Coating control method, device, system, equipment, medium and product

Abstract

The invention discloses a coating control method, device, system and equipment, a medium and a product, and relates to the technical field of battery production and manufacturing. A first image of a first surface of a coated pole piece is obtained, and an active area (a first active area or a second active area) with the width to be adjusted is identified; and then different distance adjusting quantities (the first distance adjusting quantity or the second distance adjusting quantity) are output according to different active areas, the first coating die head is driven to accurately adjust and control the different active areas, and finally the deviation between the width of each active area and the expected width is controlled within a first preset range. Compared with a mode of uniformly adjusting the widths of all the active areas through a coating die head, the embodiment of the invention realizes targeted compensation and correction of the active areas with the widths to be adjusted, avoids the linkage problem that the active areas with the widths to be adjusted move together, does not need repeated adjustment, remarkably improves the adjustment precision and the adjustment speed, and improves the production efficiency. And meanwhile, the width stability of the active region of the non-adjusting region is ensured.

Description

Technical Field

[0001] This application relates to the field of battery manufacturing technology, and in particular to coating control methods, apparatus, systems, equipment, media, and products. Background Technology

[0002] Currently, in the production of cathode electrodes, an extrusion double-sided coating machine is mostly used to coat the cathode material onto aluminum foil, followed by drying, compaction, and slitting to form the electrode sheet.

[0003] During the coating process, the coating die is moved horizontally by cylinders at both ends to adjust the gap between the coating die and the back roller, thereby adjusting the width of the active zone formed by coating. However, this method adjusts the film width of all active zones simultaneously, making it impossible to achieve targeted adjustment. This results in abnormal widths of active zones that do not require film width adjustment, necessitating repeated adjustments, leading to poor adjustment accuracy and speed. Summary of the Invention The main objective of this application is to provide a coating control method, apparatus, system, equipment, medium, and product, which aims to improve the adjustment accuracy and adjustment speed.

[0004] To achieve the above objectives, this application proposes a coating control method applied to a controller of a coating control system. The method includes: acquiring a first image of a first surface of a coated electrode, the first surface including multiple active regions; determining an active region in the first image whose width is to be adjusted; when the active region whose width is to be adjusted includes a first active region, outputting first adjustment data for the first active region, the first adjustment data including at least a first distance adjustment amount; when the active region whose width is to be adjusted includes a second active region, outputting second adjustment data for the second active region, the second adjustment data including at least a second distance adjustment amount, and the second distance adjustment amount being different from the first distance adjustment amount, wherein the first active region and the second active region are located in different regions of the first image; controlling the operation of a first coating die head based on the first adjustment data and the second adjustment data, so that the difference between the width of the first active region and the second active region and the desired width is within a first preset range.

[0005] In this embodiment, a first image of the first surface of the coated electrode is acquired, and the active regions (first active region or second active region) whose widths need to be adjusted are identified. Then, different distance adjustment amounts (first distance adjustment amount or second distance adjustment amount) are output for different active regions, driving the first coating die to precisely control the width of each active region within a first preset range. Compared to uniformly adjusting the width of all active regions through the coating die, this embodiment achieves targeted compensation and correction for the active regions whose widths need to be adjusted, avoiding a chain reaction problem where "changing one part affects the whole," eliminating the need for repeated adjustments, significantly improving adjustment accuracy and speed, and ensuring the width stability of the non-adjustable active regions.

[0006] In one embodiment, the first surface further includes a plurality of insulating regions adjacent to the active region; the first adjustment data further includes: a first pump speed adjustment amount, the first pump speed adjustment amount being the pump speed adjustment amount of the insulating slurry delivery pump corresponding to the insulating region adjacent to the first active region; the step of determining and outputting the first adjustment data based on the first difference includes: determining the first distance adjustment amount based on the first difference; predicting a second difference between the adjusted first width of the first active region and the desired width based on the first distance adjustment amount; determining the first pump speed adjustment amount based on the second difference when the absolute value of the second difference is greater than or equal to the single minimum adjustable width value of the insulating slurry delivery pump, wherein the single minimum adjustable width value of the insulating slurry delivery pump is less than the single minimum adjustable width value of the first moving mechanism; and outputting the first distance adjustment amount and the first pump speed adjustment amount.

[0007] In this embodiment, since the insulating region and the active region are adjacent, the width change of the insulating region will also affect the width change of the active region. By adjusting the pump speed of the insulating slurry delivery pump, the width of the active region can be slightly adjusted. By combining the first distance adjustment amount for coarse adjustment of the active region width and the first pump speed adjustment amount for fine adjustment of the active region width, precise adjustment of the active region is achieved.

[0008] In one embodiment, after determining the first pump speed adjustment amount based on the second difference, and before outputting the first distance adjustment amount and the first pump speed adjustment amount, the method further includes: predicting the adjusted width of the insulation region adjacent to the first active region based on the first pump speed adjustment amount; updating the first distance adjustment amount based on the second difference if the adjusted width of the insulation region adjacent to the first active region exceeds a second preset range; predicting a third difference between the second width of the first active region after adjustment and the desired width based on the updated first distance adjustment amount; updating the first pump speed adjustment amount based on the third difference; and outputting the first distance adjustment amount and the first pump speed adjustment amount includes: outputting the updated first distance adjustment amount and the updated first pump speed adjustment amount.

[0009] In this embodiment, if it is predicted that the adjusted width of the insulating region adjacent to the first active region exceeds the second preset range, it is confirmed that the first pump speed adjustment will cause the width of the insulating region to exceed the expected width range. In this case, the first pump speed adjustment cannot be output. Instead, the first distance adjustment is updated, that is, the first moving mechanism is adjusted to move further towards the expected width (active region), and then the pump speed is adjusted in the opposite direction to output the updated first pump speed adjustment.

[0010] In one embodiment, the method further includes: acquiring the historical distance adjustment amount of the first moving mechanism during historical operation, and the corresponding historical width change amount of the first active zone; and updating the first correlation relationship based on the historical distance adjustment amount and the historical width change amount. This embodiment reduces the impact of slurry or filter element blockage on the width of the first active zone.

[0011] In one embodiment, the method further includes: obtaining the historical pump speed adjustment of the insulating slurry delivery pump corresponding to the insulating zone adjacent to the first active zone during historical operation, and the corresponding historical width change of the insulating zone; updating the second correlation based on the historical pump speed adjustment and the corresponding historical width change of the insulating zone. This embodiment reduces the impact of slurry or filter blockage on the width of the insulating zone.

[0012] In one embodiment, the coated electrode includes a first surface and a second surface, the first surface and the second surface being opposite to each other; after controlling the operation of the first coating die head based on the first adjustment data and the second adjustment data to make the difference between the width of the first active area and the width of the second active area and the desired width within a first preset range, the method further includes: obtaining the misalignment value of the two active areas whose projections overlap on the first surface and the second surface; if the misalignment value exceeds a third preset range, determining a second pump speed adjustment amount for the insulating slurry delivery pump corresponding to the insulating area adjacent to the active area of ​​the second surface based on the misalignment value; and controlling the operation of the first coating die head based on the second pump speed adjustment amount to make the misalignment value within the third preset range.

[0013] In this embodiment, since there may be misalignment between the active areas of the first and second surfaces, the pumping speed of the insulating slurry delivery pump corresponding to the insulating area adjacent to the active area of ​​the second surface is adjusted to ensure that the misalignment value of each active area of ​​the first and second surfaces is less than a third preset range, thereby avoiding problems such as short circuits in the battery after electrode assembly.

[0014] Furthermore, to achieve the above objectives, this application also proposes a coating control device, the device comprising: an acquisition module, configured to acquire a first image of a first surface of a coated electrode, the first surface including a plurality of active regions; a processing module, configured to determine an active region in the first image whose width is to be adjusted; further configured to, when the active region whose width is to be adjusted includes a first active region, output first adjustment data for the first active region, the first adjustment data including at least a first distance adjustment amount; further configured to, when the active region whose width is to be adjusted includes a second active region, output second adjustment data for the second active region, the second adjustment data including at least a second distance adjustment amount, and the second distance adjustment amount being different from the first distance adjustment amount, wherein the first active region and the second active region are located in different regions of the first image; and a control module, configured to control a first coating die head to operate based on the first adjustment data and the second adjustment data, so that the difference between the width of the first active region and the second active region and the desired width is within a first preset range.

[0015] Furthermore, to achieve the above objectives, this application also proposes a coating control system, which includes: a first coating die, a first back roller, and a controller; the first coating die is used to coat a substrate passing between the first coating die and the first back roller to form an electrode sheet including a first surface; the controller is configured to implement the steps of the coating control method as described above.

