Coating device

Abstract

The utility model relates to a coating device. The coating device comprises a coating tool bit and a coating device, the liquid storage container is used for containing a solution to be coated and is connected with the coating tool bit; the temperature control assembly comprises a heating unit and a cooling unit, the heating unit is used for heating the liquid storage container, the cooling unit is used for cooling the liquid storage container, the heating unit extends in the circumferential direction of the liquid storage container, and the cooling unit extends in the circumferential direction of the liquid storage container. According to the coating device, the temperatures of the solutions coated on the substrates of the battery samples coated in batches can keep good consistency, and the film layer consistency of the different battery samples is improved.

Description

Technical Field

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

[0002] Perovskite solar cells have attracted much attention due to their high photoelectric conversion efficiency and ease of large-scale fabrication. In common perovskite solar cell fabrication methods, a perovskite solution is coated onto a substrate using a coating device to form a perovskite liquid film, which is then dried, crystallized, and annealed to form a perovskite film layer.

[0003] To ensure that the coating apparatus can perform large-area coating and batch coating of multiple perovskite solar cell samples, the total liquid storage capacity of the coating apparatus's storage container is usually large. In related technologies, the solution temperature in the storage container of the coating apparatus is affected by the ambient temperature and fluctuates significantly. This results in large differences in the solution temperature applied to the substrates of each perovskite solar cell sample, leading to poor film consistency among the batch-coated perovskite solar cell samples. Utility Model Content

[0004] In view of the above problems, this application provides a coating apparatus in which the temperature of the solution coated on the substrate of each battery sample in batch coating can maintain good consistency, thereby improving the film consistency of different battery samples.

[0005] This application provides a coating apparatus, comprising:

[0006] Coating blade;

[0007] A liquid storage container for holding the solution to be coated and connected to the coating blade head;

[0008] A temperature control assembly includes a heating unit for heating the liquid storage container and a cooling unit for cooling the liquid storage container, wherein the heating unit extends circumferentially along the liquid storage container and the cooling unit extends circumferentially along the liquid storage container.

[0009] The aforementioned coating apparatus heats the liquid storage container via a heating unit extending circumferentially along the container's periphery, thereby raising the temperature of the solution to be coated within. It also cools the container via a cooling unit extending circumferentially along the container's periphery, facilitating temperature control of the solution. This allows the temperature control component to maintain a stable temperature for the solution within the container, ensuring good temperature consistency across the substrates of various battery samples being coated in a batch, thus improving film uniformity across different samples. Furthermore, the temperature control component can both heat and cool the solution within the container, allowing for flexible temperature adjustment to maintain a suitable coating temperature. This results in an appropriate evaporation rate for the liquid film, ensuring that the film formation time at the beginning and end of the coating area is as close as possible during large-area coating, further improving the uniformity of the film layer.

[0010] In one embodiment, the heating unit includes multiple heating sections extending circumferentially along the liquid storage container, and the cooling unit includes multiple cooling sections extending circumferentially along the liquid storage container.

[0011] Along the circumference of the liquid storage container, the heating unit includes multiple tortuous heating sections, resulting in a larger heat exchange area and thus increasing the heating rate of the liquid storage container. Similarly, the cooling unit includes multiple tortuous cooling sections, resulting in a larger heat exchange area and thus increasing the cooling rate of the liquid storage container.

[0012] In one embodiment, the cooling unit includes:

[0013] Multiple first cooling sections, each extending along the depth direction of the liquid storage container, and the multiple first cooling sections are spaced apart circumferentially along the liquid storage container; and

[0014] Multiple second cooling sections, each of which connects two adjacent first cooling sections.

[0015] With this configuration, the heat exchange area of ​​the cooling unit is large, which can quickly cool down the coating solution.

[0016] In one embodiment, the heating unit includes:

[0017] Multiple first heating sections, each extending along the depth direction of the liquid storage container, and the multiple first heating sections are spaced apart circumferentially along the liquid storage container; and

[0018] Multiple second heating sections, each of which connects two adjacent first heating sections.

[0019] With this configuration, the heating unit has a large heat exchange area, which can quickly cool down the coating solution.

[0020] In one embodiment, the heating unit extends spirally along the circumference of the liquid storage container; the cooling unit also extends spirally along the circumference of the liquid storage container. The spirally extending heating and cooling units enable both heating and cooling of the liquid storage container.

[0021] In one embodiment, the liquid storage container includes:

[0022] The inner cylinder defines the receiving cavity; and

[0023] An outer cylinder is arranged around the inner cylinder and spaced apart from the inner cylinder;

[0024] The coating device includes at least two sets of temperature control components, with at least one set of temperature control components disposed inside the accommodating cavity and at least one set of temperature control components disposed outside the outer cylinder.

[0025] The annular cavity defined by the inner and outer cylinders contains the coating solution. The first temperature control component is located inside the inner cylinder, and the second temperature control component is located outside the outer cylinder. That is, the second temperature control component is located around the annular cavity containing the coating solution, and the first temperature control component is located inside the annular cavity containing the coating solution. This allows the solution to be heated or cooled from the outside and inside of the annular cavity respectively. The heat conduction speed is fast, and the temperature of the solution can be quickly controlled.

[0026] In one embodiment, the liquid storage container further includes:

[0027] A first support portion, located within the accommodating cavity, has at least one set of the temperature control components disposed on its outer surface; and

[0028] The second support portion is disposed on the outer side of the outer cylinder, and at least one set of the temperature control components are disposed on the outer side of the second support portion.

