Coating equipment

Abstract

The invention provides a coating device. The coating equipment comprises a coating device and a drying device. The coating device is configured to coat a substrate. And the drying device is used for drying the coating coated on the base material. The drying device comprises a drying chamber and a heating assembly, the drying chamber is used for containing a to-be-dried piece, the drying chamber is provided with a first drying side facing the to-be-dried piece, the first drying side is provided with a plurality of first air inlet parts allowing a fluid medium to enter the drying chamber, and the heating assembly is arranged on the first drying side and is configured to dry the to-be-dried piece. The first drying side is further provided with air return parts, at least one air return part is arranged between every two adjacent first air inlet parts, and the air return parts are configured to enable fluid media in the drying chamber to be discharged out of the drying chamber. The air return part is arranged between the two first air inlet parts and can discharge the fluid medium between the two first air inlet parts and take away heat, the heat is prevented from being gathered between the two first air inlet parts, and the heating uniformity of the to-be-dried part is improved.

Description

[0001] This application is a divisional application based on the invention with application number 2021108761890, application date July 30, 2021, and invention name “Drying device and coating equipment”. Technical Field

[0002] The present application relates to the field of battery technology, and in particular to a drying device and a coating device. Background Art

[0003] With the application and gradual popularization of lithium-ion batteries in the fields of communications, portable electronic products, electric vehicles, aerospace, ships, etc., the requirements for high battery life and safety performance are becoming increasingly strong. This also puts higher requirements on the coating process of lithium-ion power battery pole pieces, especially in the drying process of the pole pieces, which directly affects the molding quality of the pole pieces.

[0004] Therefore, how to improve the drying quality of electrodes has become an urgent problem to be solved in the battery field. Summary of the Invention

[0005] The embodiments of the present application provide a drying device and a coating device to improve the drying quality of electrodes.

[0006] In a first aspect, an embodiment of the present application provides a drying device, comprising a drying chamber and a heating assembly. The drying chamber is used to accommodate items to be dried, and the drying chamber has a first drying side facing the items to be dried, and the first drying side is provided with a plurality of first air inlets for supplying a fluid medium to enter the drying chamber. The heating assembly is disposed on the first drying side, and the heating assembly is configured to dry the items to be dried. The first drying side is further provided with an air return portion, and at least one air return portion is provided between two adjacent first air inlets, and the air return portion is configured to discharge the fluid medium in the drying chamber out of the drying chamber.

[0007] In the above technical solution, at least one return air portion is provided between two adjacent first air inlets, and the return air portion can discharge the fluid medium in the drying chamber out of the drying chamber. When the fluid medium is provided to the drying chamber from the two adjacent first air inlets, the fluid medium acts on the items to be dried and is guided between the two first air inlets by the items to be dried, so that the heat carried by the fluid medium converges between the two first air inlets, causing the corresponding parts between the two adjacent first air inlets to be overheated, resulting in uneven heating of the items to be dried. The return air portion is provided between the two first air inlets, which can discharge the fluid medium between the two first air inlets and take away the heat, thereby avoiding the heat from converging between the two first air inlets and improving the heating uniformity of the items to be dried.

[0008] In some embodiments of the first aspect of the present application, the drying device includes a first wall facing the item to be dried in a first direction, and the first air inlet, the heating assembly and the return air are all arranged on the first wall; the drying device also includes a first drive unit, and the first drive unit is configured to adjust the distance between the first wall and the item to be dried in the first direction.

[0009] In the above technical solution, the first driving unit can drive the first wall on which the first air inlet, heating assembly and return air section are provided to move, so as to adjust the distance between the first wall and the item to be dried in the first direction, thereby adjusting the distance between the heating assembly and the item to be dried, so as to meet different heating requirements and improve the heating quality.

[0010] In some embodiments of the first aspect of the present application, the drying device also includes a first air inlet chamber, which is separated from the drying chamber by a first wall, and the first air inlet part, the heating assembly and the return air part are all arranged on the first wall; wherein, the first air inlet part is used to supply the fluid medium in the first air inlet chamber to enter the drying chamber.

[0011] In the above technical solution, the drying device further includes a first air inlet chamber. After entering the first air inlet chamber, the fluid medium enters the drying chamber through multiple first air inlet portions. This allows the fluid medium to be more evenly distributed within the drying chamber, thereby improving the uniformity of heating the items to be dried. The first air inlet chamber and the drying chamber share a first wall and are separated by the first wall, thereby reducing the size of the drying device.

[0012] In some embodiments of the first aspect of the present application, the drying device further includes a return air chamber and a circulation unit, the return air chamber is configured to accommodate the fluid medium discharged from the return air portion, and the circulation unit is configured to introduce the fluid medium in the return air chamber into the first air inlet chamber.

[0013] In the above technical solution, the fluid medium discharged from the return air section can be accommodated in the return air chamber, and then enters the first air inlet chamber under the action of the circulation unit, so that it can enter the drying chamber through the first air inlet section, and can recycle the heat generated by the heating component in the drying chamber to reduce energy consumption.

[0014] In some embodiments of the first aspect of the present application, the drying chamber further has a second drying side arranged opposite to the first drying side in a first direction, and the second drying side is provided with a plurality of second air inlets for supplying fluid medium into the drying chamber.

[0015] In the above technical solution, the first air inlet can allow the fluid medium to enter the drying chamber from the second drying side of the drying chamber, which can accelerate the flow of the fluid medium in the drying chamber, thereby accelerating the flow of heat in the drying chamber, so that the heat is evenly distributed in the drying chamber, and improving the heating uniformity of the items to be dried.

[0016] In some embodiments of the first aspect of the present application, the drying device includes a first wall facing the items to be dried in the first direction and a second wall arranged opposite to the first wall; the first air inlet, the heating assembly and the return air are all arranged on the first wall, and the second air inlet is arranged on the second wall; the drying chamber is located between the first wall and the second wall in the first direction; the drying device also includes a second driving unit, which is configured to drive the second wall to move to adjust the distance between the second wall and the first wall in the first direction.

[0017] In the above technical solution, the second driving unit can drive the second wall to move to adjust the distance between the second wall and the first wall in the first direction to accommodate items to be dried of different sizes along the first direction.

[0018] In some embodiments of the first aspect of the present application, at least one heating assembly is provided between two adjacent first air inlets.

[0019] In the above technical solution, at least one heating component is arranged between two adjacent first air inlets, so that when the first air inlet provides a fluid medium into the drying chamber, the heat of the heating component can be brought to various positions in the drying chamber as the fluid medium flows, thereby improving the uniformity of heat distribution and thus improving the heating uniformity of the items to be dried.

[0020] In some embodiments of the first aspect of the present application, the drying device includes a blowing portion configured to provide a fluid medium to the heating component to adjust the temperature of the heating component.

[0021] In the above technical solution, the blowing part can provide fluid medium to the heating component to adjust the temperature of the heating component. For example, the blowing part can send cold air to the heating component to cool the heating component, thereby increasing the life of the heating component.

[0022] In some embodiments of the first aspect of the present application, the heating assembly includes a mounting frame and a heating unit, the mounting frame is arranged on the first drying side, and the heating unit and the blowing part are both arranged on the mounting frame.

[0023] In the above technical solution, the heating unit and the blowing part are both arranged on the mounting frame, so that the blowing part is arranged close to the heating unit. The fluid medium entering from the blowing part can act on the heating unit directly or after a short distance, thereby reducing the impact of the fluid medium provided by the blowing part on the temperature in the drying chamber.

[0024] In some embodiments of the first aspect of the present application, the heating assembly further includes a protective member, which is disposed on the mounting frame and surrounds the outer periphery of the heating unit.

[0025] In the above technical solution, the provision of the protective member can separate the heating unit from the workpiece to be dried, thereby preventing the workpiece to be dried from being in direct contact with the heating unit and thereby damaging the workpiece to be dried.

[0026] In some embodiments of the first aspect of the present application, a distance between one of the two first air inlets and the return air portion is equal to a distance between the other of the two first air inlets and the return air portion.

