Re-used Lead-Acid Car Battery SoH Monitoring through Spectroscopy and PC Power Supply Units

Frugal innovation could be part of the solution for rural electrification problems. This paper presents some guidelines to implement a spectroscopy in an Arduino in order to evaluate the state of health (SoH) of used lead-acid car batteries. The program works as a frequency response analyzer to inspect battery inner impedance. Users can control the assessment of the battery status via the App on a smartphone and receive the results returned from the Arduino. This method of evaluation is faster than the traditional method and is more convenient for the user because it replaces expensive laboratory equipment by re-used second life elements. Simulation and experimental results show the feasibility and effectiveness of the proposed method.