Coating apparatus, method, and electrode

Abstract

To provide a coating device capable of manufacturing a dry electrode so that electrical conductivity or energy density of the electrode is increased.SOLUTION: A first aspect of the present invention assumes a coating device for manufacturing an electrode with at least one two-layer structured powder layer, in particular a two-layer structured cathode layer and / or two-layer structured anode layer, on a substrate, in particular, a current collector. The coating device is based on a roller-supported coating, in which a first powder is first applied as a first layer to a roller of a first pressure roller unit in order to then be transferred or pressed onto the substrate by this roller or another roller. A further roller-supported coating then takes place, in which a second powder is applied as a second layer to a roller of a third pressure roller unit in order to be then transferred to the first layer by this roller or another roller.SELECTED DRAWING: Figure 1

Description

Technical Field

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[0001] The present invention relates to a coating device for manufacturing an electrode having at least one powder layer of a two-layer structure on a substrate, the powder layer having the features described in independent claim 6, particularly a method for manufacturing an electrode having a cathode layer and / or an anode layer of a two-layer structure on a substrate, and an electrode having the features described in independent claim 13.

[0002] In attempts for solvent-free or dry-type electrode manufacturing, electrodes having a single-layer coating have conventionally been produced. In order to improve the performance of battery cells, an approach has been pursued in conventional electrode manufacturing to produce electrodes having a multi-layer coating (various different compositions of individual layers). This is because such electrodes have an increased energy density and conductivity.

[0003] Currently, electrodes having a multi-layer coating produced without using a solvent are often produced as self-supporting films. In this case, two powders are pressed against a current collector within a calender gap.

[0004] However, still, it is standard for electrodes to be wet-processed and thus contain a solvent.

[0005] Another mode is the sequential deposition of individual layers as self-supporting films on the side of the substrate provided therefor. For this purpose, for example, in two sequentially arranged calender gaps, the deposition and pressing of each individual layer can be performed.

[0006] However, in this case, often an adhesion promoter or a certain amount of moisture in the powder is required. This is because otherwise, the adhesion of each layer cannot be guaranteed. This may result in a substrate or current collector with an incomplete coating. Similarly, this may lead to an increase in defective products or a decrease in power of the electrodes thus manufactured.

[0007] Therefore, an object of the present invention is to overcome at least one of the aforementioned drawbacks, at least partially. In particular, an object of the present invention is to provide a coating apparatus that enables dry-type electrode manufacturing, thereby increasing the conductivity or energy density of the electrode. Furthermore, an object of the present invention is to provide a method for dry-type electrode manufacturing and an electrode manufactured in this manner.

[0008] The above-mentioned problems are solved by a coating apparatus having the features described in independent claim 1, a method having the features described in independent claim 6, and an electrode having the features described in independent claim 13. Further features and details of the present invention will become apparent from the dependent claims, specification and drawings. In this specification, the features and details described in relation to the coating apparatus according to the present invention are, of course, also valid in relation to the method according to the present invention and / or in relation to the electrode according to the present invention, and vice versa, so that the disclosures for individual embodiments of the present invention are always, or may be, related to one another.

[0009] According to the present invention, in a first aspect of the present invention, a coating apparatus is envisioned for manufacturing an electrode having at least one two-layer powder layer, in particular a two-layer cathode layer and / or a two-layer anode layer, on a substrate, in particular a current collector, the coating apparatus comprising a supply unit for supplying the substrate to a first crimping gap, a first roll apparatus for delivering the first powder as a first layer to the first side of the substrate, and a second roll apparatus for delivering the second powder as a second layer to the first layer on the first side of the substrate.

[0010] Here, the first roll equipment has a first metering unit that contains the first powder and fills the first metering gap with the first powder. Additionally, the first roll equipment has a first adherend roll, a first crimping roll unit, and a second crimping roll unit, where the first metering gap is provided between the first adherend roll and the first crimping roll unit, and the first crimping gap is provided between the first crimping roll unit and the second crimping roll unit. The first metering gap is provided to adhere the first powder as a first layer to the first crimping roll unit by a first adhesion force, and the first crimping gap is provided to transfer the first layer from the first crimping roll unit to the first side of the substrate by a first crimping force.

[0011] The second roll equipment is positioned after the first roll equipment, and the first roll equipment is configured to supply the substrate coated on the first side to the second crimping gap of the second roll equipment.

[0012] Here, the second roll equipment has a second metering unit that contains the second powder and fills the second metering gap with the second powder. Here, the second roll equipment has a second adherend roll, a third crimping roll unit and a fourth crimping roll unit, the second metering gap is provided between the second adherend roll and the third crimping roll unit, and the second crimping gap is provided between the third crimping roll unit and the fourth crimping roll unit. Here, the second metering gap is provided to adhere the second powder as a second layer to the third crimping roll unit by a second adherent force, and the second crimping gap is provided to transfer the second layer from the third crimping roll unit to the first layer on the first side of the supplied substrate by a second crimping force.

[0013] The coating apparatus is based on roll-carried coating, where first, a first powder is applied as a first layer to the rolls of a first crimping roll unit, and then transferred or crimped onto the substrate from or from one roll. Subsequently, further roll-carried coating is performed, where a second powder is applied as a second layer to the rolls of a third crimping roll unit, and then transferred onto the first layer from or from another roll. This is particularly advantageous for coating substrates with dry powder materials that do not contain solvents, and therefore the coating apparatus is extremely suitable for dry-type electrode manufacturing.

