Drying apparatus, control method, control apparatus, device, storage medium, and program product

Abstract

The present application relates to a drying apparatus, a control method, a control apparatus, a device, a storage medium, and a program product. The drying apparatus comprises a laser, the laser being disposed outside a drying oven, and being configured for emitting, according to current laser power, a laser beam to a beam-homogenizing lens assembly located within the drying oven and corresponding to the laser; the beam-homogenizing lens assembly is configured for processing the laser beam so as to obtain a homogenized laser spot irradiated onto a coating layer of a substrate; a pyrometer, the pyrometer being disposed within the drying oven and configured for measuring a temperature of the coating layer and sending the temperature to a controller; and the controller, which is electrically connected to the laser and the pyrometer and configured for controlling laser power of the laser according to the temperature, so as to control the temperature of the coating layer by controlling the laser power of the laser, thereby lowering the likelihood of excessively high temperatures during coating layer drying processes, and increasing safety during coating layer laser heating processes.

Description

Drying apparatus, control methods, control devices, equipment, storage media, and process products Cross-referencing

[0001] This application incorporates Chinese Patent Application No. 2024119773645, filed on December 30, 2024, entitled “Drying apparatus, control method, control device, equipment, storage medium and program product”, which is incorporated herein by reference in its entirety. Technical Field

[0002] This application relates to the field of battery electrode drying technology, and in particular to a drying apparatus, control method, control device, equipment, storage medium, and program product. Background Technology

[0003] Battery electrodes consist of two parts: a substrate and a coating. The substrate is made of copper or aluminum foil, and the coating is a paste. The production process typically involves heating the substrate coated with paste in an oven to remove moisture from the coating, making the substrate drier and more stable, before it is formed into electrodes.

[0004] Currently, lasers are used to dry coatings applied by lithium battery coating machines. However, due to the high energy density of lasers, ablation, combustion, and even explosion may occur during the drying process, causing harm to personnel. Therefore, improving the safety of laser heating of coatings has become an urgent problem to be solved in this field. Summary of the Invention

[0005] Therefore, it is necessary to provide a drying device, control method, control device, equipment, storage medium, and program product that can improve the safety of the laser heating process in response to the above-mentioned technical problems.

[0006] In a first aspect, this application provides a drying apparatus, which includes:

[0007] A laser, located outside the oven, is used to emit laser light into the homogenizing lens assembly corresponding to the laser inside the oven according to the current laser power.

[0008] A uniform light lens assembly is used to process laser light to obtain a uniform light spot that is irradiated onto the coating of a substrate.

[0009] A temperature measuring instrument, installed inside the oven, is used to detect the temperature of the coating and send the temperature data to the controller.

[0010] The controller is electrically connected to the laser and the thermometer and is used to control the laser power of the laser according to the temperature.

[0011] The drying apparatus provided in this embodiment uses a laser to emit laser light to a homogenizing lens assembly according to the current laser power. The homogenizing lens assembly processes the laser light to obtain a homogenized spot on the coating of the substrate. A temperature measuring instrument detects the temperature of the coating and sends the temperature to a controller. The controller controls the laser power of the laser according to the temperature, thereby controlling the temperature of the coating by controlling the laser power, reducing the probability of excessive temperature during the coating drying process, and improving the safety of the laser heating process of the coating.

[0012] In one embodiment, if the temperature difference between the target temperature and the preset temperature is within the preset temperature range, the controller maintains the current laser power.

[0013] If the target temperature difference is outside the preset temperature range, the controller adjusts the current laser power.

[0014] The drying device provided in this embodiment maintains the current laser power when the temperature difference between the target temperature and the preset temperature is within the preset temperature range, and adjusts the current laser power when the target temperature difference is outside the preset temperature range. This achieves temperature control of the coating, reduces the possibility of the coating temperature being too high or too low, and improves the safety and heating efficiency of the laser heating process.

[0015] In one embodiment, if the target temperature difference is less than the lower limit of the preset temperature range, the controller determines the first target laser power corresponding to the target temperature difference based on the correspondence between the temperature difference and the laser power, and adjusts the current laser power to the first target laser power; the first target laser power is greater than the current laser power.

[0016] The drying device provided in this embodiment, when the target temperature difference is less than the lower limit of the preset temperature range, determines the first target laser power corresponding to the target temperature difference based on the correspondence between the temperature difference and the laser power, and adjusts the current laser power to the first target laser power, thereby controlling the temperature of the coating and improving the drying efficiency of the coating.

[0017] In one embodiment, if the target temperature difference is greater than the upper limit of the preset temperature range, the controller determines the second target laser power corresponding to the target temperature difference based on the correspondence between the temperature difference and the laser power, and adjusts the current laser power to the second target laser power; the second target laser power is less than the current laser power.

[0018] The drying device provided in this embodiment, when the target temperature difference is greater than the upper limit of the preset temperature range, determines the second target laser power corresponding to the target temperature difference based on the correspondence between the temperature difference and the laser power, and adjusts the current laser power to the second target laser power, thereby controlling the temperature of the coating, reducing the probability of excessive temperature during the coating drying process, and improving the safety of the laser heating process of the coating.

[0019] In one embodiment, when coating is applied to the surface of a substrate, the controller determines the initial laser power based on the substrate's conveyor speed and a preset correspondence, and outputs the initial laser power to the laser; the correspondence includes the correspondence between different substrate conveyor speeds and different laser powers.

[0020] The laser is used to emit laser light into the homogenizing lens assembly according to the initial laser power.

[0021] The drying apparatus provided in this embodiment, when coating the surface of a substrate by means of a controller, determines the initial laser power according to the substrate's conveyor speed and a preset correspondence, and outputs the initial laser power to the laser. The laser is then emitted to the uniform lens assembly according to the initial laser power, thereby controlling the initial laser power of the laser according to the conveyor speed, so that the initial laser power of the laser is within a reasonable range, thereby improving the efficiency and safety of heating the coating.

[0022] In one embodiment, the drying apparatus further includes a color mark sensor located at the oven inlet; used to detect color information on the coating and send the color information to the controller;

[0023] The controller is used to determine whether to coat the surface of the substrate based on color information.

[0024] The drying device provided in this embodiment detects the color information on the coating by setting a color mark sensor at the entrance of the oven and sends the color information to the controller. The controller then determines whether to coat the surface of the substrate, i.e. whether to perform gravure coating, based on the color information. If gravure coating is determined, the initial laser power is determined and the laser is controlled to emit light according to the initial laser power to heat the coating.

[0025] In one embodiment, the homogenizing lens assembly includes a first homogenizing lens assembly, which is disposed opposite to a first surface of the coating, for processing the laser to obtain a homogenized light spot irradiated onto the first surface of the coating.

[0026] The drying apparatus provided in this embodiment dries the first surface of the coating by setting the first homogenizing lens assembly opposite to the first surface of the coating, thereby processing the laser to obtain a homogenized light spot that irradiates the first surface of the coating.

[0027] In one embodiment, the homogenizing lens assembly further includes a second homogenizing lens assembly, which is disposed opposite to the second surface of the coating and is used to process the laser to obtain a homogenized light spot irradiated onto the second surface of the coating.

[0028] The drying apparatus provided in this embodiment, by setting the second uniform light lens assembly opposite to the second surface of the coating and setting the first uniform light lens assembly opposite to the first surface of the coating, achieves the processing of laser to obtain uniform light spots irradiating the first and second surfaces of the coating, and can simultaneously dry the two surfaces of the coating, further improving the drying efficiency.

[0029] In one embodiment, the light-diffusing lens assembly includes a frame, a first adjustment mechanism, and a light-blocking plate. The first adjustment mechanism and the light-blocking plate are connected to the frame, and the light-blocking plate is positioned toward the light-diffusing lens in the light-diffusing lens assembly.

[0030] The controller is used to control the first adjustment mechanism to move the light-blocking plate according to the size of the substrate in the target direction, so that the size of the uniform light spot irradiated in the target direction is consistent with the length of the substrate in the target direction; the target direction is perpendicular to the belt travel direction of the substrate.

[0031] The drying apparatus provided in this embodiment controls the first adjustment mechanism to move the light-blocking plate according to the size of the substrate in the target direction by the controller, so that the size of the homogenized light spot irradiating in the target direction is consistent with the length of the substrate in the target direction. This enables the homogenized light spot to cover the length of the substrate in the target direction, so that all areas of the substrate in the target direction can be heated, thereby improving heating efficiency and reducing the possibility of laser leakage.