[0016] In addition, to achieve the above objectives, this application also proposes a coating control device, the device comprising: a memory, a processor, and a computer program stored in the memory and executable on the processor, the computer program being configured to implement the steps of the coating control method as described above.

[0017] In addition, to achieve the above objectives, this application also proposes a storage medium, which is a computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, it implements the steps of the coating control method described above.

[0018] In addition, to achieve the above objectives, this application also provides a computer program product, which includes a computer program that, when executed by a processor, implements the steps of the coating control method described above. Attached Figure Description

[0019] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0020] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the coating control system of this application; Figure 2 This is a schematic diagram of the specific structure of the coating dies and back rollers in the coating control system of this application. Figure 3 This is a schematic flowchart of an embodiment of the coating control method of this application; Figure 4 This is a schematic diagram of the first image after coating by the coating control system of this application. Figure 5 This is a schematic diagram of the connection structure between the first coating die and the buffer tank in the coating control system of this application. Figure 6 This is a schematic flowchart of Embodiment 2 of the coating control method of this application; Figure 7 This is a schematic flowchart of Embodiment 3 of the coating control method of this application; Figure 8 This is a schematic flowchart of Embodiment 4 of the coating control method of this application; Figure 9This is a flowchart illustrating Embodiment 5 of the coating control method of this application; Figure 10 A schematic diagram illustrating the calculation of the misalignment value between side A and side B after coating in this application; Figure 11 This is a schematic flowchart of Embodiment Six of the coating control method of this application; Figure 12 This is a schematic flowchart of Embodiment 7 of the coating control method of this application; Figure 13 This is a schematic flowchart of Embodiment 8 of the coating control method of this application; Figure 14 This is a schematic diagram of the module structure of the coating control device according to an embodiment of this application; Figure 15 This is a schematic diagram of the device structure of the hardware operating environment involved in the coating control method in the embodiments of this application.

[0022] The purpose, features, and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0023] 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.

[0024] 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.

[0025] 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.

[0026] 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.

[0027] 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.

[0028] 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).

[0029] Currently, in the production of cathode electrodes, an extrusion double-sided coating machine is mostly used to coat cathode material and insulating material onto aluminum foil, followed by drying, compaction and slitting to form the electrode sheet.

[0030] During the coating process, the coating die is moved horizontally by cylinders at both ends to adjust the gap between the coating die and the back roller, thereby adjusting the width of the active zone formed by coating to achieve the target width. However, this method adjusts the film width of all active zones simultaneously, failing to achieve targeted adjustment. This results in abnormal widths of active zones that do not require film width adjustment, necessitating repeated adjustments, leading to poor adjustment accuracy and speed.

[0031] To achieve the above objectives, this application proposes a coating control method, comprising: acquiring a first image of a first surface of a coated electrode, the first surface including a plurality of active regions; determining an active region in the first image whose width is to be adjusted; when the active region whose width is to be adjusted includes a first active region, outputting first adjustment data for the first active region, the first adjustment data including at least a first distance adjustment amount; when the active region whose width is to be adjusted includes a second active region, outputting second adjustment data for the second active region, the second adjustment data including at least a second distance adjustment amount, and the second distance adjustment amount being different from the first distance adjustment amount, wherein the first active region and the second active region are located in different regions of the first image; controlling the operation of a first coating die head based on the first adjustment data and the second adjustment data, so that the difference between the width of the first active region and the second active region and the desired width is within a first preset range.

[0032] In this embodiment, a first image of the first surface of the coated electrode is acquired, and the active regions (first active region or second active region) whose widths need to be adjusted are identified. Then, different distance adjustment amounts (first distance adjustment amount or second distance adjustment amount) are output for different active regions, driving the first coating die to precisely control the width of each active region within a first preset range. Compared to uniformly adjusting the width of all active regions through the coating die, this embodiment achieves targeted compensation and correction for the active regions whose widths need to be adjusted, avoiding a chain reaction problem where "changing one part affects the whole," eliminating the need for repeated adjustments, significantly improving adjustment accuracy and speed, and ensuring the width stability of the non-adjustable active regions.

[0033] It should be noted that the execution entity in this embodiment is the controller of the coating control system. A schematic diagram of the coating control system is shown below. Figure 1 As shown, it includes: An unwinding mechanism 1 is used to release the substrate, which is a carrier for attaching active materials, such as aluminum foil. The substrate includes a first side and a second side arranged opposite to each other. A first correction mechanism 2 is used to control the substrate to be in the middle position of the conveyor belt, and can correct the film area misalignment caused by substrate offset. A first coating die 3 and a first back roller 4 are arranged opposite to each other. The substrate, after passing through the first correction mechanism 2, is conveyed by the conveyor belt between the first coating die 3 and the first back roller 4. The first coating die 3 is used to coat the first side of the substrate with cathode material and insulating material to form multiple active areas and insulating areas adjacent to the active areas on the first side. A first drying oven 5 is conveyed by the conveyor belt into the first drying oven 5. The first drying oven 5 is used to dry the cathode material and insulating material on the first side of the substrate, thereby forming a first coating on the first side of the substrate. A first surface density detector 6 is conveyed by the conveyor belt to the first surface density detector 6, which is used to detect the material distribution density of the first coating.

[0034] The second correction mechanism 7 is used to reposition the substrate in the middle of the conveyor belt, correcting film misalignment caused by substrate shifting during transport. The second coating die 8 and the second back roller 9 are positioned opposite each other. The substrate, after passing through the second correction mechanism 7, is conveyed by the conveyor belt between the second coating die 8 and the second back roller 9. The second coating die 8 is used to coat the cathode material and insulating material on the second surface of the substrate to form multiple active areas and adjacent insulating areas. The coated substrate is conveyed by the conveyor belt into the second drying oven 10, which is used to dry the cathode material and insulating material on the second surface of the substrate, thereby forming a second coating on the second surface of the substrate. The dried substrate is conveyed by the conveyor belt to the second surface density detector 11, which is used to detect the material distribution density of the second coating. The substrate including the first and second coatings can be referred to as a film, which can be slit to form multiple electrode sheets.

[0035] A first camera 12 and a second camera 13 are positioned opposite each other. The film is conveyed between the first camera 12 and the second camera 13 by a conveyor belt. The first camera 12 is used to acquire an image of the first side, and the second camera 13 is used to acquire an image of the second side. A winding mechanism 14 is used to wind up the coated electrode sheet for use in subsequent processes.

[0036] Figure 2 The diagram shows the specific structure of the coating die and the back roller. The first coating die 3 has a first moving cylinder 31 and a second moving cylinder 32 at both ends, which can be adjusted independently. By changing the positions of the first moving cylinder 31 and the second moving cylinder 32, the distance between the first coating die 3 and the first back roller 4 can be adjusted. The distance between the first coating die 3 and the first back roller 4 mainly affects the width of the active area on the first surface of the electrode 200; the smaller the distance, the wider the active area; the larger the distance, the narrower the active area.

[0037] Correspondingly, the second coating die 8 is also equipped with a third moving cylinder 81 and a fourth moving cylinder 82 at both ends, which can be adjusted independently. By changing the positions of the third moving cylinder 81 and the fourth moving cylinder 82, the distance between the second coating die 8 and the second back roller 9 can be adjusted. The distance between the second coating die 8 and the second back roller 9 mainly affects the width of the active area on the second surface of the electrode 200; the smaller the distance, the wider the active area; the larger the distance, the narrower the active area.

[0038] The coating control method in the embodiments of this application will be described below with reference to the above-described coating control system. For example... Figure 3 As shown, the coating control method in this embodiment includes the following steps S10~S50.

[0039] In this embodiment, the first surface can be either the first or second surface of the electrode. When the first surface is the first surface, the first moving mechanism can be the first moving cylinder 31 and the second moving mechanism can be the second moving cylinder 32. When the first surface is the second surface, the first moving mechanism can be the third moving cylinder 81 and the second moving mechanism can be the fourth moving cylinder 82.

[0040] The coating control method in this embodiment will be specifically described below, taking the first surface as the first surface, the first moving mechanism as the first moving cylinder 31, and the second moving mechanism as the second moving cylinder 32.

[0041] Step S10: Obtain a first image of the first surface of the coated electrode, the first surface including multiple active regions.

[0042] The first camera 12 captures an image of the first side of the electrode, and the controller acquires the image of the first side captured by the first camera 12, thereby obtaining the first image.

[0043] It is achievable that the first image includes a first region and a second region, the first region and the second region are symmetrical about the center line of the first surface, and the number of active regions in the first region and the second region is the same; the first active region is located in the first region, the second active region is located in the second region, the first region corresponds to the first moving mechanism, and the second region corresponds to the second moving mechanism.

