Separator plate assembly for electrochemical systems and method of production thereof

Abstract

The invention relates to a separator plate assembly for an electrochemical system, comprising a first metal sheet and a second metal sheet. The first metal sheet has a first circumferential sealing structure for sealing an electrochemically active area, a first cut-out arranged outside the first circumferential sealing structure, and a first embossed structure arranged outside the first circumferential sealing structure. The second metal sheet has a second circumferential sealing structure, a second cut-out arranged outside the second circumferential sealing structure, and a second embossed structure arranged outside the second circumferential sealing structure. The second embossed structure is at least partially arranged in an area of the second metal sheet defined by a vertical projection of the first cut-out onto the second metal sheet, such that the second embossed structure is visible through the first cut-out. The first embossed structure is at least partially arranged in an area of the first metal sheet defined by a vertical projection of the second cut-out onto the first metal sheet, such that the first embossed structure is visible through the second cut-out.

Description

Technical Field

[0001] This document primarily relates to a separator assembly for use in an electrochemical system comprising a first metal sheet and a second metal sheet. This document also relates to a method for manufacturing such a separator assembly. Background Technology

[0002] Known electrochemical systems, such as fuel cell systems or electrochemical compressor systems, like electrolyzers, typically comprise stacked electrochemical cells, each separated from the others by metal separators. These separators are typically formed as bipolar plates. These separators or bipolar plates generally comprise two connected individual metal plates, which are typically welded together and are usually made of thin metal sheets. As a result, each separator or bipolar plate comprises a first metal sheet and a second metal sheet. The separator, or the individual plates forming the separator, can be used for, for example, electrical contact of electrodes in a single electrochemical cell (e.g., a fuel cell) and / or for electrical connection of adjacent cells (series connection of cells).

[0003] The separator, or the individual plate or sheet forming the separator, may include channel structures configured to supply one or more media to the battery and / or remove reaction products. For example, the media may be a fuel (e.g., hydrogen or methanol), a reactant gas (e.g., air or oxygen), or a coolant. Such channel structures are typically arranged within electrochemically active regions (gas distribution structures / flow fields). Furthermore, the separator, or the individual plate or sheet forming the separator, may be configured to transfer waste heat generated during the conversion of electrical or chemical energy in the electrochemical cell, and to seal different media and / or channels to each other and / or relative to the outside. The aforementioned channel and / or sealing structures, specifically sealing flanges, are typically embossed into the individual plate using an embossing tool. Similar structures are also present in separators for humidifiers used in electrochemical systems. Therefore, the following description also applies accordingly to separators for humidifiers. When the term "embossing" is used herein, it includes not only embossing in a narrower sense but also deep drawing and hydroforming.

[0004] It is known to provide one or more measuring structures for each individual plate or each partition plate. These are structures formed on or on the plate and detectable by means of optical sensors and pattern or image recognition software, used to establish a coordinate system aligned with the plate in a defined manner. This coordinate system is used, for example, to measure the plate, to automatically position the plate in a tool, or to measure structures imprinted on or applied to the plate. The tool used to position the plate in a defined manner by means of the measuring structure can be, for example, a connecting tool, a coating device, or a cutting device, and specifically a stamping or laser cutting device. Based on measurements relative to such measuring structures, processing steps can be performed in defined locations: for example, positioning of laser welds, positioning for partial coating screen printing, etc.

[0005] For example, a measurement structure of the type described herein is known from the prior art DE102012002053A1, and is referred to herein as a measurement feature. In a particular embodiment, the measurement feature according to DE102012002053A1 is a generally circular recess arranged in a protrusion on a plate. Such a circular recess can be easily located and its center determined using a known optical measurement system. An optical measurement system for locating this measurement structure includes, for example, a light source for illuminating the measurement structure and an image detector for recording an image of the plate having the measurement structure arranged on it, wherein the light source and the camera can be arranged on the same side of the plate (reflected light method).

[0006] DE202015102771U1 relates to a metal plate for an electrochemical system, including a measurement structure integrally formed with the plate. The measurement structure has at least two cuts in the plate and a first deformation portion of the plate, the first deformation portion being arranged between and partially defined by the cuts, wherein the cutting edges of the cuts, partially spaced apart from each other by the first deformation portion, form at least two windows in the plate. Furthermore, the measurement structure has at least one second deformation portion of the plate. The plate is deformed by the second deformation portion in a region of the plate adjacent to the windows, such that the windows allow light incident on the plate to pass through perpendicularly to the flat surface of the plate. To position the measurement structure, transmitted light must be used, wherein a light source and an image detector are arranged on different sides of the plate, such that light emitted by the light source passes through the windows in the plate substantially perpendicular to the flat surface of the plate and is detected by the image detector on the opposite side of the plate.

[0007] However, it has been found that using previously known measuring structures to determine the alignment of a plate with the measuring structure relative to another plate and / or relative to tools used for quality control purposes is time-consuming and therefore has an adverse impact on the efficiency and cost of the production process. Summary of the Invention

[0008] Therefore, the object of the present invention is to provide a separator assembly suitable for use in an electrochemical system, comprising a first metal sheet, a second metal sheet, and one or more measuring structures. The one or more measuring structures are designed to make it as easy and rapid as possible to detect misalignment of at least one metal sheet in as many manufacturing steps as possible, thereby initiating correction or discarding of the misalignment if necessary.

[0009] This objective is achieved by the isolation plate assembly for an electrochemical system according to claim 1 and the method according to the additional independent claims. Specific embodiments are described in the dependent claims.

[0010] An isolation plate assembly for an electrochemical system is proposed, comprising a first metal sheet and a second metal sheet, the first metal sheet and the second metal sheet being in contact with each other at least partially along their facing flat sides.

[0011] The first metal sheet has a first circumferential sealing structure for sealing the electrochemically active region, a first slit arranged on the outside of the first circumferential sealing structure, and a first imprinted structure arranged on the outside of the first circumferential sealing structure.

[0012] The second metal sheet has a second circumferential sealing structure for sealing the electrochemically active region, a second notch disposed on the outside of the second circumferential sealing structure, and a second embossed structure disposed on the outside of the second circumferential sealing structure.

[0013] The second embossed structure is at least partially disposed in the region of the second metal sheet defined by the vertical projection of the first cut onto the second metal sheet, such that the second embossed structure is visible through the first cut, and

[0014] The first embossed structure is at least partially arranged in the region of the first metal sheet defined by the vertical projection of the second cut onto the first metal sheet, such that the second embossed structure is visible through the second cut.

[0015] Since the first embossed structure is visible through the second notch, and the second embossed structure is visible through the first notch, the embossed structures can be detected from both sides of the separator assembly, for example, using an optical detector. Therefore, both structures can be detected simultaneously from both sides, or simultaneously from only one side. This significantly improves speed and accuracy, which allows for the determination of the alignment of at least one metal sheet in the tool, or the alignment of the metal sheets relative to each other.

[0016] Here, the embossed structure is particularly considered to be a structure extending transversely to a plane defined by one of the metal sheets, such as the inner or outer radius or the edge defining that radius.

[0017] The first and second metal sheets can be connected to each other, for example, through one or more substantially joined joints. As an example, the first and second metal sheets can be welded to each other, for example, through one or more weld joints, particularly through one or more laser weld joints. Specifically, before welding the two metal sheets to each other, the measuring structure can also be used to align the two metal sheets relative to each other.

[0018] The first circumferential sealing arrangement may be integrally formed with the first metal sheet. For example, the first circumferential sealing arrangement may be integrally formed in the first metal sheet as a sealing flange, for example, by embossing or deep drawing. However, the first circumferential sealing arrangement may also be designed as a different element from the first metal sheet, which is connected to the first metal sheet.

[0019] Accordingly, the second circumferential sealing arrangement can be integrally formed with the second metal sheet. For example, the second circumferential sealing arrangement can be integrally formed in the form of a sealing flange, for example, by embossing or deep drawing. However, the second non-circumferential sealing arrangement can also be designed as a different element from the second metal sheet, which is connected to the second metal sheet.

[0020] Unlike the corresponding metal sheet, such elements, and coatings applied only to a sealing arrangement integrally formed with the corresponding metal sheet, to a portion of the sealing arrangement, or to the sealing arrangement and to a spatially defined adjacent area, can be positioned with particular precision by means of the measuring structure described herein.

[0021] The first cut may include a through opening in the first metal sheet, and / or the second cut may include a through opening in the second metal sheet.

[0022] The first cut may extend to the outer edge of the first metal sheet such that the outer edge of the first metal sheet at least partially defines the first cut, and / or the second cut may extend to the outer edge of the second metal sheet such that the outer edge of the second metal sheet at least partially defines the second cut.

[0023] The first embossed structure may extend to the outer edge of the first metal sheet, and / or the second embossed structure may extend to the edge of the second metal sheet.

[0024] The first embossed structure may have at least one protrusion that is fully or at least partially oriented away from the direction of the second metal sheet, and / or the second embossed structure may have at least one protrusion that is fully or at least partially oriented away from the direction of the first metal sheet.

[0025] The first embossed structure may have at least one protrusion that is wholly or at least partially oriented toward the second metal sheet, and / or the second embossed structure may have at least one protrusion that is wholly or at least partially oriented toward the first metal sheet. Thus, the first embossed structure may, for example, protrude through the second cut, and / or the second embossed structure may protrude through the first cut.

[0026] In the region of the second metal sheet defined by the vertical projection of the first cut onto the second metal sheet, in addition to the second embossing structure, the second metal sheet may have a cut, preferably in the form of a through opening of the second metal sheet, and / or, in the region of the first metal sheet defined by the vertical projection of the second cut onto the first metal sheet, in addition to the first embossing structure, the first metal sheet may have a cut, preferably in the form of a through opening of the first metal sheet, so that the embossing structure and the cut can be arranged very close to each other.

[0027] The cut in the first metal sheet within the region defined by the vertical projection of the second cut onto the first metal sheet will hereinafter be referred to as the third cut. The cut in the second metal sheet within the region defined by the vertical projection of the first cut onto the second metal sheet will hereinafter be referred to as the fourth cut. The third cut and / or the fourth cut may each be designed, for example, as a through opening or notch in the respective metal sheet, such as a notch in the outer edge.

[0028] It may be advantageous if the cutting edge of the third cut is visible through the second cut, and / or the cutting edge of the fourth cut is visible through the first cut. Due to the dual structure arranged in this reciprocating manner, the cutting edges of the first embossed structure or the third cut, and / or the cutting edges of the second embossed structure or the fourth cut, can be optically inspected via the second metal sheet or via the first metal sheet, respectively.

[0029] For example, in some monitoring components, it may be desirable to be able to detect the embossed structure of the top metal sheet through the bottom metal sheet. For instance, during screen printing, for example, to apply a coating, it may be necessary, for space reasons, not to place the monitoring camera on the side of the board assembly where screen printing is taking place. This requirement can be achieved by providing a third and / or fourth notch.

