Apparatus and method for manufacturing electrodes

Abstract

To provide a method and / or apparatus for manufacturing an electrode with a substrate and with a dry film.SOLUTION: The disclosure relates to a method for manufacturing an electrode 4 with a substrate 30 and with a first dry film 22, wherein to form the first dry film 22, solvent-free dry film material is brought into a first roller gap 18 formed between a first roller 6 and a second roller 8. The first dry film 22 formed in the first roller gap 18 is roller-conveyed into a second roller gap 24 formed between the second roller 8 and a third roller 10 and compressed in the second roller gap 24. For laminating, the compressed first dry film 22 and the substrate 30 are conveyed into a third roller gap 26 formed between the third roller 10 and a fourth roller 12, where the first dry film 22 is roller-conveyed into the third roller gap 26.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to an apparatus and method for manufacturing an electrode that includes a substrate and a dry film layer that includes an active material. [Background technology]

[0002] To manufacture an electrode having a substrate and a dry film, as is known, for example, from WO 2018 / 210723, a dry film material is first conveyed between two rolls of a roller device by a powder conveying device. Compressive and / or shear forces are applied to the dry film by the rollers, resulting in the formation of a dry film. The dry film is then conveyed over one of the rollers to another gap. A substrate is then passed through the gap, resulting in the dry film being laminated to the substrate.

[0003] In the case of such a manufacturing method, the dry film has a relatively low density, which is a disadvantage for the energy density and / or power density when used directly in a car battery. For this reason, recompression of the dry film is carried out, for example, during lamination of the dry film to a substrate. However, there is a risk of wrinkles occurring in the extraction area of ​​the substrate and / or of cracks in the substrate due to non-uniformity. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] International Publication No. 2018 / 210723 Summary of the Invention [Problem to be solved by the invention]

[0005] The object of the present invention is to provide a method and / or an apparatus that are particularly suitable for manufacturing an electrode having a substrate and a dry film, in particular when the manufactured electrode must have a relatively high density dry film and / or when recompression during lamination must be avoided. [Means for solving the problem]

[0006] According to the invention, the problem relating to the method is solved by the features of claim 1. According to the invention, the problem relating to the device is solved by the features of claim 9. Preferred and further features are set out in the dependent claims, where the features relating to the device equally apply to the method and vice versa.

[0007] The present invention relates to a method for producing an electrode, in particular for a lithium-ion battery, comprising a substrate, in particular a film-like substrate such as a metal film, and a first dry film, which is arranged on a first side of the substrate, in particular joined to the substrate, in particular laminated on the substrate. Preferably, the substrate constitutes a current collector of the electrode. Preferably, the dry film forms a layer containing an active material, in particular intended for the anode or cathode of a lithium-ion battery.

[0008] According to the method, in a first step for forming a first dry film, a solvent-free dry film material is conveyed, in particular transported, to a first roller gap formed between a first roller and a second roller, where the dry film material is processed into a first dry film by the first roller and the second roller, and thus compressive and / or shear forces are applied to the dry film material by the first roller and the second roller, resulting in particles of the dry film material bonding together.

[0009] In this case, the dry film material is preferably a particulate material, also called granules, such as a powder or a powder mixture. In this case, the dry film material comprises a (dry) active material, a (dry) binder, and / or a (dry) conductive material. In other words, the dry film material comprises a mixture of solvent-free active material particles, solvent-free binder particles, and / or solvent-free conductive material particles.

[0010] In a second step, the first dry film formed in the first roller gap is transported to a second roller gap formed between the second roller and the third roller. In other words, the first dry film is transported from the first roller gap to the second roller gap by the second roller. In this case, the first dry film is not floating but is disposed on the second roller for transport from the first roller gap to the second roller gap, and is particularly supported and therefore entrained by the second roller.

[0011] The first dry film is compressed in the second roller gap by the second roller and the third roller. Preferably, the first dry film is compressed to a predetermined target density or a predetermined target thickness. In this case, the target density or target thickness is, in particular, the density or thickness that the dry film material must have after the electrode is manufactured, i.e., when the electrode is mounted in a battery cell, in particular a lithium-ion battery cell. Therefore, the target density or target thickness is advantageously selected so that further compression of the dry film is not necessary, and preferably is not performed. Therefore, it is not necessary to recompress the first dry film against the substrate during lamination (corresponding to step 3). Instead, a relatively small linear load is used. As a result, the risk of damage to the first dry film and / or the substrate during recompression is advantageously avoided.

[0012] In summary, the second method step is used to compress the first dry film.

[0013] In a third step of the method, the compressed first dry film and the substrate are transported to a third roller gap formed between a third roller and a fourth roller. In this case, the first dry film is transported to the third roller gap by the third roller. Preferably, the substrate is transported to the third roller gap between the first dry film, which is being transported by the third roller, and the fourth roller. In this third roller gap, the substrate and the compressed first dry film are laminated together. In this case, the line load is selected so that the first dry film is reliably, i.e., problem-freely, bonded to the substrate. For example, in the third roller gap, the dry film is compressed again, but a relatively small line load is used to avoid cracks or wrinkles. In particular, a line load greater than the line load required for the lamination is not used. For example, the line load for forming the film in the first gap is 200N / mm to 2000N / mm, the line load for compressing in the second gap is 500N / mm to 4000N / mm, and / or the line load for lamination is 200N / mm to 2000N / mm.

