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  1. Doctorbass

    Rad Power Batteries are now UL certified and fully potted

    Epic Resin are making potting for ebike battery. They make a special formula developped with parthnership of electric godness ( do your search on that company please!:)) and it has endothermic feature which absorb the heat. My opinion on ebike battery repair is that only 1% or less know really...
  2. Doctorbass

    Ping battery go out of business ?

    I bought 7 battery back in 2008 for building ebikes for my familly. These were 48v 15Ah. Over the years some ebikes were sold and some still are in the familly... with original battery... 16 years old LFP battery! Some had BMS ( the poor signalab BMS that drain current on the 4 first cells ...
  3. Doctorbass

    UL2271 Battery Certification Confusion - Cell spacing & max battery Voltage

    Hello guys.. Long time no post for me.. I was quite busy these months. I have found some aspect of the UL2271 certifications that seem to not be properly adressed and i would like to get your opinion about that if you have valuable info. Adressing CELL SPACING! With all these fires from ebike...
  4. Doctorbass

    Just a test to check if i can post now.

    It seems to work. =)
  5. Doctorbass

    Sur-Ron - New Mid drive Bike

    That is a great idea. It work very well and take large input voltage range for the source! Doc
  6. Doctorbass

    Laser battery processing

    We are actually exibitor at the BATTERY SHOW or Stuttgart in Germany. Come ans visit us if you are nearby. We are at the booth D100 in the hall 10. We brang our ultra fast Battery laser cleaning machine and have cool.people passionated with laser and battery😉 Doc
  7. Doctorbass

    Laser battery processing

    Oh yes! In fact we only wanted to show a welding for the video shooting so the EVE cell 280 Ah was not supposed to be welded as it was not our cells ! I had previously put a 1 cent copper disc below the busbar to avoid the laser to reach the prismatic tab, however guess what! , our 500 watts...
  8. Doctorbass

    Laser battery processing

    A suggestion for these needs: - Battery Tab Laser cleaning for ultrasonic & laser welding - Battery case Laser cleaning for structural battery adhesives and Thermal Interface material bonding - Battery laser marking for tracability, exemple DMC codes, brand and part numbers etc - Battery case...
  9. Doctorbass

    75-5 ZERO MOTOR REWIND

    Thanks you John, That is exactly the answer i needed. I was also worried about skin effect as well as wire emal dammage. I have 22 gauge and 14 gauge wire roll with emal so two difficult possibility.. I think that 14 gauge is probably better suited for big primary of a Tesla coil project...
  10. Doctorbass

    75-5 ZERO MOTOR REWIND

    Ah ha! Luke you are awsome. I guess both can be in sync with the same hall signal right? Then a dual 3T would be incredible. I remember Biff told me 1200pA max before stator saturation on the 75-7 ( 7cm stator width) hybrid 4T and 800pA for the 6T regular. Any idea for the 75-5...
  11. Doctorbass

    75-5 ZERO MOTOR REWIND

    Hmm sound like The ARLO mod as you know!! :D 3eL0EMFPnVw Doc
  12. Doctorbass

    75-5 ZERO MOTOR REWIND

    I plan using one of my BAC8000 and max it out. The last specsheet 2022 from october mention it is now max 86V instead of 90V so i will use 20 or maybe 21s ( if at 4.15V) The max batt current is also mentionned to be 730 bA so with a sag to his nominal or a bit above it wold be let say 78V and...
  13. Doctorbass

    75-5 ZERO MOTOR REWIND

    From the project of this original thread: ZERO XU 2013 to 50hp ZERO FX conversion https://endless-sphere.com/forums/viewtopic.php?f=10&t=115877 I have made some calculations about the motor rewind. This 75-X plateform ( 75-7 and 75-5) seem to have 6 turns per tooth. I know that the 66V...
  14. Doctorbass

    ZERO XU 2013 to 50hp ZERO FX conversion

    Hello guys, New project starting: converting a old 2013 Zero XU to a FX with 50hp on it. :D POWERTRAIN: I plan running it on 72V just like my Sur ron X and using aASI BAC8000 controller capable of 90V max and 860phase amp. I will rewind the motor to match the 72V by reducing the number of...
  15. Doctorbass

    Mobipus 72600 and Zero 75-7

    Btw i'm converting the 75-5 of my 2013 ZERO XU to Hall sensor with that RMB29 pcb that i already have. This is for my XU converted to FX I will also rewind it to 74v instead of 102V with less turn and more parallel strands ( same copper fill) I will use my BAC8000 controller at full 860 pA...
  16. Doctorbass

    Salvaged Zero FXS motor converted to hall sensors

    I am also converting my 75-5 from a 2013 XU to hall sensor and also will rewind it to 74V. I will use it on my bac 8000 at full 860 pA Doc
  17. Doctorbass

    Mobipus 72600 and Zero 75-7

    The hall sensor that lifeforphysics talked about for the 75-7 are made by RLS and are model RMB29 i believe. https://www.rls.si/eng/rmb29-rotary-magnetic-module Part Number RMB29EE12BS66 Choose: 1) Commutation single end 2) 5 periods per revolution (10 poles). 3) 4096 points per revolution...
  18. Doctorbass

    Highest PHASE AMP EV motor controller existing EVER?

    I keep an eye on the next project Luke is doing with a 2400A controller and i remember that many times he told me that the best EV would operate below 100V and have ton of phase amp. As well there are many other importants details about that LV concept but that's not the goal for this thread...
  19. Doctorbass

    160 KW 72v Cntroller QS/Yuma 15KW 300A BMS

    I guess Luke could get the very rare motor version called "hybrid 66V" version of the 75-7 capable of 1200A per stator ( 2400A total for the dual version) This motor is a special winding for the 2012 ZERO working on 18s, that were fabricated for a recall to replace the deffective motenergy...
  20. Doctorbass

    Joshuasyafa's collected wisdom

    I have one. I wrote you in the other thread in item for sale NEW. Doc
  21. Doctorbass

    Joshuasyafa's collected wisdom

    I have one brand new never used. The aluminum parts are blue anodized - I have the 60T crank, - a used boxxer fork (repainted) - and blue grey handlebar that match perfectly. - A set of used hydraulic brakes It's a 2nd NYX Project unfinished. I'm asking 2500+ shipping from Canada...
  22. Doctorbass

    160 KW 72v Cntroller QS/Yuma 15KW 300A BMS

    The pictures are not from me but from curtiss motorcycle company. They made their own version of dual stack in parthnership with ZERO ( you probably already know i guess). https://curtissmotorcycles.com/ +1 205-352-3434 info@curtissmotorcycles.com Electrek made an article about that: Under...
  23. Doctorbass

    160 KW 72v Cntroller QS/Yuma 15KW 300A BMS

    Well I heard high phase current and batt current! Time to spend more time on the E-S like before i think! ! Luke I'm also very curious about that controller and curious if it's cheap chineese phase amp or real phase amps! I am also very curious to see this new Deathbike my friend! The dual...
  24. Doctorbass

    Sur-Ron - New Mid drive Bike

    For those who are looking to replace the motor KTY84-130 temp sensor inside the motor, be aware that these are discontinued and also that there is alot of fake one on the market that might at a certain high temperature begin to give false reading making that you think your motor was rising temp...
  25. Doctorbass

    Careful when buying KTY-84 temp sensors

    awsome Thanks for posting I'm trying to find replacement one but they are discontinued like you said. Chineese people stil put these in the Sur Ron motor apparently... Doc
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