[0014] Furthermore, the first adherend roll of the first roll equipment and the second adherend roll of the second roll equipment can have a lower rotational speed than the crimping rolls of the first crimping roll unit or the third crimping roll unit, which together form the metering gap. This ensures that the first powder continues to adhere to the first crimping roll unit as the first layer, and the second powder continues to adhere to the third crimping roll unit as the second layer. In this case, when the powder is applied to each adherend roll, each powder is sheared in the metering gap. Therefore, the adhesion force may be a shearing force, and the adherend rolls can also be called shearing rolls.

[0015] The first and second crimping roll units may each have one crimping roll. The crimping rolls of the first and second crimping roll units rotate facing each other at the same rotational speed to form a crimping gap in order to apply a crimping force for transferring the first layer, thereby providing an optimal coating result. The first workpiece roll may have a lower rotational speed than the crimping roll of the first crimping roll unit, which together forms a metering gap with the first workpiece roll, thereby ensuring that the first and second powders remain attached to the first crimping unit as the first layer and are carried by the first crimping unit. The same applies to the third and fourth crimping roll units of the second roll equipment. These may each have one crimping roll, and these crimping rolls rotate facing each other at the same rotational speed to apply a pressing force for transferring the second layer to the first layer.

[0016] In this process, the rotational speeds of the first and second crimping roll units are matched to the rotational speeds of the third and fourth crimping roll units, so that the shear force on the first layer already applied in the second crimping gap is minimized so as not to damage the coating.

[0017] By sequentially applying each layer of the two-layer powder structure, the boundary layer between the first powder and the second powder, i.e., between the first and second layers, of the first two-layer powder structure is reduced. This is because mixing of the first and second powders does not occur.

[0018] Within the framework of the present invention, it may be advantageous that the first roll equipment has a third metering unit that contains a third powder and fills a third metering gap with the third powder, the first roll equipment has a third adherend roll, the third metering gap is provided between the third adherend roll and the second crimping roll unit, and the third metering gap is provided to adhere the third powder as a third layer to the third crimping roll unit by a third adhesive force. The first crimping gap is provided to transfer the third layer from the second crimping roll unit to the second side of the substrate by a first crimping force.

[0019] This makes it possible to adhere the first layer to the first side of the substrate and, in parallel, the third layer to the second side of the substrate by a first pressing force in the first pressing gap.

[0020] Within the framework of the present invention, it is conceivable that the second roll equipment has a fourth metering unit that contains the fourth powder and fills the fourth metering gap with the fourth powder, the second roll equipment has a fourth adherend roll, the fourth metering gap is provided between the fourth adherend roll and the fourth crimping roll unit, the fourth metering gap is provided to adhere the fourth powder as a fourth layer to the fourth crimping roll unit by a fourth adhesive force, and the second crimping gap is provided to transfer the fourth layer from the fourth crimping roll unit to the third layer on the second side of the substrate by a second crimping force.

[0021] This makes it possible to adhere the second layer to the first layer of the substrate, and simultaneously adhere the fourth layer to the third layer of the substrate, using a second pressing force in the second pressing gap.

[0022] In this case, the characteristics and features of the coating apparatus mentioned in relation to the first and second adherend rolls also apply to the characteristics and features related to the third and fourth adherend rolls.

[0023] Furthermore, the third adherend roll of the first roll equipment and the fourth adherend roll of the second roll equipment can have a lower rotational speed than the crimping rolls of the second crimping roll unit or the fourth crimping roll unit, respectively, which together form the metering gap. This ensures that the third powder continues to adhere to the second crimping roll unit as a third layer, and the fourth powder continues to adhere to the fourth crimping roll unit as a fourth layer.

[0024] Within the framework of the present invention, it may be assumed that the first crimping roll unit of the first roll equipment has at least one first crimping roll and at least one second crimping roll, and that at least one first press gap is provided between the at least one first crimping roll and at least one second crimping roll. Additionally or alternatively, the second crimping roll unit of the first roll equipment has at least one third crimping roll and at least one fourth crimping roll, and that at least one second press gap is provided between the at least one third crimping roll and at least one fourth crimping roll. Additionally or alternatively, the third crimping roll unit of the second roll equipment has at least one fifth crimping roll and at least one sixth crimping roll, and that at least one third press gap is provided between the at least one fifth crimping roll and at least one sixth crimping roll. Additionally or alternatively, the fourth crimping roll unit of the second roll equipment has at least one seventh crimping roll and at least one eighth crimping roll, with at least one fourth press gap between the at least one seventh crimping roll and the at least one eighth crimping roll.

[0025] The first press gap and / or the second press gap and / or the third press gap and / or the fourth press gap press the first, second, third, or fourth layer, after which these layers are delivered to the substrate. This allows for denser packing of the first two-layer powder structure, which has a first layer and a second layer. Simultaneously, denser packing of the second two-layer powder structure can also be produced, which has a third layer and a fourth layer. This also further improves conductivity. Furthermore, the press gaps have the additional effect of reducing the shear force acting in both the metering gap and the crimping gap, as less force is required for adhesion or delivery. This results in uniform adhesion and delivery, and reduces defects during adhesion or delivery.

