Electrolyzer structure

Abstract

The invention relates to an electrolyzer or redox battery structure, comprising a first frame (1) and a second frame (2), intended to be stacked in an electrolyzer or redox battery, each frame being provided with a distribution face (6) for the distribution of a first electrolyte, respectively a second electrolyte, and a support face. Illustration: Fig. 1

Description

Title of the invention: Electrolyzer structure

[0001] The invention relates to an electrolyzer or redox battery structure. The invention further relates to an electrolyzer or redox battery cell equipped with such a structure and an electrolyzer comprising a stack of such cells.

[0002] An electrolyzer for the electrolysis of water constitutes an electrochemical reactor configured to subject water to an electromotive force so as to generate dioxygen and dihydrogen by electrolysis of water.

[0003] This type of electrolyzer generally comprises a stack of cells, each having two frames sandwiching a membrane, each frame allowing the diffusion of an electrolyte through a porous material.

[0004] The electrolysis reaction occurring in the cells generates heat which, for optimal operation of the electrolyzer, must be dissipated. Generally, the electrolyte, from which the water is intended to be electrolyzed, is also used as a carrier to remove the heat generated by the electrolysis reaction from the stack.

[0005] Each cell delimits an oxygen compartment (or anodic compartment) between an anodic plate and the membrane, for the recovery of dioxygen and a hydrogen compartment (or cathodic compartment) between a cathodic plate and the membrane, for the recovery of dihydrogen.

[0006] The anodic plate and the cathodic plate can be connected together to form a bipolar plate.

[0007] To meet hydrogen cost targets, cell components are often rectangular to minimize material waste. Furthermore, cells are becoming increasingly larger to generate more gas. In this context, it is important to ensure a good seal for the electrolyte, from the compartment to its entry into the porous material, which is essential for achieving good performance. To achieve this seal, however, it is necessary to avoid stressing the frames, particularly by subjecting them to excessive deformation.

[0008] The present invention aims to effectively overcome these drawbacks by proposing an electrolyzer or redox battery structure, comprising a first frame and a second frame, intended to be stacked in an electrolyzer or redox battery, each being provided with a distribution face for the distribution of a first electrolyte, respectively a second electrolyte, and a support face, the first frame, respectively the second frame comprising: - a collector inlet orifice passing through the frame, to bring the first electrolyte, respectively the second electrolyte, to the distribution face, the inlet collector orifice being surrounded by a fifth sealing bead provided on the bearing face; - an outlet collector orifice passing through the frame to evacuate the first electrolyte, respectively the second electrolyte, from the distribution face, the outlet collector orifice being surrounded by a sixth sealing bead provided on the support face; - a central housing, in particular for receiving a porous material, surrounded by a seventh sealing bead provided on the supporting face; - a first light formed through the frame, for the passage of the second electrolyte, respectively of the first electrolyte, in a direction of a thickness of the frame and in a first direction of circulation, the first light being surrounded by a first sealing bead provided on the distribution face and being surrounded by a third sealing bead provided on the support face; - a second light formed through the frame, for the passage of the second electrolyte, respectively of the first electrolyte, in the direction of the thickness of the frame and in a second direction of circulation opposite to the first direction of circulation, the second light being surrounded by a second sealing bead provided on the distribution face and being surrounded by a fourth sealing bead provided on the support face; - a distribution cavity provided on the distribution face, to allow the distribution of the first electrolyte, respectively of the second electrolyte, from the inlet collector orifice to the central housing; - an evacuation cavity provided on the distribution face, to allow the evacuation of the first electrolyte, respectively of the second electrolyte, from the central housing to the outlet collector orifice, the distribution cavity, and in particular the evacuation cavity, comprising a central distribution basin connected fluidly, by a first end to a plurality of first channels formed by reliefs and hollows and by a second end to a plurality of second channels formed by reliefs and hollows; the first and second frames being stacked so that the bearing face of the first frame is oriented towards the bearing face of the second frame, and being stacked so that the inlet collector orifice of the first frame is aligned with the second opening of the second frame, and so that the outlet collector orifice of the first frame is aligned with the first opening of the second frame, the structure being configured so that there is a plane orthogonal to the plane in which the first frame extends, intersecting one of the sealing beads of one of the faces of the first frame, in particular passing through a top of said sealing cord, said plane passing through a first bead made on the other face of the first frame, said plane passing through a second bead made on one face of the second frame and said plane passing through a third bead made on the other face of the second frame.