[0029] The first temperature control component is supported by the first support part, and the second temperature control component is supported by the second support part, which facilitates the arrangement of the temperature control components.

[0030] In one embodiment, the first support portion and the second support portion are fixedly connected;

[0031] The liquid storage container is pluggably disposed in the space formed between the first support portion and the second support portion.

[0032] When in operation, i.e., when providing the coating solution to the coating blade, the liquid reservoir is inserted into the annular space. When cleaning and maintenance of the liquid reservoir are required, it can be removed from the annular space, allowing for easy disassembly of the liquid reservoir from each temperature control component, thus facilitating cleaning and maintenance.

[0033] In one embodiment, the coating apparatus further includes an insulation layer; the insulation layer covers the temperature control component located outside the outer cylinder.

[0034] By wrapping the temperature control components on the outside of the outer cylinder with an insulation layer, heat exchange between the liquid storage container and the temperature control components and the external environment can be minimized, thus reducing heat loss.

[0035] In one embodiment, the heating unit includes a heating wire capable of heating the liquid storage container; or, the heating unit includes a heating pipe for the flow of a heat exchange medium.

[0036] The coating material inside the storage container can be easily heated by using heating wires or heating pipes.

[0037] In one embodiment, the cooling unit includes cooling pipes through which a cooling medium flows.

[0038] The cooling pipes facilitate heat dissipation from the coating material inside the liquid storage container.

[0039] In one embodiment, the liquid storage container is provided with a temperature measuring port; the temperature measuring port is used for inserting a temperature measuring device to measure the temperature of the solution to be coated.

[0040] Insert the temperature measuring end of the temperature measuring device into the temperature measuring port so that the temperature measuring end of the temperature measuring device can contact the solution to be coated in the liquid storage container, which facilitates the measurement of the temperature of the solution to be coated.

[0041] In one embodiment, the coating apparatus further includes a solution transfer device, a first conduit, and a second conduit;

[0042] The solution transfer device is connected to the liquid storage container through the first pipeline, and the solution transfer device is connected to the coating head through the second pipeline;

[0043] The solution transfer device is configured to extract the solution to be coated from the storage container and deliver the solution to be coated to the coating head.

[0044] The solution transfer device of this embodiment can draw solution from the storage container through the first pipeline and then output the solution to the coating head through the second pipeline, which facilitates the output of solution from the storage container to the coating head.

[0045] In one embodiment, the coating apparatus further includes a first heat-insulating device, which surrounds the outer periphery of the solution transfer device;

[0046] The first heat preservation device has a first heat preservation cavity arranged around the circumference of the solution transfer device. The first heat preservation cavity is constructed as a vacuum cavity or has a heat preservation filling material inside.

[0047] By wrapping the solution transfer device circumferentially with the first heat preservation device, the solution inside the solution transfer device can be kept warm, thereby reducing heat loss during the process of transferring the solution from the storage container to the coating head, and thus stabilizing the coating temperature of the solution as much as possible.

[0048] In one embodiment, the outer periphery of the first pipeline and the outer periphery of the second pipeline are respectively wrapped with an insulation layer.

[0049] By wrapping the outer periphery of the first pipeline and the outer periphery of the second pipeline respectively with heat insulation layers, heat loss during the process of delivering the solution from the liquid storage container to the coating head can be reduced, thereby stabilizing the coating temperature of the solution as much as possible.

[0050] In one embodiment, the coating apparatus further includes a second heat preservation device;

[0051] The second heat preservation device covers the outer surface of the coating blade, and the second heat preservation device has a second heat preservation cavity, which is either a vacuum cavity or has a heat preservation filler inside.

[0052] By covering the surface of the coating head with a second heat-insulating device, the solution inside the coating head can be kept warm, thereby reducing heat loss during the process of outputting the solution from the coating head to the substrate, and thus stabilizing the coating temperature of the solution as much as possible.

[0053] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0054] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiments below. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0055] Figure 1 This is a schematic diagram of the structure of a coating apparatus on a coating platform according to some embodiments of this application.

[0056] Figure 2 This is a schematic diagram of the connection structure between the temperature control component and the second support part in some embodiments of this application.

[0057] Figure 3 This is a schematic diagram of the connection structure between the temperature control component and the first support portion in some embodiments of this application.

[0058] Figure 4 This is a schematic diagram showing the positional relationship of the liquid storage container, the first support portion, and the second support portion in some embodiments of this application.

[0059] Figure 5 This is a schematic diagram of the structure of a first heat preservation device according to some embodiments of this application.

[0060] Figure 6 This is a schematic diagram of the connection structure between the second heat preservation device and the coating blade head in some embodiments of this application.