[0026] It is further conceivable that in the region of the first metering gap, a first shielding plate is provided in the region of the first adherend roll and / or a second shielding plate is provided in the region of the first crimping roll unit. Additionally or alternatively, it is conceivable that in the region of the second metering gap, a third shielding plate is provided in the region of the second adherend roll and / or a fourth shielding plate is provided in the region of the third crimping roll unit. Additionally or alternatively, it is conceivable that in the region of the third metering gap, a fifth shielding plate is provided in the region of the third adherend roll and / or a sixth shielding plate is provided in the region of the second crimping roll unit. Additionally or alternatively, in the region of the fourth metering gap, a seventh shielding plate may be provided in the region of the fourth adherend roll, and / or an eighth shielding plate may be provided in the region of the fourth crimping roll unit.

[0027] The masking sheet is used to prevent the powder from already contacting each crimping roll unit before the metering gap, or from adhering to the receiving roll assigned to each crimping roll unit. At the same time, such a masking sheet can easily control the drawing of powder into the first metering gap and / or the second metering gap. At the same time, it is conceivable that the masking sheet has a structure for cleaning each receiving roll and / or each crimping roll unit, or for removing the adhering material. This enables the deposition of the new first layer and / or second layer and / or third layer and / or fourth layer to be as clean as possible, or the clean transfer of the first layer and / or second layer to the substrate, or the clean transfer of the third layer to the first layer and / or the clean transfer of the fourth layer to the second layer.

[0028] Furthermore, in the case of the coating device, it is conceivable that the first receiving roll and / or the second receiving roll and / or the third receiving roll and / or the fourth receiving roll and / or the first crimping roll unit and / or the second crimping roll unit and / or the third crimping roll unit and / or the fourth crimping roll unit are temperature adjustable.

[0029] This can significantly simplify the deposition and transfer of various powders or layers to the roll or substrate. This is because the adhesion on the surface can be adjusted according to the material to be deposited.

[0030] In the second aspect of the present invention, the above-mentioned problem is further solved by a method according to the present invention for manufacturing an electrode having at least one two-layer powder layer, particularly a two-layer cathode layer and / or a two-layer anode layer, on a substrate, particularly a current collector, in a coating device according to any of the preceding claims. This method comprises: · Supplying the substrate into the first crimping gap of the first roll equipment by a supply unit; · A step of filling a first metering gap with a first powder by a first metering unit, · A step of adhering the first powder as a first layer to a first crimping roll unit in the first metering gap with a first adhesive force, · A step of delivering the first layer to the first side of a base material in a first crimping gap with a crimping force, · A step of supplying the base material with the delivered first layer to a second crimping gap of a second roll facility, · A step of filling a second metering gap with a second powder by a second metering unit, · A step of adhering the second powder as a second layer to a third crimping roll unit in the second metering gap with a second adhesive force, · A step of delivering the second layer to the first layer on the first side of the base material in the second crimping gap with a second crimping force, It has.

[0031] By sequentially adhering the first layer and the second layer, the first layer is additionally compressed, which advantageously affects the conductivity and energy density of the electrode that can be manufactured using this first layer.

[0032] It is also conceivable in this method that a third metering unit fills a third metering gap with a third powder, and the third powder is adhered as a third layer to a second crimping roll unit with a third adhesive force in the third metering gap, and the third layer is delivered to the second side of the base material with a first crimping force in the first crimping gap.

[0033] By the third metering unit and the third adhering roll, it becomes possible to deliver the first layer to the first side of the base material and at the same time deliver the third layer to the second side of the base material. This saves time and is efficient.

[0034] Within the scope of the present invention, optionally, the fourth metering unit can be filled with a fourth metering gap with a fourth powder, the fourth powder being adhered to the fourth crimping roll unit as a fourth layer by a fourth adhesion force in the fourth metering gap, and the fourth layer being transferred to the third layer on the second side of the substrate by a second crimping force in the second crimping gap.

[0035] The fourth metering unit and the fourth adherend roll enable the transfer of the second layer to the first layer on the first side of the substrate, while simultaneously transferring the fourth layer to the third layer on the second side of the substrate. This saves time and is efficient.

[0036] Furthermore, within the framework of the present invention, it may be assumed that the first metering unit continuously fills the first metering gap, and / or the second metering unit continuously fills the second metering gap, and / or the third metering unit continuously fills the third metering gap, and / or the fourth metering unit continuously fills the fourth metering gap.

[0037] This ensures particularly uniform results when generating each layer on the crimping roll unit, and the crimping roll unit is then delivered to the substrate or a layer already applied to the substrate.

[0038] With respect to the present invention, it is conceivable that the first layer be pressed in at least one first press gap of the first crimping roll unit of the first roll equipment. Additionally or alternatively, it is conceivable that the third layer be pressed in at least one second press gap of the second crimping roll unit of the first roll equipment. Additionally or alternatively, it is conceivable that the second layer be pressed in at least one third press gap of the third crimping roll unit of the second roll equipment. Additionally or alternatively, it is conceivable that the fourth layer be pressed in at least one fourth press gap of the fourth crimping roll unit of the second roll equipment.