[0009] Such an arrangement makes it possible to improve the transfer of force with respect to the sealing cords, and therefore to improve the sealing of such a structure when mounted in an electrolyzer or a redox battery.

[0010] Such a force transfer, when the structure is tightly mounted in a stack of electrolyzer or redox battery cells, ensures high-pressure sealing, for example, a pressure of at least 30 barg, while preventing excessive deformation of the frames. This type of cell sealing can thus be ensured against external leaks as well as between the compartments of the stack.

[0011] According to one embodiment, the first, second and third ridges each have a raised portion, in particular projecting from a flat surface of the first frame or the second frame.

[0012] According to one embodiment, at least one of the first bead, the second bead and the third bead, forms a portion of one of the sealing cords, in particular a groove of one of the sealing cords.

[0013] According to one embodiment, at least one of the first ridge, the second ridge and the third ridge, forms a relief of at least one of the plurality of the first or second channels.

[0014] According to one embodiment, at least one of the first ridge, the second ridge and the third ridge forms an overthickness of at least one of the reliefs forming the plurality of the first or second channels.

[0015] According to one embodiment, at least one of the first, second sealing cords is provided with grooves, in particular parallel to each other, projecting from the distribution face and / or at least one of the third, fourth, fifth, sixth and seventh sealing cords is provided with a plurality of grooves, in particular parallel to each other, projecting from the support face.

[0016] According to one embodiment, the first frame, respectively the second frame, has an eighth sealing cord provided on the distribution face and is configured to contain the first electrolyte, respectively the second electrolyte, in a central distribution zone relative to a peripheral border of the frame, when stacked in an electrolyzer or in a redox battery.

[0017] According to one embodiment, the structure is configured such that there exists a plane orthogonal to the plane in which the first frame extends, intersecting the eighth sealing bead of the first frame, in particular by passing through a vertex of said sealing bead, said plane passing through the first bead formed on the bearing face of the first frame, said plane passing through the second ridge, said plane passing through the third ridge.

[0018] According to one embodiment, the structure is configured so that a portion, in particular a longitudinal portion, of the seventh sealing cord of the second frame is aligned with at least a part of the second channels of the first frame to ensure a transfer of force onto the reliefs of the second channels of the first frame when the frames are stacked.

[0019] According to one embodiment, the first and second frames are stacked so that the first light of the first frame is aligned, in particular edge to edge, with the inlet collector orifice of the second frame and so that the second light of the first frame is aligned, in particular edge to edge, with the outlet collector orifice of the second frame.

[0020] According to one embodiment, the first and second frames are stacked so that the central housing of the first frame is aligned, in particular edge to edge, with the central housing of the second frame.

[0021] According to one embodiment, the first frame and / or the second frame is composed of a polymer.

[0022] According to one embodiment, the central housing has a hole through the frame.

[0023] According to one embodiment, the structure is configured such that a portion, in particular a longitudinal portion of the second sealing cord of the second frame is aligned with at least part of the first channels of the first frame, to ensure a transfer of force onto the reliefs of the first channels when the frames are stacked.

[0024] According to one embodiment, the structure is configured so that there is a plane orthogonal to the plane in which the frames extend, cutting at least one of the second channels of the first frame in the transverse direction and cutting a longitudinal portion of the seventh sealing cord of the first frame, in particular cutting a longitudinal portion of the seventh sealing cord of the second frame.

[0025] According to one embodiment, the structure is configured so that there is a plane orthogonal to the plane in which the frames extend, cutting at least one of the first channels of the first frame in the transverse direction and cutting a longitudinal portion of the second sealing cord of the second frame and cutting in particular a longitudinal portion of the fourth sealing cord of the second frame.

