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  1. J

    Ebike Wrong Voltage showing On APM Please help.

    Appreciate the responses guys! I took apart the battery pack because I was packing it for transport and then changed my mind. When I reassembled it I accidentally dropped a screw between the pack and sparks flew It sparked for about 3-4 seconds then the screw fell to the ground and it stopped...
  2. J

    Ebike Wrong Voltage showing On APM Please help.

    Omg Thankyou so much the black probe is as not in COM thank gir the cells are ok felt for one There is no Bms with this pack by the way The defective cell measures at 0.17 volts Trying to wake it up now hopeless?
  3. J

    Ebike Wrong Voltage showing On APM Please help.

    Just checked the leads on my charger turns out they are reversed as well so all this time my charger has been reverse charging ! It's been working fine for a year but can I continue safely with this reverse issue?
  4. J

    Ebike Wrong Voltage showing On APM Please help.

    **** ALERT UPDATE***** Yes red on + black on - gives a negative voltage reading Just found out that 1 out the 24 cells in the pack is dead! I've been charging my pack with 1 dead cell for god knows how long could that of caused the reverse polarity? Are you saying there is no way to fix this...
  5. J

    Ebike Wrong Voltage showing On APM Please help.

    New update Just took apart the pack to check all voltages and noticed that all the cells poles have been reversed Somehow I backwards charged my whole pack where positive became negative and negative become positive are all my cells ruined? How do I get it back to normal ?
  6. J

    Ebike Wrong Voltage showing On APM Please help.

    Oh oh, You're right so if the polarities are wrong would that damage the cells? Because I took apart my whole battery pack and found 1 dead cell with voltage of 0.2v I've tried leaving it in the charger for 4 hours but it won't hold the charge at all. I'll just have to figure out this polarity...
  7. J

    Ebike Wrong Voltage showing On APM Please help.

    You bring up an excellent point! Everything was working fine before Until i removed 4 batteries from the pack and reconnected them, Maybe they aren't connected properly or I connected them in reverse but wouldn't there be shock / sparks if I did reconnect them properly? I will reconfirm the pack...
  8. J

    Ebike Wrong Voltage showing On APM Please help.

    These are 24 headway cells 40152 I don't think they are sla no.
  9. J

    Ebike Wrong Voltage showing On APM Please help.

    The APM is showing the wrong voltage and as a result the motor will not move at all I am stumped as to what the problem is, here is what the APM is showing around 46volts Here is what my 72 volt pack is showing around 75 volts I then connected the controller to the battery and probed the...
  10. J

    Electricity battery safety books recommendations

    sorry if it sounded cheeky but it's my first time and I don't feel like getting shocked. If I understood the inner workings of electricity batteries and safety I wouldn't need to follow instructions like a programmed computer. Basically I need books or materials I could read and I'm not sure...
  11. J

    Electricity battery safety books recommendations

    I need help on how to safely build a 72v 15ah headway brand pack that comes with bus bars and orange brackets. These are the 40152 cells. I am not a licenced electrician, nor a battery technician by any means, I have some basic knowledge soldering skills, and all the proper tools but I'm...
  12. J

    Awesome idea !Non motor wheel for redundancy

    Everyone knows that motors have a very large thick long yoke to bolt on to the dropouts If for some reason the motor malfunctions your ebike is useless crap, If the frame is designed to only support thick dropouts I propose we need a special wheel without the motor casing that has the extra...
  13. J

    The Ultimate Ebike Bible Book, Does it exist?

    Are there any ebooks on amazon etc that help you trouble shoot ebikes anywhere from battery packs to controllers, to maintenance you know...something along the lines buying a book for trouble shooting regular bicycles?
  14. J

    Controller Power issue

    Because I fear I may harm myself or property I have decided to step down and not attempt to repair the battery, instead I would like to read any books that would help one trouble shoot ebikes. I dont feel confident enough to do it. Thanks guys if you can recommend any books that would be great!
  15. J

    Controller Power issue

    http://www.hobbyking.com/hobbyking/store/__5548__IMAX_B6_50W_5A_Charger_Discharger_1_6_Cells_GENUINE_.html Found the b6 Link above Is this good enough for balancing charging or discharging my 14s pack?
  16. J

    Controller Power issue

    2 channels are not missing, The BMS picture is a 16 channel My BMS is a 14 channel Same brand different channel amount
  17. J

    Controller Power issue

    I have had the battery for a year now so maybe it is expected that these problems would arrive after a year. Not sure it would fall under the defective category. I am going to be honest with you but I had an instance where I stuck the probes in the positive and negative discharge ports and I...
  18. J

    Controller Power issue

    The way I see it I have 2 options, 1) I can either discharge the FULLY charged cells OR 2) Fully Charge the 4 cells that are low Option 2 seems like it would take less time although how I would charge them is a mystery. I would prefer to choose the option where I don't need to completely rip...
  19. J

    Controller Power issue

    I have re measured the voltages using the 20V setting on my multimeter here are the results starting from pin 15 4.19, 4.18, 4.18, 4.19, 4.18, 4.18, 4.18, 4.18, 4.18, 4.18, 3.46, 3.47, 3.47, 3.47, Pretty much the same result as last time Those last for cells seem low still. Any ideas?
  20. J

    Controller Power issue

    Here is a picture of the BMS. I need to measure using the 20V setting? Does it have to be that accurate? The measurements i am getting are to the nearest 10th of a volt do I really need the nearest 100th of a volt ? The results I gave below for the voltages should say enough about what the...
  21. J

    Controller Power issue

    More progress has been made, Here is how the battery is oriented so you can get an idea of how I'm looking/ working on it. Here is a screenshot of the multimeter settings used. And here is a zoomed in pic of the BMS showing the balance wires where you measure individual cell voltages. Keep...
  22. J

    Controller Power issue

    What I mean by unscrewing is this This is a view of the back of the battery, it is the only accessible area that shows screws. I assume I have to remove the yellow packaging on the back and remove the screws shown here to access the BMS but I am not absolutely sure, that's what I feel uneasy...
  23. J

    Controller Power issue

    Are you sure? Let me get back to you with a picture of Paul cellmans battery.
  24. J

    Controller Power issue

    Well ive been busy as hell which is why i haven't been on here in awhile but Ive made some progress. Here is my IBM power supply I cut the 12v wires yellow and black here and attached the alligator clips. Then attached the alligator clips on the other end to the black and red controller...
  25. J

    Controller Power issue

    http://www.amazon.co.jp/gp/aw/d/B00456XC6Y/ref=mp_s_a_1_6?qid=1415356149&sr=8-6&pi=AC_SX110_SY165_QL70 Bought this power supply to test the controller. I got a hold of Paul cell man and he suspects it's a BMS issue in the battery so I have to run some tests by checking.voltages Of.each of.the...
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