[0027] In the above technical solution, the return air portion is arranged in the middle position between two adjacent first air inlet portions, which is beneficial to improving the uniformity of heat distribution in the drying chamber.

[0028] In a second aspect, an embodiment of the present application provides a coating device, comprising a coating device and a drying device provided in the embodiment of the first aspect. The drying device is used to dry the coating applied on the substrate.

[0029] In the above technical solution, a return air section is provided in the drying chamber of the coating equipment, and the return air section can discharge the fluid medium in the drying chamber into the drying chamber. When the fluid medium is provided into the drying chamber from two adjacent first air inlets, the fluid medium acts on the workpiece to be dried and is guided between the two first air inlets by the workpiece to be dried, so that the heat carried by the fluid medium is gathered between the two first air inlets, causing the corresponding parts between the two adjacent first air inlets to be overheated, so that the heating of the workpiece to be dried is uneven. The return air section is provided between the two first air inlets and can discharge the fluid medium between the two first air inlets and take away the heat, avoiding the heat from gathering between the two first air inlets, thereby improving the heating uniformity of the workpiece to be dried.

[0030] In some embodiments of the second aspect of the present application, the coating device includes a first coating mechanism and a second coating mechanism, the second coating mechanism is arranged downstream of the first coating mechanism, the first coating mechanism is configured to coat the first side of the substrate, and the second coating mechanism is configured to coat the second side of the substrate opposite to the first side; the coating equipment includes two drying devices, one of the two drying devices is arranged downstream of the first coating mechanism and upstream of the second coating mechanism to dry the coating on the first side, and the other of the two drying devices is located downstream of the second coating mechanism to dry the coating on the second side.

[0031] In the above technical solution, one of the two drying devices is used to dry the coating on the first side of the substrate, and the other is used to dry the coating on the second side of the substrate, thereby improving the uniformity of heating the substrate.

[0032] In some embodiments of the second aspect of the present application, the coating equipment further includes a heating device, which is disposed downstream of the drying device located downstream of the second coating mechanism, and the heating device is configured to dry the coating on the second surface.

[0033] In the above technical solution, upstream of the heating device, the coating on the first side and the coating on the second side of the substrate are dried respectively by their corresponding drying devices, wherein when the coating on the second side is dried, the coating on the first side will be dried again, so that the drying degrees of the coating on the first side and the coating on the second side are different, resulting in uneven drying. The heating device can perform a secondary drying on the coating on the second side to make the drying degrees of the coating on the first side and the coating on the second side tend to be consistent, thereby reducing the drying difference between the coating on the first side and the coating on the second side. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0035] Figure 1 It is a structural diagram of a drying device in the prior art;

[0036] Figure 2 A schematic diagram of the structure of the coating equipment provided in some embodiments of the present application;

[0037] Figure 3 A schematic structural diagram of a drying device provided in some embodiments of the present application;

[0038] Figure 4 A simplified structural diagram of a drying device provided in some embodiments of the present application from a first perspective;

[0039] Figure 5 A simplified structural diagram of a drying device provided in some embodiments of the present application from a second perspective;

[0040] Figure 6 A schematic structural diagram of a drying device provided by some embodiments of the present application from a third perspective;

[0041] Figure 7 A schematic structural diagram of a heating assembly provided by some embodiments of the present application from a first perspective;

[0042] Figure 8 A schematic structural diagram of a heating assembly provided by some embodiments of the present application from a second perspective;

[0043] Figure 9 A schematic diagram of the first perspective structure of a heating device provided in some embodiments of the present application;

[0044] Figure 10 A schematic diagram of the heating device according to some embodiments of the present application from a second perspective;

[0045] Figure 11 A schematic structural diagram of a cooling and traction device provided in some embodiments of the present application.

[0046] Icons: 1-dryer; 1a-air inlet; 1b-convergence area; 1c-pole piece; 1000-coating equipment; 100-coating device; 110-first coating mechanism; 120-second coating mechanism; 200-drying device; 20-drying chamber; 201-first drying side; 202-second drying side; 21-heating assembly; 211-mounting frame; 212-fixing slot; 213-heating unit; 214-protective element; 22-first air inlet; 23-return air; 24-first air box; 241-first wall; 242-first air inlet chamber; 243-first box; 244-first air supply port; 25-first A drive unit; 26-outer box; 262-first inlet; 263-first outlet; 264-first exhaust outlet; 27-second air inlet; 28-second air box; 281-second wall; 282-second air inlet chamber; 283-second box body; 284-second air supply outlet; 29-second drive unit; 30-return air chamber; 31-circulation unit; 32-first exhaust unit; 33-first fresh air outlet; 35-first preheating assembly; 36-filter mechanism; 37-blowing unit; 400-unwinding device; 500-first roller assembly; 510-first roller; 600-unwinding correction device; 700-first outlet correction Device; 800-Second outlet correction device; 900-First traction device; 1100-Second traction device; 1200-First surface density measuring device; 1300-Second surface density measuring device; 1400-Heater head correction device; 1500-Climbing device; 1600-Heating device; 1610-Heating box; 1611-Air supply unit; 1612-Exhaust unit; 1613-Second inlet; 1614-Second outlet; 1615-Second exhaust outlet; 1620-Drying assembly; 1630-Transmission roller; 1631-First transmission roller; 1632-Second transmission roller; 1640-Circulation assembly; 165 0-filter assembly; 1660-second preheating assembly; 1670-second fresh air inlet; 1680-second exhaust unit; 1700-cooling traction device; 1710-cooling box; 1720-cooling section; 1730-traction roller; 1740-tension adjustment mechanism; 1780-tension sensor; 1790-tension isolation mechanism; 1791-pressure roller; 1792-pressure roller drive unit; 1900-winding device; 2000-winding deviation correction device; 2100-introduction roller; 2200-exit roller; 3000-substrate; 3100-transmission section; A-first direction; B-second direction; C-third direction. DETAILED DESCRIPTION

[0047] To make the objectives, technical solutions, and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Generally, the components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0048] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for protection, but merely represents selected embodiments of the present application. All other embodiments obtained by persons of ordinary skill in the art based on the embodiments in the present application without creative work are within the scope of protection of the present application.

[0049] It should be noted that, unless there is any conflict, the embodiments and features in the embodiments of this application can be combined with each other.

[0050] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0051] In the description of the embodiments of the present application, it should be noted that the indicated orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the product of the application is conventionally placed when in use, or are the orientations or positional relationships conventionally understood by those skilled in the art. These are merely for the convenience of describing the present application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the present application. In addition, the terms "first," "second," "third," etc. are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0052] The term "plurality" used in this application refers to two or more (including two).

[0053] The electrode sheet mentioned in the embodiment of the present application includes a current collector and an active material layer coated on the surface of the current collector, the active material layer is coated on a partial area of the current collector, the current collector not coated with the active material layer protrudes from the current collector coated with the active material layer, and the current collector not coated with the active material layer serves as the electrode tab of the electrode sheet. The electrode sheet can be a positive electrode sheet or a negative electrode sheet. If the electrode sheet is a positive electrode sheet, the positive electrode sheet includes a positive electrode current collector and a positive electrode active material layer, the positive electrode active material layer is coated on the surface of the positive electrode current collector, the positive electrode current collector not coated with the positive electrode active material layer protrudes from the positive electrode current collector coated with the positive electrode active material layer, and the positive electrode current collector not coated with the positive electrode active material layer serves as the positive electrode tab. Taking lithium-ion batteries as an example, the material of the positive electrode current collector can be aluminum, and the positive electrode active material can be lithium cobalt oxide, lithium iron phosphate, ternary lithium or lithium manganese oxide, etc. If the electrode sheet is a negative electrode sheet, the negative electrode sheet includes a negative electrode current collector and a negative electrode active material layer. The negative electrode active material layer is coated on the surface of the negative electrode current collector. The negative electrode current collector not coated with the negative electrode active material layer protrudes from the negative electrode current collector coated with the negative electrode active material layer. The negative electrode current collector not coated with the negative electrode active material layer serves as the negative electrode tab. The negative electrode current collector can be made of copper, and the negative electrode active material can be carbon, silicon, or the like.

