In order to create an electrochemical device, comprising a plurality of electrochemical units, which succeed one another along a stack direction, wherein each electrochemical unit comprises a bipolar plate and an electrically insulating seal, and a clamping device for clamping the electrochemical units along the stack direction, in which electrochemical device the risk of a short circuit between adjacent bipolar plates is reduced without the expenditure for the production of the electrochemical device being excessively increased, it is proposed that at least one seal of at least one electrochemical unit in the pressed state protrudes laterally beyond a contour of the bipolar plate of the electrochemical unit in a direction of protrusion directed perpendicularly to the stack direction.

A fuel cell comprises a polymer electrolyte membrane, an anode electrode being associated with said membrane on the first side thereof and a cathode electrode being associated with said membrane on the second side thereof, wherein a gas diffusion layer is associated with each of the electrodes on the side thereof that faces away from the polymer electrolyte membrane, and wherein a flow field plate having a flow field for distributing the reactants is associated with each of the gas diffusion layers on the side thereof that faces away from the polymer electrolyte membrane, characterized in that at least one conducting line formed from a hygroscopic and/or capillary-active material is provided for conducting water and thus for moistening the polymer electrolyte membrane.

A fuel cell comprises a polymer electrolyte membrane, an anode electrode being associated with said membrane on the first side thereof and a cathode electrode being associated with said membrane on the second side thereof, wherein a gas diffusion layer is associated with each of the electrodes on the side thereof that faces away from the polymer electrolyte membrane, and wherein a flow field plate having a flow field for distributing the reactants is associated with each of the gas diffusion layers on the side thereof that faces away from the polymer electrolyte membrane, characterized in that at least one conducting line formed from a hygroscopic and/or capillary-active material is provided for conducting water and thus for moistening the polymer electrolyte membrane.

A redox battery comprises a plurality of redox battery cells stacked in a stacking direction, wherein each of the redox battery cells comprises a first half cell connected to a positive current collector, a second half cell connected to a negative current collector and an ion exchange membrane separating the first and second half cells. The redox battery additionally comprises a positive conducting bus bar extending in the stacking direction and electrically connecting the positive current collectors of the redox battery cells in parallel, and a negative conducting bus bar extending in the stacking direction and electrically connecting the negative current collectors of the redox battery cells in parallel. One or both of the positive and negative bus bars are configured as fastening means for mechanically fastening the stacked redox battery cells in the stacking direction

A redox battery comprises a plurality of redox battery cells stacked in a stacking direction, wherein each of the redox battery cells comprises a first half cell connected to a positive current collector, a second half cell connected to a negative current collector and an ion exchange membrane separating the first and second half cells. The redox battery additionally comprises a positive conducting bus bar extending in the stacking direction and electrically connecting the positive current collectors of the redox battery cells in parallel, and a negative conducting bus bar extending in the stacking direction and electrically connecting the negative current collectors of the redox battery cells in parallel. One or both of the positive and negative bus bars are configured as fastening means for mechanically fastening the stacked redox battery cells in the stacking direction

Disclosed is a separator assembly for a fuel cell and a fuel cell stack including the same. The separator assembly includes (I) a plate-shaped first separator including a first reaction area where a flow path to which a reaction gas or a coolant flows on a center thereof and first manifolds to which the reaction gas or the coolant is introduced or discharged to opposite side areas of the first reaction area, and (ii) a plate-shaped second separator integrated with the first separator by bonding and including a second reaction area corresponding to a position where the first reaction area is formed and second manifolds communicating with the first manifolds. The first and second separators may have at least a portion of an inner edge of the respective first and second manifolds that are bent, thereby being disposed on an interface between the first and second separators.

Disclosed is a separator assembly for a fuel cell and a fuel cell stack including the same. The separator assembly includes (I) a plate-shaped first separator including a first reaction area where a flow path to which a reaction gas or a coolant flows on a center thereof and first manifolds to which the reaction gas or the coolant is introduced or discharged to opposite side areas of the first reaction area, and (ii) a plate-shaped second separator integrated with the first separator by bonding and including a second reaction area corresponding to a position where the first reaction area is formed and second manifolds communicating with the first manifolds. The first and second separators may have at least a portion of an inner edge of the respective first and second manifolds that are bent, thereby being disposed on an interface between the first and second separators.

A fuel cell comprising a membrane electrode gas diffusion layer assembly, a resin frame, a first separator and a second separator, wherein the resin frame comprises an opening in which the membrane electrode gas diffusion layer assembly can be disposed, and a skeleton surrounding the opening, and wherein the second separator comprises a convexity at four corners of a region which is a part abutting the resin frame and which faces an inner peripheral edge of the skeleton, and the second separator abuts the resin frame in a state that the convexities are engaged with the resin frame, or wherein the second separator comprises an adhesive at the four corners of the region which is the part abutting the resin frame and which faces the inner peripheral edge of the skeleton, and the second separator is attached to the resin frame via the adhesive.

A fuel cell comprising a membrane electrode gas diffusion layer assembly, a resin frame, a first separator and a second separator, wherein the resin frame comprises an opening in which the membrane electrode gas diffusion layer assembly can be disposed, and a skeleton surrounding the opening, and wherein the second separator comprises a convexity at four corners of a region which is a part abutting the resin frame and which faces an inner peripheral edge of the skeleton, and the second separator abuts the resin frame in a state that the convexities are engaged with the resin frame, or wherein the second separator comprises an adhesive at the four corners of the region which is the part abutting the resin frame and which faces the inner peripheral edge of the skeleton, and the second separator is attached to the resin frame via the adhesive.

In a manufacturing method for fuel cell separators having a seal part of convex shape that is pushed when superimposed with another separator, the method includes: a first pressing step of imparting work hardening to an entire region to become a convex shape configuring the seal part; and a second pressing step of press molding the region work hardened in the first pressing step so as to become a convex shape.