[0014] Because the first dry film is conveyed by rollers both from the first roller gap to the second roller gap and from the second roller gap to the third roller gap, it is advantageously possible to manufacture the first dry film relatively thin and / or to reduce the proportion of binder, thereby reducing the requirements for mechanical stability of the first dry film compared to manufacturing the first dry film as a floating dry film, i.e., compared to manufacturing the first dry film in a floating state and conveyed without any support.

[0015] In accordance with a preferred configuration of the method, the substrate has a second dry film on a second side of the substrate.

[0016] For this purpose, according to the first variation, similar to the first step of the method, the solvent-free dry film material is conveyed, in particular conveyed, to a fourth roller gap formed between a fifth roller and a sixth roller. In this case, the dry film material conveyed to the first roller gap is processed into a second dry film by the fifth roller and the sixth roller. For example, the same dry film material as the first dry film may be used for the second dry film, or alternatively, a different dry film material may be used.

[0017] Subsequently, as in the second step of the method, the second dry film formed in the fourth roller gap is conveyed by the sixth roller to the fifth roller gap formed between the sixth roller and the seventh roller. That is, the second dry film is conveyed from the fourth roller gap to the fifth roller gap by the sixth roller. In this case, the second dry film is not floating but is arranged along the sixth roller for conveyance from the fourth roller gap to the fifth roller gap, and is particularly supported and therefore entrained by the sixth roller.

[0018] The second dry film is compressed in the fifth roller gap by the sixth and seventh rollers. Preferably, this second dry film is compressed to a predetermined target density or a predetermined target thickness. In this case, the target density or target thickness for the second dry film is, in particular, the density or thickness that the dry film material must have after the electrode is manufactured, i.e., when the electrode is mounted in a battery cell, particularly a lithium-ion battery cell. Therefore, the target density or target thickness is advantageously selected so that further compression of the second dry film is not necessary, and preferably is not performed. Therefore, it is not necessary to recompress the second dry film against the substrate during lamination. As a result, the risk of damage to the first dry film, the second dry film, and / or the substrate during recompression is advantageously avoided. Alternatively, a relatively small line load is used for weak compression. In summary, for example, in the fifth roller gap, the dry film is compressed again, but a relatively small line load is used to avoid the occurrence of cracks or wrinkles. In particular, a line load greater than the line load required for the lamination is not used.

[0019] The compressed second dry film and the laminated substrate having the first dry film are then transported to a sixth roller gap formed between a seventh roller and an eighth roller. The second dry film is then transported to the sixth roller gap by the seventh roller. Preferably, the second dry film is transported to the sixth roller gap so that the substrate is positioned between the first and second dry films. In the sixth roller gap, the compressed second dry film is laminated onto the second side of the substrate. In this case, the linear load is selected so that the first and second dry films are reliably, i.e., problem-free, bonded to the substrate. Therefore, a larger linear load for further compressing the first or second dry film is not necessary and is advantageously not used.

[0020] For example, the line load for forming the film in the fourth gap is 200N / mm to 2000N / mm, the line load for compressing in the fifth gap is 500N / mm to 4000N / mm, and / or the line load for laminating in the sixth gap is 200N / mm to 2000N / mm.

[0021] In summary, in this first variation, a first dry film is formed by the first roller, the second roller, the third roller, and the fourth roller, and the first dry film is compressed and laminated onto the first side of the substrate. A second dry film is formed by the fifth roller, the sixth roller, the seventh roller, and the eighth roller, and the second dry film is compressed and laminated onto the second side of the substrate having the first dry film.

[0022] In this case, the first to fourth rollers are preferably arranged in a line, i.e., the axes of these rollers are oriented parallel to one another and are arranged in a common first plane. Likewise, the fifth to eighth rollers are preferably arranged in a line, i.e., the axes of these rollers are oriented parallel to one another and are arranged in a common second plane. In this case, the axes of these rollers are particularly parallel and spaced apart or inclined with respect to the first plane. Due to the in-line arrangement of the rollers, warping of these rollers due to the line load is advantageously avoided or at least reduced.

[0023] According to another second variation, similar to the first step of the method, a solvent-free dry film material is conveyed, particularly conveyed, to a fourth roller gap formed between a fifth roller and a sixth roller. In this case, the dry film material conveyed to the first roller gap is processed into a second dry film by the fifth roller and the sixth roller. For example, the same dry film material as the first dry film may be used for the second dry film, or alternatively, a different dry film material may be used.

[0024] Subsequently, as in the second step of the method, the second dry film formed in the fourth roller gap is conveyed by the sixth roller to the fifth roller gap formed between the sixth roller and the seventh roller. That is, the second dry film is conveyed from the fourth roller gap to the fifth roller gap by the sixth roller. In this case, the second dry film is not floating but is arranged along the sixth roller for conveyance from the fourth roller gap to the fifth roller gap, and is particularly supported and therefore entrained by the sixth roller.