[0030] In some embodiments, the third cut is formed at least partially or entirely within the first imprinted structure. Therefore, the first imprinted structure may, for example, at least partially or entirely surround the third cut. For example, it is conceivable that the centroid and / or center point of the third cut and the first imprinted structure overlap. The third cut and the first imprinted structure are sometimes arranged concentrically and / or symmetrically with respect to a common axis of symmetry and / or plane of symmetry.

[0031] As an alternative or addition, the fourth notch may be formed at least partially or entirely within the second imprinted structure. Therefore, the second imprinted structure may, for example, at least partially or entirely surround the fourth notch. Alternatively, the centroids or center points of the fourth notch and the second imprinted structure may overlap. The fourth notch and the second imprinted structure are sometimes arranged concentrically and / or symmetrically with respect to a common axis of symmetry and / or plane of symmetry.

[0032] The surface area of ​​the third and / or fourth cuts within the corresponding protrusions is typically smaller than the surface area of ​​the region enclosed by the associated embossed structure. The third and / or fourth cuts may have a geometry different from that of the associated embossed structure. For example, if the associated embossed structure is circular, the associated cuts may have a different shape. In some embodiments, the third and / or fourth cuts are each designed as slots (elongated holes). If both the third and fourth cuts are elliptical or slot (elongated hole) shapes, these cuts may, for example, be arranged in different orientations relative to each other. In alternative embodiments, the third cut and the first embossed structure have the same geometry. Sometimes, the fourth cut and the second embossed structure have the same geometry. It should be noted here that, in the context of this document, objects can have the same geometry even if they have different sizes (e.g., two circles of different sizes with the same shape). Accordingly, objects with different geometries can have the same size, such as the same surface area.

[0033] The vertical projection of the first cut on the plane defined by the first or second metal sheet and the vertical projection of the second cut on the same plane may at least partially overlap each other.

[0034] The first embossed structure may be symmetrical with respect to a first plane of symmetry or with respect to a first axis of symmetry, wherein the first plane of symmetry or the first axis of symmetry is oriented perpendicular to a first sheet plane defined by the first metal sheet, and / or, the second embossed structure may be symmetrical with respect to a second plane of symmetry or with respect to a second axis of symmetry, wherein the second plane of symmetry or the second axis of symmetry is oriented perpendicular to a second sheet plane defined by the second metal sheet.

[0035] The first embossed structure may have, for example, integer or continuous rotational symmetry with respect to the first axis of symmetry, and / or the second embossed structure may have, for example, integer or continuous rotational symmetry with respect to the second axis of symmetry.

[0036] Preferably, at least a portion of the corresponding axis of symmetry and / or plane of symmetry is visible through the corresponding cut, since the axis of symmetry and plane of symmetry form a preferred reference point and a preferred reference plane for relative measurement of the imprinted structure.

[0037] The first metal sheet may have one embossed structure extending around the first slit or multiple embossed structures arranged around the first slit, and / or the second metal sheet may have one embossed structure extending around the second slit or multiple embossed structures arranged around the second slit. In this case, "extending around" does not mean that the embossed structure must be completely surrounded by the slit, but that the embossed structure may be partially surrounded by the slit, for example, at a ratio of 2 / 3 or 3 / 4.

[0038] Furthermore, the first metal sheet may have another cutout and another embossed structure disposed on the outer side of the first circumferential sealing structure, and the second metal sheet may have another cutout and another embossed structure disposed on the outer side of the second circumferential sealing structure. Thus, the other embossed structure of the second metal sheet can be at least partially disposed in the region of the second metal sheet defined by the vertical projection of the other cutout of the first metal sheet onto the second metal sheet, such that the other embossed structure of the second metal sheet is visible through the other cutout of the first metal sheet. Similarly, the other embossed structure of the first metal sheet can be at least partially disposed in the region of the first metal sheet defined by the vertical projection of the other cutout of the second metal sheet onto the first metal sheet, such that the other embossed structure of the first metal sheet is visible through the other cutout of the second metal sheet.

[0039] Since the two embossed structures belong to the same component arranged in a plane, namely the first metal sheet, the position of the first metal sheet can be completely determined, for example, by positioning the two embossed structures of the first metal sheet through a cut in the second metal sheet. If the embossed structures are integrally formed in the relevant metal sheet in the same forming step as the web of the sealing flange and / or active region, then the position of the sealing flange and / or web of the active region of the relevant metal sheet can be determined by the second metal sheet based on the position of the two embossed structures. For example, this allows for the optimal application of a portion of the coating to the sealing flange or the active region. Alternatively, if only the sealing arrangement is applied, its application position relative to the embossed structures can be determined in the same manner. Therefore, the embossed structures and cuts make it possible to position the elements of the first metal sheet from the side of the separator where the second metal sheet is arranged, i.e., from the invisible side of the element itself of the separator. Conversely, this also applies to the embossed structures of the second metal sheet, whose position can be determined by the position of the two embossed structures of the second metal sheet, which can be detected by the cut in the first metal sheet.

[0040] The first and second metal sheets can each have a rectangular or substantially rectangular shape with a length and a width, wherein the width is less than or equal to the length in each case. Thus, the minimum distance between the first imprinted structure and another imprinted structure of the first metal sheet can be, for example, at least 80%, preferably at least 90%, of the width of the first metal sheet, and / or thus, the minimum distance between the second imprinted structure and another imprinted structure of the second metal sheet can be, for example, at least 80%, preferably at least 90%, of the width of the second metal sheet. Here, the width can be based on a maximum width, or solely on the total width of the metal sheets in the electrochemically active region.

[0041] Therefore, the first metal sheet and the second metal sheet can each have a rectangular or substantially rectangular shape with a length and a width, wherein the width is less than or equal to the length in each case, and thus the length is greater than or equal to the width in each case. Thus, the minimum distance between the first embossed structure and another embossed structure of the first metal sheet can be, for example, at least 80%, preferably at least 90%, of the length of the first metal sheet, and / or thus, the minimum distance between the second embossed structure and another embossed structure of the second metal sheet can be, for example, at least 80%, preferably at least 90%, of the length of the second metal sheet.

[0042] The centroid of the first embossed structure in the plane defined by the first or second metal sheet can be defined by the vertical projection of the first embossed structure onto the plane. The centroid of the second embossed structure in the plane can be defined by the vertical projection of the second embossed structure onto the plane. The centroid of another embossed structure of the first metal sheet in the plane can be defined by the vertical projection of the other embossed structure of the first metal sheet onto the plane. Furthermore, the centroid of another embossed structure of the second metal sheet in the plane can be defined by the vertical projection of the other embossed structure of the second metal sheet onto the plane. Specifically, the centroid coincides with the aforementioned axis of symmetry or plane of symmetry. Furthermore, a distance and a maximum tolerance value can be specified. Thus, the actual distance between the centroid of the first embossed structure and the centroid of the second embossed structure deviates from the specified distance by less than the specified maximum tolerance value, and thus, the actual distance between the centroid of the other embossed structure of the first metal sheet and the centroid of the other embossed structure of the second metal sheet deviates from the specified distance by less than the specified maximum tolerance value.

[0043] The first metal sheet may also have at least three spaced-apart cuts arranged outside the first circumferential sealing structure and at least three spaced-apart embossed structures arranged outside the first circumferential sealing structure. Similarly, the second metal sheet may also have at least three spaced-apart cuts arranged outside the second circumferential sealing structure and at least three spaced-apart embossed structures arranged outside the second circumferential sealing structure. Therefore, the metal sheets can be arranged and designed such that each of the at least three embossed structures of the second metal sheet is at least partially arranged in the region of the second metal sheet defined by the vertical projection of one of the at least three cuts of the first metal sheet onto the second metal sheet, so that in each case, at least one of the at least three embossed structures of the second metal sheet is visible through each of the at least three cuts of the first metal sheet, and each of the at least three embossed structures of the first metal sheet is at least partially arranged in the region of the first metal sheet defined by the vertical projection of one of the at least three cuts of the second metal sheet onto the first metal sheet, so that in each case, at least one of the at least three embossed structures of the first metal sheet is visible through each of the at least three cuts of the second metal sheet.

[0044] The steps of the method for producing the above-mentioned isolation plate assembly will be described below.

[0045] According to the first aspect, the method for producing such a partition assembly may include, for example, at least the following steps:

[0046] The first cut is punched out from the first metal sheet using the first tool.

[0047] In the second tool, the first embossing structure adjacent to the first cut is embossed into the first metal sheet.

[0048] The third tool punches a second cut from the second metal sheet.

[0049] In the fourth tool, the second embossing structure adjacent to the second cut is embossed into the second metal sheet, and

[0050] The first metal sheet and the second metal sheet are placed overlapping each other, so that...

[0051] The first metal sheet and the second metal sheet are in contact with each other at least partially along their facing flat sides, and

[0052] The first embossed structure of the first metal sheet is at least partially arranged in the region defined by the vertical projection of the second cut of the second metal sheet onto the first metal sheet, and

[0053] The second embossed structure of the second metal sheet is arranged at least partially in the area defined by the vertical projection of the first cut of the first metal sheet onto the second metal sheet.

[0054] According to the second aspect, the method for producing such a partition assembly may additionally include, for example, at least the following steps:

[0055] Another cut is punched out from the first metal sheet using the first tool.

[0056] In the second tool, another embossed structure adjacent to the other cut is embossed into the first metal sheet.

[0057] Another cut is punched out from the second metal sheet using the third tool.

[0058] In the fourth tool, another embossed structure adjacent to the other cut is embossed into the second metal sheet, and

[0059] The first metal sheet and the second metal sheet are placed overlapping each other, so that...

[0060] The first metal sheet and the second metal sheet are in contact with each other at least partially along their flat sides facing each other, and

[0061] Another embossed structure of the first metal sheet is at least partially arranged in the region defined by the vertical projection of another cut in the second metal sheet onto the first metal sheet, and the other embossed structure of the second metal sheet is at least partially arranged in the region defined by the vertical projection of the other cut in the first metal sheet onto the second metal sheet.

[0062] According to the third aspect, the method for producing such a partition assembly may additionally include, for example, at least the following steps:

[0063] The distance between a first reference point and a second reference point is detected non-contactly, wherein the first reference point is determined based on a first imprinted structure of a first metal sheet, and the second reference point is determined based on a second imprinted structure of a second metal point.

[0064] The distance between a third reference point and a fourth reference point is detected non-contactly, wherein the first reference point is determined based on another imprinted structure of the first metal sheet, and the fourth reference point is determined based on another imprinted structure of the second metal point.

[0065] If the deviation of the detected distance is not greater than the respective maximum distance, then the first metal sheet is connected to the second metal sheet.

