Abstract: A device may perform impedance spectroscopy on a component under test. The frequency response analyzer circuitry may be coupled to the component under test outside of a current loop supplying an operational current to the component under test. The frequency response analyzer circuitry may drive a variable impedance circuit to generate an oscillating current component within the current loop. The frequency response analyzer circuitry may monitor a frequency response of the component under test to the oscillating current component.

Abstract: A system and method of operation which includes a variable transformer coupled to an invariable rectifier, an invariable inverter, and/or other invariable change component. The variable transformer may be used to control power conversion levels. In some cases, the system may have bandwidth to support controlled power supply for one or more electrolyzer stacks.

Abstract: The following disclosure relates to a compression apparatus for an electrochemical stack having a first plate, a second plate, and a plurality of electrochemical cells positioned between the first plate and the second plate. The compression apparatus includes a spring compression bar, a plurality of first fasteners, a plurality of second fasteners, and a plurality of springs positioned around a circumference of each second fastener.

Abstract: A system and method for detecting and conditioning cross-leaks in the operation of electrolysis systems includes a separator configured to separate the fluid into a first stream and a second stream; a heat exchanger configured to lower a temperature of the first stream to form a condensed liquid within the first stream via condensation; a trap system configured to drain the condensed liquid out of a lower outlet of the trap system and transfer a gas composition within the first stream out of an upper outlet of the trap system; a flow control and metering system configured to reduce a pressure of the first stream such that additional liquid is formed and removed from the first stream due to a pressure drop, therein providing a conditioned gas in the first stream; and a gas sensor configured to measure the conditioned gas in the first stream.

Abstract: The following disclosure relates to electrochemical or electrolysis cells and components thereof. More specifically, the following disclosure relates methods and systems for removing metal ions from a membrane of an electrochemical cell by introduction of a cleaning composition (e.g., an acidic composition) into a water supply to the electrochemical cell. These systems and methods for removal of metal ions from the membrane(s) of the electrochemical cell(s) may advantageously extend the efficiency and service life of the electrochemical cell or stack.

Abstract: A system includes a power supply for an electrochemical stack. The system may support operation in at least two modes: a first where power for the electrochemical stack originates from a renewable energy (e.g., an on-site) power source, and a second mode where power for the electrochemical stack is supplied at least in part from a power grid interconnection. A source power converter may adjust its operating voltage to select between prioritizing power from the on-site source and/or drawing power from the electrochemical stack at least in part from the power grid.

Abstract: The following disclosure relates to a compression tool for compressing a substack of electrochemical cells having a first plate, a second plate, and a plurality of electrochemical cells positioned between the first plate and the second plate. The compression tool is configured to be maintain on the substack after the substack is added to the electrochemical stack assembly and the electrochemical stack assembly commences operation of an electrolysis reaction.

Abstract: A DC power output system may achieve variable output power by paring a variable inverter with a rectifier. DC power output system may implement DC power adjustment at the output of the rectifier least in part by varying the power supplied from the variable inverter to the rectifier.

Abstract: The following disclosure relates to junctions for combining a flow at an outlet manifold. More specifically, the following disclosure relates to junctions configured to reduce outlet manifold pressure enabling the use of smaller outlet manifolds for electrochemical cells and cell stacks.

Abstract: The following disclosure relates to methods of identifying defects (e.g., short circuits) in a membrane of an electrolytic cell. The following disclosure further relates to methods of repairing such a defect in the membrane of the electrolytic cell, particularly without having to disassemble the membrane from adjacent components of the electrolytic cell.

Abstract: A system may detect defects in a membrane cell or portion thereof by detecting gas transfer across the defect. Gas may be released in a release region of a chamber. The release region may be separated from a detection region of the chamber by the membrane cell or portion thereof. When gas traverses the product from the release region to the detection region, the system may determine that the membrane cell or portion thereof has a defect.

Abstract: An electrolyzer system includes a multiple-state power input and control circuitry for the multiple-state power input. The control circuitry is configured to obtain a power source metric indicator and, based on the power source metric indicator, determine a hydrogen generation profile for the electrolyzer. The control circuitry is configured to determine, based on the hydrogen generation profile, a selected state from among multiple power states of the electrolyzer system. The control circuitry is configured to cause operation of the electrolyzer system in the selected state.