[0061] The reference numerals in the detailed embodiments are as follows:

[0062] 10. Coating platform; 20. Sample support; 30. Substrate; 40. Blade head support frame;

[0063] 100. Coating blade; 110. First lip; 120. Second lip;

[0064] 200. Liquid storage container; 210. Inner cylinder; 220. Outer cylinder; 230. End ring wall; 201. Temperature measurement port; 202. Liquid port;

[0065] 300. Heating unit; 310. First heating section; 320. Second heating section;

[0066] 400. Cooling unit; 410. First cooling section; 420. Second cooling section;

[0067] 500. First load-bearing section;

[0068] 600. Second load-bearing section;

[0069] 700. Solution transfer device; 710. First insulation device; 711. Inner insulation ring wall; 712. Outer insulation ring wall; 713. Insulation end wall; 714. Receiving cavity;

[0070] 810, First pipeline; 820, Second pipeline;

[0071] 900. Second insulation device. Detailed Implementation

[0072] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0073] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein 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 specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0074] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0075] In this document, the term "embodiment" means that a particular 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 separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0076] In the description of the embodiments 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, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0077] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0078] In the description of the embodiments of this application, the technical terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this 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, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0079] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0080] Currently, judging from market trends, the application of battery devices is becoming increasingly widespread. Battery devices are not only used in energy storage power systems such as hydropower, thermal power, wind power, and solar power plants, but also widely applied in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in military equipment and aerospace. With the continuous expansion of battery device applications, market demand is also constantly increasing. Among them, perovskite batteries have attracted much attention due to their high photoelectric conversion efficiency and ease of large-scale fabrication. In common perovskite battery fabrication methods, a perovskite solution is coated onto a substrate using a coating device to form a perovskite liquid film, which is then dried, crystallized, and annealed to form a perovskite film layer.

[0081] To ensure that the coating apparatus can perform large-area coating and batch coating of multiple perovskite solar cell sample substrates, the total liquid storage capacity of the coating apparatus's storage container is typically large. The amount of solution required to coat a single perovskite solar cell sample substrate is relatively small compared to the total liquid storage capacity of the storage container.

[0082] The temperature of the solution inside the storage container is mainly affected by the ambient temperature. In the cleanroom where perovskite solar cells are fabricated, the ambient temperature typically ranges over a wide area (24°C). o C-29 oC) Internal fluctuation leads to a large temperature range of the solution within the storage container, resulting in significant differences in the solution temperature applied to the substrates of various perovskite solar cell samples during batch coating. This leads to poor film consistency among different perovskite solar cell samples. To address this, some related technical solutions incorporate a heating unit on the storage container of the coating apparatus. This heating unit heats the solution within the storage container, maintaining a stable temperature around a certain level. This helps ensure better temperature consistency of the solution applied to the substrates of various perovskite solar cell samples, thereby improving the film consistency among different perovskite solar cell samples.

[0083] However, the heating unit heats the solution in the storage container, causing the solution temperature to rise and the liquid film to evaporate rapidly, resulting in a faster crystallization rate and an excessively fast film formation rate. When coating large-area (e.g., 1m*2m) perovskite solar cell samples, the excessively fast evaporation rate of the liquid film leads to a significant difference in film formation time between the beginning and end of the coating area, resulting in poor uniformity among different regions of the film layer.

[0084] Based on the above considerations, in order to solve the problem of poor film consistency among different perovskite battery samples in batch coating in related technologies, this application designs a coating device. The control device can separately control the heating unit 300 and the cooling unit 400 to heat and cool the solution to be coated, facilitating the control of the temperature of the solution to be coated. On the one hand, it can make the solution to be coated in the storage container 200 fluctuate stably around a certain temperature, thereby maintaining a good consistency in the temperature of the solution coated on the substrates of each batch of battery samples, improving the film consistency of different battery samples. On the other hand, the temperature of the solution to be coated can be flexibly adjusted by heating and cooling, so that the temperature of the solution to be coated in the storage container 200 is at a suitable coating temperature, thereby making the evaporation rate of the liquid film appropriate. When performing large-area coating, the film formation time at the beginning and end of the coating area can be made as close as possible, thereby improving the uniformity between different areas of the film.

[0085] The coating apparatus disclosed in this application can be used not only to coat perovskite solutions during the preparation of perovskite batteries, but also to coat solutions during the preparation of other types of batteries. For example, coating technology is often used in the preparation of electrodes for lithium-ion batteries, and the coating apparatus disclosed in this application can also be used to coat solutions during the preparation of lithium-ion batteries. This application does not limit the type of solution coated by the coating apparatus.

[0086] Please combine Figures 1 to 2 , Figure 1 The following is a schematic diagram of the structure of a coating apparatus on a coating platform according to some embodiments of this application. Figure 2A schematic diagram of the connection structure between the temperature control component and the second support portion according to some embodiments of this application is shown.

[0087] The coating apparatus provided in this application includes a coating blade 100, a liquid storage container 200, and a temperature control assembly. The liquid storage container 200 is used to contain the coating solution and is connected to the coating blade 100. The temperature control assembly includes a heating unit 300 for heating the liquid storage container 200 and a cooling unit 400 for cooling the liquid storage container 200, wherein the heating unit 300 extends circumferentially along the liquid storage container 200, and the cooling unit 400 extends circumferentially along the liquid storage container 200.

[0088] Specifically, the liquid storage container 200 is connected to the coating head 100, thereby providing the coating head 100 with the coating solution to be coated. The coating head 100 can output the coating solution to the substrate 30 of the battery sample, thereby causing the coating solution to form a film on the substrate 30.

[0089] The heating unit 300 may or may not be in contact with the liquid storage container 200, as long as heat exchange with the liquid storage container 200 is possible. The cooling unit 400 may or may not be in contact with the liquid storage container 200, as long as heat exchange with the liquid storage container 200 is possible. The heating unit 300 may be located outside or inside the liquid storage container 200. The cooling unit 400 may be located outside or inside the liquid storage container 200.

[0090] The liquid storage container 200 is heated by a heating unit 300 extending circumferentially along the liquid storage container 200, thereby simultaneously heating the coating solution within the liquid storage container 200 at various circumferential positions, resulting in rapid and uniform heating. Similarly, the liquid storage container 200 is cooled by a cooling unit 400 extending circumferentially along the liquid storage container 200, thereby simultaneously cooling the coating solution within the liquid storage container 200 at various circumferential positions, resulting in rapid and uniform cooling.