[0032] In one embodiment, the drying apparatus further includes a displacement sensor disposed on the inner side wall of the oven and close to the substrate; the light-diffusing lens assembly further includes a second adjustment mechanism and a light-diffusing lens, which are connected to the frame.

[0033] The displacement sensor is used to detect the jitter offset of the substrate in the target direction and send the jitter offset to the controller;

[0034] The controller is used to control the second adjustment mechanism to move the homogenizing lens based on the jitter offset, so that the homogenized light spot covers the substrate in the target direction of the substrate.

[0035] The drying apparatus provided in this embodiment detects the shaking offset of the substrate in the target direction using a displacement sensor and sends the shaking offset to the controller. Based on the shaking offset, the controller controls the second adjustment mechanism to move the uniform light lens, so that the uniform light spot covers the substrate in the target direction, thereby heating each area of ​​the substrate along the target direction and improving heating efficiency.

[0036] In one embodiment, the light-diffusing lens assembly further includes a lens protection device mounted on the frame for isolating the light-diffusing lens in the light-diffusing lens assembly from contact with air.

[0037] The drying device provided in this embodiment isolates the uniform light lens in the uniform light lens assembly from contact with air through a lens protection device, thereby reducing the probability of the lens being contaminated by slurry and other foreign objects during normal production or tape breakage, reducing the probability of the slurry and other foreign objects being heated to high temperature and burning, and reducing the probability of evaporated water vapor condensing on the lens, thus protecting the lens.

[0038] In one embodiment, the drying device further includes a proximity sensor disposed on the door frame of the access door of the oven, for detecting a target object on the access door to generate a target signal and sending the target signal to the controller;

[0039] When the target signal indicates that the maintenance door is open, the controller sends a control signal to the laser; the control signal is used to control the laser to stop emitting light.

[0040] The drying device provided in this embodiment detects a target object on the maintenance door using a proximity sensor, generates a target signal, and sends the target signal to the controller. When the target signal indicates that the maintenance door is open, the controller sends a control signal to the laser to stop emitting light, thereby reducing the risk of laser leakage.

[0041] In one embodiment, the drying apparatus further includes a temperature sensor disposed at a target location inside the oven near the substrate, for detecting the temperature at the target location, generating a temperature signal, and sending the temperature signal to the controller;

[0042] If the temperature indicated by the temperature signal is higher than the preset ambient temperature, the controller will issue an alarm signal.

[0043] The drying device provided in this embodiment detects the temperature at the target location using a temperature sensor, generates a temperature signal, and sends the temperature signal to the controller. If the temperature indicated by the temperature signal is higher than the preset ambient temperature, the controller issues an alarm signal to indicate that the current ambient temperature is too high, so that relevant personnel can take measures to reduce the ambient temperature inside the drying oven based on the alarm signal.

[0044] In one embodiment, the drying device further includes a circulating fan, and the drying oven is provided with a return air chamber, an air outlet hull, and air nozzles;

[0045] The return air chamber and the outlet air hull are connected to the oven. The return air chamber is connected to the circulating fan through the first pipeline, and the outlet air hull is connected to the circulating fan through the second pipeline.

[0046] The circulating fan is used to send the air in the return air chamber into the outlet air hull through the second pipeline;

[0047] The air vent hull is used to blow air out through the nozzle to remove water vapor around the substrate.

[0048] The drying device provided in this embodiment can recycle the diffused air inside the oven and remove water vapor around the substrate through the recycled air, thereby improving the drying efficiency of the substrate.

[0049] In one embodiment, the drying device further includes a filter disposed in a second duct for filtering the air in the second duct and sending the filtered air into the outlet hull.

[0050] The drying device provided in this embodiment filters the air in the second pipeline and sends the filtered air into the air outlet hull, thereby improving the cleanliness of the air entering the air outlet hull and reducing the probability of dust, impurities, etc. in the air entering the air outlet hull.

[0051] Secondly, this application also provides a control method, which is applied to a controller in the drying apparatus of any of the above claims, the method comprising:

[0052] Receive the temperature of the coating on the substrate from the thermometer;

[0053] The laser power of the laser is controlled according to temperature.

[0054] The temperature is measured by a thermometer when the homogenizing lens assembly irradiates the coating of the substrate with a homogenizing spot. The homogenizing spot is the spot obtained by the homogenizing lens assembly processing the laser emitted by the laser from the laser corresponding to the laser in the oven according to the current laser power.

[0055] Thirdly, this application also provides a computer device. The computer device includes a memory and a processor, the memory storing a computer program, and the processor executing the computer program to implement the steps of any of the methods described above.

[0056] Fourthly, this application also provides a computer-readable storage medium. The computer-readable storage medium stores a computer program thereon, which, when executed by a processor, implements the steps of any of the methods described above.

[0057] Fifthly, this application also provides a computer program product. The computer program product includes a computer program that, when executed by a processor, implements the steps of any of the methods described above.

[0058] 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, specific embodiments of this application are given below. Attached Figure Description

[0059] 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:

[0060] Figure 1 is an axial view of a drying device provided in an embodiment of this application;

[0061] Figure 2 is a front view of a drying apparatus provided in an embodiment of this application;

[0062] Figure 3 is a top view of a drying apparatus provided in an embodiment of this application;

[0063] Figure 4 is a left view of a drying apparatus provided in an embodiment of this application;

[0064] Figure 5 is a cross-sectional view of a drying apparatus provided in an embodiment of this application;

[0065] Figure 6 is a schematic diagram of a homogenized light spot combination provided in an embodiment of this application;

[0066] Figure 7 is a front view of a uniform light lens assembly provided in an embodiment of this application;

[0067] Figure 8 is an axial view of a uniform light lens assembly provided in an embodiment of this application;

[0068] Figure 9 is a schematic diagram of a homogenized light spot distribution provided in an embodiment of this application;

[0069] Figure 10 is a flowchart illustrating another control method provided in an embodiment of this application;

[0070] Figure 11 is a structural block diagram of a control device provided in an embodiment of this application;

[0071] Figure 12 is a structural block diagram of another control device provided in an embodiment of this application;

[0072] Figure 13 is a structural block diagram of another control device provided in an embodiment of this application;

[0073] Figure 14 is an internal structure diagram of a computer device provided in an embodiment of this application. Detailed Implementation

[0074] 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.

[0075] 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.

[0076] 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.

[0077] 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.

[0078] 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.

[0079] 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).

[0080] Battery electrodes consist of two parts: a substrate and a coating. The substrate is copper or aluminum foil, and the coating is a slurry. The production process typically involves heating the substrate coated with slurry in an oven to remove moisture from the coating, making the substrate drier and more stable before it is formed into an electrode. The slurry includes coating slurry and gravure base coating slurry. The main components of the coating slurry include active materials, dispersants, binders, solvents, and additives; the coating thickness applied by a lithium battery coating machine is generally 100-500 micrometers. The base coating slurry for gravure base coating mainly includes conductive carbon black, binders, and water; the thickness of the gravure base coating is generally 2-8 micrometers. Electrodes produced without the gravure base coating process are ordinary electrodes, while electrodes produced with the gravure base coating process are gravure electrodes.

[0081] Currently, laser drying is used for coatings applied by lithium battery coating machines, but not for coatings applied by gravure coating machines. Furthermore, the high energy density of lasers during coating drying can lead to ablation, even combustion and explosion, causing injury. Therefore, improving the safety of laser heating of coatings is a pressing issue that needs to be addressed in this field.

[0082] To address the aforementioned technical problems, this application provides a drying apparatus. As shown in Figures 1, 2, 3, 4, and 5, Figure 1 is an axial view of a drying apparatus provided in this application, Figure 2 is a front view of a drying apparatus provided in this application, Figure 3 is a top view of a drying apparatus provided in this application, Figure 4 is a left view of a drying apparatus provided in this application, and Figure 5 is a cross-sectional view of a drying apparatus provided in this application.

[0083] The drying device includes a laser 11, which is disposed outside the oven 12 and is used to emit laser light into the homogenizing lens assembly corresponding to the laser 11 inside the oven 12 according to the current laser power.

[0084] A uniform light lens assembly is used to process laser light to obtain a uniform light spot that is irradiated onto the coating of a substrate.

