A metal component for electrochemical stack in an embodiment includes: a metal base material having a first surface exposed to an atmosphere containing hydrogen and a second surface exposed to an atmosphere containing oxygen; and a hydrogen permeation inhibition and protection coating provided on the first surface of the metal base material. The metal component for electrochemical stack in the embodiment can suppress metallic corrosion also in the case where one side is in contact with air and the other side is in contact with an atmosphere containing hydrogen.

A metal component for electrochemical stack in an embodiment includes: a metal base material having a first surface exposed to an atmosphere containing hydrogen and a second surface exposed to an atmosphere containing oxygen; and a hydrogen permeation inhibition and protection coating provided on the first surface of the metal base material. The metal component for electrochemical stack in the embodiment can suppress metallic corrosion also in the case where one side is in contact with air and the other side is in contact with an atmosphere containing hydrogen.

An electrochemical system having two metallic separator plates, an electrochemical cell arranged between the separator plates and sealed by at least one sealing element, and fixing elements for fixing the separator plates. The fixing elements comprise at least two fixing elements which are designed as integral with the first or with the second separator plate, which differ from the at least one sealing element, are spaced apart from the at least one sealing element parallel to the plate planes of the separator plates, and project at least in sections beyond the plate planes of the separator plates in a stacking direction. The first fixing element is thereby supported on the second fixing element in such a way that the second fixing element prevents a displacement of the first separator plate relative to the second separator plate.

A metal separator is applied to a fuel cell. A method of producing the metal separator involves performing a plate processing step of forming a bead base, and a rubber seal forming step of providing a rubber seal by screen printing for the bead base formed in the plate processing step. The rubber seal forming step includes a first protrusion forming step of forming a first protrusion at the central part in the width direction of a top portion of the bead base, in a cross sectional view taken along a thickness direction of the rubber seal, and a second protrusion forming step of forming a second protrusion configured to cover the first protrusion after the first protrusion forming step.

A metal separator is applied to a fuel cell. A method of producing the metal separator involves performing a plate processing step of forming a bead base, and a rubber seal forming step of providing a rubber seal by screen printing for the bead base formed in the plate processing step. The rubber seal forming step includes a first protrusion forming step of forming a first protrusion at the central part in the width direction of a top portion of the bead base, in a cross sectional view taken along a thickness direction of the rubber seal, and a second protrusion forming step of forming a second protrusion configured to cover the first protrusion after the first protrusion forming step.

A first metal separator includes a seal bead protruding from a base plate. The seal bead includes a curved section having a curved shape in a plan view of the first metal separator. The combination of the radius of curvature and the angle of the curved section is set within a specific zone where variation in a seal surface pressure in a direction in which the seal bead extends is suppressed.

A first metal separator includes a seal bead protruding from a base plate. The seal bead includes a curved section having a curved shape in a plan view of the first metal separator. The combination of the radius of curvature and the angle of the curved section is set within a specific zone where variation in a seal surface pressure in a direction in which the seal bead extends is suppressed.

The invention relates to a method for producing a bipolar plate (5), comprising the following steps: a. providing two planar components (7), which are present in particular in a stacked manner, b. integrally bonding the two planar components (7), in particular by welding, in a joining plane (34), wherein, prior to integrally bonding, internal stresses (9) are introduced into at least one of the two planar components (7). The invention also relates to a fuel cell (1) comprising a bipolar plate (5) produced according to this method.

The invention relates to a method for producing a bipolar plate (5), comprising the following steps: a. providing two planar components (7), which are present in particular in a stacked manner, b. integrally bonding the two planar components (7), in particular by welding, in a joining plane (34), wherein, prior to integrally bonding, internal stresses (9) are introduced into at least one of the two planar components (7). The invention also relates to a fuel cell (1) comprising a bipolar plate (5) produced according to this method.

A bipolar plate with an enhanced fluid flow field design is provided for a fuel cell. The bipolar plate includes an inlet, an outlet, and a flow field having a pattern defining a plurality of microchannels configured to provide fluid communication between the inlet and the outlet. The pattern is designed using an inverse permeability field, and is based on a reaction-diffusion algorithm to model channel spacing, thereby providing a variable pitch microchannel pattern to direct fluid from the inlet to the outlet. In various aspects, the reaction-diffusion algorithm utilize Gray-Scott reaction-diffusion equations, which may be used to obtain an anisotropic microchannel layout. The variable pitch microchannel pattern may include a channel spacing based on effective medium theory.