[0091] The coating apparatus described above heats the liquid storage container 200 by means of a heating unit 300 extending circumferentially along the liquid storage container 200, thereby raising the temperature of the solution to be coated within the liquid storage container 200. Alternatively, it can cool the liquid storage container 200 by means of a cooling unit 400 extending circumferentially along the liquid storage container 200, thereby cooling the solution to be coated within the liquid storage container 200. This facilitates temperature control of the solution to be coated, allowing the temperature control component to maintain a stable temperature within the liquid storage container 200, thus ensuring good consistency in the temperature of the solution coated on the substrates of various battery samples in a batch coating process, and improving the consistency of the film layers among different battery samples. Moreover, the temperature control component can heat the solution to be coated in the liquid storage container 200, and it can also cool the solution to be coated in the liquid storage container 200. Therefore, the temperature of the solution to be coated can be flexibly adjusted so that the temperature of the solution to be coated in the liquid storage container 200 is at a suitable coating temperature, thereby making the evaporation rate of the liquid film appropriate. When performing large-area coating, the film formation time at the beginning and end of the coating area can be as close as possible, thereby improving the uniformity between different areas of the film layer.

[0092] The following describes the specific structure of the coating apparatus.

[0093] In one embodiment, the coating apparatus includes a control device. A temperature measuring device can measure the temperature within the liquid storage container 200. If the temperature measurement result is lower than a first preset value, it indicates that the temperature of the solution to be coated is too low. The control device can then control the heating unit 300 to heat the solution, thereby automatically heating it above the first preset value. If the temperature measurement result is higher than a second preset value, it indicates that the temperature of the solution to be coated is too high. The control device can then control the cooling unit 400 to cool the solution, thereby automatically cooling it below the second preset value. Thus, by controlling the heating unit 300 and the cooling unit 400 based on the temperature measurement result, the control device can regulate the temperature of the solution to be coated to between the first and second preset values. When the first and second preset values ​​are very close (e.g., a difference of 1°C), the temperature fluctuation range of the solution to be coated is small, meaning it can stably fluctuate around a certain temperature.

[0094] Understandably, the second preset value is greater than the first preset value. The control device is electrically connected to the temperature measuring device and is used to receive the measurement results from the temperature measuring device, thereby enabling it to control the heating unit 300 and the cooling unit 400 based on the measurement results. The control device may be, for example, a microcontroller, a microprocessor, or a controller. The temperature measuring device may be, for example, a thermocouple or a temperature sensor.

[0095] The first preset value can be pre-set in the control device, and the specific value can be customized, thus allowing flexible adjustment of the first preset value, i.e., the temperature of the coating solution. The second preset value can also be pre-set in the control device, and the specific value can be customized, thus allowing flexible adjustment of the second preset value, i.e., the temperature of the coating solution.

[0096] like Figure 1 As shown, in some embodiments, the coating apparatus includes a sample support 20, a blade support frame 40, and a blade drive mechanism (not shown). The blade drive mechanism is mounted on the blade support frame 40. In actual coating, the sample support 20 and the blade support frame 40 are respectively mounted on the coating platform 10. The substrate 30 is mounted on the sample support 20. The blade drive mechanism drives the coating blade 100 to move, thereby enabling the coating blade 100 to coat different positions on the substrate 30 with solution.

[0097] In other embodiments of the coating apparatus, the coating blade may be fixed in place, and the coating apparatus may include a conveying mechanism. By moving the sample support 20 and the substrate 30 on it through the conveying mechanism, the coating blade and the substrate 30 may move relative to each other, thus enabling the coating solution to be applied to different positions on the substrate 30.

[0098] In some embodiments, the cooling unit 400 includes cooling pipes through which a cooling medium flows.

[0099] Specifically, the cooling pipes have an inlet and an outlet. The inlet is for introducing the cooling medium, and the outlet is for allowing the cooling medium to flow out. Heat from the solution to be coated can be transferred to the cooling medium through the walls of the storage container 200 and the cooling pipes. The cooling medium flows out after passing through the cooling pipes, thus carrying away the heat from the solution to be coated. The cooling pipes can be in contact with the storage container 200 to transfer heat. Alternatively, the cooling pipes and the storage container 200 can not be in contact, and heat can be transferred through air or an intermediate component between them.

[0100] Please combine Figure 2 and Figure 3 , Figure 3 A schematic diagram of the connection structure between the temperature control component and the first support portion according to some embodiments of this application is shown. In some embodiments, the heating unit 300 includes multiple heating sections extending circumferentially along the liquid storage container 200, and the cooling unit 400 includes multiple cooling sections extending circumferentially along the liquid storage container 200.

[0101] Along the circumference of the liquid storage container 200, the heating unit 300 includes multiple tortuous heating sections, resulting in a larger heat exchange area and thus increasing the heating rate of the liquid storage container 200. Similarly, the cooling unit 400 includes multiple tortuous cooling sections, resulting in a larger heat exchange area and thus increasing the cooling rate of the liquid storage container 200.

[0102] Please combine Figure 2 and Figure 3 In some embodiments, the cooling unit 400 includes multiple first cooling sections 410 and multiple second cooling sections 420. The first cooling sections 410 extend along the depth direction of the liquid storage container 200, and the multiple first cooling sections 410 are spaced apart circumferentially along the liquid storage container 200. Each second cooling section 420 connects two adjacent first cooling sections 410.

