Coating device and production system

Abstract

The present application discloses a coating device (20) and a production system (90). The coating device (20) is used for preparing a coated product (101). The coated product (101) comprises a substrate (1011) and a metal film (1012). The coating device (20) comprises: a cooling assembly (201) comprising at least one magnetic field generating component for providing a magnetic field, and a current generating assembly (202) used for enabling a current to pass through the coated product (101), so that the direction of an ampere force applied to the coated product (101) in the magnetic field points to the cooling assembly (201). After being electrified, the metal film (1012) of the coated product (101) can be approximately regarded as an electrified conductor, and the electrified conductor experiences the ampere force in the magnetic field. Compared with methods of attaching cooling assemblies by means of electrostatic adsorption forces, the present application exhibits a relatively large ampere force, such that the coated product can be more tightly attached to the cooling assembly. The coated product prepared has a smoother surface and is more uniformly cooled by the cooling assembly, and the film surface is not prone to damage, so that the probability of deformation of the film surface can be reduced, thereby improving the yield of the coated product.

Description

A coating device and production system

[0001] The present application claims priority to the Chinese patent application No. 2024104486756, filed on April 15, 2024, and entitled "A coating device and production system", the whole content of which is incorporated herein by reference. TECHNICAL FIELD

[0002] The present application relates to the technical field of evaporation coating, in particular to a coating device and production system. BACKGROUND

[0003] Currently, the evaporation process is widely used in the field of lithium batteries. For example, the evaporation process is often used to prepare a composite current collector with a "metal-substrate-metal" three-layer composite structure.

[0004] The evaporation process of the coated product such as the composite current collector is as follows: the coated product is attached to the surface of a cooling drum, and the cooling drum cools the coated product. The high-temperature metal vapor generated by the electron gun irradiating the target material forms a few nanometer thin film on the surface of the coated product when it is cooled. After repeated evaporation, a coated product with a metal film thickness of several microns is finally prepared.

[0005] However, in the actual evaporation process, the film surface of the coated product is prone to deformation such as film surface damage or wrinkling, resulting in a low yield of the coated product.

[0006] Therefore, how to improve the yield of the coated product is a technical problem to be solved at present.

[0007] SUMMARY

[0008] The purpose of the embodiments of the present application is to provide a coating device and production system, which includes but is not limited to solving the problem of how to improve the yield of the coated product.

[0009] The technical solution adopted by the embodiments of the present application is:

[0010] According to a first aspect of the present application, a coating device is provided for preparing a coated product, the coated product comprising a substrate and a metal film, the coating device comprising:

[0011] a cooling assembly for cooling the coated product, wherein the cooling assembly comprises at least one magnetic field generating component for providing a magnetic field so that the coated product is located in the magnetic field; and a current generating assembly for making an electric current pass through the coated product so that the direction of the Ampere force experienced by the coated product in the magnetic field points to the cooling assembly.

[0012] The coated product can be regarded as a charged conductor after being electrified, and the charged conductor will be affected by the Ampere force in the magnetic field. Since the Ampere force acting on the coated product is directed to the cooling assembly, the coated product can be closely attached to the cooling assembly, that is, the gap between the coated product and the cooling assembly is small or non-existent, so that the cooling assembly uniformly cools each region of the coated product, thereby reducing the probability of film surface deformation and improving the yield of the coated product.

[0013] In addition, the coated product is attached to the surface of the cooling assembly by electrostatic adsorption. Since the electrostatic force is small, there is a certain gap between the coated product and the cooling assembly, and the cooling amplitude of the cooling assembly on the coated product is small. Therefore, when the high-temperature metal vapor reaches the coated product, the film surface of the coated product is prone to be damaged by heat. In the present scheme, the Ampere force is large, so the coated product affected by the Ampere force can be closely attached to the cooling assembly, thereby reducing the probability of film surface deformation and improving the yield of the coated product.

[0014] In addition, the coated product is attached to the surface of the cooling assembly by electrostatic adsorption. Since the electrostatic force is small, there is a certain gap between the coated product and the cooling assembly, and the cooling amplitude of the cooling assembly on the coated product is small. Therefore, when the high-temperature metal vapor reaches the coated product, the film surface of the coated product is prone to be damaged by heat. In the present scheme, the Ampere force is large, so the coated product affected by the Ampere force can be closely attached to the cooling assembly, thereby reducing the probability of film surface deformation and improving the yield of the coated product.