[0026] According to one embodiment, the plurality of first channels is configured to form baffles so that the first electrolyte, respectively the second electrolyte, flows by forming meanders.

[0027] According to one embodiment, the plurality of second channels forms a comb so that the first electrolyte flows out in a homogeneous jet.

[0028] According to one embodiment, each of the first channels is configured to open into the inlet collector orifice to fluidly connect the inlet collector orifice and the central distribution bowl.

[0029] According to one embodiment, each of the second channels is configured to open into the outlet collector orifice to fluidly connect the central distribution bowl and the central housing.

[0030] According to one embodiment, the central distribution zone encompasses both the inlet collector orifice, the distribution cavity, the evacuation cavity, the central housing 10 and the outlet collector orifice.

[0031] According to one embodiment, the eighth sealing cord is provided with grooves, in particular parallel to each other, protruding from the distribution face.

[0032] According to one embodiment, at least one of the sealing cords is configured so that one of its grooves is less high than another of its grooves, in particular one located on the periphery of the cord.

[0033] According to one embodiment, at least one of the sealing cords is configured so that one of its grooves has a profile distinct from another of its grooves.

[0034] According to one embodiment, a vertex of at least one striation in the plurality of striations has a height between 20 and 200 microns.

[0035] Such grooves make it possible to significantly improve sealing against high pressures.

[0036] According to one embodiment, at least one of the sealing cords, in particular each sealing cord has a band raised relative to the plane of the frame, in particular being continuous.

[0037] According to one embodiment, the reliefs forming the plurality of the first or second channels have an overthickness arranged opposite at least one of the grooves of the bearing face.

[0038] According to one embodiment, each frame is configured so that there is a plane orthogonal to the plane in which the frame extends, cutting the excess thickness of a relief forming the plurality of the first or second channels and a vertex of one of the grooves made on the support face.

[0039] According to one embodiment, the distribution cavity is configured so that the first electrolyte, respectively the second electrolyte, successively passes from the inlet collector orifice to the central housing: the plurality of first channels, the central distribution bowl and the plurality of second channels.

[0040] According to one embodiment, the first frame and the second frame are each in the form of the same mechanical part and are intended to be stacked so that the first frame is rotated 180° relative to the second frame.

[0041] The invention also relates to an electrolyzer or redox battery cell comprising at least one structure as described above, a membrane and two pores, the cell being configured so that the membrane is sandwiched between the two frames, each of the pores being disposed respectively in the central housing of each frame, the cell being configured so that each pore is traversed, one, by the first electrolyte and the other, by the second electrolyte.

[0042] The invention also relates to an electrolyzer comprising a stack of a plurality of cells as described above and at least one bipolar plate sandwiched between two cells.

[0043] According to one embodiment, the bipolar plate is metallic.

[0044] According to one embodiment, the electrolyzer is a PEM type electrolyzer or an alkaline type electrolyzer such as an AEM type electrolyzer, in particular for the electrolysis of water.

[0045] According to one embodiment, the electrolyzer includes a sealing film interposed between the bipolar plate and the cell, on each side of the bipolar plate.

[0046] According to one embodiment, the electrolyzer comprises a first collecting plate at a first end of the stack and a second collecting plate at a second end of the stack, for collecting an electric current.

[0047] The invention finally relates to a redox battery comprising a stack of a plurality of cells as described above.

[0048] The invention may also relate to any alternative device or method comprising any combination of the above or below features within the scope of the claims.

[0049] The invention will be better understood upon reading the following description and examining the accompanying figures. These figures are given only to illustrate, but in no way limit, the invention.

