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  1. T

    sizing cell interconnections

    Hi, I am building a new battery for my dirt bike with 30s15p NCR18650PF cells. Currently the cells are connected with 0.4" x 0.006" (10mm x 0.15mm) nickel strips. The average total current draw is about 90A, but the pack should handle short peaks of more than 200A. I am unsure if an additional...
  2. T

    Prismatic 20Ah A123 battery module CAN bus communication

    I tried again with a can analyze tool and an ixxat usb-to-can device, but there are no messages on the bus. The communication with the arduino can shield works without problems. The cells with temp sensors are connected and the 12V enable line (pin1+ and pin7-) is powered from a separate...
  3. T

    Prismatic 20Ah A123 battery module CAN bus communication

    Thank you for clarification. Should I read any broadcast messages on the bus when the bms is connected? Could you provide the can messages for reqesting the cell voltages? tef
  4. T

    Prismatic 20Ah A123 battery module CAN bus communication

    Hi, I am currently trying to get the communication working with an arduino and a seedstudio canbus shield, but no success so far. Does somebody have an idea about pin9 and pin10 of the can connector? pin1...VCC pin2...VCC pin3...CAN HI pin4...CAN LO pin5...CAN LO pin6...CAN HI pin7...GND...
  5. T

    How to source a Turnigy 80-100?

    I found a source for the 180kv version (UK): http://www.giantshark.co.uk/product/169735/xyh80-100-a-180kv-brushless-outrunner-eq-70-55
  6. T

    Prismatic 20Ah A123 battery module CAN bus communication

    hi, any news regarding A123 BMS can protocol?
  7. T

    MeO913 with two controllers

    hi everybody, I am converting an electric outboard motor to electric. (see http://www.endless-sphere.com/forums/viewtopic.php?f=39&t=40553) The motor is a dual stator brushless motor. I think about using 2x sensored 36Fet EB236 controllers, one for each stator. Could this lead to timing...
  8. T

    Motor with 2x 5 wires. Dual set of halls?

    I have a kelly 6 kw "super power motor" with two sets of halls, both are 120 degree.
  9. T

    Advice on ARP18650M1A battery pack

    I had no problems with soldering A123 18650 cells that way. The plates are 0.6mm copper. I use a 120W soldering iron with a heavy flat tip and always tin the cells and plates (both sides) first, so that there is the best heat conductivity. I never heat the cells up for more than max. 2 sec, a...
  10. T

    foundingpower programmable bms

    looks good! does somebody know if individual cell voltages are written through the serial interface, or just the total voltage?
  11. T

    e-outboard fishing boat project

    Hi gordo, I know that this setup will not be very efficient but that is ok for me, as long as I get a range of at least 20km at a reasonable speed. The battery bank will be used primarily in my photovoltaic system, so I need that much capacity anyway. I wish that I could install a larger prop...
  12. T

    e-outboard fishing boat project

    Gordo, thanks for the link. Yes, I will use 20kwh instead of 12. The goal is to hold 30km/h for an hour.
  13. T

    e-outboard fishing boat project

    It's time to give a little update on the electric boat project. I have bought a used 4.1m fiberglass sportboat hull. Apart from the transom, which needs to be rebuilt, it is in a good shape for its age and will hold up fine for the next few years. The saved money compared to the boat in my...
  14. T

    e-outboard fishing boat project

    thank you, I will keep you up to date.
  15. T

    e-outboard fishing boat project

    Hi, ### edit: I changed the plan and will convert an old outboard motor to electric. I replaced the combustion engine with a ME0913 motor. ### I think about building two (separate) electric outboard motors for my future fishing boat (details...
  16. T

    A123 20Ah Pouch Cell Packaging and Cooling

    What do you think about casting them in polyurethane like jack richard did? I thought a long time about methods for packaging and connecting them together. So far, casting is the best (most stable) solution for me. I have ordered 60 cells for my scooter and will connect them in 30s2p. I think...
  17. T

    Lipo not so dangerous....

    I was riding my scooter with A123s, maybe that was the mistake :? .
  18. T

    Lipo not so dangerous....

    Ater a few hours all metal parts started to rust. The wooden furniture was just before catching fire and is not useable anymore. It took us weeks and a lot of money to clean and repair or replace most of it. We were lucky that I parked the car outside. That is exactly what I wanted to do...
  19. T

    Lipo not so dangerous....

    It was fiberglass and epoxy. I checked the cell voltages on a regular basis, so I did not attach the sidecover :( . some pics:
  20. T

    Lipo not so dangerous....

    I soldered the main discharge leads and paralleled the balance wires with the JST-XH plug of each pack on a stripboard. Is it likely that a cell shorted "immediately" and got all the current from the paralleled cells? no puffing, no warning signs I measured the capacity of each pack before I...
  21. T

    Lipo not so dangerous....

    I will never touch a lipo again. The bike with 2.4kwh of zippy lipo packs was not used for a week and always monitored (cell level) during charge and discharge. One day at two o'clock in the morning, we had a large fireball in the garage. I highly recommend using a fiberglass battery box for...
  22. T

    Cell matching software

    I uploaded the latest version. If you have not installed java, here is the link (win): http://java.com/en/download/inc/windows_new_xpi.jsp Run it with "java -jar path\to\CapacityMatcher11.jar" from the cmd window if starting with a double-click does not work. I hope it helps. tef
  23. T

    Cell matching software

    hi, I have written a java application for capacity matching of my A123 cells but focused mainly on capacity balance, so please don't expect too much, the ri part is available but not very well thought out. The application reads textfiles (.txt, .csv) with cell id, capacity in mAh and ri in...
  24. T

    A123 - Battery newbie. Some questions.

    just my experiences: In 2009 I bought two 36V 20Ah Ping packs. After max. 30 cycles (30A ebike controller) more and more cells were leaking. A few cycles later nearly all cells were swollen or leaking and I had to throw them away. I installed 3.2kwh of used A123 18650 and 26650 cells in my...
  25. T

    scooter hub motor - hall sensor placement

    hi, You are correct, I swapped the middle hall. The reason why the first screenshots look normal is that I used the hall tester from lyen and rotated the wheel manually. With the controller attached I get the error on Hall A as you can see in the last image. I even connected a new hall directly...
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