METHOD AND APPARATUS FOR EXTRACTING ENTROPY OF ELECTROCHEMICAL ELEMENT USING HEAT GENERATION RESPONSE ACCORDING TO ELECTRIC SIGNAL INPUT

摘要

Provided is a method of extracting the entropy of an electrochemical device, the method comprising the steps of: applying a current including a frequency component to the electrochemical element; measuring a change in heat or temperature of the electrochemical element generated by the applied current; separating the frequency component of the measured change in heat or temperature, and specifying a frequency component that is one or two times the applied current; separating heat generation components including resistance heat generation and entropy heat generation from the specified frequency component and the change in temperature; and extracting the entropy of the electrochemical element through a combination of the ratio of the heat generation components and the absolute magnitude of the resistance heat generation.