Abstract: Electrochemical cell stacks that utilize a bundle assembly architecture to improve manufacturing, maintenance, and rework capabilities. Bundle assemblies include a top bundle plate, a bottom bundle plate, and a plurality of electrochemical cell layers disposed between the top bundle plate and the bottom bundle plate, and wherein the plurality of electrochemical cell layers is electrically and fluidly connected to the top bundle plate and the bottom bundle plate.

Abstract: Systems and methods for regenerating dryers in processes for producing hydrogen are described. The systems and methods include regenerating the dryers either with hydrogen produced during the process or with an inert gas, such as nitrogen. The systems and methods increase utilization of hydrogen produced in the process and overall efficiency.

Abstract: An aircraft electrical power supply system includes a fuel cell auxiliary power unit (APU) that supplies auxiliary electrical power to an aircraft, a fuel cell power plant that supplies primary electrical power to the aircraft, and a hydrogen storage unit that supplies hydrogen to the fuel cell APU and the fuel cell power plant.

Abstract: A method includes providing raw water into a first filter assembly to remove solids from the raw water to form a filtrate, providing the filtrate from the first filter assembly into a second filter assembly to electrochemically remove ionics from the filtrate to form purified water, and providing the purified water to an electrolyzer to generate hydrogen by electrolyzing the purified water.

Abstract: The present disclosure provides composite ion exchange membranes and methods of making the same. The composite ion exchange membranes of the present disclosure include a first layer comprising a first ion-conducting membrane; a second layer comprising a gas-blocking membrane; and a third layer comprising a second ion-conducting membrane.

Abstract: A system for controlling a photovoltaic (PV)-powered hydrogen production plant includes a plurality of PV modules to receive sunlight and output DC power, wherein the plurality of PV modules are combined in series to create a PV string, at least one power cabinet comprising at least one DC-to-DC power converter to receive DC power from the PV string and provide regulated DC power to an electrolyzer stack, the regulated DC power having regulated output current and/or voltage, and at least one controller to control the at least one DC-to-DC power converter to match the regulated DC power to requirements of the electrolyzer stack.

Abstract: An alternating current (AC) impedance spectroscopy method includes providing an AC impedance spectroscopy ripple from power electronics into an electrochemical device, and absorbing the ripple in the power electronics.

Abstract: Described herein are systems and methods for the efficient desalination and electrolysis of water to form hydrogen and oxygen gas. The systems include a desalinator, an electrolyzer, and a coolant loop. The coolant loop transfers heat produced by the electrolyzer to the desalinator, thereby reducing the energy inputs required for the desalinator to function. The methods generally include desalinating water in a desalinator, electrolyzing the desalinated water, and transferring heat generated by the electrolyzing to the desalinator.

Abstract: A system for reducing ore includes a hydrogen supply unit configured to supply hydrogen, a furnace configured to reduce the ore using the supplied hydrogen, and a hydrogen recovery unit configured to recover hydrogen from an exhaust gas that is exhausted from the furnace.

Abstract: The present disclosure generally relates to systems and techniques for power generation. For example, aspects of the present disclosure include systems and techniques for managing renewable energy power based on weather sensing. One example method generally includes: receiving information related to cloud coverage impacting intensity of light towards one or more panels of a photovoltaic (PV) generator, the PV generator being configured to provide power to a load; selecting one of a plurality of power storage equipment based on the information related to the cloud coverage, the plurality of power storage equipment being associated with different types of power storage; and controlling distribution of power from the one of the plurality of power storage equipment to the load.

Abstract: A modular system for hydrogen generation includes a plurality of cores electrically connected in series to a power supply, wherein each core includes an electrolyzer and a bypass circuit configured to electrically isolate the core from the power supply. The modular system also includes a hub including a water source and a controller, wherein the water source is in fluid communication with the electrolyzer of each of the plurality of cores, and the controller includes a switch activatable, in response to a triggering condition, to electrically isolate one or more of the plurality of cores from the power supply via a respective bypass circuit.

Abstract: The present disclosure relates to circuits for connecting components of a hydrogen plant to a power grid to power the components in an efficient manner. In one implementation, power-side alternate current (AC) to direct current (DC) converters may be connected to a source power grid without the need for an isolation transformer by providing separate buses between the power-side AC-DC converters and load-side DC-DC converters instead of a shared DC bus between the converters. Other implementations for connecting components of a hydrogen plant to a power grid may include an adjustable transformer, such as a tappable transformer or an autotransformer, to connect any number of auxiliary loads of the plant to the power grid. The adjustable transformer may provide for various types of auxiliary load devices to connect to the power provided by the transformer at the same time, including both three-phase devices and one-phase devices.

Abstract: The present disclosure provides systems and methods for generating and storing hydrogen and electricity. The systems generally include an electrolyzer stack, a fuel cell stack operably connected to the electrolyzer stack, and a hydrogen recirculation stack operably connected to the electrolyzer stack and to the fuel cell stack.

Abstract: A power generation system includes a power source that is configured to communicate with at least one of a downstream load or a downstream device by changing a voltage on a power bus between the power source and the at least one of the downstream load or the downstream device, while power source provides power on the power bus to the at least one of the downstream load or the downstream device.

Abstract: A method includes providing raw water into a first filter assembly to remove solids from the raw water to form a filtrate, providing the filtrate from the first filter assembly into a second filter assembly to electrochemically remove ionics from the filtrate to form purified water, and providing the purified water to an electrolyzer to generate hydrogen by electrolyzing the purified water.

Abstract: Provided herein are systems and methods for generating hydrogen and ammonia. The hydrogen is generated in an anion exchange membrane-based electrochemical stack. The hydrogen generated in the stack may be used to generate ammonia or may be used for other applications requiring hydrogen. The feedstock for the anion exchange membrane-based electrochemical stack may be saline water, such as seawater. A desalination module or a chlor-alkali stack may be used to treat the saline water prior to electrolysis in the anion exchange membrane-based electrochemical stack.

Abstract: A fuel cell system having a power module including at least one fuel cell segment, an input output module including at least one inverter, a rectifier, and an electric distribution module having at least a first electrical connector and a second electrical connector. The at least one fuel cell segment may be electrically connected to the at least one inverter and may be electrically connected to an information technology (IT) load via a split bus. The at least one inverter may be electrically connected to an alternating current (AC) source via the first electrical connector of the electric distribution module. The rectifier may be electrically connected to the AC source via the second electrical connector of the electric distribution module and may be electrically connected to the IT load via the split bus.

Abstract: Systems and techniques are described herein for producing hydrogen. For instance, a method for producing hydrogen is provided.

Abstract: A system and method of power management for a power generation system is disclosed. A method of power management for a hydrogen generation system including one or more electrochemical stacks, the one or more electrochemical stacks receiving power from an electrical grid including at least one power source, includes: receiving a frequency or voltage reference value for the hydrogen generation system; continually monitoring a frequency or voltage of the electrical grid; and varying a load of the hydrogen generation system in response to the frequency or voltage of the electrical grid differing from the frequency or voltage reference value to restore the frequency or voltage of the electrical grid to the frequency or voltage reference value.

Abstract: The systems and methods described herein provide high-precision control of hydrogen generation and electricity use, thereby increasing the efficiency of the overall process. The system may include a power source that includes a rectifier for converting an alternating current input power signal to a direct current power signal. The direct current power signal may also be converted to a voltage level through a converter as an output to a vehicle network. A hydrogen generating system may also produce and provide hydrogen to the vehicle network. In some implementations, the vehicle network may include one or more electrical vehicles, hydrogen fuel-based vehicles, or hybrid hydrogen/electrical vehicles.