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.

公开(公告)号：US20240337034A1

公开(公告)日：2024-10-10

申请号：US18745798

申请日：2024-06-17

Applicant: Analog Devices, Inc.

Inventor： Zhiwu Zheng ,  Sheila Patricia Seidel ,  Sue Zheng ,  Atulya Yellepeddi

IPC: C25B15/023 ,  C25B9/70 ,  C25B15/06

CPC classification number: C25B15/023 ,  C25B9/70 ,  C25B15/06

Abstract: Systems and methods are provided for operating an electrolyzer. The systems and methods perform operations comprising extracting, by monitoring circuitry coupled to a plurality of electrolytic cells of an electrolyzer, a set of features comprising at least one of a goodness-of-fit measurement or direct current (DC) measurement of the plurality of electrolytic cells; tracking changes to the set of features over a time period; and generating, based on the changes to the set of features, a model representing operating conditions of the electrolytic cells on an individual electrolytic cell basis.

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：US20250154675A1

公开(公告)日：2025-05-15

申请号：US18506776

申请日：2023-11-10

Applicant: Analog Devices Inc.

Inventor： Sheila Patricia Seidel ,  Brian Harrington ,  Sue Zheng ,  Radhika Marathe

IPC: C25B15/02

Abstract: Systems and methods are provided for operating an electrolyzer. The systems and methods include operations comprising: determining that a first electrolytic cell in a first electrolyzer stack is associated with a first set of performance criteria that fails to satisfy one or more operating conditions; identifying a second electrolytic cell that is associated with a second set of performance criteria that satisfies the one or more operating conditions; and bypassing the first electrolytic cell and the second electrolytic cell in response to determining that the first electrolytic cell in the first electrolyzer stack is associated with the first set of performance criteria that fails to satisfy the one or more operating conditions and based on identifying the second electrolytic cell that is associated with the second set of performance criteria that satisfies the one or more operating conditions.

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.