[0044] like Figure 4 As shown, the first image includes multiple active regions, based on the midline in the width direction of the first surface ( Figure 4 The first surface is divided into a symmetrical first region 201 and a second region 202 (shown as dashed lines), with an intermediate region 203 located between the first region 201 and the second region 202. The complete active region located in the first region 201 is called the first active region, and the complete active region located in the second region 202 is called the second active region. Figure 4 In the first image, there are five active regions. The two active regions on the left are the first active regions, the two active regions on the right are the second active regions, and the active region in the middle is neither a first nor a second active region. It is worth noting that... Figure 4 The division of the first and second regions in the first image shown is for illustrative purposes only and should not be taken as a limitation.

[0045] In this embodiment, the first moving mechanism corresponds to the first active area, and the second moving mechanism corresponds to the second active area. The width of the first active area in the first area is mainly determined by the distance between the first moving cylinder and the first back roller, and the width of the second active area in the second area is mainly determined by the distance between the second moving cylinder and the second back roller.

[0046] Step S20: Determine the active region in the first image whose width needs to be adjusted.

[0047] After obtaining the first image of the first side, the width of each active region in the first image is identified, and it is determined whether the difference between the width of each active region and the desired width is within a first preset range. If the difference is within the first preset range, no adjustment is needed; if the difference exceeds the first preset range, the active region is determined to be the active region whose width needs to be adjusted. The desired width and the first preset range can be set as needed, and this embodiment does not impose any restrictions. For example, the desired width can be 100mm, and the first preset range can be -3mm to 3mm.

[0048] Step S30: If the active region whose width to be adjusted includes the first active region, output the first adjustment data for the first active region.

[0049] When the active area whose width to be adjusted is located in the first region of the first image, that is, when the active area whose width to be adjusted is the first active area, the first adjustment data is output for the first active area. The first adjustment data includes at least a first distance adjustment amount, which is the distance adjustment amount corresponding to the first moving mechanism on the first coating die head, specifically the distance adjustment amount between the first moving mechanism and the first back roller.

[0050] Step S40: If the active region whose width to be adjusted includes the second active region, output the second adjustment data for the second active region.

[0051] When the active area whose width to be adjusted is located in the second region of the first image, that is, when the active area whose width to be adjusted is the second active area, the second adjustment data is output for the second active area. The second adjustment data includes at least a second distance adjustment amount, which is the distance adjustment amount corresponding to the second moving mechanism on the first coating die head, specifically the distance adjustment amount between the second moving mechanism and the first back roller.

[0052] In this embodiment, the first distance adjustment amount and the second distance adjustment amount are different. For example, the first distance adjustment amount is the advance of 1 tool position, while the second distance adjustment amount is the retreat of 2 tool positions. Different distance adjustment amounts can be output for different active areas (the first active area and the second active area).

[0053] Step S50: Control the operation of the first coating die head based on the first adjustment data and the second adjustment data, so that the difference between the width of the first active area and the width of the second active area and the desired width is within the first preset range.

[0054] The controller changes the distance between the first moving mechanism and the first back roller based on a first distance adjustment amount, and changes the distance between the second moving mechanism and the first back roller based on a second distance adjustment amount, so that the difference between the width of the first active area and the width of the second active area and the desired width is within a first preset range.

[0055] In this embodiment, a first image of the first surface of the coated electrode is acquired, and the active regions (first active region or second active region) whose widths need to be adjusted are identified. Then, different distance adjustment amounts (first distance adjustment amount or second distance adjustment amount) are output for different active regions, driving the first coating die to precisely control the width of each active region within a first preset range. Compared to uniformly adjusting the width of all active regions through the coating die, this embodiment achieves targeted compensation and correction for the active regions whose widths need to be adjusted, avoiding a chain reaction problem where "changing one part affects the whole," eliminating the need for repeated adjustments, significantly improving adjustment accuracy and speed, while ensuring the width stability of the active regions outside the adjustment area.

[0056] like Figure 5 As shown, the first coating die 3 includes multiple independent insulating slurry outlets. Each insulating slurry outlet forms an insulating region on the substrate adjacent to the active region. (See Figure 1) Figure 4 The first surface also includes multiple insulating regions adjacent to the active region. Each insulating slurry outlet is connected to the buffer tank 303 via an independent switch 301 and an independent insulating slurry delivery pump 302. In this embodiment, the width of the insulating region is considered to be related to the flow rate of the insulating slurry, i.e., related to the pumping speed of the insulating slurry delivery pump 302.

[0057] See Figure 4 Since the insulating region and the active region are adjacent, changes in the width of the insulating region will also affect the width of the adjacent active region. A wider insulating region will compress the adjacent active region, causing its width to decrease; conversely, a narrower insulating region provides more space for the extension of the active material, resulting in a wider adjacent active region. Therefore, in this embodiment, it is believed that adjusting the pump speed of the insulating slurry delivery pump 302 can not only adjust the width of the insulating region but also the width of the adjacent active region.

[0058] In one feasible implementation, the first adjustment data further includes: a first pump speed adjustment amount, which is the pump speed adjustment amount of the insulating slurry delivery pump corresponding to the insulating zone adjacent to the first active zone. For example... Figure 6 As shown, step S30 above includes steps S301 to S304.

[0059] Step S301: If the active region whose width to be adjusted includes the first active region, determine the first difference between the width of the first active region and the desired width.

[0060] When there are multiple first active regions, the first difference between the width of each first active region and the desired width is a weighted average of the differences between the width of each first active region and the desired width. The weight corresponding to each first active region can be determined according to the distance of the first active region from the center line of the first image; the farther the first active region is from the center line, the greater its weight; the closer the first active region is to the center line, the smaller its weight.

[0061] Of course, the same weight value can also be set for each first active region. For example, if there are two first active regions, both with a width of 99mm and a desired width of 100mm, the first difference is [(99-100) + (99-100)] / 2 = -1mm; or if the two first active regions have different widths, one of 101mm and the other of 98mm, the first difference is [(101-100) + (98-100)] / 2 = -0.5mm.

[0062] Step S302: Determine whether the absolute value of the first difference is greater than or equal to the minimum adjustable width value of the first moving mechanism in a single operation. If the determination is yes, proceed to step S303; if the determination is no, end the process.

[0063] Step S303: Determine the first distance adjustment amount based on the first difference.

[0064] It is feasible to determine the first distance adjustment amount based on the first difference and the first correlation between the distance adjustment amount of the first moving mechanism and the width change amount of the first active area.

[0065] In this embodiment, a first correlation is pre-set between the distance adjustment amount of the first moving mechanism and the width change amount of the first active area. For example, for every one tool position advanced or retracted by the first moving mechanism, the width change amount of the first active area increases or decreases by 0.5mm.

[0066] Assume the minimum adjustable width of the first moving mechanism is 0.5mm. With both first active zones having a width of 99mm and a first difference of -1mm, the absolute value of this first difference (1mm) is greater than the minimum adjustable width of the first moving mechanism (0.5mm). Based on the pre-set first correlation, it is known that the first moving mechanism needs to retract 2 tool positions, and the first distance adjustment is -2μm.

[0067] With the widths of the two first active zones differing—one being 101mm and the other 98mm—and the first difference being -0.5mm, the absolute value of this first difference (0.5mm) equals the minimum adjustable width of the first moving mechanism in a single operation (0.5mm). Based on the pre-set first correlation, it is known that the first moving mechanism needs to retract one tool position, and the first distance adjustment is -1μm.

[0068] Step S304: Based on the first distance adjustment amount, predict the second difference between the first width of the first active region after adjustment and the expected width.

[0069] After determining the first distance adjustment amount, based on the first correlation between the distance adjustment amount of the first moving mechanism and the width change amount of the first active area, the first width of the first active area after adjustment is predicted, and the second difference between the first width of the first active area after adjustment and the expected width is determined.

[0070] For example, if the width of both first active regions is 99mm and the corresponding first distance adjustment is -2mu, then according to the first correlation (for each forward or backward movement of the first moving mechanism, the width of the first active region changes by 0.5mm), it can be predicted that the width of the two first active regions will increase by 1mm after adjustment, and the width of the two first active regions will be 100mm after adjustment, and the second difference between the two and the expected width is 0.

[0071] For example, if the widths of the two first active regions are different, one being 101mm and the other 98mm, and the corresponding first distance adjustment is -1μm, then according to the first correlation (for every one forward or backward movement of the first moving mechanism, the width of the first active region changes by 0.5mm), it can be predicted that the widths of the two first active regions will increase by 0.5mm after adjustment. The widths of the two first active regions after adjustment will be 101.5mm and 98.5mm, respectively, and the second differences from the expected widths will be 1.5mm and -1.5mm, respectively.