[0054] In the manufacture of pole pieces, many factors need to be considered to ensure the molding quality of the pole pieces, such as coating weight, coating density, coating thickness, tape running accuracy and other factors. In addition, the drying quality of the active material layer of the pole piece also needs to be considered.

[0055] The main factors affecting the drying quality of the electrode's active material layer include heating uniformity, insufficient heating, and overheating. Uneven heating of the electrode leads to uneven dehydration, resulting in uneven electrode thickness. When the electrode assembly expands due to heat, the uneven force applied can cause lithium deposition, affecting the battery's electrical performance and safety. Insufficient heating of the electrode leads to excessive moisture content in the active material layer, affecting conductivity. Overheating can easily cause the active material layer to crack and fall off.

[0056] The drying quality of the electrode has an important impact. The inventors found that in the prior art, Figure 1 As shown, the dryer 1 has multiple air inlets 1a arranged side by side. Each air inlet 1a faces the active material layer of the electrode 1c and supplies air to the electrode 1c. When the air from the air inlet 1a acts on the electrode 1c, it will spread to the surroundings with the vertical action point of the wind and the electrode 1c as the center. Figure 1The direction of the solid arrow in the middle is the flow direction view after the wind from the air inlet nozzle 1a acts on the pole piece 1c. After the wind from the air inlet nozzle 1a acts on the pole piece 1c, a convergence area 1b will be formed between the two adjacent air inlets 1a. The wind carries heat flow, and the heat in the convergence area 1b between the two adjacent air inlets 1a is higher than the heat at other positions, so that the active material layer corresponding to the convergence area 1b is heated to a greater extent than other positions, resulting in uneven heating of the active material layer of the pole piece 1c, and even causing the active material layer corresponding to the convergence area 1b to be overheated.

[0057] Based on this, an embodiment of the present application provides a technical solution, by setting at least one return air section between two adjacent first air inlets, the fluid medium in the drying chamber can be discharged through the return air section, and the fluid medium is discharged through the return air section, thereby taking away the heat between the two adjacent first air inlets, avoiding heat accumulation between the two first air inlets, and improving the heating uniformity of the items to be dried.

[0058] The technical solution described in the embodiment of the present application is applicable to the coating device 1000 and other products that require the use of drying technology or heating technology.

[0059] like Figure 2 As shown, some embodiments of the present application provide a coating apparatus 1000 including a coating device 100 and a drying device 200. The coating device 100 is used to coat the surface of a substrate 3000 to form a coating on the surface of the substrate 3000. The drying device 200 is used to dry the coating applied to the substrate 3000.

[0060] The embodiment of the present application introduces the relevant structure by taking the coating device 1000 for coating to form an electrode as an example. Therefore, the substrate 3000 can be a current collector, and the coating formed by the coating device 100 on the surface of the substrate 3000 can be an active material layer. Depending on the polarity of the electrode, the material of the current collector and the material of the active material layer are different. If the coating device 1000 forms a positive electrode, the material of the current collector can be aluminum, and the active material can be lithium cobalt oxide, lithium iron phosphate, ternary lithium or lithium manganese oxide, etc. If the coating device 1000 forms a negative electrode, the material of the current collector can be copper, and the active material can be carbon or silicon, etc.

[0061] The substrate 3000 has a first surface and a second surface opposite to each other along a thickness direction of the substrate 3000 . The coating device 100 is used to coat the first surface and the second surface to form coatings on the first surface and the second surface.

[0062] In some embodiments, the coating apparatus 100 includes a first coating mechanism 110 and a second coating mechanism 120, wherein the second coating mechanism 120 is disposed downstream of the first coating mechanism 110. The first coating mechanism 110 is configured to coat the first side of the substrate 3000, and the second coating mechanism 120 is configured to coat the second side of the substrate 3000. The coating apparatus 100 includes two first coating mechanisms 110 and second coating mechanisms 120, each coating the first side and the second side, respectively, which can improve coating efficiency and thereby improve production efficiency.

[0063] Coating apparatus 1000 includes two drying devices 200. One of the two drying devices 200 is located downstream of first coating mechanism 110 and upstream of second coating mechanism 120 to dry the coating on the first side. The other of the two drying devices 200 is located downstream of second coating mechanism 120 to dry the coating on the second side. One of the two drying devices 200 is used to dry the coating on the first side of substrate 3000, while the other is used to dry the coating on the second side of substrate 3000, thereby improving the uniformity of heating of substrate 3000.

[0064] It should be noted that the "upstream" and "downstream" mentioned above and below in the embodiments of the present application refer to the order of production. Upstream means the production order comes first, and downstream means the production order comes later, and does not limit the spatial position between the components.

[0065] Please continue to see Figure 2 In some embodiments, the coating device 1000 further includes an unwinding device 400 , which is disposed upstream of the first coating mechanism 110 . The unwinding device 400 is used for automatically unwinding and conveying the substrate 3000 .

[0066] In some embodiments, the coating apparatus 1000 further includes a first roller assembly 500, which is disposed downstream of the unwinding device 400 and upstream of the first coating mechanism 110. The first roller assembly 500 includes a plurality of rotatable first rollers 510, around which the substrate 3000 is sequentially wound. The first roller assembly 500 is used to support the substrate 3000 and to transmit the substrate 3000.

[0067] Due to manufacturing errors and installation errors of the equipment, the position of the substrate 3000 may be offset along the running direction of the substrate 3000, causing the relative position of the substrate 3000 and the coating device 100 to be offset, resulting in insufficient coating accuracy of the coating device 100 on the substrate 3000.

[0068] In some embodiments, the coating equipment 1000 also includes a rewinding correction device 600, which is arranged downstream of the rewinding device 400 and upstream of the first coating mechanism 110. The rewinding correction device 600 can receive the substrate 3000 and adjust the position of the substrate 3000 so that the substrate 3000 can always be located within the coating range of the first coating mechanism 110, thereby ensuring the coating accuracy of the first coating mechanism 110 on the first side of the substrate 3000.

[0069] Due to manufacturing errors and installation errors of the equipment, the position of the substrate 3000 may shift and wrinkles may appear on the substrate 3000 during the drying process of the first and second sides of the substrate 3000, resulting in a relative position and direction shift between the substrate 3000 and other devices.

[0070] Based on this, in some embodiments, the coating apparatus 1000 further includes a first outlet correcting device 700, which is disposed downstream of the drying device 200 downstream of the first coating mechanism 110 and upstream of the second coating mechanism 120. The first outlet correcting device 700 can receive a substrate 3000 whose coating on the first side has been dried and adjust the position of the substrate 3000 so that the substrate 3000 is always within the coating range of the second coating mechanism 120, thereby ensuring the coating accuracy of the second coating mechanism 120 on the second side of the substrate 3000. The first outlet correcting device 700 can also flatten and remove wrinkles on the substrate 3000 coated on the first side to maintain the flatness of the coated substrate 3000.

[0071] In some embodiments, the coating apparatus 1000 further includes a second outlet correcting device 800, which is disposed downstream of the second coating mechanism 120 and downstream of the drying device 200. The second outlet correcting device 800 is capable of receiving the substrate 3000 after the coating on the second side has been dried and adjusting the position of the substrate 3000. The second outlet correcting device 800 can also flatten and remove wrinkles from the substrate 3000 coated on both the first and second sides to maintain the flatness of the coated substrate 3000.

[0072] There are many steps involved in forming the pole piece, and the transmission path of the substrate 3000 is long. On the transmission path of the substrate 3000 , there is a possibility that the tension of the substrate 3000 is uneven.

[0073] In some embodiments, the coating equipment 1000 also includes a first traction device 900, which is arranged downstream of the first outlet correcting device 700 and upstream of the second coating mechanism 120. The first traction device 900 is used to pull the substrate 3000 from the first outlet correcting device 700 to the second coating mechanism 120. The first traction device 900 is also used to form a tension barrier between the first outlet correcting device 700 and the second coating mechanism 120 to ensure that the tension of the substrate 3000 is balanced during the transmission process.

