公开(公告)号：US20240302472A1

公开(公告)日：2024-09-12

申请号：US18595283

申请日：2024-03-04

Applicant: Analog Devices, Inc.

Inventor： Brian Harrington ,  Sheila Patricia Seidel ,  Leah Alexis Garber ,  Sue Zheng ,  Kate Danielle Fischl ,  Atulya Yellepeddi ,  Evan Merkel

IPC: G01R35/00 ,  G01R31/3842 ,  G01R31/389 ,  G01R31/396

CPC classification number: G01R35/005 ,  G01R31/3842 ,  G01R31/389 ,  G01R31/396

Abstract: A calibration system for calibrating an electrochemical impedance spectroscopy (EIS) current measurement system can include a calibration resistor, which can have a specified resistance and an unspecified reactance, a reactive element which can have a specified reactance and an unspecified resistance, and a current source, which can be configured to provide a specified current through the reactive element, through the calibration resistor, and through a sense resistor arrangement of the EIS current measurement system to be calibrated, where the sense resistor arrangement can have a resistance and a reactance. The calibration system can also include voltage measurement circuitry, which can be configured to measure (1) a first voltage across the calibration resistor and a second voltage across the sense resistor arrangement and (2) a third voltage across the reactive element and a fourth voltage across the sense resistor arrangement, to determine a calibrated resistance value and a calibrated reactance value associated with the sense resistor arrangement.

公开(公告)号：US20240302445A1

公开(公告)日：2024-09-12

申请号：US18595294

申请日：2024-03-04

Applicant: Analog Devices, Inc.

Inventor： Brian Harrington ,  Sheila Patricia Seidel ,  Leah Alexis Garber ,  Sue Zheng ,  Kate Danielle Fischl ,  Atulya Yellepeddi

IPC: G01R31/389 ,  G01R31/367 ,  G01R31/3842 ,  G01R31/396

CPC classification number: G01R31/389 ,  G01R31/367 ,  G01R31/3842 ,  G01R31/396

Abstract: A method for selecting one or more gain values in an electrochemical impedance spectroscopy (EIS) current measurement system to provide an improved signal-to-noise characteristic can include selecting a larger one of an electrochemical cell arrangement impedance indication value and a sense resistor arrangement impedance indication value and using the selected impedance indication value as a determined impedance indication value. The method can also include determining, for a plurality of gain setting combinations, an EIS excitation current value at which current measurement circuitry of the current measurement system will reach a specified amount of a non-saturation range of the current measurement system when measuring the determined impedance indication value. The method can also include determining, for the plurality of gain setting combinations, a signal-to-noise characteristic at the determined EIS excitation current based upon a determined noise level in at least one part of the EIS current measurement system.

公开(公告)号：US20240302444A1

公开(公告)日：2024-09-12

申请号：US18595276

申请日：2024-03-04

Applicant: Analog Devices, Inc.

Inventor： Brian Harrington ,  Sheila Patricia Seidel ,  Leah Alexis Garber ,  Sue Zheng ,  Kate Danielle Fischl ,  Atulya Yellepeddi ,  Evan Merkel

IPC: G01R31/389 ,  G01R31/385

CPC classification number: G01R31/389 ,  G01R31/386

Abstract: An electrochemical impedance spectroscopy (EIS) current measurement system for measuring a current through a cell arrangement including one or more electrochemical cells can include a sense resistor arrangement, which can be configured to be placed in series with the cell arrangement, and voltage measurement circuitry, which can be configured to measure a voltage across the sense resistor arrangement, including to measure at least a direct current (DC) component of the voltage, where a current through the sense resistor arrangement can have a DC component and an alternating current (AC) component.