Laminating device for laminating multilayer continuous web for producing energy cells

Abstract

The invention relates to a lamination device for a multilayer continuous web (3) for producing energy cells, consisting of at least one separating web (4, 6) and at least one electrode, having a pressing device which laminates the multilayer continuous web (3) under pressure, wherein the pressing device has two pressing surfaces (24, 25), by means of which the pressing device is in contact with different sides of the continuous web (3), and the pressing surfaces (24, 25) are conditioned differently.

Description

Technical Field

[0001] The invention relates to a laminating device for laminating multilayer continuous webs for producing energy cells having the features of the preamble of claim 1 . Background Art

[0002] Energy cells or also energy storage devices in the sense of the present invention are used, for example, in motor vehicles, other land vehicles, ships, aircraft, or also in stationary installations, such as photovoltaic solar power plants (photovoltaikanlagen) in the form of battery cells or fuel cells, in which extremely large amounts of energy must be stored over longer periods of time.

[0003] For this purpose, such an energy cell can have a structure consisting of a plurality of segments stacked in a stack. The segments each consist of alternating anode sheets and cathode sheets which are separated by separator sheets which are also produced as segments. Separated from each other. The segments are pre-cut during the manufacturing process and are then stacked in a predetermined order and connected to each other by lamination. In this case, the anode and cathode sheets are first cut out of the continuous web and then placed separately and spaced apart on the continuous web of the separator material. Then, in a second step, the subsequently formed "double-layer" continuous web (which is composed of the separator material with the anode or cathode sheets placed thereon) is cut again into segments using a cutting device, wherein in this case, the segments are formed in double layers by the separator sheets together with the anode or cathode sheets arranged thereon. If this is feasible or necessary in terms of manufacturing technology, before cutting, the continuous webs of the separator material with the anode and cathode sheets placed thereon can also be stacked on each other to form a continuous web having a first continuous layer of the separator material (which has the anode or cathode sheets placed thereon) and a second continuous layer of the separator material (which also has the anode or cathode sheets placed thereon). This "four-layer" continuous web is then cut into segments using a cutting device, in which case these segments are formed in four layers by a first separator, an anode sheet, a second separator and a cathode sheet resting thereon. The advantage of this solution is that one cutting operation can be saved. In addition, the cut electrodes can be placed on a continuous separator web (Separatorbahn) and stacked into a three-layer continuous web through another continuous separator web, from which three-layer segments having a separator, an electrode sheet and another separator are then cut. Therefore, a segment in the sense of the present invention is a single-layer segment of a separator material, anode material or cathode material, or also a double-layer, three-layer or four-layer segment of the above structure.

[0004] Furthermore, the above-mentioned "two-layer" or "four-layer" continuous web can be supplemented into a "three-layer" or "five-layer" continuous web by placing another separating web on the electrode, and these "three-layer" or "five-layer" continuous webs then have a separating web on each side.

[0005] Alternatively, the electrodes can also be present as a continuous web, i.e. in an uncut form in a "two-layer", "three-layer", "four-layer" or "five-layer" continuous web, which is then cut into significantly longer lengths and then, for example, wound up. Alternatively, the continuous web can also be wound up first and then cut after the winding is completed. In this case, the electrodes in the continuous web are not present in the form of spaced-apart segments, but instead in the form of a single segment extending without interruption in the intermediate space between the separating webs.

[0006] Furthermore, electrodes in the form of copper webs or copper foils or similar carrier materials with intermittent coatings can also be provided in the continuous web, wherein the coatings each form segmented, spaced-apart elevations in the electrode.

[0007] In order to laminate "double-layer", "triple-layer", "quadruple-layer" or "quintuple-layer" continuous webs, these are guided between two pressing devices, which exert pressure on the continuous webs. In this case, the electrodes and the separating webs are pressed together in these continuous webs. In principle, the electrodes and the separating webs are connected to each other and laminated together by means of the pressing device by applying pressure. In addition, the lamination can also be assisted by the heat generated by the pressure. In addition, other heating areas or cooling areas can also be provided, which control the temperature of the continuous web during lamination. In order to achieve a high-quality connection, it is desirable that the continuous web is subjected to pressure that is as equal as possible in its longitudinal extension and transverse extension.

