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  1. SniperGaulois

    BMS switches off randomly from hidden short circuit on 15 wires.

    After 20 years of building Ebikes, this is the worst electrical fault conceivable: On a 14S lipo battery, there's a bad wire so the BMS actions LVC low-voltage-cutoff, so the battery switches off every 20 minutes, possibly 10 miles from a road in a ravine. The battery is stuck together with...
  2. SniperGaulois

    Wrong tech name, where did the delete thread option go?

    ......
  3. SniperGaulois

    Can someone please run a science test on 18650?

    Hi, Please can you test compression limit that an 18650 can withstand... Is it 20 pounds? 90 pounds? Please can you compress some 18650's on some bathroom scales and measure on a precise caliper how many KG can change the height of the 18650? Do you have high-precision calipers at 10 microns...
  4. SniperGaulois

    Can the PTC and CID in an 18650 have discontinuity from knocks?

    I checked for discontinuities in a weldless 18650 box. There was a 0.041ms loss of signal when I dropped it from 35-40 cm straight onto the lid against wood... Do you think it could be the PTC / CID which could have vibrated and lost power? Because the CID contact area is quite small compared to...
  5. SniperGaulois

    A guy repairing a oxidized 18650 with PVC tape! Amazing!

    People should see this to know the level of financial struggle of some folk. Literally 1.5 billion people would save that 18650 cell. He doesn't even have blue sticky tape!!! We need to send him some blue pvc tape and shrink tubing! Someone post him some lithium. lol I can't wait to see the end...
  6. SniperGaulois

    Ebike fires in the news!!! CBS NYC

    Hum what ebike makes are they please? made where? What are the statistics for fires per year? like 99 ebike fires per year in the USA? woah! cor3O0hYN18
  7. SniperGaulois

    New Easy Lithium Weldless Box crowdfunding project

    Hi everybody, I'm going to start a foundation for easy lithium boxes, unless i have to agree with investors on a long term profit based model, to make this available, quality funded and open sourced, like arduino, that's why i'm going to start with the community to get the project running...
  8. SniperGaulois

    Just found 2000 LiFePo 18650 cells in the recycler

    I went to the recycler place to throw out a hifi and I found that there is half a bin full of brand new looking lithium batteries unwelded dated 2015 to 2019 1500 to 1800mA... It's from a company that does a bunch of lithium outfitting near where I live. I'd feel like an idiot if I let 2000...
  9. SniperGaulois

    9C Continents Fat Bike Axle mod 175mm + shop press?

    Can I re-fit a 9C hub with a 175mm rear axle for a fatbike? Where can I find the right 175mm axle? What about derailleur and cog alignment? Is there a way to offset the freewheel and the disk threads?
  10. SniperGaulois

    Suspension Wheel with pneumatic-spokes!!! Checkit!!!

    Very awesome!!! 10 inch of travel is cooler, although it's good to think in other ways! https://i.imgur.com/744mJVW.gifv
  11. SniperGaulois

    New hubs with magnet orientations like Tesla Raven powertrain?

    The new motor from Tesla's Model 3, called the raven, uses complex magnet orientation to raise motor efficiency from 92 to 96-97%, allegedly. Do you know if an motorbike and ebike motor companies will copy the idea, to have ebike motors that are twice as efficient as previous versions?
  12. SniperGaulois

    Carbon-Fiber Torque Arm

    Hey folks, I have figured out how to make a carbon fiber torque arm. Some of you have probably previously welded one of these and think "duh that's obvious I already did that"... it took me ages to figure out that this is the best way. Advantage : Micron accuracy, efficient with time, can be...
  13. SniperGaulois

    18650 flammability by a shell vaporizing test

    I set fire to a a Sanyo cell from 2018 in a controlled environment, I melted through the steel using a 100A current, by placing some battery terminals on either side of the negative terminal. The battery flashed as the steel and copper vaporized, and then it started burning the lithium inside...
  14. SniperGaulois

    Exceeding BMS amper rating... does it switch off or limit?

    I have two cheap 14s BMS from China. 30A balancing and 40A unbalanced. I am not sure which to use. The controller is 35A. Will it switch off the BMS? Will the BMS limit the output at 30A? I have fried a balancing board before, that's why I bought the unbalancing one. Currently I am running...
  15. SniperGaulois

    New weldless battery system crowdfunfing project

    Hi there, i became interested in designing a weldless battery system thanks to the genius discussions on this forum in about 2014, and i built a fun prototype which i smashed around and tested at 7.5 C-rate on used lipos. It was robust but it wasn't cheap enough to justify building kits like...
  16. SniperGaulois

    Cap cooling of 18650, thermal output graphs?

    I am researching 18650 cell cooling, one source said that tab cooling prolongs cell life by reaching into all the layers of the battery, is it the same for cylindrical batteries? How many watts of thermal energy does a 3000mah 18650 generate at 1,2,5 and 10C? I found a couple of fun videos of...
  17. SniperGaulois

    Is lidar the best sensor for autonomous driving cars?

    If we can have very good autonomous driving, we can reduce insurance costs by 10 times if there are 10 times less collisions. Isn't Lidar is a blunt instrument to use for autonomous cars? The billions of dollars of investment in lidar are not expected to bring hands free commuting in any know...
  18. SniperGaulois

    Crazy Genius bike design crankshaft-speeds

    https://www.youtube.com/watch?v=rgo-yEaXDzA Cool idea for bikes, the V1 is noisy, i'd bet that it can be made as noisy as a regular derailleur.
  19. SniperGaulois

    Strange Phase Bug

    When I leave my bike on all night, and try the throttle, the wheel doesn't know what is backwards and forwards, the motor shudders randomly. It's a sensorless 2016 xlyte controller and c9. When I leave the controller off for an hour, and power it up, it works fine, wheel goes around first time...
  20. SniperGaulois

    Are all IRFB4110 MosFET's the same?

    I have to buy a new IRFB4110 for an infineon controller, are any of the random ones on eBay ok? what's the differences? I figure Infineon makes their own versions, what about generic ones?
  21. SniperGaulois

    Infineon over-voltage fault/Hub MeltDown Incident.

    I cooked an infineon with rough handling, my fault for not using a Thermostat, the error code is flashing three times same as an overvoltage fault, except that the actual fault is that some solder melted when two of the phase wires shorted together (molten motor) and I put power through two...
  22. SniperGaulois

    Variable Regeneration Voltage Questions.

    I am finding regeneration awesome using a Grinfineon 2017 sinewave controller. I'm confused about the technical fine tuning. When I twist the throttle, the regeneration is not variable relative to the throttle position, the dampening force stays the same. I have CA23. CA3 is necessary to...
  23. SniperGaulois

    cooler graphene windings in motors?

    In the future, Graphene doped wires can be a lot lighter and cooler than copper. There's some info about it here. https://www.helifreak.com/showthread.php?t=717107 It'd be cool to have a 98 percent efficient hub. please send me one, It's a wise investment.
  24. SniperGaulois

    Dunk charger in boron nitride?

    Chargers can get hit with food and knocked about when travelling it's troublesome. I want to pot my chargers with boron nitrider flakes mixed with tin-silicone, and do away with the fan and the plastic box completely. Does it sound like a silly idea?
  25. SniperGaulois

    New kind of small charger and power supply?

    This is a new power supply integrated controller made from GaN instead of Silicone. It means that a good electrician can design bike chargers that are twice as small and lighter than currently available...
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