Laminating equipment for laminating multilayer endless webs for the manufacture of energy cells.

Abstract

A laminating apparatus for a multilayer endless web 3 for the manufacture of an energy cell, comprising at least one separator web 4, 6 and at least one electrode 5, has a press device for laminating the multilayer endless web 3 under the action of a pressing force. The press device has a press surface having at least one recess, the recess being positioned such that when the recess is subjected to the action of a pressing force through the press surface, it covers one of the edges 14, 15, 16, 17 of the electrodes 5, 7.

Description

Technical Field

[0001] The present invention relates to a laminating apparatus for laminating a multi-layer endless web for the production of energy cells, having the characteristics of the superordinate concept of claim 1.

Background Art

[0002] An energy cell or, equally, an energy storage unit in the sense of the present invention is used, for example, in motor vehicles, other land vehicles, ships, airplanes or equally in installed equipment such as, for example, a photovoltaic installation, in the form of a battery cell or a fuel cell, in which a very large amount of energy needs to be stored over a relatively long time interval.

[0003] For this purpose, it is possible for such an energy cell to have a structure consisting of a plurality of segments laminated into one stack. These segments are each formed from alternating anode sheets and cathode sheets, which are separated from each other by separator sheets, which are likewise manufactured as segments. The segments are pre-cut during the manufacturing process and then stacked into the stack in a predefined order and joined to each other by lamination. In that case, the anode sheets and the cathode sheets are first cut from an endless web and then placed on top of an endless web of separator material in an individualized state with a spacing. This subsequently formed "two-layered" endless web consisting of separator material with the placed anode sheet or cathode sheet is then cut into segments again in a first step with a cutting device, in which case these segments are formed here in a two-layered manner by separator sheets with the anode sheet or cathode sheet placed thereon. To the extent that this is technically feasible or necessary, endless webs of separator material having anode and cathode sheets can be stacked prior to cutting, thereby forming an endless web having a first endless layer of separator material having an anode or cathode sheet placed on top of it, and a second endless layer of separator material also having an anode or cathode sheet placed on top of it. This "four-layered" endless web is then cut into segments using a cutting device, and these segments are formed in this case in four layers: a first separator sheet, an anode sheet, a second separator sheet, and a cathode sheet adjacent to the second separator sheet. The advantage of this solution is that one cut may be saved. Furthermore, the cut electrodes may similarly be placed on an endless separator web and stacked on yet another endless separator web to form a three-layer endless web, from which a three-layer segment having a separator sheet, an electrode sheet, and yet another separator sheet is then cut. In the spirit of this invention, a segment is accordingly a single-layer segment of a separator material, an anode sheet, or a cathode sheet, or similarly, a two-layer, three-layer, or four-layer segment of the above-described structure.

[0004] Furthermore, the aforementioned "two-layer" or "four-layer" endless webs can similarly be complemented into "three-layer" or "five-layer" endless webs by placing yet another separator sheet on top of the electrodes, in which case these endless webs each have a separator web on both sides.

[0005] Selectively, electrodes can exist in an endless web, i.e., uncut, in a "two-layer," "three-layer," "four-layer," or "five-layer" endless web, which are then cut into significantly longer lengths and then, for example, wound up. Selectively, the endless web can be first wound up and then cut after the winding is complete. In this case, the electrodes do not exist as spaced segments within the endless web, but rather, instead, they exist within a single segment, which extends uninterrupted within the intermediate space between the separator webs.

[0006] Furthermore, within the endless web, electrodes in the form of a copper web, copper film, or comparable support material may be provided with intermittent coverings. In this electrode, each of these covering portions forms a section-like, spaced-out rising portion within the electrode.

[0007] For laminating "two-layer," "three-layer," "four-layer," or "five-layer" endless webs, these endless webs are guided between two press devices, which apply a pressing force to the endless webs. In this case, electrodes are pressurized together with the separator web within the endless web. Essentially, the electrodes, along with the separator web, are bonded and laminated together by the action of pressing force using a press device. Additionally, lamination can be assisted by the heat generated by the pressing force. Furthermore, additional heating zones or cooling zones may be provided to regulate the temperature of the endless web during lamination. For the realization of high-quality bonding, it is desirable that the endless web be subjected to the same compressive force as much as possible along its longitudinal and transverse extensions.

[0008] The problem is that in this case, the electrodes are narrower than the endless web of the separator material, and therefore the separator material protrudes laterally beyond these electrodes. Consequently, the electrodes have free ridges on their edges, and the separator material overlaps these laterally.

[0009] As long as the electrodes are spaced apart from each other in the form of already cut segments within the endless web, These electrodes, based on their spacing, additionally form intermediate spaces within the endless web, and in doing so, these electrodes additionally hold the separator webs at a certain distance from each other, based on the thickness of these separator webs within the intermediate spaces. Consequently, the electrode has additional free ridges on the side surfaces of the edges that demarcate the intermediate space.

