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  1. T

    I almost burned my condo down today w/ my battery pack

    Ya, batteries kinda scare me now :shock: That's a good thing, I guess. I'm thinking about getting a fireproof blanket to wrap around my 15ah ping-battery on the back of my bike. But then again, it is LiFePo4 so maybe I'm good. In any case, the old pack that almost started the first is sadly...
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    I almost burned my condo down today w/ my battery pack

    Ya, good point, LiMn is relatively safe. The fire danger was more from the two paper grocery bags and the carpet (ya, I just set everything on the carpet :shock: ) that the battery was in contact with. It burned a hole through both bags and started to burn into the carpet. Pics coming once...
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    I almost burned my condo down today w/ my battery pack

    I got home from work a little while ago and started cooking dinner. I began to smell a very acrid smell, like burning rubber or plastic. The stove was smoking a bit, so I figured this was the culprit. About 10 minutes later, and my eyes are starting to burn from the acrid stench in the air. I...
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    Broken bike, motor acting weird

    When the throttle went crazy, I pulled the main battery wires. When the battery in unplugged, the bike rolls without resistance. The comment on bad fets sounds like a good bet. I've had a few controllers go bad from burnt fets before. I'll take a look.
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    Broken bike, motor acting weird

    The other day, my bike started acting crazy. I was on a ride and the motor went up to max speed with no throttle response. I had to reach into my pack and frantically yank apart some connections to slow the thing down. I've reseated all the connections, and now, it's behaving unlike anything...
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    Testing for bad cells in parallel configuration?

    The problem is either with the BMS or the battery cells; based on the BMS cutting power after about a half second, I diagnosed it as a faulty cell or cell group, though I might be wrong. Gotta start somewhere. Plus I called Batteryspace and the engineer said it was likely a faulty cell after I...
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    Testing for bad cells in parallel configuration?

    I'm sure it's here somewhere, but I'm really tied of looking :? I have a batteryspace LiMnNi 36v 12ah pack that stopped working last week. It will actually put out just a little juice, but any significant load, and it cuts out completely. I believe the onboard BMS is tripping because one of the...
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    Anyone designed a cyclone motor guard yet?

    I know, old thread... but just put the motor in the triangle/frame of the bike. Let the bike be the bash guard. I don't know why people keep hanging these below the bike when they could just put it in the frame...
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    Nuvinci N360 hub

    Thanks for the response, Phil-- cleared up everything. :D I can't wait to hear my cyclone in action-- it's currently sitting on a shelf waiting for a suitable bike. As for the Nuvinci N360s... these things are amazing! I think Fallbrook Technologies is sitting on a very valuable and...
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    Nuvinci N360 hub

    I'm glad I found this post-- I am planning on using the N360 and my 900w Cyclone kit in my newest full suspension build. A few questions: 1. How did you arrange the cyclone throttle and N360 controls? Aren't they both supposed to be mounted on the right side of the handle bars? I imagine you'd...
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    Power and Control Connector-- All-in-one?

    Awesome, thanks for all the useful info :D I saw several that should suit my purpose.
  12. T

    Power and Control Connector-- All-in-one?

    Within the connector/plug, I would need three main power connections (capable of 40ams) and 14 small control connections. After some looking, I found that they're called hybrid power data connectors. I haven't been able to find one to suit my purposes... yet.
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    Power and Control Connector-- All-in-one?

    I'm tired of googling... and I haven't found what I need. Here's the end goal: one plug that connects power and control wiring. The thing is, the power cables are thick and running at 40amps, and the control wiring are teeny-tiny running low loads. I want to be able to connect ONE connection and...
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    Using Right Angle Reduction Gearboxes

    John, angle grinder or angle drill, how would you go about replacing the motor? After looking at exploded part diagrams, it looks like the pinion gears on a lot of these things are attached straight to the stock motors. I would love to hear how you would select your motor and rig it into the...
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    Nine Continent hub motor and vertical rear dropouts

    My initial reaction was "Ya, go ahead and bend the frame a few mm-- just try to stabilize the welds so they don't stress and crack during the process." If it's only a few mm to bend, you're probably fine, but after a bit of googling, I think you should do a bit more research before making a...
  16. T

    Nine Continent hub motor and vertical rear dropouts

    I ran into the exact same problem when I was installing my rear 9 Continents motor on my bike. I contacted the seller, and he advised me to bend the rear dropout arms to accommodate the extra width of the hub motor axle. I was apprehensive to do so because I didn't want to harm my beautiful...
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    Using Right Angle Reduction Gearboxes

    The angle grinder is pretty much out of the question for the reasons you described: they have a low gear reduction and spin at around 10,000rpm. The angle drills, otoh, spin at below 2000rpm and have a reduction of around 10:1. Stick a low RPM motor in their and chop the voltage to 36 volts and...
  18. T

    Using Right Angle Reduction Gearboxes

    After some thought and playing around with an angle grinder, I think it's probably not the best candidate for ebikes-- they aren't designed for the high output loads that we seek. Then it came to me: what better tool than a right angle drill or hole hawg :shock: They are geared at a much...
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    Using Right Angle Reduction Gearboxes

    I've spent the last 1.5 hours on a treasure hunt following the links posted here. Thanks! It looks like I'm not being very innovative with my inline right-angle reduction gearing ideas-- there is a lot of thought and experimentation in the area. A heavy duty angle grinder shows a lot of...
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    Using Right Angle Reduction Gearboxes

    I'm getting ready to build my second ebike-- a full suspension, Astro 3210 powered offroad beast-- and I'm trying to figure out how I'll go about gear reduction. Some of the two stage reduction units on ES like Matt's are gorgeous, but I wonder why we can't use commercially available reduction...
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    LiPo in a Backpack-- Can I make it Safe??

    This idea is based on the concept of backpack-mounted batteries for a number of beneficial reasons that frame-mounted batteries cannot provide (given, they both have their points). I will start looking at safer chemistries... and I've never even heard of the cell-man packs, so I gotta check...
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    LiPo in a Backpack-- Can I make it Safe??

    Hey guys, it's good to be back on here! My next project, which I posted about a while back, involves putting the batteries and controller in a backpack with a tether going out to to the throttle, motor, and lights. This would be for a full-suspension, offroad ebike application. I've been...
  23. T

    Bosch fatpacks

    With three in parallel (or even just two), everything works A-ok... I guess that motor is drawing too many amps and causing the LVC to be reached. Here's my original post on using just one: http://endless-sphere.com/forums/viewtopic.php?f=3&t=8767
  24. T

    Bosch fatpacks

    I was buying these Fatpacks for $46 on ebay a year ago (with FREE SHIPPING). Can you believe that?! I bought three, but now it seems they've gone up $20 a battery which is still a damn good deal. My only curiosity is that I tried using one Fatpack with my Ampedbikes kit-- 23amp controller and 9...
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    My new $100 Craigslist bike. The Moto-Guzzi of e-bikes??

    Good god, you gotta love the Italians. They know how to make something beautiful. Did you really get it for $100???!!! If so, this is an amazing deal.
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