A channel plate structure includes a nonreactive portion and an electrochemical reactive portion. The nonreactive portion includes at least one manifold inlet, at least one manifold outlet, flow channels, and cutoff structures. The cutoff structures are respectively disposed in the flow channels, and the ratio of the total area of the cutoff structures to the area of the channel plate structure is 0.002 to 0.01 based on battery size. Each of the cutoff structures includes a gas-liquid separation compartment, a joint portion, and a convergent portion, wherein a width of the joint portion is smaller than or equal to that of the gas-liquid separation compartment, the convergent portion connects the gas-liquid separation compartment to the joint portion, and the cross-sectional area of a flow path at an downstream end of the convergent portion is smaller than that of the flow path at an upstream end of the same.

A channel plate structure includes a nonreactive portion and an electrochemical reactive portion. The nonreactive portion includes at least one manifold inlet, at least one manifold outlet, flow channels, and cutoff structures. The cutoff structures are respectively disposed in the flow channels, and the ratio of the total area of the cutoff structures to the area of the channel plate structure is 0.002 to 0.01 based on battery size. Each of the cutoff structures includes a gas-liquid separation compartment, a joint portion, and a convergent portion, wherein a width of the joint portion is smaller than or equal to that of the gas-liquid separation compartment, the convergent portion connects the gas-liquid separation compartment to the joint portion, and the cross-sectional area of a flow path at an downstream end of the convergent portion is smaller than that of the flow path at an upstream end of the same.

A flow field plate for a fuel cell, the flow field plate is provided with a plurality of fluid channels wherein at least one split block is provided between the fluid channels, at least one auxiliary microflow-channel is arranged in the split block, the microflow-channel changes flow rate and flow pressure of fluid at different sites along the fluid channel by having a depth and a width smaller than a depth and a width of the fluid channel at a confluent segment and also smaller than a depth and a width of the fluid channel at a diverging segment, so as to generate a pressure difference that forces fluid to flow into a diffusion layer. The flow field plate adjusts flow rate and pressure of fluid at different sites along the fluid channel, so as to transmit the reaction medium more effectively and removes generated water more effectively.

A flow field plate for a fuel cell, the flow field plate is provided with a plurality of fluid channels wherein at least one split block is provided between the fluid channels, at least one auxiliary microflow-channel is arranged in the split block, the microflow-channel changes flow rate and flow pressure of fluid at different sites along the fluid channel by having a depth and a width smaller than a depth and a width of the fluid channel at a confluent segment and also smaller than a depth and a width of the fluid channel at a diverging segment, so as to generate a pressure difference that forces fluid to flow into a diffusion layer. The flow field plate adjusts flow rate and pressure of fluid at different sites along the fluid channel, so as to transmit the reaction medium more effectively and removes generated water more effectively.

A fuel cell separator includes ribs. The fuel cell separator has a plurality of gas flow paths separated from each other by the ribs. The fuel cell separator has, on a surface of the ribs on the gas flow path side, a liquid water flow path provided separately from the gas flow paths along the gas flow paths. The liquid water flow path has an expanded region in which a cross-sectional area of the liquid water flow path in a direction perpendicular to a flow direction of the liquid water flow path is larger than a cross-sectional area of the liquid water flow path in the direction perpendicular to the flow direction in a remaining region of the liquid water flow path.

An illustrative example fuel cell cooler plate includes a first side configured to be received adjacent a fuel cell component and a second side facing opposite the first side. The first side defines a first surface area of the plate. An edge is transverse to the first side and the second side. The edge has a surface area that is less than the first surface area. A first coolant passage within the plate is closer to the second side than the first side. A second coolant passage is between the first side and the first coolant passage. The second coolant passage is in a heat exchange relationship with the first coolant passage.

An illustrative example fuel cell cooler plate includes a first side configured to be received adjacent a fuel cell component and a second side facing opposite the first side. The first side defines a first surface area of the plate. An edge is transverse to the first side and the second side. The edge has a surface area that is less than the first surface area. A first coolant passage within the plate is closer to the second side than the first side. A second coolant passage is between the first side and the first coolant passage. The second coolant passage is in a heat exchange relationship with the first coolant passage.

Disclosed are a leaf vein flow channel bionic air-cooled fuel cell module supporting lung air intake, and a method thereof. A circular columnar stack is arranged in a cylindrical impeller and is placed in a cylindrical sealing volute, such that the circular columnar stack is suitable for the cylindrical body structure of drones and unmanned submersibles. A cathode surface and an anode surface are integrated on a same bipolar plate. The cathode surface adopts a mesh vein distribution pattern imitating veins of a lotus leaf, and the anode surface adopts a distribution pattern imitating veins of a banana leaf. In this way, even diffusion of gas is facilitated, and gas reaction is even. In addition, parasitic power consumed by a motor driving an impeller is small.

Disclosed are a leaf vein flow channel bionic air-cooled fuel cell module supporting lung air intake, and a method thereof. A circular columnar stack is arranged in a cylindrical impeller and is placed in a cylindrical sealing volute, such that the circular columnar stack is suitable for the cylindrical body structure of drones and unmanned submersibles. A cathode surface and an anode surface are integrated on a same bipolar plate. The cathode surface adopts a mesh vein distribution pattern imitating veins of a lotus leaf, and the anode surface adopts a distribution pattern imitating veins of a banana leaf. In this way, even diffusion of gas is facilitated, and gas reaction is even. In addition, parasitic power consumed by a motor driving an impeller is small.

A load receiver member of a fuel cell separator member of a fuel cell stack includes an attachment portion disposed between an outer peripheral portion of a first metal separator and an outer peripheral portion of a second metal separator, and a tab continuous with the attachment portion and protruding from an outer peripheral portion of a joint separator. The attachment portion is joined to the outer peripheral portion of the joint separator by a joint portion.