[0072] Step S305: Determine whether the absolute value of the second difference is greater than or equal to the minimum adjustable width value of the insulating slurry delivery pump in a single operation. If the determination is yes, proceed to step S306; otherwise, return to step S10.

[0073] When there are multiple first active regions, the corresponding second difference is output for each first active region, and a judgment is made.

[0074] In this embodiment, the minimum adjustable width of the insulating slurry delivery pump is less than the minimum adjustable width of the first moving mechanism. For example, the minimum adjustable width of the first moving mechanism is 0.5 mm, and the minimum adjustable width of the insulating slurry delivery pump is 0.1 mm. Thus, the width of the active area can be coarsely adjusted by adjusting the first moving mechanism, and the width of the active area can be finely adjusted by adjusting the insulating slurry delivery pump.

[0075] Step S306: Determine the first pump speed adjustment amount based on the second difference.

[0076] It is feasible to determine the first pump speed adjustment amount based on the second difference and the pre-set correlation between the pump speed adjustment amount of the insulating slurry delivery pump corresponding to the insulating zone adjacent to the first active zone and the width change of the active zone. For example, for every 1 r / min decrease or increase in the pump speed of the insulating slurry delivery pump, the width of the active zone increases or decreases by 0.1 mm.

[0077] Continuing with the example above, the second differences between the two first active zones and the desired width are 1.5 mm and -1.5 mm, respectively. Both absolute values ​​are greater than the minimum adjustable width of the insulating slurry delivery pump (0.1 mm). Since one active zone has a second difference of 1.5 mm from the desired width, according to the pre-set correlation, the pump speed of the insulating slurry delivery pump corresponding to the adjacent insulating zone needs to be increased by 15 r / min, with the first pump speed adjustment being +15 r / min. The other active zone has a second difference of -1.5 mm from the desired width. Therefore, according to the pre-set correlation, the pump speed of the insulating slurry delivery pump corresponding to the adjacent insulating zone needs to be decreased by 15 r / min, with the first pump speed adjustment being -15 r / min.

[0078] It is worth noting that since one first active zone is adjacent to two insulating zones, the pump speeds of the insulating slurry delivery pumps corresponding to these two insulating zones work together to achieve the first pump speed adjustment. For example, if the second difference between an active zone and the desired width is 1.5, and the first pump speed adjustment is +15 r / min, then the pump speeds of the insulating slurry delivery pumps corresponding to the two adjacent insulating zones can be +7 r / min and +8 r / min, respectively.

[0079] Step S307: Output the first distance adjustment amount and the first pump speed adjustment amount.

[0080] The first distance adjustment amount and the first pump speed adjustment amount are determined and output. The width of the active zone is coarsely adjusted according to the first distance adjustment amount and finely adjusted according to the first pump speed adjustment amount. Based on these two adjustment amounts, the first moving mechanism of the first coating die and the insulating slurry delivery pump are controlled to achieve precise adjustment of the width of the active zone.

[0081] In one feasible implementation, such as Figure 6 As shown, if step S302 is incorrect, step S308 is executed: determine whether the absolute value of the first difference is greater than or equal to the minimum adjustable width value of the insulating slurry delivery pump. If yes, step S309 is executed; otherwise, return to step S10.

[0082] Since the first active area is the active area whose width is to be adjusted, and the first difference between the width of the first active area and the desired width is less than the minimum adjustable width value of the first moving mechanism in a single operation, it indicates that adjusting the width of the first active area through the first moving mechanism will cause over-adjustment. At this time, it can be determined whether the absolute value of the first difference is greater than or equal to the minimum adjustable width value of the insulating slurry delivery pump in a single operation. If it is greater, it indicates that the width of the first active area can be adjusted by adjusting the pump speed of the insulating slurry delivery pump, and step S309 is executed. If it is not greater, it indicates that adjusting the width of the first active area by adjusting the pump speed of the insulating slurry delivery pump will cause over-adjustment. At this time, no adjustment can be made first, and the process can return to step S10. Adjustment can be made after the error accumulates to a certain extent. Alternatively, the operator can be prompted to make manual adjustment.

[0083] Step S309: Determine and output the first pump speed adjustment amount based on the first difference.

[0084] For example, the widths of the two first active zones are 99.6 mm and 99.5 mm, respectively. The first difference is [(99.6-100)+99.5-100)] / 2=-0.45 mm, which is less than the minimum adjustable width value of the first moving mechanism in a single operation of 0.5 mm, but greater than the minimum adjustable width value of the insulating slurry conveying pump in a single operation of 0.1 mm. At this time, the pumping speed of the insulating slurry conveying pump corresponding to the insulating zone adjacent to the active zone can be adjusted. The first pumping speed adjustment amount can be determined according to the first difference between the width of each first active zone and the desired width.

[0085] In this design, one first active zone has a width of 99.6 mm and a corresponding first difference of -0.4 mm, resulting in a first pump speed adjustment of -4 r / min. The pump speeds of the insulating slurry delivery pumps corresponding to the two adjacent insulating zones can be -2 r / min respectively. Another first active zone has a width of 99.5 mm and a corresponding first difference of -0.5 mm, resulting in a first pump speed adjustment of -5 r / min. The pump speeds of the insulating slurry delivery pumps corresponding to the two adjacent insulating zones can be -2 r / min and -3 r / min respectively.

[0086] After determining the first pump speed adjustment amount, the insulating slurry delivery pump of the first coating die head is controlled based on the first pump speed adjustment amount, thereby realizing the adjustment of the width of the first active area.

[0087] In this embodiment, the width of the first active region is coarsely adjusted based on the first distance adjustment amount, and then finely adjusted based on the first pump speed adjustment amount, so as to achieve higher precision control.

[0088] In one feasible implementation, such as Figure 7 As shown, after step S306 and before step S307, the following steps S01 to S05 are also included.

[0089] S01, based on the first pump speed adjustment amount, predict the adjusted width of the insulation region adjacent to the first active region.

[0090] It is possible to predict the adjusted width of the insulation zone adjacent to the first active zone based on the width of the insulation zone adjacent to the first active zone, the first pump speed adjustment amount, and a second correlation between the pump speed adjustment amount of the insulation slurry delivery pump corresponding to the insulation zone adjacent to the first active zone and the width change amount of the insulation zone.

[0091] In this embodiment, a second correlation is pre-set between the pump speed adjustment of the insulating slurry delivery pump corresponding to the insulating region adjacent to the first active region and the width change of the insulating region. For example, for every 1 r / min decrease or increase in the pump speed of the insulating slurry delivery pump, the width of the insulating region decreases or increases by 0.1 mm.

[0092] For example: Assume the width of the first active zone R1 is 99.6 mm, and the pump speeds of the insulating slurry delivery pumps corresponding to the two adjacent insulating zones S1 and S2 are -2 r / min, and the widths of the two adjacent insulating zones S1 and S2 are both 9 mm. Then, when the first pump speed adjustment is -2 r / min, the width of insulating zone S1 decreases by 0.2 mm, and after adjustment, the widths of both insulating zones S1 and S2 are 8.8 mm.

[0093] Assuming the width of the first active zone R2 is 99.5 mm, and the pump speeds of the insulating slurry delivery pumps corresponding to the two adjacent insulating zones S3 and S4 are -2 r / min and -3 r / min respectively, and the widths of the two adjacent insulating zones S3 and S4 are 9 mm and 9.2 mm respectively, then when the first pump speed adjustment is -2 r / min and -3 r / min respectively, the width of insulating zone S3 decreases by 0.2 mm, and the width of insulating zone S3 after adjustment is 8.8 mm; the width of insulating zone S4 decreases by 0.3 mm, and the width of insulating zone S4 after adjustment is 8.9 mm.

[0094] S02, determine whether the adjusted width of the insulating region adjacent to the first active region exceeds the second preset range. If it does not exceed the range, proceed to step S307; if it does exceed the range, proceed to step S03.

[0095] In this embodiment, the second preset range is the expected width range of the insulation region. For example, it can be set to 9mm~10mm. If the width of the insulation region adjacent to the first active region is predicted to exceed the second preset range, it is considered that the width of the insulation region does not meet the production requirements and the width of the insulation region needs to be adjusted.

[0096] If the width of the insulation zone adjacent to the first active zone after adjustment is not predicted to exceed the second preset range, it is considered that the width of the insulation zone meets the production requirements, and the first pump speed adjustment amount can continue to be output, i.e., step S307 is executed.

[0097] Step S03: Update the first distance adjustment amount based on the second difference.

[0098] If the first pump speed adjustment causes the width of the insulation zone to exceed the expected width range, the first distance adjustment can be updated based on the second difference. Updating the first distance adjustment means adjusting the first moving mechanism to move further towards the expected width of the (active zone).