[0103] Specifically, in any three adjacent first cooling sections 410, a second cooling section 420 is provided at both ends of the middle first cooling section 410. One end of the middle first cooling section 410 is connected to the end of an adjacent first cooling section 410, and the other end of the middle first cooling section 410 is connected to the end of another adjacent first cooling section 410, thus forming a structure in which the cooling unit 400 extends circumferentially along the liquid storage container 200. This configuration results in a larger heat exchange area for the cooling unit, enabling rapid cooling of the solution to be coated.

[0104] In other embodiments, the cooling unit includes multiple first cooling sections and multiple second cooling sections, which are sequentially and alternately connected along the circumference of the liquid storage container. The angle between adjacent first and second cooling sections is acute or obtuse, i.e., they are inclined to each other.

[0105] In other embodiments, the cooling unit may be in a tortuous form, which will not be listed hereafter.

[0106] In some embodiments, the heating unit 300 includes a heating wire for heating the liquid storage container 200. Applying electricity to the heating wire causes it to heat up, thereby heating the solution to be coated.

[0107] In other alternative embodiments, the heating unit can also have other structural forms, not limited to cooling pipes. For example, heating unit 300 includes a heating pipe for the flow of heat exchange medium. The heating pipe has an inlet and an outlet; the inlet is for introducing the heat exchange medium, and the outlet is for the outlet of the heat exchange medium. As the heat exchange medium passes through the heating pipe, it can transfer heat to the coating solution through the pipe wall and the container wall of the liquid storage container 200. The heating pipe may contact the liquid storage container 200 to transfer heat. Alternatively, the heating pipe and the liquid storage container 200 may not be in contact, and heat may be transferred through air or an intermediate component between them.

[0108] Please combine Figure 2 and Figure 3 In some embodiments, the heating unit 300 includes multiple first heating sections 310 and multiple second heating sections 320. The first heating sections 310 extend along the depth direction of the liquid storage container 200, and the multiple first heating sections 310 are spaced apart circumferentially along the liquid storage container 200. Each second heating section 320 is used to connect two adjacent first heating sections 310.

[0109] Specifically, in any three adjacent first heating sections 310, second heating sections 420 are respectively provided at both ends of the middle first heating section 310. One end of the middle first heating section 310 is connected to the end of an adjacent first heating section 310, and the other end of the middle first heating section 310 is connected to the end of another adjacent first heating section 310, thus forming a structure with multiple repeated bends in the heating unit 300. This configuration results in a larger heat exchange area for the heating unit 300, enabling rapid cooling of the solution to be coated.

[0110] In other embodiments, the heating unit includes multiple first heating sections and multiple second heating sections, which are alternately connected sequentially along the circumference of the liquid storage container. The angle between adjacent first heating sections and second heating sections is an acute angle, i.e., they are inclined to each other.

[0111] In other embodiments, the heating unit may be in a tortuous form, which will not be listed hereafter.

[0112] Please combine Figure 2 and Figure 3 In some embodiments, in a single temperature control assembly, two first heating sections 310 and two first cooling sections 410 are alternately arranged along the circumference of the liquid storage container 200, so that the second heating section 320 and the second cooling section 420 are arranged in a one-to-one correspondence along the axial direction of the liquid storage container 200.

[0113] Please combine Figure 2 and Figure 3Understandably, in a single temperature control component, along the circumference of the liquid storage container 200 (either clockwise or counterclockwise), the arrangement of the first heating section 310 and the first cooling section 410 is as follows: two first heating sections 310, two first cooling sections 410, two first heating sections 310, two first cooling sections 410, and so on. That is, two adjacent first cooling sections 410 are respectively arranged on both sides of two first heating sections 310, and two adjacent first heating sections 310 are respectively arranged on both sides of two first cooling sections 410. Correspondingly, each second heating section 320 is provided with a corresponding second cooling section 420 on one side along the axial direction of the liquid storage container 200.

[0114] With this arrangement, the cooling unit 400 and the heating unit 300 form a nested arrangement along the axial direction of the liquid storage container 200, which makes full use of space and results in a compact arrangement.

[0115] In other embodiments, the heating unit may not consist of multiple, tortuous heating segments; for example, it may be a single heating segment. When the heating unit is a single segment, the single heating segment spirals around the circumference of the liquid storage container. When the heating unit is a single segment, it may also extend along the circumferential contour shape of the cross-section of the liquid storage container (the cross-section perpendicular to the depth direction of the liquid storage container), such as a circle, a square, etc.

[0116] Similarly, the cooling unit may not consist of multiple, meandering cooling sections; for example, it may be a single cooling section. When the cooling unit is a single section, this single cooling section spirals around the circumference of the liquid storage container. When the cooling unit is a single section, it may also extend along the circumferential contour shape of the cross-section of the liquid storage container (the cross-section perpendicular to the depth direction of the liquid storage container), such as a circle, a square, etc.

[0117] Please combine Figure 2 and Figure 4 , Figure 4 A schematic diagram showing the positional relationship of the liquid storage container, the first support portion, and the second support portion according to some embodiments of this application is shown.