[0025] The second dry film is compressed in the fifth roller gap by the sixth roller and the fourth roller. Preferably, the second dry film is compressed to a predetermined target density or a predetermined target thickness. In this case, the target density or target thickness is, in particular, the density or thickness that the dry film material must have after the electrode is manufactured, i.e., when the electrode is mounted in a battery cell, in particular a lithium-ion battery cell. Therefore, the target density or target thickness is advantageously selected so that further compression of the second dry film is not necessary, and preferably is not performed. In this way, it is not necessary to recompress the second dry film against the substrate during lamination. Instead, a relatively small line load is used for weak compression. As a result, the risk of damage to the first dry film and / or the substrate during recompression is advantageously avoided.

[0026] The compressed second dry film, the first dry film, and the substrate are then transported to a third roller gap. The second dry film is then transported to the third roller gap by a fourth roller. Preferably, the second dry film is transported to the third roller gap so that the substrate is disposed between the first and second dry films. In the third roller gap, the compressed first dry film is laminated onto the first side of the substrate, and the compressed second dry film is laminated onto the second side of the substrate. That is, laminating the first dry film and the second dry film onto the substrate is performed together in the third roller gap. In other words, laminating the first dry film is performed together with laminating the second dry film onto the substrate in the third step. In this case, the linear load is selected so that the first dry film and the second dry film are reliably, i.e., problem-free, bonded to the substrate. However, a larger linear load for further compressing the first or second dry film is not necessary and is not advantageously used.

[0027] For example, the line load for forming the film in the fourth gap is 200 N / mm to 2000 N / mm, the line load for compressing in the fifth gap is 500 N / mm to 4000 N / mm, and / or the line load for laminating in the third gap is 200 N / mm to 2000 N / mm.

[0028] In summary, in this second variation, a first dry film is formed by the first roller, the second roller, the third roller, and the fourth roller, and the first dry film is compressed and laminated onto the first side of the substrate. A second dry film is formed by the fifth roller, the sixth roller, the fourth roller, and the third roller, and the second dry film is compressed and laminated onto the second side of the substrate.

[0029] In this case, the first to sixth rollers are preferably arranged in a row, i.e., the axes of the rollers are parallel to one another and lie in a common plane. The roll arrangement is therefore symmetrical. Due to the row arrangement of the rollers, warping of the rollers due to the line load is advantageously avoided or at least reduced.

[0030] To further summarize, in all variations, the first dry film and / or the second dry film are exclusively transported by rollers until lamination with the substrate, and therefore thicknesses and / or densities of the first dry film or the second dry film that are not suitable for free-floating transport, i.e., transport not supported by rollers, due to their low mechanical stability may be achieved.

[0031] In a suitable configuration, the first dry film at the second roller gap and / or the second dry film at the sixth roller gap may each have a 1.0 g / cm 3 ~4g / cm 3 , especially 1.4 g / cm 3 ~3.7g / cm 3 In other words, the first dry film is compressed at the second roller gap and / or the second dry film is compressed at the sixth roller gap, so that the first dry film or the second dry film after the compression has a density of 1.0 g / cm 3 ~4g / cm 3 , especially 1.4 g / cm 3 ~3.7g / cm 3 The material is compressed to have a density of 1000 .mu.m.

[0032] Additionally or alternatively, according to a preferred configuration, the first dry film is compressed at the second roller gap and / or the second dry film is compressed at the sixth roller gap to a thickness of 10 μm to 200 μm, e.g., 30 μm to 150 μm, particularly 40 μm to 120 μm. In other words, the first dry film is compressed at the second roller gap and / or the second dry film is compressed at the sixth roller gap, respectively, so that the first dry film or the second dry film after compression has a thickness of 10 μm to 200 μm, e.g., 30 μm to 150 μm, particularly 40 μm to 120 μm. Therefore, the second roller gap or the sixth roller gap has a corresponding roller gap, preferably a roller gap of 10 μm to 200 μm, e.g., a roller gap of 30 μm to 150 μm, particularly 40 μm to 120 μm.

[0033] In this case, the thickness or density is adapted to the battery cell comprising the electrode depending on the type of electrode, i.e. whether it is an anode or cathode, and / or depending on the planned use of the electrode, in particular depending on the required power density and / or energy density.

[0034] According to a preferred configuration, the peripheral speed of the second roller is set to be greater than the peripheral speed of the first roller. Additionally or alternatively, the peripheral speed of the third roller is set to be greater than the peripheral speed of the second roller. Preferably, the peripheral speeds of the third roller and the fourth roller are equal in value.

[0035] Preferably, in the first and second variations, the peripheral speed of the sixth roller is set to be greater than the peripheral speed of the fifth roller. Additionally or alternatively, in the first variation, the peripheral speed of the seventh roller is set to be greater than the peripheral speed of the sixth roller. Additionally or alternatively, in the second variation, the peripheral speed of the fourth roller is set to be greater than the peripheral speed of the sixth roller.

[0036] Therefore, for example, when the diameters of both rollers in each roller pair (i.e., the first and second rollers, the second and third rollers, the sixth and seventh rollers, or the seventh and eighth rollers) are the same, the angular velocity, i.e., the number of rotations, of the second roller is greater than the angular velocity, i.e., the number of rotations, of the first roller. Furthermore, for example, when the angular velocities of the first and second rollers are the same, the diameter of the second roller is greater than the diameter of the first roller.

[0037] As a result of the higher peripheral speed of one of these rollers in each roller pair, the first dry film or the second dry film can be supported relatively securely on the roller by the higher peripheral speed, and / or the length of the dry film can be maintained, i.e., compensated, during compression.

[0038] For example, the ratio of the peripheral speed, particularly the rotational speed, of the relatively fast rotating roller to the relatively slow rotating roller of each roller pair forming the roller gap is 3:1 to 20:1, particularly 4:1 to 10:1.

[0039] Additionally or alternatively, in a suitable configuration, the temperature of the second roller is set higher than the temperature of the first roller. Additionally or alternatively, the temperature of the third roller is set higher than the temperature of the second roller. Preferably, the temperatures of the third roller and the fourth roller are equal.

[0040] For example, a higher temperature is selected for compression than for lamination, which is a disadvantage for ensuring roller transport, but is beneficial for the compression and / or the lamination.

[0041] Preferably, in the first and second variations, the temperature of the sixth roller is set higher than the temperature of the fifth roller. In the first variation, the temperature of the seventh roller is also or alternatively set higher than the temperature of the sixth roller. In the second variation, the temperature of the fourth roller is also or alternatively set higher than the temperature of the sixth roller.

[0042] For example, the difference in temperature between the relatively low temperature roller and the relatively high temperature roller of each roller pair forming the roller gap is 1 to 50°C, particularly 1 to 20°C, and preferably 5 to 20°C.

[0043] As a result of one of the rollers of each roller pair having a higher temperature, the first dry film or the second dry film is transported relatively reliably on the roller at a higher temperature.

[0044] Additionally or alternatively, according to a preferred configuration, the surface of the second roller has a greater roughness than the surface of the first roller. Additionally or alternatively, the surface of the third roller has a greater roughness than the surface of the second roller.

[0045] Preferably, in the first and second variations, the surface roughness of the sixth roller is greater than that of the fifth roller. In the first variation, also or alternatively, the surface roughness of the seventh roller is greater than that of the sixth roller. In the second variation, also or alternatively, the surface roughness of the fourth roller is greater than that of the sixth roller.

[0046] As a result of one of the rollers of each roller pair having a greater surface roughness, the first dry film or the second dry film is transported relatively reliably on the roller with a greater surface roughness.

[0047] Another aspect of the present invention relates to an apparatus for manufacturing an electrode having a substrate and a first dry film according to the method of any one of the above configurations, the apparatus therefore comprising at least a first roller, a second roller, a third roller, and a fourth roller.

[0048] In this case, a first roller gap is formed between the first roller and the second roller, and the apparatus further comprises a conveying device, for example a so-called hopper, for conveying the solvent-free dry film material to the first roller gap.

[0049] Furthermore, a second roller gap for compressing the first dry film formed in the first roller gap is formed between the second roller and the third roller.

[0050] The apparatus further includes a feeding device for feeding the substrate into a third roller gap formed between the third roller and the fourth roller.

[0051] Preferably, the first, second, third, and fourth rollers are configured such that the first dry film is conveyed from the first roller gap to the second roller gap by the second roller, and the first dry film is conveyed from the second roller to the third roller by the third roller. Therefore, the angular velocity (rotational speed) or temperature of each of these rollers can be individually adjusted. In this case, as described in connection with the method, preferably, the circumferential speed and / or temperature of the second roller is greater than the circumferential speed and / or temperature of the first roller, and / or the temperature of the third roller is greater than the temperature of the second roller. Additionally or alternatively, the surfaces of these rollers have different roughnesses, as described in connection with the method. In this case, in particular, the surface roughness of the second roller is greater than the surface roughness of the first roller, and / or the surface roughness of the third roller is greater than the surface roughness of the second roller.

[0052] Preferably, the first, second, third and fourth rollers are arranged such that their (rotational) axes are oriented parallel to one another and lie in a common plane, so that roll-bending of the rollers is advantageously avoided or at least reduced.

[0053] In a preferred configuration, the line load and / or gap width of the first roller gap, the second roller gap, and / or the third roller gap are individually adjustable, i.e., individually and / or independently of one another. Additionally or alternatively, the gap width is or is adjusted at the first roller gap and / or the second roller gap. Additionally or alternatively, the line load, i.e., the rolling force, is or is adjusted at the third roller gap.

[0054] Thus, in all these cases, a relatively precise adjustment of the gap or line load is required to achieve the various operations of the respective gap (film formation, Compression or lamination) is possible.

[0055] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. [Brief explanation of the drawings]

[0056] [Figure 1] 1 shows an apparatus for manufacturing an electrode in a first embodiment. [Figure 2] 1 shows an apparatus according to a second embodiment. [Figure 3] 10 shows an apparatus according to a third embodiment. [Figure 4] 1 shows a flow chart of a method process for manufacturing an electrode according to a first variation. [Figure 5] 4 shows a flow chart of a method process for manufacturing an electrode according to a second variation. DETAILED DESCRIPTION OF THE INVENTION

[0057] 1 shows a first embodiment of an apparatus 2 provided and configured for producing an electrode 4. The apparatus comprises six rollers: a first roller 6, a second roller 8, a third roller 10, a fourth roller 12, a fifth roller 14 and a sixth roller. The rollers are arranged side by side, in other words, their axes of rotation A are parallel to one another and lie in a common plane. The respective directions of rotation of all rollers are indicated by arrows. The rollers 6 have the same diameter according to the embodiment shown here.

[0058] A first roller gap 18 is formed between the first roller 6 and the second roller 8. In other words, the first roller 6 and the second roller 8 are spaced apart from each other while forming the first roller gap 18. A conveying device 20, for example configured as a hopper, of the apparatus 20 is configured to convey a solvent-free, i.e., dry, dry film material between the first roller 6 and the second roller 8, i.e., to the first roller gap 18. The first roller 6 is positioned on the outside of the roller train; in other words, the first roller 6 forms the end of the first roller train. The first roller 6 and the second roller 8 are used to process the dry film material conveyed to the first roller gap 18 into a first dry film 22.

[0059] A second roller gap 24 is formed between the second roller 8 and the third roller 10. The second roller gap 24 has a gap width corresponding to a preset target thickness of the first dry film 22. Therefore, the second roller 8 and the third roller 10 are provided and configured to compress the first dry film 22. Therefore, the gap width of the second roller gap 24 is smaller than the gap width of the first roller gap 18.

[0060] A third roller gap 26 is formed between the third roller 10 and the fourth roller 12. A feeding device 28, shown here as a guide roller of the device 2, is configured to feed a substrate 30, in particular in the form of a film, into the third roller gap 26.

[0061] The fifth roller 14 is positioned on the outside of the roller train, i.e., the fifth roller 14 forms the second end of the roller train. A fourth roller gap 32 is formed between the fifth roller 14 and the sixth roller 16. A conveying device 20 configured as a hopper, as an example of an apparatus 22, is configured to convey the solvent-free, i.e., dry, dry film material between the fifth roller 14 and the sixth roller 8, i.e., to the fourth roller gap 32. The fifth roller 14 and the sixth roller 16 are used to process the dry film material conveyed to the fourth roller gap 32 into a second dry film 34.

[0062] A fifth roller gap 36 is formed between the sixth roller 6 and the fourth roller 12. The fifth roller gap 36 has a gap width corresponding to a preset target thickness of the second dry film 34. Accordingly, the fourth roller 12 and the sixth roller 16 are provided and configured to compress the second dry film 34. Therefore, the gap width of the fifth roller gap 36 is smaller than the gap width of the fourth roller gap 32.

[0063] The device 2 is configured so that the first dry film 22 formed in the first roller gap 18 is conveyed by the second roller 8 from the first roller gap 18 to the second roller gap 24. Furthermore, the device 2 is configured so that the first dry film 22 compressed in the second roller gap 24 is conveyed by the third roller 10 from the second roller gap 24 to the third roller gap 26.

[0064] For this reason, the peripheral speed of the second roller 8 is higher than the peripheral speed of the first roller 6, and in particular, the rotational speed (angular velocity) of the second roller 8 is higher than the rotational speed of the first roller 6. The peripheral speed of the third roller 10 is set to be higher than the peripheral speed of the second roller 8, and in particular, the rotational speed (angular velocity) of the third roller 10 is higher than the rotational speed of the second roller 8. Alternatively or additionally, the surface roughness of the second roller 8 is higher than the roughness of the first roller 6, and the surface roughness of the third roller 10 is higher than the roughness of the second roller 8. Furthermore or alternatively, the temperature of the second roller 8 is higher than the temperature of the first roller 6, and the temperature of the third roller 10 is higher than the temperature of the second roller 8.

[0065] Similarly, the apparatus 2 is configured so that the second dry film 34 formed in the fourth roller gap 32 is conveyed by the sixth roller 16 from the fourth roller gap 32 to the fifth roller gap 36. Furthermore, the apparatus 2 is configured so that the second dry film 34 compressed in the fifth roller gap 36 is conveyed by the fourth roller 12 from the fifth roller gap 36 to the third roller gap 26.

[0066] For this reason, the peripheral speed of the sixth roller 16 is higher than the peripheral speed of the fifth roller 14, and in particular, the rotational speed (angular velocity) of the sixth roller 16 is higher than the rotational speed of the fifth roller 14. The peripheral speed of the fourth roller 12 is set to be higher than the peripheral speed of the sixth roller 16, and in particular, the rotational speed (angular velocity) of the fourth roller 12 is higher than the rotational speed of the sixth roller 16. Alternatively or additionally, the surface roughness of the sixth roller 16 is higher than the roughness of the fifth roller 14, and the surface roughness of the fourth roller 12 is higher than the roughness of the sixth roller 16. Furthermore or alternatively, the temperature of the sixth roller 16 is higher than the temperature of the fifth roller 14, and the temperature of the fourth roller 12 is higher than the temperature of the sixth roller 16.

[0067] Preferably, the orbital speed of the first dry film 22 or the second dry film 34 matches the peripheral speed of the third roller 10 or the fourth roller 12 .

[0068] FIG. 2 shows a second embodiment of the apparatus 2. The configuration for the apparatus 2 of FIG. 1 is similar. Unlike the embodiment of FIG. 1, the diameters of the rollers 6-16 are not equal. That is, the diameters of the third roller 10 and the fourth roller 12 are the same but are larger than the diameters of the first roller 6, the second roller 8, the fifth roller 14, and the sixth roller 16. Due to the relatively large diameters of the third roller and the fourth roller, roll-bending of the rollers 10 and 12 when laminating the first dry film 22 and the second dry film 34 onto the substrate 30 is advantageously avoided, or at least the risk of roll-bending is reduced.

[0069] 3 shows a third embodiment of the apparatus 2. This apparatus 2 has a first roller 6, a second roller 8, a third roller 10, and a fourth roller 12 arranged in a first row. Here, the configuration for rollers 6 to 10 of the apparatus of the first embodiment is similar, but a third roller gap 26 is provided and configured to laminate only a first dry film 22 onto a substrate.

[0070] In summary, this device is provided and configured so that a first dry film 22 is formed in a first roller gap 18 by a first roller 6 and a second roller 8, the first dry film 22 formed in the first roller gap 18 is transported to a second roller gap 24 by a second roller 8, and is compressed by the second roller 8 and a third roller 10. Furthermore, the device 2 according to the third embodiment is provided and configured so that the compressed first dry film 22 is transported from the second roller gap 24 to a third roller gap 26 by a third roller 10, and the compressed first dry film 22 is laminated onto a substrate 30 in the third roller gap 26.

[0071] Furthermore, the apparatus 2 according to the third embodiment has a second row of rollers, which includes a fifth roller 14, a sixth roller 16, a seventh roller 38, and an eighth roller 40. In this case, the apparatus 2 is configured so that the second dry film 34 is formed in the fourth roller gap 32 by the fifth roller 14 and the sixth roller 16, the second dry film 34 formed in the fourth roller gap 32 is transported by the sixth roller 16 to the fifth roller gap 36 formed between the sixth roller 16 and the seventh roller 38, and is compressed in the fifth roller gap 36 by the sixth roller 16 and the seventh roller 38. Furthermore, the device 2 according to the third embodiment is configured and arranged so that the compressed second dry film 34 is transported by the seventh roller 38 from the fifth roller gap 36 to the sixth roller gap 42 formed by the seventh roller 38 and the eighth roller 40, and the compressed second dry film 34 in this sixth roller gap 42 is laminated onto the substrate 30 having the first dry film 22.

[0072] For this reason, in the case of the rollers 14 to 40 of the second roller train, the peripheral speed of the sixth roller 16 is set to be higher than the peripheral speed of the fifth roller 14, and in particular, the rotational speed (angular velocity) of the sixth roller 16 is higher than the rotational speed of the fifth roller 14. The peripheral speed of the seventh roller 38 is set to be higher than the peripheral speed of the sixth roller 16, and in particular, the rotational speed (angular velocity) of the seventh roller 38 is higher than the rotational speed of the sixth roller 16. Alternatively or additionally, the surface roughness of the sixth roller 16 is higher than the roughness of the fifth roller 14, and the surface roughness of the seventh roller 38 is higher than the roughness of the sixth roller 16. Furthermore or alternatively, the temperature of the sixth roller 16 is higher than the temperature of the fifth roller 14, and the temperature of the seventh roller 38 is higher than the temperature of the sixth roller 16.

[0073] Preferably, the orbital speed of the first dry film 22 matches the peripheral speed of the third roller 10 and / or the orbital speed of the second dry film 34 matches the peripheral speed of the seventh roller 38 .

[0074] 1-3, although not shown in detail, the line loads and / or gap widths of the first roller gap 18, the second roller gap 24, the third roller gap 26, and possibly the fourth roller gap 32, the fifth roller gap 36, and / or the sixth roller gap 42 can be set individually, i.e., independently of one another. Additionally or alternatively, the gap widths are or are adjusted at the first roller gap 18, the second roller gap 24, the fourth roller gap 32, and / or the fifth roller gap 36. Additionally or alternatively, the line load, i.e., the rolling force, is or is adjusted at the third roller gap 26 and / or the sixth roller gap 42.

[0075] A flow chart illustrating a method for manufacturing an electrode according to the first variant is shown in Figure 4. In particular, an apparatus 2 according to Figures 1 and / or 2 is used for this method.

[0076] In a first step Ia, the solvent-free dry film material is conveyed to a first roller gap 18, where it is converted into a first dry film 22. The solvent-free dry film material is then conveyed to a fourth roller gap 32, where it is converted into a second dry film 34.

[0077] In the second step IIa, the first dry film 22 is conveyed by the second roller 8 to the second roller gap 24 and compressed in the second roller gap 24, and the second dry film is conveyed by the sixth roller 16 to the fifth roller gap 36 and compressed in the fifth roller gap 36.

[0078] In a third step IIIa, the compressed first dry film 22 is roller-transported to a third roller gap 26 by a third roller 10. Furthermore, the compressed second dry film 34 is roller-transported to the third roller gap 26 by a fourth roller 12. The substrate 30 is transported to the third roller gap 26 so that the substrate 30 is disposed between the first dry film 22 and the second dry film 34. In the third roller gap 26, the first dry film 22 and the second dry film 34 are laminated on the substrate 30 while forming an electrode 4.

[0079] A flow chart illustrating a method for producing an electrode according to a second variant is shown in Figure 5. In particular, the device 2 according to Figure 3 is used for this method.

[0080] In a first step Ib, the solvent-free dry film material is conveyed to a first roller gap 18 where it is converted into a first dry film 22 .

[0081] In the second step IIb, the first dry film 22 is conveyed by the second roller 8 to the second roller gap 24, where it is compressed.

[0082] In a third step IIIb, the compressed first dry film 22 is conveyed by the third roller 10 to the third roller gap 26. Further, the substrate 30 is conveyed to the third roller gap 26, where the first dry film 22 is laminated onto the substrate 30. Thus, the electrode 4 is already formed with a dry film, here the first dry film 22, on only one side of the substrate 30 of the electrode 4. The following steps are performed so that the electrode 4 is manufactured with the substrate 30 having dry films on both sides.

[0083] In a fourth step IVb, the solvent-free dry film material is conveyed to a fourth roller gap 32 where it is converted into a second dry film 34 .

[0084] In the fifth step Vb, the second dry film is conveyed by the sixth roller 16 to the fifth roller gap , where it is compressed.

[0085] In a sixth step VIb, the compressed second dry film 34 is roller-transported by a seventh roller 38 to a sixth roller gap 42. Furthermore, the substrate 30 laminated with the first dry film 22 is roller-transported to the sixth roller gap 42 so that the substrate 30 is disposed between the first dry film 22 and the second dry film 34. In the sixth roller gap 42, the second dry film 34 is laminated onto the substrate 30 having the first dry film 22 during the formation of the electrodes 4.

[0086] The invention is not limited to the above-described embodiments. On the contrary, other variations of the invention can be derived from these embodiments within the scope of the claims without departing from the subject matter of the invention. In particular, all individual features related to these embodiments and / or described in the claims can also be combined with one another in other ways without departing from the subject matter of the invention. This application relates to the invention described in the claims, but may also include the following configurations as other aspects: 1. In particular, a method for manufacturing an electrode (4) having a film-like substrate (30) and a first dry film (22), comprising: - a solvent-free dry film material is conveyed, in particular transported, to a first roller gap (18) formed between a first roller (6) and a second roller (8) to form a first dry film (22); The first dry film (22) formed in the first roller gap (18) is conveyed to a second roller gap (24) formed between the second roller (8) and the third roller (10) and compressed in the second roller gap (24); -For lamination, the compressed first dry film (22) and the substrate (30) are conveyed to a third roller gap (26) formed between the third roller (10) and a fourth roller (12), and the first dry film (22) is conveyed to the third roller gap (26). 2. - a solvent-free dry film material is conveyed to a fourth roller gap (32) formed between the fifth roller (14) and the sixth roller (16) to form a second dry film (34); The second dry film (34) formed in the fourth roller gap (32) is conveyed to a fifth roller gap (36) formed between the sixth roller (16) and the seventh roller (38) and compressed in the fifth roller gap (36); The method according to claim 1, wherein the substrate (30) laminated with the compressed second dry film (34) and the first dry film (22) to be laminated together is transported to a sixth roller gap (42) formed between the seventh roller (10) and the eighth roller (40), and the second dry film (34) is transported to the sixth roller gap (42). 3. - a solvent-free dry film material is conveyed, in particular transported, to a fourth roller gap (32) formed between the fifth roller (14) and the sixth roller (16) to form a second dry film (34); The second dry film (34) formed in the fourth roller gap (32) is conveyed to a fifth roller gap (36) formed between the sixth roller (16) and the fourth roller (12) and compressed in the fifth roller gap (36); The method according to claim 1, wherein the compressed second dry film (34), the substrate (30) and the first dry film (22) are transported to the third roller gap (26) to be laminated together, and the second dry film (34) is transported by rollers to the third roller gap (26). 4. The first dry film (22) at the second roller gap (24) and / or the second dry film at the sixth roller gap (42) each have a viscosity of 1.0 g / cm 3 ~4g / cm 3 thickness, especially 1.4g / cm 3 ~3.7g / cm 3 4. The method according to any one of 1 to 3 above, wherein the image is compressed into a 5. 5. The method according to any one of 1 to 4 above, wherein the first dry film (22) is compressed in the second roller gap (24) and / or the second dry film is compressed in the sixth roller gap (42) to a thickness of 10 μm to 200 μm, particularly 40 μm to 120 μm. 6. the peripheral speed of the second roller (8) is greater than the peripheral speed of the first roller (6), and / or 6. The method according to any one of 1 to 5 above, wherein the peripheral speed of the third roller (10) is higher than the peripheral speed of the second roller (8). 7. The temperature of the second roller (8) is set higher than the temperature of the first roller (6), and / or 7. The method according to any one of 1 to 6 above, wherein the temperature of the third roller (10) is higher than the temperature of the second roller (8). 8. the surface of the second roller (8) has a roughness greater than that of the first roller (6), and / or 8. The method according to any one of 1 to 7 above, wherein the surface of the third roller (10) has a roughness greater than that of the surface of the second roller (8). 9. a first roller (6) and a second roller (8); a conveying device (20) for conveying the solvent-free dry film material into the first roller gap (18); - a third roller (10), - the fourth roller (12), a feeding device for feeding the substrate (30) into the third roller gap (26); and The first roller gap (18) is formed between the first roller (6) and the second roller (8), a second roller gap (24) for compressing the first dry film (22) formed in the first roller gap (18) is formed between the second roller (8) and the third roller (10); An apparatus (2) for manufacturing an electrode (4) having a substrate (30) and a first dry film (22) according to any one of the methods described in 1 to 8 above, wherein a third roller gap (26) is formed between the third roller (10) and the fourth roller (12). 10. the line load and / or gap width of the first roller gap (18), the second roller gap (24) and / or the third roller gap (26) are individually adjustable; and / or The device (2) described in claim 9, wherein the gap width is adjusted in the first roller gap (18) and / or the second roller gap (24), and / or the line load is adjusted in the third roller gap (26). [Explanation of symbols]

