Coating size correction method, device, equipment, storage medium and program product

Abstract

This application provides a coating size correction method, apparatus, device, storage medium, and program product. The method includes: acquiring a first wet coating width and a first dry coating width of a first coating area on an electrode; calculating a first deviation between the first dry coating width and a preset coating width, and a second deviation between the first wet coating width and the first dry coating width; and determining a first correction amount based on the first deviation and the second deviation. This application improves the efficiency and accuracy of coating size correction by acquiring the first wet coating width and the first dry coating width at the same location, combined with the preset coating width, to determine the first correction amount to be corrected.

Description

Technical Field

[0001] This application relates to the field of battery manufacturing technology, and more specifically, to a coating size correction method, apparatus, equipment, storage medium, and program product. Background Technology

[0002] Coating is one of the steps in battery manufacturing. It involves uniformly applying the slurry prepared in the previous step to the current collector (such as aluminum foil or copper foil) to a specified thickness and then drying the solvent.

[0003] In the battery coating production workshop, controlling and adjusting the coating size is one of the most important steps to ensure product quality. Inaccurate coating size control will affect the battery's safety performance. Currently, the coating production process mainly relies on manual measurement of the dry coating size to determine whether it meets the requirements. This correction method has low accuracy and efficiency. Summary of the Invention

[0004] The purpose of this application is to provide a coating size correction method, apparatus, device, storage medium, and program product to improve the efficiency and accuracy of coating size correction.

[0005] In a first aspect, embodiments of this application provide a coating size correction method, comprising: a correction device acquiring a first wet coating width and a first dry coating width of a first coating area on an electrode; calculating a first deviation between the first dry coating width and a preset coating width, and a second deviation between the first wet coating width and the first dry coating width; and determining a first correction amount based on the first deviation and the second deviation.

[0006] The embodiments of this application use the first wet coating width and the first dry coating width collected by the correction device, combined with the preset coating width, to determine the first correction amount that needs to be corrected, thereby improving the efficiency and accuracy of coating size correction.

[0007] In any embodiment, if the first dry coating width does not meet the preset requirement, a first deviation between the first dry coating width and the preset coating width, and a second deviation between the first wet coating width and the first dry coating width are obtained.

[0008] The embodiments of this application reduce the amount of computation by first determining whether the first dry coating width meets the preset requirements before calculating the first deviation and the second deviation. If the preset requirements are not met, the first deviation and the second deviation are then calculated.

[0009] In any embodiment, the first correction amount can be calculated by the following steps:

[0010] If the first deviation indicates that the first dry coating width is greater than the preset coating width, and the second deviation indicates that the first wet coating width is greater than the first dry coating width, then the first correction amount is determined according to the first deviation.

[0011] If the first deviation indicates that the first dry coating width is greater than the preset coating width, and the second deviation indicates that the first wet coating width is less than the first dry coating width, then the first correction amount is determined based on the absolute value of the first deviation and the absolute value of the second deviation.

[0012] In this embodiment, the first dry coating width is determined by comparing it with the preset coating width. The coating elasticity is determined by comparing the first wet coating width with the first dry coating width. Based on the above results, the first correction amount can be accurately determined.

[0013] In any embodiment, if the first deviation indicates that the first dry coating width is less than the preset coating width, and the second deviation indicates that the first wet coating width is less than the first dry coating width, then the first correction amount is determined according to the first deviation.

[0014] If the first deviation indicates that the first dry coating width is less than the preset coating width, and the second deviation indicates that the first wet coating width is greater than the first dry coating width, then the first correction amount is determined based on the absolute value of the first deviation and the absolute value of the second deviation.

[0015] In this embodiment, the first dry coating width is determined by comparing it with the preset coating width. The coating elasticity is determined by comparing the first wet coating width with the first dry coating width. Based on the above results, the first correction amount can be accurately determined.

[0016] In any embodiment, determining the first correction amount based on the absolute value of the first deviation and the absolute value of the second deviation includes:

[0017] If the difference between the absolute value of the first deviation and the absolute value of the second deviation is greater than zero, then the first correction amount is determined based on the first deviation.