[0008] There is a problem here that the electrodes and the separator material consist of materials with different coefficients of thermal expansion, so that the laminated continuous web and / or the sections cut therefrom are subsequently curved and / or may have a wavy shape. Summary of the invention

[0009] Against this background, the object of the present invention is to provide a laminating device which enables lamination of continuous webs and sections cut therefrom with minimal undulations and bends.

[0010] To achieve this object, according to the invention a laminating device is proposed having the features of claim 1. Further preferred developments can be gathered from the dependent claims, the drawings and the associated description.

[0011] According to the basic idea of ​​the invention, it is proposed according to claim 1 that the press device has two press surfaces, with which the press device is in contact with different sides of the endless web and the press surfaces are differently temperature-controlled.

[0012] By different temperature control of the pressing surfaces, the heat input into the two different surfaces of the continuous web during lamination can be designed differently. Thus, the different deformations of the continuous web caused by temperature control can be at least reduced in the following way, that is, the continuous web is intentionally heated or even cooled to a lesser extent on the side with greater expansion caused by temperature control. Alternatively, the side of the continuous web with less expansion caused by temperature control can also be intentionally heated more strongly. It is only important that the continuous web is laminated with a temperature gradient between the two surfaces, which is opposite to the different expansion caused by temperature control of the continuous web at its two surfaces. Additionally or alternatively, the pressing surfaces can also be configured so that they are respectively temperature controlled differently, that is, have hotter areas and colder areas, so that the different thermal expansion caused by different thermal expansion coefficients of the continuous web at the surface extending along its longitudinal direction can be compensated. Furthermore, the lamination of the continuous web itself can be adjusted along the continuous web, for example by heating the areas of the continuous web which require greater heat for optimal lamination more intensively than those areas which can already be laminated sufficiently well at a lower temperature. Furthermore, it is thereby possible to intentionally not heat or to heat to a lesser extent those areas of the continuous web for which excessive heat is disadvantageous during lamination. As a result, the solution according to the invention makes it possible to laminate the continuous web with less wave formation or curvature. Furthermore, by means of individual temperature control of the pressing surfaces, the lamination of the continuous web can be adapted to different coefficients of thermal expansion within the surface and to different conditions for the lamination itself, so that a lamination of the continuous web can be achieved with a significantly more uniform connection of the separating web and the electrodes.

[0013] Furthermore, it is proposed that a plurality of electrodes are arranged regularly spaced apart from one another in the continuous web. Since the electrodes are arranged spaced apart, the continuous web has different coefficients of thermal expansion in the direction of its surface and in particular in the direction of its longitudinal extension in the transport direction, so that the problem of different thermal expansion is particularly great here, and the advantages according to the invention are significantly manifested.

[0014] Furthermore, it is proposed that the continuous web has at least two separating webs, and that the electrodes are formed by a plurality of anodes arranged in series and a plurality of cathodes arranged in series, which are separated from one another by one of the separating webs, wherein the pressing surface in contact with the side of the continuous web associated with the cathode has a lower temperature than the pressing surface in contact with the side of the continuous web associated with the anode. The proposed further development makes it possible to laminate the continuous web with a lower heat input into the cathode side, so that a greater thermal expansion of the cathode can be at least partially compensated and the cathode side of the continuous web ideally deforms as a result of the heat to the same extent as the anode side of the continuous web.

[0015] The cathode usually has a conductor foil made of aluminum or an aluminum alloy. In contrast, the anode usually has a conductor foil made of copper or a copper alloy. The thermal expansion coefficient of aluminum or an aluminum alloy is in principle greater than that of copper or a copper alloy, which increases the thermal expansion of the cathode relative to the anode.

[0016] It has proven to be advantageous if the pressing surface has a temperature of -40 to 150 degrees Celsius, preferably 55 to 80 degrees Celsius, wherein the pressing surface preferably has a temperature difference of 20 to 60 degrees Celsius, preferably 35-45 degrees Celsius. This makes it possible to compensate for different thermal expansions when using copper (Cu) and aluminum (Al).