[0010] In order that the electrode is not hindered by excessively high compression in its functionality, the pressing force can be simply limited and increased, and damage to energy cells within the region of the electrode's edges is always detrimental to the quality of these energy cells and should therefore be avoided as much as possible. The lamination of the endless web presents problems within the edge portions and, to the extent present, within the intermediate space between electrodes, based on the free edges of the electrodes present therein. [Overview of the project] [Problems that the invention aims to solve]

[0011] Given this background, the fundamental problem underlying this invention is: The objective is to provide a laminating apparatus that enables the lamination of an endless web with a reduced probability of electrode damage within the edge region. [Means for solving the problem]

[0012] In accordance with the present invention, a laminating apparatus having the features of claim 1 is proposed to solve this problem.

[0013] Further advantageous configurations can be seen from the dependent claims, drawings, and descriptions to which they belong. [Effects of the Invention]

[0014] In accordance with the basic concept of this invention, The pressing surface is provided with at least one first and second recessed portion, It is proposed that these recesses extend along the longitudinal direction of the endless web and are spaced apart from each other, with this spacing being smaller than the spacing between the side edges of the electrodes that extend along the longitudinal direction of the endless web.

[0015] In the proposed arrangement, the recesses provided on the press surface form the contour of the press surface, and these recesses allow for a reduction in the load on the electrode 5 within the ridge region. The pressing surface has a contour in this case, which is formed by a recess so that the endless web is not subjected to any pressing force within the edge region during lamination. Conversely, this means that the pressing force can be increased against the lamination of the endless web without increasing the pressing force within the edge region of the electrodes, and without increasing the probability of electrode damage within the edge region of these electrodes. Based on the increased pressing force, the endless web can be bonded to each other in an improved manner within the region between these electrodes, and thus these electrodes are subsequently fixed to each other in an improved manner within the completed and laminated endless web, without slipping or shifting position. The same is true, in particular, for electrodes in segments cut from the endless web during subsequent operation of the energy cell. The proposed solution is particularly advantageous when the electrodes are narrower than the separator web and the separator web protrudes laterally beyond the electrodes. The first and second recesses reduce the load on the electrode during lamination within the front and rear ridge regions in the direction of electrode supply. In this case, the distance between the first recess and the second recess is the distance between the opposing ridge sides of these recesses.

[0016] Furthermore, it is proposed that a press device laminate a multi-layer endless web under the introduction of heat within a laminating device. Lamination, i.e., the joining of endless webs of separator material and the joining with the electrodes, is effected by the polymer penetrating from one layer to the other, which is caused by the adhesive force acting within the other, the interface. Precisely this adhesive force can be simplified and achieved by the introduction of heat. 。

[0017] It must be noted, however, in that case that the material within the interface is not compressed to such an extent as to prevent the ion exchange important for the function of the energy cell under the introduction of heat and the acting pressing force.

[0018] Furthermore, a plurality of electrodes regularly arranged at intervals from each other are provided within the endless web, at least one third recess and a fourth recess are provided on the pressing surface, and it is proposed that the fourth recess has a smaller interval than the length of the electrodes in the longitudinal direction of the endless web with respect to the third recess. The third and fourth recesses have the same function as the first and second recesses, and these third and fourth recesses cover the ridge portions in front of and behind the electrodes throughout the lamination. They are arranged to cover in the longitudinal direction of the endless web. In that case, the interval between the third recess and the fourth recess is intentionally selected to be shorter than the length of the electrodes, and thus the third recess and the fourth recess cover the ridge portion in any case. The distance between the third recess and the fourth recess is the distance between the opposing side edges of both recesses. As long as the endless web is an endless web having intermittent coverings, the covered portions correspond to electrodes, and the distances between these coverings correspond to the distances between electrodes.

[0019] In this case, the first, second, third, and fourth recesses are formed and positioned so that they complement a single closed, ring-shaped recess, and the form of this recess can correspond to the shape of the outer edge of the electrode. The ring shape of the recess can be rectangular, oval, or otherwise as appropriate, depending on the molding state of each electrode. Since the recess has a closed ring shape, all edges of the electrode are covered by the recess on a single surface, and consequently, the load during lamination is reduced.

[0020] Furthermore, the press device is equipped with two press rolls having a circular cross-section. It is proposed that these press rolls be arranged such that there is a gap between the outer surfaces of these press rolls through which the endless web passes. The advantage of the proposed solution lies in the fact that, by using press rolls within the proposed arrangement, lamination can be achieved with extremely high productivity, i.e., at the transport speed of the endless web, advantageously within the drum process.