[0015] In some embodiments of the present application, the current generating assembly includes at least one first roller and a second roller corresponding to the first roller, wherein the polarity of the charge carried by the first roller and the second roller is opposite. Therefore, when the coated product is connected to the first roller and the second roller to form a current path between the rollers, the current between the first roller and the corresponding second roller will flow through the coated product.

[0016] In some embodiments of the present application, a plurality of first rollers are arranged along a first direction, and a plurality of second rollers are arranged along a second direction. The first direction is parallel to the second direction, and the first direction and the second direction are parallel to the surface of the coated product. The first direction intersects the direction of the magnetic field and is parallel to the surface of the coated product.

[0017] By this arrangement, the first rollers and the second rollers are oppositely arranged, and the distance between each first roller and the surface of the coated product is equal, and the distance between each second roller and the surface of the coated product is equal. The coated product contacts the first rollers and the corresponding second rollers to form a current path, which can form multiple currents on the coated product, and thus the coated product can be approximately regarded as multiple charged conductors subjected to Ampere force. In addition, since the arrangement direction of the rollers intersects with the direction of the magnetic field, the Ampere force received by the coated product is not zero.

[0018] In some embodiments of the present application, since the distance between any adjacent first rollers is equal to the distance between any adjacent second rollers, multiple uniformly arranged currents can be formed on the coated product, so that the coated product is subjected to uniformly arranged Ampere force, thereby making the coated product closely fit the cooling assembly, the surface is more flat, and the cooling is more uniform, thereby improving the yield of the coated product.

[0019] In some embodiments of the present application, the current generating assembly is arranged in contact with the metal film to charge the metal film, which can be regarded as a charged conductor.

[0020] In some embodiments of the present application, the magnetic field generating component includes a conductive coil or a magnet.

[0021] In some embodiments of the present application, the cooling assembly includes a containing cavity for containing the plurality of magnetic field generating components, wherein the plurality of magnetic field generating components are arranged in layers along the radial direction of the containing cavity, the plurality of magnetic field generating components in each layer are arranged along the circumferential direction of the containing cavity, and there is a gap between adjacent magnetic field generating components in each layer, and the gaps of adjacent two layers are arranged in a staggered manner.

[0022] In some embodiments of the present application, the direction of the current on the coated product is perpendicular to the direction of the magnetic field, so that in the case of the same current size and the same magnetic induction intensity, the Ampere force received by the coated product is the largest.

[0023] In some embodiments of the present application, the magnetic field generating component is a conductive coil, and correspondingly, the coated product device further includes a power supply assembly for adjusting the current of the conductive coil to adjust the magnetic induction intensity, so that the size of the magnetic induction intensity can be adjusted according to the actual production needs.

[0024] According to the second aspect of the present application, the present application also provides a production system, which includes any coated product device of the first aspect. For example, the production system can be a composite current collector production line deployed with the coated product system, or other production lines requiring evaporation process.

[0025] The above description is only a summary of the technical solutions of the present application. In order to make the technical means of the present application more clear and understandable, and to make the above and other purposes, characteristics and advantages of the present application more obvious and easy to understand, the following will describe the specific embodiments of the present application in detail. BRIEF DESCRIPTION OF DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments or exemplary technical descriptions. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort on the basis of these drawings.

[0027] Fig. 1 is an application schematic diagram of a coating device;

[0028] Fig. 2 is a structural schematic diagram of a coating device according to some embodiments of the present application;

[0029] Fig. 3 is a force schematic diagram of a coated product according to some embodiments of the present application;

[0030] Fig. 4 is a structural schematic diagram of a current generating assembly according to some embodiments of the present application;

[0031] Fig. 5 is a structural schematic diagram of a current generating assembly according to some other embodiments of the present application;

[0032] Fig. 6a is an arrangement schematic diagram of a coating device and a coated product according to some embodiments of the present application;

[0033] Fig. 6b is an arrangement schematic diagram of a coating device and a coated product according to some other embodiments of the present application;

[0034] Fig. 7a is a front schematic diagram of a coating device according to some embodiments of the present application;

[0035] Fig. 7b is a front schematic diagram of a coating device according to some other embodiments of the present application;

[0036] Fig. 8 is an application schematic diagram of a power supply assembly according to some embodiments of the present application;

[0037] Fig. 9 is a structural schematic diagram of a production system according to some embodiments of the present application. DETAILED DESCRIPTION

[0038] The embodiments of the technical solutions of the present application will be described in detail below with reference to the drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present application, and therefore only serve as examples, but cannot limit the protection scope of the present application.