[0085] A temperature measuring instrument is installed inside the oven 12 to detect the temperature of the coating and send the temperature to the controller 13;

[0086] The controller 13 is electrically connected to the laser 11 and the thermometer, and is used to control the laser power of the laser 11 according to the temperature.

[0087] Among them, the laser 11 can emit laser light through an optical fiber into the homogenizing lens assembly corresponding to the laser 11 inside the oven 12.

[0088] The coating in this embodiment can be a coating applied by a lithium battery coating machine or a coating applied by a gravure coating machine. That is, this embodiment can dry the coating using a laser, or it can dry the gravure coating using a laser. Currently, in the production of gravure electrodes, after coating by a gravure coating machine, the gravure plate enters an oven for drying to remove moisture from the coating, making the gravure plate drier and more stable. Currently, gravure ovens use a hot air circulation heating system, utilizing heat transfer oil to heat air to dry the gravure plate. The dried hot air is discharged through exhaust vents on both sides. However, in this drying process, the oven is 12-16 meters long, occupying a large space. The heat transfer efficiency between the heat transfer oil and air is low, resulting in high losses. Less than 10% of the energy is actually used for gravure drying, leading to low production efficiency. The drying device in this embodiment can be applied to drying gravure coatings. Due to the high energy density of the laser, the drying efficiency is high, thereby reducing the length of the oven and improving production efficiency.

[0089] The uniform light lens assembly processes the laser to obtain a uniform light spot that irradiates the coating on the substrate, thereby heating and drying the coating. Multiple uniform light lens assemblies can be used, each corresponding to a laser 11 and a temperature measuring instrument. The uniform light lens assembly can be positioned opposite the surface of the coating. The uniform light lens assembly may include a first uniform light lens assembly, positioned opposite a first surface of the coating, which can be either of the two surfaces of the coating. Alternatively, the uniform light lens assembly may include a first uniform light lens assembly and a second uniform light lens assembly, positioned opposite a second surface of the coating, thereby enabling drying of both sides of the coating. If some processes require coating only on one surface of the substrate, the uniform light spot is irradiated only through the uniform light lens assembly corresponding to that surface to dry the coating on that surface.

[0090] The temperature measuring instrument can be an infrared thermometer, a resistance temperature detector (RTD) thermometer, or other types of temperature measuring instruments. The temperature measuring instrument corresponding to the homogenizing lens assembly is used to detect the temperature of the coating when the homogenized light spot of the homogenizing lens assembly irradiates the coating.

[0091] During the laser drying process, the temperature of the coating is detected by a thermometer and sent to the controller 13, allowing the controller 13 to control the laser power of the laser 11 based on the coating temperature. For example, if the coating temperature is higher than the upper limit of a preset temperature range, the controller 13 can reduce the current laser power to decrease the possibility of overheating and improve safety during laser heating. If the coating temperature is lower than the lower limit of a preset temperature range, the controller 13 can increase the current laser power to improve heating efficiency. If the coating temperature is within the preset temperature range, the current laser power of the laser 11 can be maintained. The current laser power refers to the laser power currently used by the laser. In one embodiment, the current laser power can be equal to the initial laser power, which is the laser power determined by the controller based on the substrate's conveyor speed and a preset correspondence when coating the substrate surface. This correspondence includes the relationship between different substrate conveyor speeds and different laser powers. Since the coating temperature changes during the drying process using the initial laser power, the initial laser power may need to be adjusted to control the coating temperature. The adjusted laser power is then used as the current laser power. For example, if the temperature of the coating is higher than the upper limit of the preset temperature range, the controller 13 reduces the current laser power, and the reduced laser power is the laser power currently used by the laser. If the temperature of the coating is lower than the lower limit of the preset temperature range, the controller 13 can increase the current laser power, and the increased laser power is the laser power currently used by the laser.

[0092] It should be noted that current related technologies use multiple laser modules spliced ​​together to obtain a large spliced ​​light spot, which is then used to dry the coating applied by the lithium battery coating machine. However, the spliced ​​light spot has overlapping areas, and the power density in these overlapping areas may be too high, leading to a risk of localized thermal runaway and reduced safety. In this embodiment, however, a homogenized light spot is obtained by processing the laser emitted by the laser 11 using a homogenizing lens assembly, thereby reducing the risk of excessively high temperatures in localized areas and improving the safety of the laser heating process.

[0093] Furthermore, since the substrate has very low laser absorption, its temperature is determined by heat conduction after the coating heats up. Because the electrode is coated with stripes, and the coating area and the tab area are spaced apart, the substrate temperature in the coating area heats up faster than in the tab area. This results in untimely stress release in the tab area, causing the electrode to wrinkle, which affects battery safety. Therefore, in this embodiment, by controlling the laser power of the laser 11 according to the coating temperature, the coating temperature can be controlled, reducing the probability of electrode wrinkling and thus improving battery capacity and safety.

[0094] The drying apparatus provided in this embodiment uses a laser 11 to emit laser light to a homogenizing lens assembly according to the current laser power. The homogenizing lens assembly processes the laser light to obtain a homogenized spot that irradiates the coating on the substrate. A thermometer detects the temperature of the coating and sends the temperature to a controller 13. The controller 13 controls the laser power of the laser 11 according to the temperature, thereby controlling the temperature of the coating by controlling the laser power of the laser 11, reducing the probability of excessive temperature during the coating drying process, and improving the safety of the laser heating process of the coating.

[0095] In one embodiment, if the temperature difference between the target temperature and the preset temperature is within the preset temperature range, the controller 13 maintains the current laser power; if the target temperature difference is outside the preset temperature range, the controller 13 adjusts the current laser power.

[0096] In this embodiment, the preset temperature range is determined based on a preset temperature. For example, if the preset temperature is 100 degrees Celsius (°C), then if the temperature of the coating fluctuates within ±1°C of the preset temperature, the current laser power is maintained. That is, if the target temperature difference obtained by subtracting the preset temperature from the coating temperature is within [-1°C, 1°C], the current laser power is maintained.

[0097] If the target temperature difference is outside the range of [99℃, 101℃], the current laser power is adjusted. For example, if the coating temperature is 98℃, and the target temperature difference obtained by subtracting the preset temperature from this temperature equals -2℃, which is outside the range of [-1℃, 1℃], the current laser power is adjusted, increasing the current laser power of laser 11 to raise the coating temperature. If the coating temperature is 102℃, and the target temperature difference obtained by subtracting the preset temperature from this temperature equals 2℃, which is outside the range of [-1℃, 1℃], the current laser power is adjusted, decreasing the current laser power of laser 11 to lower the coating temperature, thereby reducing the possibility of the coating becoming overheated and improving the safety of the laser heating process. It should be noted that after adjusting the current laser power, the adjusted laser power is used as the current laser power. It is still necessary to determine whether the target temperature difference between the coating temperature and the preset temperature is within the preset temperature range. If it is within the preset temperature range, the current laser power is maintained; if the target temperature difference is outside the preset temperature range, the current laser power needs to be further adjusted.

[0098] To better understand the embodiments of this application, the method of adjusting the current laser power is explained here. In one possible implementation, if the target temperature difference is outside the preset temperature range, the target laser change corresponding to the target temperature difference can be determined according to the correspondence between the temperature difference and the laser power change. The sum of the target laser change and the current laser power is taken as the new laser power, and the current laser power is adjusted to the new laser power. After adjusting the laser power, the current laser power is equal to the new laser power.

[0099] For example, in this correspondence, the change in laser power when the temperature difference is -2℃ is denoted as A, where A is positive. The change in laser power when the temperature difference is 2℃ is denoted as B, where B is negative. If the target temperature difference is -2℃, the target laser power change is equal to A. The current laser power is added to A to obtain a new laser power, and the current laser power is adjusted to the new laser power, which is greater than the current laser power, thus increasing the current laser power. If the target temperature difference is 2℃, the target laser power change is equal to B. The current laser power is added to B to obtain a new laser power, and the current laser power is adjusted to the new laser power, which is less than the current laser power, thus decreasing the current laser power.

[0100] The drying apparatus provided in this embodiment maintains the current laser power when the temperature difference between the target temperature and the preset temperature is within the preset temperature range, and adjusts the current laser power when the target temperature difference is outside the preset temperature range. This achieves temperature control of the coating, reduces the possibility of the coating temperature being too high or too low, and improves the safety and heating efficiency of the laser heating process.

