Billerica, MA, United States
Billerica, MA, United States

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Patent
Nuvera Fuel Cells Inc. | Date: 2015-03-19

The cathode recirculation system for a fuel cell module may include an inert gas inlet passage configured to receive inert gas and an oxygen gas inlet passage configured to receive oxygen, a blending component in fluid communication with the inert gas inlet passage, the oxygen gas inlet passage, and an inlet of at least one cathode, and a recirculation line in fluid communication with an outlet of the at least one cathode and the blending component configured to recirculate a mixed gas stream containing oxygen and an inert gas. At least a portion of the mixed gas released from the at least one cathode may be recirculated back to the blending component where oxygen, inert gas, or both oxygen and inert gas are introduced into the recirculated mixed gas stream and then supplied to the inlet of the at least one cathode.


In accordance with one embodiment, a method of drying a hydrogen gas mixture is disclosed. The method may include determining a mass flow rate of water {dot over (m)}_(H2O )in a hydrogen gas mixture stream and an adsorbent capacity of one or more adsorbent beds; determining a first period of time based on the determined mass flow rate of water {dot over (m)}_(H2O )in the hydrogen gas mixture stream and the adsorbent capacity; directing the hydrogen gas mixture stream through a first adsorbent bed of the one or more adsorbent beds for the first period of time; adsorbing a quantity of water from the hydrogen gas mixture stream into the first adsorbent bed; and regenerating the first adsorbent bed.


Patent
Nuvera Fuel Cells Inc. | Date: 2015-05-13

A flow field for use in an electrochemical cell is disclosed. The flow field includes a porous metallic structure including an inlet port and an outlet port. The flow field further includes a plurality of first channels formed in the structure. Each of the plurality of first channels extends from a first proximal end in fluid communication with the inlet port and terminates at a first distal end within the structure. The flow field also includes a plurality of second channels formed in the structure. Each of the plurality of second channels extends from a second distal end in fluid communication with an outlet port and terminates at a second proximal end within the structure.


Patent
Nuvera Fuel Cells Inc. | Date: 2016-07-06

The present disclosure is directed towards the design of bipolar plates for use in conduction-cooled electrochemical cells. Heat generated during the operation of the cell is removed from the active area of the cell to the periphery of the cell via the one or more bipolar plates in the cell. The one or more bipolar plates are configured to function as heat sinks to collect heat from the active area of the cell and to conduct the heat to the periphery of the plate where the heat is removed by traditional heat transfer means. The boundary of the one or more bipolar plates can be provided with heat dissipation structures to facilitate removal of heat from the plates. To function as effective heat sinks, the thickness of the one or more bipolar plates can be determined based on the rate of heat generation in the cell during operation, the thermal conductivity (k) of the material selected to form the plate, and the desired temperature gradient in a direction orthogonal to the plate (T).


Patent
Nuvera Fuel Cells Inc. | Date: 2016-07-22

A method of fabricating a catalytic reactor assembly having an outer tube and an inner tube is provided. The method may include inserting a catalyst into the outer tube and inserting the inner tube through the catalyst. The method may further include radially expanding the inner tube against the catalyst.


Patent
Nuvera Fuel Cells Inc. | Date: 2016-07-12

A pressure swing adsorption (PSA) system for purifying a feed gas is provided. The PSA system may have a first adsorber bed and a second adsorber bed, each having a feed port, a product port, and adsorbent material designed to adsorb one or more impurities from the feed gas to produce a product gas. The PSA system may also have a network of piping configured to direct the feed gas to the feed ports of the adsorber beds and direct the product gas to and from the product ports of the adsorber beds. The network of piping may also be configured to transfer gas between the first adsorber bed and the second adsorber bed during a pressure equalization step and a purge step. The PSA system may also have a first valve configured to direct flows of the feed gas and the product gas through the network of piping. The PSA system may further have a first orifice configured to regulate a flow rate of gas between the first adsorber bed and the second adsorber bed during at least one of the pressure equalization step and the purge step.


Patent
Nuvera Fuel Cells Inc. | Date: 2015-11-09

This disclosure related to polymer electrolyte member fuel cells and components thereof, including fuel cell electrodes.


Patent
Nuvera Fuel Cells Inc. | Date: 2015-06-25

A flow field for use in an electrochemical cell is disclosed. The flow field includes a porous metallic structure including an inlet port and a plurality of channels stamped in the structure. The plurality of channels is in fluid communication with the inlet port to receive a reactant gas and configured to cause the reactant gas to diffuse through the porous metallic structure between adjacent channels.


Patent
Nuvera Fuel Cells Inc. | Date: 2016-07-12

The present disclosure is directed to a fuel cell system for generating oxygen depleted air. The fuel cell system may include a fuel cell having an anode, a cathode, and an electrolyte positioned between the anode and the cathode. The cathode may be configured to receive an air flow and discharge an oxygen depleted air flow. The fuel cell system may further include a sensor configured to generate a first signal indicative of a presence of hydrogen in the oxygen depleted air flow and a controller in communication with the sensor and the fuel cell. The controller may be configured to detect the presence of hydrogen in the oxygen depleted air flow based on the first signal, and in response to detecting the presence of hydrogen in the oxygen depleted air flow, selectively cause a current density of the fuel cell to decrease and/or increase a flow rate of the air flow to the cathode.


Patent
Nuvera Fuel Cells Inc. | Date: 2015-08-26

A method of sealing a multi-component bipolar plate is disclosed. The method may include inserting a first seal between a first component and a second component, wherein the first seal is aligned with a first plurality of protrusions formed on a surface of at least one of the first component and the second component. The method may also include compressing the first component and the second component to cause the penetration of the first plurality of protrusions into the first seal. The method may further include plastically deforming the first seal in order to create a first sealing surface between the first component and the second component.

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