[0039] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of this application; the use of the terms "including," "comprising," or "having" and variations thereof herein is intended to be broad and encompass the terms "consisting of" and "consisting essentially of" and variations thereof. Unless otherwise required by context, singular terms shall include pluralities and vice versa. Unless otherwise required by context, the use herein of the singular is also to be construed as a use of the plural and vice versa.

[0040] In the description of the embodiments of the present application, the technical terms "first", "second" and the like are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the technical features indicated. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise explicitly and specifically limited.

[0041] Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearance of the phrase in various places in the specification is not necessarily all referring to the same embodiment, nor is it necessarily a separate or alternative embodiment to other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined.

[0042] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which can represent the three cases of A alone, A and B together, and B alone. In addition, the character " / " in this paper generally represents that the front and rear associated objects are a "or" relationship.

[0043] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two), and similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0044] In order to facilitate the understanding of the scheme in the present application, the background art of the present application is explained as follows:

[0045] The current metalized composite current collector has broad application prospects in the field of new energy. The composite current collector includes a "metal-substrate-metal" three-layer composite structure, which is usually made by forming a nanoscale metal film on the surface of the substrate using evaporation plating.

[0046] The evaporation process of the composite current collector and other plating products is as follows: the plating product is attached to the surface of a cooling drum, and the cooling drum cools the plating product. The high-temperature metal vapor generated by the electron gun irradiating the target material forms a few nanometer thin film on the surface of the plating product when it is cooled. After repeated evaporation, a plating product with a metal film thickness of several microns is finally prepared.

[0047] But in the actual evaporation process, the metal vapor temperature is too high, the film surface of the plated product is prone to deformation due to heat, such as film surface damage, resulting in a low yield of the plated product; or, as shown in FIG. 1, the plated product 101 (including a substrate 1011 and a metal film 1012) is pulled by a cooling drum 102 and a roller (shown as a roller 1031 and a roller 1032 in FIG. 1), and the film surface is prone to deformation such as wrinkles, which also results in a low yield of the plated product.

[0048] Therefore, how to improve the yield of the plated product is a technical problem to be solved at present.

[0049] Researchers have studied the above technical problems. On the one hand, researchers believe that the metal vapor temperature is too high, or the substrate 1011 material and the metal film 1012 material have poor heat resistance, which leads to easy film surface damage of the plated product 101 due to heat. Under the premise of ensuring the performance of the plated product 101, researchers reduce the metal vapor temperature by reducing the electron beam intensity, or replace the substrate 1011 material and the metal film 1012 material with better heat resistance, but find that the plated product 101 still has film surface damage, such as pinhole-shaped damage.

[0050] On the other hand, researchers believe that the plated product 101 is pulled by the cooling drum 102 and the roller, and the thickness of the plated product 101 is reduced due to the pulling force, which leads to easy heat damage when contacting the high-temperature metal vapor. The pulling force of the cooling drum 102 and the roller is concentrated at the position where the cooling drum 102 and the roller contact the plated product 101, and the uneven distribution of force leads to easy deformation such as wrinkles on the film surface of the plated product 101. Therefore, researchers try to reduce the pulling force by reducing the rotation speed of the cooling drum 102 and the roller, and changing the relative position between the cooling drum 102 and the roller, but this seriously affects the normal production cycle of the plated product 101, and still does not significantly improve the film surface deformation problem of the plated product 101.

[0051] After the above attempts, researchers found through repeated experiments that the plated product 101 is electrostatically adsorbed and attached to the cooling drum 102. Due to the small electrostatic adsorption force, there is a gap between the plated product 101 and the cooling drum 102, which leads to a small cooling amplitude of the cooling drum 102 on the plated product 101. Therefore, when the high-temperature metal vapor reaches the plated product 101, the film surface of the plated product 101 is prone to heat damage.

[0052] In addition, the tension generated by the cooling drum 102 and the roller conveyor 101 in the process of coating the product 101 on the cooling drum 102 causes the product 101 to be unevenly pulled, which easily causes the product 101 to be deformed, such as wrinkling. The wrinkles cause the gap between the product 101 and the cooling drum 102 to be uneven, and the parts of the product 101 that are protruding due to the wrinkles are cooled at a larger rate than the parts of the product 101 that are not in close contact with the cooling drum 102 due to the wrinkles. When the high-temperature metal vapor reaches the product 101, the parts of the product 101 that are cooled at a smaller rate are easily damaged by the heat.