[0101] In one embodiment, if the target temperature difference is less than the lower limit of the preset temperature range, the controller 13 determines the first target laser power corresponding to the target temperature difference based on the correspondence between the temperature difference and the laser power, and adjusts the current laser power to the first target laser power; the first target laser power is greater than the current laser power.

[0102] In this embodiment, the controller 13 can store the correspondence between temperature difference and laser power. For example, as illustrated above, if the laser power corresponding to the temperature difference in the correspondence is C when it is equal to -2℃, and if the target temperature difference is equal to -2℃, and the target temperature difference is less than -1℃, that is, less than the lower limit of the preset temperature range, then according to the correspondence, C is taken as the first target laser power, and the current laser power is adjusted to C, where C is greater than the current laser power.

[0103] In the drying apparatus provided in this embodiment, when the target temperature difference is less than the lower limit of the preset temperature range, the controller 13 determines the first target laser power corresponding to the target temperature difference based on the correspondence between the temperature difference and the laser power, and adjusts the current laser power to the first target laser power, thereby controlling the temperature of the coating and improving the drying efficiency of the coating.

[0104] In one embodiment, if the target temperature difference is greater than the upper limit of the preset temperature range, the controller 13 determines the second target laser power corresponding to the target temperature difference based on the correspondence between the temperature difference and the laser power, and adjusts the current laser power to the second target laser power; the second target laser power is less than the current laser power.

[0105] In this embodiment, the controller 13 can store the correspondence between temperature difference and laser power. For example, referring to the example above, if the laser power corresponding to a temperature difference of 2°C is D, and the target temperature difference is 2°C, which is greater than 1°C (i.e., greater than the upper limit of the preset temperature range), then according to the correspondence, D is taken as the second target laser power, and the current laser power is adjusted to D, where D is less than the current laser power.

[0106] In the drying apparatus provided in this embodiment, when the target temperature difference is greater than the upper limit of the preset temperature range, the controller 13 determines the second target laser power corresponding to the target temperature difference based on the correspondence between the temperature difference and the laser power, and adjusts the current laser power to the second target laser power, thereby controlling the temperature of the coating, reducing the probability of excessive temperature during the coating drying process, and improving the safety of the laser heating process of the coating.

[0107] In one embodiment, when coating is applied to the surface of a substrate, the controller 13 determines the initial laser power based on the substrate's conveyor speed and a preset correspondence, and outputs the initial laser power to the laser 11; the correspondence includes the correspondence between different conveyor speeds of the substrate and different laser powers; the laser 11 is used to emit laser light to the homogenizing lens assembly based on the initial laser power.

[0108] In this embodiment, a first distance sensor and a second distance sensor can be installed at the inlet of the oven 12. The first distance sensor is positioned opposite to the first surface of the substrate, and the second distance sensor is positioned opposite to the second surface of the substrate. The first distance sensor can detect the first distance between itself and the first surface, and the second distance sensor can detect the second distance between itself and the second surface. The thickness of the substrate is obtained by subtracting the first and second distances from the total distance between the first and second distance sensors. This thickness is then sent to the controller 13, which can determine whether to coat the surface of the substrate based on the thickness. For example, if the detected thickness is within 105-505 micrometers, it is determined to start lithium battery coating. If the thickness is within 4-10 micrometers, it is determined to start gravure coating. When the controller 13 determines that the surface of the substrate will be coated, it determines the initial laser power based on the substrate's conveyor belt speed and a preset correspondence, and outputs the initial laser power to the laser 11. The laser 11 emits laser light to the homogenizing lens assembly according to the initial laser power.

[0109] Taking gravure coating as an example, after the gravure coating machine system is running, the controller 13 can control the laser 11 to activate the adjustment signal. At this time, the substrate conveyor belt passes through the oven 12 from the entrance of the oven 12, and the oven 12's air supply and exhaust are normally turned on. At this time, the laser 11 does not emit light. When gravure coating begins on the substrate surface, the controller 13 controls the corresponding laser 11 on the substrate surface to emit light. After the laser 11 emits light, the controller 13 determines the initial laser power based on the conveyor belt speed fed back by the gravure coating machine, the substrate conveyor belt speed, and the preset correspondence, and outputs the initial laser power to the laser 11, so that the laser 11 emits laser light to the uniform lens assembly according to the initial laser power. Here, the initial laser power is an analog quantity.

[0110] The drying apparatus provided in this embodiment, when coating the surface of the substrate by the controller 13, determines the initial laser power according to the substrate's conveyor speed and a preset correspondence, and outputs the initial laser power to the laser 11. The laser is then emitted to the uniform lens assembly according to the initial laser power, thereby controlling the initial laser power of the laser 11 according to the conveyor speed, so that the initial laser power of the laser 11 is within a reasonable range, thereby improving the efficiency and safety of heating the coating.

[0111] In one embodiment, as shown in FIG. 5, the drying apparatus further includes a color mark sensor 51, which is disposed at the inlet of the oven 12. The color mark sensor 51 is used to detect color information on the coating and send the color information to the controller 13. The controller 13 is used to determine whether to coat the surface of the substrate based on the color information. The color mark sensor 51 is disposed above the substrate and the color mark sensor 51 is disposed below the substrate.

[0112] In this embodiment, for gravure coating, since the conductive carbon black in the gravure coating slurry is black, a color mark sensor can be set at the inlet of the oven 12 to detect the color information on the coating and send the color information to the controller 13. The controller 13 determines whether to perform gravure coating on the surface of the substrate based on the color information.

[0113] The drying device provided in this embodiment detects the color information on the coating by setting a color mark sensor at the inlet of the oven 12 and sends the color information to the controller 13. The controller 13 then determines whether to coat the surface of the substrate, i.e. whether to perform gravure coating, based on the color information. If gravure coating is determined, the initial laser power is determined and the laser 11 is controlled to emit light according to the initial laser power to heat the coating.

[0114] In one embodiment, as shown in FIG5, the light homogenizing lens assembly includes a first light homogenizing lens assembly, which is disposed opposite to a first surface of the coating; the first light homogenizing lens assembly is used to process the laser to obtain a homogenized light spot irradiated onto the first surface of the coating.

[0115] Figure 5 shows two first homogenizing lens assemblies, located above the substrate. It should be noted that other numbers of first homogenizing lens assemblies can be used according to actual needs; this embodiment does not impose a specific limitation on the number of first homogenizing lenses. Furthermore, the position of the first homogenizing lens assemblies is not limited to the position shown in Figure 5. For example, the distance between the two first homogenizing lens assemblies can be reduced so that the edges of the two homogenized light spots processed by the two first homogenizing lens assemblies are adjacent.

[0116] The homogenized light spot obtained by processing the laser and irradiating the first surface of the coating can be as shown in Figure 6. Figure 6 is a schematic diagram of a homogenized light spot combination provided in an embodiment of this application. In Figure 6, the two homogenized light spots 61 located above the substrate are the light spots corresponding to the two first homogenizing lens assemblies in Figure 5. Specifically, the homogenized light spot on the left of the two homogenized light spots 61 corresponds to the light spot corresponding to the first homogenizing lens assembly in the upper left of Figure 5, and the homogenized light spot on the right of the two homogenized light spots 61 corresponds to the light spot corresponding to the first homogenizing lens assembly in the upper right of Figure 5.

[0117] The drying apparatus provided in this embodiment dries the first surface of the coating by setting the first homogenizing lens assembly opposite to the first surface of the coating, thereby processing the laser to obtain a homogenized light spot that irradiates the first surface of the coating.

[0118] In one embodiment, as shown in FIG5, the homogenizing lens assembly further includes a second homogenizing lens assembly, which is disposed opposite to the second surface of the coating and is used to process the laser to obtain a homogenized light spot irradiated onto the second surface of the coating.

[0119] Figure 5 shows two second homogenizing lens assemblies, located below the substrate. It should be noted that other numbers of second homogenizing lens assemblies can be used according to actual needs; this embodiment does not impose a specific limit on the number of second homogenizing lenses. Furthermore, the position of the second homogenizing lens assemblies is not limited to the position shown in Figure 5. For example, the distance between the two second homogenizing lens assemblies can be reduced so that the edges of the two homogenized light spots processed by the two second homogenizing lens assemblies are adjacent. In Figure 5, the two first homogenizing lens assemblies and the two second homogenizing lens assemblies are vertically staggered, thus forming the vertically staggered homogenizing light spots shown in Figure 6.

