摘要:
An undulating structure for use in a fuel cell includes a plurality of peaks and valleys. A method of making a structure for use in a fuel cell includes providing a mesh or screen sheet having one or more edges, forming the mesh or screen sheet into an undulating structure and treating one or more of the edges. A flow field for a fuel cell, comprising at least one metal mesh or screen, wherein the at least one metal mesh or screen includes a plurality of peaks and valleys. A fuel cell, comprising a first corrugated mesh or screen positioned within an anode of the fuel cell, a second corrugated mesh or screen positioned within a cathode of the fuel cell, and a membrane positioned between the first corrugated mesh or screen and the second corrugated mesh or screen.
摘要:
A membrane fuel cell delimited by bipolar plates comprising a cathodic compartment and an anodic compartment, said cathodic compartment comprising means for feeding air from the bottom to the top, said anodic compartment comprising means for feeding a hydrogen-containing fuel from the top to the bottom, at least one of said cathodic and anodic compartment comprising a flow distributor consisting of a porous material and a method of operating cell said.
摘要:
A method of managing humidification for a fuel cell power system comprising, supplying air to a cathode inlet stream of a fuel cell. Detecting a fuel cell parameter associated with the humidity of the cathode inlet stream. Selectively operating the fuel cell in either an active humidification mode or a deactive humidification mode based on the fuel cell parameter, wherein the active humidification mode includes adding water to the cathode inlet stream and the deactive humidification mode includes adding no water to the cathode inlet stream.
摘要:
The present disclosure is directed to a method and system for detecting activation of a pressure relief device connected to a storage tank containing a pressurized gas. The method includes calculating a pressure relief device release rate based on a set of inputs, wherein the set of inputs includes at least one of a storage tank volume, a pressure relief set point, an orifice size of the pressure relief device, a gas density, and a reseat point for the pressure relief device. The method further includes monitoring the pressure within the storage tank and calculating a differential pressure reading over time, comparing the differential pressure reading over time to the pressure relief device release rate, and detecting a pressure relief device activation based on the comparison result.
摘要:
One aspect of the present disclosure is directed to a fuel cell power system. The system may include one or more fuel cells configured to generate electric power and a compressor configured to supply compressed air to the one or more fuel cells. The system may further include one or more sensors. The sensors may be configured to generate a signal indicative of at least one measured parameter of air flow across the one or more fuel cells. The system may also include a controller in communication with the one or more fuel cells, the compressor, and the sensors. The controller may be configured to determine a desired pressure drop based on at least one calculated parameter, determine a control command for the compressor based on the desired pressure drop, and adjust the control command based on a feedback gain parameter and a feed forward gain parameter.
摘要:
An electrochemical cell includes a pair of bipolar plates and a membrane electrode assembly between the bipolar plates. The electrochemical cell further includes a first seal defining a high pressure zone, wherein the first seal is located between the bipolar plates and configured to contain a first fluid within the high pressure zone. Further, the electrochemical cell includes a second seal defining an intermediate pressure zone, wherein the second seal is located between the bipolar plates and configured to contain a second fluid within the intermediate pressure zone. The first seal is configured to leak the first fluid into the intermediate pressure zone when the first seal unseats.
摘要:
An electrochemical cell is disclosed comprising, a first flow structure, a second flow structure, and a membrane electrode assembly disposed between the first and second flow structures. The electrochemical cell further comprises a pair of bipolar plates, wherein the first flow structure, the second flow structure, and the membrane electrode assembly are positioned between the pair of bipolar plates. The electrochemical cell also includes a spring mechanism, wherein the spring mechanism is disposed between the first flow structure and the bipolar plate adjacent to the first flow structure, and applies a pressure on the first flow structure in a direction substantially toward the membrane electrode assembly.
摘要:
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 (“ΔT”).
摘要:
Described herein are embodiments directed to fixtures for mounting fuel cells, the fixtures comprising at least one internal frame member; a first endplate assembly comprising a first seal frame, and a first active area compression plate, and a second endplate assembly; wherein the internal frame member is located between the first endplate assembly and the second endplate assembly. Also described are methods of testing a fuel cell.