ELECTROCHEMICAL IMPEDANCE SPECTROSCOPY MEASUREMENT APPARATUS AND METHOD, AND BATTERY SYSTEM

Abstract

Proposed are an electrochemical impedance spectroscopy measurement apparatus and method, and a battery system. The electrochemical impedance spectroscopy measurement apparatus includes an EIS measurement part connected to each of a plurality of battery cells included in a battery module, and configured to perform electrochemical impedance spectroscopy (EIS) measurement on each of the plurality of battery cells during AC discharge of the battery module, and an AC discharge switching part connected to the battery module to form an AC discharge path, and configured to supply a driving voltage to a power consumption distribution switching element included in the AC discharge path through a plurality of driving voltage supply paths connected to nodes of the plurality of battery cells electrically connected. Electrochemical impedance spectroscopy (EIS) measurement for the battery may be performed, and impedance measurement may be continuously performed even when a particular node voltage line connected to the battery is disconnected.

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