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  1. T

    Phaserunner V1 issues - Maybe you can help?

    Hi, When the original PR came out, I bought several of those units with the mechanical switch and the molded battery+motor wires. I quickly discovered, that when you apply a regen phase current, the controller randomly will power-cycle itself, causing a short (but potentially very dangerous!)...
  2. T

    Where to get ORIGINAL Anderson Powerpoles for someone outside America

    Hi, I am running out of andersons soon. I used to buy them at Grin along with my orders, but just to ship an order with those connectors would be extremely expensive. There are some online shops, based in the USA, that sell original andersons too, like https://powerwerx.com/ but they also ask...
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    Cell voltage via BMS terminal sags while current is flowing

    Hi, I have a 24S A123 battery I have built myself, by using the common screw metal tabs with M5 screws for fastening. I attach a picture of a battery during assembly so you can see what I mean. Since each tab has two screws, then each side of the pack is terminated with two heavy gauge wires...
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    Real-time cells voltage display instead of BMS

    Hi, As I manually balance my A123 20Ah pack for 4 years, and as they slowly age, I wanted to have an onboard voltage monitor which shows all 24 cells at the same time. I already have a big handle-bar bag which is secured firmly and I have plenty of surface area on it to mount any voltage grid...
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    Grin's MXUS 6T cassette-hub issue

    Hi, I bought from Grin their MXUS 6T some time ago: https://www.ebikes.ca/shop/discontinued/mx3006rc.html It was one of the few at the time that came with the modern cassette-hub. That freewheel had some strange noises in addition to the normal pawl clicking noises right from the start but I...
  6. T

    Tektro HD-E350 hydraulic e-brake issue

    Hi, I am using Tektro hydraulic disc brake that has a built-in e-brake signal switch. I have it on all my e-bikes. They are identical to Shimano - using the same calipers, priced the same, and work great as kinetic-energy robbers. However, I noticed, recently, that the latch-in/latch-out point...
  7. T

    PhaseRunner without Plug-Braking

    Hi, I understand that newer versions of the PR, come without plug-braking. That is - regen intensity diminishes as you approach zero speed, but at no point a positive current will be drawn from the battery in order to provide that negative torque. Plug-braking cannot be disabled via the software...
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    BMS "steam release" post

    Hi, This post is a bit "steamy", so I warn you beforehand. It's just that I feel kind of hopeless, so I thought to ask the community, and I am almost 100% sure that someone on ES had the same needs and found a solution. I am still using my A123 20Ah prismatic cells without BMS for 4 years by...
  9. T

    Paralleling LiFe with Li-Ion - How to match the discharge curves?

    Hi, My main battery is A123 79V 20Ah. On long distances, I add 72V 23Ah Li-Ion battery with GA cells which on the paper is excellent in capacity and supplement the more powerful (but heavier) A123. On practice, the A123 has a flat discharge curve (~3.3V through most of the SOC) while a standard...
  10. T

    A Phaserunner-like controller with 12FETs ?

    Hi, Anyone know of such animal? A controller which is sinusoidal, voltage->torque mapped, can actually PERFORM regen WELL (unlike the Infineons), and can be fully programmed. Grin doesn't plan on making a bigger version soon...
  11. T

    Considering BMS (or just monitoring) for LiFe cells

    Hello, I use 20Ah A123 prismatic cells on almost all my E-bikes. I never used a BMS, since the cells are very similar to each other, and I do a check-up and an individual 3.6V top-charge every few months. Recently I start to think over about the BMS thing as the cells start to age (6 years but...
  12. T

    An idea how to make sure there is no ingested water inside a motor

    Hi, No matter what tight sealing you have, water/humidity will always find it's way into a motor due to pressure breathing. I've had two ideas how you can negate the water issue. 1. What if, after every rainy ride, you would induce the motor's windings to a series of heating&cooling phases by...
  13. T