[0066] According to the fourth aspect, as an alternative to the third aspect, but additional to the first and second aspects, this method for producing such a partition assembly may include, for example, at least the following steps:

[0067] At least one protruding edge is pressed into the first metal sheet using a second tool.

[0068] The distance between a first reference point and a second reference point is detected non-contactly, wherein the first reference point is determined based on a first imprint structure of a first metal sheet through a second cut in a second metal sheet, and wherein the second reference point is determined based on another imprint structure of the first metal sheet through another cut in the second metal sheet.

[0069] If the deviation of the distance detected above is not greater than the defined maximum distance, then the first metal sheet is coated on the surface opposite to the second metal sheet in the region of at least one convex edge.

[0070] In this method, the sealing arrangement, such as an applied sealing ridge or another sealing profile, can be applied, for example, by injection molding, instead of the imprinting of the coating and the ridge. This eliminates the imprinting of one or more ridges, but does not eliminate the imprinting of other structures.

[0071] According to the fifth aspect, as an alternative to the third and fourth aspects, but additional to the first and second aspects, this method for producing such a partition assembly may include, for example, at least the following steps:

[0072] In the second tool, the web of the active region is imprinted onto the first metal sheet.

[0073] The distance between a first reference point and a second reference point is detected non-contactly, wherein the first reference point is determined based on a first imprint structure of a first metal sheet through a second cut in a second metal sheet, and wherein the second reference point is determined based on another imprint structure of the first metal sheet through another cut in the second metal sheet.

[0074] If the deviation of the distance detected above is not greater than the defined maximum distance, then the first metal sheet is coated on the surface opposite to the second metal sheet in the web region of the active region.

[0075] If, in the method according to the third to fifth aspects, the detected distance is greater than the defined maximum distance, then at least one metal sheet is moved and one or more related distances are detected again non-contactly until the deviation is no greater than the respective defined maximum distance position.

[0076] Additional steps may include, for example, punching a third slit from a first metal sheet in a first tool, and / or, for example, punching a fourth slit from a second metal sheet in a third tool. The third slit may be punched from the first metal sheet simultaneously with the first slit. The fourth slit may be punched from the second metal sheet simultaneously with the second slit. Attached Figure Description

[0077] An embodiment of an electrochemical system including an isolation plate assembly of the type presented herein is illustrated in the accompanying drawings, and will be described in more detail below. In the accompanying drawings:

[0078] Figure 1 An electrochemical system comprising multiple separators or bipolar plates arranged in a stack is schematically shown in a three-dimensional view.

[0079] Figure 2 A three-dimensional diagram schematically illustrates... Figure 1 The system shown has two isolation plates, and a membrane electrode unit (membrane electrode assembly, MEA) is arranged between the isolation plates;

[0080] Figure 3 schematically illustrates the process according to... Figure 1 The system type shown is a cross-section of a system of stacked plates.

[0081] Figure 4 A plan view schematically illustrates an isolation panel assembly of the type presented herein;

[0082] Figure 5a It schematically shows the passage Figure 4 A detailed cross-section of the isolation plate assembly shown in the image;

[0083] Figure 5b The first plan view schematically illustrates the following based on Figure 5a Details;

[0084] Figure 5c The second plan view schematically illustrates the following based on Figure 5a Details;

[0085] Figure 6a The illustration shows a variation of Figure 4 Detailed cross-section of the isolation plate assembly;

[0086] Figure 6b The first plan view schematically illustrates the following based on Figure 6a Details;

[0087] Figure 6c The second plan view schematically illustrates the following based on Figure 6a Details;

[0088] Figure 7This schematically illustrates a variation based on another variant. Figure 4 Two perspective views showing details of the isolation panel assembly;

[0089] Figure 8a , 8b Each schematically illustrates a variation thereof. Figure 4 Two perspective views showing details of the isolation panel assembly;

[0090] Figure 8c It schematically shows the passage Figure 8a and 8b Detailed cross-section;

[0091] Figure 9-11 Each schematically illustrates a variation thereof. Figure 4 Two perspective views showing details of the isolation panel assembly;

[0092] Figure 12 A schematic diagram illustrating another variation is provided. Figure 4 Details of the isolation plate assembly;

[0093] Figure 13 A plan view of an isolation panel assembly of the type proposed herein according to another embodiment is shown schematically;

[0094] Figure 14 A plan view of an isolation panel assembly of the type proposed herein according to another embodiment is shown schematically;

[0095] Figure 15a A schematic plan view of a partition assembly of the type proposed herein according to another embodiment is shown, wherein the relative alignment of the two metal sheets of the partition assembly meets tolerance specifications;

[0096] Figure 15b schematically shown Figure 15a A plan view of the isolation plate assembly, in which the relative alignment of the metal sheets does not meet the tolerance specifications;

[0097] Figure 16a This schematically illustrates the method based on another variant. Figure 4 Detailed cross-section of the isolation plate assembly;

[0098] Figure 16b The first plan view schematically illustrates the following based on Figure 16a Details; and

[0099] Figure 16c The second plan view schematically illustrates the following based on Figure 16a Details. Detailed Implementation

[0100] Figure 1An electrochemical system 1 is shown, comprising multiple identical metal separators or bipolar plates 2 arranged in a stack along a z-direction 7. The stacked separators 2 are sandwiched between two end plates 3, 4. The z-direction 7 is also referred to as the stacking direction. In this example, system 1 is a fuel cell stack. Thus, in each case, two adjacent separators 2 in the stack enclose an electrochemical cell between them, which is used, for example, to convert chemical energy into electrical energy. To form the electrochemical cell of system 1, corresponding membrane electrode assemblies (MEAs) are arranged between the adjacent separators 2 in the stack (e.g., see...). Figure 2 MEAs typically contain at least one membrane, such as an electrolyte membrane. Additionally, a gas diffusion layer (GDL) may be disposed on one or both surfaces of the MEA.

[0101] In alternative embodiments, system 1 can also be designed as an electrolyzer, an electrochemical compressor, or a redox flow battery. Separators can also be used in these electrochemical systems. Thus, the composition of these separators can correspond to the composition of separator 2, which is explained in more detail herein, even though the medium guiding onto or through the separator may differ from the medium used in fuel cell systems, whether in the case of an electrolyzer, an electrochemical compressor, or a redox flow battery. This also applies to separators, particularly those in humidifiers.

[0102] The z-axis 7, together with the x-axis 8 and y-axis 9, forms a right-handed Cartesian coordinate system. In each case, the partition plate 2 defines a plate plane, wherein the plate planes of the partition plate are each aligned parallel to the xy plane and therefore perpendicular to the stacking direction or the z-axis 7. The end plate 4 includes a plurality of media connections 5 through which media can be supplied to and discharged from the system 1. These media that can be supplied to and discharged from the system 1 may include, for example, fuels such as molecular hydrogen or methanol, reaction gases such as air or oxygen, reaction products such as water vapor, or waste fuels or coolants such as water and / or ethylene glycol.

[0103] Figure 2 It shows Figure 1 A perspective view of two adjacent separator plates or bipolar plates 2 of an electrochemical system of type 1, and a membrane electrode assembly (MEA) 10 known in the prior art arranged between these adjacent separator plates 2, wherein, Figure 2 MEA 10 is largely obscured by the observer-facing isolation plate 2. Repeating features are indicated by the same reference numerals in different figures, both here and below. Isolation plate 2 is formed by two integrally connected separate plates 2a, 2b (see, for example, Figure 3), wherein only the first separate plate 2a facing the observer is... Figure 2 As can be seen, plate 2a obscures the second separate plate 2b. The separate plates 2a and 2b can be made of metal sheets such as stainless steel. For example, the separate plates 2a and 2b can be welded together by laser welding.

[0104] Individual plates 2a and 2b have mutually aligned through openings, which form through openings 11a-c of the partition plate 2. When multiple partition plates of the same type as partition plate 2 are stacked, the through openings 11a-c form conduits extending through the stack 2 in the stacking direction 7 (see...). Figure 1 Typically, each conduit formed by through openings 11a-c is fluidly connected to one of the ports 5 in the end plate 4 of system 1. For example, coolant can be introduced into or removed from the stack via the conduit formed by through opening 11a. On the other hand, the conduits formed by through openings 11b, 11c can be designed to supply fuel and reaction gases to the electrochemical cells of the fuel cell stack of system 1, and to remove reaction products from the stack.

[0105] To seal the through openings 11a-c relative to the respective individual plates or other areas of the electrochemical cell adjacent to them, and relative to the surrounding environment, each of the first individual plates 2a has a sealing arrangement 12a-12c in the form of sealing beads. These sealing beads are arranged around the through openings 11a-c, and in every case always around the through openings 11a-c, and are always provided with a coating 14a-c on their end faces, which improves the micro-sealing effect. On the opposite side of the separator 2... Figure 2 On the rear side of the observer, the second separate plate 2b has corresponding sealing flanges (not shown) for sealing the through openings 11a-c.

[0106] In the electrochemically active region 18, the first individual plate 2a is on its facing side Figure 2 A flow field 17 is included at the front side of the observer, which includes structures for guiding the reaction medium along the front side of a separate plate 2a. Figure 2 In this process, these structures are defined by multiple webs and channels extending between and defined by the webs. Typically, at least the end faces of these webs are provided with a coating to improve conductivity. This is preferably applied in a process step separate from the forming step. Here, it is preferable that the coating is applied as precisely as possible, i.e., without any offset or with only minimal offset relative to the imprinted shape of the webs, especially considering the typically very high cost of the coating. This allows operation to be carried out with minimal possible over-coating, i.e., with lateral suspension.

[0107] Facing the isolation plate 2 Figure 2On the observer's front side, the first individual plate 2a further comprises a dispensing or collecting region 20. The dispensing or collecting region 20 includes a structure configured to dispense and / or collect or aggregate media flowing from the active region 18 across the active region 18 from the first of the two through openings 11b toward the second through opening 11b. Similarly, Figure 2 The distribution structure of the distribution or collection area 20 is provided by the web and the channels extending between the webs and defined by the web. Figure 2 The corresponding transition region 21, aligned parallel to the y-direction 9, is located at the transition between the distribution and collection region 20 and the flow field 17 of the active region 18, on both sides of the flow field 17. In the transition region 21, for example, the medium guiding structure in each case has a reduced height compared to the adjacent regions 18, 20 (see Figure 3).

[0108] Each of the first individual plates 2a also has another sealing arrangement in the form of a circumferential flange 12d, which extends around the flow field 17 of the active region 18, the distribution or collection region 20, and the through openings 11b, 11c, and seals them relative to the through opening 11a, i.e., relative to the coolant circuit and relative to the surrounding environment of the system 1. The circumferential flanges are all provided with a coating 14d near their end faces, which improves the micro-sealing effect. Each of the second individual plates 2b includes a corresponding circumferential flange. The structure of the active region 18, the distribution structure of the distribution or collection region 20, and the sealing flanges 12a-d are each integrally formed with the individual plates 2a, and are integrally formed with the individual plates 2a, for example, during an embossing or deep drawing process. This also applies to the sealing flanges and corresponding distribution structures of the second individual plates 2b. The individual plates 2a, 2b have predominantly unstructured outer edge regions 22a, 22b outside the area enclosed by the peripheral flanges 12d.