[0087] 2 equipment 4 electrodes 6. First Roller 8 Second Roller 10 Third Roller 12 Fourth Roller 14 5th Roller 16 6th Roller 18 First roller gap 20. Conveyor 22 First dry film 24 Second Roller Gap 26 Third roller gap 28 Feeding device 30 boards 32 4th roller gap 34 Second dry film 36 5th roller gap 38 7th Roller 40 8th Roller 42 6th roller gap A Roller (rotation) axis Ia. Manufacturing of the first dry film and the second dry film IIa Compression of the first and second dry films IIIa Lamination of the first dry film and the second dry film onto the substrate Ib. Manufacturing of the first dry film IIb Compression of the first dry film IIIb Lamination of the first dry film onto the substrate IVb. Second dry film production Vb Compression of the second dry film VIb Lamination of second dry film onto a substrate laminated with first dry film

Claims

1. A method for manufacturing an electrode (4) having a film-like substrate (30) and a first dry film (22), comprising: - a solvent-free dry film material is conveyed to a first roller gap (18) formed between a first roller (6) and a second roller (8) to form a first dry film (22); The first dry film (22) formed in the first roller gap (18) is conveyed to a second roller gap (24) formed between the second roller (8) and the third roller (10) and compressed in the second roller gap (24); - for lamination, the compressed first dry film (22) and the substrate (30) are conveyed to a third roller gap (26) formed between the third roller (10) and the fourth roller (12), and the first dry film (22) is conveyed by rollers to the third roller gap (26); the surface of said second roller (8) has a roughness greater than that of said first roller (6); and / or The method, wherein the surface of the third roller (10) has a greater roughness than the surface of the second roller (8).

2. - a solvent-free dry film material is conveyed to a fourth roller gap (32) formed between a fifth roller (14) and a sixth roller (16) to form a second dry film (34); The second dry film (34) formed in the fourth roller gap (32) is conveyed to a fifth roller gap (36) formed between the sixth roller (16) and the seventh roller (38) and compressed in the fifth roller gap (36); The method of claim 1, wherein the substrate (30) laminated with the compressed second dry film (34) and the first dry film (22) to be laminated together is transported to a sixth roller gap (42) formed between the seventh roller (38) and the eighth roller (40), and the second dry film (34) is roller-transported to the sixth roller gap (42).

3. - a solvent-free dry film material is conveyed to a fourth roller gap (32) formed between a fifth roller (14) and a sixth roller (16) to form a second dry film (34); The second dry film (34) formed in the fourth roller gap (32) is conveyed to a fifth roller gap (36) formed between the sixth roller (16) and the fourth roller (12) and compressed in the fifth roller gap (36); The method of claim 1, wherein the compressed second dry film (34), the substrate (30) and the first dry film (22) are conveyed to the third roller gap (26) to be laminated together, and the second dry film (34) is conveyed by rollers to the third roller gap (26).

4. The first dry film (22) has a coating density of 1.0 g / cm at the second roller gap (24). ３ ~4g / cm ３ 4. The method according to claim 1, wherein the mixture is compressed to a density of 0.1 to 0.

5.

5. 4. The method according to claim 1, wherein the first dry film (22) is compressed in the second roller gap (24) to a thickness of between 10 μm and 200 μm.

6. The second dry film has a coating density of 1.0 g / cm at the sixth roller gap (42). ３ ~4g / cm ３ 3. The method of claim 2, wherein the material is compressed to a density of 0.1 to 0.

25.

7. 3. The method of claim 2, wherein the second dry film is compressed to a thickness of 10 μm to 200 μm in the sixth roller gap (42).

8. the peripheral speed of the second roller (8) is greater than the peripheral speed of the first roller (6), and / or 4. A method according to any one of claims 1 to 3, characterized in that the peripheral speed of the third roller (10) is greater than the peripheral speed of the second roller (8).

9. The temperature of the second roller (8) is set higher than the temperature of the first roller (6), and / or Method according to any one of claims 1 to 3, characterized in that the temperature of the third roller (10) is higher than the temperature of the second roller (8).

10. a first roller (6) and a second roller (8), a conveying device (20) for conveying the solvent-free dry film material into the first roller gap (18); - a third roller (10), a fourth roller (12), a feeding device for feeding the substrate (30) into the third roller gap (26); and The first roller gap (18) is formed between the first roller (6) and the second roller (8), a second roller gap (24) for compressing the first dry film (22) formed in the first roller gap (18) is formed between the second roller (8) and the third roller (10); A third roller gap (26) is formed between the third roller (10) and the fourth roller (12). the surface of said second roller (8) has a roughness greater than that of said first roller (6); and / or 4. An apparatus (2) for manufacturing an electrode (4) having a substrate (30) and a first dry film (22) according to the method of any one of claims 1 to 3, wherein the surface of the third roller (10) has a roughness greater than the surface of the second roller (8).

11. the gap widths of the first roller gap (18), the second roller gap (24) and / or the third roller gap (26) are individually adjustable; and / or 11. The device (2) according to claim 10, characterized in that the gap width is adjusted in the first roller gap (18) and / or the second roller gap (24), and / or the line load is adjusted in the third roller gap (26).

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