[0050] [Fig.1] represents a schematic view illustrating one of the faces of a frame of a structure according to the invention;

[0051] [Fig.2] represents a schematic view illustrating the other face of a frame of a structure according to the invention;

[0052] [Fig.3] represents a schematic and transparent view of a structure according to the invention;

[0053] [Fig.4] represents a schematic and cross-sectional view of an electrolyzer according to the invention;

[0054] [Fig. 5] represents a schematic and partial view of a detail of the section of the [Fig.4];

[0055] [Fig.6] represents a schematic cross-sectional and partial view of a detail of a structure according to the invention; and

[0056] [Fig.7] represents a schematic cross-sectional and partial view of a detail of a structure according to the invention.

[0057] Figure 1 represents the distribution face 6 of a first frame 1, or of a second frame 2, intended to be stacked in an electrolyzer 50 or in a redox battery. Figure 2 represents the support face 7 of the first frame 1, or of the second frame 2, of Figure 1.

[0058] An electrolyzer structure 50 or a redox battery comprises a first frame 1 and a second frame 2 as illustrated in [Fig. 1] and [Fig. 2] and intended to be stacked in an electrolyzer 50 or in a redox battery. The first frame 1 and second frame 2 are each provided with a distribution face 6 for the distribution of a first electrolyte, respectively a second electrolyte, and a support face 7.

[0059] The first frame 1 and the second frame 2 each comprise: - An inlet collector orifice 8; 9 passing through the frame, to bring the first electrolyte, respectively the second electrolyte, onto the distribution face 6, the inlet collector orifice 8; 9 being surrounded by a fifth sealing bead 35; 36 provided on the support face 7. - An outlet collector orifice 9; 8 passing through the frame to evacuate the first electrolyte, respectively the second electrolyte, from the distribution face 6, the outlet collector orifice 9; 8 being surrounded by a sixth sealing bead 36; 35 provided on the support face 7. - A central housing 10, notably for receiving a porous 3, surrounded by a seventh sealing bead 37 provided on the support face 7. - A first light 11; 12 formed through the frame, for the passage of the second electrolyte, respectively of the first electrolyte, in a direction of a thickness of the frame and in a first direction of circulation, the first light 11; 12 being surrounded by a first sealing cord 31; 32 provided on the distribution face 6 and being surrounded by a third sealing cord 33; 34 provided on the support face 7. - A second light 12; 11 formed through the frame, for the passage of the second electrolyte, respectively of the first electrolyte, in the direction of the thickness of the frame 1 and in a second direction of circulation opposite to the first direction of circulation, the second light 12; 11 being surrounded by a second sealing cord 32; 31 provided on the distribution face 6 and being surrounded by a fourth sealing cord 34; 33 provided on the support face 7. - A distribution cavity 16; 17 formed on the distribution face 6, to allow the distribution of the first electrolyte, respectively of the second electrolyte, from the inlet collector port 8; 9 to the central housing 10. - An evacuation cavity 17; 16 provided on the distribution face 6, to allow the evacuation of the first electrolyte, respectively of the second electrolyte, from the central housing 10 to the outlet collector orifice 9; 8, the distribution cavity 16; 17, and in particular the evacuation cavity 17; 16, comprising a central distribution basin 19 fluidically connected, by a first end to a plurality of first channels 18 formed by reliefs and hollows and by a second end to a plurality of second channels 20 formed by reliefs and hollows.

[0060] The structure is configured so that when the first frame 1 and second frame 2 are stacked: - the support face 7 of the first frame 1 is oriented towards the support face 7 of the second frame 2; - the inlet collector orifice 8 of the first frame 1 is aligned with the second light 11 of the second frame 2; - the outlet collector orifice 9 of the first frame 1 is aligned with the first light 12 of the second frame 2. - a portion, in particular a longitudinal portion, of the seventh sealing cord 37 of the second frame 2 is aligned with at least a part of the second channels 20 of the first frame 1 to ensure a transfer of force onto the reliefs of the second channels 20 of the first frame 1 when the first frame 1 and second frame 2 are stacked, in particular mounted tightly; - the first light 11 of the first frame 1 is aligned, in particular edge to edge, with the inlet collector orifice 8 of the second frame 2; - the second light 12 of the first frame 1 is aligned, in particular edge to edge, with the outlet collector orifice 9 of the second frame 2; - the central housing of the first frame 1 is aligned, in particular edge to edge, with the central housing of the second frame 2.

