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Behaviour of cells in parallel take 2
#1
Another experiment has taken place at the Wolf's PowIRwall location.
Previous posts on this subject are at https://secondlifestorage.com/showthread.php?tid=7846
I dragged out my 4p testing rig and decided to test 4 ICR18650-28A cells that had a reasonable IR at ≈ 50mΩ but their mAh testing was in the low 2000mAh with the SKYRC tester.

cell1 4.176V 52.74mΩ 2089mAh
cell2 4.178V 51.20mΩ 2141mAh
cell3 4.178V 53.73mΩ 2072mAh
cell4 4.180V 53.30mΩ 2043mAh

As predicted the discharge of all cells was relatively even as the IR and mAh were closely matched so no cell was stressed more than the other. Temperature did rise about 4°C toward the end. Temperature on cell 1 and cell 4 was less as they did not have a cell on both sides such as cell 2 and cell 3.
 
Since these cells have a spec sheet of max 4.30V full charge and cutoff at 2.75V. I will run this test again with those parameters and see what happens under those circumstances.
Pictures of my testing lab.
  

Wolf
If 18 X 650 = 2200+mAh then we have power! 
May all your Cells have an IR of 75mΩ or less Smile
Last count as of 01/23/2020
Total Number of Cells Recorded and processed                 6263
Total Cells required for PowIRwall  14S80P+1                  1200
Total Cells ≥2200mAh, ≥80%, ≥35mΩ, ≤75mΩ, ≥4.12V   3286
For Info Google Drive
Not your average Wolf       
            Cool
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