[0099] For example, continuing the above example, the adjusted widths of insulation regions S1 and S2, and insulation regions S3 and S4 all exceed the second preset range (e.g., 9mm~10mm), the width of the first active region R1 is 101mm, the width of the first active region R2 is 98mm, and the corresponding first distance adjustment amount is -1mu. When the second difference of the desired width is 1.5 and -1.5 respectively, the updated first distance adjustment amount can be 0mu.

[0100] Step S04: Based on the updated first distance adjustment, predict the third difference between the adjusted second width of the first active region and the expected width.

[0101] Based on the updated first distance adjustment amount of 0mu, the predicted second width of the first active region R1 after adjustment is 101mm, and the predicted second width of the first active region R2 after adjustment is 98mm. Therefore, the third difference between the second width of the first active region R1 after adjustment and the expected width (100mm) is 1mm, and the third difference between the second width of the first active region R2 after adjustment and the expected width (100mm) is -2mm.

[0102] Step S05: Update the first pump speed adjustment based on the third difference.

[0103] The third difference between the adjusted second width of the first active zone R1 and the desired width (100mm) is 1mm. Therefore, the width of the first active zone R1 needs to be adjusted by adjusting the width of the insulation zone. Based on this third difference of 1mm, the first pump speed adjustment corresponding to the first active zone R1 can be determined to be 10r / min. The pump speeds of the insulating slurry delivery pumps corresponding to the two adjacent insulation zones S1 and S2 are both 5r / min. Thus, after adjustment, the width of insulation zone S1 changes from 9mm to 9.5mm, and the width of insulation zone S2 changes from 9mm to 9.7mm.

[0104] The third difference between the adjusted second width of the second active zone R2 and the desired width (100mm) is -2mm. Therefore, the width of the second active zone R2 needs to be adjusted by adjusting the width of the insulation zone. Based on this third difference of -2mm, the first pump speed adjustment corresponding to the second active zone R2 can be determined to be -20r / min. Thus, the pump speeds of the insulating slurry delivery pumps corresponding to the two adjacent insulation zones S3 and S4 are both -10r / min. After this adjustment, the width of insulation zone S3 changes from 9mm to 8mm, and the width of insulation zone S4 changes from 9.2mm to 8.2mm.

[0105] As can be seen, the widths of insulating areas S3 and S4 exceed the third preset range. Step S307' can be executed first to output the updated first distance adjustment amount and the updated first pump speed adjustment amount. After controlling the coating system based on the updated first distance adjustment amount and the updated first pump speed adjustment amount, the process returns to step S10 to perform a new round of width correction.

[0106] It is worth noting that the correction of the width of the active area and the insulating area cannot be completed in one go. Instead, it is achieved through multiple rounds of correction and adjustment using the method described in this application, so that the width of each active area and the insulating area meets the requirements.

[0107] In this embodiment, the width of the insulating region is predicted to exceed the expected width range of the insulating region. If it does, the distance adjustment amount of the first moving mechanism is iteratively corrected in reverse to ensure that the widths of the active region and the insulating region meet the requirements at the same time.

[0108] In one feasible implementation, the method further includes: acquiring the historical distance adjustment amount of the first moving mechanism and the corresponding historical width change amount of the first active area during historical operation; and updating the first correlation relationship based on the historical distance adjustment amount and the historical width change amount. The first correlation relationship may be that the larger the distance adjustment amount, i.e., the larger the distance between the first moving mechanism and the first back roller, the smaller the width change amount of the first active area.

[0109] By updating the correlation between the distance adjustment amount and the width change of the first active zone based on historical data, the system can adapt to interference factors such as equipment aging and slurry viscosity changes, thereby improving long-term control stability.

[0110] In one feasible implementation, the method further includes: obtaining the historical pump speed adjustment of the insulating slurry delivery pump corresponding to the insulating zone adjacent to the first active zone during historical operation, and the historical width change of the corresponding insulating zone; updating the second correlation based on the historical pump speed adjustment and the corresponding historical width change of the insulating zone. The second correlation may be that the larger the pump speed adjustment, i.e., the higher the pump speed of the insulating slurry delivery pump, the wider the width of the insulating zone.

[0111] By updating the correlation between the pump speed adjustment and the corresponding insulation zone width change based on historical data, the system can adapt to interference factors such as equipment aging and slurry viscosity changes, thereby improving long-term control stability.

[0112] It is worth noting that the method for adjusting the width of the second active region is basically the same as the method for adjusting the width of the first active region in the above embodiments. The difference is that the first distance adjustment amount is obtained by adjusting the second moving mechanism. To avoid repetition, this embodiment will not elaborate further.

[0113] In one feasible implementation, the active area whose width is to be adjusted further includes a third active area, which is located between the first area and the second area. Since the first and second moving mechanisms of the first coating die are located at opposite ends of the first coating die, the third area located between the first and second areas cannot be adjusted by individually adjusting the distance between the first or second moving mechanism and the first back roller. Therefore, this embodiment proposes a method for adjusting the width of the third active area. Figure 8 As shown, in the above embodiment, after step S50, the following steps S60-S70 are also included.

[0114] Step S60: Output third adjustment data for the third active region. The third adjustment data includes at least the third distance adjustment amount.

[0115] The third distance adjustment amount is the adjustment amount corresponding to the first and second moving mechanisms. That is, the first and second moving mechanisms need to move together by the third distance adjustment amount.

[0116] It is feasible to output third adjustment data based on the difference between the width of the third active area and the desired width. Assuming the width of the third active area is 99mm, and the difference between it and the desired width of 100mm is 1mm, then the first and second moving mechanisms can be advanced together by 1 tool position, that is, the third distance adjustment amount is +1mu.

[0117] Step S70: Control the preset working time of the first coating die head based on the third distance adjustment amount.

[0118] In this embodiment, after controlling the third distance adjustment amount to control the first coating die head for a preset working time, the process returns to step S10 until the difference between the width of all active areas (first active area, second active area and third active area) in the first image and the desired width is within the first preset range.

[0119] In this embodiment, the width of the active area of ​​the two symmetrical regions (the first region and the second region) is adjusted first, and then the width of the active area of ​​the middle region is adjusted to avoid interference from adjusting multiple regions at the same time and reduce the adjustment complexity.

[0120] In one feasible implementation, the coated electrode includes a first side and a second side, which are opposite to each other. Since there may be misalignment between the active regions on the first and second sides, it is necessary to ensure that the misalignment value of each active region on the first and second sides is less than a third preset range, thereby avoiding problems such as short circuits in the battery after electrode assembly. Figure 9 As shown, in the above embodiment, after step S50, the following steps S80-S110 are also included.

[0121] Step S80: Obtain the misalignment values ​​of the two active areas where the projections of the first and second surfaces overlap.

[0122] like Figure 10 As shown, the first surface is surface A and the second surface is surface B. For the first active area of ​​the first region, the distance from the edge position of the first active area of ​​the first surface (surface A) and the second surface (surface B) to the edge of the first image is determined. Assuming that the distance from the edge position of the first active area of ​​the first surface (surface A) to the edge of the first image is D1 and D2, and the distance from the edge position of the first active area of ​​the second surface (surface B) to the edge of the first image is D1` and D2`, then the misalignment values ​​of the first active areas of the first surface (surface A) and the second surface (surface B) include: D1-D1`, D2-D2`.

[0123] For the second active region of the second region, determine the distance from the edge position of the second active region of the first surface (A surface) and the second surface (B surface) to the edge of the first image. Assume that the distance from the edge position of the second active region of the first surface (A surface) to the edge of the first image is D3 and D4, and the distance from the edge position of the second active region of the second surface (B surface) to the edge of the first image is D3` and D4`. Then the misalignment values ​​of the second active regions of the first surface (A surface) and the second surface (B surface) include: D3`-D3, D4`-D4.

[0124] Step S90: Determine whether the misalignment value exceeds the third preset range. If it does not exceed the range, it indicates that the misalignment values ​​of the first and second sides meet the requirements, and the process ends. If it exceeds the range, it indicates that the misalignment values ​​of the first and second sides do not meet the requirements, and steps S100 and S110 need to be executed to correct the misalignment value.

[0125] Step S100: Determine the second pump speed adjustment amount of the insulating slurry delivery pump corresponding to the insulating zone adjacent to the active zone of the second surface based on the misalignment value.

[0126] In this embodiment, when correcting the misalignment of the first surface (surface A) and the second surface (surface B), the first surface (surface A) is used as a reference, and the pumping speed of the corresponding insulating slurry delivery pump on the second surface (surface B) adjacent to the active area is adjusted to correct the misalignment of the first surface (surface A) and the second surface (surface B).