[0109] Typically, at least the end faces of these sealing protrusions (including circumferential protrusions), i.e., the end faces of protrusions 12a to 12d, are provided with a polymer-based coating to improve the micro-sealing effect. This is preferably applied in a process step separate from the molding step. Preferably, the micro-sealing is applied as precisely as possible, i.e., with no offset or only minimal offset relative to the imprinted shape of the sealing protrusion.

[0110] The lines passing through the plate stack of system 1 formed by the two through openings 11b or by the through openings 11b are respectively via the passage 13b in the sealing flange 12b, via the distribution structure of the distribution or collection area 20, and via the facing Figure 2The flow field 17 in the active region 18 of the first individual plate 2a of the observer is fluidly connected to each other. Similarly, the channels formed by the two through openings 11c or by the through openings 11c formed by the stack of plates through the system 1 are respectively via corresponding convex edge passages, via corresponding distribution structures, and via opposing paths. Figure 2 The observer is fluidly connected to each other via corresponding flow fields on the outer side of the second individual plate 2b. Conversely, for example, through openings 11a or channels formed by through openings 11a of the stack of plates through system 1 are fluidly connected to each other via cavities 19 enclosed or surrounded by individual plates 2a, 2b. The cavities 19 are used to guide coolant through the isolation plates 2, and specifically for cooling the electrochemically active regions 18 of the isolation plates 2.

[0111] Figure 3 schematically shows the crossing Figure 1 A cross-sectional view of the plate stack of system 1, wherein the cutting plane is oriented in the z-direction and therefore perpendicular to the plate plane of the partition plate 2; for example, the cutting plane may be along... Figure 2 The bent section AA extends in the middle. The stacked identical partition plates 2 each include a first metal separate plate 2a as described above and a second metal separate plate 2b as described above. The active region 18, transition region 21, and distribution or collection region 20 of the partition plate 2 are also marked, wherein regions 18, 21, and 20 each have a structure for conducting the medium along the outer surface of the partition plate 2, which in particular in each case is in the form of a web and a channel defined by the web. In the active region 18, the web is provided with a coating 28 on its surface to improve conductivity, which is applied only to the surface of the web as much as possible, and not to the inclined channel walls or even the bottom of the channel, as shown in this example. Channels 29 on the distant surfaces of adjacent individual plates 2a, 2b and cooling channels 19 between adjacent individual plates 2a, 2b are also shown in the active region 18. Similarly, channels 29', 19' are shown in the transition region 21, and channels 29", 19" are shown in the distribution or collection region 20. Between cooling channels 19, 19', 19" two separate plates 2a, 2b are positioned on top of each other in contact area 24 and are joined together there, in this example, by laser welding seam 23.

[0112] Prior art membrane electrode assemblies (MEAs) 10 are arranged between stacked adjacent separators 2. Each MEA 10 includes: a membrane 14, such as an electrolyte membrane; and an edge segment 15 connected to the membrane 14, which is here composed of two edge seals 15a, 15b. For example, the edge segment 15 or the edge seals 15a, 15b may each be integrally connected to the membrane 14 by, for example, an adhesive or lamination. The edge segment 15 is formed of a thin film material, for example, a thermoplastic thin film material or a thermosetting thin film material.

[0113] In each case, the membrane 14 of MEA 10 extends at least across the active region 18 of the adjacent separator 2, in which proton transfer is possible via or through the membrane 14. Furthermore, the membrane 14 extends at least partially into the transition region 21, but not into the dispensing or collection region 20. In each case, the edge segment 15 of MEA 10 is used to position, attach, and seal the membrane 14 between adjacent separators 2. When the separators 2 of system 1 are clamped between end plates 3 and 4 in the stacking direction (see...), Figure 1 For example, the edge segment 15 of MEA 10 can be pressed between the sealing protrusions 12a-d of the corresponding adjacent separator 2 and / or at least between the circumferential protrusions 12d of the adjacent separator 2, thereby fixing the membrane 14 between the adjacent separators 2 in this way.

[0114] Edge segment 15 covers the corresponding distribution or collection area 20 of the adjacent isolation plate 2. Additionally, as shown in FIG3, edge segment 15 may also completely or at least partially cover the transition area 21 of the adjacent isolation plate 2, or extend completely or at least partially into the transition area 21 of the adjacent isolation plate 2 (see Figure 3). Figure 2 The edge segment 15 may also extend outward beyond the circumferential convex edge 12d, where the edge segment 15 may abut the outer edge region 22 of the individual plates 2a, 2b.

[0115] Additionally, as shown in FIG3, a gas diffusion layer 16 may be disposed in the active region 18. The gas diffusion layer 16 allows the incident flow of membrane 14 to cross as large an area as possible across the surface of membrane 14, and thus can improve proton transfer via membrane 14. For example, the gas diffusion layer 16 may be disposed on both sides of membrane 14 in the active region 18 between adjacent separators 2. The gas diffusion layer 16 may be formed of, for example, a nonwoven fabric or may include a nonwoven fabric.

[0116] In the cross-section of the exemplary embodiment shown in Figure 3, the two metal sheets 2a, 2b are optimally positioned on top of each other. On the one hand, this results in the maximum possible load-bearing capacity on their end faces 27a, 27b of the active region 18, making particularly easy and durable welding possible. On the other hand, this creates the shape of the cooling channel 19. If the end faces 27a, 27b were displaced relative to each other, it would likely make welding the metal sheets 2a, 2b to each other more difficult, and the coolant would flow differently, thus resulting in poor cooling in some cases.

[0117] Figure 4 A plan view schematically illustrates a partition assembly 100 of the type presented herein. The partition assembly 100 is designed for use with... Figure 1 The same type of electrochemical system as the electrochemical system 1 shown is used in system 1. In system 1, a separator assembly of the same type as separator assembly 100 can be used, for example, in each case. Figure 1 -3 shows the isolation plate or bipolar plate 2.

[0118] and Figure 1 The isolation plate or bipolar plate 2 shown in -3 is similar. Figure 4 The illustrated separator assembly 100 includes, in each case, a first metal sheet 100a and a second metal sheet 100b. The metal sheets 100a and 100b are parallel to each other and oriented parallel to the xy-plane. Figure 4 In the plan view, the second metal sheet 100b is almost completely obscured by the first metal sheet 100a facing the observer. The metal sheets 100a and 100b are at least partially in contact with each other along their flat, facing sides. Figure 1 The individual plates 2a and 2b of the partition plate 2 shown in Figure -3 are similar, and the metal sheets 100a and 100b of the partition plate assembly are typically connected to each other, for example, via substantially joined joints. As an example, the metal sheets 100a and 100b may be welded to each other, for example, via one or more laser welding joints.

[0119] Metal sheets 100a and 100b can have Figure 1 -3 is shown and has been referenced. Figure 1 -3 describes all, at least some, or one of the features of the individual plates 2a, 2b of the isolation plate or bipolar plate 2. Only for clarity, in Figure 4 Only some of these features are highlighted by reference numerals in the accompanying drawings. Figure 1 Similar to the individual plates 2a and 2b shown in -3, facing... Figure 4The metal sheet 100a of the observer includes, in particular, an electrochemically active region 18 having a structure for guiding the reaction medium along the front side of the metal sheet 100a, the structure here taking the form of a web and a channel disposed between the web; through openings 11a-c; sealing arrangements 12a-d, here taking the form of sealing flanges integrally formed in the metal sheet 100a; and passages 13a, 13b through the sealing arrangements 12a, 12b. In an alternative embodiment, the sealing arrangements 12a-d of the metal sheet 100a may also be defined by elements different from and connected to the metal sheet 100a. The sealing arrangements 12d extend around the active region 18 and are used to seal the active region 18, particularly relative to the surrounding environment and relative to other areas of the electrochemical system 1. A second metal sheet 100b, which in Figure 4 The middle is basically covered by the first metal sheet 100a and can have features corresponding to the features of the first metal sheet 100a, but has a passage 13c through the protrusion 12c instead of a passage 13b through the protrusion 12b. In particular, the second metal sheet 100b can therefore also have an electrochemically active region corresponding to the electrochemically active region 18, a through opening corresponding to the through opening 11a-c, a sealing protrusion corresponding to the sealing protrusion 11a-c, and an edge protrusion 12d having a coating 14a-d also applied to its end face.

[0120] Figure 4 The isolation panel assembly 100 shown is Figure 1 The difference between the known separator 2 shown in -3 is that the first metal sheet 100a additionally has cutouts 30a and 31a and embossed structures 32a and 33a imprinted into the first metal sheet 100a, each arranged on the outside of the sealing arrangement 12d extending around the electrochemically active region 18, that is, on the side of the sealing arrangement 12d away from the active region 18. The cutouts 30a and 31a of the first metal sheet 100a are designed as through openings in the first metal sheet 100a, and each is spaced a certain distance from the outer edge 25a of the first metal sheet 100a. The second metal sheet 100b has cutouts 30b and 31b, which correspond to the cutouts 30a and 31a of the first metal sheet 100a, and in Figure 4 The first metal sheet 100a is used to conceal the second metal sheet 100b, and the embossed structures 32b and 33b correspond to the embossed structures 32a and 33a of the first metal sheet 100a and are visible through the cutouts 30a and 31a. These structures are also arranged on the outer side of the peripheral sealing arrangement (circumferential sealing arrangement) used to seal the electrochemically active region of the second metal sheet 100b. Similar to the cutouts 30a and 31a of the first metal sheet 100a, Figure 4The cutouts 30b and 31b of the shielded second metal sheet 100b are designed as through openings in the second metal sheet 100b, and are each located at a certain distance from the outer edge of the second metal sheet 100b.

[0121] Figure 5a -c schematically shows Figure 4 The details of the partition assembly 100 shown include a cut 30a and an embossed structure 32a in a first metal sheet 100a, and a cut 30b and an embossed structure 32b in a second metal sheet 100b. Figure 5a Details are shown in a sectional view, where the cutting plane is oriented along the yz axis and along... Figure 4 , 5b Extend the section line 26 shown in 5c. Figure 5b The details are shown in a planar view, with the viewing direction pointing in the negative z-direction 7. And... Figure 5c The details are shown in another planar view, with the viewing direction pointing towards the positive z-direction 7, therefore in relation to Figure 5b The direction of observation is opposite to that of the direction of observation.

