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Recent content by Silvaticus

  1. Silvaticus

    kWeld - "Next level" DIY battery spot welder

    Not sure if this was addressed to me. However, long thin wires act as a current limiting resistor. Thereby increasing the overall resistance of the system. In addition, the overall efficiency is reduced. From personal experience, the most significant adjustment to the resistance of the entire...
  2. Silvaticus

    kWeld - "Next level" DIY battery spot welder

    The total length of the conductors is over three meters or 10 feet? Why do you need such long wires? Are you planning to use them as a heater? :) After all, Frank recommends trying to bring the value closer to 1 meter. You can connect your modules in parallel, although this will further...
  3. Silvaticus

    SICB 2.4V10ah LTO battery

    Well, it's not difficult. :) In fact, I was not sure that his / their actions did not violate any of the forum rules. That why I have placed these links for your solution.
  4. Silvaticus

    DIY Arduino timed spot-welder, FET-switched, adj. pulse

    Here's what I came across on the web on this issue. «A simplified model of a capacitor is shown below. It consists of: Cp = parallel capacitance, or the bulk capacitance. In your case, the 1020uF capacitance. Rp = parallel resistance, or, the leakage resistance. Typically in the tens of meg-ohm...
  5. Silvaticus

    SICB 2.4V10ah LTO battery

    Obviously, this is a self-promotion of a Chinese factory. He has a link to the site in his profile: http://www.senberrybattery.com https://endless-sphere.com/forums/viewtopic.php?f=31&t=113746 https://senberry.en.alibaba.com...
  6. Silvaticus

    Li-Ion Cylindrical Cell Battery Pack Remaining Capacity v Resting Voltage Table

    Hi. Could you tell me for what chemistry was your table made? The fact is that these numbers vary slightly depending on the type of elements and chemistry. I have never delved deeply into these differences. Once upon a time we made a summary table about capacities depending on voltage. All data...
  7. Silvaticus

    DIY Arduino timed spot-welder, FET-switched, adj. pulse

    As far as I know, in a closed circuit, the current is the same in any of its sections. Therefore, the maximum achievable current depends on the total impedance of this section. We omit the voltage dependence, since we are considering the conditions for the same system. Am I interpreting your...
  8. Silvaticus

    DIY Arduino timed spot-welder, FET-switched, adj. pulse

    Thanks for the more detailed answer. Now everything is clearing up. Judging by the manufacturer's datasheets, if you manage to achieve a total resistance of no more than 2.33mΩ in your 3S3P assembly, then the maximum current (as it seems to me, it is the short-circuit current) that you can get...
  9. Silvaticus

    Sourcing 21700 cells from Korea, Japan or China, 10,000 cells

    I just thought you had lost interest. I replied to you in PM. Good luck.
  10. Silvaticus

    DIY Arduino timed spot-welder, FET-switched, adj. pulse

    The question was quite simple. How is it possible to connect 3 super capacitors in series to get a current almost 5 times higher than the current from the manufacturer's datasheet. I do not have an oscilloscope and I am not able to take such measurements. In this regard, I asked how accurate...
  11. Silvaticus

    DIY Arduino timed spot-welder, FET-switched, adj. pulse

    How did you manage to trick the laws of physics and Ohm's law? What is your total system resistance with open mosfets? You have three super capacitors in series. This means that the total current source resistance (Ri) near 0.8mΩ. The physical limit of your current source is at 800A according...
  12. Silvaticus

    Sourcing 21700 cells from Korea, Japan or China, 10,000 cells

    I wrote to the merchant that you weren't interested.
  13. Silvaticus

    kWeld - "Next level" DIY battery spot welder

    Now it is clear why I did not know anything about it.
  14. Silvaticus

    kWeld - "Next level" DIY battery spot welder

    I am not following the project. And where is it written about 3kA? When I went to the project page before writing the post, I did not see anything about it. Maybe I wasn't paying attention enough.
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