[0120] As shown in Figure 6, the two homogenized light spots 62 located below the substrate in Figure 6 correspond to the light spots of the two second homogenizing lens assemblies in Figure 5. Specifically, the homogenized light spot on the left of these two homogenized light spots 62 corresponds to the light spot of the second homogenizing lens assembly in the lower left of Figure 5, and the homogenized light spot on the right of these two homogenized light spots 62 corresponds to the light spot of the second homogenizing lens assembly in the lower right of Figure 5.

[0121] It should be noted that the maximum width of the substrate in existing production processes is 1400 mm, and the existing surface laser spot is generally 200*200 mm. Current related technologies typically use multiple laser modules spliced ​​together to form a large laser spot covering the width of the substrate. However, due to the non-linear decrease in the laser spot boundary, it is difficult to find a boundary power balance point that balances the power in the overlapping and non-overlapping areas. This leads to abnormal temperatures in the overlapping areas, and the consistent heating rate of the overlapping areas relative to the surrounding areas causes wrinkling of the substrate in those areas. Therefore, in this embodiment, a larger homogenizing spot is used. For example, the size of the homogenizing spot in the width direction of the substrate is 1400 mm, and the size of the homogenizing spot in the conveyor direction of the substrate is for example, 600 mm. Figure 6 shows the use of four sets of homogenizing light spots with a size of 1400 mm * 600 mm. The four sets of homogenizing light spots are staggered vertically as shown in Figure 6, so that the 1400 mm wide light spot can cover the entire width of the substrate in the width direction of the substrate; in the belt carrying direction of the substrate, the projection area of ​​the four sets of homogenizing light spots on the substrate is 600 mm, and the adjacent homogenizing light spots maintain a gap of 5-15 mm.

[0122] The drying apparatus provided in this embodiment, by setting the second uniform light lens assembly opposite to the second surface of the coating and setting the first uniform light lens assembly opposite to the first surface of the coating, achieves the processing of laser to obtain uniform light spots irradiating the first and second surfaces of the coating, and can simultaneously dry the two surfaces of the coating, further improving the drying efficiency.

[0123] In one embodiment, as shown in FIG7, FIG7 is a front view of a light-diffusing lens assembly provided in an embodiment of the present application. The light-diffusing lens assembly includes a frame, a first adjustment mechanism 71 and a light-blocking plate 72. The first adjustment mechanism 71 and the light-blocking plate 72 are connected to the frame, and the light-blocking plate is disposed toward the light-diffusing lens in the light-diffusing lens assembly.

[0124] The controller 13 is used to control the first adjustment mechanism 71 to move the light-blocking plate 72 according to the size of the substrate in the target direction, so that the size of the uniform light spot irradiated in the target direction is consistent with the length of the substrate in the target direction; the target direction is perpendicular to the belt direction of the substrate.

[0125] For example, as shown in Figure 8, which is an axial view of a homogenizing lens assembly provided in an embodiment of this application, mm represents millimeters. The length of the substrate in the target direction is 1400 mm. By controlling the first adjustment mechanism to move the light-blocking plate, the size of the homogenized light spot irradiating in the target direction is also 1400 mm, so that the size of the homogenized light spot irradiating in the target direction is consistent with the length of the substrate in the target direction. This allows all areas of the substrate in the target direction to be heated, thereby improving heating efficiency. However, if the size of the homogenized light spot in the target direction is larger than the length of the substrate in the target direction, it will cause a waste of laser resources or even a risk of leakage. Therefore, this embodiment makes the size of the homogenized light spot in the target direction consistent with the length of the substrate in the target direction, thereby improving the utilization rate of laser resources and reducing the possibility of laser leakage.

[0126] The drying apparatus provided in this embodiment controls the first adjustment mechanism to move the light-blocking plate according to the size of the substrate in the target direction by the controller 13, so that the size of the homogenized light spot irradiating in the target direction is consistent with the length of the substrate in the target direction. This enables the homogenized light spot to cover the length of the substrate in the target direction, so that all areas of the substrate in the target direction can be heated, thereby improving heating efficiency and reducing the possibility of laser leakage.

[0127] In one embodiment, the drying device further includes a displacement sensor, which is disposed on the inner side wall of the oven 12 and close to the substrate; as shown in FIG7, the light-diffusing lens assembly further includes a second adjustment mechanism 73 and a light-diffusing lens 74, which are connected to the frame.

[0128] The displacement sensor is used to detect the jitter offset in the target direction of the substrate and send the jitter offset to the controller 13;

[0129] The controller 13 is used to control the second adjustment mechanism 73 to move the homogenizing lens 74 based on the jitter offset, so that the homogenized light spot covers the substrate in the target direction of the substrate.

[0130] Figure 9 is a schematic diagram of a homogenized light spot distribution provided in an embodiment of this application. Two displacement sensors can be set in the target direction of the substrate, and each displacement sensor measures a measurement point. In Figure 9, a large white circle represents a measurement point, and Figure 9 shows the measurement points of the two displacement sensors. As shown in Figure 9, the displacement sensors can detect the jitter offset in the target direction of the substrate and send the jitter offset to the controller 13. Based on the jitter offset, the controller 13 controls the second adjustment mechanism to move the homogenizing lens, so that the homogenized light spot covers the substrate in the target direction. In Figure 9, the gray area represents the coating area, and the blank area between two adjacent gray areas represents the tab area. In addition, the area above the gray area in the first row and the area below the gray area in the third row are also tab areas, that is, the coating area and the tab area are alternately arranged, and the electrode is striped coated.

[0131] Figure 9 also shows four measurement points of the thermometer, with each small white circle representing a measurement point. Each homogenizing lens assembly corresponds to one thermometer to measure the temperature of the coating when the corresponding homogenizing lens assembly irradiates the coating with a homogenizing spot. The thermometer can be an infrared thermometer. As shown in Figure 7, the infrared thermometer 80 shown in Figure 7 can detect the temperature of the coating irradiated by the edge of the homogenizing spot. The infrared thermometer can feed back the real-time temperature to the controller 13 with a response time of less than 20 milliseconds and an accuracy of ±0.1℃, thereby improving the accuracy and efficiency of the detected coating temperature.

[0132] The drying apparatus provided in this embodiment detects the shaking offset of the substrate in the target direction using a displacement sensor and sends the shaking offset to the controller 13. Based on the shaking offset, the controller 13 controls the second adjustment mechanism to move the uniform light lens, so that the uniform light spot covers the substrate in the target direction, thereby heating each area of ​​the substrate along the target direction and improving heating efficiency.

[0133] In one embodiment, as shown in FIG7, the light-diffusing lens assembly further includes a lens protection device mounted on the frame; the lens protection device is used to isolate the light-diffusing lens in the light-diffusing lens assembly from contact with air.

[0134] The lens protection device in this embodiment may include at least one of a bellows cover 75 and an air curtain 76. The lens protection device can isolate the light-diffusing lens in the light-diffusing lens assembly from contact with air. The air curtain 76 can be connected to external compressed air to form a wind field of 1-5 m / s on the lens surface, thereby reducing the probability of slurry and other foreign matter contaminating the lens during normal production or tape breakage, reducing the probability of slurry and other foreign matter being heated to high temperatures and burning, and reducing the probability of evaporated water vapor condensing on the lens, thus protecting the lens.

[0135] The drying device provided in this embodiment isolates the uniform light lens in the uniform light lens assembly from contact with air through a lens protection device, thereby reducing the probability of the lens being contaminated by slurry and other foreign objects during normal production or tape breakage, reducing the probability of the slurry and other foreign objects being heated to high temperature and burning, and reducing the probability of evaporated water vapor condensing on the lens, thus protecting the lens.

[0136] In one embodiment, the light-diffusing lens assembly may further include a third adjustment mechanism 78, which is connected to the frame. The controller can adjust the distance between the light-diffusing lens and the substrate by controlling the third adjustment mechanism. The light-diffusing lens assembly can be fixed on a base 79, which is connected to the oven body. As shown in Figure 8, the distance between the light-diffusing lens and the substrate can be adjusted to 960 mm by controlling the third adjustment mechanism.

[0137] In one embodiment, as shown in FIG2, the drying device further includes a proximity sensor 21, which is disposed on the door frame of the access door 16 of the oven 12. The proximity sensor 21 is used to detect a target object on the access door 16 to generate a target signal and send the target signal to the controller 13. When the target signal indicates that the access door is open, the controller 13 sends a control signal to the laser 11. The control signal is used to control the laser 11 to stop emitting light. There can be multiple access doors; as shown in FIG2, four access doors are shown.

