Abstract: A method for producing a sealing element on a gas diffusion layer of an electrochemical unit including the following is provided: arranging an injection molding tool on the gas diffusion layer; and introducing injection molding material into a cavity of the injection molding tool. The injection molding tool includes at least one deformation delimiting element, which delimits or prevents a deformation of the gas diffusion layer during the introduction of the injection molding material into the cavity such that damage to the gas diffusion layer is avoided and a sealing element with a mechanically stable connection region is produced.

Abstract: The invention relates to a liquid separator (100), in particular for a fuel cell device, the liquid separator (100) comprising the following: a fluid-conducting channel (104), a collection region (106) for collecting liquid originating from a fluid that is conducted in the fluid-conducting channel (104), a liquid passage (110) branching off from the fluid-conducting channel (104) and a liquid collection region (112) into which the liquid passage (110) leads.

Abstract: The invention relates to a fuel cell device (300), the fuel cell device (300) comprising the following: a fuel cell stack (100) and a cell suspension element (202) connecting a cell (200) of the fuel cell stack (100) to an abutment (118).

Abstract: The invention relates to a fuel cell device (300), the fuel cell device (300) comprising the following: a tension anchor element (138); tension bracing elements, e.g., tension anchor plates (142), connected via the tension anchor element (138), and a tension anchor stabilizer (270) which is in contact with the tension anchor element (138) between the tension bracing elements.

Abstract: The invention relates to a fuel cell device (300), in particular for a means of transport, wherein the fuel cell device (300) comprises the following: a fuel cell stack (100), and a stack longitudinal axis stabilizer (116), wherein at least one region of the stack longitudinal axis stabilizer (116) is arranged between a stack surface of the fuel cell stack (100) extending in parallel with the stack longitudinal axis and an abutment (118).

Abstract: The aim of the invention is to provide a fuel cell device (100) which is easy and cost-effective to manufacture and preferably can be safely operated. In order to achieve said aim, it is proposed according to the invention that the fuel cell device (100) comprises the following: —a fuel cell stack unit (102); —a casing (104) which delimits an interior chamber (124), in which the fuel cell stack unit (102) is arranged; wherein the casing (104) has at least one wall (130), preferably a casing lid (118), and wherein the fuel cell stack unit (102) is secured to the wall (118), preferably to the casing lid (118).

Abstract: In order to improve a fuel cell device comprising at least one fuel cell unit and a conduit arrangement, in particular for a fuel medium and/or for an oxidation medium and/or for a temperature-control medium, it is proposed to arrange in the conduit arrangement, in particular in a conduit portion thereof, a combined component forming a heat exchanger and a fluid modifier that forms in particular a separator.

Abstract: A method is provided for producing an electrochemically active unit that includes a membrane and at least one assembly, which includes a gas diffusion layer and a sealing element produced on the gas diffusion layer. The method is reliably performable with less expenditure on process apparatuses and process time and includes the following: producing the sealing element on the gas diffusion layer; connecting the sealing element and/or the gas diffusion layer to a support element; and assembling the membrane and the at least one assembly, which includes the gas diffusion layer and the sealing element, to form the electrochemically active unit.

Abstract: An assembly for an electrochemical device is provided, including a gas diffusion layer and a sealing element produced on the gas diffusion layer. The sealing element includes an inner sealing region fixed to the gas diffusion layer and an outer sealing region connected to the gas diffusion layer via the inner sealing region. The assembly has minimal warpage without the temperature in the injection molding tool having to be lowered and/or a geometric pre-compensation of the warpage of the sealing element in the inner sealing region. The sealing element includes a relief region arranged between the inner and outer sealing regions and a) includes a relief opening extending through the sealing element and/or b) has a smallest height (he), which is smaller than both one fourth of the greatest height (HI) of the inner sealing region and one fourth of the greatest height (HA) of the outer sealing region.