[0118] In some embodiments, the liquid storage container 200 includes an inner cylinder 210 and an outer cylinder 220. The inner cylinder 210 defines a receiving cavity for containing the solution to be coated. The outer cylinder 220 is disposed around the inner cylinder 210 and spaced apart from the inner cylinder 210, and the annular cavity between the outer cylinder 220 and the inner cylinder 210 can contain the solution to be coated. The coating apparatus includes at least two sets of temperature control components, with at least one set of temperature control components disposed within the receiving cavity and at least one set of temperature control components disposed on the outer side of the outer cylinder 220.

[0119] Specifically, the liquid storage container 200 also includes two end annular walls 230. The two end annular walls 230 are respectively disposed at both ends of the inner cylinder 210 and the outer cylinder 220. The inner periphery of the end annular wall 230 is connected to the end of the inner cylinder 210, and the outer periphery of the end annular wall 230 is connected to the end of the outer cylinder 220. Thus, the annular cavity defined between the end annular walls 230, the inner cylinder 210, and the outer cylinder 220 can accommodate the solution to be coated.

[0120] The temperature control component within the cavity defined by the inner cylinder 210 is defined as the first temperature control component. The number of first temperature control components can be any number, such as one set or two sets. The temperature control component outside the outer cylinder 220 is defined as the second temperature control component. The number of second temperature control components can be any number, such as one set or two sets. The first temperature control component can transfer heat to the inner cylinder 210 through contact or through air without contact. The second temperature control component can transfer heat to the outer cylinder 220 through contact or through air without contact.

[0121] The annular cavity defined by the inner cylinder 210 and the outer cylinder 220 contains the coating solution. The second temperature control component is located on the outside of the outer cylinder 220, and the first temperature control component is located on the inside of the inner cylinder 210. That is, the second temperature control component is located on the periphery of the annular cavity containing the coating solution, and the first temperature control component is located on the inside of the annular cavity containing the coating solution. This allows the solution to be heated or cooled from the outside and inside of the annular cavity respectively. The heat conduction speed is fast, and the temperature of the solution can be quickly controlled.

[0122] Please refer to Figure 4 In some embodiments, the coating apparatus further includes a first support portion 500 and a second support portion 600. The first support portion 500 is located within the accommodating cavity, and at least one set of temperature control components is disposed on its outer surface. The second support portion 600 is disposed on the outer side of the outer cylinder 220, and at least one set of temperature control components is disposed on its outer surface.

[0123] The temperature control component provided on the outer surface of the first support portion 500 is the first temperature control component. The temperature control component provided on the outer surface of the second support portion 600 is the second temperature control component.

[0124] The first support portion 500 can be a solid or hollow structure, as long as it can support the temperature control component (first temperature control component). The second support portion 600 has an internally hollow structure, so it can surround the outer cylinder 220. The second support portion 600 may or may not be in contact with the outer cylinder 220.

[0125] The first temperature control component is supported by the first support part 500, and the second temperature control component is supported by the second support part 600, which facilitates the arrangement of the temperature control components.

[0126] Please refer to Figure 4In some embodiments, the central axes of the first support portion 500 and the second support portion 600 coincide with the central axis of the inner cylinder 210. The first support portion 500 and the second support portion 600 are fixedly connected. The liquid storage container 200 is pluggably disposed in the space formed between the first support portion 500 and the second support portion 600.

[0127] The first support portion 500 and the second support portion 600 can be fixed relative to each other by a connector, such as a connecting plate or other connector provided at the ends of the first support portion 500 and the second support portion 600. An annular space can be defined between the first support portion 500 and the second support portion 600, so that the liquid storage container 200 can be inserted into the annular space, and the liquid storage container 200 can also be removed from the annular space.

[0128] When in operation, i.e., when providing the coating solution to the coating blade, the liquid storage container 200 is inserted into the annular space. When cleaning and maintenance of the liquid storage container 200 are required, it can be removed from the annular space, allowing for easy disassembly of the container from each temperature control component and facilitating cleaning and maintenance. Furthermore, after cleaning and maintenance, the liquid storage container 200 can be easily reinstalled into the annular space.

[0129] In some embodiments, the coating apparatus further includes an insulation layer. The insulation layer covers a temperature control component located outside the outer cylinder 220.

[0130] Specifically, the materials used in the insulation layer include, for example, rubber and foam.

[0131] By wrapping the temperature control component on the outside of the outer cylinder 220 with an insulation layer, heat exchange between the liquid storage container 200 and the temperature control component and the external environment can be minimized, thus reducing heat loss.

[0132] Please refer to Figure 4 In some embodiments, the liquid storage container 200 is provided with a temperature measuring port 201. The temperature measuring port 201 is used for inserting a temperature measuring device to measure the temperature of the solution to be coated.

[0133] Specifically, the temperature measuring end of the temperature measuring device is inserted into the temperature measuring port 201, so that the temperature measuring end of the temperature measuring device can contact the solution to be coated in the liquid storage container 200, facilitating the measurement of the temperature of the solution to be coated. The temperature measuring device is, for example, a temperature sensor, a thermocouple, etc.

[0134] Please refer to Figure 4 In some embodiments, the liquid storage container 200 is provided with a liquid inlet 202. Solution can be injected into the liquid storage container 200 through the liquid inlet 202. The liquid inlet 202 can also be connected to the coating head 100 through a pipeline, thereby outputting solution to the coating head 100.

[0135] In some embodiments, in response to the temperature measurement result being lower than a first preset value, the control device controls the heating unit 300 to heat the solution to be coated.

[0136] Taking the heating wire as an example, the temperature control component also includes a drive circuit and a control device. The control device receives the measurement results from the temperature measuring device. In response to the temperature measuring device's result being lower than a first preset value, the control device outputs a signal to the drive circuit, causing the drive circuit to supply power to the heating wire, thereby heating the coating solution. The control device can be, for example, a microcontroller, a microprocessor, or a controller.