[0017] Furthermore, it is proposed that individually temperature-adjustable heating or cooling sections are provided in the press surfaces. The temperature of the press surfaces can be individually and / or locally varied by means of the heating or cooling sections, whereby the temperature gradient between two press surfaces and / or along the respective press surfaces can be individually varied. The temperature gradient is adjusted in a targeted manner in such a way that different temperature expansions of the continuous web at its different surfaces and / or along the respective surfaces are taken into account.

[0018] Furthermore, the pressing surfaces can also have different thermal conductivities. Thus, a central or identical heat source or heat sink can be used and the different temperatures of the pressing surfaces are achieved by different heat conductions due to the different thermal conductivities of the pressing surfaces. Thus, the pressing surfaces have different thermal conductivities.

[0019] Furthermore, the press surfaces can also have different heat capacities, so that different temperatures of the press surfaces are brought about by the heat introduced, since the heat is stored in different ways.

[0020] Furthermore, it is proposed that the pressing device comprises two pressing rollers with circular cross-sections, and the pressing surface is formed by the side surfaces of the pressing rollers. By configuring the pressing device of the laminating device as a pressing roller, the laminating device can be integrated particularly easily into a cylinder operation which is characterized by a particularly high production capacity and / or transport speed of the continuous web.

[0021] Furthermore, it is proposed that the pressure rollers are arranged such that a gap is provided between their sides, through which the continuous web extends, wherein the gap has a gap width which is smaller than the thickness of the continuous web. With the proposed solution, the continuous web can be compressed simply by arranging the pressure rollers for lamination. An additional feed movement of the pressure rollers can thus be omitted.

[0022] The pressure roller is preferably cylindrically designed with the same diameter in the direction of its longitudinal axis. The pressure roller is thus designed such that its side faces are circular in a plane extending perpendicularly to the axis of rotation and are oriented parallel to the axis of rotation in its longitudinal extension in the direction of the axis of rotation. Thus, a gap is formed between the two side faces, which gap has a gap width that is constant in its longitudinal extension and is independent of the rotational angular position of the pressure roller.

[0023] In this case, by arranging the pressure rollers so that their axes of rotation are oriented parallel to one another, a particularly simple structure of the laminating device is achieved. Due to the parallel arrangement of the axes of rotation, the pressure rollers can be coupled particularly easily to corresponding individual drives, which can be mounted, for example, on a common frame. Furthermore, the pressure rollers can thus also be coupled particularly easily via a transmission, for example in the form of a gear transmission with a plurality of gears arranged relative to one another in one plane.

[0024] Furthermore, it is proposed that the pressing device has at least one pressing belt, and the pressing surface is formed by the surface of the pressing belt that contacts one of the surfaces of the continuous web. The pressing force acting on the continuous web can be made uniform by the pressing belt. Here, the pressing belt can preferably have the same or greater width transverse to the transport direction of the continuous web, so that the continuous web is subjected to the pressing force over its entire width and is thus laminated. The pressing belt can be designed to generate pressure itself or to be applied with pressure by a separate pressure generating device (such as, for example, a pressure roller). In the latter case, the pressure is further transferred from the pressing belt to the continuous web. The pressing belt itself can be designed in the form of a flexible fiber-reinforced textile belt, a steel belt or a very precise endless chain (Gliederkette). The pressing belt can be designed as a driven continuous belt or as a fixed pressing belt with a friction-reduced surface. If the pressing belt is designed as a driven continuous belt, it can also be used to transport the continuous web in addition. On the contrary, if the pressing belt is composed of a fixed pressing belt, additional devices are required to transport the continuous web. In this case, the continuous web is actively pulled past the press belt.

[0025] Furthermore, it is proposed that at least two pressing belts are provided, each with a pressing surface. The total pressing surface can be increased by a plurality of pressing belts. If the pressing belts are arranged in a row, the length of the pressing surface can thereby be increased, while if the pressing belts are arranged in parallel, the width of the pressing surface can be increased. Furthermore, by arranging the pressing belts opposite each other at a distance, a gap can be formed through which the continuous web can be guided for lamination. In this case, the continuous web can be compressed from both sides, so that the continuous web is laminated at its two surfaces.

[0026] If the pressing device has pressing rollers, it is further proposed that these pressing rollers are against the free surface of the pressing belt and press the pressing belt against the continuous web when applying pressure. In this case, the pressing rollers constitute the pressure generating device of the pressing device, which presses the pressing belt against the continuous web.

[0027] Furthermore, it is proposed that the pressing surface is adjustable in width. By virtue of the width adjustability of the pressing surface, the laminating device can be adjusted to laminate continuous webs of different widths. The width of the pressing surface is here understood to mean a direction in the plane of the continuous web perpendicular to the longitudinal direction of the continuous web.

[0028] Furthermore, the pressing surface can preferably have a width which corresponds to the width of the continuous web or to a multiple thereof. With the proposed solution, the laminating device can be specially designed for laminating continuous webs of a certain width or also for laminating a plurality of continuous webs of a certain width arranged in parallel. If the pressing surface is adjustable, a predetermined position of the width of the pressing surface can also be preset for this purpose, so that the pressing surface can be adjusted at low cost from a position for laminating a single continuous web to a position for two or more continuous webs arranged in parallel. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The present invention will be explained below with reference to the accompanying drawings using preferred embodiments.

[0030] Figure 1 shows an excerpt from a laminating device having four layers of continuous webs and a pressing device with two pressing rollers; and

[0031] Figure 2 A detail of a laminating device is shown, which has a three-layer continuous web and a pressing device with two press rollers and two press belts. DETAILED DESCRIPTION

[0032] exist Figure 1, a section of a laminating device according to the invention can be seen, wherein the continuous web 3 is composed of a "four-layer" continuous web 3, which has: a separating web 4 on the upper side and a separating web 6 in the middle, a plurality of anodes 5 arranged between the separating webs 4 and 6, and a plurality of cathodes 7 arranged below the separating web 6 in the middle. The anodes 5 are designed to be larger than the cathodes 7, so that the anodes 5 have a smaller end surface distance A from each other when arranged in pairs with the cathodes 7 than the cathodes 7. The laminating device also includes a pressing device with two pressing rollers 1 and 2, which are designed as cylindrical rollers with a circular cross section. The pressing rollers 1 and 2 are oriented parallel to each other with their rotation axes and are arranged so that there is a gap S between their side faces 12 and 13, which has a constant gap width SW in the direction of the rotation axis (i.e., perpendicular to the plane of the illustration).

[0033] The gap width SW of the gap S is dimensioned to be smaller than the thickness D of the continuous web 3, so that the continuous web 3 is slightly compressed and laminated when passing through the gap S. The thickness D2 of the separating webs 4 and 6 is 15 to 25 μm, respectively, while the anode 5 and the cathode 7 have a thickness D1 of 150 to 400 μm. Thus, a thickness D of the continuous web 3 of about 330 μm to 850 μm is obtained. The gap width SW is dimensioned to be 20 to 100 μm, preferably 40 to 60 μm, smaller than the thickness D of the continuous web 3, so that the continuous web 3 is slightly compressed when passing through the gap. The intermediate space 8 is formed by the spacing of the anode 5 and the cathode 7 and has a height corresponding to the thickness D1 of the anode 5 and the cathode 7, namely 150 to 400 μm. Furthermore, the intermediate space 8 has a length in the transport direction which corresponds to the distance A of the electrodes 5: 3 mm between the anodes and 6 mm between the cathodes, wherein it is desirable that the distance A between the electrodes 5 is dimensioned to be as small as possible in order to increase the material utilization of the continuous web 3 and the number of electrodes 5 within a predetermined length of the continuous web 3.

