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  1. J

    Parralel SmartBMS 13s how to configuration?

    Thanks for your input!! My brother has a Escooter where the battery pack was broken. Now I have a few battery packs 16Ah from my dealer that where 'broken' and fixed them. Now in the old Battery case can holding two off this 16Ah packs! I replaced both BMS's for the SmartBMS but struggling too...
  2. J

    Parralel SmartBMS 13s how to configuration?

    Hello all, Is there someone who will explain how to configuration 2 smartBMS's EEPROM settings so they will work in parallel setup. I connect the batteries too the smartBMS so they can balance there own pack. The power out lines are connected in parallel as the charge connection. The problem...
  3. J

    O2Micro OZ890 Based BMS Units

    Hello all, Is it possible too retrieve the password from a oz8920/oz890 chip? Finally I hooked my secondhand BMS (16s LiFePo4) O2Micro OZ8920 with 2 chips on it. After struggling too communicate over the i2c port I got the addresses chip 1(u2 on the board) has 0x62 chip 2 0x60 (u1 on the...
  4. J

    Repairing controller 2v problem

    I found the problem...... It's the Smart BMS! When I connect a load as a controller it cuts off. I reproduce it by connecting a lamp and the BMS disconnect the output power. A strange thing is that the BMS's led not lights up. Is there a way too force the BMS in balance mode? C7 won't help.
  5. J

    How cheap BMSes shorten your range

    My personal experiences is too use hand gloves! Not only for your own protection but also for your electronics! For unexplainable reasons I'm getting charged and when I go out my car or walk upstairs in a shop and touching my car or stairs there is a relatively big spark!!!! This have make...
  6. J

    BMS's i get sick of it too understand what the problem is

    Solved!!! It's the Smart BMS.... I have another one but I'm scared too use it. I don't want to loose another one.....
  7. J

    Repairing controller 2v problem

    Sorry for the bad information. Battery is solved but I'm waiting too the dongle so I can reprogram the bms. The fault was on the multimeter side. I was reading different values than my lipo charger and alc 8500 expert station. Too solve it I bought a better multimeter. About the controller...
  8. J

    Repairing controller 2v problem

    If I disconnect the controller I messure 48,8V, but when I connect the controller it drops too 18V! I claims slowly from 11V too 18V. Is this a mosfet failure?
  9. J

    Repairing controller 2v problem

    I've changed the battery but that wasn't it. A stupid question: the ignition key/switch will this disconnected or connecting the circuit? I'm struggling with a stupid alarm, if I connect it to the battery directly I can use the seat-unlock and hearing the alarm sound.
  10. J

    INFINEON CONTROLLERS FOR DUMMIES

    Good morning, This dummy want too knows where the shortcuts on the pcb stands for....... DS= E= S= B= 1:1= GND= Ground XS=Speed limiter T-,T+,T= throttle -,W,V,V,+= Hall signal wires RY= VS= RL= D= Q= XL= X= XL,X= += Battery + -= Battery -
  11. J

    Repairing controller 2v problem

    Hello all, I want to ask you if there a people that can help me too solve the 2v problem on my escooter controller. Yesterday I tried too repair it but could not find the problem. All caps and mosfets seems oke. The problem is that I get only 2 volts where it should be 5 volts. I have a...
  12. J

    BMS's i get sick of it too understand what the problem is

    Hello again, After many tries too read and write too the smart BMS with many different dongles I bought the expansive smartBMS own sub O2Micro i2c dongle. I tried: RUSB3410 Pikkit icd 2 Profilic 23xx Ftdi rs232 Rfduino Nothing worked. All of the dongles has not the good vid id. Is there a...
  13. J

    BMS's i get sick of it too understand what the problem is

    The problem is unbalanced cells. Li-ion charged at 4,2v
  14. J

    Unbalanced Pack Help

    Bottom balancing would maybe help. With bottom balancing will all groups bring too the same voltage level, and not in capacity And top balancing will only leveling the capacity
  15. J

    BMS's i get sick of it too understand what the problem is

    Thank you for your answer. The battery pack holds 2x 13s8p li-ion cells. Every part has its own BMS. Too charge the battery pack I connected both BMS on one charge input. The problem came after I charged every group on both parts. After finishing it I took a drive around 15Km. Then I hook it...
  16. J

    BMS's i get sick of it too understand what the problem is

    Dear forum friends, As the topic say I'm get sick off the BMS problems that shutdown the battery!!!!! Is there some kind of information or book where I can learn about bms's?? I'm not a electronic guy but want and need to learn solving problems. Where Can I find it? I'm not the only one...
  17. J

    BMS Software Firmware different suppliers?

    Hello Electric freaks, For a few days I'm searching the Internet for information around 'smart bms' firmware software and data sheets. The problem is i can't find a place where they all together!...... I'm looking for the O2Micro OZ8920 firmware,software and how to hook it up. Is it possible...
  18. J

    "Smart" BMS with OZ8920-TN microchip

    Now I got response from O2 Micochip! OZ8920 is standard programmed for LiFePo4!! It could be the problem... Now I need a programmer but this cost $200,-
  19. J

    "Smart" BMS with OZ8920-TN microchip

    Strange!!! I've opened the battery pack and discovered that it is not a 16s is but 13s!! Wtf is the reason to use a '16s' bms on 13s?? Could it be to speed up the bleeding process? Someone know more?
  20. J

    "Smart" BMS with OZ8920-TN microchip

    Heer are photos
  21. J

    "Smart" BMS with OZ8920-TN microchip

    Thank you for replying. Ic don it already but no effect.
  22. J

    "Smart" BMS with OZ8920-TN microchip

    Hello everyone, A week ago I bought some "defect" batteries from a dealer. Now I'm opening all the packs and measured one by one group. One pack has a fault group that not will wake up. The batterie packs are oke, but wen I want to charge them it stops after a half hour. After a inspection I...
  23. J

    Tips on waterproofing my battery

    You can two thing to protect a corrosion. 1- seal the battery with EPDM rubber. 2- filling the battery with oil. The only problem is wen there is a leaking. Another option is epoxy, but then you can't repair it because epoxy is very hard/massive. It fills all the holes and make it a solid...
  24. J

    Charging trouble

    Thank you all for answering. I was thinking that it trickle automatic when it drop to the 'charge' level of the bms. Is there a guide were I can check and setup a lifepo4/li-ion charger? Or what are the steps to measure and set the trim pots?
  25. J

    Charging trouble

    Hello electric geeks, I want to ask for help too solve the next problem. I have a 48V 6A lifepo4 charger that charger too a height of 58,4V. Now is the problem that wen it hit its 'full charge' voltage it cutoff. No trickle charge will start, I know/think because the voltage drop and the...
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