[0053] The present application provides a coating device to improve the yield of the coated product. The coating device in the present application refers to a device for coating a metal film on a substrate. The coating device generally comprises a vacuum chamber, an electron gun, and a conveying device. In the vacuum chamber, the substrate is placed on the conveying device, the electron gun emits an electron beam to evaporate and melt the target material to form metal vapor, and the metal vapor is deposited on the surface of the substrate to form a metal film. The coating device in the present application can be integrated in an electron gun evaporation machine, an electron beam evaporation vacuum chamber, or other evaporation systems.

[0054] In addition, the coating device in the present application is used to prepare a coated product, which refers to a product with a metal film coated on the surface of a substrate, such as a composite current collector, an optical component, a wafer, and the like. As shown in FIG. 2, the coated product 101 in the present application comprises a substrate 1011 and a metal film 1012 (the present application shows that the substrate 1011 has a metal film 1012 coated on one side, and of course the other side of the substrate 1011 can also be coated with a metal film to form a three-layer composite structure). The substrate 1011 in the present application refers to a base material used to support and carry other materials during the coating process, including but not limited to flexible materials such as polypropylene, polyethylene terephthalate, polyethylene, and the like. The metal film 1012 in the present application refers to a thin film made of metal or alloy materials, which has a thickness of several nanometers to several microns.

[0055] It should be further noted that the thickness of the metal film required for the preparation of the composite current collector is generally microns, while the metal film formed by each evaporation in the actual evaporation process is only tens of nanometers, so it is necessary to coat the film repeatedly to deposit the metal film to the required thickness. In addition, during the coating process of the composite current collector, a metal layer is evaporated and sputtered to improve the adhesion, so as long as the surface of the substrate has been coated with a metal film, the coating device provided in the present application can be used to make the coated product closely contact with the cooling assembly, reduce the probability of deformation of the film surface of the coated product, and improve the yield of the product.

[0056] The coating device provided by the present application is described below. As shown in FIG. 2, the coating device 20 includes a cooling assembly 201 and a current generating assembly 202. The cooling assembly 201, also referred to as a cooling drum or a cooling roller, is composed of multiple components and is mainly used to reduce the temperature of the equipment or product. The current generating assembly 202 is composed of multiple components and is mainly used to generate current.

[0057] The cooling assembly 201 includes at least one magnetic field generating component (indicated by magnetic field generating components C1-Cn in the drawings of the present application), which is used to provide a magnetic field B so that the coated product 101 is located in the magnetic field B.

[0058] It should be noted that the magnetic induction lines shown by the dashed lines in the drawings of the present application represent the magnetic field B. The magnetic induction lines are closed curves used to describe the distribution of the magnetic field B and do not actually exist. The tangent direction of any point on the magnetic induction lines is the same as the direction of the magnetic field B at this point. The magnetic field B of the present application refers to a field that transmits the magnetic force between objects. In the present application, "locating the coated product 101 in the magnetic field B" means locating part or all of the coated product in the magnetic field B.

[0059] For example, as shown in FIG. 2, the cooling assembly 201 further includes a cooling component 2012 for cooling the coated product 101. The cooling component 2012 can include a shell and a liquid cooling pipe arranged inside the shell. The shell is generally cylindrical in shape to facilitate the transfer of the coated product. When the coated product needs to be cooled, the liquid circulates in the liquid cooling pipe to cool the shell of the cooling assembly 201, thereby cooling the coated product attached to the shell.

[0060] The current generating assembly 202 is used to pass current through the coated product 101 so that the direction of the Ampere force F experienced by the coated product 101 in the magnetic field B points to the cooling assembly 201.

[0061] It should be noted that "current passing through the coated product" in the case where the base material 1011 is made of insulating material refers to the existence of current in the metal film 1012. The Ampere force F refers to the force experienced by the current-carrying conductor in the magnetic field B.

