Search results

Date Relevance Most replies

  1. tungsten2k

    Charging a portable power station from a Tesla Model 3

    Those DC-DC converters usually get only about 60% of rating before turning into a hot mess, at least the several I tried that looked very similar which I use for converting my 14S bike pack down to 12V for running automotive accessories as well as charging my FPV drone setup with when out on a...
  2. tungsten2k

    Source of "HAILONG-1-II" in white ?

    Anyone know a place to purchase the Hailong-1-II 13S/5P case in white ? (also called "Shark", "Dolphin" or "Case-08" (at BMSbattery). All I can find is black, but the picture on this page alludes that white might be out there somewhere :)...
  3. tungsten2k

    New Bafang Crank-Drives

    Yes, it is 44T so what is on the site today appers accurate. -=dave
  4. tungsten2k

    New Bafang Crank-Drives

    You're right, that's weird. I didn't ask special it; ordered right off the site. His site also shows it as $10 but I paid $8 so the site has def' been changed. Hrmm. I think I'm going to go count the teeth on mine :shock: -=dave
  5. tungsten2k

    New Bafang Crank-Drives

    In case anyone is interested: EM3ev 14S 2A 58.8V fixed-voltage charger: 579g EM3ev 14S 5A 53.2V/57.4V/58.8V 3-voltage charger: 806g 46T BBS0x chain ring and guard: 400g 42T BBS0x chain ring and guard: 303g -=dave
  6. tungsten2k

    New Bafang Crank-Drives

    Yeah, but I don't see how one could break the 5v+GND leads out of the brake cable and keep it weatherproof unless I slit the entire thing then heat shrink it back up around some hot-glue for sealing. Even then, it sounds like a potential problem when the water works its way into my blind splice...
  7. tungsten2k

    New Bafang Crank-Drives

    Perfect ! I though they were just switches. Through crafting some longer Google queries at site:endless-sphere.com, I finally found the breakdown: http://endless-sphere.com/forums/viewtopic.php?f=28&t=50104&start=2700#p909779 I guess I can disconnect the rear brake and re-route it back into...
  8. tungsten2k

    New Bafang Crank-Drives

    Does anyone know if there is a relatively easy way to pickup a trigger off the BBS02/750 without taking appart the motor/controller ? My goal is to electronically "turn on" a USB power port (and inverter) when the BBS02 is turned on using the standard soft switches on the C691 display. The...
  9. tungsten2k

    New Bafang Crank-Drives

    Also highlighted is the rib that will likely need a bit shaved off (at an angle to match the clearance needed from the downtime. This is only because of using a bb wider than 68mm which causes the motor to not be centered on the BB per design. -=dave
  10. tungsten2k

    New Bafang Crank-Drives

    I went through this too. 1) Then you probably didn't install the motor as tight as you could up against the downtube. The rubber pad on the BBS0x is supposed to butt tight up to it. If you cannot do this, because of the design of the frame, then you probably should build something to take up...
  11. tungsten2k

    New Bafang Crank-Drives

    I used these and they worked: http://www.dx.com/p/male-female-bullet-insulated-connector-crimp-terminals-yellow-50-pairs-148501#.VICUj8mnBIl But then I ended up replacing the male (motor) side after shortening anyway. -=dave
  12. tungsten2k

    New Bafang Crank-Drives

    I seriously don't get all the hoopla… as long as the welds for all the tubes headed into the BB remain intact, since the BBS0x doesn't require or use any threads from the BB, I would just grind that sucker down to 68mm and call it good. It would even give you the opportunity to manipulate where...
  13. tungsten2k

    New Bafang Crank-Drives

    Wow, that'll be nuts. I'd probably consider using the cardboard tube separators or plastic grid holders to ensure a short doesn't occur. That's a lot of energy between your legs :-p I'd also be curious how well the controller holds up to the 14S pack voltage long-term. Teslanv has a 14S setup...
  14. tungsten2k

    [DEAD PROJECT] OSBMS - A scalable, low cost, and full featured BMS

    caveat: this is for 4.2V LiPo chemistry. I'm unsure of the LiFe voltages but I would imagine the same delta values would work, while the V(target) would just be lower. -=dave
  15. tungsten2k

    [DEAD PROJECT] OSBMS - A scalable, low cost, and full featured BMS

    The standard for MP-controlled LiPo hobby chargers is to: Perform test discharge of main pack at a fixed (calibrated) discharge; while doing so calculate individual equivalent Internal Resistance of each cell: R(int) = V(cell)/I(dischg) Use this R(int) for each cell to determine safe balance...
  16. tungsten2k

    Ebike Battery Monitoring and Control System

    I originally used Polyvinyl rain gutter downspout for my batterycase (3x 4S1P 5Ah HK hardpack LiPo that you and most others use) but at 222Whr, the battery was *just* enough capacity for me (185lbs + 43lbs bike) and the 1000' climb up to my house the last 1/2 mile but I'd often find myself...
  17. tungsten2k

    A Collection of Power Supplies and Charging Solutions

    I don't know anything about the components I the meanwell: I talking about the BBS02 controller. Close to max rated voltage typically doesn't blow a cap but degradesit quickly. In the context of the BBS02 it could cause the voltage spike on batt connect that it over voltages the downstream...
  18. tungsten2k

    A Collection of Power Supplies and Charging Solutions

    This article states they found caps inside rated to 63v: https://www.electricbike.com/bafang-bbso2-750w-mid-drive/ Knowing how cheap caps are, I'm having a tough time believing longevity problems wouldn't surface soon running even close to the rated max. Would love someone to prove me wrong. I'm...
  19. tungsten2k

    New Bafang Crank-Drives

    W•Hr = f(t) = Vt•At (lim t => 0) Look at the data sheet of the 29E and you'll see that the mfr rated capacity is at low current draw. Lots of factors influence the quantitative data you're obverving, not the least is the sample rate of your equipment. Is your delta t (measurement) actually...
  20. tungsten2k

    [DEAD PROJECT] OSBMS - A scalable, low cost, and full featured BMS

    Just so I understand correctly, the standard "48v" 13S system would require 1x master and 2x slaves, with the last slave being used for the final 1S unit ? -=dave
  21. tungsten2k

    Icharger 4010 duo to bulk charger mod

    There is no "Foam cut" feature in the *Duo iCharger models. -=dave
  22. tungsten2k

    Icharger 4010 duo to bulk charger mod

    Select the cell count manually (e.g. "10S") instead of selecting "Auto" and it becomes a non-balancing charger. There is no mechanism to extend the charge voltage above 43.5 termination voltage (10S@4.35v). You also cannot charge a 20s Pack as 2x 10S packs connected to each channel while they...
  23. tungsten2k

    Calling all Bay Area ebike riders

    I'm at the San Francisco/Daly City twilight of the Crocker-Amazon (top of Mt. San Bruno). I've been lovin' my new Bafang setup and have already convinced a friend over in Bernal Heights to build an eBike (they have a Falco system on order to convert their Marin road bike). I'm looking to...
  24. tungsten2k

    New Bafang Crank-Drives

    Picture ? -=dave
  25. tungsten2k

    New Bafang Crank-Drives

    That's the new design where the jam nut covers the slotted nut to make it look like a single unit. The BB on my frame was wider than 68mm so the jam nut wouldn't even fit and I left it off. I used a pair of Vice-Grip welding clamps to tighten the slotted nut and checked the first dozen rides...
Back
Top