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  1. R

    Bafang BBS02 Build on Schwinn Road Bike

    opperpanter: Here is a link: http://www.ebay.com/itm/3-in-1-Bike-Chain-Whip-Bottom-Bracket-Freewheel-Wrench-Lockring-Tool-New-J-/121443156774?pt=LH_DefaultDomain_2&hash=item1c46938326 You can also search on "freewheel bottom bracket wrench" in E-bay. This tool only seems to come in one size...
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    Bafang BBS02 Build on Schwinn Road Bike

    gameofbikes: I built the battery myself with A123 20Ah pouch cells. You can find the info on my pack build here: http://www.endless-sphere.com/forums/viewtopic.php?f=14&t=48947 The 12s 36v battery pack cost me about $400 in parts and I guess I got lucky and got good used A123 cell at about $15...
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    Quick and Dirty Programming Cable for Bafang BBS02

    In case you are in need of a programming cable for your Bafang BBS02 middrive unit, here is a quick and dirty solution. You will need a TTL to USB serial cable using the PL2303HX chipset, a female-female jumper wire and some 3mm heat shrink wire wrap. The TTL to USB cable is readily available...
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    New Bafang Crank-Drives

    I was wondering about that rubber pad. I had a problem with my rear derailleur cable getting deflected and rubbing on that rubber pad. If I were to butt up the rubber pad to the downtube, it would pinch my cable. So I left a small gap between the pad and the downtube. I thought the rubber pad...
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    Bafang BBS02 Build on Schwinn Road Bike

    So here are photos of the completed Schwinn e-bike. Some of the Bike stats are as follows 29 lbs Weight of original bike 41 lbs Weight of e-bike with BBS02, rear cargo rack, dual kickstand 16 lbs Weight of 12s 36v 20Ah Lifep04 battery pack 21 lbs Weight of battery in trunk bag with tools 62...
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    Bafang BBS02 Build on Schwinn Road Bike

    So while I was waiting on the delivery of the BBS02 unit, I viewed the installation videos on california-ebike.com and the Czech girl at https://www.youtube.com/watch?v=Ia8lpz5J1pI. As I said, the installation was fairly easy. I purchased a crank extractor and bottom bracket tool from...
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    Bafang BBS02 Build on Schwinn Road Bike

    Following is my build of a Schwinn Searcher 1 hybrid/road bike with a Bafang BBS02 500w 36v mid-drive system. The build process was fairly easy thanks to all the helpful info from posters on the various threads here on this forum. So a big thanks to all those who went before me and posted on...
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    New Bafang Crank-Drives

    I got the Hub Cone Spanner BT-2919 tool for the Bafang lock rings on Dec. 9th. Ordered it on e-bay on Dec. 1st for $6.36 including shipping from China. It works fine as a spanner wrench for the M33 lock nut but does not work so well with the external lock ring. I finally got it to work on the...
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    New Bafang Crank-Drives

    I think I found a tool that will work on both the M33 locknut and outer locknut cover. The measurements look about right for the outer cover. I'm hoping it works since the tool is only about $7 on e-bay from China. I just ordered one so I'll post once I get the tool and test it. I was able...
  10. R

    New Bafang Crank-Drives

    There is another way to modify the brake switch with existing hydraulic or other brake levers. When I last e-mailed with Paul at em3ev.com earlier this month, he said he was carrying the new brake sensors that work with hydraulic brakes that are plug and play with the BBS02 kits. When I asked...
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    impressed with thunder 1220 300W 12S charger

    motomech: Thanks for the tip on fixing the T1220. Hope it's that simple. Worth checking out. At $95 for a new T1220, I think I will seriously consider the portable Cycle Satiator at $300.
  12. R

    impressed with thunder 1220 300W 12S charger

    I have been using the Thunder 1220 for over a year with good results. I usually bulk charge my 12s 36v 20Ah Lifep04 battery at 3 amps. Voltage differential is usually less than 100mv mainly because I have one cell#4 that charges to a lower voltage than all the other cells. Every 3rd or 4th...
  13. R