[0062] As shown in FIG. 3, the substrate 1011 is an insulating material, and the "current passing through the plated product 101" refers to the current I passing through the metal film 1012. For the convenience of observation, the substrate 1011, the metal film 1012 and the cooling assembly 201 are shown at a certain distance from each other in the figure, which does not mean that the two are not in contact. When the metal film 1012 has the current I, the moving charges in the current I themselves have a magnetic field and can be regarded as a magnet, so in the magnetic field B generated by the magnetic field generating assembly, the moving charges will be subjected to the Lorentz force. Because there are many such moving charges in the metal film 1012, the Lorentz forces received by the charges are superimposed on each other, forming the macroscopic Ampere force F. According to the left-hand rule and the direction of the current I and the direction of the magnetic field B shown by the arrows in FIG. 3, it can be judged that the direction of the Ampere force F received by the metal film 1012 points to the cooling assembly 201, so that the plated product 101 is attached to the cooling assembly 201 in the present application, reducing the gap between the plated product 101 and the cooling assembly 201, thereby reducing the probability of damage to the film surface of the plated product 101 due to heat, and improving the yield of the plated product 101.

[0063] In addition, compared with the force generated by electrostatic adsorption, the Ampere force F is larger, so that the metal film 1012 in the present application can be more closely attached to the cooling assembly 201, and the cooling assembly 201 has a larger cooling amplitude for the plated product 101; compared with the way of attaching the plated product to the cooling assembly 201 by traction force during the conveying process of the plated product, the distribution of the Ampere force F will not be concentrated in the position where the plated product 101 and the cooling drum 102 and the over roller contact as shown in FIG. 1. Therefore, the plated product 101 in the present application can be more uniformly attached to the cooling assembly 201, reducing the probability of wrinkles on the film surface, and further, the plated product 101 with less or no wrinkles has a distance from the cooling assembly 201 that is substantially uniform, which can be more closely attached to the cooling assembly 201, reducing the probability of damage to the film surface of the plated product 101 due to heat, and improving the yield of the plated product 101.

[0064] The above-mentioned current generating assembly 202 can be flexibly set in its components and arrangement position according to requirements, which will be described below in conjunction with embodiments:

[0065] In some embodiments of the present application, the current generating assembly 202 includes at least one first roller and a second roller corresponding to the first roller, wherein the polarity of the charges carried by the first roller and the second roller is opposite.

[0066] It should be noted that the first roller and the second roller are a kind of cylindrical device for supporting and transporting objects, and the roller can rotate along its roller shaft to realize the function of transporting objects. The first roller and the second roller are made of conductive material and are respectively connected to electrodes with different polarities to carry charges with opposite polarities, so that the first roller and the corresponding second roller can form a current when connected by a conductor.

[0067] For example, as shown in FIG. 5, the current generating assembly 202 includes a single first roller and a single second roller, the first roller is positively charged and the second roller is negatively charged. The two rollers are arranged on opposite sides of the metal film 1012 and are in communication with the metal film 1012, and form a current I1 on the metal film 1012.

[0068] In some embodiments of the present application, the plurality of first rollers are arranged along a first direction, the plurality of second rollers are arranged along a second direction, the first direction is parallel to the second direction, the first direction intersects the direction of the magnetic field and the first direction is parallel to the surface of the plated product. The first direction and the second direction herein can be parallel to the direction in which the current generating assembly transports the plated product.

[0069] For example, as shown in FIG. 5, the current generating assembly 202 includes a single first roller and a single second roller, the first roller is positively charged and the second roller is negatively charged. The two rollers are arranged on opposite sides of the metal film 1012 and are in communication with the metal film 1012, and form a current I1 on the metal film 1012.

[0070] With this arrangement, the first rollers and the second rollers are oppositely arranged, and each first roller is equidistant from the surface of the plated product, and each second roller is equidistant from the surface of the plated product. The plated product contacts the first rollers and the corresponding second rollers to form a current path, which can form multiple currents on the plated product, thereby allowing the plated product to be approximately regarded as multiple charged conductors subjected to Ampere force. In addition, since the arrangement direction of the rollers intersects the direction of the magnetic field, the Ampere force acting on the plated product is not zero.

[0071] In some embodiments of the present application, the distance between any adjacent first rollers is equal to the distance between any adjacent second rollers.

[0072] As shown in FIG. 5, the distance between any two adjacent first rollers is the same, all being a first length L1; the distance between any two adjacent second rollers is the same, all being a second length L2, and the first length L1 is equal to the second length L2. The first roller A11 contacts the metal film 1012 with the second roller A21 to make the current I1 pass through the metal film 1012, the first roller A12 contacts the metal film 1012 with the second roller A22 to make the current I2 pass through the metal film 1012, and the first roller A13 contacts the metal film 1012 with the second roller A23 to make the current I3 pass through the metal film 1012.

