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  1. jerrypa

    Battery pack on Panasonic NCR18650B cell

    Nice work :) I try to make battery with recycled laptop cells. Quite same thing than "Fu*k, fu*k, fu*k..." ;) I wondering that maybe one important thing is that i should find same kind off cells for parallel? If there are in series different kind of cells pack will be that weak than the worst...
  2. jerrypa

    bms saves battery, now what?

    charger
  3. jerrypa

    bms saves battery, now what?

    Now i found few laptop batteries. Maybe this give little life for the battery. Fast review show that there are couple good(read better) Sanyo cells (i hope ;) ). Cell type 1. SF US18650GR T 8A1130H26D 2. UR18650ZT R1122 P37C SANYO 3. ICR18650-26C SAMSUNG SD1 B23 4. UR18650FM M50A SANYO 5...
  4. jerrypa

    Good Batteries?

    Can you post a few pictures ;) Safety Ease of use charge cycles Maybe Lifepo4 are too expensive to use and they are not so easy to use (in line).
  5. jerrypa

    Good Batteries?

    Are Golden motor batteries good ones? Top Quality LiFePO4 Battery Pack for Electric Bikes 36V12AH http://www.goldenmotor.com/batterypack.htm Or I can throw a coin and buy cheap one...
  6. jerrypa

    New Bafang Crank-Drives

    Thanks. This helps a lot. In fact, I don't connect the brakes and throthle at all. Perhaps the uncoupled connection was only wet.
  7. jerrypa

    New Bafang Crank-Drives

    I have C961 and i think that you can not adjust the power level. I think it will adjust only speed level? :( Have anyone found a good english manual for C961? (One morning after rain my bike gives error code 4. After 40m ride its started work normally. Was the voltages to high....etc.)
  8. jerrypa

    New Bafang Crank-Drives

    Have anyone found good video where these C950 and C961 are together? I understand that the and biggest difference is the separate button panel for C961?
  9. jerrypa

    New Bafang Crank-Drives

    I have looking around the 250W 36V newest system. How i can be sure that i am buying newest model? Any links to sellers how ship it pretty fast to EU?
  10. jerrypa

    bms saves battery, now what?

    I measured the resistances easy way. And I am not wiser yet. Few seems to be weaker..mmm. Here is the reason why I have to separate the parallel cells for better results (when i have time). Parallel resistance do not have big differences even the other (R1) resistance is wery big...
  11. jerrypa

    bms saves battery, now what?

    So as i thought that i have to measure the voltages under load. I think that i don't have to calculate the resistance, voltage fall will tell a lot. Because current (I) is same (Figure3: kirchoff's law) in this case to find bad parallel. It is easy. R*I=U But Krichoff's law pushes me to open...
  12. jerrypa

    bms saves battery, now what?

    This help me too. Thank you. :) Could I measure the batteries resistant with a standard multimeter? Can you say what are typical good values? Is there easy way to know is the BMS broken? My cell are rectangular. I think it's not matter if I use other shape of Li-ion battery. Only important...
  13. jerrypa

    Enhancing battery output

    Where i can buy new cells? Cell Specification 3.7V 2AH Cell Combination 5-parallel 10-series Cell Size 18650 Cell Quantity (parallel*series) 50 Its seems like to be warming problem? Because if error comes after lot use it will not work right away but after less use it will. Edit: All battery...
  14. jerrypa

    Enhancing battery output

    I have same kind off 36V battery JL-JD21-10A-36/10-A001 that was bought on 2011. Do the battery do these when it is overloaded. - Battery random dies and get back to live when turn the key off and back on? Usualy almost on a hill when max power has taken out. - Sometimes battery works well...
  15. jerrypa

    Infineon 6FET EB777 25A Review

    A little past the topic: Do you think that can i replace mine EB777 with this controller http://www.bmsbattery.com/controller/415-hall-sensorsensorless-250watts-brushless-hub-motor-controller.html ( There you find KU65 Controller Diagram.pdf) And why i am doing this. I whant more power...
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