Some initial ideas for the design of a battery (or cell) internal resistance tester for NiMH AAs or Lithium 18650s.
Energizer Technical Bulletin "Battery Internal Resistance": http://data.energizer.com/PDFs/BatteryIR.pdf
Energizer Technical Bulletin "Battery Internal Resistance": http://data.energizer.com/PDFs/BatteryIR.pdf
Still waiting for part 2 🙂
Great job Thank you I understand know cristal clear. Why!!!! Looking forward for more videos
Did you ever follow up on this?
I am thinking that I might be able to program the CR mode of my "East Tester ET5410" electronic load for measuring internal resistance.
It was very good for my ears but my eyes will shake the rest of the day.
I learned a hard lesson on the 1st flight of my new plane…….CRASH near the ground, as I lost all control at the 5 min mark of flight and I was very close ( range wise ) …..I was using a very old 3S 2200mah LiPo….pretty sure the ESC went into LVC, although after checking the battery after the crash it showed voltage was 3.80 per cell ……..I am now searching for a simple way to check IR in all my LiPos …….
LSD???
I had the exact same curiosity when capacity testing my collection of 18650 cells.
Did you get this working?
Part 2 please.
I have over 1100 ,,,18650's I am building a pack from. I was thinking about trying to match the IR as much as I can. To help keep the bank balanced. I am capacity testing every one of them!!! Big job!! BIG!!! I am capable of charging 18 at once independently. And testing 15 independently. It still takes a long time. In fact I get up in the middle of the night to do a cell change. It takes about a month to test 200 cells. I'm using 98% of the cells. The 2% are 0 volt. Or under 2200mah. The useable cells are usually 2300-2925 mah. So it should be 29.4v and well over 500 ah when done.. Great old video. I'd like to see more!!
Hi I would like to know what oled display that was?
Most are too small.
And the finished circuit is….??
Julian did you ever finish this project?? Many people are asking!