[0021] In that case, it is further proposed that the gap has a gap width, and that this gap width is smaller than the thickness of the endless web. As the endless web is transported through the gap, the pressing force required for lamination can be applied by these press rolls, depending on the proposed dimensions of the gap. Consequently, special feed movements of the press rolls are no longer necessary.

[0022] In that case, the first recess and / or the second recess and / or the third recess and / or the fourth recess may, advantageously, be located on a portion of the sheath surface of one or both of the press rolls. By forming the recesses within the sheath surface of the press rolls, these press rolls directly form a press surface that conforms to the contour of the electrodes located within the endless web.

[0023] In that case, it is proposed that the first recess and the second recess are located on the side edges of the casing surface. As a result, the first and second recesses come into contact within the edge portion of the endless web when the press roll rolls on the endless web. In this case, the first and second recesses can be realized on the outer surface in the form of a closed ring extending around the periphery, so that the first and second recesses are in constant contact with the endless web and reduce the load within the region of the lateral edge of the electrode.

[0024] In that case, the third recess and the fourth recess are arranged parallel to the rotation axis of the press roll, and each recesses a portion of the outer surface. It is proposed that the third and fourth recesses are spaced apart in the unfolding of the arc length of the sheath surface, and that this spacing is shorter than the length of the electrode in the longitudinal direction of the endless web. The proposed solution ensures that, during the corresponding synchronization of the press roll's rotational motion with the transport motion of the endless web, the press rolls, with their third and fourth recesses, always precisely cover the front and rear edges of the electrodes in the feeding direction of the endless web. The distance between the third recess and the fourth recess is, in this case, the unfolded length of the sheath surface between the opposing edge surfaces of the recesses.

[0025] In that case, the press rolls are arranged so that their rotational axes are aligned parallel to each other. With the proposed arrangement of the press rolls, these press rolls can be connected and / or synchronized with each other, particularly easily and simply configured with a drive mechanism. Furthermore, this allows for a particularly compact structure of the laminating apparatus.

[0026] Furthermore, the press device has at least one press belt, and the press belt is It is proposed that the press belt is positioned so as to contact one of the surfaces of the endless web. The press force acting on the endless web can be balanced by the press belt. In this case, the press belt is advantageously the same or larger in width perpendicular to the feeding direction of the endless web, so that the endless web is exposed to the press force and laminated across its entire width. The press belt can be formed such that it generates the pressing force itself, or is subjected to the pressing force via a separate pressing force generating device, such as a press roll. In the latter case, the pressing force is further transmitted by the press belt to the endless web. The press belt itself can be formed in the form of a flexible fiber-reinforced woven belt, a steel belt, or an extremely delicate link chain, or any other of the sort. In that case, the press belt can be formed as a driven endless belt, or as a fixed-position press belt with a friction-reduced surface. As long as the press belt is formed as a driven endless belt, this endless belt can additionally be used for transporting the endless web. Conversely, if the press belt is formed as a fixed-position press belt, additional equipment is required for transporting the endless web. In this case, the endless web is actively pulled out alongside the press belt.

[0027] In this case, the first recess and / or the second recess and / or the third recess and / or the fourth recess may be located on the surface of the press belt, which is advantageous to that extent. This is because the press belt contacts the surface of the endless web, and consequently, the pressing force is directly applied to and transmitted. Accordingly, the press belt, through the arrangement of recesses within the press belt itself, conforms to the shape and geometric form of the endless web and the electrodes positioned within it, within the contour of the press belt.

[0028] In that case, it is proposed that two additional press belts are provided, and these press belts are positioned opposite each other, with a gap between their surfaces facing the endless web through which the endless web passes. The endless web can thus be subjected to and pressed by compressive forces on both sides.

[0029] In that case, the gap width is advantageously only slightly smaller than the thickness of the endless web, and therefore the endless web is automatically subjected to the pressing force for lamination as it passes and with the corresponding support of the press belt.

[0030] Furthermore, the press device has two pressing surfaces positioned opposite each other, and these pressing surfaces allow the press device to contact different sides of the endless web, and These press surfaces are provided with a first recess and / or a second recess and / or a third recess and / or a fourth recess, and It is proposed that the first, second, third, and / or fourth recesses of these press surfaces have different spacings, and / or different depths, and / or different shapes.

[0031] Due to the varying spacing of the recesses, the press surfaces can be formed in shape individually with respect to the contours on both sides of the endless web. As long as the endless web, for example, a four-layer endless web or a five-layer endless web, is formed by the structure described at the beginning, having cathodes and anodes arranged therein, the fact that the anode is basically larger than the cathode, and consequently the protected edges of the anode have a larger gap than the edges of the cathode, can be taken into consideration. Furthermore, the recesses can have different depths, and thus the applied pressing force can be adapted to the surface of the endless web in different ways in terms of the distribution and magnitude of these pressing forces. Moreover, different shapes of the recesses can be considered for different treatment of the electrode edges.

