Abstract: The invention relates to a fuel cell stack (1) comprising at least one bipolar plate (3), at least one gas diffusion layer (5) and at least one electrolyte, in particular at least one membrane (7), wherein a coating (9) is arranged as a connecting means between the at least one bipolar plate (3) and the at least one gas diffusion layer (5) and the coating (9) is electrically conductive. The invention further relates to a method for producing the fuel cell stack (1).

Abstract: Disclosed is a bipolar plate (20) for an electrochemical cell (100), in particular a fuel cell. The bipolar plate (20) includes at least one insert (21) used for connection to a membrane-electrode assembly (1).

Abstract: Disclosed is a bipolar plate (20) for an electrochemical cell (100), in particular a fuel cell. The bipolar plate (20) includes at least one polymeric connecting element (21) for connection to a membrane-electrode assembly (1).

Abstract: The invention relates to a method of attaching a gasket (4) to a bipolar plate (12). The method comprises the steps of applying and aligning a first gasket foil (4a) to a second gasket foil (4b) having connection recesses (8), connecting the first gasket foil (4a) to the second gasket foil (4b), so that the gasket (4) is formed, placing the gasket (4) on the bipolar plate (12) so that the second gasket film (4b) with the bonding recesses (8) abuts the bipolar plate (12) and performing an embossing step in which an embossing force is applied with an embossing tool (20) in the region of the connecting recesses (8) so that an embossed adhesive point (24) is formed and the first gasket foil (4a) is bonded to the bipolar plate (12) via an adhesive means (16) arranged in the connecting recess (8) on the first gasket foil (4a).

Abstract: Disclosed is a membrane-electrode unit (1) for an electrochemical cell (100), wherein the membrane-electrode unit (1) comprises a frame structure (10) for accommodating a membrane (2) coated with electrodes (3, 4). The frame structure (10) comprises a first film (11) and a second film (12), wherein the first film (11) is bonded to the second film (12) in a bonding region (15) by means of an adhesive (13). A spacing structure (20) is formed at least on one of the two films (11, 12), in the bonding region (15).

Abstract: Disclosed is a membrane-electrode unit (1) for an electrochemical cell (100), wherein the membrane-electrode unit (1) comprises a frame structure (10) for accommodating a membrane (2) coated with electrodes (3, 4). The frame structure (10) comprises a first film (11) and a second film (12), between which an adhesive (13) is disposed. The first film (11) and the second film (12) are melted together in a bonding region (15).

Abstract: A method for forming a thermally conductive connection between a plurality of battery cells (2) and a temperature-regulating body (1) of a battery module (100), wherein, in a first method step, an adhesive (3) comprising at least one first component (31) and at least one second component (32) is applied to the temperature-regulating body (1) or to the plurality of battery cells (2), wherein a first proportion (41) of the at least one first component (31) and/or a second proportion (42) of the at least one second component (32) is changed during the application of the adhesive (3) over the temperature-regulating body (1) or the plurality of battery cells (2), wherein, in a second method step, the plurality of battery cells (2) is connected to the temperature-regulating body (1) in such a way that an inhomogeneous material bond is formed between the plurality of battery cells (2) and the temperature-regulating body (1).

Abstract: The present invention relates to a filter unit (100, 301) for filtering a fluid (105) for the operation of a fuel cell. The filter unit (100, 301) comprises at least one filter element (101) filled with a filter material (103) comprising cyclodextrin. The presented Invention also relates to a fuel cell system, to the use of cyclodextrin to filter a fluid for the operation of a fuel cell system, and to a method for operating a fuel cell system.

Abstract: The invention relates to an electrochemical system unit comprising a plurality of electrochemical cells that are arranged in layers side by side, each cell comprising an anode plate, a cathode plate and a sealing element, wherein the sealing element is designed to seal a space between the anode and cathode plate. Said system also comprises at least two electrochemical cells of the electrochemical system unit having different manufacturing types of the sealing elements.

Abstract: Fuel cell unit in the form of a fuel cell stack for producing electrical energy in an electrochemical manner, comprising fuel cells, the fuel cells each comprising a proton exchange membrane, an anode, a cathode, a gas diffusion layer, a bipolar plate, at least one fluid channel for the passage of a fluid, at least one seal (11) composed of a sealing material (42) for sealing off the at least one fluid channel (37), wherein particles (41) composed of a particle material (43) are arranged in the sealing material (42) of the at least one seal (11), for the purpose of extending the diffusion path (38) of the fluid which is sealed off by the at least one seal (11).

Abstract: A process for joining a battery element (49) by at least one polymer thread (28, 30), comprises the method steps: a) applying a web-shaped or sheet-shaped electrode material (16) to a first separator web (12), b) heating the at least one polymer thread (28, 30) above the softening temperature of the polymer material, c) introducing at least one polymer thread (28, 30) between the first separator web (12) and a further second separator web (40) to be applied to the first separator web (12), and d) cooling the at least one polymer thread (28, 30) between the separator webs (12, 40) and forming at least one material-bond compound (46, 48) therebetween.