[0074] In some embodiments, the coating equipment 1000 also includes a second traction device 1100, which is arranged downstream of the second outlet correcting device 800. The second traction device 1100 is used to pull the substrate 3000 from the second outlet correcting device 800 to the next workstation. The second traction device 1100 is also used to form a tension barrier between the second outlet correcting device 800 and the next workstation to ensure that the tension of the substrate 3000 is balanced during the transmission process.

[0075] To ensure the coating quality, in some embodiments, the coating equipment 1000 also includes a first surface density measuring device 1200, which is arranged downstream of the first coating mechanism 110 and upstream of the second coating mechanism 120. The first surface density measuring device 1200 is used to realize real-time monitoring of the surface density of the coating on the first surface, and can be communicated with the first coating mechanism 110 to realize closed-loop control of the coating weight.

[0076] The first areal density measuring device 1200 can be disposed downstream of the first coating mechanism 110 and upstream of the drying device 200 for drying the coating on the first side, so that the first areal density measuring device 1200 is used to measure the areal density of the coating on the first side before drying. The first areal density measuring device 1200 can also be disposed downstream of the drying device 200 for drying the coating on the first side and upstream of the second coating mechanism 120, so that the first areal density measuring device 1200 is used to measure the areal density of the coating on the first side after drying.

[0077] In some embodiments, the coating equipment 1000 also includes a second surface density measuring device 1300, which is arranged downstream of the second coating mechanism 120. The second surface density measuring device 1300 is used to realize real-time monitoring of the surface density of the coating on the second surface, and can be communicated with the second coating mechanism 120 to realize closed-loop control of the coating weight.

[0078] The second areal density measuring device 1300 can be disposed downstream of the second coating mechanism 120 and upstream of the drying device 200 for drying the coating on the second side, so that the second areal density measuring device 1300 is used to measure the areal density of the coating on the second side before drying. The second areal density measuring device 1300 can also be disposed downstream of the drying device 200 for drying the coating on the second side, so that the second areal density measuring device 1300 is used to measure the areal density of the coating on the second side after drying.

[0079] In some embodiments, the coating equipment 1000 also includes a head correction device 1400, which is arranged downstream of the first surface density measuring device 1200 and upstream of the second coating mechanism 120. The head correction device 1400 is used to adjust the position of the substrate 3000 before the second coating mechanism 120 coats the second side of the substrate 3000. At the same time, it can be combined with a CCD (Charge-coupled Device) measurement system to realize closed-loop control of the position adjustment of the substrate 3000.

[0080] Since the electrode forming process is more complicated and the substrate 3000 is longer, the coating equipment 1000 occupies a larger area. In order to avoid the various devices of the coating equipment 1000 being arranged in a certain direction, in some embodiments, the coating equipment 1000 is arranged in two parallel rows. Figure 2 As shown, the devices upstream of the second coating mechanism 120 are arranged in the lower row, and the devices downstream of the second coating mechanism 120 are arranged in the upper row. To ensure that the substrate 3000 can be smoothly transferred from the lower row to the upper row, the coating apparatus 1000 further includes a climbing device 1500. The climbing device 1500 is arranged downstream of the second coating mechanism 120 and upstream of the drying device 200 for drying the coating on the second side of the substrate 3000. The climbing device 1500 is used to support the substrate 3000 and pull the substrate 3000 from the second coating mechanism 120 to the drying device 200 for drying the coating on the second side, so that the substrate 3000 can be smoothly transferred from the second coating mechanism 120 to the drying device 200 for drying the coating on the second side.

[0081] Since the coating on the first side and the coating on the second side of the substrate 3000 are dried separately by their respective corresponding drying devices 200, and the coating on the first side is dried first and then the coating on the second side, when the coating on the second side is dried, the coating on the first side will be dried again, that is, the coating on the first side is dried twice, resulting in different drying degrees for the coating on the first side and the coating on the second side, causing uneven drying. Based on this, in some embodiments, the coating apparatus 1000 further includes a heating device 1600, which is located downstream of the drying device 200 located downstream of the second coating mechanism 120, and the heating device 1600 is configured to dry the coating on the second side. The heating device 1600 can perform a secondary drying on the coating on the second side so that the drying degrees of the coating on the first side and the coating on the second side are close to each other, thereby reducing the drying difference between the coating on the first side and the coating on the second side.

[0082] In some embodiments, the heating device 1600 is disposed downstream of the second traction device 1100 , and the second traction device 1100 is used to pull the substrate 3000 from the second outlet correcting device 800 to the heating device 1600 so that the heating device 1600 performs secondary drying on the coating on the second side.

[0083] In some embodiments, the coating apparatus 1000 further includes a cooling traction device 1700 , which is disposed downstream of the heating device 1600 , and performs traction and cooling on the substrate 3000 dried by the heating device 1600 , to ensure that the coated substrate 3000 is not wrinkled during transportation.

[0084] In some embodiments, when the second areal density measuring device 1300 is disposed upstream of the heating device 1600, the coating apparatus 1000 further comprises a third areal density measuring device (not shown in the figure), which is disposed downstream of the heating device 1600. The third areal density measuring device is used to monitor the areal density of the coating on the second side after secondary drying in real time, and can be connected to the second coating mechanism 120 for communication to achieve closed-loop control of the coating weight. The case where the second areal density measuring device 1300 is disposed upstream of the heating device 1600 includes: the second areal density measuring device 1300 is disposed downstream of the drying device 200 for drying the coating on the second side of the substrate 3000 and is located upstream of the heating device 1600, or the second areal density measuring device 1300 is disposed upstream of the drying device 200 for drying the coating on the second side of the substrate 3000 and is located downstream of the second coating mechanism 120.

[0085] See Figure 2In some embodiments, the coating equipment 1000 may not be equipped with a third surface density measuring device, and the second surface density measuring device 1300 may be arranged downstream of the heating device 1600. The second surface density measuring device 1300 is used to realize real-time monitoring of the surface density of the coating on the second side after the secondary drying, and can be communicated with the second coating mechanism 120 to realize closed-loop control of the coating weight.

[0086] In some embodiments, the coating apparatus 1000 further includes a winding device 1900 , which is disposed downstream of the second areal density measuring device 1300 . The winding device 1900 is used for automatically winding and automatically changing the roll of the substrate 3000 coated on both the first and second sides.

[0087] In some embodiments, the coating device 1000 further includes a winding correction device 2000 , which is disposed downstream of the second surface density measuring device 1300 . The winding correction device 2000 is used to adjust the position of the substrate 3000 before the winding device 1900 winds up the substrate 3000 .

[0088] like Figure 3 、 Figure 4 As shown, in some embodiments, a drying device 200 includes a drying chamber 20 and a heating assembly 21. The drying chamber 20 is used to accommodate items to be dried. The drying chamber 20 has a first drying side 201 facing the items to be dried. The first drying side 201 is provided with a plurality of first air inlets 22 for allowing a fluid medium to enter the drying chamber 20. The heating assembly 21 is disposed on the first drying side 201 and is configured to dry the items to be dried. The first drying side 201 is further provided with a return air portion 23, with at least one return air portion 23 being provided between two adjacent first air inlets 22. The return air portion 23 is configured to allow the fluid medium in the drying chamber 20 to be discharged from the drying chamber 20.

[0089] In the embodiment of the present application, the fluid medium is gas, such as external air, protective gas, etc.

[0090] At least one air return portion 23 is provided between two adjacent first air inlet portions 22. Figure 2 1 shows that one return air portion 23 is provided between two adjacent first air inlet portions 22. In other embodiments, two or more return air portions 23 may be provided between two adjacent first air inlet portions 22.