[0073] As shown in FIG. 5, since the distance between the two adjacent rollers in the same direction is the same, the currents I1-I3 on the metal film 1012 are uniformly arranged, thereby allowing the plated product 101 to be uniformly subjected to the Ampere force F.

[0074] In addition, according to the calculation formula of the Ampere force F, in the case that the magnetic induction intensity of the magnetic field B, the intensity of the current I formed by each pair of rollers on the metal film 1012, and the included angle between the intensity direction of the current I and the direction of the magnetic induction intensity are the same, if the length of the current path on the metal film 1012 is the same, the Ampere force F received by each region on the metal film 1012 is not only uniformly arranged, but also the size of the Ampere force F is the same. Therefore, the arrangement mode of FIG. 5 can make the plated film product 101 uniformly and closely adhere to the cooling assembly 201.

[0075] In some embodiments of the present application, the current generating assembly is in contact with the metal film.

[0076] It can be understood that the contact here refers to that the surface of the current generating assembly is in complete contact or has a certain gap with the surface of the metal film. The existing gap should meet the requirement that the current generating assembly can make the current pass through the metal film.

[0077] As shown in FIG. 4, the current generating assembly includes a first roller A11 and a corresponding second roller A21, which are in contact with the metal film 1012 to make the current I1 pass through the metal film 1012.

[0078] It should be noted that, in addition to the arrangement of the cooling assembly 201, the metal film 1012, the base material 1011 and the current generating assembly 202 in sequence as shown in FIG. 2, the current generating assembly (shown by the first roller A11 and the second roller A21 in FIG. 6a), the metal film 1012 and the base material 1011 can be arranged in sequence as shown in FIG. 6a, the cooling assembly 201 is in contact with the metal film 1012, or the current generating assembly 202, the metal film 1012, the base material 1011 and the cooling assembly 201 are arranged in sequence as shown in FIG. 7b.

[0079] In addition to the above-mentioned current generating assembly, the magnetic field generating assembly can also be flexibly arranged in terms of its components and arrangement position, which will be described below in conjunction with examples:

[0080] In some embodiments of the present application, the magnetic field generating assembly includes a conductive coil or a magnet.

[0081] It should be noted that the conductive coil is a winding of conductive wire in the form of a ring. After the conductive coil is electrified, a magnetic field is formed in the coil and the surrounding space. Further, in order to improve the magnetic induction intensity, a metal core can be placed in the coil, for example, a metal material with a relative magnetic permeability greater than 10, and the metal core material can be selected from Fe, Co, Ni and other metals or alloys. The structure and shape of the conductive coil can be designed as needed.

[0082] A magnet is a substance with magnetic properties that can attract metals such as iron, nickel, and cobalt. Magnets are usually made of metals such as iron, nickel, and cobalt, and can also contain other materials such as rare earth elements. The magnetic induction strength and direction of the magnetic field can be adjusted by changing the shape and structure of the magnet.

[0083] In some embodiments of the present application, the cooling assembly includes a receiving cavity for accommodating a plurality of magnetic field generating components, wherein the plurality of magnetic field generating components are arranged in layers along the radial direction of the receiving cavity, the plurality of magnetic field generating components in each layer are arranged along the circumferential direction of the receiving cavity, and there is a gap between adjacent magnetic field generating components in each layer, and the gaps of adjacent two layers are staggered.

[0084] It should be noted that the receiving cavity refers to an object with a circular cross-section, the radial direction refers to the radius direction of the circular cross-section, and the circumferential direction refers to the circumference direction of the circular cross-section. For example, the cooling assembly can be a cooling drum, and the receiving cavity is a cylindrical shell in the cooling drum that accommodates a plurality of magnetic field generating components. The cylindrical shell also accommodates a plurality of liquid cooling pipes for cooling the surface of the cooling drum.

[0085] For example, as shown in FIGS. 7a and 7b, the cooling assembly 201 includes at least one magnetic field generating component (C1-C16 in FIGS. 7a and 7b) and a receiving cavity 701 for accommodating a plurality of magnetic field generating components. The magnetic field generating components are arranged in two layers along the radial direction, and the first layer of magnetic field generating components are arranged circumferentially as C1-C8, and the second layer of magnetic field generating components are arranged circumferentially as C9-C16. The current generating assembly 202 includes first rollers A11-A17 and corresponding second rollers. The coated product 101 is located in the space between the receiving cavity 701 and the current generating assembly 202.