[0039] Pressing within each press gap causes compression of the first layer and / or the second layer and / or the third layer and / or the fourth layer, thereby creating a denser packing of the at least two-layer powder layers on the first and / or second sides of the substrate. This allows for a reduction in the first and / or second and / or third and / or fourth and / or first and / or second pressing forces.

[0040] Furthermore, it is conceivable to adjust the temperature of the first adherend roll and / or the second adherend roll and / or the third adherend roll and / or the fourth adherend roll and / or the first crimping roll unit and / or the second crimping roll unit and / or the third crimping roll unit and / or the fourth crimping roll unit to 80°C to 150°C, particularly 100°C to 120°C.

[0041] This allows for improved adhesion of the first and second powders as the first layer to the first crimping roll unit, and / or improved adhesion of the third and fourth powders as the second layer to the second crimping roll unit. Furthermore, temperature control of the individual rolls can improve the transfer of the first layer to the first side of the substrate and / or the transfer of the third layer to the second side of the substrate and / or the transfer of the second layer to the first layer on the first side of the substrate and / or the transfer of the fourth layer to the third layer on the second side of the substrate. This is because the individual bonding of the individual powders in each layer is enhanced by heat.

[0042] In this case, it is also conceivable to adjust the temperature of the supply unit in order to preheat the substrate for delivery, that is, for pressing the first layer onto the first side of the substrate and / or pressing the third layer onto the second side of the substrate.

[0043] Within the framework of the present invention, it may be advantageous for the first crimping roll unit and the second crimping roll unit of the first roll equipment to face each other and rotate at the same first rotational speed, where the ratio of the first rotational speed of the first crimping roll unit to the second rotational speed of the first roll to be applied is 10:1 to 10:4, preferably 10:1.5 to 10:3, and more preferably 10:2 to 10:3, and / or the ratio of the first rotational speed of the second crimping roll unit to the fifth rotational speed of the third roll to be applied is 10:1 to 10:4, preferably 10:1.5 to 10:3, and more preferably 10:2 to 10:3. Additionally or alternatively, the third crimping roll unit and the fourth crimping roll unit of the second roll equipment rotate facing each other at the same third rotational speed, and the ratio of the third rotational speed of the third crimping roll unit to the fourth rotational speed of the second roll to be attached is 10:1 to 10:4, preferably 10:1.5 to 10:3, and more preferably 10:2 to 10:3, and / or the ratio of the third rotational speed of the fourth crimping roll unit to the sixth rotational speed of the fourth roll to be attached is 10:1 to 10:4, preferably 10:1.5 to 10:3, and more preferably 10:2 to 10:3.

[0044] If the first crimping roll unit of the first roll equipment has a first crimping roll and a second crimping roll, and / or the second crimping roll unit of the first roll equipment has a third crimping roll and a fourth crimping roll, then the first rotational speed is effective as the rotational speed of the first crimping roll of the first crimping roll unit and the third crimping roll of the second crimping roll unit, because they form the first crimping gap. In this case, the second crimping roll and the fourth crimping roll may each have a rotational speed different from the first rotational speed. For example, the ratio of the first rotational speed of the first crimping roll and the third crimping roll to the rotational speed of the second crimping roll and / or the fourth crimping roll may be 10:5 to 10:8, preferably 10:6 to 10:8, and even more preferably 10:7 to 10:8.

[0045] If the third crimping roll unit of the second roll equipment has a fifth crimping roll and a sixth crimping roll, and / or the fourth crimping roll unit of the second roll equipment has a seventh crimping roll unit and an eighth crimping roll unit, then the third rotational speed is effective as the rotational speed of the fifth crimping roll and the seventh crimping roll, because they form the second crimping gap. Here again, the sixth crimping roll and the eighth crimping roll may each have a rotational speed different from the third rotational speed. For example, the ratio of the third rotational speed of the fifth and seventh crimping rolls to the rotational speed of the sixth crimping roll and / or the eighth crimping roll may be 10:5 to 10:8, preferably 10:6 to 10:8, and even more preferably 10:7 to 10:8.

[0046] Here, it has been found that the ratio of rotational speeds is advantageous in that it leads to improved stability of the first layer or first at least two-layer powder layer on the electrode current collector, and / or the second layer or second at least two-layer powder layer on the electrode current collector.

[0047] The above-mentioned problems are further solved in a third aspect of the present invention by an electrode according to the present invention having a two-layer powder layer, manufactured by the above-described coating apparatus and / or method, wherein the substrate is a current collector having a first side and a second side, the first layer of the two-layer powder layer consisting of a first powder, and the second layer of the two-layer powder layer consisting of a second powder.

[0048] Within the framework of the present invention, it is conceivable that the third layer of the two-layer powder structure consists of a third powder, and the fourth layer of the two-layer powder structure consists of a fourth powder.

[0049] Here, the electrode can be used as both an anode and a cathode. In this case, it is possible that the two-layer powder structure of the cathode is different from that of the anode. It is also possible that the current collector of the anode and the current collector of the cathode are different.

[0050] Such electrodes have an optimally compressed two-layer powder structure, and the two-layer powder structure does not contain solvents. At the same time, electrodes manufactured in this manner have high conductivity and energy density.