[0122] from Figure 5a and 5b It can be seen that the cut 30a of the first metal sheet 100a and the embossed structure 32b of the second metal sheet 100b are arranged and designed such that the embossed structure 32b is located in the region of the second metal sheet 100b defined by the vertical projection of the cut 30a of the first metal sheet 100a onto the second metal sheet 100b, so that when viewed in the negative z-direction 7, the embossed structure 32b of the second metal sheet 100b is visible through the cut 31a of the first metal sheet 100a. Similarly, from Figure 5a and 5c It can be seen that the cut 30b of the second metal sheet 100b and the embossed structure 32a of the first metal sheet 100a are arranged and designed such that the embossed structure 32a is arranged in the area of ​​the first metal sheet 100a defined by the vertical projection of the cut 30b of the second metal sheet 100b onto the first metal sheet 100a, so that when viewed in the positive z direction 7, the embossed structure 32a of the first metal sheet 100a is visible through the cut 31b of the second metal sheet 100b.

[0123] The cut 30a of the first metal sheet 100a is projected vertically onto the second metal sheet 100b along the negative z-direction 7, and therefore along a direction perpendicular to the second metal sheet 100b or perpendicular to the plane defined by the second metal sheet 100b. This direction may be defined, for example, by an undeformed or unembossed flat region 22b of the second metal sheet 100b, and is oriented parallel to the xy-plane. Similarly, the cut 30b of the second metal sheet 100b is projected vertically onto the first metal sheet 100a along the positive z-direction 7, and therefore along a direction perpendicular to the first metal sheet 100a or perpendicular to the plane defined by the first metal sheet 100a. This direction may be defined, for example, by an undeformed or unembossed flat region 22a of the first metal sheet 100a, and is oriented parallel to the xy-plane.

[0124] The cut 30a of the first metal sheet 100a is defined and demarcated by a circular edge 33a, forming a circular through opening or circular via in the first metal sheet 100a. The embossed structure 32b of the second metal sheet 100b, visible through the cut 30a, also has a circular shape. The embossed structure 32b of the second metal sheet 100b includes a protrusion pointing away from the first metal sheet 100a. Specifically, the embossed structure 32b includes an annular side surface 34b and a circular flat platform 35b bounded by the annular side surface 34b. The cut 30a and the embossed structure 32b are arranged concentrically and symmetrically with respect to a common axis of symmetry 36 perpendicular to the parallel metal sheets 100a and 100b. Specifically, the cut 30a and the embossed structure 32b have continuous rotational symmetry with respect to the axis of symmetry 36. The diameter of the embossed structure 32b of the second metal sheet 100b is smaller than the diameter of the cut 30a of the first metal sheet 100a. The circular embossed structure 32b is fully visible through the cut 30a.

[0125] The cut 30b of the second metal sheet 100b is defined and demarcated by a circular edge 33b, such that the cut 30b forms a circular through opening or circular via in the second metal sheet 100b. The embossed structure 32a of the first metal sheet 100a, visible through the cut 30b, also has a circular shape. The embossed structure 32a of the first metal sheet 100a includes a protrusion pointing away from the second metal sheet 100b. Specifically, the embossed structure 32a includes an annular side surface 34a and a circular flat platform 35a bounded by the annular side surface 34a. The cut 30b and the embossed structure 32a are arranged concentrically and symmetrically with respect to a common axis of symmetry 37 perpendicular to the parallel metal sheets 100a and 100b. In particular, the cut 30b and the embossed structure 32a have continuous rotational symmetry with respect to the axis of symmetry 37. The diameter of the embossed structure 32a of the first metal sheet 100a is smaller than the diameter of the cut 30b of the second metal sheet 100b. The circular embossed structure 32a is fully visible through the cut 30b.

[0126] exist Figure 4 , 5a In the partition plate assembly 100 shown in -c, the maximum diameter of the cuts 30a and 30b is less than the maximum diameter of the smallest through opening among the through openings 11a-c in each case. As an example, the maximum diameter of the cuts 30a and 30b is less than half or one-third of the maximum diameter of the smallest through opening among the through openings 11a-c in each case. Furthermore, the minimum distance between the cut 30a and the center point or centroid 36, 37 of the embossed structure 32a of the first metal sheet 100a is less than three times or less than 2.5 times the maximum diameter of the cut 30a, and the minimum distance between the cut 30b and the center point or centroid 36, 37 of the embossed structure 32b of the second metal sheet 100b is less than three times or less than 2.5 times the maximum diameter of the cut 30b. Figure 4 and 5a In the embodiment shown in -c, the notches 30a, 30b and the embossing structures 32a, 32b are identical in each case, and have the same geometry and dimensions in each case. In alternative embodiments, the notches 30a, 30b and the embossing structures 32a, 32b may differ in each case.

[0127] exist Figure 4 , 5a In the partition plate assembly 100 shown in -c, a notch 30a and an embossed structure 32a on one side, and a notch 31a and an embossed structure 33a on the other side, are arranged at opposite corners of a generally rectangular metal sheet 100a; and a notch 30b and an embossed structure 32b on one side, and a notch 31b and an embossed structure 33b on the other side, are arranged at opposite corners of a generally rectangular metal sheet 100b.

[0128] The first metal sheet 100a has a cut 31a, in Figure 4 The cutout 31b of the second metal sheet 100b, which is covered by the first metal sheet 100a, and the embossed structures 33a and 33b of the metal sheets 100a and 100b, can be designed and arranged in a manner completely similar to the aforementioned cutouts 30a and 30b and embossed structures 32a and 32b of the metal sheets 100a and 100b. For example, cutout 30a and embossed structure 32a can be transitioned to cutout 31a and embossed structure 33a by rotating 180 degrees about a rotation axis perpendicular to the intersection of the surface diagonals of the metal sheet 100a, and vice versa. Similarly, cutout 30b and embossed structure 32b can be transitioned to cutout 31b and embossed structure 33b by rotating 180 degrees about a rotation axis perpendicular to the intersection of the surface diagonals of the metal sheet 100b, and vice versa.

[0129] The distance between the cuts 30a and 31a of the first metal sheet 100a is at least twice the width of the first metal sheet 100a as defined in the surface plane (i.e., in the xy plane). Similarly, the distance between the embossed structures of the first metal sheet 100a is at least twice the width of the first metal sheet 100a as defined in the surface plane (i.e., in the xy plane). Furthermore, the distance between the embossed structures 32a and 33a of the first metal sheet 100a is at least 90% of the length of the first metal sheet 100a as defined in the surface plane (i.e., in the xy plane). This also applies to the distance between the cuts 30b and 31b of the second metal sheet 100b and the distance between the embossed structures 32b and 33b of the second metal sheet 100b.

[0130] For example, the large distance between the embossed structures 32a and 33a of the first metal sheet 100a and between the embossed structures 32b and 33b of the second metal sheet 100b makes it particularly easy to emboss from only one surface, i.e. Figure 4 The surface facing the observer detects incorrect positioning of the first metal sheet 100a relative to the second metal sheet 100b, for example, before the two metal sheets 100a and 100b are joined together by welding.

[0131] Figure 6a -c schematically shows Figure 4 and 5a -c is a variation of the above details of the isolation plate assembly 100. Figure 6a The variant shown in -c and Figure 4 and 5a The difference shown by -c is that, Figure 6aIn the variant shown in -c, the embossed structure 32b of the second metal sheet 100b has a shape resembling a triangle with rounded corners and partially spherical edges in the plan view. Figure 6a In -c, the embossed structure 32b of the second metal sheet 100b is symmetrical with respect to the symmetry plane 38, which is perpendicular to the orientation of the metal sheet 100b. Therefore, in Figure 6a In the variant shown in -c, the embossing structures 32a and 32b of the two metal sheets 100a and 100b are different.

[0132] Figure 7 schematically shown Figure 4 and 5a Two perspective views of other variations of the above-described details of the isolation plate assembly 100 shown in -c. Figure 7 The upper view of the two views shown illustrates details along the viewing direction toward the first metal sheet 100a, where the second metal sheet 100b is largely obscured by the first metal sheet 100a, such that the embossed structure 32b of the second metal sheet 100b is visible only through the cutout 30a of the first metal sheet 100a. Conversely, Figure 7 The lower view of the two views shown illustrates details along the viewing direction toward the second metal sheet 100b, where the first metal sheet 100a is largely obscured by the second metal sheet 100b, such that the embossed structure 32a of the first metal sheet 100a is visible only through the cutout 30b of the second metal sheet 100b.

[0133] Figure 7 The variation shown differs from the above embodiment in that the embossing structure 32a of the first metal sheet 100a extends far beyond the cut 30a of the first metal sheet 100a, such that the embossing structure 32a includes a deformation of the edge 33a of the first metal sheet 100a defining the cut 30a. Similarly, the embossing structure 32b of the second metal sheet 100b extends far beyond the cut 30b of the second metal sheet 100b, such that the embossing structure 32b includes a deformation of the edge 33b of the second metal sheet 100b defining the cut 30b. Furthermore, Figure 7 The embossed structures 32a and 32b shown in each case do not have a flat shape, but rather a bump-shaped or dome-shaped shape, wherein each bump or dome is partially cut off at the edges 33a and 33b that define the cuts 30a and 30b.

[0134] The embossed structure 32a of the first metal sheet 100a is fully visible through the cut 30b of the second metal sheet 100b, and the embossed structure 32b of the second metal sheet 100b is fully visible through the cut 30a of the first metal sheet 100a. Furthermore, the cuts 30a and 30b of the metal sheets 100a and 100b are designed and arranged such that the vertical projection of the cut 30a of the first metal sheet 100a onto the plane defined by the first or second metal sheet 100b in the aforementioned sense at least partially overlaps with the vertical projection of the cut 30b of the second metal sheet 100b onto the same plane. Here, the plane is, for example, again oriented parallel to the unembossed flat regions 22a and 22b of the metal sheets 100a and 100b, and therefore parallel to the xy plane. Therefore, a portion of the edge 33b defining the cut 30b of the second metal sheet 100b is visible through the cut 30a of the first metal sheet 100a, and a portion of the edge 33a defining the cut 30a of the first metal sheet 100a is visible through the cut 30b of the second metal sheet 100b.

[0135] Figure 8a schematically shown Figure 4 and 5a Two perspective views of other variations of the above-described details of the isolation plate assembly 100 shown in -c. Here, Figure 8a The upper view of the two views shown illustrates the relationship between... Figure 7 The details in the lower view corresponding to the viewing direction, and, Figure 8a The lower view of the two views shown illustrates the relationship between... Figure 7 Details corresponding to the viewing direction in the top view.

