Gamper, Bettina

The present invention relates to a detection device (10) and a corresponding method for detecting hydrogen from a gas volume (Vg). The technique employs a hydrogen oxidizing catalytic converter material (11) arranged exposed to the gas volume (Vg). According to the invention, a temperature (Tcc) of the catalytic converter material (11) is detected and compared with at least one predetermined exothermic temperature (Texo) associated with a thermal impact of exothermic heat from oxidation reaction activities at the catalytic converter material (11). Depending on a determination of the comparison result, a hydrogen detection result is generated for indicating different available domains of detection result including a presence, a leakage intensity, a quantity or a concentration of hydrogen in the gas volume (Vg).

The present invention relates to a system (100) for accommodating electrochemical cell stacks (10A, 10B) comprising a housing (20) and a compression system (30) for applying a compression force on the electrochemical cells in the stacking direction (S). According to the invention, the system (100) comprises internal liners (23) extending through the housing (20) in a stacking direction (S) having open ends to the outside of the housing (20), for separating a gas volume (y) inside the liners (23) from an inner space gas volume (x) of the housing (20); wherein each of the tensioning means (32) of the compression system (30) extends through one of the liners (23).

The present invention relates to a system (100) for accommodating electrochemical cell stacks (10A, 10B) comprising a housing (20) and a compression system (30). According to the invention, a receptive element (13) separate from the housing (20), is arranged to an end of the at least one electrochemical cell stack (10A, 10B) and extending through a wall of the housing (20) for receiving the compression force exerted by compression system (30) and transmitting it on said end of the at least one electrochemical cell stack (10A, 10B), a gasket structure (42, 43) is arranged between the housing (20) and one of the end elements (11) of the at least one electrochemical cell stack (10A, 10B), wherein the receptive element (13) provides an adjustable clamping structure (12, 14, 15, 41; 17, 18, 19, 44) for providing compressive function for the gasket structure (42, 43) sealing the gas volume inside the housing (20) from the outside of the housing (20).

The invention is related to a cell voltage pickup ("CVP") sub-assembly (12) for conveying voltages of unit cells of a fuel cell or electrolyzer stack to a cell voltage monitoring ("CVM") system and a CVP assembly (100) for mounting to a fuel cell or electrolyzer stack. A CVP unit (10) comprises a printed circuit board ("PCB") (20) for conducting electricity, at least one pick-up (50) for electrically connecting one of the unit cells and the PCB (20), and a means of communicating stack voltages (22) to a CVM system. The CVP sub-assembly (12) comprises the CVP unit (10) and a carrier bracket (30) for retaining the CVP unit (10), wherein the carrier bracket (30) comprises at least one through-hole feature (40) for mounting to a glide rod (110). The CVP assembly (100) comprises a CVP sub-assembly (12), at least one glide rod (110), and mounting brackets (120) for mounting the CVP assembly (100) to a fuel cell or electrolyzer stack.

The present invention relates to a sealing device (100) for sealing a membrane electrode assembly (210) of an electrolyser cell (200) against one or more bipolar plates (220) of the electrolyser cell (200). The sealing device (100) comprises a seal (110), which extends in a width direction (101) between two opposite seal surface sides (111, 112) for sealing against respective seal counter-surfaces (211, 221) of the electrolyser cell (200) and further comprises a seal lateral side (113), which is provided laterally of the seal surface sides (111, 112). The sealing device (100) comprises further at least one limiter (120) for limiting a compression of the seal (110) in the width direction (101) by engaging two opposite limiter surface sides (121, 122) of the limiter (120) with the seal counter-surfaces (211, 221). The limiter (120) comprises further a limiter lateral side (123), which is provided laterally of the limiter surface sides (121, 122). At least a part of the limiter lateral side (123) is mechanically connected to at least a part of the seal lateral side (113).

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Unique unit cell assemblies (20) for a solid polymer electrolyte fuel cell stack and improved methods for making them are disclosed in which the methods initially comprise bonding a single gas diffusion layer to a flow field plate assembly (6) using an elastomeric seal (17), e.g. a liquid injection mold seal. Sealing of the unit cell assembly (20) does not rely on penetrating the gas diffusion layer with elastomer. The method provides for reliable unit cell assemblies (20) while advantageously allowing for use of higher viscosity elastomers and reducing waste.

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …