Coating equipment and battery manufacturing equipment

Abstract

The embodiment of the utility model provides coating equipment and battery manufacturing equipment. The coating equipment comprises a first coating unit, a first drying oven, a first compounding unit, a second coating unit, a second drying oven and a second compounding unit which are sequentially distributed, the first coating unit is used for coating a first pressure-sensitive adhesive layer on a first film, and the first drying oven is used for drying the first film coated with the first pressure-sensitive adhesive layer; the first compounding unit is used for compounding a second film to one side, deviating from the first film, of the first pressure-sensitive adhesive layer; the second coating unit is used for coating a second pressure-sensitive adhesive layer on a second film to obtain a semi-finished product, the second drying oven is used for drying the semi-finished product, and the second compounding unit is used for compounding a release film onto the second pressure-sensitive adhesive layer of the semi-finished product to obtain an insulating part. According to the technical scheme provided by the invention, the production efficiency of the insulating part can be improved, and the manufacturing cost is reduced.

Description

Technical Field

[0001] This application relates to the field of battery technology, and more specifically, to a coating apparatus and a battery manufacturing apparatus. Background Technology

[0002] Energy conservation and emission reduction are key to the sustainable development of the automotive industry, and electric vehicles, due to their energy-saving and environmentally friendly advantages, have become an important component of this sustainable development. For electric vehicles, battery technology is a crucial factor in their development.

[0003] In the battery manufacturing process, insulating components are essential materials, providing heat insulation and isolation for the battery. Traditional coating equipment typically has only one coating unit and one oven, allowing only a single layer of pressure-sensitive adhesive to be laminated at a time. For the production of insulating components with two layers of pressure-sensitive adhesive, the coating equipment needs to apply the coating twice. This second coating process involves two loading and unloading operations, leading to complex procedures and low production efficiency. Utility Model Content

[0004] This application provides a coating equipment and a battery manufacturing equipment, which improves the production efficiency of insulating parts and reduces manufacturing costs.

[0005] This application is achieved through the following technical solution:

[0006] In a first aspect, embodiments of this application provide a coating apparatus comprising a first coating unit, a first oven, a first composite unit, a second coating unit, a second oven, and a second composite unit arranged sequentially. The first coating unit is used to coat a first pressure-sensitive adhesive layer onto a first film, and the first oven is used to dry the first film coated with the first pressure-sensitive adhesive layer. The first composite unit is used to composite a second film onto the side of the first pressure-sensitive adhesive layer opposite to the first film. The second coating unit is used to coat a second pressure-sensitive adhesive layer onto the second film to obtain a semi-finished product, and the second oven is used to dry the semi-finished product. The second composite unit is used to composite a release film onto the second pressure-sensitive adhesive layer of the semi-finished product to obtain an insulating component.

[0007] In this scheme, taking the blue film as an insulating component as an example, the coating equipment includes a first coating unit, a first oven, a first laminating unit, a second coating unit, a second oven, and a second laminating unit arranged sequentially. The first coating unit coats a first pressure-sensitive adhesive layer on the first film. Then, the first film enters the first oven. After the first pressure-sensitive adhesive layer on the first film is dried in the first oven, the first laminating unit laminates the first film output from the first oven with a second film. The second film is laminated to one side of the first pressure-sensitive adhesive layer on the first film. Then, the second coating unit coats a second pressure-sensitive adhesive layer on the second film to obtain a semi-finished product. After the semi-finished product enters the second oven for drying, the second laminating unit laminates the semi-finished product output from the second oven with a release film, finally obtaining the blue film. The continuous arrangement of the first coating unit, the first oven, the second coating unit, and the second oven in this scheme allows the coating equipment to have two coating units and two sets of ovens, enabling the coating equipment to achieve two pressure-sensitive adhesive layers in one step without stopping the machine. In this way, to produce the same quantity of blue film, compared to the traditional coating equipment where a single layer of pressure-sensitive adhesive layer needs to be unloaded and reloaded twice during the coating process, resulting in a longer production cycle, the production time of the blue film produced by the coating equipment in this solution is only half that of the traditional coating equipment. It achieves one-time molding production of two layers of pressure-sensitive adhesive blue film, improves the production efficiency of blue film, saves labor costs, significantly reduces equipment energy consumption, reduces waste in production, and lowers the manufacturing cost of blue film.

[0008] According to some embodiments of this application, the coating apparatus further includes a first unwinding unit, a second unwinding unit, and a third unwinding unit. The first unwinding unit is disposed upstream of the first coating unit and is used to provide a first film to the first coating unit. The second unwinding unit is disposed between the first oven and the first composite unit and is used to provide a second film to the first composite unit. The third unwinding unit is disposed between the second oven and the second composite unit and is used to provide a release film to the second composite unit.

[0009] In the above scheme, the first unwinding unit is located upstream of the first coating unit, and serves to store and supply the first film to the first coating unit. The second unwinding unit is located between the first oven and the first laminating unit, and serves to store and supply the second film to the first laminating unit, thereby laminating the first and second films. The third unwinding unit is located between the second oven and the second laminating unit, and serves to store and supply the release film to the second laminating unit.

[0010] According to some embodiments of this application, the first oven and the second oven are stacked in the height direction.

[0011] In the above scheme, by stacking the first and second ovens in the height direction, compared with the first and second ovens being arranged in a straight line, the first and second ovens occupy less space in the length direction, making the coating equipment production line have a U-shaped distribution and a more compact structure.