[0127] Assuming D1-D1'=0.1, D2-D2'=0.1, D3'-D3=0.2, D4'-D4=0.2, and the third preset range is -0.1 to 0.1, then the width of the fifth insulation zone S5 needs to be reduced by 0.1, and the pump speed of the insulating slurry delivery pump corresponding to the fifth insulation zone S5 needs to be reduced by 1 r / min. That is, the pump speed adjustment amount of the insulating slurry delivery pump corresponding to the fifth insulation zone S5 is -1 r / min. Similarly, the width of the sixth insulation zone S6 needs to be increased by 0.1, and the pump speed of the insulating slurry delivery pump corresponding to the sixth insulation zone S6 needs to be increased by 1 r / min. That is, the pump speed adjustment amount of the insulating slurry delivery pump corresponding to the sixth insulation zone S6 is 1 r / min. Based on this, the second pump speed adjustment amount includes (S5, -1 r / min) and (S6, 1 r / min).

[0128] Step S110: Control the operation of the first coating die head based on the second pump speed adjustment amount so that the misalignment value is within the third preset range.

[0129] The first coating die is controlled based on the second pump speed adjustment (S5, -1 r / min) and (S6, 1 r / min). After working for a period of time, the width of the fifth insulation zone S5 decreases by 0.1 mm, at which point D3`-D3=0.1; the width of the sixth insulation zone S6 increases by 0.1 mm, at which point D4`-D4=0.1. This ensures that all misalignment values ​​are within the third preset range.

[0130] In this embodiment, the projection misalignment of the A / second side active area is corrected by adjusting the pump speed corresponding to the second side insulation area, thereby solving the risk of lithium plating caused by the double-sided coating misalignment of the electrode sheets in the wound battery.

[0131] In one feasible implementation, such as Figure 11 As shown, after step S100 above, the following steps are also included: Step S001: Predict the adjusted width of the insulating region adjacent to the active region of the second surface based on the second pump speed adjustment amount.

[0132] Based on the second pump speed adjustment (S5, -1r / min) (S6, 1r / min), assuming the width of the fifth insulation zone before adjustment S5 is 9.5mm, then the width of the fifth insulation zone after adjustment S5 is 9.4mm; assuming the width of the sixth insulation zone before adjustment S6 is 9.5mm, then the width of the sixth insulation zone after adjustment S6 is 9.6mm.

[0133] Step S002: Determine whether the adjusted width of the insulating area adjacent to the active area of ​​the second surface exceeds the second preset range. If it does, proceed to step S003; if it does not, proceed to step S110 (control the operation of the first coating die head based on the second pump speed adjustment amount so that the misalignment value is within the third preset range).

[0134] In this embodiment, it is determined whether the adjusted width of the insulating area adjacent to the active area of ​​the second surface exceeds the second preset range, that is, the expected width range of the insulating area. If it exceeds the range, the adjusted width of the insulating area may not meet the requirements. In this case, step S003 is executed: an alarm is triggered to the operator. Afterwards, the operator can correct the error by manual adjustment. If the width does not exceed the range, adjustment can continue. In this case, step S110 is executed, which controls the operation of the first coating die head based on the second pump speed adjustment amount, so that the misalignment value is within the third preset range.

[0135] In this embodiment, the width of the insulation area is prevented from exceeding the second preset range during the process of correcting the misalignment of the second surface by limiting the second preset range.

[0136] In one feasible implementation, the first adjustment data further includes an active slurry pump speed adjustment amount, which is the pump speed adjustment amount of the active slurry pump that provides slurry to the first active zone; the active slurry pump speed adjustment amount is determined based on a first distance adjustment amount and a third correlation between the distance adjustment amount of the first moving mechanism and the active slurry pump speed adjustment amount, which is preset; the third correlation represents the amount of active slurry pump speed adjustment amount required to compensate for maintaining a constant areal density of the first active zone when the distance adjustment amount of the first moving mechanism changes.

[0137] In this embodiment, the first adjustment data also includes the adjustment amount of the active slurry pump speed. The first coating die includes multiple active slurry outlets, and the active slurry is supplied by an active slurry pump. Adjusting the distance between the first coating die and the first back roller changes the areal density of the active and insulating regions. For example, a smaller distance results in a thinner coating and lower areal density in the active and insulating regions; conversely, a larger distance results in a thicker coating and higher areal density. By simultaneously adjusting the active slurry pump speed during distance adjustment, a constant areal density is maintained, avoiding areal density fluctuations caused by width adjustment and ensuring the electrochemical performance of the battery.

[0138] A third correlation is pre-set between the distance adjustment amount of the first moving mechanism and the adjustment amount of the active slurry pump speed. The third correlation represents the amount of active slurry pump speed adjustment required to maintain a constant areal density of the first active zone when the distance adjustment amount of the first moving mechanism changes.

[0139] The active slurry pump speed can be adjusted by the first distance adjustment amount and the third correlation, which can compensate for the uneven surface density caused by adjusting the first distance adjustment amount of the first coating die head.

[0140] The coating control method of this application will be described in general with reference to the embodiments below.

[0141] First, taking a first surface (hereinafter referred to as surface A) comprising an odd number of active regions, including a first region and a second region, and an intermediate region between the first and second regions, with the active region in the first region being the first active region, the active region in the second region being the second active region, and the intermediate active region being the third active region as an example, the process for adjusting the width of each active region and insulating region is as follows: Figure 12 As shown, it includes the following steps: Step S1: Obtain the CCD image of side A.

[0142] Step S2: Determine the width of each active and insulating region on surface A.

[0143] Step S3: Determine whether the active regions of the first and / or second regions need adjustment. If no adjustment is needed, proceed to step S4; if adjustment is needed, proceed to step S5.

[0144] Step S4: Determine whether the width of the active area in the middle region needs adjustment. If yes, proceed to step S5; otherwise, end the process.

[0145] Step S5: Determine whether the first moving mechanism and / or the second moving mechanism need to be adjusted based on the width of each active area and the desired width. If the determination is yes, proceed to step S6; if the determination is no, proceed to step S15.

[0146] Step S6: Output the adjustment amount of the first moving mechanism and / or the second moving mechanism. This includes: simultaneous advance (the tool positions of each advancing can be the same or different), simultaneous retreat (the tool positions of each retreat can be the same or different), and one advance and one retreat.

[0147] Step S7: Predict the width of each active region after adjustment based on the pre-set first correlation.

[0148] Step S8: Determine whether the adjusted width of each active region is within the first preset range as opposed to the desired width of the active region. If yes, proceed to step S9; otherwise, proceed to step S10.

[0149] Step S9 involves feeding back the adjustment amount of the first moving mechanism and / or the second moving mechanism to the system. It is worth noting that after a preset time has elapsed since step S9 was completed, step S1 continues to be executed.

[0150] Step S10: Determine the pump speed adjustment amount of the insulating slurry delivery pump based on the predicted width of each active zone and the expected width.

[0151] Step S11: Predict whether the width of each insulation zone after adjustment exceeds the preset upper and lower limits. If not, proceed to step S12; if yes, proceed to step S13.

[0152] In step S12, the adjustment amounts of the first and / or second moving mechanisms, as well as the pump speed adjustment amount of the insulating slurry delivery pump, are fed back to the system. It is worth noting that after a preset time has elapsed since step S12 was completed, step S1 continues to be executed.

[0153] Step S13: Update the adjustment amount of the first moving mechanism and / or the second moving mechanism. This further brings the width of the adjusted active area closer to the desired width.

[0154] Step S14: Output the reverse adjustment amount of the insulating slurry delivery pump and update the pump speed adjustment amount of the insulating slurry delivery pump. It is worth noting that after executing step S14, proceed to step S12.

[0155] In step S5, if it is determined that no adjustment of the first moving mechanism and the second moving mechanism is required based on the width of each active area and the desired width, then step S15 is performed to determine the pump speed adjustment amount of the insulating slurry delivery pump based on the width of each active area and the desired width.

[0156] Step S16: Predict whether the width of each insulation zone after adjustment exceeds the preset upper and lower limits. If not, proceed to step S17; if yes, proceed to step S18.

[0157] Step S17 involves feeding back the pump speed adjustment of the insulating slurry delivery pump to the system. It is worth noting that after a preset time has elapsed since step S17 was completed, step S1 continues.

[0158] Step S18: Alarm activated.

[0159] Secondly, after adjusting the widths of the active and insulating regions on sides A and B to meet the requirements using the above-described process, the misalignment values ​​of the active regions on sides A and B can be corrected by adjusting the width of each insulating region. For example... Figure 13 As shown, it includes the following steps: Step S1: Obtain CCD data from side A and CCD data from side B.