[0032] Furthermore, it is proposed that the pressing surface be adjustable in width. The adjustable width of the press surface allows the laminating device to be adjusted for laminating endless webs of different widths. In this case, the width of the press surface is perpendicular to the longitudinal direction of the endless web within the plane of the endless web.

[0033] Furthermore, it is advantageous for the pressing surface to have a width corresponding to the width of the endless web, or a multiple of this width. The proposed solution allows the laminating apparatus to be specifically formed for laminating an endless web of a specified width, or to laminate multiple endless webs of a specified width in a parallel arrangement. As long as the press surface is adjustable, a predetermined position of the width of the press surface is also intended for this purpose, and thus the press surface can be adjusted with little effort from a position for laminating a single endless web to a position for two or more parallel endless webs.

[0034] The present invention will be described below based on advantageous embodiments and in reference to the attached figures. [Brief explanation of the drawing]

[0035] [Figure 1] This is a diagram of a part of a laminating apparatus, showing a three-layer endless web and a press device having two press rolls. [Figure 2] This is a partial diagram of a laminating apparatus, showing a three-layer endless web and a press device having two press rolls and two press belts. [Figure 3] This is a diagram of a part of a laminating apparatus, showing a four-layer endless web, a press device with two press rolls, and a press belt. [Modes for carrying out the invention]

[0036] In Figure 1, a portion of a laminating apparatus according to the present invention can be seen. The laminating apparatus comprises a press having two press rolls 1 and 2, which are formed as a cylindrical drum having a circular cross-section. The press rolls 1 and 2 are aligned parallel to each other along their rotational axes, and are positioned such that a gap S with a constant gap width SW exists between the outer surfaces 12 and 13 of the press rolls in the direction of the rotational axis and therefore perpendicular to the illustrated plane.

[0037] Furthermore, an endless web 3 to be laminated is provided, which extends through the gap S and has a thickness D. The endless web 3 is formed by a "three-layer" endless web 3 having a separator web 4 on the upper side, a separator web 6 on the lower side, and an electrode 5 positioned between them. The electrodes 5 are arranged with an intermediate space 8 at the same interval A, and have a width less than the separator webs 4 and 6, so that these separator webs 4 and 6 protrude laterally beyond the electrodes 5.

[0038] The gap width SW of the gap S is set to be smaller than the thickness D of the endless web 3, so that the endless web 3 is slightly compressed and laminated as it passes through the gap S. The thickness D2 of the separator webs 4 and 6 ranges from 15 to 25 μm, respectively, while the electrode 5 has a thickness D1 ranging from 150 to 400 μm. Consequently, in the embodiment at issue, the resulting electrode web thickness D ranges from approximately 180 μm to 450 μm. The gap width SW is set to be 20 to 100 μm, preferably 40 to 60 μm, smaller than the thickness D of the endless web, so that the endless web 3 is slightly compressed when passing through the gap S. The intermediate space 8 is formed by the spacing of the electrodes 5 and has a height corresponding to the thickness D1 of the electrodes 5, i.e., 180 to 400 μm. Furthermore, the intermediate space 8 has a length corresponding to the spacing A between the electrodes 5, which is 3 mm between the anodes and 6 mm between the cathodes in the supply direction. In this case, it is worth pursuing to make the spacing A between these electrodes 5 as small as possible in order to increase the material utilization of the endless web 3 and to increase the number of electrodes 5 within a predetermined length of the endless web 3.

[0039] The endless web 3 is transported in the supply direction T and, in that case, pulled through the gap S. The press rolls 1 and 2 can themselves be actively driven, for example by individual drive devices in the form of servo motors, to rotate in opposite directions aligned in the direction of the arrow P, so that these press rolls actively transport the endless web 3, additionally through frictional engagement. Selectively, the press rolls 1 and 2 may be supported only rotatably, and thus these press rolls may be driven by themselves to rotate through frictional engagement with the endless web 3. In this case, the press rolls 1 and 2 simply roll passively on the surface of the endless web 3.

[0040] In both press rolls 1 and 2, a third recess 10 and a fourth recess 11 are provided in the form of radially inwardly aligned recesses within the outer surfaces 12 and 13, and these third recess 10 and fourth recess 11 are positioned so as to cover at least one of the edges of the electrode 5 during the rotational movement of the press rolls 1 and 2. Furthermore, the third recess 10 and the fourth recess 11 are longer than the distance A between the electrodes 5 in the unfolding of the outer periphery with respect to the rotation axis of the press rolls 1 and 2, and therefore, these third and fourth recesses cover on one side the two ridges 14 and 16 and 15 and 17 of the two opposing electrodes 5, respectively. The third recess 10 and the fourth recess 11 are, These third and fourth recesses are positioned within the regions of the ridges 14, 15, 16, and 17 of the endless web 3 throughout the transport motion of the endless web 3 and throughout the rotational motion of the press rolls 1 and 2, and the electrodes 5 are positioned in the press rolls 1 and 2 such that the load is reduced within the regions of the ridges 14, 15, 16, and 17 as a result.

