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  1. M

    13s battery wont charge to over 49v

    my battery only charges to 49v then charger cuts off,its a smart bms set to static balance starting at 4v,the charger is a new 54.6v 3amp unit,any ideas what to look for,if it was a cell groupe dead i imagine i would get no power out but it still performs ok on the road but with reduced...
  2. M

    new controller downgrade and range

    Hi all,i was running a 500w 48v controller,i thought it had died so ordered a replacement,the seller sent a 350w,when i complained they refunded me and told me to keep the controller,it was the motor that was fried from ages ago,i fitted the 350w controller,i used to get about 20 miles range...
  3. M

    xiaoxiang bms app settings

    hi can anyone tell me what the closed or open balaNCE SETTING DOES,ALSO WHAT VOLTAGE SHOULD I SET THE CELL BALANCE START VOLTAGE AT ON THE APP,CHEERS,ps sorry about the caps.
  4. M

    36+48v controllers

    i see some controllers being listed on ebay as being 36 and 48v units,how can one work for both voltages?,to me a 36v unit would lead to undervolting a 48v battery,is that the case or is voodoo at work?.
  5. M

    bikes going up in flames (uk)

    With a lot of media coverage on the news and in the papers about supposedly lots of ebikes going up in flames,why are we not seeing more secondhand ebike parts on the market?.
  6. M

    bionx motor

    Hi all,i have a bionx direct drive hub motor,i need to remove the steel ring with the magnets on it too refit it into a chineese motor body,any ideas how to remove it from the bionx casing,is it just an interferance press fit?,see pic,thats it sitting inside the magnets on the chineese hub...
  7. M

    stator poles

    I have a pair of 48v motors in bits,one is a 1kw chineese unit,the other is a 350 watt bion x,they are both direct drive hub motors,the chineese unit has 51 poles on the stator the bion x has 24,what difference does the number of poles make?.
  8. M

    bionx motor connections

    Hi all i have a bionx hub motor,it has an inbuilt controller as far as i know,i think its a 48v 350 watt unit,i would like to test it but only have a standard outboard controller,would anyone have a wireing diagram fot throtte etc,so i can test it?,thanks ,see pic.
  9. M

    Voilamart E-Bike motors

    Are they anygood,the one i am looking at looks cheap at £3o used,i assume there chinese?.
  10. M

    motor winding question

    Hi all,i have a generic chinese 100w direct drive hub motor,it seems one (or more)of the phases are shorted as i have continuety with phase wires and motor body,there are two poles next to eachother look blackened,would there windings on those poles be a single wire or a few in paralell?,i need...
  11. M

    shorted motor windings?

    Hi all i have a 1kw direct drive hub motor,its been fine ,some time ago i was running it at about 3kw,did about 1000 miles then went to a smaller battery 47v+ 500 watt controller,been ok for about a year in that setup,the other week i got off the bike and pushed it down the kerb so jolted it a...
  12. M

    Jbd smart bms heads up

    Just a warning to folks,i brought this jdb smart bms that can be wired fror a 10s too 17s pack,i ordered one suitable for 13s,the instructions to wire it that came were chineese gibberish,they mailed me a diagram of the wireing for 13s ,i also brought an lcd screen for it to display the cell soc...
  13. M

    bms connections help needed

    Hi all,i have just brought this new bms,https://www.aliexpress.com/item/1005004662835838.html?spm=a2g0o.order_list.order_list_main.4.21ef18029IGMSl its listed as from 10 too 17s,i ordered it 13s 60a,here is the wireing instructions,i am having problems trying to work out the balance wires for...
  14. M

    fake batterys

    a while ago i brought from ebay a sold as new 32ah 48v ln pack st £128,anyway long story short it lasted 2 weeks,i pulled it apart and it was a 3p 13s,totaly not 32ah,was 9 at most,anyone else had this?.
  15. M

    pack not charging fully

    Hi all,i have a 13s pack,lithium ion not lifepo4 my charger is outputting 54.6v but the pack gets to 51v then the charger shuts off,any ideas?,thanks in advance also are the schematics for jbd smart bms's available anywhere?,i have a fried resistor on one and need its value to replace as its...
  16. M

    cell prices

    hi all,about 18 months ago i brought a load of 1800mah cells to repair a pack i had,these were lipo LiFePO4 cells,a couple of months ago i went to buy another 18 of the same cells from the same seller on aliexpress,the price quoted was 500% higher than the cells i brought from him before,he said...
  17. M

    smart bms settings

    Hi all,i have a battery with a smart bms,it uses the xioaxiang app 2.1.1011 ver on the paramerters screen there is an option for open or closed balanced,what does that mean and how should it be set?Tia.
  18. M

    funny motor issues after a repair

    Hi all,for a few weeks my hub motor had a tight spot(direct drive),i stripped the motor and replaced the bearings,at the same time i replaced the wires in the axle as they were chaffed,i fitted the motor and it span ok on the throttle,then i cable tied the wires to the frame,now if i open the...
  19. M

    changed phone and lost bms app

    i am looking for the bms app with the yellow elephant not blue,anyone tell me where to find it?,cheers.
  20. M

    bearings or bent spindle?

    Hi all,i have a generic direct drive 1kw chineese hub motor in my bike,if i turn the wheel when looking at the wheel end on the hub,ie motor wobbles,its like looking at a warped brake disk end on as its rotated,would worn wheel bearings cause this or a bent axle(although the axle if fixed and...
  21. M

    one cell group wont fully charge

    Hi all,i have a homebrew 13s 10p pack with a chineese smart bms over bt,i notice cell groupe 9 never charges more than 4.108v any ideas why this is? all other groups of cells seem fine,cheers.
  22. M

    lowish wattage controller with regen

    hi all i had a 1kw controller that had regen braking,i swapped it for a 500 watt unit for better range,thing is the new controller has no regen braking option,has anyone a link where i can buy a 500 watt controller that has a regen option,ie ebay etc,TIA.
  23. M

    charger keeps cycling

    hi all i have a5 amp evergreen charger originaly for an 18s lithium ion pack,i wound the voltage down to 54.6 for my 13s pack and set the current to 5a using the pots inside,however i notice as soon as the pack gets to 53v the charger goes green,it stays like that for maybe 3 seconds then turns...
  24. M

    hub motor axle nut size

    Hi all,i have a 1kw direct drive hub motor,the axle is m16,anyone know the thread pitch of the nuts needed for it,i think m16x2mm but not 100% sure,its a generic chineese motor,also does anyone know where to buy the cables to renew mine as its chaffed due to a bad tourque reaction arm,its the...
  25. M

    quotes

    why when people reply to posts on here do they feel the need to reply with al the original questions and answers?,for me it just makes it a pita to follow,end up with a screenfull of repeated shit,anyone lse get pissed off by this practice or just me?
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