A Portable Impedance Analyzer for Lithium-ion Batteries

This paper develops a portable lithium-ion battery impedance analyzer. In terms of hardware, the industry's latest battery management analog front-end chip DNBl168 is used to measure the electrochemical impedance spectra (EIS) of lithium-ion batteries, and the microcontroller module, power management module, and human-computer interaction module are designed to miniaturize the solution and improve the stability by adopting PCB and 3D printing structure. On the software side, peripheral drivers, impedance measurement and multi-level menu framework codes were written, and EIS measurement, user interface interaction and history recording functions were developed. Efficient and accurate measurement of lithium-ion battery impedance was realized. Finally, the reliability and effectiveness of this lithium-ion battery impedance analyzer are verified after testing and analysis.