[0041] Furthermore, in addition to the third recess 10 and the fourth recess 11, it is possible that the press rolls 1 and 2 may also be provided with recesses that are not shown. These recessed areas are The length of the unfolded arch-shaped segment is positioned on the outer surface 12 and 13 such that, in the rotational direction of the press roll, it corresponds to a maximum of the length of the electrode 5 between the third recess 10, the fourth recess 11, and yet another recess. Accordingly, the third recess 10, the fourth recess 11, and yet another recess always cover the edges 14, 15, 16, and 17 of the electrode 5 in the intermediate space 8. To the extent that the present invention is described with respect to the third and fourth recesses 10 and 11, and hereafter with respect to the first and second recesses, the designations first, second, third, and fourth do not imply any order or sequence. Accordingly, the designations "third" and "fourth" do not necessarily presuppose the presence of the first and second recesses, and vice versa. These markings are used solely for the identification of recesses, where each recess is defined by its orientation and arrangement.

[0042] The outer surfaces 12 and 13 here form the press surfaces of the press device, and these press surfaces are contoured for the endless web 3 to be laminated by the configuration of the third recess 10 and the fourth recess 11, and, where present, by any further recesses. In this case, the third recess 10 and the fourth recess 11, and the intermediate space 8 are shown in an exaggerated manner for clarity.

[0043] Selective embodiments of the present invention can be identified within Figure 2. The press apparatus here further comprises two press belts 20 and 21 alongside both press rolls 1 and 2, which contact the upper and lower surfaces of the endless web 3. The press rolls 1 and 2 here are formed and arranged identically to the press rolls 1 and 2 in Figure 1, differing only in that these press rolls are formed as cylindrical drums having outer casings 12 and 13 with the same radius, i.e., without recesses, around their outer circumference. The press rolls 1 and 2 are in contact with the free surfaces of both press belts 20 and 21. The press belts 20 and 21 here have a third recess 10 and a fourth recess 11 on the surface of these press belts facing the endless web 3, and therewith, they form a pressing surface of the press device that acts on the endless web 3. Press rolls 1 and 2 may, however, have different diameters and radii, as long as it is advantageous for lamination.

[0044] The third recess 10 and the fourth recess 11 of the press belts 20 and 21 are sized and positioned to correspond to the third recess 10 and the fourth recess 11 of the press rolls 1 and 2 in the first embodiment. The important gap S and gap width SW for laminating the endless web 3 are, in this case, defined by the spacing of the press belts 20 and 21, and so the press rolls 1 and 2 have a spacing that is increased by the sum of the thicknesses of the press belts 20 and 21 by the outer surfaces 12 and 13 of these press rolls. The third recess 10 and the fourth recess 11 have a gap U between their opposing edge surfaces, and this gap is smaller than the length of the electrode 5 in the supply direction T. Furthermore, it is possible that the press belts 20 and 21 may have additional recesses, which are similarly spaced apart from each other in the supply direction T of the endless web 3, with a spacing smaller than the length of the electrode 5. In this case, the spacing between these recesses is the spacing between the opposite side edges of these recesses.

[0045] Selectively or additionally, further, first and second recesses may be provided in the third and fourth recesses 10 and 11 on the edge sides of the press belts 20 and 21, or the press rolls 1 and 2 in the embodiment of Figure 1, and these first and second recesses are These first and second recesses are positioned to cover the lateral edges of the electrode 5, which are aligned in the supply direction T of the endless web 3. Consequently, during lamination, the load on these lateral edges of the electrode 5 within the endless web 3 is also reduced.

[0046] As long as the first and second recesses are also provided, similar to the third and fourth recesses 10 and 11, these third and fourth recesses 11, together with the first and second recesses, can complement each other to form a closed ring-shaped recess, in which case this ring shape corresponds to the ridge line of the electrode 5. As long as the electrode 5 is formed in a rectangular shape, for example, the recess is advantageously formed in the form of a closed rectangular ring and completely covers the edge of the electrode 5 on one side.

[0047] The third recess 10 and the fourth recess 11 may be provided in a repeating, regular arrangement on the press rolls 1 and 2, or on the press belts 20 and 21, such that in unfolding this arrangement corresponds to the pattern of the edges of the electrodes 5 within the endless web 3.