[0051] A particularly good ratio of the use of the first, second, third, and fourth powders in a two-layer powder structure to the existing conductivity is obtained when the two-layer powder structure has a layer thickness of 40 to 150 μm, where the first powder in the first layer and the third powder in the third layer have layer thicknesses of 10 to 70 μm. This also improves the cost efficiency of material use.

[0052] The advantages described in detail with respect to the coating apparatus of the first aspect of the present invention also apply to the method of the second aspect of the present invention and the electrode of the third aspect of the present invention.

[0053] Further advantages, features, and details of the present invention will become apparent from the following description. The following description details several embodiments of the present invention with reference to the drawings. In this application, the features described in the claims and specification can form the essence of the present invention individually or in any combination. The present invention is illustrated in the following drawings. [Brief explanation of the drawing]

[0054] [Figure 1] This diagram schematically shows a coating apparatus for applying and transferring the first two-layer powder layer. [Figure 2] This diagram schematically shows a coating apparatus for applying and transferring the first two-layer powder layer and the second two-layer powder layer. [Figure 3] This figure shows a portion of the first metering gap in Figure 1. [Figure 4] This figure schematically illustrates the method using the coating device shown in Figure 1. [Figure 5] This figure schematically illustrates the method using the coating device shown in Figure 2. [Figure 6]This is a schematic diagram showing the electrodes.

[0055] Figures 1 and 2 show a coating apparatus 10 for manufacturing an electrode 11 having at least one bilayer powder layer 12, in particular a bilayer cathode layer 13 and / or a bilayer anode layer 14, on a substrate 15, in particular a current collector 16. Here, Figure 1 shows a coating apparatus 10 for coating one side of the substrate 15 by adhering 130 and delivering 140 of at least one first bilayer powder layer 12, i.e., a first layer 26 and a second layer 34, and at least one second bilayer powder layer 12, i.e., a third layer 41 and a fourth layer 47, by adhering 130, 180 and delivering 140, 190 of the substrate 15.

[0056] Both the coating apparatus 10 in Figure 1 and the coating apparatus 10 in Figure 2 include a supply unit 17 110 for supplying the substrate 15 into the first crimping gap 18, a first roll equipment 140 19 for delivering the first powder 21 as the first layer 26 to the first side 27 of the substrate 15, and a second roll equipment 140 28 for delivering the second powder 29 to the first layer 26 on the first side 27 of the substrate 15.

[0057] Here, the first roll equipment 19 has a first metering unit 20 that contains the first powder 21 and fills the first metering gap 22 with the first powder 21. Furthermore, the first roll equipment 19 includes a first adherend roll 23, a first crimping roll unit 24, and a second crimping roll unit 25. Here, the first metering gap 22 is provided between the first adherend roll 23 and the first crimping roll unit 24, and the first crimping gap 18 is provided between the first crimping roll unit 24 and the second crimping roll unit 25.

[0058] A first metering gap 22 is provided here for adhering the first powder 21 as a first layer 26 to the first crimping roll unit 24 by a first adhesion force FA1 130, and a first crimping gap 18 is provided for transferring the first layer 26 from the first crimping roll unit 24 to the first side 27 of the base material 15 by a first crimping force FP1 140.

[0059] The second roll equipment 28 is located after the first roll equipment 19. Here, the first roll equipment 19 is configured to supply the base material 15, which is covered on the first side 27, to the second crimping gap 30 of the second roll equipment 28.

[0060] The second roll equipment 28 has a second metering unit 31 that contains the second powder 29 and fills the second metering gap 32 with the second powder 29. Furthermore, the second roll equipment 28 has a second adherend roll 33, a third crimping roll unit 34, and a fourth crimping roll unit 35. Here, the second metering gap 32 is provided between the second adherend roll 33 and the third crimping roll unit 34. Similarly, the second crimping gap 30 is provided between the third crimping roll unit 34 and the fourth crimping roll unit 35. Here, a second metering gap 32 is provided for adhering the second powder 29 as a second layer 36 to the third crimping roll unit 34 by a second adhesion force FA2 130, and a second crimping gap 30 is provided for transferring the second layer 36 from the third crimping roll unit 34 to the first layer 26 on the first side 27 of the supplied substrate 15 by a second crimping force FP2 140.

[0061] In order to allow the two-layer powder layer 12 to be adhered to the substrate 15 on both sides, the first roll equipment 19 of the coating apparatus 10 in Figure 2 has a third metering unit 37 that contains a third powder 38 and fills a third metering gap 39 with the third powder 38. Furthermore, a third adherend roll 40 is provided, where the third metering gap 39 is provided between the third adherend roll 40 and the second crimping roll unit 25. Here, the third metering gap 39 is used to adhere the third powder 38 as a third layer 41 to the third crimping roll unit 34 by a third adherence force FA3 130. In this situation as well, the first crimping gap 18 is provided to transfer the third layer 41 from the second crimping roll unit 25 to the second side 42 of the substrate 15 by a first crimping force FP1 140.

[0062] Additionally, the second roll equipment 28 has a fourth metering unit 43 that contains the fourth powder 44 and fills the fourth metering gap 45 with the fourth powder 44. For this purpose, a fourth adherend roll 46 is provided, where the fourth metering gap 45 is provided between the fourth adherend roll 46 and the fourth crimping roll unit 35. The fourth metering gap 45 is provided for adhering the fourth powder 44 as a fourth layer 47 to the fourth crimping roll unit 35 by a fourth adherend force FA4 130. The second crimping gap 30 is provided for transferring the fourth layer 47 from the fourth crimping roll unit 35 to the third layer 41 on the second side 42 of the substrate 15 by a second crimping force FP2 140.

