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  1. J

    Robots increasingly used, displacing human jobs

    Universal income. Everyone's needs are met, everyone does what they're good at and enjoy. If others like some of your side projects and you wish to sell them for a bit of extra disposable income, good for you. Edit: If one must still figure out a creative source of income or new employment, we...
  2. J

    Robots increasingly used, displacing human jobs

    The faster the better. This will eventually progress society and provide more time for art and creativity and scientific discoveries. Once the common people are no longer valued only for a dollar per hour rate we can progress past wage slaves and provide more basic necessities for everyone...
  3. J

    need help with controller

    You will need to connect the red ignition wire to the battery positive as well. That is the third wire on the power connector. Should be two red connected (thick and thin) together to battery positive and the one black to battery negative.
  4. J

    Anyone try the electric motorcycle style mopeds off ebay

    Currently my battery is about 1.8kwhr 20s9p Panasonic PF cells at 26.1ah. That's really what's holding me back from running more than about 5kw currently as I've had to dial in the cycle analyst to prevent the BMS from tripping and the cells would sag too much going much higher, hence the plans...
  5. J

    Anyone try the electric motorcycle style mopeds off ebay

    Yes, I believe mine has about 14"x9" battery box with decent height as well. I've currently got a similar 20s10p battery in there with about 2kwhr, but I've got a module from a p90d tesla that I'm planning to configure as about a 5kwhr 20s20p pack that should use a bit more space in there. Been...
  6. J

    Anyone try the electric motorcycle style mopeds off ebay

    My 12" hub runs 120/70-12 tires. Would likely work with a 130 or 140 if there's clearance on the frame/mud guards. I could take some measurements of the dropouts if it'd be helpful. Pretty sure the grom clones run the same motor as the zumas. Even if they can be built up for decent power, I...
  7. J

    Anyone try the electric motorcycle style mopeds off ebay

    I have one of these Zuma 125 clones with a slightly different style (vertical) headlight: https://www.ebay.com/itm/332061206247 It worked fine stock, but I highly recommend a cycle analyst, lithium battery and a bigger controller if you'd like a bit more acceleration. On 20s lithium ion...
  8. J

    Elon Musk’s idea for fixing traffic...

    Give every taxpayer a tax credit for an electric bike or scooter instead of spending billions on new infrastructure that the US has a tendency to let fall into shambles. I thought he was going to suggest more cars with autopilot that could communicate with each other via a mesh network as the...
  9. J

    Tesla 18650 module disassembly help wanted.

    I'll try to grab some photos showing the glue tomorrow. It is crystal clear and just slightly flexible. I believe that the top and bottom plastic plates are polycarbonate which may be slightly softened and able to be deformed enough to free the cells with ammonia or acetone. Anything that would...
  10. J

    Tesla 18650 module disassembly help wanted.

    In Milwaukee, but I appreciate the offer. I've liberated about a quarter of the cells so far. Any tips on a particular solvent or maybe slightly heating the epoxy but staying below like 140 so as not to damage the cells but enough to soften the epoxy? I may also be acquiring another module in...
  11. J

    Tesla 18650 module disassembly help wanted.

    Would anyone be able to provide some tips and tricks for the disassembly of tesla 444 cell battery module without damaging the cells? I've removed the side panels and slowly peeled back the top and bottom plastic after removing the bus bars. Is there any truck to this or is there any solvent...
  12. J

    E-Bike XB-502 conversion project

    https://endless-sphere.com/forums/viewtopic.php?f=31&t=81211&hilit=BMS I purchased one of these but it's been sitting on a shelf as the batteries that I was going to use it on from a Ford Focus electric arrived damaged. I never ended up using it as I ended up purchasing a pack with a BMS. It...
  13. J

    E-Scooter project build. 50 kw peak (video online page 4)

    I didn't think the halls were the problem, my bets were in the kelly. Just figured it was best to check before you blame kelly. Not that they dint deserve the blame. Good luck. Look forward to seeing how it all turns out.
  14. J

    E-Scooter project build. 50 kw peak (video online page 4)

    Many people have had many problems with kelly controllers. Here is a thread when someone had many current limiting. They were able to get kelly to replace it with bigger controller which helped, but they still had the current limiting issues and eventually moved in to more powerfully and...
  15. J

    E-Scooter project build. 50 kw peak (video online page 4)

    I wouldn't go with a more expensive kelly and hope unless you could like get kelly to loan you one to try and allow you to pay the difference and keep the new one instead if it helped. The other option would be to return the kelly complaining that it doesn't perform as advertised and go for a...
  16. J

    E-Scooter project build. 50 kw peak (video online page 4)

    As to the 550a limit, Kelly advertises their controllers using the phase current. Your controller may put out near 550a phase current when the current limiting is not in effect. The phase current is not measured by the cycle analyst, only battery current. You could put a clamp meter around a...
  17. J

    E-Scooter project build. 50 kw peak (video online page 4)

    A fan blowing along the side where the fets attach with a makeshift duct and possibly one blowing through the controller as long as it is in a fairly dry part of the bike. Just keep an eye on the temps and see what it can maintain. If you want to get even more sustained power, make a custom...
  18. J

    E-Scooter project build. 50 kw peak (video online page 4)

    Here is the link to the sales thread for that last one: http://endless-sphere.com/forums/viewtopic.php?f=31&t=58190 I have a small far less powerful moped project of my own and would love one of those if I could afford one as I recently beefed up the rear motor, though, it is so light it dos...
  19. J

    E-Scooter project build. 50 kw peak (video online page 4)

    Very cool project. In case you haven't seen it yet, here is a link to someone from MIT doing a build with a sevcon and how he programmed it. If you want to get your hands dirty and money And TIME are no object, dig in. http://endless-sphere.com/forums/viewtopic.php?f=10&t=52588 The others do...
  20. J

    24s BestechPower BMS Thread

    Yes, it makes sense, and it is basically what I was planning other than completely shorting out battery channel one, though that makes sense. I am positive that Q1 is shorted and none of the others are. It has 0ohms of resistance measured in either direction whereas none of the others exhibit...
  21. J

    24s BestechPower BMS Thread

    Do you see any issues with this, and does this seem like it would work to you?
  22. J

    24s BestechPower BMS Thread

    It appears as if it would just be easiest to way to fix the problem would just be to remove Q1. After that, it is a very simple hack to power the cutoff circuitry from cells 2-4 instead of 1-3. Rewire the positive of three to the positive of four: Then rewire the ground to the new one (from...
  23. J

    24s BestechPower BMS Thread

    When you purchased this from bestek, was there any warranty written or implied? How should I go about getting it repaired or having replacement components sent?
  24. J

    24s BestechPower BMS Thread

    I used a small 5v power supply and attached the source and the drain, but then I decided to apply it between the source and the gate as that is where the short was as that would surely heat up (seeing as that was where the short was). Somehow, the problem seems to have fixed itself because there...
  25. J

    24s BestechPower BMS Thread

    I know that they are all in parallel.
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