Abstract: A fuel cell (FC) assembly having a stack that includes a bipolar plate and a gas diffusion layer (GDL) composed of a microporous metal foam having embedded therein a plurality of discrete microchannels or a plurality of discrete microstructures.

Abstract: A thermal management system to cool one or more battery packs of a battery system may include a heat pipe arrangement that includes a plurality of heat pipes, having a planar configuration, in thermal contact with the one or more battery packs to draw heat therefrom, and a heat sink arrangement that includes a plurality of heat sinks, in thermal contact with two or more edges of the heat pipe arrangement, to dissipate heat away from the heat pipe arrangement.

Abstract: The present disclosure discloses a photosensitive resin composition and a use the same. The resin composition of the present disclosure includes 40-70 parts by weight of an alkali-soluble resin, 20-50 parts by weight of a photopolymerizable monomer, 0.5-10.0 parts by weight of a photoinitiator, and 0.1-10.0 parts by weight of additives. The photopolymerizable monomer includes 0.5-15.0 parts by weight of a monomer containing carbonate structure. The photosensitive resin composition is used as a dry film resist.

Abstract: A bipolar plate-gas diffusion layer (GDL) assembly for a polymer-electrolyte-membrane fuel cell includes a flat metallic bipolar plate and a porous metal GDL adjacent to and in direct contact with the flat metallic bipolar plate. The porous metal GDL includes flow channels defined by flow channels walls with flow channel surfaces. The flow channel walls and flow channel surfaces have an average porosity generally equal to an average porosity of an interior of the porous metal GDL.

Abstract: A cooling structure for a vehicle battery cell assembly includes a receptacle having a thermally-conductive floor. At least one first thermally conductive structure is positioned in an interior of the receptacle and in direct physical contact with a first side of the floor, and at least one second thermally conductive structure positioned in the interior of the receptacle in direct physical contact with the at least one first thermally conductive structure and spaced apart from the first side of the floor by the first thermally conductive structure. The cooling structure also includes a coolant conduit having an inlet, an outlet, and a flow passage in fluid communication with the coolant conduit inlet and outlet, the flow passage being in direct physical contact with an exterior of the receptacle along a second side of the floor opposite the first side of the floor.

Abstract: One or more methods of fabricating a microscale canopy wick structure having an array of individual wicks having one or more canopy members. Each method includes selectively etching a substrate to control the thickness of the canopy members and also control the width of a fluid flow channel between adjacent wicks in a manner that enhances the overall performance of the microscale canopy wick structure.

Abstract: A fuel cell assembly, a heat pipe for such a fuel cell assembly, and a fuel cell stack. The fuel cell assembly includes a fuel cell having an MEA structure, and a pair of heat pipe separator plates in physical and thermal contact with a planar surface of the fuel cell. Each heat pipe separator plate includes an external heat transfer fin to dissipate a portion of the heat generated by the fuel cell through exposed outer peripheral edges thereof. Each heat pipe separator plate also includes voids formed in an interior planar surface thereof, to be aligned with voids of other heat pipe separator plates when the fuel cell assembly is arranged in a stack. Upper voids are to define upper interior channels in fluid communication with a portion of the air stream supplied to the cathode. A heat transfer insert is arranged in the upper voids, and includes internal heat transfer fins to dissipate another portion of the heat into the upper interior channels for contact with the air stream.

Abstract: A passive thermal management system is provided for a fuel cell stack, along with methods for maintaining a uniform temperature across a fuel cell stack during cold weather conditions. The system includes a plurality of fuel cells arranged as a fuel cell stack. The fuel cell stack includes a main body portion defining an exterior surface and having first and second opposing end walls. The system includes a first end frame component having a first phase change material in thermal communication with the first end wall. A second end frame component is provided having a second phase change material in thermal communication with the second end wall. An insulation layer is wrapped around the exterior surface of the main body portion and is provided in thermal communication with the plurality of fuel cells.

Abstract: Thermal management systems include a heat generating device that is to be kept within a desired temperature range. A thermoregulating layer coats, or is otherwise positioned in adjacent proximity to the heat generating device. The thermoregulating layer includes a Ni—Mn based Heusler alloy that exhibits an unprecedented differential in thermal conductivity across a relevant temperature range, based on a martensitic transition from an asymmetric lattice structure to a symmetric lattice structure with increasing temperature.