[0160] Step S2: Calculate the misalignment value of each active area based on the CCD data of side A and side B.

[0161] Step S3: Determine if there is a misalignment anomaly based on the misalignment value of each active region. If yes, proceed to step S4; otherwise, end the process.

[0162] Step S4: Based on the abnormal misalignment value, predict whether the width of the adjusted insulation zone exceeds the second preset range. If yes, proceed to step S5 to trigger an alarm; otherwise, proceed to step S6.

[0163] Step S6: Determine the pump speed adjustment amount of the insulation slurry delivery pump for the corresponding insulation zone based on the abnormal misalignment value.

[0164] In step S7, the pump speed adjustment of the insulating slurry delivery pump is returned to the coating control system. It is worth noting that after step S7, the process returns to step S1 until the coating process is completed.

[0165] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

[0166] This application also provides a coating control device; please refer to [reference needed]. Figure 14 The coating control device includes: The acquisition module 10 is used to acquire a first image of the first surface of the coated electrode, the first surface including multiple active regions.

[0167] The processing module 20 is configured to determine the active region of the width to be adjusted in the first image; and is further configured to output first adjustment data for the first active region when the active region of the width to be adjusted includes the first active region, wherein the first adjustment data includes at least a first distance adjustment amount.

[0168] It is also used to output second adjustment data for the second active region when the active region whose width to be adjusted includes a second active region. The second adjustment data includes at least a second distance adjustment amount, and the second distance adjustment amount is different from the first distance adjustment amount, wherein the first active region and the second active region are located in different regions of the first image.

[0169] The control module 30 is used to control the operation of the first coating die head based on the first adjustment data and the second adjustment data, so that the difference between the width of the first active area and the width of the second active area and the desired width is within a first preset range.

[0170] It is worth noting that the coating control device in this embodiment can implement the coating control method in any of the above embodiments. To avoid repetition, it will not be described in detail in this embodiment.

[0171] This application also provides a coating control system, which includes: a first coating die, a first back roller, and a controller; the first coating die is used to coat a substrate passing between the first coating die and the first back roller to form an electrode including a first surface; the controller is configured to implement the steps of the coating control method as described in any of the above embodiments.

[0172] It is worth noting that the coating control system mentioned here is related to... Figure 1The coating control system shown is the same; for details, please refer to [link / reference]. Figure 1 .

[0173] This application provides a coating control device, which includes: at least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores instructions executable by the at least one processor, which are executed by the at least one processor to enable the at least one processor to perform the coating control method in any of the above embodiments.

[0174] The following is for reference. Figure 15 The diagram illustrates a structural schematic of a coating control device suitable for implementing embodiments of this application. The coating control device in the embodiments of this application may include, but is not limited to, mobile terminals such as mobile phones, laptops, digital broadcast receivers, PDAs (Personal Digital Assistants), PADs (Portable Application Description), PMPs (Portable Media Players), in-vehicle terminals (e.g., in-vehicle navigation terminals), and fixed terminals such as digital TVs and desktop computers. Figure 15 The coating control device shown is merely an example and should not be construed as limiting the functionality and scope of the embodiments of this application.

[0175] like Figure 15As shown, the coating control device may include a processing unit 1001 (e.g., a central processing unit, a graphics processing unit, etc.) that can perform various appropriate actions and processes according to a program stored in a read-only memory (ROM) 1002 or a program loaded from a storage device 1003 into a random access memory (RAM) 1004. The RAM 1004 also stores various programs and data required for the operation of the coating control device. The processing unit 1001, ROM 1002, and RAM 1004 are interconnected via a bus 1005. An input / output (I / O) interface 1006 is also connected to the bus. Typically, the following systems can be connected to the I / O interface 1006: input devices 1007 including, for example, a touchscreen, touchpad, keyboard, mouse, image sensor, microphone, accelerometer, gyroscope, etc.; output devices 1008 including, for example, a liquid crystal display (LCD), speaker, vibrator, etc.; storage devices 1003 including, for example, magnetic tape, hard disk, etc.; and communication devices 1009. Communication device 1009 allows the coating control equipment to communicate wirelessly or wiredly with other devices to exchange data. Although coating control equipment with various systems is shown in the figures, it should be understood that implementation or possession of all the systems shown is not required. More or fewer systems may be implemented alternatively.

[0176] Specifically, according to the embodiments disclosed in this application, the processes described above with reference to the flowcharts can be implemented as computer software programs. For example, embodiments disclosed in this application include a computer program product comprising a computer program carried on a computer-readable medium, the computer program containing program code for performing the methods shown in the flowcharts. In such embodiments, the computer program can be downloaded and installed from a network via a communication device, or installed from storage device 1003, or installed from ROM 1002. When the computer program is executed by processing device 1001, it performs the functions defined in the methods of the embodiments disclosed in this application.

[0177] The coating control device provided in this application has the same beneficial effects as the coating control method provided in the above embodiments, and other technical features of the coating control device are the same as those disclosed in the above embodiments, and will not be repeated here.

[0178] It should be understood that the various parts disclosed in this application can be implemented using hardware, software, firmware, or a combination thereof. In the description of the above embodiments, specific features, structures, materials, or characteristics can be combined in any suitable manner in one or more embodiments or examples.

[0179] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

[0180] This application provides a computer-readable storage medium having computer-readable program instructions (i.e., a computer program) stored thereon, the computer-readable program instructions being used to execute the coating control method in the above embodiments.

[0181] The computer-readable storage medium provided in this application may be, for example, a USB flash drive, but is not limited to, electrical, magnetic, optical, electromagnetic, infrared, or semiconductor systems, devices, or any combination thereof. More specific examples of computer-readable storage media may include, but are not limited to: electrical connections having one or more wires, portable computer disks, hard disks, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fiber, portable compact disk read-only memory (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination thereof. In this embodiment, the computer-readable storage medium may be any tangible medium containing or storing a program that can be used by or in conjunction with an instruction execution system, system, or device. The program code contained on the computer-readable storage medium may be transmitted using any suitable medium, including but not limited to: wires, optical cables, RF (Radio Frequency), etc., or any suitable combination thereof.

[0182] The aforementioned computer-readable storage medium may be included in the coating control device; or it may exist independently and not assembled into the coating control device.

[0183] The aforementioned computer-readable storage medium carries one or more programs, which, when executed by the coating control device, cause the coating control device to implement the coating control method in the above embodiments.

[0184] Computer program code for performing the operations of this application can be written in one or more programming languages ​​or a combination thereof, including object-oriented programming languages ​​such as Java, Smalltalk, and C++, and conventional procedural programming languages ​​such as the "C" language or similar programming languages. The program code can be executed entirely on the user's computer, partially on the user's computer, as a standalone software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In cases involving remote computers, the remote computer can be connected to the user's computer via any type of network—including a Local Area Network (LAN) or a Wide Area Network (WAN)—or can be connected to an external computer (e.g., via the Internet using an Internet service provider).

[0185] The flowcharts and block diagrams in the accompanying drawings illustrate the architecture, functionality, and operation of possible implementations of systems, methods, and computer program products according to various embodiments of this application. In this regard, each block in a flowchart or block diagram may represent a module, segment, or portion of code containing one or more executable instructions for implementing a specified logical function. It should also be noted that in some alternative implementations, the functions indicated in the blocks may occur in a different order than those indicated in the drawings. For example, two consecutively indicated blocks may actually be executed substantially in parallel, and they may sometimes be executed in reverse order, depending on the functions involved. It should also be noted that each block in the block diagrams and / or flowcharts, and combinations of blocks in the block diagrams and / or flowcharts, can be implemented using a dedicated hardware-based system that performs the specified function or operation, or using a combination of dedicated hardware and computer instructions.

[0186] The modules described in the embodiments of this application can be implemented in software or hardware. The names of the modules do not necessarily limit the functionality of the unit itself.

[0187] The beneficial effects of the computer-readable storage medium provided in this application are the same as those of the coating control method provided in the above embodiments, and will not be repeated here.

[0188] This application also provides a computer program product, including a computer program that, when executed by a processor, implements the steps of the coating control method described above. The beneficial effects of the computer program product provided in this application are the same as those of the coating control method provided in the above embodiments, and will not be repeated here.

[0189] The above description is only a part of the embodiments of this application and does not limit the patent scope of this application. All equivalent structural transformations made under the technical concept of this application and using the contents of the specification and drawings of this application, or direct / indirect applications in other related technical fields, are included in the patent protection scope of this application.