[0136] Figure 8a The variations shown are Figure 4 and 5aThe difference in detail shown in -c10 is that the embossed structure 32a of the first metal sheet 100a has a protrusion pointing towards the second metal sheet 100b, and the embossed structure 32b of the second metal sheet 100b has a protrusion pointing towards the first metal sheet 100b. The embossed structure 32a of the first metal sheet 100a protrudes through the cut 30b of the second metal sheet 100b. Specifically, the embossed structure 32a of the first metal sheet 100a protrudes beyond the surface of the second metal sheet 100b facing away from the first metal sheet 100a, or beyond the edge 33b defining the cut 30b of the second metal sheet 100b. Similarly, the embossed structure 32b of the second metal sheet 100b protrudes through the cut 30a of the first metal sheet 100a. In particular, the embossed structure 32b of the second metal sheet 100b protrudes beyond the surface of the first metal sheet 100a that is away from the second metal sheet 100b, or beyond the edge 33a that defines the cut 30a of the first metal sheet 100a.

[0137] Figure 8b schematically shown Figure 4 and 5a Two perspective views of other variations of the above-described details of the isolation plate assembly 100 shown in -c. Here, Figure 8b The upper view of the two views shown illustrates the relationship between... Figure 8a The details in the upper view corresponding to the viewing direction, and, Figure 8b The lower view of the two views shown illustrates the relationship between... Figure 8a Details corresponding to the viewing direction in the lower view.

[0138] Figure 8b The variations shown are Figure 8a The difference shown in the variant is that, Figure 8b In the variant shown, the cuts 30a and 30b of the metal sheets 100a and 100b extend to the outer edges 25a and 25b of the respective metal sheets 100a and 100b, respectively, such that the cuts 30a and 30b are not designed as through openings as in the previous embodiment, but rather as notches in the outer edges 25a and 25b. Figure 8b In the process, cutouts 30a and 30b each have a semi-circular shape, and embossed structures 32a and 32b each extend to the outer edges 25a and 25b of the corresponding metal sheets 100a and 100b, and have a semi-protrusion or semi-domed shape. The cutouts 30a and 30b and the embossed structures 32a and 32b are therefore respectively perpendicular to the metal sheets 100a and 100b, that is, in... Figure 8bTwo possible symmetric planes perpendicular to the xy plane are arranged symmetrically. One of these symmetric planes is oriented parallel to the xz plane, while the other is oriented parallel to the yz plane.

[0139] Figure 8c The cross-sectional view shows the results according to Figure 8a , 8b A variation thereof, wherein the cutting plane is oriented parallel to the yz plane, and in Figure 8a , 8b In each case, it is represented by the cutting line 26. Figure 8c The joining (protrusion) of the embossed structure 32a of the first metal sheet 100a through the cut 30b of the second metal sheet 100b is clearly shown, as is the joining (protrusion) of the embossed structure 32b of the second metal sheet 100b through the cut 30a of the first metal sheet 100a.

[0140] Figure 9 schematically shown Figure 4 and 5a Two perspective views of other variations of the above-described details of the isolation plate assembly 100 shown in -c. Here, Figure 9 The upper view of the two views shown illustrates the relationship between... Figure 8b The details in the upper view corresponding to the viewing direction, and, Figure 9 The lower view of the two views shown illustrates the relationship between... Figure 8b Details corresponding to the viewing direction in the lower view.

[0141] Figure 9 The variations shown are Figure 8b The difference in the variant shown is that the embossed structures 32a and 32b are each spaced a certain distance from the outer edges 25a and 25b of the corresponding metal sheets 100a and 100b, and each has a circular shape. Therefore, Figure 9 The modified embossed structures 32a and 32b shown each possess continuous rotational symmetry with respect to the axes of symmetry perpendicular to the metal sheets 100a and 100b. Therefore, in Figure 9 In this context, these axes of symmetry are each parallel to the z-axis and oriented 7.

[0142] Figure 10 schematically shown Figure 4 and 5a Two perspective views of other variations of the above-described details of the isolation plate assembly 100 shown in -c. Here, Figure 10 The upper view of the two views shown illustrates the relationship between... Figure 9 The details in the upper view corresponding to the viewing direction, and, Figure 10The lower view of the two views shown illustrates the relationship between... Figure 9 Details corresponding to the viewing direction in the lower view.

[0143] Figure 10 The variations shown are Figure 9 The variation shown differs in that the outer edge 25a of the first metal sheet 100a has a raised embossed portion pointing away from the second metal sheet 100b, and includes embossed structures 32a and 39a, the embossed structure 39a extending around the cut 30a and including the edge 33a of the cut 30a. Correspondingly, the outer edge 25b of the second metal sheet 100b has a raised embossed portion pointing away from the first metal sheet 100a, and includes embossed structures 32b and 39b, the embossed structure 39b extending around the cut 30b and including the edge 33b of the cut 30b.

[0144] As in Figure 8b and 9 In the variant shown, the cuts 30a and 30b are designed as notches in the outer edges 25a and 25b of the corresponding metal sheets 100a and 100b. Both the embossed structure 32b of the second metal sheet 100b and a portion of the non-embossed flat area 22b of the second metal sheet 100b are visible through the cut 30a of the first metal sheet 100a, allowing the boundary of the embossed structure 32b to be detected, or at least partially detected, through the cut 30a. Correspondingly, both the embossed structure 32a of the first metal sheet 100a and a portion of the non-embossed flat area 22a of the first metal sheet 100a are visible through the cut 30b of the second metal sheet 100b, allowing the boundary of the embossed structure 32a to be detected, or at least partially detected, through the cut 30b. The embossed structures 32a and 32b are each designed such that they extend mirror-symmetrically with respect to a mirror plane extending perpendicular to the outer edges 25a or 25b. Furthermore, they have a point where the distance between each of them and the outer edge 25a or 25b or the imaginary line that crosses the cut to make the corresponding outer edge continuous.

[0145] Figure 11 schematically shown Figure 4 and 5a Two perspective views of other variations of the above-described details of the isolation plate assembly 100 shown in -c. Here, Figure 11 The upper view of the two views shown illustrates the relationship between... Figure 10 The details in the upper view corresponding to the viewing direction, and, Figure 11 The lower view of the two views shown illustrates the relationship between... Figure 10Details corresponding to the viewing direction in the lower view.

[0146] Figure 11 The variations shown are Figure 10 The difference in the variant shown is that the cuts 30a and 30b are designed as through openings in the corresponding metal sheets 100a and 100b, and are spaced a certain distance from the outer edges 25a and 25b of the corresponding metal sheets 100a and 100b. For example, in Figure 10 As shown in the variant, the outer edges 25a and 25b of the metal sheets 100a and 100b again have embossed portions. However, compared with... Figure 10 The variations shown differ in that the embossed portion in each case does not extend far enough to define the edges 33a, 33b of the cuts 30a, 30b. For example, in Figure 10 As in the variant shown, a portion of the embossed structure 32b and the non-embossed region 22b of the second metal sheet 100b is visible through the cutout 30a of the first metal sheet 100a, and a portion of the embossed structure 32a and the non-embossed region 22a of the first metal sheet 100a is visible through the cutout 30b of the second metal sheet 100b. Regarding the symmetry or definition of the reference point... Figure 11 The embossed structures 32a, 32b and Figure 10 quite.

[0147] Figure 12 The plan schematically illustrates the following. Figure 4 and 5a -c shows another variation of the above-described details of the partition assembly 100. Here, the viewing direction is directed in the negative z-direction 7 and primarily towards the first metal sheet 100a, which significantly obscures the second metal sheet 100b disposed below it in the viewing direction. The first metal sheet 100a has a cutout 30a in the form of a substantially rectangular, elongated through-opening, and annular embossed structures 32a of the same size disposed on each side of the elongated cutout 30a. Similarly, the second metal sheet 100b has a cutout 30b in the form of a substantially rectangular, elongated through-opening, and annular embossed structures 32b of the same size disposed on each side of the elongated cutout 30b. The cutouts 30a and 30b are designed and arranged such that the vertical projections of the cutouts 30a and 30b onto a plane parallel to the metal sheets 100a and 100b and parallel to the xy-plane overlap each other. Here, the vertical projections of cuts 30a and 30b onto the xy-plane together form a cross with fourth-order rotational symmetry relative to an axis of symmetry parallel to the z-direction 7. The projections of embossed structures 32a and 32b onto the xy-plane are each arranged in the region at the ends of the cross arms thus formed. Dashed lines 38a and 38b represent the mirror-symmetric planes of embossed structures 32a and 32b.

[0148] The embossed structures 32a of the first metal sheet 100a are designed and arranged such that, when viewed in the positive z-direction 7, they are visible through the cutouts 30b of the second metal sheet 100b, and the embossed structures 32b of the second metal sheet 100b are designed and arranged such that, when viewed in the negative z-direction 7, they are visible through the cutouts 30a of the first metal sheet 100a. To illustrate the arrangement of the cutouts 30a, 30b and the embossed structures 32a, 32b, in each case, the area of ​​the metal sheet 100a, 100b visible through one of the cutouts is shown in the diagram. Figure 12 Different shaded lines are used to indicate this. For example, in Figure 12 In the diagram, the area of ​​the second metal sheet 100b with the embossed structure 32b, visible through cutout 30a, is shaded from lower left to upper right, while the area of ​​the first metal sheet 100a with the embossed structure 32a, visible through cutout 30b, is shaded from upper left to lower right. The flat area 22a surrounding the first metal sheet 100a with cutout 30a is an intersecting shaded line, thus showing the overlap of the two metal sheets 100a and 100b in this area. The area where the projections of cutouts 30a and 30b overlap in the xy-plane has no shaded line. The partition assembly 100 has a through opening in this area.

[0149] Figure 13 A plan view of a partition assembly 200 is shown. Figure 4 The illustrated isolation plate assembly 100 is a variation. The isolation plate assembly 200 can therefore replace the existing one in each case. Figure 1 The isolation plate 2 in System 1 is shown in the figure. Component 200 includes two basically rectangular metal sheets 200a and 200b of the same or substantially the same size connected to each other. The first metal sheet 200a facing the observer specifically includes through openings 11a-c, an electrochemically active region 18, and sealing arrangements 12a-d. Sealing arrangements 12d completely surround the active region 18 and all through openings 11a-c, and are particularly used to seal the active region 18 relative to the surrounding environment and relative to other areas of System 1 (see Figure 1). Figure 1 The second metal sheet 200b, which is away from the observer and almost completely obscured by the metal sheet 200a, has a corresponding through opening, a corresponding electrochemically active area, and a corresponding sealing arrangement (which is obscured here).

[0150] The second metal sheet 200b has an annular embossed structure 32b in the diagonally opposite corner region 40b. The first metal sheet 200a has a notch 30a in its corresponding diagonally opposite corner region 40a, or more precisely, a strongly rounded corner. The notch 30a in the corner region 40a of the first metal sheet 200a and the embossed structure 32b in the corner region 40b of the second metal sheet 200b are arranged and designed such that, when viewed along the negative z-direction 7, the embossed structure 32b of the second metal sheet 200b is visible through the notch 30a of the first metal sheet 200a in the cut-out corner region 40a of the first metal sheet 200a.