[0091] The return air section 23 can discharge the fluid medium in the drying chamber 20 out of the drying chamber 20. When the fluid medium is provided to the drying chamber 20 from the two adjacent first air inlets 22, the fluid medium acts on the items to be dried and is guided between the two first air inlets 22 by the items to be dried, so that the heat carried by the fluid medium is gathered between the two first air inlets 22, causing the corresponding parts between the two adjacent first air inlets 22 to be overheated, resulting in uneven heating of the items to be dried. The return air section 23 is arranged between the two first air inlets 22 and can discharge the fluid medium between the two first air inlets 22 and take away the heat, thereby avoiding heat gathering between the two first air inlets 22 and improving the heating uniformity of the items to be dried.

[0092] The first air inlet 22 may be an air nozzle, an air supply port, etc., and the air return portion 23 may be an air nozzle, an air exhaust port, etc. When the first air inlet 22 is an air nozzle, the first air inlet 22 may extend into the drying chamber 20 to reduce the distance from the substrate 3000 .

[0093] like Figure 3 、 Figure 4 As shown, the first drying side 201 of the drying chamber 20 is located on one side in the thickness direction of the substrate 3000 , and a plurality of first air inlet portions 22 are arranged at intervals on the first air inlet side.

[0094] In order to further reduce the heat accumulation between the two adjacent first air inlets 22, in some embodiments, the return air portion 23 is arranged in the middle position of the two adjacent first air inlets 22. In other words, the distance between one of the two first air inlets 22 and the return air portion 23 is equal to the distance between the other of the two first air inlets 22 and the return air portion 23, which is beneficial to improving the uniformity of heat distribution in the drying chamber 20.

[0095] To ensure that heat is distributed as evenly as possible within the drying chamber 20, at least one heating assembly 21 is disposed between two adjacent first air inlets 22. This allows the first air inlets 22 to deliver fluid into the drying chamber 20, allowing the heat from the heating assembly 21 to be carried to various locations within the drying chamber 20 as the fluid flows, thereby improving heat distribution uniformity and, consequently, heating uniformity of the items to be dried.

[0096] In some embodiments, the drying device 200 includes a first wall 241 facing the items to be dried in a first direction A. The first air inlet 22, the heating assembly 21, and the air return 23 are all disposed on the first wall 241. The first air inlet 22, the heating assembly 21, and the air return 23 are all disposed on the side of the first wall 241 facing the drying chamber 20. The drying device 200 also includes a first drive unit 25 configured to adjust the distance between the first wall 241 and the items to be dried in the first direction A. The first drive unit 25 is capable of driving the first wall 241, which is provided with the first air inlet 22, the heating assembly 21, and the air return 23, to move, thereby adjusting the distance between the first wall 241 and the items to be dried in the first direction A, thereby adjusting the distance between the heating assembly 21 and the items to be dried, to meet different heating requirements and improve heating quality.

[0097] It should be noted that in the embodiment of the present application, the structure related to the coating equipment 1000 is introduced by taking the coating on the surface of the drying substrate 3000 as an example. Therefore, the substrate 3000 with a coating on the surface of the object to be dried can also be of other structures in other embodiments.

[0098] The first drive unit 25 can be a linear drive mechanism such as an adjustment screw, a linear motor, or a cylinder. The first drive unit 25 drives the first wall 241 to reciprocate along the first direction A, causing the first wall 241 to move closer to or further away from the substrate 3000, thereby moving the first air inlet 22, the heating assembly 21, and the air return portion 23 closer to or further away from the substrate 3000. Multiple first drive units 25 can be provided at intervals to adjust the distance between the first wall 241 and the substrate 3000 from multiple positions along the first direction A. In particular, when the first wall 241 is relatively large in length and / or width, multiple first drive units 25 can be used to drive the first wall 241 along the first direction A, ensuring that the distance between the first wall 241 and the substrate 3000 in the first direction A is the same at each position along the length and / or width of the first wall 241. This reduces the difference in distance between each position of the substrate 3000 and the first air inlet 22, the heating assembly 21, and the air return portion 23 in the first direction A, thereby improving heating uniformity and thus enhancing product quality.

[0099] In some embodiments, the drying device 200 further includes a first air inlet chamber 242, which is separated from the drying chamber 20 by a first wall 241. The first air inlet portion 22, the heating assembly 21, and the return air portion 23 are all disposed on the first wall 241. The first air inlet portion 22 is used to allow the fluid medium within the first air inlet chamber 242 to enter the drying chamber 20. After entering the first air inlet chamber 242, the fluid medium enters the drying chamber 20 through the multiple first air inlets 22, ensuring a relatively even distribution of the fluid medium within the drying chamber 20, thereby improving the uniformity of heating of the items being dried. The first air inlet chamber 242 and the drying chamber 20 share the first wall 241 and are separated by the first wall 241, thereby reducing the size of the drying device 200.

[0100] The drying device 200 further includes an outer box 26 , and the drying chamber 20 and the first air inlet chamber 242 are both disposed in the outer box 26 .

[0101] In some embodiments, the drying device 200 includes a first air box 24, the interior of which forms a first air inlet chamber 242. The first air box 24 includes a first wall 241 and a first body 243 having a first opening. The first wall 241 covers the first opening, so that the first wall 241 and the first body 243 collectively define the first air inlet chamber 242. The first air inlet chamber 242 communicates with the interior of the outer box 26 via the first air inlet portion 22. A first drive unit 25 is mounted on the outer box 26. The first drive unit 25 drives the first air box 24 to move in a first direction A within the outer box 26, thereby causing the first wall 241 to move in the first direction A.

[0102] The first air box 24 is also provided with a first air supply port 244 , which is connected to the first air inlet chamber 242 , and the fluid medium is provided to the first air inlet chamber 242 through the first air supply port 244 . The fluid medium entering the first air inlet chamber 242 then enters the drying chamber 20 through the first air inlet portion 22 .

[0103] The first air inlet chamber 242 and the drying chamber 20 may also be formed in other forms. For example, the first air inlet chamber 242 may be defined by the surface of the first wall 241 facing away from the items to be dried and the inner wall of the outer box 26. The ends of the first wall 241 are slidably disposed on the outer box 26. The first driving unit 25 is mounted on the outer box 26, and the first driving unit 25 drives the first wall 241 to slide relative to the outer box 26 along the first direction A. The surface of the first wall 241 facing the substrate 3000 and the inner wall of the outer box 26 together define the drying chamber 20. The first driving unit 25 drives the first wall 241 to move along the first direction A, thereby adjusting not only the distance between the first wall 241 and the substrate 3000, but also the size of the first air inlet chamber 242 and the drying chamber 20. When the first air inlet chamber 242 gradually decreases, the drying chamber 20 gradually increases. Conversely, when the first air inlet chamber 242 gradually increases, the drying chamber 20 gradually decreases.

[0104] In some embodiments, the drying chamber 20 further includes a second drying side 202 arranged opposite the first drying side 201 in the first direction A. The second drying side 202 is provided with a plurality of second air inlets 27 for allowing a fluid medium to enter the drying chamber 20. The second air inlets 27 enable the fluid medium to enter the drying chamber 20 from the second drying side 202 of the drying chamber 20, thereby accelerating the flow of the fluid medium within the drying chamber 20 and thereby accelerating the flow of heat within the drying chamber 20, thereby evenly distributing the heat within the drying chamber 20 and improving the uniformity of heating of the items to be dried.

[0105] The second drying side 202 is located on the side of the substrate 3000 facing away from the first drying side 201. The second air inlet 27 can be an air nozzle, an air supply port, etc. When the second air inlet 27 is an air nozzle, the second air inlet 27 can extend into the drying chamber 20 to reduce the distance between the second air inlet 27 and the substrate 3000.

[0106] In some embodiments, the drying device 200 includes a first wall 241 facing the items to be dried in a first direction A, and a second wall 281 disposed opposite the first wall 241. The first air inlet 22, the heating assembly 21, and the air return 23 are all disposed on the first wall 241, and the second air inlet 27 is disposed on the second wall 281. The drying chamber 20 is located between the first wall 241 and the second wall 281 in the first direction A. The drying device 200 also includes a second driving unit 29 configured to drive the second wall 281 to move so as to adjust the distance between the second wall 281 and the first wall 241 in the first direction A. The second driving unit 29 can drive the second wall 281 to move so as to adjust the distance between the second wall 281 and the first wall 241 in the first direction A to accommodate items to be dried of varying sizes along the first direction A.