[0086] It should be noted that FIG. 7a does not show the second rollers because it is a front view and the second rollers are arranged opposite to the first rollers. In addition, for ease of observation, only the magnetic field B provided by part of the magnetic field generating components is shown in FIGS. 7a and 7b. In fact, each magnetic field generating component in FIGS. 7a and 7b can generate a magnetic field B.

[0087] As can be seen from FIG. 7a, there is a gap between adjacent magnetic field generating components in each layer. This is because if there is no gap between the magnetic field generating components to form a closed annular magnet (conductive coil or magnet), the magnetic field B only exists inside the annular magnet, and there is no magnetic field B outside the magnet.

[0088] As shown in FIG. 7b, the gaps between adjacent two layers are staggered, that is, the place where the magnetic field B provided by the magnetic field generating component in each layer is not covered is covered by the magnetic field B provided by other magnetic field generating component in the adjacent layer, so that the magnetic field B provided by each magnetic field generating component is complementary, and thus each energized area of the metal film 1012 is located in the magnetic field B and is affected by the Ampere force F.

[0089] It is worth mentioning that if the cooling assembly 201 includes a liquid cooling pipe, the gap between the magnetic field generating components in the foregoing embodiments can be designed to allow the liquid cooling pipe to pass through the gap, facilitating the integrated design of the cooling assembly 201. In addition, if the magnetic field generating component is a conductive coil, the liquid cooling pipe can also cool the conductive coil.

[0090] It is also worth mentioning that, referring to FIG. 7b, the Ampere force F acting on the metal film 1012 not only makes the metal film 1012 adhere to the substrate 1011 closely, but also makes the coated product 101 adhere to the cooling drum closely, thereby improving the cooling effect of the cooling drum on the coated product 101, reducing the probability of film surface deformation, and improving the yield of the coated product 101.

[0091] In some embodiments of the present application, the cooling assembly is a cooling drum, the relative magnetic permeability of the heat-conducting layer on the outer surface of the cooling drum is less than a first threshold value, and the thermal conductivity of the heat-conducting layer is greater than a second threshold value.

[0092] It can be understood that, since the magnetic field generating components are arranged inside the cooling drum, the magnetic field provided by the magnetic field generating components will pass through the outer surface of the cooling drum. Therefore, to avoid the material on the outer surface of the cooling drum interfering with the magnetic field provided by the magnetic field generating components, the heat-conducting layer should be made of a weak magnetic material with small relative magnetic permeability. In addition, since the cooling drum is used to cool the coated product, the heat-conducting layer on the outer surface of the cooling drum should have good heat-conducting performance, such as a material with a thermal conductivity greater than 100 W / (m·K).

[0093] It should be noted that, if the heat-conducting layer on the outer surface of the cooling drum is a metal material, to avoid short-circuiting the first roller and the second roller, the outer surface of the cooling drum should be spaced apart from the first roller and the second roller by a certain distance. In addition, to reduce the influence on the current flowing through the metal film, the metal film and the outer surface of the cooling drum should be insulated, for example, as shown in FIG. 7a, the insulating substrate 1011 is arranged between the metal film 1012 and the outer surface of the cooling drum.

[0094] In some embodiments of the present application, the cooling device is a cooling drum, and the cooling assembly further includes a support, which is located in the cooling drum and is used to support and fix each magnetic field generating component.

[0095] It should be noted that, if the magnetic field generating component is a conductive coil, the support can be made of a material with high thermal conductivity to support the conductive coil and exchange heat with the conductive coil.

[0096] The size and direction of the Ampere force in each of the above embodiments can be flexibly set by adjusting the current direction and the magnetic field direction, which will be described below in conjunction with the embodiments:

[0097] In some embodiments of the present application, the current direction on the coated product intersects with the direction of the magnetic field.

[0098] According to the Ampere force calculation formula, if the current direction on the coated product is parallel to the direction of the magnetic field, then according to the Ampere force calculation formula, the Ampere force is equal to 0, and if the current direction of the charged conductor intersects with the direction of the magnetic field, then according to the Ampere force calculation formula, the Ampere force on the current is greater than zero.

[0099] In some embodiments of the present application, the current direction on the coated product is perpendicular to the direction of the magnetic field.

[0100] As shown in FIG. 3, according to the Ampere force calculation formula, in the case that the magnetic induction intensity of the magnetic field B, the current I intensity and the current path length L are the same, the direction of the current I is perpendicular to the direction of the magnetic field B, and the Ampere force F is the largest.

