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  1. docw009

    Lishen LFP 2170EH cell

    Saw this mentioned in Paijda's thread. It's 3.2V3AH in the 21700 format. That means I need a 16S-3P for a 48 cell 48V9AH battery, About the same size as a 13S-4P 52 cell 48V20Ah battery. That's 45% of the capacity for a lower fire risk and probably 5X the life. A small 32 cell battery would...
  2. docw009

    3D printer choices for battery case

    Looking to build smaller custom cases, for smaller batteries., like 13S-2P. No need to go larger, as I can already buy the bigger cases for $40-60, I would expect to print the case in smaller sections and glue/screw them. Does this make sense from material costs? How much will the filaments...
  3. docw009

    Battery Failed.

    Had a battery fail yesterday. A mix of new no name and branded cells in a 13S-3P shrink wrapped pack I made in 2022. Never used and was stored at 30% til yesterday. Short story...I charged it up and it seemed unusually warm. Opened it up and found a hot cell group. Pulled them out immediately...
  4. docw009

    Dinky Battery 13S-1P

    I purchased the Battery Hookup Molicell M42's last month. Tested one at 4.2Ah on my Littokala tester with a 500ma load. Made a 13S-1P brick to see how they worked. Makes for a nice compact battery. My load tester says it's 3.8AH with a 3A load. I was disappointed with that, hoping it would do...
  5. docw009

    BBS02B prices.

    September 22, 2023, If I select US delivery, Pswpower has a 44T BBS02B for $366 plus $10 shipping? Wow. Anyone get one recently? I paid $450 last January...
  6. docw009

    Deleted

    Deleted.
  7. docw009

    PAS Sensor Pinout

    Round Julet Connector on a KT controller, and a KT V-12 sensor. FYI.
  8. docw009

    Rivnuts

    I bought a box of them several years ago, intending to mount a Hailong pack to an alloy downtube, but eventually used clamp-on brackets and hose clamps. My current two projects are also alloy, but the step-thru frame tubes (Diamonbacks) are 48-50mm in diameter. and I've heard some talk about...
  9. docw009

    Commercial re-use by Gouach, LLC

    Perhaps already posted, but found it interesting, and looks feasible as a business, when batteries become regulated. Describes a battery designed for repair and reclamation of cells. https://www.youtube.com/watch?v=c-FKfRISVbU&t=3s
  10. docw009

    Sturmey-Archer Hub from BCH

    Although the caption says electric bike hub, I think they are just a multi-speed hub with perhaps a drum brake inside. Is this a desireable item for a FWD bike or mid drive build? https://www.batteryclearinghouse.com/products/26-front-sturmey-archer-electric-bike-wheel-hub-with-tire
  11. docw009

    Cell group down to 2.2V, Toast?

    I have an unbalanced pack. Opened it up to find 9 groups at 4.07V, and one group at 2.20 volt. For academic purposes. I brought it up to 3.96 volt and it may go higher, but I stopped charging. There are various things I can do going forward, like bringing all the cells to max charge and seeing...
  12. docw009

    Strange: Sinewave controller won't start my MXUS XF07.

    I believe it's MXUS, but I bought it off ebay. I only used it once on a square wave controller, and it turned to be a 210 rpm model, not that good with my 20" wheels. So I put it aside. Today, I had a flat tire, and this wheel was sitting there with a tire, ready to go, so I tried to put into...
  13. docw009

    Mxus XF08 a weakling?

    I bought a MXUS XF08 rear geared hubmotor off ebay. Cheap at $93. Maybe too cheap. https://www.ebay.com/itm/MXUS-Ebike-Hub-Motor-Wheel-XF07-XF08-250W-Brushless-Gear-DC-36V-Electric-Bike-/163913340500 Put it in my 20" bike, using a 20A KT sinewave controller and LCD3. The motor only pulled...
  14. docw009

    AKM100 stutters on square wave controller

    I thought that the Q100H and AKM100H were very close to each other, I recently bought the latter from topbikekit.com. I laced it into a 20" rear wheel and powered it off an old KT 17A 36V square wave controller from 2016 that's been in my spare parts bin for a while. I thought it worked OK, but...
  15. docw009

    Stupid. Stupid. Killed a battery but no fire.

    Last night I put a 48V charger by mistake on my 36V 10S-3P shrink wrapped pack. Worse, I had an XT60 adapter plugged into the XT90 discharge port, and thought it was the XT60 charge port. So no BMS protection. I discovered my error a few hours later when I unplugged the pack, saw it was too...
  16. docw009

    Problem on Q128h Motor with s12sh controller 40A

    Seems like a lot of amps for the Q128H. It does not have a temperature sensor, but this sounds like the controller or battery cutting out. Can the battery BMS handle 40A? Did you connect a throttle and does that work continuously. What's the battery voltage and capacity?
  17. docw009

    Dead charge port. Where to buy a BMS.

    I have a very lightly used 13S 48V Dolphin pack from 2015. Less than 400 miles on the bike that it came with. I took it out yesterday and found it wouldn't take a charge after the ride. Tried two different chargers, which do work on my other 48V battery. Finally I took it up to a partial charge...
  18. docw009

    Buy your batteries qucik. Tariffs a coming?

    The "tariff list" says lithium batteries from China getting a 25% tariff on July 6. I believe controller boxes and electric motors are in there somewhere too.
  19. docw009

    36V. BBS02 vs TSDZ2 choice

    Looking to put either a BBS02 36V or a TSDZ2 36V on my next ebike project. User will be an older gal, 150 lb, and this will be for recreational riding at no more than 15 mph. Not using a hub motor because the aluminum frame has a lot of weight saving holes/filets around the dropouts. Mid drive...
  20. docw009

    Throttle Fault - old news?

    Here's a throttle fault I was not aware of. This happened when I had a new motor on a test stand, hooking up a throttle with jumper wires, so no harm done. Just a nice serendipity learning experience. If the ground wire on a Hall effect throttle comes off, the motor takes off. Re-attaching...
  21. docw009

    What can I do with this sensorless controller?

    Bought this by mistake for a geared motor with Hall sensors. Since it's only 22 bucks, I will just eat the cost. Still, would it work woth a motor that uses hall sensors? https://bmsbattery.com/ebike-kit/553-s09p-500w-torque-simulation-square-wave-controller-ebike-kit.html
  22. docw009

    Spokes for fat bike wheel lacing job.

    I am going to re-lace a new fat bike rim to a motor kit that came with a 26" mountain bike wheel and 12G spokes. The motor came with holes for 12G spokes. I would like to use 13G spokes in the existing holes, but the holes seem to be about 3mm diameter and are countersunk on each side, so maybe...
  23. docw009

    Would you use this Alloy fork with hub motor?

    I just received this fat bike fork. I wanted its disk brake mount. It was advertised as steel, but it's aluminum, On the other hand, it will save some weight if I can make a pair of torque arms. I have a geared hub motor and a 36V 15A controller. I would fab some sort of wrap around torque...
  24. docw009

    Bafang Fat Bike Hub Motor @ CNEBikes

    This is the geared G06.350.d Bafang with the longer axle to fit 170-190 fat bike drop outs. I'd like one, but hard to find a US supplier. Found two one-off's on ebay for $375 shipped. Neither ebay seller has sold any bike parts prior. Also found one with rim for around $599, but I believe I can...
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