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  1. flyingbeekeeper

    Recommended sources for controllers

    I've been on Endless sphere for many years. But I've been gone a while, and have a bad 48v controller I need to replace. Who is a trusted source now? I picked a 48v controller off amazon that was crap. And I've spent too much time in the threads trying to find trusted suppliers. Who do you...
  2. flyingbeekeeper

    Brushless 350W Motor Stuttering and Screaming - New Build

    Just installed a new motor and controller. Found the right phase combo, Wide open throttle draw at .8 Amps, minor noise on startup. But when going 15-20mph and I hit the throttle hard, the motor makes a terrible NOISE (pedestrians will turn their heads at the sound), chokes, suddenly gets...
  3. flyingbeekeeper

    Soliciting input on designing an ebike for production

    OK, first I should introduce myself and why I have to ask this of the EV group. I've built ebikes for ~10 years ever since I put on my first Wilderness Energy brushed motor kit. I've got 5 bikes in my stable with 3 kits on them. I'm an electrical engineer with scars on my body from testing...
  4. flyingbeekeeper

    Battery bank cratered to 0.02v

    So I had a 13s13p homemade battery have a bank crater to 0.2v after a over discharge event that took other banks down to 2.5v. Bank #1 went down to 0.02 (not 0.2) and would not come back up with charging. It because obvious that a no-name pair of cells in it were hot so I removed them...
  5. flyingbeekeeper

    Is there a kit out that has built in amp-hour meter?

    From my research, I'd say no. Yea, I'm aware the latest display from Bafang BBS02 has a watt meter, but not a watt-hour meter.
  6. flyingbeekeeper

    Overcharged 18650 battery pack - now what

    Whoops, used the wrong charger on my homemade 18650 pack. About 17ah 13s9p made from recycled 18650s. The cells accidentally charged to 4.59v. Likely spent 2-4 hours overcharged. The entire pack got warm which is unusual for it. My first instincts was to put a 1amp load on it and bring it...
  7. flyingbeekeeper

    Cordless Tool Conversion

    So I had 2 cheap drills who's packs were dying and I converted them over to 18650s because I had some spares from a pack built (see Homemade Pack thread) And I posted a thread about a dangerous voltage inversion on one of the 18650s that I pushed too hard, at which point it devolved into a tool...
  8. flyingbeekeeper

    Dangerous 18650 battery voltage inversion

    Just built a 18650 battery pack for my cordless drill from 18650s that didn't pass muster for my bike pack. (Their self discharge fell from 4.20 to 4.15) Finished the pack, put it under load (pressed the drill button) and the weird thing happened. The drill turned barely then stopped. So put...
  9. flyingbeekeeper

    Anyone try the Mean Well HEP-600C ?

    Versions from 12V up to 54V and the 54V version can be adjusted to 60.5V and the amps adjusted from 5.2a to 10.5a. Puts out 10.5A for 54V version, and the case is fan-less, and is vibration resistant. But $190, which is less than the awesome Satiator (which I have), but not as flexible. The...
  10. flyingbeekeeper

    Signalab only hits 4.16v on homemade 18650 pack

    I've got 3 sub par cell blocks on a BMS, I'm confused why it can go up to 4.16 but not 4.20v. Any ideas? First, I know that 3 cell banks are weak, and replacement of said 3 will likely fix the issue. I'm not wanting to know why my pack is not hitting 4.2v, I want to know the controller logic...
  11. flyingbeekeeper

    Designing Folding ebike for Carribean Bike Touring

    So yea, I do a lot of travel, and now that I've cut my chops on a few builds I want to build an ebike for 1-2 week bike tours overseas, mainly Caribbean nations. I have some questions for my fellow ESers who have Downtubes. I was going to PM the resident Downtube converting expert, mwkeefer...
  12. flyingbeekeeper

    Why Max amperage rising after 1 minutes hard usage?

    I've got an old brushed motor driven by a 30A controller. On hills, it will put out 30A and then as the motor gets hot (or other components) it will start to climb to 36A. I've wondered why, and wanted to ask ES what ya'll think is happening. My classic EE background says that if the...
  13. flyingbeekeeper

    Equivalent rated Brushless motor to my modded motor?

    I've got an old 600W Wilderness Energy kit motor (AOTEMA) that I put into a bike. It ran fine for a few years but then I tweeked the bike this year. Designed for 36V SLA, I bumped the voltage up to 48V LiFePo. Modded the controller to put out signal to a Cycle Analyst. I've been doing some...
  14. flyingbeekeeper

    The FlyingBeekeeper's Huffy Hauler

    First, I started with a free Huffy bike found in the cast off pile missing some parts. It is an all steel heavy-as-hell POS frame, but the price was right. I installed an old Wilderness Energy kit (aoeta motor?) that was listed as a 600W brushed motor with a tiny 30A controller. Then I added...
  15. flyingbeekeeper

    RShunt value for Wilderness Energy BD-36

    Retro refit of the month: I've taken my old Wilderness Energy BD-36 motor (600W) and original controller (35amp not 20) and put them back into service with modern LiFePo Sunthing battery (48v) and a v3 Cycle Analyst with speedometer. The controller can handle up to 63V before caps pop, however...
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