Advanced Approach to Battery Impedance Measurement Using DC Current Step

The influence of battery test conditions to measure the DC impedance is an important issue in standard protocols. With a current step is possible to measure DC resistance. Standard protocols measure the voltage after several seconds, this technique includes in the result three components of the internal impedance. An easy method to measure each component of the internal impedance of a battery would be very useful. With Electrochemical Impedance Spectroscopy (EIS) is possible to measure each component of the impedance but this technique requires more time and a complex hardware. This work proposes an easier method based on DC current step.