[0063] Furthermore, in the coating apparatus 10 shown in Figure 2, it is shown that the first crimping roll unit 24 of the first roll equipment 19 has at least one first crimping roll 48 and at least one second crimping roll 49, with at least one first press gap 50 provided between the at least one first crimping roll 48 and at least one second crimping roll 49, and the second crimping roll unit 25 of the first roll equipment 19 has at least one third crimping roll 51 and at least one fourth crimping roll 52, with at least one second press gap 53 provided between the at least one third crimping roll 51 and at least one fourth crimping roll 52. In addition, the third crimping roll unit 34 of the second roll equipment 28 has at least one fifth crimping roll 54 and at least one sixth crimping roll 55, with at least one third press gap 56 provided between the at least one fifth crimping roll 54 and the at least one sixth crimping roll 55. Furthermore, the fourth crimping roll unit 35 of the second roll equipment 28 has at least one seventh crimping roll 57 and at least one eighth crimping roll 58, with at least one fourth press gap 59 provided between the at least one seventh crimping roll 57 and the at least one eighth crimping roll 58.

[0064] Figure 3 shows an enlarged portion of the first metering gap 22 with a first metering unit 20, which can be designed in both the coating apparatus 10 of Figure 1 and the coating apparatus 10 of Figure 2. Here, in the region of the first metering gap 22, a first shielding sheet 60 is provided in the region of the first adherend roll 23 and / or a second shielding sheet 61 is provided in the region of the first crimping roll unit 24.

[0065] Here, it is conceivable that in the region of the second metering gap 32, the third shielding plate 62 is provided in the region of the second adherend roll 33 and / or the fourth shielding plate 63 is provided in the region of the third crimping roll unit 34, and / or in the region of the third metering gap 39, the fifth shielding plate 64 is provided in the region of the third adherend roll 40 and / or the sixth shielding plate 65 is provided in the region of the second crimping roll unit 25, and / or in the region of the fourth metering gap 45, the seventh shielding plate 66 is provided in the region of the fourth adherend roll 46 and / or the eighth shielding plate 67 is provided in the region of the fourth crimping roll unit 35.

[0066] Figures 4 and 5 show, respectively, one method 100 for manufacturing an electrode 11 having at least one bilayer powder layer 12, in particular a bilayer cathode layer 13 and / or a bilayer anode layer 14, on a substrate 15, in particular a current collector 16, in the coating apparatus 10 of Figure 1 or Figure 2. These methods are - A supply unit 17 supplies the base material 15 into the first crimping gap 18 of the first roll equipment 19 in 110 steps. - 120 steps of filling the first metering gap 22 with the first powder 21 using the first metering unit 20. In the first metering gap 22, the first powder 21 is applied to the first crimping roll unit 24 as the first layer 26 by the first adhesion force FA1 in 130 steps. 140 steps of transferring the first layer 26 to the first side 27 of the base material 15 by a first crimping force FP1 in the first crimping gap 18. - Step 160: The delivered base material 15 with the first layer 26 is supplied to the second crimping gap 30 of the second roll equipment 28. - 170 steps of filling the second metering gap 32 with the second powder 29 using the second metering unit 31. In the second metering gap 32, the second powder 29 is applied to the third crimping roll unit 34 as a second layer 36 by a second adhesion force FA2 in 180 steps. 190 steps of transferring the second layer 36 to the first layer 26 on the first side 27 of the base material 15 by the second crimping force FP2 in the second crimping gap 30. It has.

[0067] The coating apparatus 10 in Figure 2 has a third metering unit 37, and therefore in the method of Figure 5, the third metering unit 37 fills the third metering gap 39 with the third powder 38 120, the third powder 38 is adhered to the second crimping roll unit 25 as a third layer 41 by a third adhesion force FA3 in the third metering gap 39 130, and the third layer 41 is delivered to the second side 42 of the substrate 15 by a first crimping force FP1 in the first crimping gap 18 140.

[0068] Furthermore, the coating apparatus 10 in Figure 2 is also provided with a fourth metering unit 43, and therefore in the method of Figure 5, the fourth metering unit 43 fills the fourth metering gap 45 with the fourth powder 44 170, the fourth powder 44 is adhered to the fourth crimping roll unit 35 as the fourth layer 47 by the fourth adhesion force FA4 in the fourth metering gap 45 180, and the fourth layer 47 is transferred to the third layer 41 on the second side 42 of the base material 15 by the second crimping force FP2 in the second crimping gap 30 140.

[0069] To improve the results of layer adhesion to the substrate 15, the coating apparatus 10 and method 100 are configured such that a first metering unit 20 continuously fills a first metering gap 22 120, a second metering unit 31 continuously fills a second metering gap 32 170, a third metering unit 37 continuously fills a third metering gap 39 120, and a fourth metering unit 43 continuously fills a fourth metering gap 45 170.