[0018] If the difference between the absolute value of the first deviation and the absolute value of the second deviation is less than zero, then the first correction amount is determined based on the second deviation.

[0019] This application embodiment determines the main factors causing the first dry coating width to fail to meet requirements by calculating the magnitude between the absolute value of the first deviation and the absolute value of the second deviation, and determines the first correction amount based on the main factors, thereby improving the accuracy of the calculation of the first correction amount.

[0020] In any embodiment, after determining the first correction amount, the method further includes: if the first dry coating width is greater than the preset coating width, then controlling the spraying device to move away from the electrode along the electrode thickness direction based on the first correction amount; if the first dry coating width is less than the preset coating width, then controlling the spraying device to move closer to the electrode along the electrode thickness direction based on the first correction amount.

[0021] This application embodiment improves the efficiency and accuracy of coating size adjustment by determining the size of the first dry coating width and the preset coating width, and adjusting the position of the spraying device accordingly.

[0022] In any embodiment, acquiring the first wet coating width and the first dry coating width of the first coating area on the electrode includes: acquiring the first wet coating image and the first dry coating image of the first coating area on the electrode using an image acquisition device; and determining the first wet coating width corresponding to the first wet coating image and the first dry coating width corresponding to the first dry coating image based on the device parameters of the image acquisition device.

[0023] The embodiments of this application utilize visual technology to efficiently and accurately determine the first wet coating width and the first dry coating width.

[0024] In any embodiment, acquiring the first wet coating width and the first dry coating width of the first coating area on the electrode includes: acquiring the first wet coating of the first coating area of ​​the first preset length on the electrode, and taking the average width of the first wet coating of the first preset length as the first wet coating width; acquiring the first dry coating of the second preset length, and taking the average width of the first dry coating of the second preset length as the first dry coating width.

[0025] The embodiments of this application use the average value of a coating area to more accurately reflect the first wet coating width and the first dry coating width.

[0026] In any embodiment, the method further includes: acquiring a second wet coating width and a second dry coating width of the second coating area on the electrode; wherein the second coating area and the first coating area are arranged in parallel along the length direction of the electrode; if the second dry coating width does not meet the preset width requirement, then calculating a third deviation between the second dry coating width and the preset coating width, and a fourth deviation between the first wet coating width and the first dry coating width; and determining a second correction amount based on the third deviation and the fourth deviation.

[0027] The embodiments of this application can be applied to a one-to-two coating process, and simultaneously achieve dimensional correction of the first coating area and the second coating area, thereby improving the efficiency of correction.

[0028] In any embodiment, determining the second correction amount based on the third deviation and the fourth deviation includes:

[0029] If the third deviation indicates that the second dry coating width is greater than the preset coating width, and the fourth deviation indicates that the second wet coating width is greater than the second dry coating width, then the second correction amount is determined according to the third deviation.

[0030] If the third deviation indicates that the second dry coating width is greater than the preset coating width, and the fourth deviation indicates that the second wet coating width is less than the second dry coating width, then the second correction amount is determined based on the absolute values ​​of the third deviation and the fourth deviation.

[0031] In this embodiment, the second dry coating width is determined by comparing it with the preset coating width. The elasticity of the coating is determined by the second wet coating width and the second dry coating width. Based on the above results, the second correction amount can be accurately determined.

[0032] In any embodiment, determining the second correction amount based on the third deviation and the fourth deviation includes:

[0033] If the third deviation indicates that the second dry coating width is less than the preset coating width, and the fourth deviation indicates that the second wet coating width is less than the second dry coating width, then the second correction amount is determined according to the third deviation.

[0034] If the third deviation indicates that the second dry coating width is less than the preset coating width, and the fourth deviation indicates that the first wet coating width is greater than the second dry coating width, then the second correction amount is determined based on the absolute value of the third deviation and the absolute value of the fourth deviation.