[0061] Alignment is considered when the first frame 1 and second frame 2 are stacked one on top of the other with or without the interposition of one or more intermediate pieces between them. Such alignment allows, in particular, the first electrolyte and the second electrolyte to flow through the stack by passing through the inlet collector 8 or outlet 9 of each frame of the stack in a direction along an axis intersecting all the frames of the stack.

[0062] The structure is configured so that a portion, in particular a longitudinal portion, of the second sealing bead 33 of the second frame 2 is aligned with at least a portion of the first channels 18 of the first frame 1, to ensure a transfer of effort on the reliefs of the first 18 channels when frames 1, 2 are stacked, especially when mounted tightly.

[0063] The structure is configured so that there is a plane orthogonal to the plane in which the frames extend, cutting at least one of the second channels 20 of the first frame 1 in the transverse direction and cutting a longitudinal portion of the seventh sealing cord 37 of the first frame 1, cutting in particular a longitudinal portion of the seventh sealing cord 37 of the second frame 2.

[0064] The structure is configured so that there is a plane orthogonal to the plane in which the frames extend, cutting at least one of the first channels 18 of the first frame 1 in the transverse direction and cutting a longitudinal portion of the second sealing cord 33 of the second frame 2 and cutting in particular a longitudinal portion of the fourth sealing cord 31 of the second frame 2.

[0065] The first frame 1, respectively the second frame 2, has an eighth sealing cord 38 provided on the distribution face 6, being configured to contain the first electrolyte, respectively the second electrolyte, in a central distribution zone 14 relative to a peripheral border 15 of the frame, when stacked in an electrolyzer 50 or in a redox battery.

[0066] The central distribution zone 14 encompasses both the inlet collector port 8; 9, the distribution cavity 16; 17, the evacuation cavity 17; 16, the central housing 10 and the outlet collector port 9; 8.

[0067] At least one of the first 31; 32, second 32; 31 and eighth 38 sealing cords is provided with grooves, in particular parallel to each other, projecting from the distribution face 6 and / or at least one of the third 33; 34, fourth 34; 33, fifth 35; 36, sixth 36; 35 and seventh 37 sealing cords is provided with a plurality of grooves, in particular parallel to each other, projecting from the support face 7.

[0068] At least one of the sealing cords 31-38 is configured so that one of its grooves is less high than another of its grooves, in particular arranged on the periphery of the cord.

[0069] At least one of the sealing cords 31-38 is configured so that one of its grooves has a profile distinct from another of its grooves.

[0070] A crest of at least one groove in the plurality of grooves has a height between 20 and 200 microns. Such grooves improve sealing against high pressures.

[0071] At least one of the sealing cords 31-38, in particular each sealing cord 31-38 has a raised band relative to the plane of the frame, in particular being continuous.

[0072] The reliefs forming the plurality of the first channels 18 or the second channels 20 have an overthickness arranged opposite at least one of the grooves of the support face 7.

[0073] Each frame is configured so that there is a plane orthogonal to the plane in which the frame extends, cutting the excess thickness of a relief forming the plurality of the first channels 18 or the second channels 20 and a vertex of one of the grooves made on the support face 7.

[0074] Figure 3 represents the first frame 1 and the second frame 2 of such a structure as described above, schematically and transparently. As can be seen in the transparency, the first frame 1 and second frame 2 are stacked and aligned as described above. With such a configuration of the frames of the structure: - a portion, in particular a longitudinal portion, of the seventh sealing bead 37 of the second frame 2 is aligned with at least part of the second channels 20 of the first frame 1 to ensure force transfer to the reliefs of the second channels 20 of the first frame 1 when the first frame 1 and second frame 2 are stacked, in particular when tightly mounted; and - a portion, in particular a longitudinal portion, of the second sealing cord 33 of the second frame 2 is aligned with at least a part of the first channels 18 of the first frame 1, to ensure a transfer of force onto the reliefs of the first channels 18 when the frames 1, 2 are stacked, in particular mounted tightly.