[0138] The target object can be a protruding steel sheet or other metal sheet. The proximity sensor can detect the target object on the maintenance door 16 and generate a target signal, which is then sent to the controller 13. When the target signal indicates that the maintenance door 16 is open, the controller 13 sends a control signal to the laser 11 to stop the laser from emitting light.

[0139] It should be noted that when the target signal indicates that the maintenance door is open, the controller 13 can also issue an alarm signal to prompt that the maintenance door is open.

[0140] The drying device provided in this embodiment detects a target object on the maintenance door using a proximity sensor, generates a target signal, and sends the target signal to the controller. When the target signal indicates that the maintenance door is open, the controller sends a control signal to the laser to stop emitting light, thereby reducing the risk of laser leakage.

[0141] In one embodiment, as shown in FIG5, the drying apparatus further includes a temperature sensor 52, which is disposed at a target location inside the drying oven near the substrate. The temperature sensor is used to detect the temperature at the target location, generate a temperature signal, and send the temperature signal to the controller. The controller is used to issue an alarm signal if the temperature indicated by the temperature signal is higher than a preset ambient temperature. As shown in FIG5, there are two temperature sensors 52, located above and below the substrate 15, respectively.

[0142] The preset ambient temperature is, for example, 170°C. If the temperature at the target location indicated by the temperature signal is higher than the preset ambient temperature, an alarm signal will be issued to indicate that the current ambient temperature is too high.

[0143] The drying device provided in this embodiment detects the temperature at the target location using a temperature sensor, generates a temperature signal, and sends the temperature signal to the controller. If the temperature indicated by the temperature signal is higher than the preset ambient temperature, the controller issues an alarm signal to indicate that the current ambient temperature is too high, so that relevant personnel can take measures to reduce the ambient temperature inside the drying oven based on the alarm signal.

[0144] In one embodiment, as shown in Figures 4 and 5, the drying apparatus further includes a circulating fan 41. The oven contains a return air chamber 53, an outlet air hull 54, and air nozzles 55. The return air chamber 53 and the outlet air hull 54 are connected to the oven. The return air chamber 53 is connected to the circulating fan 41 via a first pipe, and the outlet air hull 54 is connected to the circulating fan 41 via a second pipe. The circulating fan 41 is used to send air from the return air chamber 53 into the outlet air hull 54 through the second pipe. The outlet air hull 54 is used to blow air out through the air nozzles 55 to remove water vapor around the substrate. As shown in Figure 5, the return air chamber 53, the outlet air hull 54, and the air nozzles 55 are arranged above and below the substrate.

[0145] The air blown out from the nozzle 55 diffuses inside the oven. The diffused air enters the first pipe through the return air chamber 53. The circulating fan 41 can draw the diffused air inside the oven through the first pipe. As shown in Figure 3, the drying device may also include an exhaust fan 31. An opening can be made in the first pipe, and a third pipe is connected to the first pipe through the opening. The exhaust fan 31 can draw air from the first pipe through the third pipe.

[0146] The drying device provided in this embodiment can recycle the diffused air inside the oven and remove water vapor around the substrate through the recycled air, thereby improving the drying efficiency of the substrate.

[0147] In one embodiment, as shown in FIG3, the drying device further includes a filter 32, and the filter 31 is disposed in the second pipeline; the filter 32 is used to filter the air in the second pipeline and send the filtered air into the air outlet hull.

[0148] The drying device provided in this embodiment filters the air in the second pipeline and sends the filtered air into the air outlet hull, thereby improving the cleanliness of the air entering the air outlet hull and reducing the probability of dust, impurities, etc. in the air entering the air outlet hull.

[0149] In one embodiment, as shown in Figure 3, an air inlet 33 is provided on the oven body, through which air can be supplied into the oven.

[0150] In one embodiment, the oven body is provided with an observation window 17. The observation window 17 is made of special gray glass for laser protection, applicable to the wavelength range of 800-1700nm, with an optical density of 6 or higher, and is equipped with special laser protection goggles to protect personnel when observing the laser and prevent the laser from causing harm to personnel. There can be multiple observation windows 17, and Figure 1 shows a total of 4 observation windows.

[0151] In one embodiment, as shown in Figure 1, the oven is equipped with a negative pressure chamber 18. Taking the gravure coating process of battery cells as an example, during continuous gravure coating, the substrate 15 with double-sided gravure coating enters the oven 12 through the negative pressure chamber 18 at the inlet of the oven 12. The homogenizing light spot heats the coating of the substrate 15, and the water vapor in the coating evaporates and is blown away by the air nozzle. The wet film of the coating eventually becomes a dry coating, and then the substrate 15 exits the oven to continue the subsequent processes. The negative pressure chamber 18 can prevent outside air from entering the oven.

[0152] To provide an overall description of this embodiment, gravure coating is used as an example. After the gravure coating machine system starts operating, the controller activates the laser's enable modulation signal, determines whether the color mark sensor detects black, and if so, determines the initial laser power based on the belt conveyor speed. The controller then controls the laser to emit laser light according to this initial power and checks whether the temperature difference between the coating and the target temperature falls within a preset temperature range. If within the preset temperature range, the current laser power is maintained; otherwise, it is adjusted. After the enable modulation signal is activated, it checks for an alarm signal. If an alarm signal is received, the enable modulation signal is deactivated, thus stopping the laser from emitting light. If no alarm signal is received, laser data can be collected and displayed, including the current laser power and temperature.

[0153] In one embodiment, as shown in FIG10, FIG10 is a flowchart illustrating another control method provided in this application embodiment. The method is applied to the controller in the drying device in FIG1. ​​The drying device includes a laser, an oven, a controller, and a thermometer. The laser is disposed outside the oven. Both the laser and the thermometer are electrically connected to the controller. A uniform light lens assembly corresponding to the laser is disposed inside the oven. The method includes the following steps S1001-S1002:

[0154] S1001 receives the temperature of the coating on the substrate from a temperature measuring instrument.

[0155] S1002 controls the laser power of the laser based on temperature.

[0156] The temperature is measured by a thermometer when the homogenizing lens assembly irradiates the coating of the substrate with a homogenizing spot. The homogenizing spot is the spot obtained by the homogenizing lens assembly processing the laser emitted by the laser from the laser corresponding to the laser in the oven according to the current laser power.

[0157] In one embodiment, S1002, controlling the laser power of the laser based on temperature can be achieved in the following way:

[0158] If the temperature difference between the target temperature and the preset temperature is within the preset temperature range, then maintain the current laser power;

[0159] If the target temperature difference is outside the preset temperature range, adjust the current laser power.

[0160] In one embodiment, if the target temperature difference is outside the preset temperature range, the current laser power is adjusted, which can be achieved in the following way:

[0161] If the target temperature difference is less than the lower limit of the preset temperature range, the first target laser power corresponding to the target temperature difference is determined according to the correspondence between the temperature difference and the laser power.

[0162] Adjust the current laser power to the laser power of the first target; the laser power of the first target is greater than the current laser power.

[0163] In one embodiment, if the target temperature difference is outside the preset temperature range, the current laser power is adjusted, which can be achieved in the following way:

[0164] If the target temperature difference is greater than the upper limit of the preset temperature range, the second target laser power corresponding to the target temperature difference is determined according to the correspondence between the temperature difference and the laser power.

[0165] Adjust the current laser power to the second target laser power; the second target laser power is less than the current laser power.

[0166] In one embodiment, when coating is applied to the surface of a substrate, the initial laser power is determined based on the substrate's conveyor speed and a preset correspondence, and the initial laser power is output to the laser.

[0167] The correspondence includes the relationship between different substrate conveying speeds and different laser powers. The initial laser power is used to power the laser to emit laser light to the homogenizing lens assembly according to the initial laser power.

[0168] In one embodiment, the drying apparatus further includes a color mark sensor disposed at the oven inlet; the method further includes:

[0169] It receives color information of the coating on the substrate detected by the color mark sensor, and determines whether to coat the surface of the substrate based on the color information.

[0170] In one embodiment, the first adjustment mechanism is controlled to move the light-blocking plate according to the size of the substrate in the target direction, so that the size of the uniform light spot irradiated in the target direction is consistent with the length of the substrate in the target direction; the target direction is perpendicular to the conveyor direction of the substrate.