[0035] In this embodiment, the second dry coating width is determined by comparing it with the preset coating width. The coating elasticity is determined by the first wet coating width and the second dry coating width. Based on the above results, the second correction amount can be accurately determined.

[0036] In any embodiment, determining the second correction amount based on the absolute value of the third deviation and the absolute value of the fourth deviation includes:

[0037] If the difference between the absolute value of the third deviation and the absolute value of the fourth deviation is greater than zero, then the second correction amount is determined based on the third deviation.

[0038] If the difference between the absolute values ​​of the third deviation and the fourth deviation is less than zero, then the second correction amount is determined based on the fourth deviation.

[0039] This application embodiment determines the main factors causing the second dry coating width to fail to meet requirements by calculating the magnitude between the absolute values ​​of the third deviation and the fourth deviation, and determines the second correction amount based on the main factors, thereby improving the accuracy of the second correction amount calculation.

[0040] In any embodiment, after obtaining the first correction amount and the second correction amount, the method further includes:

[0041] The first end of the spraying device is controlled to move along the electrode thickness direction according to the first deviation and the first correction amount; and the second end of the spraying device is controlled to move along the electrode thickness direction according to the third deviation and the second correction amount; wherein the first end is the end of the spraying device opposite to the first coating area, and the second end is the end of the spraying device opposite to the second coating area.

[0042] The embodiments of this application can adjust the advance and retraction of the two ends of the spraying device according to the first correction amount and the second correction amount, thereby realizing the adjustment of the size of a single coating area of ​​multiple coating areas in the electrode.

[0043] In any embodiment, acquiring the second wet coating width and the second dry coating width of the second coating area on the electrode includes: acquiring a second wet coating image and a second dry coating image of the second coating area on the electrode using an image acquisition device; and determining the second wet coating width corresponding to the second wet coating image and the second dry coating width corresponding to the second dry coating image based on the device parameters of the image acquisition device.

[0044] The embodiments of this application utilize visual technology to efficiently and accurately determine the second wet coating width and the second dry coating width.

[0045] In any embodiment, acquiring the second wet coating width and the second dry coating width of the second coating area on the electrode includes: acquiring a second wet coating of a third preset length on the second coating area of ​​the electrode, and taking the average width of the second wet coating of the third preset length as the second wet coating width; acquiring a second dry coating of a fourth preset length, and taking the average width of the second dry coating of the fourth preset length as the second dry coating width.

[0046] The embodiments of this application use the average value of a coating area to more accurately reflect the second wet coating width and the second dry coating width.

[0047] Secondly, embodiments of this application provide a coating size correction device, comprising: a width acquisition module, a deviation calculation module, a deviation calculation module, and a correction module; wherein:

[0048] The width acquisition module is used to collect the first wet coating width and the first dry coating width of the first coating area on the electrode; the deviation calculation module is used to calculate the first deviation between the first dry coating width and the preset coating width, and the second deviation between the first wet coating width and the first dry coating width; the correction module determines the first correction amount based on the first deviation and the second deviation.

[0049] Thirdly, embodiments of this application provide an electronic device, including: a processor, a memory, and a bus, wherein the processor and the memory communicate with each other via the bus; the memory stores program instructions that can be executed by the processor, and the processor can execute the method of the first aspect by calling the program instructions.

[0050] Fourthly, embodiments of this application provide a non-transitory computer-readable storage medium, comprising: the non-transitory computer-readable storage medium storing computer instructions, the computer instructions causing a computer to perform the method of the first aspect.

[0051] Fifthly, embodiments of this application provide a coating size correction system, comprising: an image acquisition device and a coating size correction device; wherein:

[0052] The image acquisition device is communicatively connected to the coating size correction device, and is used to acquire image data of the electrode sheet after the coating equipment coats it, and send the image data to the coating size correction device; the coating size correction device is used to execute the method described in the first aspect based on the image data.