[0075] The first frame 1 and the second frame 2 are each in the form of the same mechanical part and are intended to be stacked so that the first frame 1 is rotated 180° relative to the second frame 2.

[0076] Figure 4 represents an electrolyzer 50 comprising a stack of a plurality of cells 40 and at least one bipolar plate 4 sandwiched between two cells 40. Each cell 40 comprises at least one structure as described above, a membrane 52 and two pores 3, the cell 40 being configured so that the membrane 52 is sandwiched between the two frames 1; 2, each of the pores 3 being disposed respectively in the central housing 10 of each frame 1, the cell 40 being configured so that each pores 3 is traversed, one, by the first electrolyte and the other, by the second electrolyte.

[0077] Fig. 4 is a cross-sectional view along axis AA of the structure of Fig. 3.

[0078] Fig. 5 represents a detail of the section of Fig. 4, at the level of circle C.

[0079] As seen in [Fig.5], a sealing film 51 is interposed between the bipolar plate 4 and the cell 40, on each side of the bipolar plate 4.

[0080] The electrolyzer 50 comprises a first collecting plate 53 at a first end of the stack and a second collecting plate 54 at a second end of the stack, for collecting an electric current.

[0081] Figures [Fig.6] and [Fig.7] describe embodiments of a structure as described above.

[0082] Figure 6 is a section along a plane orthogonal to the plane in which the first frame 1 extends. As can be seen in Figure 6, the orthogonal plane passes through one of the sealing beads 31-38 of one of the faces of the first frame 1. This orthogonal plane also passes through a first bead formed on the other face of the first frame 1. In the example of Figure 6, the first bead 61 belongs to another of the sealing beads 31-38 of the other face of the first frame 1.

[0083] This orthogonal plane also passes through a second bead 62 formed on one of the faces of the second frame 2 and through a third bead 63 formed on the other of the faces of the second frame 2.

[0084] Fig. 7 is a section along a plane orthogonal to the plane in which the first frame 1 extends. As can be seen in Fig. 7, the orthogonal plane passes through one of the sealing cords 31-38 of one of the faces of the first frame 1. This orthogonal plane also passes through a first bead 61 formed on the other of the faces of the first frame 1.

[0085] This orthogonal plane also passes through a second bead 62 formed on one of the faces of the second frame 2 and through a third bead 63 formed on the other of the faces of the second frame 2.

Claims

1. Demands Electrolyzer structure (50) or redox battery, comprising a first frame (1) and a second frame (2), intended to be stacked in an electrolyzer (50) or in a redox battery, each being provided with a distribution face (6) for the distribution of a first electrolyte, respectively a second electrolyte, and a support face (7), the first frame (1), respectively the second frame (2) comprising: - an inlet collector orifice (8; 9) passing through the frame, to bring the first electrolyte, respectively the second electrolyte, onto the distribution face (6), the inlet collector orifice (8; 9) being surrounded by a fifth sealing bead (35; 36) provided on the support face (7); - an outlet collector orifice (9; 8) passing through the frame to evacuate the first electrolyte, respectively the second electrolyte, from the distribution face (6), the outlet collector orifice (9; 8) being surrounded by a sixth sealing bead (36; 35) provided on the support face (7); - a central housing (10), in particular for receiving a porous (3), surrounded by a seventh sealing bead (37) provided on the support face (7); - a first light (11; 12) formed through the frame, for the passage of the second electrolyte, respectively of the first electrolyte, in a direction of a thickness of the frame and in a first direction of circulation, the first light (11; 12) being surrounded by a first sealing cord (31; 32) provided on the distribution face (6) and being surrounded by a third sealing cord (33; 34) provided on the support face (7); - a second light (12; 11) formed through the frame, for the passage of the second electrolyte, respectively of the first electrolyte, in the direction of the thickness of the frame (1) and in a second direction of circulation opposite to the first direction of circulation, the second light (12; 11) being surrounded by a second sealing cord (32; 31) provided on the distribution face (6) and being surrounded by a fourth sealing cord (34; 33) provided on the support face (7);

2.