    Charging two 36V batteries using the Cycle-Satiator

    Hi, I bought two Hailong 36V23Ah packs from Grin, and these are configured in series (with pass-diode) at 72V. Using two 72V5A Satiator chargers would let me max out the chargers at a steady 720W (360*2) from 50% SOC and above. (3.6V@cell@50% - 20*3.6=72V * 5 = 360W for each unit) The problem is...
  14. T

    How to make EVERYTHING truly waterproof

    Hi, What contraptions/installations you use to prevent water from reaching your entire electric gear on your bikes? I am mostly talking about the Cycle Analyst JST connectors, but also about throttles, any handle-bar mounted switches, and of course the motor. I am using a GrinHub on the front...
  15. T

    A portable gasoline generator for long range

    Hi, For short rides without pedaling, or long ones where you do most of the pedal work at slow speeds - the current Lithium batteries are enough. But for very long ranges, or if you want to be able to cover a huge distance as a commuting route and do it fast (like 40-50kph), batteries are not...
  16. T

    Why do Fat-tires have higher rolling resistance?

    Let's compare two tires - one 28x2inch wide and the second 26x4inch wide. (so both would have more or less same circumference and so we can take the circumference out of the discussion) Let's also assume that both tires are made from the same compounds and have the same thread pattern for road...
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    What's the best E-bike bicycle type for touring+camping?

    Hi, I have two ready E-bikes and I wonder which one should be better for long distance touring trip. I want to discuss it from several points of view: Mechanical longevity (mostly from vibrations and road shocks to the motor, battery, and the cargo), how easy it is to source parts, frame...
  18. T

    My theory of how to max-out the lifecycle of Li-Ion batteries

    Hi, Now that I start working with mortal Li-Ion batteries (non A123's - My 7 year old A123 has lost only 20% of it's capacity, but sadly they are not available anymore genuinely), I have learned a lot about them and how you can greatly increase your life-cycle. (not just the known rule to top-up...
  19. T

    Before paying 2000$ to Osnpower - Can I ask your opinion?

    Hi, After being very happy with my 26650 A123 cells (lost only 20% in 7 years and still goes under heavy usage) and my A123 20Ah prismatic cell's performance, I am about to buy some more cells for my future builds. My current A123 20Ah cells are C grade cells - with 18Ah capacity and short tabs...
  20. T

    Where to get -FULL- Fat-Bike fenders?

    Hi, I am looking for full cover fenders, not short one which are just "boards" or "wings" and doesn't actually prevent water from being splashed towards your legs and into the triangle area of the frame. Something like this...
  21. T

    Cooling vest for hot&humid conditions

    Hi, After reading some threads here where different vests were briefly mentioned, I thought it would be effective to start a dedicated thread for it. The problem with reading about different vests on different websites is that they are based on subjective opinions and the full technical specs...
  22. T

    Removable method of securing motor's axle nuts

    Hi, The lock-nuts on my H3525 come loose all the time because of the very powerful torque it can provide + changing between forward torque&regen + the road vibrations due to the high tire pressure. I have tried applying a special glue for holding metal-to-metal but it also eventually came loose...
  23. T

    Why Li-Ion cells have huge difference between their charge/discharge rates?

    Hi, Can anyone explain why the huge differences? For example, MG1 cells can be charged at ~0.5C but discharged at ~3C with no problem. Further more, many LiPo's (or as I call them - gunpowder :mrgreen: ) can be discharged at a whopping rate of 90C but only charged at 0.5C~1C or so. Chemistry is...
  24. T

    Panasonic NCR18650GA disclosed specs, and 30Q Samsung cells

    Hi, I am considering this battery: http://www.ebikes.ca/shop/electric-bicycle-parts/batteries/b5216-lim-dt.html I wanted to find more detailed specs about those cells, but the official ones are very, very shallow. For example, it writes only "standard" charge rate at 0.5C, and I am interested...
  25. T

    A123 20Ah prismatic cells got expanded - What can be done?

    Hi, I use those cells on all my E-bikes. I wrap all of them into a battery pack using several layers of gopher tape, which proved very well for applying the required pressure upon the cells. (I apply pressure by hand when I wrap them, as they require to be pressurized a bit) Yesterday, I...
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