Abstract: A method for manufacturing a battery cell (1) and a battery cell (1) comprises providing a battery housing (3) and introducing electrodes (5) and an electrolyte (9) into the battery housing (3). At least partial regions (23) of a surface, in particular an outer surface, of the battery housing (3) are coated with a diffusion barrier layer (25) made of a polymer material (27) and then the polymer material (27) of the diffusion barrier layer (25) is oxidized at least on the surface to form an oxide layer (29). The polymer material (27) may be in particular silicone so that the oxide layer (29) consists of silicon dioxide. An oxide layer (29) thus generated increases a barrier effect of the diffusion barrier layer (25) considerably and may be generated using technically simple means, such as for example an atmospheric pressure plasma.

Abstract: A cell housing plate for the arrangement of round cells, comprising a cover plate arranged on the top side of the cell housing plate, and a base plate arranged opposite the cover plate on the underside of the cell housing plate, wherein the cover plate and the base plate have a plurality of cut-outs arranged opposite each other for receiving the round cells, wherein the cut-outs each have a collar pointing radially towards the inside of the cut-out for receiving a sealant, and an opening arranged inside the collar for passage of the round cells, wherein the cover plate and the base plate are arranged relative to each other such that the cut-outs of the cover plate and the opposite cut-outs of the base plate form cavities for receiving sealant for sealing the round cells which may be arranged inside the cell housing plate.

Abstract: A method for forming a thermally conductive connection between a plurality of battery cells (2) and a temperature-regulating body (1) of a battery module (100), wherein, in a first method step, an adhesive (3) comprising at least one first component (31) and at least one second component (32) is applied to the temperature-regulating body (1) or to the plurality of battery cells (2), wherein a first proportion (41) of the at least one first component (31) and/or a second proportion (42) of the at least one second component (32) is changed during the application of the adhesive (3) over the temperature-regulating body (1) or the plurality of battery cells (2), wherein, in a second method step, the plurality of battery cells (2) is connected to the temperature-regulating body (1) in such a way that an inhomogeneous material bond is formed between the plurality of battery cells (2) and the temperature-regulating body (1).

Abstract: A method for forming a connection between a first battery cell (1) and a second battery cell (2), wherein, in a first method step, an adhesive (3) comprising at least one first component (31) and at least one second component (32) is applied to the first battery cell (1), wherein a first proportion (41) of the at least one first component (31) and/or a second proportion (42) of the at least one second component (32) is changed during the application of the adhesive (3) over the first battery cell (1), wherein, in a second method step, the first battery cell (1) is connected to the second battery cell (2) in such a way that an inhomogeneous material bond is formed between the first battery cells (1) and the second battery cell (2).

Abstract: A battery cell (1) has electrodes (9), an electrolyte (7) and a housing (3) surrounding the electrodes (9) and the electrolytes (7). The housing (3) is composed of a plurality of housing components (11) adhesively bonded to one another by an adhesive composite (13) along opposite abutment faces (21). The adhesive composite (13) has a first adhesive composite component (15) which is interposed between the opposite abutment faces (21) and which is resistant and impermeable to the electrolyte (9); a second adhesive composite component (17) which is over regions of the two housing components (11) adjacent to the first adhesive composite component (15), and which is composed of a cured material; and a third adhesive composite component (19) which is over regions of the two housing components (11) adjacent to the second adhesive composite component (17) and which is impermeable to water and/or oxygen.

Abstract: A cell housing plate for the arrangement of round cells, comprising a cover plate arranged on the top side of the cell housing plate, and a base plate arranged opposite the cover plate on the underside of the cell housing plate, wherein the cover plate and the base plate have a plurality of cut-outs arranged opposite each other for receiving the round cells, wherein the cut-outs each have a collar pointing radially towards the inside of the cut-out for receiving a sealant, and an opening arranged inside the collar for passage of the round cells, wherein the cover plate and the base plate are arranged relative to each other such that the cut-outs of the cover plate and the opposite cut-outs of the base plate form cavities for receiving sealant for sealing the round cells which may be arranged inside the cell housing plate.

Abstract: A method for manufacturing a battery cell (1) and a battery cell (1) comprises providing a battery housing (3) and introducing electrodes (5) and an electrolyte (9) into the battery housing (3). At least partial regions (23) of a surface, in particular an outer surface, of the battery housing (3) are coated with a diffusion barrier layer (25) made of a polymer material (27) and then the polymer material (27) of the diffusion barrier layer (25) is oxidized at least on the surface to form an oxide layer (29). The polymer material (27) may be in particular silicone so that the oxide layer (29) consists of silicon dioxide. An oxide layer (29) thus generated increases a barrier effect of the diffusion barrier layer (25) considerably and may be generated using technically simple means, such as for example an atmospheric pressure plasma.

Abstract: A process for joining a battery element (49) by at least one polymer thread (28, 30), comprises the method steps: a) applying a web-shaped or sheet-shaped electrode material (16) to a first separator web (12), b) heating the at least one polymer thread (28, 30) above the softening temperature of the polymer material, c) introducing at least one polymer thread (28, 30) between the first separator web (12) and a further second separator web (40) to be applied to the first separator web (12), and d) cooling the at least one polymer thread (28, 30) between the separator webs (12, 40) and forming at least one material-bond compound (46, 48) therebetween.

Abstract: The invention describes a battery cell (1) which has electrodes (9), an electrolyte (7) and a housing (3) which surrounds the electrodes (9) and the electrolytes (7). The housing (3) is composed of a plurality of housing components (11) in this case. The battery cell is distinguished in that the housing components (11) are adhesively bonded to one another in a sealed manner by an adhesive composite (13) along opposite abutment faces (21).