Abstract: The invention relates to a method for filling a storage volume (2) of a fuel gas tank (1) with fuel gas, in which the fuel gas is introduced into the storage volume (2) via a fueling path (3) with an integrated tank valve (4) and with the aid of a sensor (5) integrated in the fueling path (3), the temperature of the fuel gas is sensed in the area of a bottleneck point (7), which is formed by the sensor (5) and/or a holding body (8) on which the sensor (5) is mounted. The invention further relates to a fuel gas tank (1) and a fuel gas tank system having at least one fuel gas tank (1) according to the invention.

Abstract: The invention relates to a bipolar plate (7) for an electrochemical cell (1), said bipolar plate comprising at least one first monopolar plate (13) having a first bead (15) and a second monopolar plate (17) having a second bead (19), the first bead (15) and the second bead (19) being arranged opposite one another and forming a channel (21), the first bead (15) and the second bead (19) each comprising a central base surface (23) and at least two inclined surfaces (24), and the first bead (15) and/or the second bead (19) comprising at least one outer base surface (25).

Abstract: The invention relates to a bipolar plate (7) for an electrochemical cell (1), said bipolar plate comprising at least one first monopolar plate (13) having a first bead (15) and a second monopolar plate (17) having a second bead (19), the first bead (15) and the second bead (19) being arranged opposite one another and forming a channel (21), the first bead (15) and the second bead (19) each comprising a central base surface (23) and at least two inclined surfaces (24) and the first bead (15) and/or the second bead (19) comprising at least one outer base surface (25), and wherein the at least one outer base surface (25) and/or the central base surface (23) have at least one opening (27) for the passage of at least one medium (29). The invention also relates to an arrangement of electrochemical cells (1) and a method for operating an arrangement of electrochemical cells (1).

Abstract: The invention relates to a method of operating and/or fueling a compressed gas supply system (34) having at least two compressed gas tanks (15, 16, 17, 18, 19) connected to an anode path (2) of a fuel cell system (1). To increase thermal safety during operation and/or fueling of the compressed gas supply system (34), the valve devices (21, 22, 23, 24, 25) assigned to the pressure tanks (15, 16, 17, 18, 19), which comprise a filling path with an actively switchable filling valve and a discharge path with an actively switchable discharge valve for each of the compressed gas tanks (15, 16, 17, 18, 19) are individually actuated via an electronic control unit, which is connected to a sensor device having at least one sensor, which senses a current temperature in the respective valve installation (21, 22, 23, 24, 25).

Abstract: The invention relates to a fuel gas tank (1) for a fuel gas tank system, said fuel gas tank comprising: a storage volume (3) which is enclosed by a wall (2) and can be filled with fuel gas via a tank line (4) having an integrated tank valve (5); and a temperature sensor (6) for sensing the temperature in the fuel gas tank (1), wherein the temperature sensor (6) is located outside the storage volume (3) and thermally connected to the storage volume (3) via a thermal conductor (7) projecting into the storage volume (3). The invention also relates to a fuel gas tank system comprising at least one fuel gas tank (1) according to the invention.

Abstract: A tank system for a fuel cell system comprises a tank which extends along a longitudinal axis for receiving gas, in particular hydrogen, comprising an outer circumferential surface which encloses the longitudinal axis along a circumferential direction; a strip-shaped cooling device which is thermally coupled to the tank and comprises at least one Peltier element, wherein the cooling device is arranged on the outer circumferential surface of the tank and extends along the circumferential direction of the tank; and a securing element which encloses the outer circumferential surface of the tank in the circumferential direction and presses the cooling device against the outer circumferential surface of the tank.

Abstract: Tank device (1) for storing a gaseous medium, in particular hydrogen, comprising at least one tank container (2) and a feed line (4) which can be connected to the at least one tank container (2), said at least one tank container (2) being fluidically connected to the feed line (4) by means of at least one valve (8, 10). The at least one tank container (2) is fluidically connected to a connection line (11) via at least one valve (8, 10), wherein a frame-shaped housing element (24) is arranged in the tank device (1), said housing element (24) surrounding the at least one tank container (2) and the feed line (4). The housing element (24) can additionally be thermally activated.