[0012] According to some embodiments of this application, the second oven is located below the bottom of the first oven, the first oven has a first end and a second end that are relatively distributed in the length direction, the first unwinding unit and the first coating unit are located on one side of the first end of the first oven, and the second unwinding unit, the first composite unit and the second coating unit are located on one side of the second end of the first oven.

[0013] In the above scheme, the second oven is set below the bottom of the first oven. The first unwinding unit and the first coating unit are located at the first end of the first oven, and the second unwinding unit, the first laminating unit and the second coating unit are located on one side of the second end of the first oven. The height of the second oven is lower than that of the first oven, and the second oven is set closer to the first laminating unit and the second coating unit. After the first film is dried in the first oven, it is laminated with the second film and coated with the second pressure-sensitive adhesive layer, and can directly enter the second oven. The displacement in the height direction is smaller, which also reduces the risk of interference in the height direction between the first film after it exits the first oven and the semi-finished product coated with the second pressure-sensitive adhesive layer.

[0014] According to some embodiments of this application, along the length of the second oven, the second oven has a third end and a fourth end that are relatively distributed, the first end of the first oven extends beyond the third end of the second oven, and the second end of the first oven is flush with the fourth end of the second oven.

[0015] In the above scheme, by aligning the second end of the first oven with the fourth end of the second oven, the distances between the second unwinding unit, the first laminating unit, and the second coating unit and the first and fourth ends of the first and second ovens are equal. After the first film, dried in the first oven, is laminated with the second film and coated with the second pressure-sensitive adhesive layer, it can directly enter the second oven for drying, reducing the conveying distance of the semi-finished product outside the second oven. Setting the first end of the first oven beyond the third end of the second oven creates a blank area between them, facilitating the rational arrangement of the third unwinding unit and the second laminating unit. The third unwinding unit and the second laminating unit can be staggered from the first unwinding unit and the first coating unit, resulting in a more rational spatial layout.

[0016] According to some embodiments of this application, the third unwinding unit and the second composite unit are disposed on the lower side of the second oven.

[0017] In the above scheme, the third unwinding unit and the second composite unit are located on one side below the second oven. The semi-finished product after drying in the second oven can be more quickly combined with the release film provided by the third unwinding unit through the second composite unit to obtain the blue film product, and the layout is more reasonable.

[0018] According to some embodiments of this application, the first oven and the second oven have an arched structure.

[0019] In the above scheme, the first and second ovens adopt an arched structure. The arched structure allows for better load-bearing capacity, higher structural stability, and less deformation, thus facilitating the long-term stable operation of the coating equipment. Furthermore, due to the principle of hot air rising, the arched structure of the first and second ovens concentrates the heat source at the center of the surface of the parts to be dried, thereby accelerating moisture evaporation, speeding up the drying of the pressure-sensitive adhesive layer, improving the drying speed and coating quality, and ensuring uniform temperature throughout the oven, reducing the probability of hot and cold areas. More importantly, compared to conventional linear ovens, the arched structure provides a larger vertical clearance between the second oven and the ground, allowing more space for the third unwinding unit and the second composite unit, resulting in a more compact and rational spatial layout of the coating equipment.

[0020] According to some embodiments of this application, the first unwinding unit includes a first unwinding device for providing a first film, a first corona treatment machine, and a dust removal device.

[0021] In the above scheme, by setting up the first corona treatment machine, the first corona treatment machine can perform corona treatment on the surface of the first film released by the first unwinding device, so that the surface of the first film has stronger adhesion, which makes it easier for the first pressure-sensitive adhesive layer to be applied to the first film. The dust removal device can remove dust from the first film, reducing the risk of dust introduction.

[0022] According to some embodiments of this application, the second unwinding unit includes a second unwinding device and a second splicing platform for providing a second film, and the third unwinding unit includes a third unwinding device and a third splicing platform for providing a release film.

[0023] In the above scheme, the second film bonding platform facilitates the bonding of new and old second films provided by the second unwinding device, and the third film bonding platform facilitates the bonding of new and old release films provided by the third unwinding device.

[0024] According to some embodiments of this application, the coating equipment further includes a detection device and a winding unit. The detection device is located downstream of the second composite unit and is used to detect the semi-finished product after composite release film. The winding unit is used to wind up the semi-finished product after it has been detected by the detection device.

[0025] In the above scheme, after the semi-finished product is laminated with the release film in the second composite unit, the appearance of the semi-finished product is inspected by the detection device. After the semi-finished product passes the inspection, it is rolled up, cured and slit into small-sized products for shipment. Defective semi-finished products are screened out to better ensure the quality of the blue film.

[0026] Secondly, embodiments of this application also provide a battery manufacturing apparatus, which includes the coating apparatus of any of the foregoing embodiments.

[0027] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0028] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This is a schematic diagram of the structure of a coating device in the prior art;

[0030] Figure 2 This is a front view of a coating apparatus provided in some embodiments of this application;

[0031] Figure 3 for Figure 2 A schematic diagram of the structure to the left of the AA dividing line of the coating equipment in the diagram;

[0032] Figure 4 for Figure 2 A schematic diagram of the structure to the right of the AA dividing line of the coating equipment;

[0033] Figure 5 This is a schematic diagram of the structure of the insulating element provided in some embodiments of this application.