[0070] In method 100 of Figure 5, the first layer 26 is pressed in at least one first press gap 50 of the first crimping roll unit 24 of the first roll equipment 19 150, and the third layer 41 is pressed in at least one second press gap 53 of the second crimping roll unit 25 of the first roll equipment 19 150. Additionally, the second layer 36 is pressed in at least one third press gap 56 of the third crimping roll unit 34 of the second roll equipment 28 200, and the fourth layer 47 is pressed in at least one fourth press gap 59 of the fourth crimping roll unit 35 of the second roll equipment 28 200.

[0071] For better adhesion 130 and transfer 140 of the layers, the first adhesion roll 23 and second adhesion roll 33 as shown in Figures 1 and 2, as well as the third adhesion roll 40 and fourth adhesion roll 46 as shown in Figure 2, and the first crimping roll unit 24 and second crimping roll unit 25 and third crimping roll unit 34 and fourth crimping roll unit 35 as shown in Figures 4 and 5, are temperature-controlled to a temperature of 80°C to 150°C 210.

[0072] When the coating device 10 shown in Figure 1 is used to implement the method 100 shown in Figure 4, or when the coating device 10 shown in Figure 2 is used to implement the method 100 shown in Figure 5, the first crimping roll unit 24 and the second crimping roll unit 25 of the first roll equipment 19 rotate facing each other at the same first rotational speed v1, and the ratio of the first rotational speed v1 of the first crimping roll unit 24 to the second rotational speed v2 of the first roll to be applied 23 is 10:1 to 10:4. At the same time, the third crimping roll unit 34 and the fourth crimping roll unit 35 of the second roll equipment 28 rotate facing each other at the same third rotational speed v3, and the ratio of the third rotational speed v3 of the third crimping roll unit 34 to the fourth rotational speed v4 of the second roll to be applied 33 is 10:1 to 10:4.

[0073] In method 100 shown in Figure 5, the ratio of the first rotational speed v1 of the second crimping roll unit 25 to the fifth rotational speed v5 of the third crimping roll 40 is 10:1 to 10:4, and the ratio of the third rotational speed v3 of the fourth crimping roll unit 35 to the sixth rotational speed v6 of the fourth roll to be applied 46 is 10:1 to 10:4.

[0074] Figure 6 shows an electrode 11 having a two-layer powder layer 12 manufactured by the coating apparatus 10 shown in Figure 1 or Figure 2 and / or by method 100 as shown in Figure 3 or Figure 4. Here, the base material 15 is a current collector 16 having a first side 27 and a second side 42, the first layer 26 of the two-layer powder layer 12 consists of a first powder 21, and the second layer 36 of the two-layer powder layer 12 consists of a second powder 29.

[0075] Additionally, the third layer 41 of the two-layer powder layer 12 consists of a third powder 38, and the fourth layer 47 of the two-layer powder layer 12 consists of a fourth powder 44.

[0076] Here, the two-layer powder layer 12 on the first side 27 of the substrate 15 has a first layer thickness SD1, and the two-layer powder layer 12 on the second side 42 of the substrate 15 has a second layer thickness SD2 of 40 to 150 μm, the first powder 21 of the first layer 26 has a first layer thickness SP1 of 10 to 70 μm, and the third powder 38 of the third layer 41 has a second layer thickness SP2 of 10 to 70 μm. This also improves the cost efficiency of material usage. [Explanation of symbols]

[0077] 10 Coating device 11 electrodes 12. Two-layer powder structure 13 Cathode Layer 14 Anode Layer 15 Base material 16 Current collector 17 Supply Units 18. First crimping gap 19. First Roll Equipment 20 First metering unit 21 First Powder 22 First metering gap 23. First attachment roll 24 First crimping roll unit 25. Second crimping roll unit 26. The first layer 27 First side 28. Second Roll Equipment 29. Second powder 30 Second crimping gap 31. Second metering unit 32. Second metering gap 33. Second attachment roll 34 Third crimping roll unit 35. Fourth crimping roll unit 36. The second layer 37. Third metering unit 38. The third powder 39. The third metering gap 40 Third attachment roll 41. The third layer 42 Second side 43. Fourth metering unit 44. The fourth powder 45. The fourth metering gap 46. ​​The fourth attachment roll 47. The fourth layer 48 First crimping roll 49. Second crimping roll 50 First press gap 51 Third crimping roll 52. Fourth crimping roll 53 Second press gap 54. Fifth crimping roll 55. The sixth crimping roll 56 Third press gap 57. The 7th crimping roll 58. The 8th crimping roll 59. Fourth press gap 60 First shielding plate 61 Second shielding plate 62 Third shielding plate 63. Fourth shielding plate 64. Fifth shielding plate 65. Sixth shielding plate 66. The seventh shielding plate 67. The eighth shielding plate 100 ways Generation of the first and third layers 110 Supply 120 Parallel filling 130 Adherence 140 Handover 150 Press Generation of the second and fourth layers 160 supply 170 Parallel filling 180 Adhesion 190 Handover 200 press 210 Temperature adjustment FA1 First point of contact FA2 Second point of contact FA3 Third point of contact FA4 The fourth point of contact FP1 First crimping force FP2 Second crimping force SD1 First layer thickness of the powder layer of the first two-layer structure SD1 Second layer thickness of the powder layer in the second double-layer structure SP1 First layer thickness of the first powder in the first two-layer structure SP2 Second double-layer structure powder layer, second layer thickness of the third powder v1 First rotation speed v2 Second rotation speed v3 Third rotation speed v4 Fourth rotation speed v5 Fifth rotation speed v6 6th rotation speed

