Hello, I am using EVAL-ADICUP3029, EVAL-AD5941BATZ and SensorPal 2.5.3.2 to perform EIS test on li-ion batteries. I have performed the tests on 3 different cells, 2 of them are in similar conditions (internal resistance, SOC) and one of them is different from them. I can see the difference between cells as I expected there is no problem but my impedance values are too small. For example, my cell has an 40mOhm internal resistance but when i performed the test my sensorpal Real Z data is always below 1mOhm. I have checked the voltages on AIN2 and AIN3 and I think the voltages okay. Also the nyquist plots I get from various tests are stable and looks okay too. Could be a problem at SensorPal? I have tried various combinations on DC bias and AC amplitude results but results are still below 1mOhm.