[0034] Icons: 100-Coating equipment; 10-First unwinding unit; 11-First unwinding device; 12-First splicing platform; 13-First corona treatment machine; 20-First coating unit; 30-First drying oven; 31-First end; 32-Second end; 33-Cooling box; 40-Second unwinding unit; 41-Second unwinding device; 42-Second splicing platform; 50-First laminating unit; 51-Second corona treatment machine; 52-Second dust removal mechanism; 60-Second coating unit; 70-Second drying oven; 71-Third end; 72-Fourth end; 80-Third unwinding unit; 81 - Third unwinding device; 82- Third film splicing platform; 83- Third corona treatment machine; 84- Third dust removal mechanism; 90- Second composite unit; 91- Rewinding unit; 911- First rewinding device; 912- Second rewinding device; 92- Frame; 200- Blue film; 201- First film; 202- First pressure-sensitive adhesive layer; 203- Second film; 204- Second pressure-sensitive adhesive layer; 205- Release film; 300- First unwinding unit; 301- Second unwinding unit; 302- Coating unit; 303- Composite unit; 304- Existing rewinding unit; 305- Drying oven. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0036] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used in the description of this application is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms "comprising" and "having," and any variations thereof, in the description, claims, and accompanying drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the description, claims, or accompanying drawings of this application are used to distinguish different objects, not to describe a specific order or hierarchy.

[0037] In this application, the reference to "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a mutually exclusive, independent, or alternative embodiment. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described in this application can be combined with other embodiments.

[0038] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "attachment" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0039] In this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, in this application, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0040] In this application, "multiple" refers to two or more (including two), and similarly, "multiple groups" refers to two or more (including two), and "multiple pieces" refers to two or more (including two).

[0041] In this application, the battery may include lithium-ion batteries, lithium-sulfur batteries, sodium-lithium-ion batteries, sodium-ion batteries, or magnesium-ion batteries, etc., and the embodiments of this application are not limited thereto. The battery may be cylindrical, flat, cuboid, or other shapes, etc., and the embodiments of this application are not limited thereto.

[0042] The battery mentioned in the embodiments of this application refers to a single physical module comprising one or more battery cells to provide higher voltage and capacity. For example, the battery mentioned in this application may include a battery module or a battery pack. A battery generally includes a housing for encapsulating one or more battery cells. The housing prevents liquids or other foreign matter from affecting the charging or discharging of the battery cells.

[0043] A battery cell includes an electrode assembly and an electrolyte. The electrode assembly consists of a positive electrode, a negative electrode, and a separator. The battery cell primarily functions by the movement of metal ions between the positive and negative electrodes. The positive electrode includes a positive current collector and a positive active material layer. The positive active material layer is coated on the surface of the positive current collector, and the uncoated positive current collector protrudes beyond the coated one, serving as the positive electrode tab. Taking a lithium-ion battery as an example, the positive current collector can be made of aluminum, and the positive active material can be lithium cobalt oxide, lithium iron phosphate, ternary lithium, or lithium manganese oxide, etc. The negative electrode includes a negative current collector and a negative active material layer. The negative active material layer is coated on the surface of the negative current collector, and the uncoated negative current collector protrudes beyond the coated one, serving as the negative electrode tab. The negative electrode current collector can be made of copper, and the negative electrode active material can be carbon or silicon, etc. To ensure that a large current can pass through without melting, there are multiple positive electrode tabs stacked together, and there are multiple negative electrode tabs stacked together. The separator can be made of PP (polypropylene) or PE (polyethylene), etc.

[0044] Currently, during the battery manufacturing process, before the bare cells are installed into a rigid casing, it is necessary to use an insulating component with a relatively soft and flexible material, such as a blue film (i.e., Mylar film). The insulating component wraps around the bare cells, serving as a protective layer on the outside of the bare cells, so that when the cells are placed into the casing, the insulating film of the cells will not scratch them, causing short circuits between the bare cells and the casing.

[0045] Insulating components are indispensable materials in battery production, and battery manufacturers are increasingly demanding them. Improving production efficiency and reducing costs while ensuring product quality are crucial for insulating component manufacturing. Traditional coating equipment, consisting of only one coating unit and one set of ovens, [refer to...]. Figure 1Traditional coating equipment includes a first unwinding unit 300, a second unwinding unit 301, a coating unit 302, a laminating unit 303, a rewinding unit 304, and an oven 305. After the first unwinding unit 300 provides the film, a pressure-sensitive adhesive layer is coated by the coating unit 302, and the film is dried in the oven 305. It is then laminated with the release film from the second unwinding unit 301 and rewound by the rewinding unit 304. When a double-layer pressure-sensitive adhesive composite structure is required, the product from the rewinding unit 304 needs to be transferred back to the first unwinding unit 300. After the release film is peeled off, it is laminated with the film from the first unwinding unit 300, then coated with a second layer of pressure-sensitive adhesive by the coating unit 302, and finally laminated again by the laminating unit. In other words, existing traditional coating equipment can only complete the lamination of a single layer of pressure-sensitive adhesive for insulating components in one production cycle. For insulating components with a two-layer pressure-sensitive adhesive composite structure, traditional coating equipment requires two coating processes, which necessitates machine downtime, increasing time costs, lengthening production cycles, and reducing production efficiency.

[0046] In view of this, in order to solve the problems of low production efficiency and high manufacturing cost of insulating parts in coating equipment, some embodiments of this application provide a coating equipment, which includes a first coating unit, a first oven, a first composite unit, a second coating unit, a second oven, and a second composite unit arranged in sequence. The first coating unit is used to coat a first pressure-sensitive adhesive layer on a first film, and the first oven is used to dry the first film coated with the first pressure-sensitive adhesive layer. The first composite unit is used to composite a second film onto the side of the first pressure-sensitive adhesive layer opposite to the first film. The second coating unit is used to coat a second pressure-sensitive adhesive layer on the second film to obtain a semi-finished product, the second oven is used to dry the semi-finished product, and the second composite unit is used to composite a release film onto the second pressure-sensitive adhesive layer of the semi-finished product to obtain an insulating part.

[0047] In this coating equipment, the continuous arrangement of the first coating unit, the first drying oven, the second coating unit, and the second drying oven allows the equipment to have two coating units and two sets of drying ovens. This enables the equipment to coat two pressure-sensitive adhesive layers in a single operation without stopping the machine. Thus, compared to traditional coating equipment where a single layer of pressure-sensitive adhesive is applied twice during the coating process, resulting in a longer production cycle, the production time for insulating parts using this equipment is only half that of traditional equipment. This achieves one-time production of insulating parts with two layers of pressure-sensitive adhesive, improving production efficiency, saving labor costs, significantly reducing equipment energy consumption, minimizing waste in production, and lowering the manufacturing cost of insulating parts.

[0048] This application provides a coating device; please refer to... Figures 2 to 5The coating equipment 100 includes a first coating unit 20, a first drying oven 30, a first composite unit 50, a second coating unit 60, a second drying oven 70, and a second composite unit 90 arranged sequentially. The first coating unit 20 is used to coat a first pressure-sensitive adhesive layer 202 on a first film 201. The first drying oven 30 is used to dry the first film 201 coated with the first pressure-sensitive adhesive layer 202. The first composite unit 50 is used to composite a second film 203 onto the side of the first pressure-sensitive adhesive layer 202 away from the first film 201. The second coating unit 60 is used to coat a second pressure-sensitive adhesive layer 204 on the second film 203 to obtain a semi-finished product. The second drying oven 70 is used to dry the semi-finished product. The second composite unit 90 is used to composite a release film 205 onto the second pressure-sensitive adhesive layer 204 of the semi-finished product to obtain an insulating component.

[0049] The first film 201 is a PET film, which is a packaging film with relatively comprehensive performance. It has good transparency and gloss; good airtightness and aroma retention; moderate moisture resistance, with moisture permeability decreasing at low temperatures. The second film 203 is also a PET film, and the first film 201 and the second film 203 are made of the same material.

[0050] Please refer to Figure 2 The first composite unit 50 and the second composite unit 90 are composite machines, which are devices that bond two or more layers of materials together with adhesives.

[0051] The first coating unit 20 and the second coating unit 60 refer to coating apparatus, also known as coating machines. Coating machines are mainly used for surface coating processes of films, paper, etc. This machine coats a roll of substrate with a layer of adhesive, paint, or ink with specific functions. Coating machines can be slit coating machines.

[0052] Both the first oven 30 and the second oven 70 are ovens and can have the same structure. An oven is a drying device that provides drying for film sheets and is widely used in battery manufacturing production lines.

[0053] The arrangement of the first oven 30 and the second oven 70 can be in a straight line or in a U-shape, depending on the actual situation.

[0054] With the first oven 30 and the second oven 70 arranged in a straight line along the length, the various mechanisms in the coating equipment 100 are arranged linearly, which facilitates later maintenance. However, the coating equipment 100 occupies a large amount of space along the length.

[0055] When the first oven 30 and the second oven 70 are arranged in a U-shape, the first oven 30 and the second oven 70 can be stacked in a U-shape in the vertical direction or arranged in a U-shape on the horizontal plane. The U-shaped arrangement of the first oven 30 and the second oven 70 allows for effective control of the length of the coating equipment 100, occupies less space, and has a more compact structure.

[0056] In this scheme, taking the blue film 200 as an example, the coating equipment 100 includes a first coating unit 20, a first oven 30, a first composite unit 50, a second coating unit 60, a second oven 70, and a second composite unit 90 arranged sequentially. The first coating unit 20 coats a first pressure-sensitive adhesive layer 202 on the first film 201. Then, the first film 201 enters the first oven 30. After the first oven 30 dries the first pressure-sensitive adhesive layer 202 on the first film 201, the first composite unit 50 composites the first film 201 output from the first oven 30 with a second film 203. The second film 203 is composited on one side of the first pressure-sensitive adhesive layer 202 on the first film 201. Then, the second coating unit 60 coats a second pressure-sensitive adhesive layer 204 on the second film 203 to obtain a semi-finished product. After the semi-finished product enters the second oven 70 for drying, the second composite unit 90 composites the semi-finished product output from the second oven 70 with a release film 205 to finally obtain the blue film 200. The sequential arrangement of the first coating unit 20, the first oven 30, the second coating unit 60, and the second oven 70 in this solution enables the coating equipment 100 to have two coating units and two sets of ovens. The coating equipment 100 can achieve two coatings of pressure-sensitive adhesive layers in a single operation without stopping the machine. Thus, to produce the same quantity of blue film 200, compared to traditional coating equipment where a single layer of pressure-sensitive adhesive layer requires two rounds of feeding and re-feeding during coating, resulting in a longer production cycle, the production time of the blue film 200 produced by the coating equipment 100 in this solution is only half that of traditional coating equipment. This achieves one-time production of two layers of pressure-sensitive adhesive blue film 200, improving production efficiency, saving labor costs, significantly reducing equipment energy consumption, and solving the quality risks of secondary feeding joints, secondary alignment, and film misalignment, as well as the large raw material input losses, which are present in traditional battery cell coating equipment 100. This reduces the manufacturing cost of blue film 200.

[0057] According to some embodiments of this application, the coating apparatus 100 further includes a first unwinding unit 10, a second unwinding unit 40, and a third unwinding unit 80. The first unwinding unit 10 is disposed upstream of the first coating unit 20 and is used to provide a first film 201 to the first coating unit 20. The second unwinding unit 40 is disposed between the first oven 30 and the first composite unit 50 and is used to provide a second film 203 to the first composite unit 50. The third unwinding unit 80 is disposed between the second oven 70 and the second composite unit 90 and is used to provide a release film 205 to the second composite unit 90.

[0058] Please refer to Figure 2 The coating equipment 100 also includes a frame 92. The first unwinding unit 10, the first coating unit 20, the first drying oven 30, the second unwinding unit 40, the first laminating unit 50, the second coating unit 60, the second drying oven 70, the third unwinding unit 80, and the second laminating unit 90 are arranged on the frame 92, forming a complete blue film 200 production line. There are multiple guide rollers between two adjacent production processes to provide conveying and guiding functions for each sub-component in the production process of blue film 200, forming a complete production line.

[0059] The first unwinding unit 10 is located upstream of the first coating unit 20, and serves to store and supply the first film 201 to the first coating unit 20. The second unwinding unit 40 is located between the first oven 30 and the first composite unit 50, and serves to store and supply the second film 203 to the first composite unit 50, thereby laminating the first film 201 and the second film 203. The third unwinding unit 80 is located between the second oven 70 and the second composite unit 90, and serves to store and supply the release film 205 to the second composite unit 90.

[0060] Based on some embodiments of this application, please refer to... Figure 2 , Figure 3 and Figure 4 The first oven 30 and the second oven 70 are stacked in the height direction.

[0061] The first oven 30 and the second oven 70 are stacked in the height direction. The first oven 30 may be located on the bottom side of the second oven 70, or the second oven 70 may be located on the bottom side of the first oven 30, depending on the actual situation.

[0062] By stacking the first oven 30 and the second oven 70 in the height direction, compared with the first oven 30 and the second oven 70 being arranged in a straight line, the first oven 30 and the second oven 70 occupy less space in the length direction, making the coating equipment 100 production line as a whole U-shaped distribution, with a higher structural compactness.

[0063] Based on some embodiments of this application, please refer to... Figure 3 and Figure 4 The second oven 70 is located below the bottom of the first oven 30. The first oven 30 has a first end 31 and a second end 32 that are relatively distributed in the length direction. The first unwinding unit 10 and the first coating unit 20 are located on one side of the first end 31 of the first oven 30. The second unwinding unit 40, the first composite unit 50 and the second coating unit 60 are located on one side of the second end 32 of the first oven 30.

[0064] The lengths of the first oven 30 and the second oven 70 can be equal or unequal. When the lengths of the first oven 30 and the second oven 70 are equal, both ends of the first oven 30 can be flush with or offset from the ends of the second oven 70. When the lengths of the first oven 30 and the second oven 70 are unequal, one end of the first oven 30 can be flush with one end of the second oven 70, while the other end is not.

[0065] The second oven 70 is positioned below the bottom of the first oven 30. The first unwinding unit 10 and the first coating unit 20 are located at the first end 31 of the first oven 30. The second unwinding unit 40, the first composite unit 50, and the second coating unit 60 are located on one side of the second end 32 of the first oven 30. The height of the second oven 70 is lower than that of the first oven 30. The second oven 70 is positioned closer to the first composite unit 50 and the second coating unit 60. After the first film 201 and the second film 203 are laminated and coated with the second pressure-sensitive adhesive layer 204 after drying in the first oven 30, they can directly enter the second oven 70. The displacement in the height direction is smaller, which also reduces the risk of interference in the height direction between the first film 201 after exiting the first oven 30 and the semi-finished product coated with the second pressure-sensitive adhesive layer 204.

[0066] According to some embodiments of this application, along the length direction of the second oven 70, the second oven 70 has a third end 71 and a fourth end 72 that are relatively distributed. The first end 31 of the first oven 30 extends beyond the third end 71 of the second oven 70, and the second end 32 of the first oven 30 is flush with the fourth end 72 of the second oven 70.

[0067] A cooling box 33 is provided on one side of the second end 32 of the first drying oven 30. The cooling box 33 can cool and reduce the temperature of the dried first film 201 and the first pressure-sensitive adhesive layer 202.

[0068] By aligning the second end 32 of the first oven 30 with the fourth end 72 of the second oven 70, the distances between the second unwinding unit 40, the first composite unit 50, and the second coating unit 60 and the first end 31 of the first oven 30 and the fourth end 72 of the second oven 70 are equal. After the first film 201 and the second film 203 are laminated and coated with the second pressure-sensitive adhesive layer 204 after drying in the first oven 30, they can directly enter the second oven 70 for drying, reducing the conveying distance of the semi-finished product outside the second oven 70. By setting the first end 31 of the first oven 30 beyond the third end 71 of the second oven 70, a blank area is formed between the first end 31 of the first oven 30 and the third end 71 of the second oven 70, which facilitates the rational arrangement of the third unwinding unit 80 and the second composite unit 90. The third unwinding unit 80 and the second composite unit 90 can be staggered from the first unwinding unit 10 and the first coating unit 20, resulting in a more rational spatial layout.

