Electrochemical impedance spectroscopy (EIS) is a powerful diagnostic technique for lithium-ion batteries, capable of probing internal phenomena such as ohmic resistance, charge-transfer kinetics, and diffusion processes. Recent advances in dynamic EIS (DEIS) have shown promise for real-time monitoring of degradation and safety-critical events; however, most demonstrations rely on laboratory potentiostats or three-electrode research cells, which are impractical for integration into onboard battery management systems (BMS). This work investigates the feasibility of using a compact, low-power impedance monitoring integrated circuit for embedded EIS measurements under static conditions. The Analog Devices AD5941 evaluation platform was configured in a two-electrode, four-point Kelvin setup with bias control, sinusoidal excitation, and a frequency range extending into the kilohertz domain. Impedance data were collected via UART for post-processing. Nyquist and Bode responses showed strong agreement with reference laboratory instruments in the mid- and high-frequency ranges, demonstrating the suitability of chip-level hardware as a foundation for future EIS-enabled onboard diagnostics.
.jpg "Chandan Chetri, BE, MASc (he/him/his) photo")