[0151] Conversely, the first metal sheet 200a has annular embossed structures 32a in the other two diagonally opposite corner regions 41a. Furthermore, the second metal sheet 200b has a notch 30b in the corresponding diagonally opposite corner region 41b of the second metal sheet 200b. Figure 13 The cutout 30b in the corner region 41b of the second metal sheet 200b and the embossed structure 32a in the corner region 41a of the first metal sheet 200a are arranged and designed such that, when viewed along the positive z-direction 7, the embossed structure 32a of the first metal sheet 200a is visible through the cutout 30b of the second metal sheet 200b in the cut-out corner region 40b of the second metal sheet 200b.

[0152] The cutouts 30a and 30b and the embossed structures 32a and 32b are each arranged outside the sealing arrangement, which extends around the active area of ​​the respective metal sheet.

[0153] The cut-out or recessed corner 30a of the first metal sheet allows for the positioning of two embossed structures 32b of the second metal sheet through the cut in the first metal sheet. The two embossed structures 32b lie on a common plane. Therefore, these two embossed structures 32b allow for complete determination of the position of the first metal sheet. Since the embossed structures 32b are integrally formed in the second metal sheet in the same forming step as the web of the sealing flange and / or active region, the position of the sealing flange and / or web of the active region of the associated metal sheet can be determined through the first metal sheet based on the position of the two embossed structures 32b. This allows, for example, the position of the area to be coated to be determined and partially coated by means of a position sensor disposed on the side of the first metal sheet opposite to the second metal sheet, without interference from a position sensor placed on the side of the second metal sheet opposite to the first metal sheet.

[0154] Figure 14A plan view of a partition assembly 300 is shown. Figure 4 and 13 Another variation of the isolation plate assemblies 100 and 200 shown. Isolation plate assembly 300 can therefore replace the isolation plate assembly 300 in each case. Figure 1 The isolation plate 2 in system 1 is shown in the figure. The isolation plate assembly 300 again includes a first metal sheet 300a and a second metal sheet 300b, wherein the second metal sheet 300b is largely obscured by the first metal sheet 300a facing the observer. The first metal sheet 300a has, in particular, an electrochemically active region 18 and a sealing arrangement 12d extending around the active region 18 for sealing the active region. For the sake of simplicity, the figures are shown here and in the figures. Figure 15a and 15b Some details, such as the distribution area or the protruding edge of the sealing through-opening, are omitted. On the outer side of the sealing arrangement 12d extending around the active region 18, the first metal sheet 300a has four notches 30a, each designed as a notch in its outer edge, and has an embossed structure 32a adjacent to each said notch. The embossed structures 32a are each circular, while the notches 30a are rectangular with strongly rounded inner ends; they may also be referred to as half-grooves. On the outer side of the sealing arrangement (which corresponds to the sealing arrangement 12d and partially encloses and seals the electrochemically active region of the second metal sheet 300b), the second metal sheet 300b has the same number of corresponding notches 30b (masked) and embossed structures 32b, wherein each of the four embossed structures 32b of the mostly masked second metal sheet 300b is visible through one of the four notches 30a of the first metal sheet 300a, to the extent that its centroid can be clearly determined. The positions of the centroids of these embossed structures 32b allow the locations of all embossed structures on the second metal sheet 300b, to which the embossed structures 32b have been formed during the deformation step, to be clearly determined through the cuts 30a. Accordingly, each of the four embossed structures 32a of the first metal sheet 300a is at least partially visible through one of the four cuts 30b of the first metal sheet 300b (not shown).

[0155] Figure 15a , 15b Each shows a plan view of a partition assembly 400, which is... Figure 4 , 13 Another variation of the partition assemblies 100, 200, and 300 shown in Figure 14. The partition assembly 400 can therefore replace the partition assembly in each case. Figure 1 The isolation plate 2 in system 1 is shown in the figure.

[0156] The separator assembly 400 includes two metal sheets 400a and 400b, wherein the second metal sheet 400b is largely obscured by the first metal sheet 400a facing the observer. The first metal sheet 400a again has an electrochemically active region 18 and a sealing arrangement 12d extending around the active region 18 for sealing the active region. On the outer side of the sealing arrangement 12d extending around the active region 18, the first metal sheet 400a has corresponding cutouts 30a designed as through openings on opposite end faces, and embossed structures 32a adjacent to each cutout. On the outside of the sealing arrangement (which corresponds to sealing arrangement 12d and partially encloses and seals the electrochemically active region of the second metal sheet 400b), the second metal sheet 400b also has two corresponding cutouts 30b (masked) and embossed structures 32b, wherein one of the two embossed structures 32b of the mostly masked second metal sheet 400b is visible through one of the two cutouts 30a of the first metal sheet 400a. Correspondingly, each of the two embossed structures 32a of the first metal sheet 400a is visible through one of the two cutouts 30b of the first metal sheet 400b (not shown).

[0157] With the aid of an image capture unit pointing in the negative z-direction 7, such as a camera, at least one image of component 400 can be created, showing the embossed structure 32a of the first metal sheet 400a and the second embossed structure 32b of the second metal sheet 400b. Based on this image or these images, the centroid of the projection of each of the two embossed structures 32a and each of the two embossed structures 32b onto the xy-plane can be determined. For example, this can be performed using image recognition methods known per se. Subsequently, the distance between the centroid of each of the two embossed structures 32a of the first metal sheet 400a and the nearest corresponding centroid of the two embossed structures 32b of the second metal sheet 400b can be determined or ascertained. Therefore, based on at least one image of component 400, two distance values ​​can be determined or identified, each distance value being a measure of the relative position of one of a pair of embossed structures 32a, 32b, wherein each of these pair of embossed structures includes one of the embossed structures 32a of the first metal sheet 400a and one of the embossed structures 32b of the second metal sheet 400b. Each of these distance values ​​can then be compared with a specified distance value. The deviation of the distance value thus determined or identified relative to the specified distance value is a measure of the quality of the relative alignment of the metal sheets 400a, 400b of component 400 with respect to each other.

[0158] If the determined or ascertained distances are each less than or equal to the specified maximum tolerance value or the maximum tolerance distance, then the relative alignment quality of metal sheets 400a and 400b with respect to each other meets the specified requirements. This situation applies in... Figure 15a As shown in the figures, the embossed structures 32b of the second metal sheet 400b are each arranged concentrically with the cutouts 30a of the first metal sheet 400a, and these embossed structures 32b are visible through these cutouts 30a. The metal sheets 400a and 400b can then be joined, for example, in a connecting tool, or the assembly 400 can be further processed in a separate operational step. For example, this may include coating or printing at least one of the metal sheets 400a and 400b of the assembly 400, particularly coating or printing at least one of the metal sheets 400a and 400b in a joined state of the two metals.

[0159] On the other hand, if the determined or ascertained distances are each greater than the maximum tolerance value or the maximum tolerance distance, then the relative alignment quality of metal sheets 400a and 400b with respect to each other does not meet the specified requirements. This situation occurs in... Figure 15b As shown in the figures, the embossed structures 32b of the second metal sheet 400b are each arranged non-concentrically with respect to the cutouts 30a of the first metal sheet 400a. These embossed structures 32b are visible through these cutouts 30a, but are significantly displaced relative to them. This can, for example, trigger a warning signal, initiate the discarding of component 400, or cause a readjustment of the relative alignment of the metal sheets 400a and 400b with respect to each other. Readjustment can be made until the determined or ascertained distances are each less than or equal to the maximum tolerance value or the maximum tolerance distance.

[0160] As Figures 13 to 15b The generally rectangular plate assembly shown as an alternative can also be other basic shapes, such as those with laterally projecting areas, i.e., in the width direction, particularly in the areas through openings 11a to 11c. In this case, the width of the partition plate can also be defined as the width obtained in the active area across the entire width of the metal layer.

[0161] Another embodiment of the board assembly 100 is in Figures 16a to 16c As shown, this embodiment essentially corresponds to Figures 5a to 5c Therefore, there is no need to repeat the description of the same features here. Figures 16a-16c The isolation panel assembly 100 and Figures 5a-5c The only difference in the partition assembly 100 is that a third cut 30c is provided in the area defined by the vertical projection of the second cut 30b onto the first metal sheet 100a. Furthermore, a fourth cut 30d is provided in the area defined by the vertical projection of the first cut 30a onto the second metal sheet 100b.

[0162] like Figures 16a-16cAs shown, the third cut 30c is preferably formed inside the first embossing structure 32a, wherein the first embossing structure 32a completely surrounds the third cut 30c. Typically, the third cut 30c overlaps with the centroid and / or center point of the first embossing structure 32a. The third cut 30c and the first embossing structure 32a are preferably arranged concentrically and symmetrically with respect to a common axis of symmetry 37.

[0163] This also applies to the fourth notch 30d. The fourth notch 30d can therefore be formed inside the second embossing structure 32b, which completely surrounds the fourth notch 30d. Typically, the fourth notch 30d overlaps with the centroid and / or center point of the second embossing structure 32b. The fourth notch 30d and the second embossing structure 32b are preferably arranged concentrically and symmetrically with respect to a common axis of symmetry 36.

[0164] The third cut 30c and / or the fourth cut 30d are typically designed as through openings in the respective metal sheets 100a and 100b. Alternatively, the cuts 30c and 30d can be designed as notches, such as notches in the outer edges, for example... Figure 8b As in the components. In the exemplary embodiment shown, the third cut 30c and the fourth cut 30d are each designed as slots (elongated holes), and therefore differ in geometry from the circular embossed structures 32a, 32b. However, other geometries are also conceivable and are covered by the present invention.

[0165] exist Figures 16a-16c In this example, the third cut 30c and the fourth cut 30d are identical in shape, size, and position within the corresponding embossed structures 32a and 32b, or identical within their manufacturing tolerances. However, at least one of these aspects of the cuts 30c and 30d may differ from each other. Furthermore, the longitudinal direction defined by the third cut 30c is arranged at an angle to the longitudinal direction defined by the fourth cut 30d, shown as perpendicular in this example. Other orientations of the cuts 30c and 30d relative to each other are also possible.

[0166] The surface area of ​​the embossed structure 32a of the first metal sheet 100a is larger than the surface area of ​​the third cut 30c. The cutting edge of the third cut 30c is fully visible through the second cut 30b. The center point (or centroid) of the embossed structure 32a and the center point (or centroid) of the second cut 30b can be determined from both sides of the partition plate assembly 100 through the third cut 30c.

[0167] Similarly, the surface area of ​​the embossed structure 32b of the second metal sheet 100b is larger than the surface area of ​​the fourth notch 30d. The cutting edge of the fourth notch 30d is fully visible through the notch 30a. The center point (or centroid) of the embossed structure 32b and the center point (or centroid) of the second notch 30a can be determined from both sides of the partition plate assembly 100 through the fourth notch 30d.