[0107] The second drive unit 29 can be a linear drive mechanism such as an adjustment screw, a linear motor, or a cylinder. The second drive unit 29 drives the second wall 281 to reciprocate along the first direction A, moving the second wall 281 closer to or farther from the substrate 3000 or the first wall 241, thereby adjusting the distance between the second air inlet 27 and the substrate 3000 or the distance between the second wall 281 and the first wall 241. Multiple second drive units 29 can be provided at intervals to enable adjustment of the second wall 281 along the first direction A from multiple positions. In particular, when the second wall 281 is relatively large in length and / or width, multiple second drive units 29 can be used to drive the second wall 281 along the first direction A, ensuring that the distance between the second wall 281 and the substrate 3000 in the first direction A is consistent at each position along the length and / or width of the second wall 281. This reduces the distance differences between each position on the substrate 3000 and the second air inlet 27 in the first direction A, improves heating uniformity, and thus enhances product quality.

[0108] In some embodiments, the drying device 200 includes a second air box 28, the interior of which forms a second air inlet chamber 282. The second air box 28 includes a second wall 281 and a second housing 283 having a second opening. The second wall 281 covers the second opening, so that the second wall 281 and the second housing 283 collectively define the second air inlet chamber 282. The second air inlet chamber 282 communicates with the interior of the outer housing 26 via a second air inlet portion 27. A second drive unit 29 is mounted on the outer housing 26. The second drive unit 29 drives the second air box 28 to move in a first direction A within the outer housing 26, thereby causing the second wall 281 to move in the first direction A.

[0109] The second air box 28 is further provided with a second air supply port 284 , which is connected to the second air inlet chamber 282 . The fluid medium is supplied to the second air inlet chamber 282 through the second air supply port 284 . The fluid medium entering the second air inlet chamber 282 then passes through the second air inlet portion 27 and enters the drying chamber 20 .

[0110] The second air inlet chamber 282 may also be formed in other forms. For example, the second air inlet chamber 282 may be defined by the surface of the second wall 281 facing away from the article to be dried and the inner wall of the outer box 26. Both ends of the second wall 281 are slidably disposed on the outer box 26 along the first direction A. The second driving unit 29 is installed on the outer box 26, and the second driving unit 29 drives the second wall 281 to slide relative to the outer box 26 along the first direction A. The first driving unit 25 drives the second wall 281 to move along the first direction A, which can not only adjust the distance between the second wall 281 and the substrate 3000, but also adjust the size of the second air inlet chamber 282 and the drying chamber 20. When the second air inlet chamber 282 gradually decreases, the drying chamber 20 gradually increases. Conversely, when the second air inlet chamber 282 gradually increases, the drying chamber 20 gradually decreases.

[0111] The outer box 26 is also provided with a first inlet 262 for the substrate 3000 to pass through the outer box 26 and a first outlet 263 for the substrate 3000 to pass through the outer box 26. The first inlet 262 and the first outlet 263 are both connected to the interior of the outer box 26. During the process of the substrate 3000 passing through the outer box 26 from the first inlet 262 and passing through the outer box 26 from the first outlet 263, the heating component 21 dries the coating on the substrate 3000.

[0112] In some embodiments, the drying device 200 may only include the first air inlet chamber 242 and the drying chamber 20 .

[0113] Since the fluid medium needs to be preheated before entering the drying chamber 20, it is avoided that the temperature difference between the fluid medium entering the drying chamber 20 from the first air inlet 22 and the second air inlet 27 and the fluid medium inside the drying chamber 20 is too large, which will have a significant impact on the drying temperature in the drying chamber 20.

[0114] In some embodiments, the drying device 200 further includes a return air chamber 30 and a circulation unit 31 . The return air chamber 30 is configured to accommodate the fluid medium discharged from the return air portion 23 . The circulation unit 31 is configured to introduce the fluid medium in the return air chamber 30 into the first air inlet chamber 242 .

[0115] The fluid medium discharged from the return air part 23 can be accommodated in the return air chamber 30, and then enters the first air inlet chamber 242 under the action of the circulation unit 31, so that it can enter the drying chamber 20 through the first air inlet part 22, and can recycle the heat generated by the heating component 21 in the drying chamber 20 to reduce energy consumption. Figure 4 The solid arrows in the middle indicate the flow path of the fluid medium entering the drying chamber 20 from the first air inlet 22, acting on the substrate 3000, passing through the return air section 23, and finally passing through the return air chamber 30 and being discharged from the first exhaust port 264 on the outer box 26. The hollow arrows indicate the path of the fluid medium in the outer box 26 being directly discharged through the first exhaust port 264.

[0116] In some embodiments, the outer box 26 is further provided with a first exhaust port 264 connected to the interior of the outer box 26. The drying device 200 further includes a first exhaust unit 32. The first exhaust unit 32 is used to discharge the fluid medium in the outer box 26 from the first exhaust port 264. In the process of the first exhaust unit 32 discharging the fluid medium in the outer box 26, the fluid medium will carry the evaporated solvent of the coating of the substrate 3000 to reduce the weight loss rate.

[0117] In some embodiments, the return air chamber 30 is defined by the outer wall of the first housing 243, the outer wall of the second housing 283, and the inner wall of the outer box 26. The return air chamber 30 is connected to the drying chamber 20. The fluid medium in the drying chamber 20 can enter the return air chamber 30 directly or through the return air section 23. The fluid medium entering the return air chamber 30 is driven by the circulation unit 31 to enter the first air inlet chamber 242 and / or the second air inlet chamber 282. In some embodiments, the circulation unit 31 can discharge the fluid medium in the return air chamber 30 through the first exhaust port 264 and then introduce it into the drying chamber 20 through the first air inlet section 22.

[0118] like Figure 5As shown, in some embodiments, the drying device 200 further includes a first fresh air inlet 33. The circulation unit 31 draws fresh air from the outside through the first fresh air inlet 33 and delivers the fresh air into the first air inlet chamber 242 and the second air inlet chamber 282 through the first air supply port 244 and the second air supply port 284. In some embodiments, the drying device 200 further includes a first preheating assembly 35. Before the fresh air is delivered by the circulation unit 31 into the first air inlet chamber 242 and the second air inlet chamber 282, it passes through the first preheating assembly 35. The first preheating assembly 35 preheats the fresh air to prevent a large temperature difference between the fresh air and the fluid medium in the drying chamber 20, which would significantly affect the drying temperature in the drying chamber 20.

[0119] like Figure 6 As shown, in some embodiments, the drying device 200 also includes a filtering mechanism 36, which is used to filter the fluid medium before the fluid medium enters the first air inlet chamber 242 and the second air inlet chamber 282, that is, the fluid medium enters the first air inlet chamber 242 and the second air inlet chamber 282 after passing through the filtering mechanism 36 to ensure the cleanliness of the fluid medium entering the first air inlet chamber 242 and the second air inlet chamber 282.

[0120] like Figure 7 、 Figure 8 As shown, in some embodiments, the heating assembly 21 includes a mounting frame 211 and a heating unit 213. The mounting frame 211 is disposed on the first drying side 201 so that the heat generated by the heating unit 213 has a shorter path to reach the substrate 3000, thereby reducing heat loss.

[0121] The heating unit 213 can be a heating resistor, an infrared lamp, etc. Taking the infrared lamp as an example, the mounting frame 211 is provided with a fixing groove 212 , the notch of the fixing groove 212 faces the substrate 3000 , and the infrared lamp is clamped in the fixing groove 212 .