[0053] Based on the above embodiments, the image acquisition device includes a first image acquisition unit, a second image acquisition unit, a third image acquisition unit, and a fourth image acquisition unit; the first image acquisition unit is disposed on the first side of the oven in the coating equipment and faces the first surface of the electrode sheet, and is used to acquire a wet coating image of the first surface; the second image acquisition unit is disposed on the second side of the oven and faces the first surface of the electrode sheet, and is used to acquire a dry coating image of the first surface; the third image acquisition unit is disposed on the second side of the oven in the coating equipment and faces the second surface of the electrode sheet, and is used to acquire a wet coating image of the second surface; the fourth image acquisition unit is disposed on the first side of the oven and faces the second surface of the electrode sheet, and is used to acquire a dry coating image of the second surface.

[0054] Other features and advantages of this application will be set forth in the following description and will be apparent in part from the description or may be learned by practicing embodiments of this application. The objectives and other advantages of this application may be realized and obtained by means of the structures particularly pointed out in the written description, claims, and drawings. Attached Figure Description

[0055] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments of this application will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0056] Figure 1 This is a schematic flowchart of a coating size correction method provided in an embodiment of this application;

[0057] Figure 2 A schematic diagram of an electrode sheet including a coating area is provided for an embodiment of this application;

[0058] Figure 3 This is a schematic diagram of the coating machine measurement and pressure head control system provided in an embodiment of this application;

[0059] Figure 4 This is a schematic diagram of a 1-out-2 equal-width film electrode provided in an embodiment of this application;

[0060] Figure 5 A schematic diagram of another coating size correction method provided in this application embodiment;

[0061] Figure 6 This is a schematic diagram of a coating size correction device provided in an embodiment of this application;

[0062] Figure 7 This is a schematic diagram of the physical structure of an electronic device provided in an embodiment of this application;

[0063] Figure 8 This is a schematic diagram of a coating size correction system provided in an embodiment of this application;

[0064] Figure 9 This is a schematic diagram illustrating the working principle of the coating size correction system provided in the embodiments of this application. Detailed Implementation

[0065] 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.

[0066] 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.

[0067] 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.

[0068] 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.

[0069] 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.

[0070] 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).

[0071] In the description of the embodiments of this application, the technical terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0072] In the description of the embodiments of this application, unless otherwise expressly specified and limited, the technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application based on the specific circumstances.

[0073] Slurry coating is the next step after slurry preparation. Its main purpose is to uniformly coat the positive and negative electrode current collectors (also known as electrode substrates) with a slurry that has good stability, viscosity, and flowability. Electrode coating is of great significance to lithium-ion batteries, primarily in the following aspects:

[0074] 1. It is of great significance to the capacity of the finished battery. If the coating thickness of the positive and negative electrode slurry is inconsistent in the three sections of the electrode sheet (front, middle, and rear), it can easily lead to the battery capacity being too low or too high, and it is also more likely to form lithium plating during battery cycling, affecting battery life.

[0075] 2. It is of great significance to battery safety. Before coating, the 5S process must be performed to ensure that no particles, debris, dust, etc. are mixed into the electrode during the coating process. If debris is mixed in, it will cause micro-short circuits inside the battery, and in severe cases, it will lead to battery fire and explosion.

[0076] 3. It is of great significance for the consistency of battery performance. Battery manufacturers are particularly concerned about large differences in capacity and cycle life within a batch of batteries. Therefore, it is essential to ensure that the parameters of the electrodes are consistent before and after coating.

[0077] 4. It is of great significance to battery life. Large differences before and after slurry coating, dust mixed into the electrode, uneven thickness of the electrode on both sides, etc., all affect the quality of battery electrochemical performance.

[0078] Extrusion coating is a type of coating. Its working principle is that the feeding system delivers the coating material to the screw pump, and then the slurry is powered to the extrusion head. The slurry is made into a liquid film through extrusion and then coated onto a moving current collector. After drying, a uniform coating is formed.