[0101] In addition to the current generating component 202 and the magnetic field generating component, the coating device 20 also includes other components:

[0102] In some embodiments of the present application, the magnetic field generating component is a conductive coil, and accordingly, referring to FIG. 8, the coating device 20 further includes:

[0103] The power supply component 801 is used to adjust the current of the conductive coil to adjust the magnetic induction intensity, and further adjust the size of the Ampere force F on the metal film 1012.

[0104] It can be understood that the power supply component 801 here refers to a device composed of multiple components for providing power to the conductive coil. According to the magnetic induction intensity calculation formula, the current size is positively correlated with the magnetic induction intensity, so the magnetic induction intensity can be adjusted by adjusting the current size of the conductive coil.

[0105] For example, the power supply component provides power to a conductive coil, referring to FIG. 8, the power supply component 801 includes a power supply 8011 and a slide rheostat 8012, wherein the power supply 8011, the slide rheostat 8012 and the conductive coil C1 are connected in series, and the current size of the conductive coil can be adjusted by adjusting the resistance value of the slide rheostat 8012.

[0106] Based on the same technical concept, the present application also provides a production system, as shown in FIG. 9, the production system 90 includes any of the above coating devices 20, and the implementation of the production system 90 can refer to the above embodiments of the coating device 20, and the repeated parts will not be described here.

[0107] In addition, those skilled in the art should know that the production system 90 shown in FIG. 9 is a collection of hardware devices, software programs and production resources for manufacturing products, such as a composite current collector production line deployed with the coating device 20, or a production line requiring a coating process in other scenarios, and the present application does not limit this.

[0108] It should be understood that the above embodiments are only used to illustrate the technical solutions of the present application, but not limit them. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacements for part or all of the technical features. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should be covered in the scope of the claims and the specification of the present application. In particular, as long as there is no structural conflict, the technical features mentioned in each embodiment can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

[0109] The above embodiments are only used to illustrate the technical solutions of the present application, but not limit them. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacements for part or all of the technical features. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should be covered in the scope of the claims and the specification of the present application. In particular, as long as there is no structural conflict, the technical features mentioned in each embodiment can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A coating apparatus for producing a coated product, wherein, The coated product comprises a substrate and a metal film, and the coating device comprises: a cooling assembly for cooling the coated product, wherein the cooling assembly comprises at least one magnetic field generating component for providing a magnetic field so that the coated product is located in the magnetic field; and a current generating assembly for passing current through the coated product so that the direction of the Ampere force experienced by the coated product in the magnetic field points to the cooling assembly.

2. The coating apparatus according to claim 1, wherein The current generating assembly comprises at least one first roller and a second roller corresponding to each first roller, wherein the polarity of the charge carried by the first roller is opposite to that of the second roller.

3. The coating apparatus of claim 2, wherein A plurality of first rollers are arranged along a first direction, and a plurality of second rollers are arranged along a second direction, wherein the first direction is parallel to the second direction, the first direction intersects the direction of the magnetic field, and the first direction is parallel to the surface of the coated product.

4. The coating apparatus according to claim 2 or 3, characterized in that, The distance between any adjacent first rollers is equal to the distance between any adjacent second rollers.

5. The coating apparatus according to any one of claims 1 to 4, wherein The current generating assembly is arranged in contact with the metal film.

6. The coating apparatus according to any one of claims 1 to 5, wherein The magnetic field generating component comprises an electrically conductive coil or a magnet.

7. The coating apparatus of claim 6, wherein The cooling assembly comprises a containing cavity containing a plurality of magnetic field generating components, wherein the plurality of magnetic field generating components are arranged in layers along the radial direction of the containing cavity, the plurality of magnetic field generating components in each layer are arranged along the circumferential direction of the containing cavity, and there is a gap between adjacent magnetic field generating components in each layer, and the gaps of adjacent two layers are arranged in an alternating manner.

8. The coating apparatus according to any one of claims 1 to 7, wherein The direction of the current on the coated product is perpendicular to the direction of the magnetic field.

9. The coating apparatus according to any one of claims 6 to 8, wherein The magnetic field generating component is an electrically conductive coil, and correspondingly, the coating device further comprises: a power supply assembly for adjusting the current of the electrically conductive coil to adjust the magnetic induction intensity.

10. A production system characterized by, The coating device comprises any one of claims 1-9.

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