Abstract: The present invention relates to a method for determining the compressive tensile force acting on a fuel cell stack due to at least one tensioning element. Thereby, the compressive tensile force is the overall tensile force compressing the fuel cell stack. This is determined according to the invention by means of acoustic measurements on vibratable sections of the tensioning elements. The subject matter of the invention also includes a data processing program for carrying out the method according to the invention along with the use of a smartphone for carrying out the method according to the invention.

Abstract: The present invention relates to a method for determining the compressive tensile force acting on a fuel cell stack due to at least one tensioning element. Thereby, the compressive tensile force is the overall tensile force compressing the fuel cell stack. This is determined according to the invention by means of acoustic measurements on vibratable sections of the tensioning elements. The subject matter of the invention also includes a data processing program for carrying out the method according to the invention along with the use of a smartphone for carrying out the method according to the invention.

Abstract: The invention relates to a method for producing a catalyst coated membrane (19) for a fuel cell (10), wherein the catalyst coated membrane (19) has a membrane (11) and a catalyst layer (12, 13) of a catalytic material arranged on at least one of its flat sides, as well as a nonrectangular active area (20), which is restricted in one direction by two outer sides (30) opposite one another. The method comprises a continuous application of the catalytic material to a membrane material (33) while creating a constant coating width (B) such that an area (35) coated with the catalytic material corresponds to at least the active area (20). A provision is that the membrane material (33) be coated with the catalytic material such that a coating direction (D) has an angle with respect to the opposite outer sides (30) of the active area (20) that is not equal to 90° and not equal to 0°.

Abstract: The invention relates to a bipolar plate (10) for a fuel cell (100), comprising—an internal coolant flow field (33), which comprises a coolant channel (43), and—a first and a second flat side (11, 12) with a first and second reactant flow field (31, 32) respectively, which has at least one first and second channel structure (41, 42) respectively, wherein—the first and the second channel structure (41, 42) each form a trunk channel (44) and branch channels (46), wherein the branch channels (46) branch off in a branching region (48) from the respective trunk channel (44), and a first intermediate region (51) is formed between the branch channels (46) of the first channel structure (31), and a second intermediate region (52) is formed between the branch channels (46) of the second channel structure (32), wherein normal projections of the first and second intermediate region (51, 52) onto a center plane (56) of the bipolar plate (10), which center plane is arranged between the two flat sides (11, 12) of the bipol

Abstract: The invention relates to a bipolar plate (10) for a fuel cell (100), comprising—an internal coolant flow field (33), which comprises a coolant channel (43), and—a first and a second flat side (11, 12) with a first and second reactant flow field (31, 32) respectively, which has at least one first and second channel structure (41, 42) respectively, wherein—the first and the second channel structure (41, 42) each form a trunk channel (44) and branch channels (46), wherein the branch channels (46) branch off in a branching region (48) from the respective trunk channel (44), and a first intermediate region (51) is formed between the branch channels (46) of the first channel structure (31), and a second intermediate region (52) is formed between the branch channels (46) of the second channel structure (32), wherein normal projections of the first and second intermediate region (51, 52) onto a center plane (56) of the bipolar plate (10), which center plane is arranged between the two flat sides (11, 12) of the bipol

Abstract: The invention relates to a method for producing a catalyst coated membrane (19) for a fuel cell (10), wherein the catalyst coated membrane (19) has a membrane (11) and a catalyst layer (12, 13) of a catalytic material arranged on at least one of its flat sides, as well as a nonrectangular active area (20), which is restricted in one direction by two outer sides (30) opposite one another. The method comprises a continuous application of the catalytic material to a membrane material (33) while creating a constant coating width (B) such that an area (35) coated with the catalytic material corresponds to at least the active area (20). A provision is that the membrane material (33) be coated with the catalytic material such that a coating direction (D) has an angle with respect to the opposite outer sides (30) of the active area (20) that is not equal to 90° and not equal to 0°.