[0079] Currently, controlling and adjusting the coating size is one of the most crucial steps in ensuring product quality during the coating process. For lithium batteries, inaccurate coating size control can lead to lithium plating, affecting battery safety. To ensure the coating size meets requirements, the dry coating size can be manually measured and compared with a preset size to determine if it meets the requirements. If not, the spraying equipment needs to be manually adjusted to regulate the wet coating size, thereby regulating the dry coating size. It's important to understand that both dry and wet coating sizes refer to the dimensions of the coating area on the electrode substrate in the width direction.

[0080] The inventors have noticed that the size of the dry coating area generated after drying varies depending on the material of the slurry. Specifically, the size of the dry coating area may be larger or smaller than the size before drying. Manually adjusting the spraying device based solely on the deviation between the measured dry coating size and the preset coating size leads to inaccurate adjustments.

[0081] To solve the above-mentioned technical problems, the inventors proposed a coating size correction method, apparatus, equipment, storage medium and program product, which collects the first wet coating width and the first dry coating width, calculates the first deviation between the first dry coating width and the preset coating width, and calculates the second deviation between the first wet coating width and the first dry coating width, and determines the first correction amount based on the first deviation and the second deviation.

[0082] By comprehensively considering the dimensional changes of the first coating area from a wet state to a dry state, as well as the first dry coating width and the preset coating width, the first correction amount is determined, which can improve the accuracy of the determination of the first correction amount.

[0083] The coating size correction method provided in this application is not only applicable to the correction of coating size in the coating process of lithium battery manufacturing, but also applicable to the correction of coating size in other types of batteries that include a coating process.

[0084] Figure 1 This is a schematic flowchart of a coating size correction method provided in an embodiment of this application, as shown below. Figure 1 As shown, the coating size correction method provided in this application embodiment can be applied to electronic devices, which include a terminal and a server; wherein the terminal can specifically be a smartphone, tablet computer, computer, personal digital assistant (PDA), etc.; the server can specifically be an application server or a web server.

[0085] The method includes the following steps:

[0086] Step 101: Collect the first wet coating width and the first dry coating width of the first coating area on the electrode sheet;

[0087] Step 102: Calculate the first deviation between the first dry coating width and the preset coating width, and calculate the second deviation between the first wet coating width and the first dry coating width;

[0088] Step 103: Determine the first correction amount based on the first deviation and the second deviation.

[0089] In step 101, the electrode includes a cathode electrode and an anode electrode; the cathode electrode is formed by combining a cathode active material with a current collector; the anode electrode is formed by combining an anode active material with a current collector. Specifically, the cathode active material or the anode active material is coated onto the current collector to form the corresponding cathode electrode or anode electrode. The first coating area refers to the area formed after the cathode active material or the anode active material is coated onto the current collector. Figure 2As shown, the black area represents the first coating area, and W1 represents the coating width of the first coating area. It can be understood that if the first coating area is a first wet coating area, then W1 is used to characterize the first wet coating width; if the first coating area is a first dry coating area, then W1 is used to characterize the first dry coating width. Therefore, the first wet coating width and the first dry coating width refer to the width of the coating area in the width direction of the electrode substrate. It can be understood that the first wet coating width and the first dry coating width can be obtained through visual technology or other methods; this application embodiment does not specifically limit this method.

[0090] The first wet coating width and the first dry coating width can be the width of the same location in the first coating area. Here, "same location" can be understood as the same area within the first coating area. For example, if the first wet coating width is the average width of the area between the 1st and 2nd meters along the length of the first coating area, then the first dry coating width is also the average width of the area between the 1st and 2nd meters along the first coating area. It is understood that the purpose of limiting the first wet coating width and the first dry coating width at the same location in this embodiment is to allow for the calculation of the width change of the same area after it changes from a wet to a dry state in subsequent steps. Of course, the first coating area corresponding to the first wet coating width and the first dry coating width can have some deviation and is not necessarily strictly the same location. For example, if the first wet coating width is the average width of the area between the 1st and 2nd meters along the length of the first coating area, then the first dry coating width is also the average width of the area between the 0.9th and 1.9th meters along the first coating area. In addition, the first wet coating width and the first dry coating width can also represent the width corresponding to a certain point on the first coating area. For example, the first wet coating width and the first dry coating width can be the width at the 1st meter of the first coating area. Or, the first wet coating width can be the width of the first coating area at the 1st meter before drying, and the first dry coating width can be the width of the first coating area at the 1.1st meter after drying.