Abstract: The present invention relates to a method for starting a fuel cell stack at temperatures below the freezing point of a reaction product produced during the reaction between an anode-side fuel and a cathode-side fuel. The fuel cell stack comprises a plurality of individual cells having at least one internal cell which is arranged in the stacking direction in the interior of the fuel cell stack and an edge cell which is arranged in the stacking direction at the edge of the fuel cell stack. The fuel cell stack is connected to a cooling circuit having cooling fluid for cooling the fuel cell stack, which cooling fluid can be conducted through the fuel cell stack by a pump arranged in the cooling circuit.

Abstract: The aim of the invention is to provide a fluid-conducting module for a fuel cell device, said fluid-conducting module being simple and inexpensive to produce and being used to operate a fuel cell device in a preferably efficient manner. According to the invention, this is achieved in that the fluid-conducting module comprises the following: a flow channel which comprises at least one flow channel inlet and at least one flow channel outlet and through which a first fluid, in particular a liquid, can be conducted; a heat exchanger, by means of which a second fluid, in particular a gas, can be heated, preferably by transferring heat from the first fluid to the second fluid.

Abstract: In order to provide a fuel cell device which is easy and cost-effective to manufacture and preferably has improved durability, it is proposed according to the invention that the fuel cell device comprises the following: -a fuel cell stack unit; -a supporting frame, in particular a housing, in which the fuel cell stack unit is arranged, -a bearing device, by means of which the fuel cell stack unit is mounted in the supporting frame, in particular in the housing, wherein the fuel cell device comprises a fixed bearing device and a floating bearing device, wherein the floating bearing device comprises one or more floating bearing units.

Abstract: Proposed is a bipolar plate for a fuel cell device, wherein the bipolar plate is formed from a plurality of flat products, in particular arranged one above the other in a vertical direction, wherein one or each of at least some of the plurality of flat products has an alignment structure or a plurality of alignment structures, and at least one alignment structure of at least one flat product, at least in the state in which the plurality of flat products are arranged one above the other, is accessible and/or is exposed by the other one or more of the plurality of flat products.

Abstract: A fuel cell device is provided, including a fuel cell stack, which includes a plurality of fuel cell units following each other in a stacking direction, and two end plates, between which the fuel cell stack is arranged. With the fuel cell device, harmful effects from hydrogen exiting the fuel cell units are avoided without making access to the fuel cell units impossible or causing a disproportionately large maintenance expenditure. The fuel cell device includes an enclosure which surrounds the fuel cell stack and the end plates, wherein the free remaining volume that remains within the enclosure between the enclosure, the fuel cell stack, and the end plates is less than 20% of the internal volume of the enclosure.

Abstract: In order to provide a bipolar plate that has optimized electrical conductivity and can be produced as easily as possible, the invention proposes that the bipolar plate comprises an electrically conductive main body and an electrically conductive coating, wherein the electrically conductive coating comprises a binding material and one or more electrically conductive fillers, and wherein a pigment volume concentration in the coating corresponds at least to a pigment volume concentration required to achieve a percolation threshold.

Abstract: The invention relates to a flow element, in particular, as a component of a bipolar plate of an electrochemical device, comprising a plate-like base body that extends in two main directions of extension that are oriented at an angle in relation to one another, and has an extension in a height direction that is oriented transversely and in particular perpendicularly thereto, wherein the base body has a channel structure having a plurality of channels that are arranged laterally adjacent to one another, wherein the channels are formed by recesses in the base body and are separated from one another by raised portions, arranged between the recesses, of the base body, wherein regions having a normal level difference, defined in the height direction, as a height difference between a raised portion and an adjoining recess are provided, as well as regions having a level difference, reduced in comparison with the normal level difference, as a height difference between a raised portion and an adjoining recess, wherein,

Abstract: In order to provide an electrochemically active unit for an electrochemical device including a membrane electrode assembly, at least one gas diffusion layer and a seal that is linked to at least one of the at least one gas diffusion layers, in the manufacture whereof as even as possible a construction of the penetration region in which the gas diffusion layer of the electrochemically active unit is penetrated by the sealing material of the seal over the periphery of the gas diffusion layer is achievable, the seal includes a linking region, a distribution region and a connection region that connects the linking region and the distribution region to one another, wherein the connection region has a minimum height that is less than a quarter of the maximum height of the distribution region and less than a quarter of the maximum height of the linking region.