US 2026/0309659 A1 · APPARATUS AND METHOD FOR MEASURING ELECTROCHEMICAL IMPEDANCE SPECTROSCOPY

Abstract

Proposed are an apparatus and a method for measuring electrochemical impedance spectroscopy (EIS) of a battery. The apparatus includes an EIS measurement unit 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 through AC discharge of the battery module, and an AC discharge switching unit connected to both ends of the battery module and configured to form an AC discharge path such that the battery module performs AC discharge through a pulse width modulation (PWM) control of a switching element when the EIS measurement unit performs electrochemical impedance spectroscopy (EIS) measurement or configured to be used as an additional function through a turn-on control of the switching element when the EIS measurement unit does not perform electrochemical impedance spectroscopy (EIS) measurement.

Claims15

Dependent claims

An apparatus for measuring electrochemical impedance spectroscopy, the apparatus comprising:

an EIS measurement unit 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 through AC discharge of the battery module;
and
an AC discharge switching unit connected to both ends of the battery module and configured to form an AC discharge path such that the battery module performs AC discharge through a pulse width modulation (PWM) control of a switching element when the EIS measurement unit performs electrochemical impedance spectroscopy (EIS) measurement and configured to be used as an additional function through a turn-on control of the switching element when the EIS measurement unit does not perform electrochemical impedance spectroscopy (EIS) measurement.

A method for measuring electrochemical impedance spectroscopy, the method comprising:

generating an alternating current corresponding to a frequency for electrochemical impedance spectroscopy (EIS) measurement of a battery module by an AC discharge switching unit connected to the battery module including a plurality of battery cells;
and
performing electrochemical impedance spectroscopy (EIS) measurement on each of the plurality of battery cells included in the battery module by an EIS measurement unit connected to respective nodes of the plurality of battery cells included in the battery module,
wherein the AC generation step comprises:
controlling, by a switching control unit of the AC discharge switching unit, a switching element of a multifunction switching unit in a pulse width modulation (PWM) manner;
and
forming an AC discharge path passing through a multipurpose function unit by repetitive on/off operation of the switching element under a pulse width modulation (PWM) control, such that the battery module performs AC discharge.

4 more elements

Dependencies are inferred from the claim text.

Apparatus and method for measuring electrochemical impedance spectroscopy

Life of this patent

Apparatus and method for measuring electrochemical impedance spectroscopy

Life of this patent

Abstract

Claims15