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    Calibike 18650 pack repairability

    dogman, I wish I knew why my Ping and Headway's failed. They were not run hard and were protected with a BMS. The Headway's were bought new from a shop that did electric car conversions. He ran out but I found cells at Headway Headquarters that ships from a US location. The pack was kept...
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    Calibike 18650 pack repairability

    I'm talking about a commuter battery. A battery for day in, day out use that won't burn down your house or workplace. A battery you can leave unattended. That isn't Li-Po. Can a Calibike pack be repaired? Will a single cell failure effectively trash the pack if you do not have the means to...
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    Calibike 18650 pack repairability

    Calibikes is offering a 48V 15AH Li-ion pack that looks like a practical plug and play commuter battery. From the label it is a 7p13s pack implying it has 91 18650 cells. (Battery label says 52 cells. I do not understand how a 7p13s battery can have 52 cells.) That seems like 91 chances for...
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    Nuvinci developer kits for cheap

    I pondered how to adapt the splined hole shifter to square input shaft when I realized this part turns slow with little torque. I machined an aluminum adapter with a round hole and 2 set screws gripping the square shifter rod end. This solves the "how do you make a square hole" problem. The...
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    Cheaper batteries than ping?

    I have been running a 48V 20 ah Ping for 3 years on a commuter bike drawing less than 1C. Unlike Dogman, I have had repeated failures. Yes, Ping has been responsive but the cells and BMS still failed. The cost of shipping replacement parts, downtime, and hassle of cutting out bad pouches and...
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    Anybody ever opened up a Kollmorgen 300W

    You are right that the pressed in shaft came loose from the rotor. Carefully cut away the glue holding the internal circuit disc in place. Remove snap rings on the exposed stub shaft. The rotor is shaped like a cup. Don't drop the rotor. The ceramic magnet is fragile. I used 10mm ground...
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    New RC Motor Run About Cycles

    Run About Cycles displayed an RC-motor based mid-drive system at a large bike parts swap in Denver, CO. Joshua Kerson of Custom Electric Cycles, Inc. (http://www.electric-cycle.com) has put together a drive system he described as 750 watt continuous output with 2000 watt peak power. It runs...
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    Where to get Circular Connectors?

    Try Digikey. http://www.digikey.com
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    Ping pack. Worry free, fool proof?

    Order a 5A charger from him as well as the little one. Put them in parallel for a fast charge. Oh yeah. I abuse the battery with 10A (0.5C) charges. If you ventilate the BMS, it seems happy. SteveR- What is the Ping V3 battery? What is different compared to the V2.5? I have two 5 amp...
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    How much interest in a 2.5kg 40kv sensored outrunner

    I am in for a one of these motors. I want to drive a Nuvinci hub with single stage reduction.
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    Ping pack. Worry free, fool proof?

    These forums are full of Lipo discussion. Five years ago it was Optima SLA. Then NiCad and NIMH. A few years ago LiFePO4 came on the scene with questions about "Duct Tape E-Bay batteries." Batteries once thought of as cheap are now the well regarded Ping battery. Lipo is powerful but not...
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    Luxembenter Recumbent commuter

    1. Do you have build pics too? 2. Can you provide all of the critical dimensions and angles for someone wanting to build one? 3. Any quirks in the handling? What about at higher speeds like going down hills? 4. Why did you settle on the battery in the trunk, since it looks like you have a...
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    Luxembenter Recumbent commuter

    This is my homebuilt recumbent commuter. I call it Luxembenter because it is a luxurious recumbent. I've ridden it 6500 miles over 4 years. Drivetrain started out as Kollmorgen 400 watt mid-drive using NIMH cells. It was unreliable. Now it has a ordinary Crystalyte 408 hubmotor and Ping 48V...
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    lipo noob questions

    Is a a low voltage cutout board necessary if you have a Cycle Analyst programmed with low voltage setting to protect the pack? Granted the CA can't protect individual cells...
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    Bulk Charging Lipo's with LiFePO4 charger

    Dogman, I like the idea of bringing a simple charger on a long ride to grab watt-hours here and there. Charging would be done based on Cycle Analyst numbers. Denver has a good bike trail system. Saturday rides can go 60 miles. I'm often on the lookout for an outlet in a park shelter...
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    Bulk Charging Lipo's with LiFePO4 charger

    I opened my Ping 5A charger looking for an adjustment potentiometer to tweak voltage but did not see one. What should I be looking for?
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    Bulk Charging Lipo's with LiFePO4 charger

    My 48V 20AH Ping LiFePO4 is no longer serviceable. It might be time to go Lipo. I like the simplicity of Ping's but want more acceleration and better hill climbing from my Crystalyte 408 hubmotor. The forums show charging Lipo's to be much more complicated than just plugging in a Ping...
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    50 kV motor for Ping battery?

    I don't have an RC motor. That is my question. There are threads for 12 kW and 14 kW motors. They would need far more battery than a 1C Ping to reach anything close to their performance potential. (Ping's are claimed to be 2C. At 1.3C my Ping BMS lost its magic smoke. It was a long slow 22...
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    50 kV motor for Ping battery?

    This BMC motor is a candidate but not up to RC performance for weight or size. At 80% efficiency it's about the same as a Crystalyte hub motor.
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    50 kV motor for Ping battery?

    There are several threads on 10+kilowatt motors. All well and good, but what kind of battery can provide that much power for any distance? I've got a 48V, 20 AH Ping running a C-lyte 408 on 26 inch wheel. It can handle 2% grades but bogs on 4%. I want better hill climbing with top speed of...
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