[0122] In some embodiments, the heating assembly 21 further includes a protective member 214, which is disposed on the mounting frame 211 and surrounds the outer periphery of the heating unit 213. The provision of the protective member 214 can separate the heating unit 213 from the workpiece to be dried, thereby preventing the workpiece to be dried from direct contact with the heating unit 213 and damaging the workpiece to be dried, thereby playing a role in safety protection. The protective member 214 can be connected to the mounting frame 211 using a quick-release structure, which can be quickly disassembled for easy installation or replacement. Of course, the protective member 214 can also be mounted on the mounting frame 211 by means of bolts, screws, welding, etc. The protective member 214 can be made of a stainless steel mesh, which has a strong heat resistance and does not affect the heat transfer of the heating unit 213.

[0123] In some embodiments, the drying device 200 includes a blowing portion 37 , which is configured to provide a fluid medium to the heating component 21 to adjust the temperature of the heating component 21 .

[0124] The blowing portion 37 can provide a fluid medium to the heating component 21 to adjust the temperature of the heating component 21 . For example, the blowing portion 37 can supply cold air to the heating component 21 to cool the heating component 21 , thereby increasing the life of the heating component 21 .

[0125] The blowing section 37 is arranged on the mounting frame 211 so that the blowing section 37 is arranged close to the heating unit 213. The fluid medium entering from the blowing section 37 can act on the heating unit 213 directly or after a short distance, thereby reducing the impact of the fluid medium provided by the blowing section 37 on the temperature in the drying chamber 20.

[0126] like Figure 8 As shown, the blowing portion 37 includes a slit-type air nozzle that allows air to pass through to the heating assembly 21, thereby cooling the heating assembly 21. The fluid medium entering the blowing portion 37 and passing through the heating unit 213 can be heated by the heating unit 213, thereby reducing the temperature of the heating unit 213 and accelerating air flow and heat diffusion within the drying chamber 20. The air outlet of the blowing portion 37 faces the heating unit 213, so that the fluid medium blown out of the blowing portion 37 can directly act on the heating unit 213 and be heated, reducing the possibility that the fluid medium blown out of the blowing portion 37 will diffuse within the drying chamber 20 without being heated.

[0127] like Figure 9 As shown, in some embodiments, the heating device 1600 includes a heating box 1610, a drying component 1620 and a plurality of drive rollers 1630, and the drying component 1620 and the plurality of drive rollers 1630 are all arranged in the heating box 1610; the plurality of drive rollers 1630 are used to convey the substrate 3000, and the substrate 3000 forms a conveying section 3100 between two adjacent drive rollers 1630; the drying component 1620 is arranged between two adjacent and opposite conveying sections 3100 and is arranged facing the second side of the substrate 3000, so that the drying component 1620 dries the coating on the second side of the substrate 3000.

[0128] A plurality of transmission rollers 1630 are provided in the heating box 1610 to increase the transmission distance of the substrate 3000 in the heating box 1610 and extend the transmission time of the substrate 3000 in the heating box 1610, thereby extending the drying time.

[0129] In some embodiments, a portion of the plurality of transmission rollers 1630 is first transmission rollers 1631, and another portion of the plurality of transmission rollers 1630 is second transmission rollers 1632. There are multiple first transmission rollers 1631 and multiple second transmission rollers 1632. The multiple first transmission rollers 1631 and the multiple second transmission rollers 1632 are arranged in intervals along the second direction B. The multiple first transmission rollers 1631 are arranged in a row along the third direction C, and the multiple second transmission rollers 1632 are arranged in a row along the second direction B, with the second direction B being perpendicular to the third direction C. The substrate 3000 is sequentially wound around the first transmission rollers 1631 and the second transmission rollers 1632 along its transmission direction, forming a transmission section 3100 between two adjacent first transmission rollers 1631 and second transmission rollers 1632. In this way, along the third direction, the substrate 3000 is divided into a plurality of spaced apart conveying sections 3100, and at least one drying component 1620 is provided between two adjacent conveying sections 3100. The drying component 1620 can heat the coating on the second surfaces of the two adjacent conveying sections 3100 at the same time, thereby improving the heating efficiency.

[0130] The heating device 1600 includes a plurality of drying components 1620 , which are arranged in the heating box 1610 at intervals along the conveying direction of the substrate 3000 , thereby improving drying quality and drying efficiency.

[0131] In some embodiments, the heating power of heating device 1600 can be lower than the heating power of either drying device 200 to minimize the impact of the heat from heating device 1600 on the coating on the first side during secondary drying of the coating on the second side. The heating power of the two drying devices 200 can be the same or different, and a drying device 200 with corresponding power can be selected based on the thickness of the coating on the first and second sides, the degree of drying required, and other factors.

[0132] The heating box 1610 is also provided with an air supply portion 1611 for the fluid medium to enter the heating box 1610 and an exhaust portion 1612 for the fluid medium in the heating box 1610 to be discharged; the heating device 1600 also includes a circulation component 1640, which is configured to introduce the fluid medium discharged from the exhaust portion 1612 into the heating box 1610 from the air supply portion 1611, so as to fully utilize the heat generated by the drying component 1620 and reduce energy consumption.

[0133] In some embodiments, the heating chamber 1610 further comprises a second inlet 1613 for the substrate 3000 to enter the heating chamber 1610 and a second outlet 1614 for the substrate 3000 to exit the heating chamber 1610. While the substrate 3000 enters the heating chamber 1610 through the second inlet 1613 and exits the heating chamber 1610 through the second outlet 1614, the drying assembly 1620 dries the coating on the second side of the substrate 3000.

[0134] The coating apparatus 1000 further includes an inlet roller 2100 and an outlet roller 2200. The inlet roller 2100 is disposed at the second entrance 1613 and is configured to introduce the substrate 3000 from the second entrance 1613 into the heating box 1610, so that the substrate 3000 is smoothly and smoothly transferred from the previous station of the heating device 1600 (such as the second traction device 1100) to the heating device 1600. The outlet roller 2200 is disposed at the second exit 1614 and is configured to guide the substrate 3000 out of the heating box 1610 from the second exit 1614, so that the substrate 3000 is smoothly transferred from the heating device 1600 to the next station (such as the cooling traction device 1700).

[0135] In some embodiments, the import roller 2100 and the export roller 2200 are both arranged on the outer wall of the heating box 1610 to allow the substrate 3000 to smoothly enter and move out of the heating box 1610, reducing the risk of the substrate 3000 being scratched and damaged when entering and moving out of the heating box 1610.

[0136] In some embodiments, only one of the import roller 2100 and the export roller 2200 is arranged in the heating box 1610, and the other can be arranged in a device corresponding to other workstations. For example, the import roller 2100 is arranged in the heating box 1610, and the export roller 2200 can be arranged in the cooling traction device 1700 downstream of the heating device 1600.

[0137] In some embodiments, heating device 1600 further includes a filter assembly 1650 disposed at the air inlet. Filter assembly 1650 is configured to filter the fluid medium entering heating box 1610 from the air inlet to ensure the cleanliness of the fluid medium entering heating box 1610, thereby ensuring heating and drying safety and quality. Filter assembly 1650 may be a filter screen or other structure.

[0138] like Figure 10 As shown, in some embodiments, the heating device 1600 further includes a second fresh air inlet 1670 , and the circulation component 1640 draws fresh air from the outside through the second fresh air inlet 1670 and introduces the fresh air into the heating box 1610 from the air supply portion 1611 .

[0139] In some embodiments, the heating device 1600 further includes a second preheating assembly 1660, which is disposed within the air supply portion 1611. The preheating assembly is configured to preheat the fluid medium entering the heating box 1610 from the air supply portion 1611, particularly the fresh air drawn from the second fresh air inlet 1670. This prevents the fluid medium from entering the heating box 1610 from the air supply portion 1611 from being too cold, thereby lowering the temperature within the heating box 1610 and affecting the heating device 1600's ability to dry the coating on the second surface of the substrate 3000. The second preheating assembly 1660 is disposed downstream of the filter assembly 1650, meaning that the fresh air is first filtered by the filter assembly 1650 and then preheated by the second preheating assembly 1660.