[0069] According to some embodiments of this application, please refer to Figure 3 The third unwinding unit 80 and the second composite unit 90 are located on one side below the second oven 70.

[0070] The third unwinding unit 80 and the second composite unit 90 are positioned on one side below the second oven 70. The semi-finished product dried in the second oven 70 can be more quickly composited with the release film 205 provided by the third unwinding unit 80 through the second composite unit 90 to obtain the blue film 200 product, resulting in a more reasonable layout.

[0071] Based on some embodiments of this application, please refer to... Figure 2 , Figure 3 and Figure 4 The first oven 30 and the second oven 70 have an arched structure.

[0072] The arched structure of the first oven 30 and the second oven 70 refers to the arched structure of the first oven 30 and the second oven 70, which are arranged in the opposite direction along the length of the first oven 30 and the second oven 70.

[0073] The first oven 30 and the second oven 70 are designed with an arched structure. This arched structure allows for better load-bearing capacity, higher structural stability, and less susceptibility to deformation, thus promoting the long-term stable operation of the coating equipment 100. Furthermore, due to the principle of hot air rising, the arched structure of the first oven 30 and the second oven 70 concentrates the heat source at the center of the surface of the part to be dried, thereby accelerating moisture evaporation, speeding up the drying of the pressure-sensitive adhesive layer, improving the drying speed and coating quality, and ensuring uniform temperature throughout the oven, reducing the probability of hot and cold areas. More importantly, compared to conventional linear ovens, the arched structure provides a larger vertical clearance between the second oven 70 and the ground, allowing more space for the third unwinding unit 80 and the second composite unit 90, resulting in a more compact and rational spatial layout of the coating equipment 100.

[0074] According to some embodiments of this application, please refer to Figure 3 and Figure 5 The first unwinding unit 10 includes a first unwinding device 11 for providing a first film 201, a first corona treatment machine 13, and a dust removal device.

[0075] The first unwinding device 11 is a device that provides the unwinding function. The first unwinding device 11 has a first film 201 wound on its roller. The first unwinding device 11 provides the first film 201.

[0076] The first unwinding unit 10 may also include a first film splicing platform 12, which is provided with a film splicing mechanism, so that a new first film 201 can be pasted onto an old first film 201 with adhesive strips, thereby achieving continuous production.

[0077] The first corona treatment machine 13, also known as a corona machine, is existing technology and can be directly purchased. The first corona treatment machine 13 is used for surface treatment of plastic film or plastic sheet products, giving the surface of the first film 201 stronger adhesion, making it easier for the pressure-sensitive adhesive layer to be applied to the first film 201.

[0078] The dust removal device refers to the device for removing dust from the first film 201. The dust removal device is existing technology and can be purchased, so it will not be described in detail here.

[0079] By setting the first corona treatment machine 13, the first corona treatment machine 13 can perform corona treatment on the surface of the first film 201 released by the first unwinding device 11, so that the surface of the first film 201 has stronger adhesion, which makes it easier for the first pressure-sensitive adhesive layer 202 to be attached to the first film 201. The dust removal device can remove dust from the first film 201, reducing the risk of dust introduction.

[0080] According to some embodiments of this application, please refer to Figure 4 and Figure 5 The second unwinding unit 40 includes a second unwinding device 41 and a second film bonding platform 42 for providing the second film 203, and the third unwinding unit 80 includes a third unwinding device 81 and a third film bonding platform 82 for providing the release film 205.

[0081] The second unwinding device 41 is a device that provides the unwinding function. The second unwinding device 41 has a second film 203 wound on its roller, and the second unwinding device 41 functions to provide the second film 203.

[0082] The third unwinding device 81 refers to a device that provides the unwinding function. The roller of the third unwinding device 81 is wound with a release film 205, and the third unwinding device 81 serves to provide the release film 205.

[0083] The second film bonding platform 42 is equipped with a film bonding mechanism, which can attach a new second film 203 to an old second film 203 with adhesive strips attached. The third film bonding platform 82 is equipped with a film bonding mechanism, which can attach a new release film 205 to an old release film 205 with adhesive strips attached.

[0084] A second corona treatment machine 51 and a second dust removal mechanism 52 may also be provided downstream of the first composite unit 50 and between the second coating unit 60. The second corona treatment machine 51 works on the same principle as the first corona machine, and the second dust removal mechanism 52 works on the same principle as the first dust removal mechanism.

[0085] A third corona treatment machine 83 and a third dust removal mechanism 84 are also provided between the third unwinding unit 80 and the second composite unit 90.

[0086] The second film bonding platform 42 is provided to facilitate the bonding of new and old second films 203 provided by the second unwinding device 41, and the third film bonding platform 82 is provided to facilitate the bonding of new and old release films 205 provided by the third unwinding device 81.

[0087] According to some embodiments of this application, please refer to Figure 3 The coating equipment 100 also includes a detection device and a winding unit 91. The detection device is located downstream of the second composite unit 90 and is used to detect the semi-finished product after the composite release film 205. The winding unit 91 is used to wind up the semi-finished product after it has been detected by the detection device.

[0088] The inspection device can be an AOI (Automated Optical Inspection) machine. AOI is a device that uses optical principles to detect common defects encountered in battery production. AOI is a relatively new testing technology, but its development is rapid. The AOI testing equipment was purchased and is based on existing technology; therefore, further details about AOI automatic inspection machines will not be provided here.