[0048] In Figure 3, one embodiment of the present invention is recognizable, in which the endless web 3 is formed by a "four-layer" endless web 3 having a separator web 4 on the upper side, a separator web 6 in the middle, a plurality of anodes 18 positioned between the separator webs 4 and 6, and a plurality of cathodes 7 positioned below the central separator web 6. The anode 18 is formed to be larger than the cathode 7, and therefore, when these anodes 18 are arranged in a pair with respect to the cathodes 7, they have a smaller end face spacing A from each other than that of the cathodes 7. Consequently, the third recess 10 and the fourth recess 11 within the lower press roll 1 that abuts the cathode side of the endless web 3 have a longer length in the circumferential direction of the press roll 1 during deployment than the third and fourth recesses 10 and 11 within the upper press roll 2 that abuts the anode side of the endless web 3. The third recess 10 and the fourth recess 11 in the upper press roll 2 have a length in the rotational direction P of the press roll 2 when the recessed outer surface 12 is unfolded, and this length is sized such that these third and fourth recesses cover the anode 18 and the intermediate space 8 between the edges 14 and 16 of both adjacent anodes 18 when in contact with the upper separator web 4. The third recess 10 and the fourth recess 11 in the lower press roll 1 have a length in the rotational direction P of the press roll 1 when the recessed outer surface 13 is unfolded, and this length is sized such that these third and fourth recesses cover the intermediate space 8 between the cathode 7 and the edges 15 and 17 of both adjacent cathodes 7 as the endless web 3 passes through.

[0049] The press rolls 1 and 2 here form a pressing force generating device, which here applies a pressing force to the press belts 20 and 21. As a pressing force generating device, however, similarly, rod carpets (Stangenteppich), pressing units having corresponding pressing cylinders, pneumatic pressing force generating devices having, for example, air-fillable cushions, and other such devices, These can be used insofar as they are suitable for evenly applying the required pressing force to the press belts 20 and 21.

[0050] In these embodiments, lamination of an endless web 3 having cut electrodes 5 arranged at intervals A from each other has been described. However, it is also possible to consider laminating the endless web 3 having an endless electrode web using a laminating device. In this case, the third and fourth recesses 10 and 11 are omitted, and only the first and second recesses are provided within the region of the edge side surface of the press surface. The first and second recesses are positioned corresponding to the progression of the longitudinal edges of both electrode webs, and cover these electrode webs during lamination with the desired effect of reducing the load.

[0051] The first and second recesses extend in the longitudinal direction of the press surface, the endless web 3 to be laminated, and the supply direction T, and are therefore also considered to be longitudinal grooves of these press surfaces, and these longitudinal grooves are arranged parallel to each other and have a distance between them. This spacing is smaller than the width of the electrode web, and in this case, the spacing between the first recess and the second recess is the spacing between the opposing side edges of the recesses.

[0052] The third recess 10 and the fourth recess 11 extend laterally with respect to the press surface, the endless web 3 to be laminated, and the supply direction T, and are also considered to be lateral grooves, each of which has a distance U between it and the others, and this distance is shorter than the length of the electrode 5 in the longitudinal direction of the endless web 3. As long as the third recess 10 and the fourth recess 11 in press rolls 1 and 2 are formed in accordance with Figures 1 and 3, the spacing U corresponds to the length of the unfolded arc of the outer surfaces 12 and 13 between the opposing edge surfaces of the third recess 10 and the fourth recess 11.

[0053] Based on the smaller dimensions of the cathode and, consequently, the larger spacing A of the lower cathode electrode 5 in the illustration of Figure 3 compared to the upper anode electrode 5 in the illustration of Figure 3, the third recess 10 and fourth recess 11 of the cathode press roll have a smaller spacing U from each other and are formed to be larger than the third recess 10 and fourth recess 11 of the press roll 2 that abuts the anode side of the endless web 3, in order to cover a larger intermediate space 8.

[0054] As long as the electrode 5 is positioned within the endless web 3 without being cut, i.e., within a single section, the intermediate space 8 and, consequently, the third and fourth recesses 10 and 11 are omitted, and only the first and second recesses are provided. Furthermore, unless a corresponding load reduction on the edge is required here, the first and second recesses on the side edges of the press surface may also be omitted individually or together, and therefore, in this case, only the third and / or fourth recesses 10 and 11 may be provided. Within the endless web 3, as long as intermittent covered endless webs are provided, the intermediate spaces 8 are located between the covered portions, and the first, second, third, and / or fourth recesses 10, 11 are used in this case to reduce the load on the endless web 3 during lamination within the region of the lateral edges of the covered portions.

[0055] Generally, the load on the endless web 3 during lamination within the ridge region of electrode 5 is reduced because the press surface does not come into contact with electrode 5 within these ridge regions due to the recesses.

[0056] Furthermore, the depth, shape, and arrangement of the recesses can be selected and configured in various ways to optimize the pressure distribution.

