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  1. S

    Homemade Battery Packs

    And that's why I don't like spot-welding them in place. I use compression clips so I can easily remove any cell.
  2. S

    Low voltage application for alternative home power

    Hi Folks, I'm running solar in my home, and am tied to the grid to back-feed energy I don't use. This works great for balancing costs, but still a slave to the grid. If I lose power, I'm still out. What standards are available for high-efficiency low-voltage applications for wiring a home...
  3. S

    Lipo and 18650, I was shocked

    Like I said, I've had a lot of luck running my 18650 (recycled laptops) batteries, and at only 2p was very stable and no hot spots anywhere. Checked with infrared thermometer on each and every battery. Now, this is with springs holders too. The new compression clips will carry significantly...
  4. S

    Lipo and 18650, I was shocked

    Right, that's why I keep all 12s in a single bank, so there will never be enough current draw to cause that issue.
  5. S

    Lipo and 18650, I was shocked

    Here's a photo of what I've got so far... I'm looking to build-in a 12s charge socket and Anderson power pole adapter right off the end of the pcb. This will allow me to build a box that I can slider the pcb into, and easily remove for charging or maintenance.
  6. S

    Lipo and 18650, I was shocked

    I've had much success with 18650 batteries. I'm developing a new 12s 2p PCB based off the following: http://www.aliexpress.com/snapshot/315573261.html These compression clips are much better than the typical spring clips as the compression clips place more force and has a higher contact area...
  7. S

    Brushed permanent magnet starter motor to play with

    Hi Folks, I've had my starter motor replaced, and asked to keep the original part. I found that the only thing wrong with the motor was the brushes wore out due to oil getting inside. I was going to drop by the parts store and get a new set of brushes for it. I don't have a lot of options...
  8. S

    Removable wheel hub motor

    This is exactly what I was looking for! Good point on the geared motor. Reason I went with DD is for regen braking, but from what I've read, regen doesn't offer u much, especially with my li-ion battery setup.
  9. S

    Removable wheel hub motor

    Hi folks, Not sure how to classify this thread as it's more of a versatility question. I have a front wheel drive wheel hub motor and wanted to make it easier to detach for days I want to go powerless. The motor adds a slight resistance and I don't want to bike to far with it attached and no...
  10. S

    Scalable BMS

    So I'm a little confused, because 36v divided by 4 is 9. 36v pack would be 9s wouldn't it? 12 times 4 = 48 so 48v would be 12s. So fully charged my pack reads about 51v. I would think u would grossly undercharge a 12s pack for a 36v system.
  11. S

    Scalable BMS

    My motor/controller is 48v rated and accepts 52v fully charged battery like most 48v systems do.
  12. S

    Scalable BMS

    Bump
  13. S

    Scalable BMS

    Hi folks, I've built a 48v 12s 6p battery out of 18650s and am extremely happy with the performance. Now I'm looking for a simple way to charge and scale up as I am intending on going 8p soon. So I'm thinking a 12s 2p PCB BMS would be ideal as I link the batteries in 2p banks. I'm having a...
  14. S

    Amp meter from amazon

    And so incredibly bulky too in comparison. Wanted something a little more inconspicuous. I find the numbers on the LCD screens a bit too small too. This one i posted is no more than an inch tall, but the display of the numbers are still larger than the more expensive units.
  15. S

    Amp meter from amazon

    I'm not sure what you mean by less desirable. For me, I find those hobbyist amp meters far less desirable as the LCD displays are far to dificult to read at a glance while riding the bike. Not to mention glare and backlight issues. This meter is the easiest to read. Accuracy is not as...
  16. S

    Amp meter from amazon

    Yeah, I saw the test voltage and not the working voltage. Oh we'll, this won't work on my bike. Maybe I'll use it in my car.
  17. S

    Amp meter from amazon

    Hi folks, This may or may not be obvious, but I am looking for a wire diagram for this guy: http://www.amazon.com/gp/product/B00CQHNKU2/ref=oh_details_o03_s00_i00?ie=UTF8&psc=1 I can't afford to mess this up working with a 10A 48V system. Thanks in advance.
  18. S

    Building my first 48v 18650 battery

    Tested my new 4P pack the other day on a 26 mile round trip with pedal assisted. The pack proves very stable. Added fuse bank and manual cutoff switch for safety. Collected several more laptop packs and will be working on my 6P pack shortly. My final challenge will be charging. Still...
  19. S

    Chainless electric bike (alternator)

    This bike really drove up my curiosity... http://www.gizmodo.com.au/2012/10/this-chainless-electric-bike-makes-you-the-backup-generator/ I've had a peaked interest in an electric recumbent trike and was thinking of a diy due to the costs. One of the larger problems with recumbent bikes are...
  20. S

    Found LiPo battery

    Oh, thanks for the offer. I'm actually re-purposing laptop 18650 batteries for my ebike. A co-worker of mine knew this and found this battery. I was only curious about it. Not really sure what I'll be doing with it, but I like the stability and safety of the 18650 batteries. I would...
  21. S

    Found LiPo battery

    I found the original. It's called the PowerPad 160: So, I should be able to charge this one good cell to 4.2v? I should be able to use my 18650 Li-Ion charger safely I suppose?
  22. S

    Found LiPo battery

    I disassembled it and pulled out the individual cells. Clearly, one is in good shape, and it does hold a charge. The battery array was rated at 19v output. I'm assuming this is in series. There were four cells in total, so should I suspect that it's a 5 or 6 volt battery? Do these cells look...
  23. S

    Fire flasher 48v for lighting

    ...LOL!! ROTFL!!!
  24. S

    Fire flasher 48v for lighting

    Company clearing out lot's of electronics, and found a couple of fire flashers not unlike this one... http://www.freeinteractivelearning.com/lessons/Intro_to_nec/fire_flasher_1_1.jpg Turns out they are 48v, which is perfect for my ebike, and it works! I may need to get a red or amber light...
  25. S

    Looking at new bulk charging option for 18650

    Yeah, not too concerned about that. I get the batteries free. I wish they had a 12s. Looks like I'll need to do 3 x 4s to get my 48v. I may just buy one for testing and see how well it functions.
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