[0089] The winding unit 91 includes a first winding device 911 and a second winding device 912. The first winding device 911 winds up semi-finished products that have passed the defect detection, and the second winding device 912 winds up semi-finished products that have defects.

[0090] After the semi-finished product passes through the second composite unit 90 and is composited with the release film 205, it undergoes appearance inspection by an inspection device. After passing the inspection, the semi-finished product is rolled up, cured, and slit into small-sized products for shipment. Defective semi-finished products are screened out to better ensure the quality of the blue film 200.

[0091] This application also provides a battery manufacturing apparatus, which includes the coating apparatus 100 of any of the foregoing embodiments.

[0092] In some embodiments, please refer to Figures 2 to 5 The coating equipment 100 includes a first unwinding unit 10, a first coating unit 20, a first drying oven 30, a second unwinding unit 40, a first laminating unit 50, a second coating unit 60, a second drying oven 70, a third unwinding unit 80, and a second laminating unit 90 arranged sequentially. The first unwinding unit 10 is used to provide a first film 201, the first coating unit 20 is used to coat a first pressure-sensitive adhesive layer 202 onto the first film 201, and the first drying oven 30 is used to heat the first film 201 coated with the first pressure-sensitive adhesive layer 202. Drying; the second unwinding unit 40 is used to provide the second film 203, the first composite unit 50 is used to composite the second film 203 onto the side of the first pressure-sensitive adhesive layer 202 opposite to the first film 201; the second coating unit 60 is used to coat the second pressure-sensitive adhesive layer 204 onto the second film 203 to obtain a semi-finished product, the second oven 70 is used to dry the semi-finished product, the third unwinding unit 80 is used to provide a release film 205 to the semi-finished product, and the second composite unit 90 is used to composite the release film 205 onto the second pressure-sensitive adhesive layer 204. The first oven 30 and the second oven 70 are stacked in the height direction, the second oven 70 is located below the bottom of the first oven 30, the first oven 30 has a first end 31 and a second end 32 that are oppositely distributed in the length direction, the first unwinding unit 10 and the first coating unit 20 are located on one side of the first end 31 of the first oven 30, and the second unwinding unit 40, the first composite unit 50 and the second coating unit 60 are located on one side of the second end 32 of the first oven 30.

[0093] The sequential arrangement of the first coating unit 20, the first oven 30, the second coating unit 60, and the second oven 70 in this scheme enables the coating equipment 100 to have two coating units and two sets of ovens. The coating equipment 100 can achieve two coating layers of pressure-sensitive adhesive in a single operation without stopping the machine. Thus, to produce the same quantity of blue film 200, compared to traditional coating equipment where a single layer of pressure-sensitive adhesive requires two rounds of feeding and reloading during the coating process, resulting in a longer production cycle, the production time of blue film 200 with the coating equipment 100 in this scheme is only half that of traditional coating equipment. This achieves one-time production of two layers of pressure-sensitive adhesive blue film 200, improving production efficiency, saving labor costs, significantly reducing equipment energy consumption, minimizing waste in production, and lowering the manufacturing cost of blue film 200. By stacking the first oven 30 and the second oven 70 in the height direction, compared to a straight-line arrangement, the first oven 30 and the second oven 70 occupy less space in the length direction, resulting in a U-shaped overall production line of the coating equipment 100 with higher structural compactness. The second oven 70 is lower than the first oven 30 and is positioned closer to the first composite unit 50 and the second coating unit 60. After the first film 201 and the second film 203 are dried in the first oven 30 and coated with the second pressure-sensitive adhesive layer 204, they can directly enter the second oven 70 with less displacement in the height direction. This also reduces the risk of interference in the height direction between the first film 201 after exiting the first oven 30 and the semi-finished product coated with the second pressure-sensitive adhesive layer 204.

[0094] In some embodiments, along the length of the second oven 70, the second oven 70 has a third end 71 and a fourth end 72 that are relatively distributed. The first end 31 of the first oven 30 extends beyond the third end 71 of the second oven 70, and the second end 32 of the first oven 30 is flush with the fourth end 72 of the second oven 70. The third unwinding unit 80 and the second composite unit 90 are disposed on the lower side of the second oven 70, and the first oven 30 and the second oven 70 have an arched structure.

[0095] The second end 32 of the first oven 30 is flush with the fourth end 72 of the second oven 70. This ensures that the distances between the second unwinding unit 40, the first composite unit 50, and the second coating unit 60 and the first end 31 of the first oven 30 and the fourth end 72 of the second oven 70 are equal. After the first film 201 and the second film 203 are laminated and coated with the second pressure-sensitive adhesive layer 204 after drying in the first oven 30, they can directly enter the second oven 70 for drying, reducing the conveying distance of the semi-finished product outside the second oven 70. The first end 31 of the first oven 30 extends beyond the third end 71 of the second oven 70, creating a blank area between them. This facilitates the rational arrangement of the third unwinding unit 80 and the second composite unit 90. The third unwinding unit 80 and the second composite unit 90 can be staggered from the first unwinding unit 10 and the first coating unit 20, resulting in a more rational spatial layout. The third unwinding unit 80 and the second composite unit 90 are positioned below the second oven 70. The semi-finished product dried in the second oven 70 can be more quickly laminated with the release film 205 provided by the third unwinding unit 80 through the second composite unit 90 to obtain the blue film 200 product, resulting in a more rational layout. The first oven 30 and the second oven 70 adopt an arched structure. The arched structure allows for better load-bearing capacity, higher structural stability, and less deformation, which is more conducive to the long-term stable operation of the coating equipment 100. Furthermore, due to the principle of hot air rising, the arched structure of the first oven 30 and the second oven 70 can concentrate the heat source at the center of the surface of the part to be dried, thereby evaporating moisture more quickly, accelerating the drying of the pressure-sensitive adhesive layer, improving the drying speed and coating quality, and ensuring uniform temperature throughout the oven, reducing the probability of hot and cold areas appearing. More importantly, compared with conventional straight-line ovens, the arched oven structure provides a larger vertical clearance between the second oven 70 and the ground, allowing for more space below the third unwinding unit 80 and the second composite unit 90 to be arranged. The spatial layout of the coating equipment 100 is also more compact and reasonable.

