Fuel cell unit (1) in the form of a fuel cell stack (1) for electrochemical generation of electrical energy, comprising fuel cells (2) having anodes, cathodes, proton-exchange membranes, gas diffusion layers and bipolar plates, the fuel cell unit (1) comprising at least one latent heat storage device (45) with a phase change material (46) to prevent water from freezing in the fuel cells (2) or delay such freezing

Systems and methods for separator plates, bipolar plates, stacks of plates, and electrochemical systems, comprising at least one through-opening for the passage of a fluid and a rim that delimits the through-opening. The rim having a curved course and a rectilinear course that adjoins the curved course. A bead arrangement extends around the curved course and the rectilinear course. An edge portion spans the bead arrangement and the rim, so that the bead arrangement is situated at a distance from the rim. A cutout formed in the curved course, so that a minimum distance of the bead arrangement from the rim is smaller in the curved course than in the rectilinear course.

The invention relates to a fuel cell system and associated method of manufacture. The fuel cell system has at least a first surface region and a second surface region, wherein the first surface region is more hydrophilic than the second surface region, wherein the first and second surface regions are arranged in accordance with a parameter distribution of the fuel cell system.

Methods and systems are provided for manufacturing a bipolar plate for a redox flow battery. In one example, the bipolar plate is fabricated by a roll-to-roll process. The bipolar plate includes a non-conductive substrate that is coupled to a negative electrode on a first surface and coupled to a positive electrode on a second surface, the first surface opposite of the second surface.

The invention relates to a method for producing a sealed fuel cell (101) for a fuel cell stack (100), comprising a cathode-side distributor plate (K), an anode-side distributor plate (A) and a membrane electrode unit (MEA), said method comprising the following steps: 1) providing a cathode-side distributor plate (K) and an anode-side distributor plate (A), 2) providing a first film web (B1) for sealing the cathode-side distributor plate (K) and a second film web (B2) for sealing the anode-side distributor plate (A), 3) punching a cathode-side distributor structure (VK) for the cathode-side distributor plate (K) out of the first film web (B1) and an anode-side distributor structure (VA) for the anode-side distributor plate (A) out of the second film web (B2), 4) cutting the first film web (B1) to produce a first seal (D1) for the cathode-side distributor structure (VK) and cutting the second film web (B2) to produce a second seal (D2) for the anode-side distributor structure (VA), 5) placing the first seal (D1) on the cathode-side distributor plate (K) and the second seal (D2) on the anode-side distributor plate (A), 6) heating the cathode-side distributor plate (K) and the anode-side distributor plate (A) in order to connect together the first seal (D1) on the cathode-side distributor plate (K) and the second seal (D2) on the anode-side distributor plate (A) in an integrally joined manner, more particularly to melt said seals together.

To provide a space-saving bipolar plate for a fuel cell comprising an anode plate and a cathode plate, anode gas channels and cathode gas channels lead from main gas ports on opposite sides into an active area and are distributed across the width of said area such that they are subsequently diverted towards an opposite distribution area, and the coolant channels branch in the distribution area and, after branching, are diverted towards the anode gas channels and towards the cathode gas channels and, in each region of overlap with the anode gas channels and the cathode gas channels, are diverted collectively such that the coolant channels lead, together with the anode gas channels and the cathode gas channels, into the active area with no overlap and alternatingly with said anode gas channels and cathode gas channels.

A fluid guiding assembly for fuel cells, including a channel structure and a gas diffusion layer arranged on the channel structure, the channel structure defining flow field channels extending from a first end of the channel structure to an opposite second end, wherein a porous distributor is arranged at both ends of the channel structure, extending over the entire width of the channel structure.

Methods and systems are provided for manufacturing a bipolar plate for a redox flow battery. In one example, the bipolar plate is fabricated by a roll-to-roll process. The bipolar plate includes a non-conductive substrate that is coupled to a negative electrode on a first surface and coupled to a positive electrode on a second surface, the first surface opposite of the second surface.

A redox flow battery. The redox flow battery has a plurality of cells stacked on each other and three or more conductive terminals. The redox flow battery is able to vary a charge voltage and a discharge voltage by switching control.

A redox flow battery. The redox flow battery has a plurality of cells stacked on each other and three or more conductive terminals. The redox flow battery is able to vary a charge voltage and a discharge voltage by switching control.