No need to cross check your brilliance buuuut....... No just kidding
.
I have done the measurements and here is what they are.
INA260 measured all 4 and they were so close it is not worth mentioning. Result 4.958mΩ
Ground Bus to cell holder (Measured all 4 and again the tolerances were negligible) Result .946mΩ
Then I measured the Positive Bus which goes through the INA260 to the cell holder. 10.13mΩ. Again negligible differences between all 4 measurements.
As a side note I did measure the resistance of the new style cell holders and was surprised at how much resistance they had if you use the PCB contact. Result 6.977mΩ
So total Analyzer resistance for each cell is 11.076mΩ and between any 2 cells is 22.152mΩ.
OK so to the baseline of the NCR18650GA Cells. The tester is looking good and performing as expected. Here is the trace from the first heartbeat to a regular rhythm of a 3 cycle C/D/C..
Also the cell temp readings are looking good.
I have just inserted 4 cells. These are new cells, 2 ICR189650-26J and 2 INR18650-25R.
Cell 1 #16 39.43mΩ 4.150V ICR189650-26J
Cell 2 #17 39.74mΩ 4.146V ICR189650-26J
Cell 3 #21 13.70mΩ 4.132V INR18650-25R
Cell4 #22 14.04mΩ 4.130V INR18650-25R
They are equalizing right now and in a bit I will run a 3 cycle C/D/C trace on them. As you can see they are both about the same capacity but IR is quite different. I also have added a 10min rest period between cycles. This test is charge to 4.2V, discharge to 3.0V @ 1A.
Remember you can at anytime view this graph and if you want you can download the data as a csv.
http://wolftech.mynetgear.com:4562/d/myaGzm5Wz/cell-analysis-new?orgId=1&refresh=5s&from=now-24h&to=now
Update: 7/14/2023 login to chart no longer available experiment has passed,
username is guest and password is guestw
You can select the time of the data you want in the upper right corner. Or you can swipe the graph with your mouse
Just click the header click on inspect, chose data and then transformer and select join by time. Then you can download the CSV.
Ready set go!
Wolf