[0140] In some embodiments, the heating box 1610 is also provided with a second exhaust port 1615 connected to the internal space of the heating box 1610, and the heating device 1600 also includes a second exhaust unit 1680, which is used to discharge the fluid medium in the heating box 1610 from the second exhaust port 1615. In the process of the second exhaust unit 1680 discharging the fluid medium in the heating box 1610, the fluid medium will carry the solvent evaporated by drying the coating of the substrate 3000, thereby reducing the weight loss rate.

[0141] like Figure 11 As shown, in some embodiments, the cooling traction device 1700 includes a cooling box 1710, a cooling portion 1720, and a plurality of traction rollers 1730. The cooling portion 1720 and the plurality of traction rollers 1730 are both disposed within the cooling box 1710. The cooling portion 1720 is configured to provide a fluid medium to the substrate 3000 to adjust the temperature of the substrate 3000. The plurality of traction rollers 1730 are configured to allow the substrate 3000 to be wound sequentially along its moving direction to convey the substrate 3000.

[0142] In some embodiments, the cooling traction device 1700 further includes a tension adjustment mechanism 1740 , which is disposed in the cooling box 1710 and configured to adjust the tension of the substrate 3000 to balance the tension of the substrate 3000 and ensure smooth transmission of the substrate 3000 .

[0143] In some embodiments, the cooling traction device 1700 also includes a tension sensor 1780, which is disposed in the cooling box 1710. The tension sensor 1780 is used to detect the tension of the substrate 3000. The tension adjustment mechanism 1740 adjusts the tension of the substrate 3000 according to the tension signal of the substrate 3000 obtained by the tension sensor 1780, so that the tension of the substrate 3000 is balanced and stable transmission can be achieved.

[0144] In some embodiments, the cooling traction device 1700 also includes a tension isolation mechanism 1790, which is configured to cooperate with one of the multiple traction rollers 1730 to press the substrate 3000 so that along the conveying direction of the substrate 3000, the substrate 3000 located on both sides of the tension isolation mechanism 1790 can form different tensions to meet the requirements of smooth conveying. The tension isolation mechanism 1790 includes a pressure roller 1791 and a pressure roller driving unit 1792. The pressure roller driving unit 1792 drives the pressure roller 1791 to move in the cooling box 1710 to adjust the distance between the circumference of the pressure roller 1791 and the circumference of the traction roller 1730 that cooperates with the tension isolation mechanism 1790, thereby adjusting the degree of pressure of the pressure roller 1791 and the traction roller 1730 on the substrate 3000, thereby adjusting the friction between the substrate 3000 and the traction roller 1730, so that the substrate 3000 located on both sides of the tension isolation mechanism 1790 can form different tensions.

[0145] The above are merely preferred embodiments of the present application and are not intended to limit the present application. Those skilled in the art will readily appreciate that various modifications and variations are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. A coating device, characterized in that, include: a coating device configured to coat a substrate; a drying device for drying the coating applied to the substrate, the drying device comprising a drying chamber and a heating assembly, the drying chamber being used to accommodate the article to be dried, the drying chamber having a first drying side facing the article to be dried, the first drying side being provided with a plurality of first air inlets for supplying a fluid medium into the drying chamber, the heating assembly being disposed on the first drying side, and the heating assembly being configured to dry the article to be dried; The first drying side is further provided with an air return portion, and at least one air return portion is provided between two adjacent first air inlet portions. The air return portion is configured to allow the fluid medium in the drying chamber to be discharged from the drying chamber.

2. The coating device according to claim 1, characterized in that The drying device comprises a first wall facing the item to be dried in a first direction, and the first air inlet, the heating assembly and the air return are all arranged on the first wall; The drying device further includes a first driving unit configured to adjust the distance between the first wall and the items to be dried in the first direction.

3. The coating device according to claim 1 or 2, characterized in that: The drying device further comprises a first air inlet chamber, the first air inlet chamber being separated from the drying chamber by a first wall, the first air inlet portion, the heating assembly and the air return portion being all arranged on the first wall; Wherein, the first air inlet portion is used to allow the fluid medium in the first air inlet chamber to enter the drying chamber.

4. The coating device according to claim 3, characterized in that The drying device further includes a return air chamber and a circulation unit. The return air chamber is configured to accommodate the fluid medium discharged from the return air portion. The circulation unit is configured to introduce the fluid medium in the return air chamber into the first air inlet chamber.

5. The coating device according to claim 1, characterized in that The drying chamber further comprises a second drying side arranged opposite to the first drying side in a first direction, and the second drying side is provided with a plurality of second air inlets for supplying fluid medium into the drying chamber.

6. The coating device according to claim 5, characterized in that The drying device includes a first wall facing the item to be dried in the first direction and a second wall arranged opposite to the first wall; The first air inlet, the heating assembly and the air return portion are all arranged on the first wall, and the second air inlet is arranged on the second wall; The drying chamber is located between the first wall and the second wall in the first direction; The drying device further includes a second driving unit configured to drive the second wall to move so as to adjust a distance between the second wall and the first wall in the first direction.

7. The coating device according to claim 1, characterized in that At least one heating component is arranged between two adjacent first air inlets.

8. The coating device according to claim 1, characterized in that The drying device includes a blowing portion configured to provide a fluid medium to the heating component to adjust the temperature of the heating component.

9. The coating device according to claim 8, characterized in that The heating assembly includes a mounting frame and a heating unit. The mounting frame is arranged on the drying side. The heating unit and the blowing part are both arranged on the mounting frame.

10. The coating device according to claim 9, characterized in that The heating assembly further includes a protective member, which is arranged on the mounting frame and surrounds the outer periphery of the heating unit.

11. The coating device according to claim 1, characterized in that A distance between one of the two first air inlets and the air return portion is equal to a distance between the other of the two first air inlets and the air return portion.

12. The coating device according to any one of claims 1-2 and 5-11, characterized in that: The coating device includes a first coating mechanism and a second coating mechanism, wherein the second coating mechanism is disposed downstream of the first coating mechanism, the first coating mechanism is configured to coat a first surface of the substrate, and the second coating mechanism is configured to coat a second surface of the substrate opposite to the first surface; The coating equipment includes two drying devices, one of the two drying devices is arranged downstream of the first coating mechanism and upstream of the second coating mechanism to dry the coating on the first surface, and the other of the two drying devices is located downstream of the second coating mechanism to dry the coating on the second surface.

13. The coating device according to claim 12, characterized in that The coating apparatus further includes a heating device, which is disposed downstream of the drying device located downstream of the second coating mechanism, and is configured to dry the coating on the second surface.

14. The coating device according to claim 13, characterized in that The coating equipment further includes a cooling and traction device, which is disposed downstream of the heating device and is used for traction, transporting, and cooling the substrate after being dried by the heating device.

15. The coating device according to claim 14, characterized in that The cooling traction device includes a cooling box, a cooling portion and a plurality of traction rollers. The cooling portion and the plurality of traction rollers are both arranged in the cooling box. The cooling portion is configured to provide a fluid medium to the substrate to adjust the temperature of the substrate. The plurality of traction rollers are configured to allow the substrate to be wound sequentially along its moving direction to convey the substrate.

16. The coating device according to claim 15, characterized in that The cooling and pulling device further includes a tension adjustment mechanism, which is disposed in the cooling box and configured to adjust the tension of the substrate.

17. The coating device according to claim 16, characterized in that The cooling and traction device further includes a tension sensor, which is disposed in the cooling box and is used to detect the tension of the substrate. The tension adjustment mechanism adjusts the tension of the substrate according to the tension signal of the substrate obtained by the tension sensor.

18. The coating device according to claim 15, characterized in that The cooling traction device further includes a tension breaking mechanism, which is configured to cooperate with one of the traction rollers to press the substrate.

19. The coating device according to claim 18, characterized in that The tension-breaking mechanism includes a pressure roller and a pressure roller driving unit. The pressure roller driving unit drives the pressure roller to move in the cooling box to adjust the distance between the circumferential surface of the pressure roller and the circumferential surface of the traction roller cooperating with the tension-breaking mechanism, thereby adjusting the degree of pressure of the pressure roller and the traction roller on the substrate.

Images