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The widespread use of batteries requires knowledge of their state of health (SoH). In this paper we present a method to use entropy evolution as an aging indicator for batteries. Voltage, current and temperature are monitored in battery cells used in cellphones and in real-time operation. Irreversible entropy is estimated from irreversible energy dissipation in the battery for long periods of use...
Maturation state of meat influences its fibers structure and conductivity and leads to observable changes of its complex impedance. The relationship between the postmortem state and the change of meat impedance has been characterized to serve as a basis for developing an in vitro measurement method for the freshness of meat. Experimental measurements were carried out for long period of time of 14...
Impedance spectroscopy is one of the most promising methods for characterizing aging effects of portable secondary batteries online because it provides information about different aging mechanisms. However, application of impedance spectroscopy “in the field” has some higher requirements than for laboratory experiments. It requires a fast impedance measurement process, an accurate model applicable...
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