[0171] In one embodiment, the jitter offset of the substrate in the target direction detected by the displacement sensor is received and sent to the controller;

[0172] The controller is used to control the second adjustment mechanism to move the homogenizing lens in the homogenizing lens assembly based on the jitter offset, so that the homogenized light spot covers the substrate in the target direction of the substrate.

[0173] In one embodiment, a target signal generated by a target object on an access door detected by a proximity sensor is received;

[0174] When the target signal indicates that the maintenance door is open, a control signal is sent to the laser; the control signal is used to control the laser to stop emitting light.

[0175] In one embodiment, a temperature signal is generated by receiving the temperature at a target location detected by a temperature sensor; the target location is a position inside the oven near the substrate.

[0176] If the temperature indicated by the temperature signal is higher than the preset ambient temperature, an alarm signal will be issued.

[0177] It should be understood that although the steps in the flowcharts of the above embodiments are shown sequentially according to the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless explicitly stated herein, there is no strict order restriction on the execution of these steps, and they can be executed in other orders. Moreover, at least some steps in the flowcharts of the above embodiments may include multiple steps or multiple stages. These steps or stages are not necessarily completed at the same time, but can be executed at different times. The execution order of these steps or stages is not necessarily sequential, but can be performed alternately or in turn with other steps or at least some of the steps or stages of other steps.

[0178] Based on the same inventive concept, this application also provides a control device for implementing the control method described above. The solution provided by this device is similar to the solution described in the above method; therefore, specific limitations in one or more control device embodiments provided below can be found in the limitations of the control method described above, and will not be repeated here.

[0179] In one embodiment, as shown in FIG11, FIG11 is a structural block diagram of a control device provided in an embodiment of the present application. The control device 1100 is disposed in the controller of the above-mentioned drying device, and the control device 1100 includes:

[0180] The receiving module 1101 is used to receive the temperature of the coating sent by the thermometer;

[0181] The control module 1102 is used to control the laser power of the laser based on the temperature.

[0182] In one embodiment, the control module 1102 is specifically configured to maintain the current laser power if the temperature difference between the target temperature and the preset temperature is within the preset temperature range, and adjust the current laser power if the target temperature difference is outside the preset temperature range.

[0183] In one embodiment, the control module 1102 is specifically used to determine the first target laser power corresponding to the target temperature difference based on the correspondence between the temperature difference and the laser power if the target temperature difference is less than the lower limit of the preset temperature range; adjust the current laser power to the first target laser power; and make the first target laser power greater than the current laser power.

[0184] In one embodiment, the control module 1102 is specifically configured to, if the target temperature difference is greater than the upper limit of the preset temperature range, determine the second target laser power corresponding to the target temperature difference based on the correspondence between the temperature difference and the laser power; adjust the current laser power to the second target laser power; and the second target laser power is less than the current laser power.

[0185] In one embodiment, as shown in FIG12, FIG12 is a structural block diagram of another control device provided in an embodiment of the present application. The device 1200 may include:

[0186] The first determining module 1201 is used to determine the initial laser power based on the substrate's conveyor speed and a preset correspondence when coating is applied to the surface of the substrate, and to output the initial laser power to the laser.

[0187] The correspondence includes the relationship between different substrate conveying speeds and different laser powers. The initial laser power is used to power the laser to emit laser light to the homogenizing lens assembly according to the initial laser power.

[0188] In one embodiment, the drying device further includes a color mark sensor, which is disposed at the oven inlet; as shown in FIG13, FIG13 is a structural block diagram of another control device provided in an embodiment of the present application, the device 1300 may include:

[0189] The second determining module 1301 is used to receive the color information of the coating on the substrate detected by the color mark sensor, and determine whether to coat the surface of the substrate based on the color information.

[0190] In one embodiment, the control module 1102 is further configured to control the first adjustment mechanism to move the light-blocking plate according to the size of the substrate in the target direction, so that the size of the uniform light spot irradiated in the target direction is consistent with the length of the substrate in the target direction; the target direction is perpendicular to the belt direction of the substrate.

[0191] In one embodiment, the control module 1102 is further configured to receive the jitter offset of the substrate in the target direction detected by the displacement sensor and send the jitter offset to the controller; based on the jitter offset, control the second adjustment mechanism to move the homogenizing lens in the homogenizing lens assembly so that the homogenized light spot covers the substrate in the target direction.

[0192] In one embodiment, the control module 1102 is further configured to receive a target signal generated by a target object on a maintenance door detected by a proximity sensor; and send a control signal to the laser when the target signal indicates that the maintenance door is open; the control signal is used to control the laser to stop emitting light.

[0193] In one embodiment, the control module 1102 is further configured to receive a temperature signal generated by a temperature sensor detecting the temperature at a target location; the target location is a position inside the oven near the substrate; if the temperature indicated by the temperature signal is higher than a preset ambient temperature, an alarm signal is issued.

[0194] Each module in the aforementioned control device can be implemented entirely or partially through software, hardware, or a combination thereof. These modules can be embedded in the processor of a computer device in hardware form or independent of it, or stored in the memory of the computer device in software form, so that the processor can call and execute the operations corresponding to each module.

[0195] In one embodiment, a computer device is provided, which may be a terminal. The computer device includes a processor, memory, a communication interface, a display screen, and an input device connected via a system bus. The processor provides computing and control capabilities. The memory includes a non-volatile storage medium and internal memory. The non-volatile storage medium stores an operating system and computer programs. The internal memory provides an environment for the operation of the operating system and computer programs in the non-volatile storage medium. The communication interface is used for wired or wireless communication with an external terminal; wireless communication can be achieved through Wi-Fi, mobile cellular networks, NFC (Near Field Communication), or other technologies. When the computer program is executed by the processor, it implements a control method. The display screen may be an LCD screen or an e-ink display screen. The input device may be a touch layer covering the display screen, buttons, a trackball, or a touchpad mounted on the computer device casing, or an external keyboard, touchpad, or mouse.

[0196] Those skilled in the art will understand that the structure shown in Figure 14 is merely a block diagram of a portion of the structure related to the present application and does not constitute a limitation on the computer device to which the present application is applied. Specific computer devices may include more or fewer components than those shown in the figure, or may combine certain components, or may have different component arrangements.

[0197] In one embodiment, a computer device is provided, including a memory and a processor. The memory stores a computer program, and the processor executes the computer program to implement the steps of the method embodiments described above. In another embodiment, a computer-readable storage medium is provided, on which a computer program is stored, and the computer program, when executed by a processor, implements the steps of the method embodiments described above.

[0198] In one embodiment, a computer program product is provided, including a computer program that, when executed by a processor, implements the steps of the method embodiments described above.

[0199] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for analysis, data stored, data displayed, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties.

[0200] Those skilled in the art will understand that all or part of the processes in the above embodiments can be implemented by a computer program instructing related hardware. The computer program can be stored in a non-volatile computer-readable storage medium, and when executed, it can include the processes of the embodiments described above. Any references to memory, databases, or other media used in the embodiments provided in this application can include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. By way of illustration and not limitation, RAM can take many forms, such as Static Random Access Memory (SRAM) or Dynamic Random Access Memory (DRAM). The databases involved in the embodiments provided in this application may include at least one type of relational database and non-relational database. Non-relational databases may include, but are not limited to, blockchain-based distributed databases. The processors involved in the embodiments provided in this application may be general-purpose processors, central processing units, graphics processing units, digital signal processors, programmable logic devices, quantum computing-based data processing logic devices, etc., and are not limited to these.

[0201] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0202] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this application should be determined by the appended claims.

Claims

1. A drying apparatus, wherein, The drying device includes: A laser, which is disposed outside the oven, is used to emit laser light into the homogenizing lens assembly corresponding to the laser inside the oven according to the current laser power; The uniform light lens assembly is used to process the laser to obtain a uniform light spot that irradiates the coating of the substrate. A temperature measuring instrument is installed inside the oven to detect the temperature of the coating and send the temperature to the controller; The controller, which is electrically connected to the laser and the thermometer, is used to control the laser power of the laser according to the temperature.

2. The drying apparatus according to claim 1, wherein, If the temperature difference between the stated temperature and the target temperature is within the preset temperature range, the controller maintains the current laser power. If the target temperature difference is outside the preset temperature range, the controller adjusts the current laser power.

3. The drying apparatus according to claim 2, wherein, If the target temperature difference is less than the lower limit of the preset temperature range, the controller determines the first target laser power corresponding to the target temperature difference based on the correspondence between the temperature difference and the laser power, and adjusts the current laser power to the first target laser power; the first target laser power is greater than the current laser power.