[0034] The continuous web 3 is fed in the feed direction T and is pulled through the gap S. The pressure rollers 1 and 2 can themselves be actively driven, for example by separate drives in the form of servomotors, to perform counter-rotational movements directed in the arrow direction P, so that they additionally actively transport the continuous web 3 by friction locking. Alternatively, however, the pressure rollers 1 and 2 can also be arranged only in a rotatable manner, so that they themselves are driven by the continuous web 3 to perform rotational movements by friction locking. In this case, the pressure rollers 1 and 2 only passively roll on the surface of the continuous web 3. Due to the passive rolling movement of the pressure rollers 1 and 2, their movement is synchronized with the movement of the continuous web 3.

[0035] The upper press roller 2 lies with its side surface 12 on the upper side of the separating web 4 and thus forms an upper pressing surface 24. The lower press roller 1 lies with its side surface 13 on the surface of the cathode 7, so that the side surface 13 in this case forms a lower pressing surface 25 opposite the upper pressing surface 24. Therefore, the press rollers 1 and 2 lie with their pressing surfaces 24 and 25 formed by the side surfaces 12 and 13 on the free surface of the continuous web 3 and, when the continuous web 3 passes through the gap S, the press rollers exert pressure on the continuous web 3 from both sides, which causes the continuous web 3 to be laminated, since the gap width SW is smaller than the thickness D of the continuous web 3.

[0036] exist Figure 2 An alternative embodiment of the invention can be seen in FIG. Here, in addition to the two press rollers 1 and 2, the press device also comprises two press belts 20 and 21, which are in contact with the top and bottom of the continuous web 3. The press rollers 1 and 2 are designed and arranged in this case to Figure 1 The press rollers 1 and 2 are identical and differ only in that they do not rest directly on the continuous web 3 to be laminated, but instead on the free surfaces of the press belts 20 and 21, which in turn rest on the continuous web 3. The press surfaces 24 and 25 are therefore formed by the surfaces of the press belts 20 and 21 facing the continuous web 3. The gap S is therefore formed by the intermediate space between the two press surfaces 24 and 25 of the press belts, and the gap width SW corresponds to the distance between the two press surfaces 24 and 25. The press belts 20 and 21 are dimensioned so that the gap width SW is smaller than the thickness of the continuous web D. In this case, the thickness D of the continuous web 3 is 180 to 450 μm. This is in contrast to Figure 2 The representation does not correspond to Figure 2 , for better visibility, the gap width SW is shown to be greater than the thickness D of the continuous web 3. However, in order to laminate the continuous web 3, the pressing belts 20 and 21 must bear against the surface of the continuous web 3 under pressure, so that the gap width SW must be dimensioned to be smaller than the thickness D of the continuous web 3. To this end, the pressing rollers 1 and 2 can additionally press the pressing belts 20 and 21 against the continuous web 3 and thus increase the pressure exerted by the pressing belts 20 and 21.

[0037] Furthermore, a continuous web 3 to be laminated is provided, which extends through the gap S and has a thickness D. The continuous web 3 consists of a "three-layer" continuous web 3 having a separating web 4 on the upper side and a separating web 6 on the lower side and an anode 5 arranged therebetween. The anodes 5 are arranged at equal distances A from one another via intermediate spaces 8 and have a smaller width than the separating webs 4 and 6, so that the separating webs 4 and 6 protrude laterally beyond the anode 5.

[0038] exist Figure 1 In the two pressing surfaces 23 and 24 of the pressing rollers 1 and 2 in the embodiment of the present invention, or in Figure 2 In the embodiment of the present invention, a plurality of cooling or heating sections 23 are provided on the two pressing surfaces 23 and 24 of the pressing belts 20 and 21. These cooling or heating sections can be controlled individually or in groups and can achieve different temperature controls on the pressing surfaces 24 and 25 of the pressing rollers 1 and 2 or the pressing belts 20 and 21.

[0039] Thus, the upper pressing roller 2 or upper pressing belt 21 in contact with the upper separating web 4 covering the anode 5 (i.e., the anode side of the continuous web 3) may have a temperature of 50 degrees Celsius in its pressing surface 24, while the lower pressing roller 2 or lower pressing belt 20 in contact with the lower side of the cathode 7 (i.e., the cathode side of the continuous web 3) has a temperature of 20 degrees Celsius in its pressing surface 23. Thus, the pressing surfaces 24 and 25 have a temperature difference of 30 degrees Celsius, wherein the pressing surface 23 on the anode side intentionally has a higher temperature and thus the continuous web 3 at the anode side is heated to a greater extent than the pressing surface 24 at the cathode side of the continuous web 3.

