Interpretation problems of impedance measurements on time variant systems Battery & Corrosion – Application Note 55
Latest updated: January 31, 2024Abstract
Electrochemical systems like a battery in operation or a corroding electrode are rarely time-invariant. Impedance graphs obtained on time-variant systems can often mislead to a wrong interpretation and analysis when using the equivalent electrical circuit. This application note describes two examples of such a mislead interpretation using a commonly used electrical equivalent circuit with a variable resistor.
Introduction
The application note #9 [1] deals with impedance measurements performed on linear (and non-linear) time-invariant systems. Electrochemical systems like a battery in operation or a corroding electrode are rarely time-invariant. Impedance graphs obtained on time-variant systems can often mislead to a wrong interpretation and analysis when using the equivalent electrical circuit. This application note describes two examples of such a mislead interpretation using a commonly used electrical equivalent circuit with a variable resistor
To view the entire application note please click the download button below.