3. - a distribution cavity (16; 17) provided on the distribution face (6), to allow the distribution of the first electrolyte, respectively of the second electrolyte, from the inlet collector orifice (8; 9) to the central housing (10); - an evacuation cavity (17; 16) provided on the distribution face (6), to allow the evacuation of the first electrolyte, respectively of the second electrolyte, from the central housing (10) to the outlet collector orifice (9; 8), the distribution cavity (16; 17), and in particular the evacuation cavity (17; 16), comprising a central distribution basin (19) fluidically connected, by a first end to a plurality of first channels (18) formed by reliefs and hollows and by a second end to a plurality of second channels (20) formed by reliefs and hollows; the first and second frames (1; 2) being stacked so that the bearing face (7) of the first frame (1) is oriented towards the bearing face (7) of the second frame (2) and being stacked so that the inlet collector orifice (8) of the first frame (1) is aligned with the second opening (11) of the second frame (2) and so that the outlet collector orifice (9) of the first frame (1) is aligned with the first opening (12) of the second frame (2), the structure being configured so that there exists a plane orthogonal to the plane in which the first frame (1) extends, intersecting one of the sealing beads (31-37) of one of the faces (6, 7) of the first frame (1), in particular by passing through a vertex of said sealing bead, said plane passing through a first bead formed on the other of the faces (7, 6) of the first frame (1), said plane passing through a second bead formed on one of the faces (6,7) of the second frame (2) and said plane passing through a third bead formed on the other of the faces (7, 6) of the second frame (2). Structure according to the preceding claim, the first (61), second (62) and third (63) ridges each have a raised portion, in particular projecting from a flat surface of the first frame (1) or the second frame (2). Structure according to any one of the preceding claims, at least one of the first bead (61), the second bead (62) and the third bead (63), forms a portion of one of the sealing cords (31-38), in particular a striation of one of the sealing cords (31-38).

4. Structure according to any one of the preceding claims, at least one of the first bead (61), second bead (62) and third bead (63), forms a relief of at least one of the plurality of the first channels (18) or second channels (20).

5. Structure according to the preceding claim, at least one of the first bead (61), second bead (62) and third bead (63), forms an overthickness of at least one of the reliefs forming the plurality of the first channels (18) or second channels (20).

6. Structure according to any one of the preceding claims, at least one of the first (31; 32) and second (32; 31) sealing cords being provided with grooves, in particular parallel to each other, projecting from the distribution face (6) and / or at least one of the third (33; 34), fourth (34; 33), fifth (35; 36), sixth (36; 35) and seventh (37) sealing cords being provided with a plurality of grooves, in particular parallel to each other, projecting from the support face (7).

7. Structure according to any one of the preceding claims, the first frame (1), respectively the second frame (2), comprises an eighth sealing cord (38) formed on the distribution face (6) being configured to contain the first electrolyte, respectively the second electrolyte, in a central distribution zone (14) relative to a peripheral border (15) of said frame, when stacked in an electrolyzer 50 or in a redox battery.

8. Structure according to the preceding claim, the structure being configured so that there is a plane orthogonal to the plane in which the first frame (1) extends, cutting the eighth sealing bead (38) of the first frame (1), in particular by passing through a vertex of said sealing bead, said plane passing through the first bead formed on the bearing face (7) of the first frame (1), said plane passing through the second bead, said plane passing through the third bead.

9. An electrolyzer or redox battery cell (40) comprising at least one structure according to any one of the preceding claims, a membrane (52) and two pores (3), the cell (40) being configured so that the membrane (52) is sandwiched between the two frames (1; 2), each of the porous (3) being disposed respectively in the central housing (10) of each frame (1), the cell (40) being configured so that each porous (3) is traversed, one, by the first electrolyte and the other, by the second electrolyte.

10. Electrolyzer (50) comprising a stack of a plurality of cells (40) according to the preceding claim and at least one bipolar plate (4) sandwiched between two cells (40).

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