Claims

1. A coating apparatus (10) for manufacturing an electrode (11) having at least one two-layer powder layer (12) on a substrate (15), The coating device (10) is A supply unit (17) that supplies (110) a base material (15) into the first crimping gap (18), The system includes a first roll equipment (19) that delivers (140) a first powder (21) as a first layer (26) to the first side (27) of the substrate (15), The first roll equipment (19) has a first metering unit (20) that contains the first powder (21) and fills the first metering gap (22) with the first powder (21), and The first roll equipment (19) comprises a first workpiece roll (23), a first crimping roll unit (24), and a second crimping roll unit (25). The first metering gap (22) is provided between the first adherend roll (23) and the first crimping roll unit (24), and the first crimping gap (18) is provided between the first crimping roll unit (24) and the second crimping roll unit (25). The first metering gap (22) is provided for adhering the first powder (21) as a first layer (26) to the first crimping roll unit (24) by a first adhesion force (FA1) (130), and The first crimping gap (18) is provided to transfer (140) the first layer (26) from the first crimping roll unit (24) to the first side (27) of the substrate (15) by a first crimping force (FP1). The coating device (10) is The system includes a second roll equipment (28) that delivers (140) the second powder (29) to the first layer (26) on the first side (27) of the substrate (15), The second roll equipment (28) is positioned behind the first roll equipment (19), and the first roll equipment (19) is configured to supply the substrate (15) covered on the first side (27) to the second crimping gap (30) of the second roll equipment (28). The second roll equipment (28) has a second metering unit (31) that contains the second powder (29) and fills the second metering gap (32) with the second powder (29), The second roll equipment (28) comprises a second adherend roll (33), a third crimping roll unit (34), and a fourth crimping roll unit (35). The second metering gap (32) is provided between the second adherend roll (33) and the third crimping roll unit (34), and The second crimping gap (30) is provided between the third crimping roll unit (34) and the fourth crimping roll unit (35). The second metering gap (32) is provided for adhering the second powder (29) as a second layer (36) to the third crimping roll unit (34) by a second adhesion force (FA2) (130), and The second crimping gap (30) is provided to transfer (140) the second layer (36) from the third crimping roll unit (34) to the first layer (26) on the first side (27) of the supplied substrate (15) by a second crimping force (FP2), In the region of the first metering gap (22), the first shielding plate (60) is provided in the region of the first adherend roll (23), and / or the second shielding plate (61) is provided in the region of the first crimping roll unit (24), and / or In the region of the second metering gap (32), the third shielding plate (62) is provided in the region of the second adherend roll (33), and / or the fourth shielding plate (63) is provided in the region of the third crimping roll unit (34). Coating device (10).

2. The first roll equipment (19) has a third metering unit (37) that contains the third powder (38) and fills the third metering gap (39) with the third powder (38), and the first roll equipment (19) has a third adherend roll (40), and the third metering gap (39) is provided between the third adherend roll (40) and the second crimping roll unit (25), and the third metering gap (39) The first crimping gap (18) is provided for applying the third powder (38) as a third layer (41) to the third crimping roll unit (34) by a third adhesive force (FA3) (130), and the first crimping gap (18) is provided for transferring the third layer (41) from the second crimping roll unit (25) to the second side (42) of the substrate (15) by a first crimping force (FP1) (140). The coating apparatus (10) according to claim 1.

3. The second roll equipment (28) has a fourth metering unit (43) that contains the fourth powder (44) and fills the fourth metering gap (45) with the fourth powder (44), and the second roll equipment (28) has a fourth adherend roll (46), the fourth metering gap (45) is provided between the fourth adherend roll (46) and the fourth crimping roll unit (35), and the fourth metering gap (45) contains the fourth powder (44) A fourth layer (47) is provided to be attached to the fourth crimping roll unit (35) by a fourth adhesive force (FA4) (130), and the second crimping gap (30) is provided to transfer the fourth layer (47) from the fourth crimping roll unit (35) to the third layer (41) on the second side (42) of the substrate (15) by a second adhesive force (FP2) (140), the coating apparatus (10) according to claim 2.

4. The first crimping roll unit (24) of the first roll equipment (19) has at least one first crimping roll (48) and at least one second crimping roll (49), and there is at least one first press gap (50) between the at least one first crimping roll (48) and the at least one second crimping roll (49), and / or The second crimping roll unit (25) of the first roll equipment (19) has at least one third crimping roll (51) and at least one fourth crimping roll (52), and there is at least one second press gap (53) between the at least one third crimping roll (51) and the at least one fourth crimping roll (52), and / or The third crimping roll unit (34) of the second roll equipment (28) has at least one fifth crimping roll (54) and at least one sixth crimping roll (55), and at least one third press gap (56) is provided between the at least one fifth crimping roll (54) and the at least one sixth crimping roll (55), and / or the fourth crimping roll unit (35) of the second roll equipment (28) has at least one seventh crimping roll (57) and at least one eighth crimping roll (58), and at least one fourth press gap (59) is provided between the at least one seventh crimping roll (57) and the at least one eighth crimping roll (58), The coating apparatus (10) according to claim 1.

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