Abstract: The invention relates to a fuel cell system comprising a fuel cell assembly with at least one fuel cell, a fuel inlet, a fuel outlet, a supply line which is connected to the fuel inlet for supplying gaseous fuel, a discharge line which is connected to the fuel outlet for discharging excess fuel, a recirculation line which connects the discharge line and the supply line, a recirculation compressor which is arranged in the recirculation line and which is designed to generate a fluid flow of the excess fuel from the discharge line to the supply line, said fluid having a speed component in a circumferential direction of the recirculation line, and a water separator which is arranged between the recirculation compressor and the supply line and which comprises a receiving chamber arranged on the exterior of the recirculation line with respect to the radial direction and which is connected to the recirculation line via at least one discharge opening formed in the recirculation line in order to receive liquid constit

Abstract: The invention relates to a conveying device (1) for a fuel cell system (31) for conveying and/or recirculating a gaseous medium, in particular hydrogen, comprising: a side channel compressor (2), the conveying device (1) being driven at least partially by means of a metering valve (6) having a propulsion jet (12) of a pressurized gaseous medium, and the pressurized gaseous medium being fed to the side channel compressor (2) at least indirectly by means of the metering valve (6); a compressor chamber (30) which extends around an axis of rotation (23) in the housing (17) and has at least one circumferential side channel (19); an impeller (14) which is located in the housing (17), is rotatable about the axis of rotation (23) and is driven by the drive (10), the side channel compressor (2) having a housing (17) with a gas inlet opening (20) formed on the housing (17) and a gas outlet opening (22), which are fluidically connected to one another via the compressor chamber (30), in particular the at least one first

Abstract: A foil bearing (10) having at least one foil (16, 18), which is arranged and fixed in place inside a bearing bushing (12). In order to simplify the production, in particular assembly, of the foil bearing (10), the bearing bushing (12) has at least two openings (20, 22, 24) offset from each other in the circumferential direction of the bearing bushing (12) or depressions (120, 122, 124) made in the inner lateral surface of the bearing bushing, into which openings or depressions two opposing circumferential end sections (16 a, 16 b, 18 a, 18 b) of the at least one foil (16, 18) engage.

Abstract: The invention relates to a bipolar plate (7) for an electrochemical cell (1), said bipolar plate comprising at least one first monopolar plate (13) having a first bead (15) and a second monopolar plate (17) having a second bead (19), the first bead (15) and the second bead (19) being arranged opposite one another and forming a channel (21), the first bead (15) and the second bead (19) each comprising a central base surface (23) and at least two inclined surfaces (24) and the first bead (15) and/or the second bead (19) comprising at least one outer base surface (25), and wherein the at least one outer base surface (25) and/or the central base surface (23) have at least one opening (27) for the passage of at least one medium (29). The invention also relates to an arrangement of electrochemical cells (1) and a method for operating an arrangement of electrochemical cells (1).

Abstract: The invention relates to a bipolar plate (7) for an electrochemical cell (1), said bipolar plate comprising at least one first monopolar plate (13) having a first bead (15) and a second monopolar plate (17) having a second bead (19), the first bead (15) and the second bead (19) being arranged opposite one another and forming a channel (21), the first bead (15) and the second bead (19) each comprising a central base surface (23) and at least two inclined surfaces (24), and the first bead (15) and/or the second bead (19) comprising at least one outer base surface (25).

Abstract: The invention relates to a bipolar plate (7) for an electrochemical cell (1), said bipolar plate comprising a first monopolar plate (13) and a second monopolar plate (17), at least one port (55), a seal (47), and an active surface (53), wherein the first monopolar plate (13) and/or the second monopolar plate (17) have at least one opening element (111) for the passage of at least one medium (29), the at least one opening element (111) is located between the at least one port (55) and the active surface (53) and has a first opening surface (113) and a second opening surface (115), wherein the first opening surface (113) and the second opening surface (115) have a common lateral line (117), and the first opening surface (113) and the second opening surface (115) are arranged at a deflection angle (119) to one another in a range of 30° to 120°. The invention also relates to an arrangement (69) of electrochemical cells (1) and to a method for operating the arrangement (69) of electrochemical cells (1).