[0137] In this embodiment, in response to the temperature measurement result being lower than the first preset value, the control device controls the heating unit 300 to heat the solution to be coated, thereby enabling the heating unit 300 to automatically heat the solution to be coated to above the first preset value, and thus enabling the temperature of the solution to be coated to fluctuate stably around the first preset value.

[0138] In some embodiments, in response to the temperature measurement result being higher than a second preset value, the control device controls the cooling unit 400 to cool the coating solution.

[0139] Specifically, the inlet and outlet of the cooling pipe are used to connect to an external heat exchanger to form a cooling circulation loop. The inlet of the cooling pipe is connected to the outlet of the external heat exchanger, and the outlet of the cooling pipe is connected to the return port of the external heat exchanger, thus forming a cooling circulation loop. The temperature control component includes a control device and a power device. The power device is located in the cooling circulation loop, for example, on the cooling pipe or on the connecting pipe between the cooling pipe and the external heat exchanger.

[0140] In response to the temperature measurement result being higher than the second preset value, the control device outputs a signal to the power unit so that the power unit provides power for the cooling medium to circulate in the cooling loop, thereby cooling the solution.

[0141] In this embodiment, in response to the temperature measurement result being higher than the second preset value, the control device controls the cooling unit 400 to cool the coating solution, thereby enabling the cooling unit 400 to automatically cool the coating solution below the second preset value, and thus allowing the temperature of the coating solution to fluctuate stably around the second preset value. The power unit is, for example, a circulating pump.

[0142] In other embodiments, when the heating unit is a heating pipe, in response to the temperature measurement result being lower than a first preset value, the control device outputs a signal to the power device so that the power device provides power for the heat exchange medium to circulate in the heating loop.

[0143] Please refer to Figure 1 In one embodiment, the coating apparatus further includes a solution transfer device 700, a first conduit 810, and a second conduit 820. The solution transfer device 700 is connected to the liquid storage container 200 through the first conduit 810 and to the coating head 100 through the second conduit 820. The solution transfer device 700 is configured to extract the coating solution from the liquid storage container 200 and output the coating solution to the coating head 100.

[0144] The solution transfer device 700 is, for example, a pump. The solution transfer device 700 can also be a syringe.

[0145] The solution transfer device 700 of this embodiment can draw solution from the storage container 200 through the first pipeline 810 and output the solution to the coating head 100 through the second pipeline 820, which facilitates the output of solution from the storage container 200 to the coating head 100.

[0146] Please refer to Figure 5 , Figure 5 A schematic diagram of the structure of a first heat-insulating device according to some embodiments of this application is shown. In one embodiment, the coating apparatus further includes a first heat-insulating device 710, which surrounds the outer periphery of the solution transfer device 700. The first heat-insulating device 710 has a first heat-insulating cavity arranged circumferentially around the solution transfer device 700. The first heat-insulating cavity is a vacuum cavity or has a heat-insulating filler inside.

[0147] Specifically, the first insulation device 710 has a ring structure, including an inner insulation ring wall 711, an outer insulation ring wall 712, and an insulation end wall 713. The outer insulation ring wall 712 surrounds the outer periphery of the inner insulation ring wall 711. Insulation end walls 713 are respectively provided at both ends of the inner insulation ring wall 711 and the outer insulation ring wall 712. The outer periphery of the insulation end wall 713 is connected to the outer insulation ring wall 712, and the inner periphery of the insulation end wall 713 is connected to the inner insulation ring wall 711, thereby defining the first insulation cavity by the inner insulation ring wall 711, the outer insulation ring wall 712, and the insulation end wall 713.

[0148] The first insulation chamber can be a vacuum chamber. The first insulation chamber can be filled with insulation materials, such as foam or cotton foam.

[0149] By wrapping the solution transfer device 700 circumferentially with the first heat preservation device 710, the solution inside the solution transfer device 700 can be kept warm, thereby reducing heat loss during the process of transferring the solution from the liquid storage container 200 to the coating head 100, and thus stabilizing the coating temperature of the solution as much as possible.

[0150] In one embodiment, the outer periphery of the first pipe 810 and the outer periphery of the second pipe 820 are respectively wrapped with an insulation layer. Specifically, the insulation layer can be made of materials such as foam or rubber.

[0151] By wrapping the outer periphery of the first pipeline 810 and the outer periphery of the second pipeline 820 with heat insulation layers, heat loss during the process of conveying the solution from the liquid storage container 200 to the coating head 100 can be reduced, thereby stabilizing the coating temperature of the solution as much as possible.

[0152] Please refer to Figure 6 , Figure 6 The diagram illustrates the connection structure between the first heat-insulating device and the coating blade head according to some embodiments of this application. In some embodiments, the coating device further includes a second heat-insulating device 900, which covers the outer surface of the coating blade head 100. The second heat-insulating device 900 has a second heat-insulating cavity inside, which is either a vacuum cavity or has a heat-insulating filler inside.

[0153] The second insulation chamber can be a vacuum chamber. The second insulation chamber can also contain insulation fillers, such as foam materials or foam cotton. The coating blade 100 and the second insulation device 900 can be detachably connected by bolts or other means, facilitating the disassembly of the coating blade 100 and the second insulation device 900 for maintenance and cleaning.