4. The drying apparatus according to claim 2 or 3, wherein, If the target temperature difference is greater than the upper limit of the preset temperature range, the controller determines the second target laser power corresponding to the target temperature difference based on the correspondence between the temperature difference and the laser power, and adjusts the current laser power to the second target laser power; the second target laser power is less than the current laser power.

5. The drying apparatus according to any one of claims 1-4, wherein, When coating is applied to the surface of the substrate, the controller determines the initial laser power based on the substrate's conveyor speed and a preset correspondence, and outputs the initial laser power to the laser; the correspondence includes the relationship between different conveyor speeds of the substrate and different laser powers; The laser is used to emit laser light to the homogenizing lens assembly according to the initial laser power.

6. The drying apparatus according to claim 5, wherein, The drying device further includes: A color mark sensor is installed at the oven inlet to detect color information on the coating and send the color information to the controller. The controller is used to determine whether to coat the surface of the substrate based on the color information.

7. The drying apparatus according to any one of claims 1-6, wherein, The homogenizing lens assembly includes a first homogenizing lens assembly, which is disposed opposite to the first surface of the coating and is used to process the laser to obtain a homogenized light spot irradiated onto the first surface of the coating.

8. The drying apparatus according to claim 7, wherein, The homogenizing lens assembly further includes a second homogenizing lens assembly, which is disposed opposite to the second surface of the coating and is used to process the laser to obtain a homogenized light spot irradiated onto the second surface of the coating.

9. The drying apparatus according to any one of claims 1-8, wherein, The light-diffusing lens assembly includes a frame, a first adjustment mechanism, and a light-blocking plate. The first adjustment mechanism and the light-blocking plate are connected to the frame, and the light-blocking plate is positioned toward the light-diffusing lens in the light-diffusing lens assembly. The controller is used to control the first adjustment mechanism to move the light-blocking plate according to the size of the substrate in the target direction, so that the size of the homogenized light spot illuminating the target direction is consistent with the length of the substrate in the target direction; the target direction is perpendicular to the belt-carrying direction of the substrate.

10. The drying apparatus according to claim 9, wherein, The drying device further includes a displacement sensor, which is disposed on the inner side wall of the oven and close to the substrate; the light-diffusing lens assembly further includes a second adjustment mechanism and a light-diffusing lens, which are connected to the frame. The displacement sensor is used to detect the jitter offset in the target direction of the substrate and send the jitter offset to the controller; The controller is used to control the second adjustment mechanism to move the homogenizing lens based on the jitter offset, so that the homogenized light spot covers the substrate in the target direction of the substrate.

11. The drying apparatus according to claim 9 or 10, wherein, The light-diffusing lens assembly also includes a lens protection device, which is mounted on the frame and is used to isolate the light-diffusing lens in the light-diffusing lens assembly from contact with air.

12. The drying apparatus according to any one of claims 1-11, wherein, The drying device also includes a proximity sensor, which is installed on the door frame of the access door of the oven. The proximity sensor is used to detect the target object on the access door, generate a target signal, and send the target signal to the controller. When the target signal indicates that the maintenance door is open, the controller sends a control signal to the laser; the control signal is used to control the laser to stop emitting light.

13. The drying apparatus according to any one of claims 1-12, wherein, The drying device also includes a temperature sensor, which is located at a target position inside the oven near the substrate. The temperature sensor is used to detect the temperature at the target position, generate a temperature signal, and send the temperature signal to the controller. If the temperature indicated by the temperature signal is higher than the preset ambient temperature, the controller will issue an alarm signal.

14. The drying apparatus according to any one of claims 1-13, wherein, The drying device also includes a circulating fan, and the oven is provided with a return air chamber, an air outlet hull, and air nozzles; The return air chamber and the outlet air hull are connected to the oven. The return air chamber is connected to the circulating fan through a first pipe, and the outlet air hull is connected to the circulating fan through a second pipe. The circulating fan is used to send the air in the return air chamber into the air outlet hull through the second pipeline; The air outlet hull is used to blow air out through the air nozzle to remove water vapor around the substrate.

15. The drying apparatus according to claim 14, wherein, The drying device also includes a filter, which is disposed in the second pipeline for filtering the air in the second pipeline and sending the filtered air into the air outlet hull.

16. A control method, wherein, The control method is applied to a controller in a drying apparatus as described in any one of claims 1-15, the method comprising: Receive the temperature of the coating on the substrate sent by the temperature measuring instrument; The laser power of the laser is controlled according to the temperature. The temperature is measured by the temperature measuring instrument when the homogenizing lens assembly irradiates the coating of the substrate with a homogenizing light spot. The homogenizing light spot is the light spot obtained by the homogenizing lens assembly processing the laser emitted by the laser from the laser corresponding to the laser in the oven according to the current laser power.

17. The method according to claim 16, wherein, The step of controlling the laser power of the laser based on the temperature includes: If the temperature difference between the stated temperature and the target temperature is within the preset temperature range, then the current laser power is maintained. If the target temperature difference is outside the preset temperature range, then the current laser power is adjusted.

18. The method according to claim 17, wherein, If the target temperature difference is outside the preset temperature range, adjusting the current laser power includes: If the target temperature difference is less than the lower limit of the preset temperature range, then the first target laser power corresponding to the target temperature difference is determined according to the correspondence between the temperature difference and the laser power. The current laser power is adjusted to the first target laser power; the first target laser power is greater than the current laser power.

19. The method according to claim 17 or 18, wherein, If the target temperature difference is outside the preset temperature range, adjusting the current laser power includes: If the target temperature difference is greater than the upper limit of the preset temperature range, then the second target laser power corresponding to the target temperature difference is determined according to the correspondence between the temperature difference and the laser power. The current laser power is adjusted to the second target laser power; the second target laser power is less than the current laser power.

20. The method according to any one of claims 16-19, wherein, The method further includes: When coating is applied to the surface of the substrate, the initial laser power is determined according to the substrate's conveyor speed and a preset correspondence, and the initial laser power is output to the laser. The correspondence includes the correspondence between different conveyor speeds of the substrate and different laser powers, and the initial laser power is used to enable the laser to emit laser light to the homogenizing lens assembly according to the initial laser power.

21. The method according to claim 20, wherein, The drying device further includes a color mark sensor, which is disposed at the inlet of the oven; the method further includes: The system receives color information of the coating on the substrate detected by the color mark sensor and determines whether to coat the surface of the substrate based on the color information.

22. The method according to any one of claims 16-21, wherein, The method further includes: Based on the dimensions of the substrate in the target direction, the first adjustment mechanism is controlled to move the light-blocking plate so that the size of the homogenized light spot illuminating the target direction is consistent with the length of the substrate in the target direction; the target direction is perpendicular to the belt-carrying direction of the substrate.

23. The method according to claim 22, wherein, The method further includes: The jitter offset of the substrate in the target direction detected by the displacement sensor is received and sent to the controller. Based on the jitter offset, the second adjustment mechanism is controlled to move the homogenizing lens in the homogenizing lens assembly, so that the homogenized light spot covers the substrate in the target direction of the substrate.

24. The method according to any one of claims 16-23, wherein, The method further includes: Receives target signals generated by targets on the access door detected by proximity sensors; When the target signal indicates that the maintenance door is open, a control signal is sent to the laser; the control signal is used to control the laser to stop emitting light.

25. The method according to any one of claims 16-24, wherein, The method further includes: The system receives a temperature signal generated by a temperature sensor detecting the temperature at a target location; the target location is a position inside the oven near the substrate. If the temperature indicated by the temperature signal is higher than the preset ambient temperature, an alarm signal will be issued.

26. A control device, wherein, The control device is disposed in the controller of the drying apparatus as described in any one of claims 1-15, the control device comprising: A receiving module is used to receive the temperature of the coating sent by the thermometer; A control module is used to control the laser power of the laser based on the temperature.

27. A computer device comprising a memory and a processor, wherein the memory stores a computer program, When the processor executes the computer program, it implements the steps of the method according to any one of claims 16 to 25.

28. A computer-readable storage medium having a computer program stored thereon, wherein, When the computer program is executed by a processor, it implements the steps of the method according to any one of claims 16 to 25.

29. A computer program product comprising a computer program, wherein, When executed by a processor, the computer program implements the steps of the method according to any one of claims 16 to 25.

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