HYDROGENICS CORPORATION

The present disclosure generally relates to systems and methods for purging water or gas from a fuel cell system. The fuel cell system may include a multi-phase valve system and/or a separate valve system. The opening and closing of the valve systems for removing gas and water is controlled by a controller.

The present disclosure relates to a glueless repeatable finger attachment apparatus and method of monitoring a fuel cell voltage comprising the same.

A bipolar plate includes a sheet having channels formed on a surface of the sheet, each channel including a header region, an active region, and an exhaust region. The channels are formed adjacent to each other and successively from a top side to a bottom side of the sheet. The active region is furcated into at least two active area channels along a longitudinal length of the active region from where the active region fluidically connects to the header region to where the active region fluidically connects to the exhaust region. A number of active area channels in the active regions of successive channels varies in one of a direction from the top side to the bottom side or a direction from the bottom side to the top side so as to achieve a uniform pressure drop and mass flow distribution across the plurality of channels.

A fuel cell assembly includes a first bipolar plate, a second bipolar plate, and a diffusion-electrode assembly. A first top surface of the first plate includes a first seal protruding upwardly and a first raised feed channel adjacent the first seal and protruding upwardly. A second bottom surface of the second plate includes a second seal protruding downwardly and a second raised feed channel adjacent the second seal and protruding downwardly. The diffusion-electrode assembly includes a membrane layer having a membrane frame extending therefrom and two gas diffusion layers. The first and second plates are arranged parallel, the first and second seals align with each other, and the first and second raised feed channels align with each other. The first and second raised feed channels contact the membrane frame arranged therebetween so as to prevent mechanical deformations of the first and second plates.

A modular power system includes a fuel cell module and a battery module. The fuel cell module has a plurality of fuel cell stacks. Each fuel cell stack includes a plurality of fuel cells. The plurality of fuel cells is arranged in a vertical orientation in one or more planes located above and perpendicular to a chassis of the vehicle. The battery module has a plurality of batteries arranged in one or more battery stacks. The battery module is electrically connected to the fuel cell module. The plurality of batteries is located in one or more planes directly above and parallel to the chassis.

The present disclosure generally relates to systems and methods for determining, managing, and/or controlling excess hydrogen flow in a system comprising a fuel cell or fuel cell stack and ejector based on the internal state of the ejector.

The present disclosure relates to systems and methods for heating a fuel cell module.

The present disclosure is directed to systems and methods for detecting a hydrogen leak in a fuel cell system including initiating a shutdown process of a fuel cell stack in the fuel cell system by a controller, measuring a volume of hydrogen in a reservoir, pulsing a volume of hydrogen into the reservoir or pulsing hydrogen directly into the fuel cell stack if the volume of hydrogen is insufficient to sustain a voltage discharge process during the shutdown process, making the fuel cell system enter a discharge state by the controller, wherein hydrogen and oxygen in the fuel cell stack are consumed in an electrochemical reaction to discharge voltage in the fuel cell stack, measuring a rate of the voltage discharge by the controller, and detecting the hydrogen leak based on the rate of the voltage discharge or via negative pressure measurements made at the anode inlet.

The present disclosure relates to a thermal management system and method of adjusting and/or reversing coolant flow of a fuel cell system during stationary applications.

A method of optimizing operating lifespan of an electrolysis system includes measuring an operating parameter of a component of the system at a first location of the electrolysis system with a first sensor to obtain a raw measurement, the raw measurement including a value and/or a rate of change of the parameter, receiving the raw measurement at a controller, comparing the value to a nominal measurement and/or the rate of change to a nominal rate of change. The method further includes diagnosing an abnormality of the component based on the value and/or rate of change differing from nominal values. The method further includes, in response to the diagnosis of the abnormality, outputting a message to an operator of the electrolysis system indicative of the abnormality.