[0154] By covering the surface of the coating head 100 with the second heat preservation device 900, the solution inside the coating head 100 can be kept warm, thereby reducing heat loss during the process of outputting the solution from the coating head 100 to the substrate 30, and thus stabilizing the coating temperature of the solution as much as possible.

[0155] Please refer to Figure 6 In some embodiments, the coating head 100 includes a first blade 110 and a second blade 120 that are disposed opposite to each other and fixedly connected, and a slit for discharging the coating solution is defined between the first blade 110 and the second blade 120. A second heat preservation device 900 is respectively provided on the side of the first blade 110 and the second blade 120 that are opposite to each other.

[0156] Specifically, in this embodiment, the coating head 100 is a slit coating head. A gasket can be sandwiched between the first blade 110 and the second blade 120 to define the slit. The first blade 110 and the corresponding second insulation device 900, and the second blade 120 and the corresponding second insulation device 900, can be detachably connected by bolts or other means, so that the first blade 110 and the second blade 120 can be disassembled separately for maintenance and cleaning.

[0157] Since the first blade 110 and the second blade 120 are respectively provided with a second heat preservation device 900 on the opposite side, the solution in the coating head 100 can be sufficiently kept warm, reducing heat loss during the process of outputting the solution from the coating head 100 to the substrate 30, thereby stabilizing the coating temperature of the solution as much as possible.

[0158] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. 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 by comprising: The coating device comprises: a coating blade; a solution storage container for containing a solution to be coated and connected with the coating blade; a temperature control assembly comprising a heating unit for heating the solution storage container and a cooling unit for cooling the solution storage container, wherein the heating unit extends along the circumference of the solution storage container, and the cooling unit extends along the circumference of the solution storage container.

2. The coating apparatus according to claim 1, wherein The heating unit comprises a plurality of heating segments extending along the circumference of the solution storage container in a meandering manner, and the cooling unit comprises a plurality of cooling segments extending along the circumference of the solution storage container in a meandering manner.

3. The coating device according to claim 2, wherein: the cooling unit comprises a plurality of first cooling segments extending along the depth direction of the solution storage container and a plurality of second cooling segments, the first cooling segments are arranged in the circumferential direction of the solution storage container at intervals, and each second cooling segment is used to communicate two adjacent first cooling segments; and / or the heating unit comprises a plurality of first heating segments extending along the depth direction of the solution storage container and a plurality of second heating segments, the first heating segments are arranged in the circumferential direction of the solution storage container at intervals, and each second heating segment is used to communicate two adjacent first heating segments.

4. The coating apparatus according to claim 1, wherein The heating unit extends in a spiral manner along the circumference of the solution storage container; and the cooling unit extends in a spiral manner along the circumference of the solution storage container.

5. The coating apparatus according to any one of claims 1 to 4, characterized in that The solution storage container comprises: an inner cylinder defining a receiving cavity; and an outer cylinder arranged around the inner cylinder and spaced apart from the inner cylinder; wherein the coating device comprises at least two groups of the temperature control assembly, at least one group of the temperature control assembly is arranged in the receiving cavity, and at least one group of the temperature control assembly is arranged on the outer side of the outer cylinder.

6. The coating apparatus according to claim 5, wherein The solution storage container further comprises: a first bearing part arranged in the receiving cavity, and at least one group of the temperature control assembly is arranged on the outer side of the first bearing part; and a second bearing part arranged on the outer side of the outer cylinder, and at least one group of the temperature control assembly is arranged on the outer side of the second bearing part.

7. The coating device according to claim 6, wherein: the first bearing part is fixedly connected with the second bearing part; the solution storage container is pluggably arranged in the space formed between the first bearing part and the second bearing part.

8. The coating apparatus according to claim 5, wherein The coating device further comprises a heat preservation layer covering the temperature control assembly arranged on the outer side of the outer cylinder.

9. The coating apparatus according to any one of claims 1 to 4, characterized in that The heating unit comprises an electric heating wire capable of heating the solution storage container; or the heating unit comprises a heating pipeline for flowing a heat exchange medium.

10. The coating apparatus according to any one of claims 1 to 4, characterized in that The cooling unit comprises a cooling pipeline for flowing a cooling medium.

11. The coating apparatus according to claim 1, wherein A temperature measuring port is arranged on the solution storage container, and the temperature measuring port is used for inserting a temperature measuring device to measure the temperature of the solution to be coated.

12. The coating apparatus of claim 1, wherein, The coating device further comprises a solution transfer device, a first pipeline and a second pipeline; the solution transfer device is connected with the solution storage container through the first pipeline, and the solution transfer device is connected with the coating blade through the second pipeline. The solution transfer device is configured to draw the solution to be coated in the solution storage container and deliver the solution to the coating knife head.

13. The coating apparatus of claim 12, wherein, The coating device further comprises a first heat preservation device, which is wrapped around the outer circumferential side of the solution transfer device. The first heat preservation device is provided with a first heat preservation cavity arranged along the circumferential direction of the solution transfer device, and the first heat preservation cavity is configured as a vacuum cavity or is provided with heat preservation fillers.

14. The coating apparatus of claim 12, wherein, The outer periphery of the first pipeline and the outer side of the second pipeline are respectively wrapped with a heat preservation layer.

15. The coating apparatus according to any one of claims 1 to 4, wherein The coating device further comprises a second heat preservation device. The second heat preservation device covers the outer surface of the coating knife head, and the second heat preservation device is provided with a second heat preservation cavity, which is a vacuum cavity or is provided with heat preservation fillers.

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