrease-28-bbshdbbs02-because-a-good-mid-drive-is-better-seen-and-not-heard/ The motor sounds much better...
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    Bafang BBSxx - fault finding and fixes

    HI folks! I am currently getting some high mechanical rattling sound from my BBS02 motor. The sound is worse during low motor load. It's a bit less during high load, but it does not sound good, and it is getting worse. I have already opened up the motor and could not find any visible problem...
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    Bafang BBSxx - fault finding and fixes

    Thanks for the soldering tips Ivanovitch_k! My soldering iron suck, but luckily i have a good one at work. I found a place were they sell phosphoric acid. Sounds better than coke. But let see what I end up buying. :) The steel wool hack have actually hold up my commute today. And...
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    Bafang BBSxx - fault finding and fixes

    Thanks for your helpful replies Ivanovitch_k and tomjasz! We had a long winter in Norway as well, so this has probably been the problem. I will try to find some phosphoric acid or try it with some sandpaper. I also saw on the internet that baking soda mixed with water could clean battery...
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    Bafang BBSxx - fault finding and fixes

    You were right tomjasz. It is the battery terminals. I have tried to clean the plugs. What is the best way of cleaning such terminals? Looks almost like there is some parts missing at the minus terminal (left terminal), or maybe just filled with corrosion. I had some dielectric grease, but...
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    Bafang BBSxx - fault finding and fixes

    Yeah, i agree. Somehow the shark case was also very stuck when I tried to get the case loose from the holder. Wonder if it can have something to do with the problem. Anyway, after opening up the battery case to check the cells voltage, the battery actually work again. But I'm afraid the problem...
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    Bafang BBSxx - fault finding and fixes

    Motor is first version of BBS02, I get the same problem on two different motors (bought 2015 and 2016) and two different displays. This is the battery https://www.greenbikekit.com/e-bike-lithium-battery/li-ion/48v11-6ah-e-bike-frame-battery-with-5v-usb-output.html I really wonder how this...
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    Bafang BBSxx - fault finding and fixes

    I have now checked all battery cells, and they were perfectly balanced at 3.99V. I also tried the two terminals between the battery case and holder. It was very difficult to get the case lose from the holder. And after re installing it, the bike lasted longer than normal. So I'm starting to...
  9. S

    Bafang BBSxx - fault finding and fixes

    Yeah. That is a good idea. But I guess I test most of the connectors when attaching a new display module? I found a new controller ( I had several controllers failure due to what I belive to be rain/snow/salt issues). I will try to change it tonight. Currently I can bike for 2-3 minutes before...
  10. S

    Bafang BBSxx - fault finding and fixes

    Thanks for the reply! But should I not notice this battery issue with a multimeter? I first suspected the battery, but I can't figure out how this error can be transmitted from the battery to the controller, when it is only connected with two leads (50 V). If the display shows 0 battery power...
  11. S

    Bafang BBSxx - fault finding and fixes

    Hi Does anyone recognize the following problem? While biking I will suddenly loose my motor power. Before this the battery indicator will normally loose a step before suddenly going down to zero. Then the battery symbol will starts to blink (as shown in the attached video). The battery shows...
  12. S

    Multiple BBS02 (a) controller failure due to wet/cold weather?

    Ok, so you have sealed the stator part of the motor as well? I have yet not had any problems in the stator part. I guess the seam have been tight enough?
  13. S

    Multiple BBS02 (a) controller failure due to wet/cold weather?

    Yeah, my plan was to seal of every possible hole so that water never will get into the motor or controller. So I have also sealed of the drain holes. An added challenge here in Norway/Oslo is salt water. The roads are saltet to avoid ice in wintertime. Though some of these controllers are made...
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    Multiple BBS02 (a) controller failure due to wet/cold weather?

    Good point. I found the drain holes so I have put some silicone sealant here as well. I guess sealing the controller 100% should work in theory. Added a picture. Does not show the details that well, but the red highlighted areas are the places I have focused on when sealing the unit .
  15. S

    Multiple BBS02 (a) controller failure due to wet/cold weather?

    I just found out that the first controller that went bad, suddenly works again. I guess it has dried out or something? Anyway, i'm going fit it back on the bike. However, this time i will put silicon sealant around the controller to try to avoid water to get in. Let me know if anyone have any...
  16. S

    Multiple BBS02 (a) controller failure due to wet/cold weather?

    Hi and thanks for the replies! Ok, so the BBS02B still has problems (I know this does not fit the bbs02A motor). Do you think it would be possible to do some waterproofing with some kind of sealants? I had not thought about the possibilities to use a third party controller. I guess you need to...
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    Multiple BBS02 (a) controller failure due to wet/cold weather?

    Hi I have now had three BBS02 A controllers (first version) that have gone bad. They all have started to give med 30H error message. (less than a 2 years period.) I suspect that this is due to wet and cold weather, since the failure have always been occurred during such weather periods. I'm...
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    Bafang BBSxx - fault finding and fixes

    If you experience the same symptoms, did Paul mention the problem that causes it? I would also be interested to hear if someone in London can fix this. I'm based in Norway. My reseller (greenbikekit.com) has not mentioned something about this. Just that i can get the spare parts I need.. Not...
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    Possible to power headlights with the Bafang C965 / BBS02

    Yes, I was also thinking that the power would probably be pretty limiting. I'm therefor just thinking of using the battery with voltage converter. Would be nice though to control the lamp form the controller..
  20. S

    Bafang BBSxx - fault finding and fixes

    HI folks. Great thread since it has given me some ideas of why my BBS02 makes noise. I get this grinding noise when the motor has a load. I even feel the noise/grinding through the pedals. I'm suspecting that I have the loose rotor problem discussed earlier in this thread (missing o ring?)...
  21. S

    Possible to power headlights with the Bafang C965 / BBS02

    HI Have anyone tried to power some headlights with the BBS02 / C965 system? I guess some of the pins gives the display 5 volt or something, which should be enough for a led light. Question if the cords can deliver enough power.. Thought I should ask here before I try it out. Thanks!
  22. S

    Best "bottle" battery case?

    HI Someone stole my ebike yesterday (bafang bbs 02 750..). So I need to buy a new one. One that bike I had the following battery case https://bmsbattery.com/ebike-battery/684-48v116ah-bottle-09-panasonic-battery-charger-battery.html But now I see it is possible to buy a new type of battery...
  23. S

    Hub motor maintanance (q100, q85)

    Hi After nervously listening to a partially squeaking wheel, is it a good idea to do some maintenance on these hub motors? Like adding lubricate on the gears? It may be that the source of the sounds is something else. I haven't really managed to localize the sounds. It goes off and on with some...
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    cute q100, 24v versus 36v and hall sensors support?

    You should be able to use a thumb throttle with above wrist gear shifter. http://www.bmsbattery.com/accessory/231-thumb-level-throttle.html They also have one with battery indicator. Are you sure the front stand will fit the folding bike?
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    cute q100, 24v versus 36v and hall sensors support?

    Wow, so you can actually drive the q100 at 900watt for short moments. What do you think is a safe continues power handling for the q100 and the q85? I have just ordererd more lipo batteries. Found some cheap 4s on ebay. Thinking of first trying the q100 at 10s. But i have also ordered a 36volt...
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