Abstract: The invention relates to a method (100) for operating an inverter (1) which selectively connects each of three alternating current phases (U, V, W) of an inductive load (4) to the plus pole or minus pole of a direct current (2) provided at the input (1a) of the inverter (1) by actuating switching elements (3a-3f) arranged in three half bridges (5a-5c), wherein the switch states of the switching elements (3a-3f) are modified (110) by a rotating space vector modulation. Additionally, in the event of a modulation between space vectors (6a-6f) which have the same switch element (3a, 3d; 3b, 3e; 3c, 3f) switch states with respect to at least one half bridge (5a-5c), such a half bridge (5a-5c) remains completely deactivated (120).

Abstract: The invention relates to a fuel cell system (1) comprising a fuel cell stack (2) with a cathode (3), to which air can be fed as cathode gas via a cathode gas path (4), an air compressor (5) being integrated in the cathode gas path (4). According to the invention, the cathode gas path (4) branches downstream of the air compressor (5) into a main path (4.1), which can be connected to an inlet (6) of the fuel cell stack (2), and into a secondary path (4.2), which can be connected to an outlet (7) of the fuel cell stack (2), wherein the main path (4.1) and the secondary path (4.2) can each be shut off individually or together with the aid of a shut off device (8). The invention also relates to a method for operating a fuel cell system (1).

Abstract: The present invention relates to a fuel cell stack (10) and to a method for producing such a fuel cell stack (10). The fuel cell stack (10) comprises at least two fuel cell modules (58) with in each case at least two individual cells (5), each fuel cell module (58) having module end plates (70) on both cell stack outer sides (66), and fuel cell stack compression means (82), via which the fuel cell modules (58) stacked one on top of the other are braced to form a fuel cell stack (10).

Abstract: The invention relates to a bearing arrangement for a shaft in a turbocompressor having at least one water-fed hydraulic bearing, which is configured to support for rotation an axle of the turbocompressor, wherein the water-fed hydraulic bearing encloses the shaft at a circumference of the shaft to form a bearing gap therebetween; and wherein the water-fed hydraulic bearing is configured to allow water to flow through the bearing gap to support the shaft hydraulically; and two seals, which are designed to seal the bearing gap against the shaft; and wherein gas from the turbocompressor is applied to the two seals outside the bearing gap to seal the bearing.

Abstract: The invention relates to a method (100) for operating an inverter (1) which selectively connects each of three alternating current phases (U, V, W) of an inductive load (4) to the plus pole or minus pole of a direct current (2) provided at the input (1a) of the inverter (1) by actuating switching elements (3a-3f) arranged in three half bridges (5a-5c), wherein the switch states of the switching elements (3a-3f) are modified (110) by a rotating space vector modulation. Additionally, in the event of a modulation between space vectors (6a-6f) which have the same switch element (3a, 3d; 3b, 3e; 3c, 3f) switch states with respect to at least one half bridge (5a-5c), such a half bridge (5a-5c) remains completely deactivated (120).

Abstract: The invention relates to a foil bearing (10) having at least one foil (16, 18), which is arranged and fixed in place inside a bearing bushing (12). In order to simply the production, in particular assembly, of the foil bearing (10), the bearing bushing (12) has at least two openings (20, 22, 24) offset from each other in the circumferential direction of the bearing bushing (12) or depressions (120, 122, 124) made in the inner lateral surface of the bearing bushing, into which openings or depressions two opposing circumferential end sections (16a, 16b, 18a, 18b) of the at least one foil (16, 18) engage.

Abstract: The present invention relates to a fuel cell stack (10) and to a method for producing such a fuel cell stack (10). The fuel cell stack (10) comprises at least two fuel cell modules (58) with in each case at least two individual cells (5), each fuel cell module (58) having module end plates (70) on both cell stack outer sides (66), and fuel cell stack compression means (82), via which the fuel cell modules (58) stacked one on top of the other are braced to form a fuel cell stack (10).