[0168] Although incisions 30c and 30d are only... Figures 16a-16c As shown in Figures 6-15, but it is clear that a third cut 30c and / or a fourth cut 30d may also be provided in other embodiments of Figures 6-15, and protection may be claimed in combination with the various features in Figures 6-15.

Claims

1. A separator assembly (100) for an electrochemical system, the separator assembly comprising a first metal sheet (100a) and a second metal sheet (100b), the first metal sheet and the second metal sheet being at least partially in contact with each other along their opposing flat sides. in, The first metal sheet (100a) has a first circumferential sealing structure (12d) for sealing the electrochemically active region (18), a first cutout (30a) disposed on the outside of the first circumferential sealing structure (12d), and a first embossed structure (32a) disposed on the outside of the first circumferential sealing structure (12d). The second metal sheet (100b) has a second circumferential sealing structure (12d) for sealing the electrochemically active region, a second cutout (30b) disposed on the outside of the second circumferential sealing structure (12d), and a second embossed structure (32b) disposed on the outside of the second circumferential sealing structure (12d). The second embossed structure (32b) is at least partially disposed in the region of the second metal sheet (100b) defined by the vertical projection of the first cut (30a) onto the second metal sheet (100b), such that the second embossed structure (32b) is visible through the first cut (30a), and The first embossed structure (32a) is at least partially arranged in the region of the first metal sheet (100a) defined by the vertical projection of the second cut (30b) onto the first metal sheet (100a), such that the first embossed structure (32a) is visible through the second cut (30b).

2. The isolation plate assembly (100) according to claim 1, characterized in that, The first cut (30a) includes a through opening in the first metal sheet (100a), and / or wherein, The second cut (30b) includes a through opening in the second metal sheet (100b).

3. The isolation plate assembly (100) according to claim 1 or 2, characterized in that, The first cut (30a) extends to the outer edge (25a) of the first metal sheet (100a), such that the outer edge (25a) of the first metal sheet (100a) at least partially defines the first cut (30a), and / or wherein, The second cut (30b) extends to the outer edge (25b) of the second metal sheet (100b) such that the outer edge 25b of the second metal sheet (100b) at least partially defines the second cut (30b).

4. The isolation plate assembly (100) according to claim 1, characterized in that, The first embossed structure (32a) extends to the outer edge (25a) of the first metal sheet (100a), and / or therein, The second embossed structure (32b) extends to the outer edge (25b) of the second metal sheet (100b).

5. The isolation plate assembly (100) according to claim 1, characterized in that, In the region of the second metal sheet (100b) defined by the vertical projection of the first cut (30a) onto the second metal sheet (100b), the second metal sheet (100b) has a fourth cut (30d) in addition to the second embossed structure (32b), and / or wherein, in the region of the first metal sheet (100a) defined by the vertical projection of the second cut (30b) onto the first metal sheet (100a), the first metal sheet (100a) has a third cut (30c) in addition to the first embossed structure (32a).

6. The isolation plate assembly (100) according to claim 5, characterized in that, The third cut (30c) is at least partially or entirely formed inside the first embossed structure (32a), and / or therein, The fourth cut (30d) is formed at least partially or entirely inside the second embossed structure (32b).

7. The isolation plate assembly (100) according to claim 5, characterized in that, The third cut (30c) overlaps with the centroid and / or center point of the first imprinted structure (32a), and / or wherein, The fourth cut (30d) overlaps with the centroid and / or center point of the second embossed structure (32b).

8. The isolation plate assembly (100) according to claim 7, characterized in that, The third cut (30c) and the first embossing structure (32a) are arranged concentrically, and / or the fourth cut (30d) and the second embossing structure (32b) are arranged concentrically.

9. The isolation plate assembly (100) according to claim 1, characterized in that, The vertical projection of the first cut (30a) onto the plane defined by the first metal sheet (100a) or the second metal sheet (100b) and the vertical projection of the second cut (30b) onto the plane at least partially overlap each other.

10. The isolation plate assembly (100) according to claim 1, characterized in that, The first embossed structure (32a) is symmetrical with respect to a first plane of symmetry or a first axis of symmetry, wherein the first plane of symmetry or the first axis of symmetry is oriented perpendicular to a first sheet plane defined by the first metal sheet (100a), and / or wherein the second embossed structure (32b) is symmetrical with respect to a second plane of symmetry or a second axis of symmetry, wherein the second plane of symmetry or the second axis of symmetry is oriented perpendicular to a second sheet plane defined by the second metal sheet (100b).

11. The isolation panel assembly (100) according to claim 10, characterized in that, The first embossed structure (32a) has integer or continuous rotational symmetry with respect to the first axis of symmetry, and / or wherein the second embossed structure (32b) has integer or continuous rotational symmetry with respect to the second axis of symmetry.

12. The isolation plate assembly (100) according to claim 1, characterized in that, The first metal sheet (100a) has an embossed structure extending around the first cut (30a) or a plurality of embossed structures arranged around the first cut (30a), and / or wherein the second metal sheet (100b) has an embossed structure extending around the second cut (30b) or a plurality of embossed structures arranged around the second cut (30b).

13. The isolation panel assembly (100) according to claim 1, Its features are, The first metal sheet (100a) has another cutout (31a) arranged on the outside of the first circumferential sealing structure (12d) and another embossed structure (33a) arranged on the outside of the first circumferential sealing structure (12d). The second metal sheet (100b) has another cutout (31b) arranged on the outside of the second circumferential sealing structure (12d) and another embossed structure (33b) arranged on the outside of the second circumferential sealing structure (12d). Wherein, the other embossed structure (33b) of the second metal sheet (100b) is at least partially arranged in the region of the second metal sheet (100b) defined by the vertical projection of the other cut (31a) of the first metal sheet (100a) onto the second metal sheet (100b), such that the other embossed structure (33b) of the second metal sheet (100b) is visible through the other cut (31a) of the first metal sheet (100a), and The other embossed structure (33a) of the first metal sheet (100a) is at least partially arranged in the region of the first metal sheet (100a) defined by the vertical projection of the other cut (31b) of the second metal sheet (100b) onto the first metal sheet (100a), such that the other embossed structure (33a) of the first metal sheet (100a) is visible through the other cut (31b) of the second metal sheet (100b).

14. The isolation panel assembly (100) according to claim 13, characterized in that, The first metal sheet (100a) and the second metal sheet (100b) each have a rectangular or substantially rectangular shape having a length and a width, wherein the width is less than or equal to the length in each case, wherein the minimum distance between the first embossed structure (32a) and the other embossed structure (33a) of the first metal sheet (100a) is at least 80% of the width of the first metal sheet (100a), and / or wherein the minimum distance between the second embossed structure (32b) and the other embossed structure (33b) of the second metal sheet (100b) is at least 80% of the width of the second metal sheet (100b).

15. The isolation panel assembly (100) according to claim 13, characterized in that, The first metal sheet (100a) and the second metal sheet (100b) each have a rectangular or substantially rectangular shape having a length and a width, wherein the width is less than or equal to the length in each case, wherein the minimum distance between the first embossed structure (32a) and the other embossed structure (33a) of the first metal sheet (100a) is at least 80% of the length of the first metal sheet (100a), and / or wherein the minimum distance between the second embossed structure (32b) and the other embossed structure (33b) of the second metal sheet (100b) is at least 80% of the length of the second metal sheet (100b).

16. The isolation panel assembly (100) according to claim 13, Its features are, The centroid of the first embossed structure (32a) in the plane defined by the first metal sheet or the second metal sheet (100b) is defined by the vertical projection of the first embossed structure (32a) onto the plane. The centroid of the second embossing structure (32b) on the plane is defined by the vertical projection of the second embossing structure (32b) onto the plane. Wherein, the centroid of the other embossed structure of the first metal sheet (100a) on the plane is defined by the vertical projection of the other embossed structure of the first metal sheet (100a) on the plane, and Wherein, the centroid of the other embossed structure of the second metal sheet on the plane is defined by the vertical projection of the other embossed structure of the second metal sheet on the plane; This specifies the distance and maximum tolerance value; and Wherein, the actual distance between the centroid of the first embossing structure (32a) and the centroid of the second embossing structure (32b) deviates from the specified distance by less than the specified maximum tolerance value, and Wherein, the actual distance between the centroid of the other embossed structure of the first metal sheet (100a) and the centroid of the other embossed structure of the second metal sheet deviates from the specified distance by less than the specified maximum tolerance value.

17. The isolation panel assembly (100) according to claim 1, Its features are, The first metal sheet (100a) has at least three spaced cuts arranged on the outside of the first circumferential sealing structure (12d) and at least three spaced embossed structures arranged on the outside of the first circumferential sealing structure (12d). The second metal sheet has at least three spaced-apart cuts arranged on the outside of the second circumferential sealing structure (12d) and at least three spaced-apart embossed structures arranged on the outside of the second circumferential sealing structure (12d). In this arrangement, each of the at least three embossed structures of the second metal sheet is at least partially arranged in an area of ​​the second metal sheet defined by the vertical projection of one of the at least three cuts of the first metal sheet (100a) onto the second metal sheet, such that in each case, at least one of the at least three embossed structures of the second metal sheet is visible through each of the at least three cuts of the first metal sheet (100a), and In this arrangement, each of the at least three embossed structures of the first metal sheet (100a) is at least partially arranged in the region of the first metal sheet (100a) defined by the vertical projection of one of the at least three cuts of the second metal sheet onto the first metal sheet (100a), such that in each case, at least one of the at least three embossed structures of the first metal sheet (100a) is visible through each of the at least three cuts of the second metal sheet.

18. A method for producing a partition assembly (100) according to any one of claims 1 to 17, the method comprising the steps of: A first cut (30a) is punched out from the first metal sheet (100a) in the first tool. In the second tool, the first embossed structure (32a) adjacent to the first cut (30a) is embossed into the first metal sheet (100a). In the third tool, a second cut (30b) is punched out from the second metal sheet (100b). In the fourth tool, a second embossed structure (32b) adjacent to the second notch (30b) is embossed into the second metal sheet (100b), and The first metal sheet (100a) and the second metal sheet (100b) are overlapped and placed such that the first metal sheet (100a) and the second metal sheet (100b) are at least partially in contact with each other along their facing sides, and the first embossed structure (32a) of the first metal sheet (100a) is at least partially arranged in the area defined by the vertical projection of the second cut (30b) of the second metal sheet (100b) onto the first metal sheet, and the second embossed structure (32b) of the second metal sheet (100b) is at least partially arranged in the area defined by the vertical projection of the first cut (30a) of the first metal sheet (100a) onto the second metal sheet (100b).

Images