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  1. bikezen

    Connecting new BMS to salvaged Bionix 13s battery

    Thanks for the reply, that's really helpful. I knew the card was a balancer but didn't really think that through in terms of over and under voltage protection like a BMS provides. Doesn't seem really practical to have two cards balancing the cells in a pack. I don't have the original BMS for the...
  2. bikezen

    Connecting new BMS to salvaged Bionix 13s battery

    Hi all, I've got two battery packs salvaged out of Bionix battery housings, 13s, 8.8AH charged to 52V. They appear to be sound once the BMS is removed. I want to replace the Bionix BMS with a load balancing BMS from eBay (https://www.ebay.com/itm/254285645186) but found the female JST block...
  3. bikezen

    Any hope for this 36V Lion frame mount battery

    Hi all, I have a relatively new battery pack, a frame mount Li-ion 36V, 10AH, marked as Model S-002. It's giving 0 volts from the output Anderson power poles. Taking it apart, it appears the pack has 37V on the battery pack where it enters the BMS card and 0 volts where it exits. Given this...
  4. bikezen

    Smart Pie V starts up with a jerk

    Doesn't a pedal first controller need a sensor to know if the cranks are moving? I don't have that on this system.
  5. bikezen

    Smart Pie V starts up with a jerk

    Hi all, I have a Smart Pie V motor coupled with a Luna Shark 52V battery. For now I have the motor in a wheel truing stand for testing. I had the motor installed on a bike briefly and found when I use the throttle, the motor goes from 0 to 1-2 mph with no ramp up. There's no gradation there...
  6. bikezen

    Seat post mounted battery

    Hi all, I am researching methods for mounting a 5AH li-ion brick to a seatpost or stem post on a folding bike. This type of bike has an extended seat and stem post riser so it's a useful place to put stuff, especially if you have no racks on the bike. Here's an example of this type of mounting...
  7. bikezen

    Uses for a Bionx battery pack with a dead BMS

    Is this a scenario where I could use a charger to apply a one time charge to get the battery up to charge? I guess there's some downsides to that in that some cells will end up overcharged or undercharged. Any caveats to this like not leaving the battery alone while this happens, for example...
  8. bikezen

    Uses for a Bionx battery pack with a dead BMS

    Okay, got 'er done. I've got 14 voltages ranging from 2.92 to 2.98, with 6 leads measuring 0 volts. Looking good that I've got a solid pack and now need to figure out how to connect it up to a BMS and then to a charger. That's a bit but looking doable. Any tips appreciated. Thanks.
  9. bikezen

    Uses for a Bionx battery pack with a dead BMS

    Thanks for the tips, icerider. I'll give it a shot. The terminal block is fairly small to contain so many leads. The holes for the female socket side are tiny. I think I'll try using pegboard jumpers, that should do it.
  10. bikezen

    Uses for a Bionx battery pack with a dead BMS

    Okay, thanks for the info. I've pulled out the pack, removed the card, installed some Powerpoles, and getting 36V on the pack. I tried measuring the balance connectors by re-inserting the terminal block into the card and reading from the solder points on the + side to the negative ground but...
  11. bikezen

    Uses for a Bionx battery pack with a dead BMS

    Hi all, I was given a Bionx battery by a bike mechanic who said the BMS card is dead. Bionx had remotely diagnosed this, disabled the battery and said it could not be repaired. The cells seem to be okay. I cracked the case and took a look. I'm reading 35, 35, 24 and 35V on a termination block...
  12. bikezen

    Extension for BBS02 speedo cable?

    Has anyone tried to make an extension by soldering in a length of wire? I have some soldering skills and am fairly handy. The vendors above are charging $20 for first class mail/slow boat from there locations outside the US. Not finding a similar cable anywhere inside the US.
  13. bikezen

    Water resistant connectors to replace 2.1mm plugs

    Hi all, I've been using 2.1mm plugs to connect 12V lighting on my recumbent. These plugs are okay, price is certainly good, but they are a bit bulky and not particularly waterproof. Can anyone recommend a better plug type than this. The 2.1mm plugs are ubiquitous, cheap, they come with a wire...
  14. bikezen

    Comparing two crystalytes

    Hi all, I've got two Crystalyte motors I'm riding and one of them is way less powerful than the other. I'm wanting to understand what's causing the difference in top speed. On system 1, I've got a 408/4011 motor, 72V controller, and a Ping 36V battery. The motor is only used on the speed leg...
  15. bikezen

    lighter weight motors for folding bike

    This Crystalyte really gets going at the high end. Aren't these 250 watt motors going to be quite a bit slower? I'm not saying that's a bad thing. When you are trailing road bikers while riding on a folding bike with a 25 lb+ weight (including battery) on the 16" front wheel, that's not...
  16. bikezen

    lighter weight motors for folding bike

    Hi all, I've got a Crystalyte 408/4011 on a Sun EZ-1 which I like. I've been testing a Crystalyte front hub motor (don't know the model) on a folding bike. It's plenty powerful but the weight leaves something to be desired. I'm wondering what models of hub motors would be a good application...
  17. bikezen

    Charger for ping battery and BMS replacement

    I've removed the battery so there's no connectors except one Anderson powerpole on the negative charging wire. I get 45V from the charger when there's no battery on it. The battery reads 39V. I've got the charger going direct to the battery with no connectors intervening. Still no change...
  18. bikezen

    Charger for ping battery and BMS replacement

    Hi all, I've just finished replacing my BMS card on my 36V 20AH Ping battery. Ping was pretty darned helpful through the whole process given we were emailing across half the planet and two languages. I had taken my battery out of the case and when putting it back gotten a small spark when I...
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