[0040] By controlling or adjusting the temperature of the cooling or heating section 23, the temperature gradient between the pressing surfaces 24 and 25 can be controlled or adjusted so that the temperature gradient can be adapted to different anodes and cathodes and in particular to different combinations thereof. For example, the thickness of the conductor foil of the anode, which can usually be made of copper, and the cathode, which can usually be made of aluminum, is adjusted, which adapts the overall thickness of the anode and cathode and the materials of the anode and cathode, the conductor foil and the active material. In the present embodiment, a cooling or heating section 23 is arranged in both pressing surfaces 25 and 24, so that a temperature difference between the pressing surfaces 25 and 24 can be achieved by actively changing the temperature of the two pressing surfaces 25 and 24. However, in order to achieve this temperature difference, it is also conceivable to provide a cooling or heating section 23 only in one of the pressing surfaces 24 or 25, and to heat or cool only one of the pressing surfaces 24 or 25 accordingly.

[0041] Furthermore, a plurality of cooling or heating sections 23 arranged at a distance from one another and individually controllable can also be provided in the pressing surfaces 24 and 25, so that the pressing surfaces 24 and 25 can also have different temperatures within themselves only in sections. In this way, for example, different thermal expansions of the continuous web 3 in the direction of its longitudinal extension on the anode side and / or the cathode side can be taken into account. Thus, the thermal expansion of the continuous web 3, for example, in the region of the anode 5 and the intermediate space 8 arranged therebetween differs from the thermal expansion in the region of the cathode 7 and the intermediate space 8 arranged therebetween, which is also caused in particular by the fact that the distance A of the cathode 7 is greater and the distance A of the anode 5 is smaller in the intermediate space 8. By means of the cooling or heating sections 23, the pressing surfaces 24 and 25 can, for example, be heated to a lesser extent in sections with which the pressing surfaces are in contact with sections of the continuous web 3 with greater thermal expansion in the central region of the anode 5 and the central region of the cathode 7 than in sections with which the pressing surfaces are in contact in the region of the intermediate space 8. Thus, for the pressing surfaces 24 and 25, different temperatures are obtained along their longitudinal extension and / or development in the form of a regular alternation of higher temperature areas and lower temperature areas. The length of the area with the lower temperature depends on the length of the anode 5 and the length of the cathode 7, while the length of the area with the higher temperature depends on the length of the intermediate space 8. Thus, for the lamination of the continuous web 3, different temperature areas are generated in the respective pressing surfaces 24 and 25, which are present in a distribution and dimensioning that is individually adapted to the respective distribution of the thermal expansion in the anode side and / or cathode side of the continuous web 5.

[0042] Furthermore, by arranging and controlling the individual cooling or heating sections 23, the pressing surfaces 24 and 25 can also be differently temperature-controlled in the edge sections with which they are in contact with edge sections of the continuous web 3, which are laterally adjacent to the anode 5 and the cathode 7 and extend in the longitudinal direction of the continuous web 3. In general, the pressing surfaces 24 and 25 of the press rollers 1 and 2 and / or the press belts 20 and 21 can be individually temperature-controlled by arranging the cooling or heating sections 23, so that the lamination of the continuous web 3 is carried out with a heat distribution in the pressing surfaces 24 and 25 that is individually coordinated with a specific distribution of thermal expansion in the continuous web 3, whereby in an ideal case a laminated, non-bending continuous web 3 can be achieved after leaving the laminating device.

[0043] Of course, press belts 20 and 21 having press surfaces 24 and 25 with different temperatures can also be combined with press rollers 1 and 2 having press surfaces 24 and 25 with different temperatures.

[0044] The cooling or heating sections 23 in the pressing surfaces 24 and 25 are preferably integrated into the pressing surfaces 24 and 25 in such a way that the pressing surfaces 24 and 25 are formed uniformly and without steps.