[0096] In some embodiments, the first unwinding unit 10 includes a first unwinding device 11 for providing a first film 201, a first corona treatment machine 13, and a dust removal device. The second unwinding unit 40 includes a second unwinding device 41 and a second splicing platform 42 for providing a second film 203, and the third unwinding unit 80 includes a third unwinding device 81 and a third splicing platform 82 for providing a release film 205. The coating equipment 100 also includes a detection device and a winding unit 91. The detection device is disposed downstream of the second composite unit 90 and is used to detect the semi-finished product after composite release film 205; the winding unit 91 is used to wind up the semi-finished product after detection by the detection device.

[0097] The first corona treatment machine 13 can corona treat the surface of the first film 201 released from the first unwinding device 11, giving the surface of the first film 201 stronger adhesion, which facilitates the subsequent application of the first pressure-sensitive adhesive layer 202 onto the first film 201. The dust removal device can remove dust from the first film 201, reducing the risk of dust introduction. The second film bonding platform 42 provides operating space for the lamination of the second film 203 provided by the second unwinding device 41 with the first pressure-sensitive adhesive layer 202 of the first film 201. The third film bonding platform 82 provides operating space for the lamination of the release film 205 provided by the third unwinding device 81 with the semi-finished product. After the semi-finished product is laminated with the release film 205 by the second lamination unit 90, it undergoes appearance inspection by the detection device. After passing the inspection, the semi-finished product is wound up, cured, and slit into smaller specifications for shipment. Defective semi-finished products are screened out, better ensuring the quality of the blue film 200.

[0098] Although this application has been described with reference to preferred embodiments, various modifications can be made thereto and components can be replaced with equivalents without departing from the scope of this application. In particular, the technical features mentioned in the various embodiments can be combined in any manner, provided there is no structural conflict. This 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 device, characterized in that, The device includes a first coating unit, a first oven, a first laminating unit, a second coating unit, a second oven, and a second laminating unit arranged sequentially. The first coating unit is used to coat a first pressure-sensitive adhesive layer on a first film, and the first oven is used to dry the first film coated with the first pressure-sensitive adhesive layer. The first laminating unit is used to laminate a second film onto the side of the first pressure-sensitive adhesive layer opposite to the first film. The second coating unit is used to coat a second pressure-sensitive adhesive layer on the second film to obtain a semi-finished product, and the second oven is used to dry the semi-finished product. The second laminating unit is used to laminate a release film onto the second pressure-sensitive adhesive layer of the semi-finished product to obtain an insulating component.

2. The coating equipment according to claim 1, characterized in that, The coating equipment also includes: A first unwinding unit is disposed upstream of the first coating unit, and the first unwinding unit is used to provide the first film to the first coating unit; A second unwinding unit is disposed between the first oven and the first composite unit, and the second unwinding unit is used to provide the second film to the first composite unit; A third unwinding unit is disposed between the second oven and the second composite unit, and the third unwinding unit is used to provide the release film to the second composite unit.

3. The coating equipment according to claim 2, characterized in that, The first oven and the second oven are stacked in the height direction.

4. The coating equipment according to claim 3, characterized in that, The second oven is located below the bottom of the first oven. The first oven has a first end and a second end that are distributed opposite each other in the length direction. The first unwinding unit and the first coating unit are located on one side of the first end of the first oven, and the second unwinding unit, the first composite unit and the second coating unit are located on one side of the second end of the first oven.

5. The coating equipment according to claim 4, characterized in that, Along the length of the second oven, the second oven has a third end and a fourth end that are relatively distributed. The first end of the first oven extends beyond the third end of the second oven, and the second end of the first oven is flush with the fourth end of the second oven.

6. The coating equipment according to claim 4, characterized in that, The third unwinding unit and the second composite unit are located on one side below the second oven.

7. The coating equipment according to claim 3, characterized in that, The first oven and the second oven have an arched structure.

8. The coating equipment according to claim 2, characterized in that, The first unwinding unit includes a first unwinding device for providing a first film, a first corona treatment machine, and a dust removal device.

9. The coating equipment according to claim 2, characterized in that, The second unwinding unit includes a second unwinding device and a second splicing platform for providing a second film, and the third unwinding unit includes a third unwinding device and a third splicing platform for providing a release film.

10. The coating equipment according to claim 1, characterized in that, The coating equipment also includes: A detection device is disposed on the downstream side of the second composite unit, and the detection device is used to detect the semi-finished product after the release film is laminated; A winding unit is used to wind up the semi-finished product after it has been detected by the detection device.

11. A battery manufacturing apparatus, characterized in that, The coating apparatus includes any one of claims 1-10.

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