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  1. C

    Prius Gen2 battery replacement and conversion

    I have a 2008 gen 2 Prius with an original NiMH battery. The battery is aging and milage is not what it used to be. Has anyone had experience replacing these batteries with lithium cells, or perhaps running a lithium battery in parallel with the existing battery? I'm also looking at options to...
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    Cell Weight as a measure of quality

    I've recently bought a box of 160 new QB18650 12A cells and will only use 144 for my build. So I'm trying to quickly weed out the worst ones. I don't have an accurate way to test quickly so am wondering if there are any other properties that could identify the weaker cells. 90% of them are...
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    Jbd bms SP17S005 smart BMS issues

    I've bought a JBD smart bms recently and have rigged a primitive16s1p test board with old cells to test the functions. Including abnormal states like over temperature and unbalanced cells. I Soldered all the balance wires onto the cell holders and have wired up b- according to schematic...
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    Imax B6 V3 / V2 balance charger vs ICharger and ToolKitRC

    I have fried my Imax B6 V3 charger by momentarily connecting a 5S pack with incorrect polarity on the output side. It beeped and notified of wrong polarity before emitting the magic smoke. I opened it up and found a small mosfet had been fried. It still powers up but says "Connection Break" when...
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    16s9p or 17s8p?

    I'm running 9c 7x9 motor, 45A green time controller on a hardtail with 26" wheels. I do use regen and have been riding this setup for about 2 years. I want to go up to 50km/h and mostly ride streets with some hills. I'm interested in range and battery longevity over speed/torque. My current...
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    Stuck bearings on 9C 9x7 motor

    I noticed play in the bearings while riding, after some procrastination I've decided to do some maintenance. After removing the side covers from the motor I've found one of the bearings is very stuck on the motor axle (non-drive side). I've had a go at tapping this bearing out, and the outer...
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    Custom length spokes and bending your own "J" end

    I'm waiting on spokes to arrive via postage and thinking about other ways to adapt spokes for custom length. It's been fairly time consuming to get spokes short enough for a DD motor in a 24 inch rim. Why there so much discussion about thread rolling machines to customise length, it sounds...
  8. C

    DIY spot welder Transformer inrush current?

    I'm trying to build a spot welder using a transformer and the following "100A LCD" timing circuit (not purchased yet)...
  9. C

    Axle Thread and Motor Restoration

    I've bought a used motor for cheap, the seller reckoned it was working fine before coming off his bike. I have some doubts and am trying to decide if it's worth working on. It is a large DD motor, I've opened the side cover and the windings look ok, but the laminations and rotor magnets appear...
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    How to change voltage on 16s charger? No trim pot

    I ordered and recieved a charger from ebay that's supposed to be 67.2V for my 16S battery. Measured open circuit, it's giving closer to 70V :? . I don't know if it will actually charge my battery to this level, and really do not want to find out the hard way. I trust the multi meter but don't...
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    Bosch 36V Drill pack cell replacement, no BMS??

    I have an old (2009) GBH 36 VF-LI Bosch hammer drill but the battery has very low capacity. I would like to refurbish this battery for use with the drill. I opened the battery to find a 10S 2P arrangement, with no cell balancing wires at all, there are only two heavy gauge wires going to the...
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    Greentime Controller 15 Fet Regen Stops working at top of charge

    I've setup regen on my Green time controller using a reed switch and magnet mounted on my hydraulic brake calliper. It works great while pack voltage is below 58V. Above 58V, there is no regen. Can anyone tell me how to modify the controller to enable regen at around 60V? I'm running a 14S8P...
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    Spacer for freewheel on 9c motor

    I had to use a spacer shim to attach my 7s freewheel onto my 9c Hub, to allow the freewheel to rotate. I used a 1.5mm wide shim from a cassette as a spacer, the shim works and the freewheel now rotates. I'm a little concerned that this might cause issues down the track due to increased...
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    9C 9x7 motor axle too short for torque arms?

    The 9C 9x7 motor I bought to replace my fried generic DD has much shorter axle length. After attaching my freewheel, there is insufficient room to add even a modest 3mm thick torque arm, and still have enough threads to properly attach the axle nuts on the drive side. The part of the axle...
  15. C

    Fried DD Motor, replace Stator only?

    I've fried my first motor! It's a "Voilamart" type rear hub motor going up a long hill with a heavy load. I'm running 52V with a 16Amp ebay controller. I've managed to get the stator out of the rear hub and the magnets on the rotor are intact. The stator has several burnt looking poles. The...
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