[0045] Furthermore, in addition to or instead of the cooling or heating sections 23 in the press surfaces 24 and 25, regions with different thermal conductivity can also be provided in the press surfaces 24 and 25. In this case, the press belts 20 and 21 and / or the press rollers 1 and 2 can be equipped with a central heat source or heat sink, which, in combination with the regions with different thermal conductivity, results in different temperature control of the press surfaces 24 and 25.

Claims

1. A laminating device for producing a multilayer continuous web (3) for producing an energy cell, the multilayer continuous web consisting of at least one separating web (4, 6) and at least one electrode, the laminating device comprising: - a pressing device which laminates the multilayer continuous web (3) under pressure, It is characterized in that the pressing device has two pressing surfaces (24, 25) with which the pressing device comes into contact with different sides of the continuous web (3), and The pressing surfaces (24, 25) are temperature-controlled differently.

2. The laminating device according to claim 1, characterized in that A plurality of electrodes are arranged in a regularly spaced relationship from one another in the continuous web (3).

3. The laminating device according to claim 2, characterized in that - the continuous web (3) has at least two separating webs (4, 6), and The electrodes are formed by a plurality of anodes (5) arranged in series and a plurality of cathodes (7) arranged in series, which are separated from one another by one of the separating webs (4, 6), wherein The pressing surface (24, 25) in contact with the side of the continuous web (3) associated with the cathode (7) has a lower temperature than the pressing surface (24, 25) in contact with the side of the continuous web (3) associated with the anode (5).

4. The laminating device according to any one of claims 1 to 3, characterized in that The pressing surfaces (24, 25) have a temperature of -40 to 150 degrees Celsius, preferably a temperature of 55 to 80 degrees Celsius.

5. The laminating device according to any one of claims 1 to 4, characterized in that - The pressing surfaces (24, 25) have a temperature difference of 20 to 60 degrees Celsius.

6. The laminating device according to any one of claims 1 to 5, characterized in that - Individually temperature-controllable heating sections (23) or cooling sections are provided in the pressing surfaces (24, 25).

7. The laminating device according to any one of claims 1 to 6, characterized in that The pressing surfaces (24, 25) have different thermal conductivities.

8. The laminating device according to any one of claims 1 to 7, characterized in that The pressing surfaces (24, 25) have different thermal capacities.

9. The laminating device according to any one of claims 1 to 8, characterized in that - the pressing device comprises two pressing rollers (1, 2) with a circular cross section, and The pressing surfaces (24, 25) are formed by the side surfaces (12, 13) of the pressing rollers.

10. The laminating device according to claim 9, characterized in that The press rollers (1, 2) are arranged such that a gap (S) is provided between their side faces (12, 13), through which gap the continuous web (3) extends, wherein The gap (S) has a gap width (SW) which is smaller than the thickness (D) of the continuous web (3).

11. The laminating device according to any one of claims 9 or 10, characterized in that The pressure rollers (1, 2) are cylindrically designed with the same diameter in the direction of their longitudinal axis.

12. Laminating device according to any one of claims 9 to 11, characterized in that The pressure rollers (1, 2) are arranged such that their axes of rotation are oriented parallel to one another.

13. Laminating device according to any one of claims 1 to 12, characterized in that - the pressing device has at least one pressing belt (20, 21), and The pressing surface (24, 25) is formed by the surface of the pressing belt (20, 21) which is in contact with one of the surfaces of the continuous web (3).

14. The laminating device according to claim 13, characterized in that At least two pressing belts (20, 21) are provided, each having a pressing surface (24, 25).

15. Laminating device according to any one of claims 9 to 12 and any one of claims 13 or 14, characterized in that The pressure rollers (1, 2) bear against the free surfaces of the pressure belts (20, 21) and, under application of pressure, press the pressure belts (20, 21) against the continuous web (3).

16. Laminating device according to any one of claims 1 to 15, characterized in that The pressing surfaces (24, 25) are adjustable in width.

17. Laminating apparatus according to any one of claims 1 to 16, characterized in that The pressing surfaces (24, 25) have a width which corresponds to the width of the continuous web (3) or to a multiple thereof.

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