    Programming the Bafang Middrive BBS01+BBS02

    If anybody is still interested in a pre-made Bafang BBS-01/02 programming USB cable, BTN on AliExpress is selling one for $50.00 plus $17.85 shipping. http://www.aliexpress.com/store/product/8fun-bafang-center-motor-middle-drive-motor-kit-reprogram-cable/904105_1998539445.html Kind of...
  14. R

    New Bafang Crank-Drives

    Hello Melbourne. Thanks for the heads up on the AliExpress 11/11 day sale. I was just about to order my Bafang 36v 500w mid-drive from em3ev.com. Paul has been great answering all my questions on that unit and buyers on this forum highly recommend his company. However, I just couldn't pass up...
  15. R

    New Bafang Crank-Drives

    Thanks for the clarification. Let me try this scenario. Let's say I have a bike with a 48v 500w BBS02 unit powered by a 48v 15Ah battery. I then have an identical bike but with a 36v 500w BBS02 unit and a 36v 20Ah battery. Both batteries put out 720wh. Under the same conditions, how would...
  16. R

    New Bafang Crank-Drives

    Okay, now I'm really confused about the differences between the BBS01 and BBS02 mid-drive units. I thought the main difference between the two was that the BBS02 was a bigger motor able to handle more heat and power. I also thought the controllers were basically the same except that one was...
  17. R

    New Bafang Crank-Drives

    The BBS02 also comes in a 36v 500w version. I'm told the BBS02 comes with either a 36v or 48v controller and they may be using the same motor, but I'm not sure. See em3ev.com for the 36v 500w version. hi-powercycles.com even has a 37v 750w setup. I'm having trouble choosing between the 36v...
  18. R

    Help Bulk Charging with Thunder 1220

    dnmun: Thanks for the info. Questions for you. What type of failure are you talking about "during subsequent bulk charging"? Also, won't a BMS work basically the same way as balance mode in a smart charger? Both balance individual cells by charging and discharging cells to the specified...
  19. R

    Help Bulk Charging with Thunder 1220

    As you experienced, it is very simple to bulk charge with the 1220. Bulk charging is a lot faster than balance charging a battery pack. I usually bulk charge my Lifep04 A123 12s 20ah pack at 3amps and the cells stay in good balance. Deviation is within 50mv mainly because I have 1 cell that's...
  20. R

    Help Bulk Charging with Thunder 1220

    Found an interesting parallel charging board that might suit your needs: http://www.hobbyking.com/hobbyking/store/__28274__Parallel_Charging_Board_for_6_packs_2_6S_Bare_Leads_.html This would work for your charging cables and if you are doing a bulk charge. If you need to do a parallel...
  21. R

    Help Bulk Charging with Thunder 1220

    I'm going to add my 2 cents here since I want to understand this post. First of all, you do not connect the balance leads to the 1220 if you are really only doing a bulk charge of your 12s pack. However, you must then manually set the cell count parameter on the 1220 to "12" cells. Then set...
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    1220 Thunder power review and open comment

    By the way, my 12s pack's IR has been averaging about 60 micro-ohms over the last few bulk charges. So your cell IR values look better than mine. I'll record the individual IR values when I next do a balance charge. I know I've got one cell that's acting up and skewing the average. I don't...
  23. R

    1220 Thunder power review and open comment

    Hello Zip. Always a fun challenge trying to figure out what you are posting. Anyway, here's how the Thunder 1220 is working for me with my 12s 36v A123 20ah battery (no BMS). First set the Input Power to 500 watts since the 1220 uses the required wattage from the PSU up to the max of 500w...
  24. R

    12s bulk charging

    I have the Thunder 1220 charger. It can be used to both bulk and balance charge your battery pack. The 1220 will "guess" the number of cells that it detects and you need to be sure it is the correct number or else you need to manually adjust it. My 1220 usually "sees" only 11 cells in my 12s...
  25. R

    Thunder 1220 and power supply question

    This is my post from a previous thread: http://www.endless-sphere.com/forums/viewtopic.php?f=14&t=46249#p675342 I have a suggestion you might be interested in. Check out this website: https://sites.google.com/site/tjinguyte ... ects/HP47A You can buy 2 HP power supplies on ebay for about $30...
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