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  1. R

    BBS02 Hall sensor problem

    Fixed I think. With excellent youtube video help from here Despite peeps having never experienced a hall sensor failure it was a hall sensor. Used a hall sensor from the kit I had bought from ebay in first post. removing and replacing the faulty hall sensor in the old board. Haven't fully...
  2. R

    BBS02 Hall sensor problem

    Found the answer, I think here Looking closely through a magnifying glass i one side is beveled. So will solder facing same way as original,
  3. R

    BBS02 Hall sensor problem

    Hi all, have error 08 on my Bafand BBS02B. Ordered new hall sensor board off ebay Reliable Hall Sensor Board for For bafang BBS0102 HD G340 G320 Midmotor | eBay The sensors are not soldered in place and I do not see any identification to mark the left from the right leg. Does it matter which...
  4. R

    Display for Dabu controller ( pedego)

    Thanks for quick reply. Display doesn't do anything. It wouldn't switch on and had a big black blob across the one half. I will ask the owner if he knows how that happened. He just knew i tinkered with electric bikes and asked if I could have a look.
  5. R

    Display for Dabu controller ( pedego)

    Attempting to repair a friends Pedego electic bike. The Bigstone C500B display has gone. I have run the bike by shorting the power and data wires and then using the throttle. That all seems ok . It seems to lose power after a while on steep hill climbs and I wonder if that is because it is...
  6. R

    2 Speed Xiongda hubmotor

    Bonnie at Xiongda sent me a free tool to open the motor. It is a simple C spanner with two screw holes which you bolt to the hub in a similar way to your tool. It came with 2 screws of the correct length. I simple connect it fairly tightly then tap it with a hammer. I have never had any problem...
  7. R

    four failed smart bms's

    Hi all, both BMS's are now functioning correctly ( I think) The problem seemed to be that the switch function in the function setting from menu had got turned on somehow. I turned it off and now both bms's are carging and discharging normally. Thanks for help Have attached screenshot
  8. R

    four failed smart bms's

    One of the two bms's seems to working ok now. just clicked on the discharge box on the menu on the front page of the android BT display. It was off. Not sure why.The discharge box on the other bms only comes on when charging and I can't "switch" it on when not charging. Balancing, and BT...
  9. R

    four failed smart bms's

    I lowered the overvoltage and pack overvoltage parameters whilst the pack was fully charged. Could it be that that could have tripped the overvoltage switches and either damaged the board or somehow switched off the battery. Going to run it without the bms to lower the voltage and then...
  10. R

    four failed smart bms's

    Bought BMS's fom JBD battery store via aliexpress https://www.aliexpress.com/store/1379203?spm=a2g0s.9042311.0.0.96154c4do55VvZ
  11. R

    four failed smart bms's

    The BMS's have been on 3 different batteries used on the 3 family bikes. All 13s. 2 failed yesterday seemingly around the same time. May be a coincidence but I altered the parameters on them the day before via an android phone to give a lower cut off for charging and higher for discharge...
  12. R

    four failed smart bms's

    Just wondering if anyone had an idea as to why I have had so many Smart BMS's that have failed usually after a couple of years use. ( 4 on 3 different 13s batteries over about 3 years.Is this usual. I am not aware of shorting or damaging them but though ok spotwelding cells together and wiring...
  13. R

    Reason for not balancing properly last group of cells?

    Meant to add. As you can see 13th block of cells is not balancing despite the bluetooth BMS measuring voltage. What are the possible reasons for this or is it a faulty bms?
  14. R

    Reason for not balancing properly last group of cells?

    Hi have a bluetooth bms to balance a 13s li-ion battery. It does not balance the last group of cells. Pictures below
  15. R

    bluetooth BMS?

    Hi all, Have wired in https://www.aliexpress.com/item/13S-48V-li-ion-Smart-Bluetooth-BMS-with-20-to-60A-constant-current-54-6V-Software/32876805034.html?spm=a2g0s.9042311.0.0.2cb84c4d7XUDAR bluetooth 13s As you can see one of the group of cells is 0.1v below the rest. I have set it to static...
  16. R

    Did the bms drain the cell group?

    Thanks, that is what I will do.
  17. R

    Did the bms drain the cell group?

    I have the same problem. Is there a way to replace or repair the balancing shunt? I am going to replace the BMS with this bluetooth one...
  18. R

    will 14s bms be ok for 13s battery

    Thanks for reply. I,ll try your suggestions. so i short 15th balance wire with 14th one.I presume this would be on the positive end right? Why cant i just ignore the 15th wire and cut it off
  19. R

    will 14s bms be ok for 13s battery

    Hi I was sent a 14s bms from ebay [https://www.ebay.co.uk/itm/48V-13S-45A-Li-ion-Lipolymer-Battery-BMS-PCB-with-Balance-For-Ebike-Escooter/352110181143?hash=item51fb66fb17:g:GWEAAOSwFdJZtikT]here. I ordered a 13s one. I am requesting a return. But would it be ok to use using only 14 of the 15...
  20. R

    NKON vs the world??

    >>Checked the link...for a big battery its VERY poor for power..only 5 amp discharge??....a bit of a joke, and out of the three cells tested, they all varied in resistance and that will wreak havoc in a pack with regards to balancing.<< Haven't yet built battery so haven't tried it but my...
  21. R

    NKON vs the world??

    True but ok for someone building batteries for their own use. In the UK prices between Nkon and Gearbest are very similar but the Lillaka batteries from Gear best are currently cheap at around £4.50 for a 5Ahr battery. Also as soldering pack only about half the number of batteries to solder...
  22. R

    NKON vs the world??

    Gearbest seems pretty good. Their delivery is slow though, shipped from China but postage prices are good. I found I had to split my order of 26 Lillakala battries into 2 shipments for the website to accept my delivery. https://www.gearbest.com/batteries/pp_663615.html?wid=21
  23. R

    No weld: using 10x 4pc packs ?

    I am using a 13s 52 cell battery using these. So far no problems. It is for a xiongda 2 speed motor so draws around 10 to 12 amps. Have only done about 600 miles so far but it all seems good. I have simply used a couple of wraps of insulating tape to keep batteries secure red on positive end and...
  24. R

    18650 Cell Source

    GearBest https://www.gearbest.com/batteries-chargers-c_11298/ seem to have a good price for batteries as well eg 8 x ICR18650 - 28A 18650 2800mAh Samsung Batteries £18.29 or I think around 20$ plus a reasonable postage. Their LiitoKala Lii - 50A 5000mAh 26650 at around £4 each have good...
  25. R

    what do you think of this

    Strange he was selling a 15amp 24v headway just before Christmas. http://www.ebay.co.uk/itm/24V-15-AH-LifePo-4-Headway-Battery-Pack-BMS-Fan-Assisted-Smart-Charger-/300836419381 His prices are good though and I was tempted as I think my Ping is starting to lose its capacity. Might contact him if...
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