Abstract: A hydrogel structure (10) includes: a continuous phase (11) of a first hydrogel; and a dispersion phase (12) of a second hydrogel, the dispersion phase being dispersed in the continuous phase (11). A ratio of a local minimum value of a load after break to a breaking load (a local minimum value of a load after break/a breaking load) of the hydrogel structure (10) is 0.1 or more.

Abstract: In a resin frame equipped MEA, an electrolyte membrane has an outer peripheral overlapping portion that overlaps with an inner peripheral portion of a resin frame member. An ion flow blocking member is provided on the outer peripheral overlapping portion. The ion flow blocking member blocks the flow of iron ions, copper ions, or the like. The ion flow blocking member is formed in an annular shape, and surrounds an electrical power generating region of the MEA. The ion flow blocking member can be provided in the form of a physical barrier or a chemical barrier.

Abstract: A method of selecting a thermoplastic-resin adhesive provided so as to be exposed to a fluid flow path of a power generation cell includes a load application step, an exposing step, a measurement step, and a selecting step. In the load application step, a compressive load is applied to a laminate body in a laminating direction thereof, the laminate body being formed by sandwiching an adhesive between a first resin film and a second resin film. In the exposing step, the laminate body is exposed to an environment heated to a predetermined temperature and humidified to a predetermined humidity. In the measurement step, a flow amount of the adhesive during the exposing step is measured. In the selecting step, the adhesive having the flow amount equal to or less than a predetermined amount is selected as an adhesive used for the power generation cell.

Abstract: A voltage is applied between an anode and a cathode in a fuel cell. The voltage is increased to a predetermined upper limit, and then decreased to a predetermined lower limit. The voltage increase and decrease are repeated a predetermined number of times. The voltage is applied to the fuel cell while supplying a hydrogen-containing gas to an anode and supplying an inert gas to a cathode.

Abstract: A spiral spring (5) has an inner circumferential end (5a) fixed to a rotor (3) and an outer circumferential end (5b) fixed to a plate (8) of a housing (2), and biases the rotor (3) in one direction with respect to the housing (2). A projection (13) protrudes from the plate (8), and stops radially outward expansion of an outermost winding (5c) of the spiral spring (5). A clip (6) has a first portion (6a) coming in contact with the outermost winding (5c) of the spiral spring (5), and is attached to the projection (13) by elastic force of the clip (6).

Abstract: A spiral spring (5) has an inner circumferential end (5a) fixed to a rotor (3) and an outer circumferential end (5b) fixed to a plate (8) of a housing (2), and biases the rotor (3) in one direction with respect to the housing (2). A projection (13) protrudes from the plate (8), and stops radially outward expansion of an outermost winding (5c) of the spiral spring (5). A clip (6) has a first portion (6a) coming in contact with the outermost winding (5c) of the spiral spring (5), and is attached to the projection (13) by elastic force of the clip (6).

Abstract: A voltage is applied between an anode and a cathode in a fuel cell. The voltage is increased to a predetermined upper limit, and then decreased to a predetermined lower limit. The voltage increase and decrease are repeated a predetermined number of times.

Abstract: A fuel cell stack includes a plurality of cell groups and a controller wherein each cell group comprises a plurality of fuel cells and a group sensor which measures one or more electrical characteristics of the respective cell group. The controller comprises one or more processors and memory and is communicatively coupled to each group sensor. The one or more processors execute machine readable instructions to compare a measured electrical characteristic of each cell group to one or more thresholds stored in memory, and indicate the need for diagnostics of the fuel cell stack when the comparison indicates a non-systemic event.

Abstract: Provided is a fuel cell including a plurality of stacked unit cells, each including a membrane-electrode assembly and a separator stacked on the membrane-electrode assembly. The separator includes a separator plate that overlaps the membrane-electrode assembly when seen from a stacking direction, a first terminal portion configured to protrude from the separator plate toward an outer side in a plane direction, a plate covering portion configured to cover an outer peripheral edge of the separator plate, and a terminal covering portion configured to be formed integrally with the plate covering portion and covers the first terminal portion. A plurality of the first terminal portions, which are adjacent to each other in the stacking direction, include offset portions which shift from each other when seen from the stacking direction, and are covered with the terminal covering portion.

Abstract: A fuel cell stack includes a plurality of cell groups and a controller wherein each cell group comprises a plurality of fuel cells and a group sensor which measures one or more electrical characteristics of the respective cell group. The controller comprises one or more processors and memory and is communicatively coupled to each group sensor. The one or more processors execute machine readable instructions to compare a measured electrical characteristic of each cell group to one or more thresholds stored in memory, and indicate the need for diagnostics of the fuel cell stack when the comparison indicates a non-systemic event.

Abstract: Provided is a fuel cell including a plurality of stacked unit cells, each including a membrane-electrode assembly and a separator stacked on the membrane-electrode assembly. The separator includes a separator plate that overlaps the membrane-electrode assembly when seen from a stacking direction, a first terminal portion configured to protrude from the separator plate toward an outer side in a plane direction, a plate covering portion configured to cover an outer peripheral edge of the separator plate, and a terminal covering portion configured to be formed integrally with the plate covering portion and covers the first terminal portion. A plurality of the first terminal portions, which are adjacent to each other in the stacking direction, include offset portions which shift from each other when seen from the stacking direction, and are covered with the terminal covering portion.