[0057] The markings for the first, second, third, and fourth recesses are used solely for the purpose of identifying these recesses. If the third and fourth recesses 10 and 11 are realized for the realization of the idea of ​​the invention, it is not necessarily required that the first and second recesses also be realized. In this case, the first recess is realized by the third or fourth recess 10 or 11 according to claim 1. If no third and fourth recesses 10 and 11 are provided, and instead only the first and second recesses are provided on the side edges of the press surface, the same is true in the reverse case. While this application relates to the invention described in the claims, it may also encompass the following other embodiments. 1. A laminating apparatus for a multilayer endless web (3) comprising at least one separator web (4, 6) and at least one electrode (5) for the manufacture of an energy cell, wherein the laminating apparatus is - A press device that laminates a multilayer endless web (3) under the action of pressing force, In the laminating apparatus described above, - The press device has a press surface having at least one recess, The recessed area is, When the recessed portion is subjected to pressing force through the press surface, it covers one of the edges (14, 15, 16, 17) of the electrodes (5, 7). A laminating apparatus characterized by its arrangement. 2. - The press device laminates the multilayer endless web (3) under the introduction of heat. The laminating apparatus according to item 1 above, characterized by the features described above. 3. - The pressing surface is provided with at least one first and second recessed portion, These recesses extend along the longitudinal direction of the endless web (3) and are spaced apart from each other, and this spacing is smaller than the spacing between the edges of the electrodes (5) that extend along the longitudinal direction of the endless web (3). The laminating apparatus according to item 1 above, characterized by the features described above. 4. - Within the endless web (3), multiple electrodes (5) are provided, which are regularly spaced apart from each other. - The press surface is provided with at least one third recess (10) and a fourth recess (11), and, - The fourth recess (11) has a gap (U) with respect to the third recess (10) that is smaller than the length of the electrode (5) in the longitudinal direction of the endless web (3). A laminating apparatus according to any one of the above 1 to 3, characterized by the features described above. 5. - The first recess, the second recess, the third recess (10), and the fourth recess (11) are, These recesses are formed and arranged to complement a single recess, and in the form of this recess, the shape corresponds to the shape of the outer edge of the electrode (5). The laminating apparatus according to the above-mentioned 3 and 4, characterized in that... 6. - The press device is equipped with two press rolls (1, 2) having a circular cross-section. These press rolls are arranged such that there is a gap (S) between the outer surfaces (12, 13) of these press rolls through which the endless web (3) passes. A laminating apparatus according to any one of the above 1 to 5, characterized by the features described above. 7. - The gap (S) has a gap width (SW), and this gap width is smaller than the thickness (D) of the endless web (3). The laminating apparatus according to item 6 above, characterized by the features described above. 8. - The first recess and / or the second recess and / or the third recess (10) and / or the fourth recess (11) are located on a portion of the outer surface (12, 13) of one or both press rolls (1, 2). A laminating apparatus characterized by any one of the above 3 to 5, and the laminating apparatus according to 6 or 7. 9. - The first and second recesses are located on the side edges of the outer surface (12, 13), The laminating apparatus according to item 8 above, characterized by the features described above. 10. - The third recess (10) and the fourth recess (11) are arranged parallel to the rotation axis of the press rolls (1, 2), and, - The third recess (10) and the fourth recess (11) have a distance (U) from each other in the development of the arc length of the outer surface (12, 13), The laminating apparatus according to claim 8 or 9, characterized in that this interval is shorter than the length of the electrodes (5) in the longitudinal direction of the endless web (3). 11. - Press rolls (1, 2) are The rotational axes of these press rolls are arranged so that they are aligned parallel to each other. A laminating apparatus according to any one of the above 6 to 10, characterized by the features described above. 12. - The press device has at least one press belt (20, 21), The press belt is The press belt is positioned so as to contact one of the surfaces of the endless web (3). A laminating apparatus according to any one of the above 1 to 8, characterized by the above. 13. - The recessed portion is located on the surface (18, 19) of the press belt (20, 21). The laminating apparatus according to item 12, characterized by the above. 14. - Two press belts (20, 21) are provided. These press belts The surfaces (18, 19) of these press belts, which are facing each other and oriented toward the endless web (3), are arranged such that a gap (S) is provided between them through which the endless web (3) passes. The laminating apparatus according to 12 or 13, characterized by the above. 15. - The gap width (SW) of the gap (S) is, It is just a little less than the thickness (D) of the endless web (3), The laminating apparatus according to item 14, characterized by the above. 16. - The press device has two pressing surfaces positioned opposite each other, and these pressing surfaces allow the press device to contact different sides of the endless web (3), and - These press surfaces are provided with a first recess and / or a second recess and / or a third recess (10) and / or a fourth recess (11), and - The first recess, second recess, third recess (10) and / or fourth recess (11) of these press surfaces have different spacings and / or different depths and / or different shapes. A laminating apparatus according to any one of the above 1 to 15, characterized by the features described above. 17. - The pressing surface is adjustable in width. A laminating apparatus according to any one of the above 1 to 16, characterized by the features described above. 18. - The pressing surface has a width corresponding to the width of the endless web (3), or a multiple of this width. A laminating apparatus according to any one of the above 1 to 17, characterized by the features described above.