Abstract: The present disclosure discloses a photosensitive resin composition and a use the same. The resin composition of the present disclosure includes 40-70 parts by weight of an alkali-soluble resin, 20-50 parts by weight of a photopolymerizable monomer, 0.5-10.0 parts by weight of a photoinitiator, and 0.1-10.0 parts by weight of additives. The photopolymerizable monomer includes 0.5-15.0 parts by weight of a monomer containing carbonate structure. The photosensitive resin composition is used as a dry film resist. It has characteristics such as easy breakage of film strip, smaller film strip fragments, faster film strip speed, excellent flexibility, and good circuit resolution and adhesion, thereby effectively improving production efficiency and product yield.

Abstract: A thermal management system to cool one or more battery packs of a battery system may include a heat pipe arrangement that includes a plurality of heat pipes, having a planar configuration, in thermal contact with the one or more battery packs to draw heat therefrom, and a heat sink arrangement that includes a plurality of heat sinks, in thermal contact with two or more edges of the heat pipe arrangement, to dissipate heat away from the heat pipe arrangement.

Abstract: An acoustic unit includes an acoustically septumized cell, and a vapor chamber attached across the cell. The vapor chamber is configured to employ vapor-liquid phase changing to help move heat past the cell.

Abstract: A cooling structure for a vehicle battery cell assembly includes a receptacle having a thermally-conductive floor. At least one first thermally conductive structure is positioned in an interior of the receptacle and in direct physical contact with a first side of the floor, and at least one second thermally conductive structure positioned in the interior of the receptacle in direct physical contact with the at least one first thermally conductive structure and spaced apart from the first side of the floor by the first thermally conductive structure. The cooling structure also includes a coolant conduit having an inlet, an outlet, and a flow passage in fluid communication with the coolant conduit inlet and outlet, the flow passage being in direct physical contact with an exterior of the receptacle along a second side of the floor opposite the first side of the floor.

Abstract: One or more methods of fabricating a microscale canopy wick structure having an array of individual wicks having one or more canopy members. Each method includes selectively etching a substrate to control the thickness of the canopy members and also control the width of a fluid flow channel between adjacent wicks in a manner that enhances the overall performance of the microscale canopy wick structure.

Abstract: A fuel cell assembly, a heat pipe for such a fuel cell assembly, and a fuel cell stack. The fuel cell assembly includes a fuel cell having an MEA structure, and a pair of heat pipe separator plates in physical and thermal contact with a planar surface of the fuel cell. Each heat pipe separator plate includes an external heat transfer fin to dissipate a portion of the heat generated by the fuel cell through exposed outer peripheral edges thereof. Each heat pipe separator plate also includes voids formed in an interior planar surface thereof, to be aligned with voids of other heat pipe separator plates when the fuel cell assembly is arranged in a stack. Upper voids are to define upper interior channels in fluid communication with a portion of the air stream supplied to the cathode. A heat transfer insert is arranged in the upper voids, and includes internal heat transfer fins to dissipate another portion of the heat into the upper interior channels for contact with the air stream.

Abstract: A method of manufacturing a heat transfer device includes manipulating the microstructure of a metal alloy to thereby remove one or more chemical components of the alloy to form resultant heat pipe structure having an envelope composed of the precursor metal alloy and a porous wick structure composed of the dealloyed metal. Manipulation of the microstructure may be conducted by selective etching of a substrate composed of a metal or metal alloy using a dealloying process.

Abstract: A passive thermal management system is provided for a fuel cell stack, along with methods for maintaining a uniform temperature across a fuel cell stack during cold weather conditions. The system includes a plurality of fuel cells arranged as a fuel cell stack. The fuel cell stack includes a main body portion defining an exterior surface and having first and second opposing end walls. The system includes a first end frame component having a first phase change material in thermal communication with the first end wall. A second end frame component is provided having a second phase change material in thermal communication with the second end wall. An insulation layer is wrapped around the exterior surface of the main body portion and is provided in thermal communication with the plurality of fuel cells.

Abstract: A method of manufacturing a heat transfer device includes manipulating the microstructure of a metal alloy to thereby remove one or more chemical components of the alloy to form resultant heat pipe structure having an envelope composed of the precursor metal alloy and a porous wick structure composed of the dealloyed metal. Manipulation of the microstructure may be conducted by selective etching of a substrate composed of a metal or metal alloy using a dealloying process.

Abstract: Thermal management systems include a heat generating device that is to be kept within a desired temperature range. A thermoregulating layer coats, or is otherwise positioned in adjacent proximity to the heat generating device. The thermoregulating layer includes a Ni—Mn based Heusler alloy that exhibits an unprecedented differential in thermal conductivity across a relevant temperature range, based on a martensitic transition from an asymmetric lattice structure to a symmetric lattice structure with increasing temperature.

Abstract: An acoustic unit includes an acoustically septumized cell, and a vapor chamber attached across the cell. The vapor chamber is configured to employ vapor-liquid phase changing to help move heat past the cell.