Abstract
Electrochemical noise measurements were carried out on commercially available Li/SOCl2 and Li/MnO2 primary batteries during relaxation following removal of load. Another type of experiment was performed with different values of DC current. Power spectral density dependencies on the load current were obtained in this way for both battery types. On the basis of the measurement results, a physical interpretation of noise-generating processes was proposed for the investigated battery types. Two distinct SOC evaluation techniques were tested for each battery type—one based on spectral characteristics of electrochemical noise for the Li/SOCl2 system and the other based on the relaxation time length of the electrochemical noise for the Li/MnO2 system.
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