Claims

1. A laminating apparatus for a multilayer endless web (3) comprising at least one separator web (4, 6) and at least one electrode (5) for the manufacture of an energy cell, wherein the laminating apparatus is - A press device that laminates a multilayer endless web (3) under the action of pressing force, In the laminating apparatus described above, - The press device has a press surface having at least one recessed portion, The recessed area is, When the recessed portion is subjected to pressing force through the press surface, it covers one of the edges (14, 15, 16, 17) of the electrodes (5, 7). A laminating apparatus characterized by its arrangement.

2. - The press device laminates the multilayer endless web (3) under the introduction of heat. The laminating apparatus according to feature 1.

3. - The press surface is provided with at least one first and second recessed portion, These recesses extend along the longitudinal direction of the endless web (3) and are spaced apart from each other, and this spacing is smaller than the spacing between the side edges of the electrodes (5) that extend along the longitudinal direction of the endless web (3). The laminating apparatus according to feature 1.

4. - Within the endless web (3), a plurality of electrodes (5) are provided, which are regularly spaced apart from each other. - The press surface is provided with at least one third recess (10) and a fourth recess (11), and, - The fourth recess (11) has a gap (U) with respect to the third recess (10) that is smaller than the length of the electrode (5) in the longitudinal direction of the endless web (3). A laminating apparatus according to any one of features 1 to 3.

5. - The first recess, the second recess, the third recess (10), and the fourth recess (11) are, These recesses are formed and arranged to complement each other into a single recess, and in the form of this recess, the shape corresponds to the shape of the outer edge of the electrode (5). The laminating apparatus according to features 3 and 4.

6. - The press device is equipped with two press rolls (1, 2) having a circular cross-section. These press rolls are arranged such that there is a gap (S) between the outer surfaces (12, 13) of the press rolls through which the endless web (3) passes. A laminating apparatus according to any one of features 1 to 5.

7. - The gap (S) has a gap width (SW), and this gap width is smaller than the thickness (D) of the endless web (3). The laminating apparatus according to feature 6.

8. - The first recess and / or the second recess and / or the third recess (10) and / or the fourth recess (11) are located on a portion of the outer surface (12, 13) of one or both of the press rolls (1, 2). A laminating apparatus according to any one of features 3 to 5, and the laminating apparatus according to 6 or 7.

9. - The first recess and the second recess are located on the side edges of the outer surface (12, 13), The laminating apparatus according to feature 8.

10. - The third recess (10) and the fourth recess (11) are arranged parallel to the rotation axis of the press rolls (1, 2), and - The third recess (10) and the fourth recess (11) have a distance (U) from each other in the development of the arc length of the outer surface (12, 13), The laminating apparatus according to claim 8 or 9, characterized in that this interval is shorter than the length of the electrodes (5) in the longitudinal direction of the endless web (3).

11. - The press rolls (1, 2) are The rotational axes of these press rolls are arranged so that they are aligned parallel to each other. The laminating apparatus according to any one of features 6 to 10.

12. - The press device has at least one press belt (20, 21), The press belt is The press belt is positioned so as to contact one of the surfaces of the endless web (3). A laminating apparatus according to any one of features 1 to 8.

13. - The recessed portion is located on the surface (18, 19) of the press belt (20, 21). The laminating apparatus according to feature 12.

14. - Two press belts (20, 21) are provided. These press belts The press belts are positioned opposite each other and are oriented toward the endless web (3), with a gap (S) provided between them through which the endless web (3) passes. The laminating apparatus according to claim 12 or 13.

15. - The gap width (SW) of the gap (S) is, It is just a little less than the thickness (D) of the endless web (3), The laminating apparatus according to feature 14.

16. - The press device has two pressing surfaces positioned opposite each other, and these pressing surfaces allow the press device to contact different sides of the endless web (3), and - These press surfaces are provided with a first recess and / or a second recess and / or a third recess (10) and / or a fourth recess (11), and - The first recess, second recess, third recess (10) and / or fourth recess (11) of these press surfaces have different spacings, and / or different depths, and / or different shapes. A laminating apparatus according to any one of features 1 to 15.

17. - The pressing surface is adjustable in width. A laminating apparatus according to any one of features 1 to 16.

18. - The pressing surface has a width corresponding to the width of the endless web (3), or a multiple of this width. A laminating apparatus according to any one of features 1 to 17.

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