Claims

1. A coating control method, characterized in that, The method includes: Acquire a first image of the first surface of the coated electrode, the first surface including multiple active regions; Determine the active region in the first image whose width needs to be adjusted; When the active region whose width to be adjusted includes a first active region, first adjustment data is output for the first active region, and the first adjustment data includes at least a first distance adjustment amount; When the active region whose width to be adjusted includes a second active region, second adjustment data is output for the second active region. The second adjustment data includes at least a second distance adjustment amount, and the second distance adjustment amount is different from the first distance adjustment amount. The first active region and the second active region are located in different regions of the first image. The first coating die head is controlled to operate based on the first adjustment data and the second adjustment data, so that the difference between the width of the first active area and the width of the second active area and the desired width is within a first preset range.

2. The method as described in claim 1, characterized in that, The first distance adjustment amount is the distance adjustment amount corresponding to the first moving mechanism on the first coating die head, and the first moving mechanism corresponds to the first active area; The second distance adjustment amount is the distance adjustment amount corresponding to the second moving mechanism on the first coating die head, and the second moving mechanism corresponds to the second active area.

3. The method as described in claim 2, characterized in that, The first adjustment data is output for the first active region, including: Determine a first difference between the width of the first active region and the desired width; If the absolute value of the first difference is greater than or equal to the minimum adjustable width value of the first moving mechanism in a single operation, the first adjustment data is determined and output based on the first difference.

4. The method as described in claim 3, characterized in that, The first surface further includes multiple insulating regions, which are adjacent to the active region; the first adjustment data further includes: a first pump speed adjustment amount, which is the pump speed adjustment amount of the insulating slurry delivery pump corresponding to the insulating region adjacent to the first active region; The step of determining and outputting the first adjustment data based on the first difference includes: The first distance adjustment amount is determined based on the first difference; Based on the first distance adjustment amount, predict the second difference between the first width of the first active region after adjustment and the expected width; If the absolute value of the second difference is greater than or equal to the minimum adjustable width value of the insulating slurry conveying pump, the first pump speed adjustment amount is determined according to the second difference, wherein the minimum adjustable width value of the insulating slurry conveying pump is less than the minimum adjustable width value of the first moving mechanism. Output the first distance adjustment amount and the first pump speed adjustment amount.

5. The method as described in claim 4, characterized in that, After determining the first pump speed adjustment amount based on the second difference, and before outputting the first distance adjustment amount and the first pump speed adjustment amount, the method further includes: The width of the insulation region adjacent to the first active region after adjustment is predicted based on the first pump speed adjustment amount. If the width of the insulating region adjacent to the first active region after adjustment exceeds the second preset range, the first distance adjustment amount is updated based on the second difference; Based on the updated first distance adjustment amount, predict the third difference between the adjusted second width of the first active region and the desired width; The first pump speed adjustment amount is updated based on the third difference; The output of the first distance adjustment amount and the first pump speed adjustment amount includes: outputting the updated first distance adjustment amount and the updated first pump speed adjustment amount.

6. The method as described in claim 4, characterized in that, Determining the first distance adjustment amount based on the first difference includes: The first distance adjustment amount is determined based on the first difference and the first correlation between the distance adjustment amount of the first moving mechanism and the width change amount of the first active area, which is preset.

7. The method as described in claim 6, characterized in that, The method further includes: The historical distance adjustment of the first moving mechanism and the corresponding historical width change of the first active area are obtained during the historical operation process. The first correlation is updated based on the historical distance adjustment amount and the historical width change amount.

8. The method as described in claim 5, characterized in that, The prediction of the adjusted width of the insulation region adjacent to the first active region based on the first pump speed adjustment amount includes: Based on the width of the insulation zone adjacent to the first active zone, the first pump speed adjustment amount, and a second correlation between the pump speed adjustment amount of the insulation slurry delivery pump corresponding to the insulation zone adjacent to the first active zone and the width change of the insulation zone, the adjusted width of the insulation zone adjacent to the first active zone is predicted.

9. The method as described in claim 8, characterized in that, The method further includes: The historical pump speed adjustment of the insulating slurry delivery pump corresponding to the insulating zone adjacent to the first active zone during the historical working process is obtained, as well as the historical width change of the corresponding insulating zone. The second correlation is updated based on the historical pump speed adjustment and the corresponding historical width change of the insulation zone.

10. The method according to any one of claims 2 to 9, characterized in that, The first image includes a first region and a second region, the first region and the second region are symmetrical about the center line of the first surface, and the number of active regions in the first region and the second region are the same; The first active area is located in the first region, and the second active area is located in the second region. The first region corresponds to the first moving mechanism, and the second region corresponds to the second moving mechanism.

11. The method as described in claim 10, characterized in that, The active region whose width is to be adjusted also includes a third active region, which is located between the first region and the second region; After controlling the operation of the first coating die head based on the first adjustment data and the second adjustment data to ensure that the difference between the widths of the first active area and the second active area and the desired width is within a first preset range, the method further includes: The third adjustment data is output for the third active area, and the third adjustment data includes at least a third distance adjustment amount, which is the adjustment amount corresponding to the first moving mechanism and the second moving mechanism; After controlling the first coating die head to work for a preset time based on the third distance adjustment amount, the process returns to the step of obtaining the first image of the first surface of the coated electrode, until the difference between the width of all active areas in the first image and the desired width is within the first preset range.

12. The method according to any one of claims 2 to 9, characterized in that, The first adjustment data also includes the adjustment amount of the active slurry pump speed, which is the adjustment amount of the pump speed of the active slurry pump that provides slurry to the first active zone; The active slurry pump speed adjustment amount is determined based on the first distance adjustment amount and a third correlation between the distance adjustment amount of the first moving mechanism and the active slurry pump speed adjustment amount, which is set in advance. The third correlation represents the amount of active slurry pump speed adjustment required to maintain a constant areal density in the first active zone when the distance adjustment amount of the first moving mechanism changes.

13. The method as described in claim 1, characterized in that, The coated electrode sheet includes a first side and a second side, wherein the first side and the second side are opposite to each other. After controlling the operation of the first coating die head based on the first adjustment data and the second adjustment data to ensure that the difference between the widths of the first active area and the second active area and the desired width is within a first preset range, the method further includes: Obtain the misalignment value of the two active regions where the projections of the first and second surfaces overlap; If the misalignment value exceeds the third preset range, the second pump speed adjustment amount of the insulating slurry delivery pump corresponding to the insulating area adjacent to the active area of ​​the second surface is determined according to the misalignment value. The operation of the first coating die head is controlled based on the second pump speed adjustment, so that the misalignment value is within the third preset range.

14. The method as described in claim 13, characterized in that, After determining the second pump speed adjustment amount of the insulating slurry delivery pump corresponding to the insulating region adjacent to the active region of the second surface based on the misalignment value, the method further includes: The width of the insulation region adjacent to the active region of the second surface is predicted based on the second pump speed adjustment amount; An alarm is triggered if the adjusted width of the insulating region adjacent to the active region on the second surface exceeds a second preset range; If the width of the insulating region adjacent to the active region of the second surface after adjustment does not exceed the second preset range, then the step of controlling the operation of the first coating die head based on the second pump speed adjustment amount is performed to make the misalignment value within the third preset range.

15. A coating control device, characterized in that, The device includes: The acquisition module is used to acquire a first image of the first surface of the coated electrode, the first surface including multiple active regions; The processing module is used to determine the active region in the first image whose width needs to be adjusted; It is also used to output first adjustment data for the first active region when the active region whose width to be adjusted includes a first active region, wherein the first adjustment data includes at least a first distance adjustment amount; It is also used to output second adjustment data for the second active region when the active region whose width to be adjusted includes a second active region, the second adjustment data including at least a second distance adjustment amount, and the second distance adjustment amount is different from the first distance adjustment amount, wherein the first active region and the second active region are located in different regions of the first image; The control module is used to control the operation of the first coating die head based on the first adjustment data and the second adjustment data, so that the difference between the width of the first active area and the width of the second active area and the desired width is within a first preset range.

16. A coating control system, characterized in that, The coating control system includes: a first coating die, a first back roller, and a controller; the first coating die is used to coat a substrate passing between the first coating die and the first back roller to form an electrode sheet including a first surface. The controller is configured to implement the steps of the coating control method as described in any one of claims 1 to 14.

17. A coating control device, characterized in that, The coating control device includes: a memory, a processor, and a computer program stored in the memory and executable on the processor, the computer program being configured to implement the steps of the coating control method as described in any one of claims 1 to 14.

18. A storage medium, characterized in that, The storage medium is a computer-readable storage medium, and a computer program is stored on the storage medium. When the computer program is executed by a processor, it implements the steps of the coating control method as described in any one of claims 1 to 14.

19. A computer program product, characterized in that, The computer program product includes a computer program that, when executed by a processor, implements the steps of the coating control method as described in any one of claims 1 to 14.

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