[0091] It is understood that electronic devices can acquire the first wet coating width and the first dry coating width through their own coating size measuring device, or they can receive the first wet coating width and the first dry coating width sent by an external coating size measuring device. This application does not make any specific limitations on this.

[0092] In step 102, the required coating dimensions differ for different battery models. Therefore, the preset width requirement is pre-set based on the actual coating process. The purpose of this embodiment is to produce a coating dimension that meets the process requirements. The optimal result is that the first dry coating width is equal to the preset coating width. However, due to factors such as machine errors, environmental influences, or coating materials during the coating process, there may be a deviation between the first dry coating width and the preset coating width. Therefore, after acquiring the first dry coating width, the electronic device calculates a first deviation between the first dry coating width and the preset coating width, and also calculates a second deviation between the first coating width and the first dry coating width. The first deviation can be obtained by subtracting the preset coating width from the first dry coating width, or by subtracting the first dry coating width from the preset coating width. The second deviation can be obtained by subtracting the first dry coating width from the first wet coating width, or by subtracting the first wet coating width from the first dry coating width. It should be noted that the specific methods for obtaining the first deviation and the second deviation will affect subsequent steps. In this embodiment, the first deviation is obtained by subtracting the preset coating width from the first dry coating width, and the second deviation is obtained by subtracting the first dry coating width from the first wet coating width.

[0093] In step 103, the first correction amount characterizes the amount by which the position of the spraying device is adjusted. This can be either the specific distance the spraying device needs to be adjusted along the electrode thickness direction, or the number of adjustments required. It is understood that the distance the spraying device adjusts along the electrode thickness direction is fixed for each adjustment; therefore, the number of adjustments is positively correlated with the distance the spraying device moves along the electrode thickness direction. After obtaining the first deviation and the second deviation, the electronic device can determine the first correction amount required to adjust the position of the spraying device based on these deviations.

[0094] The embodiments of this application use the first wet coating width and the first dry coating width collected by the correction device, combined with the preset coating width, to determine the first correction amount that needs to be corrected, thereby improving the efficiency and accuracy of coating size correction.

[0095] Based on the above embodiments, before calculating the first deviation and the second deviation, it can be determined whether the first dry coating width meets the preset requirements. If it does not meet the preset requirements, it means that the first wet coating width needs to be adjusted. At this time, the first deviation between the first dry coating width and the preset coating width is calculated, and the second deviation between the first wet coating width and the first dry coating width is calculated.

[0096] In specific implementation processes, a small deviation between the first dry coating width and the preset coating width is permissible in actual production processes. For example, if the deviation is between -0.5mm and 0.5mm, it indicates that the first dry coating width meets the preset requirements, and no adjustment to the first wet coating width is needed. If the deviation exceeds this range, it indicates that the first dry coating width does not meet the preset requirements, and the first wet coating width needs to be adjusted. It should be noted that ±0.5mm is an example of an embodiment of this application, and the specific value can be set according to the actual situation. This application does not specifically limit this value.

[0097] Therefore, in order to reduce the computational load of electronic devices, after acquiring the first dry coating width, if it is determined that the first dry coating width does not meet the preset requirements, the electronic device obtains the first deviation between the first dry coating width and the preset coating width, and calculates the second deviation between the first coating width and the first dry coating width.

[0098] The embodiments of this application reduce the computational load of electronic devices by calculating the first deviation and the second deviation after determining that the first dry coating width does not meet the preset requirements.

[0099] Based on the above embodiments, when determining the first correction amount according to the first deviation and the second deviation, the electronic device can determine it through the following steps:

[0100] If the first deviation between the first dry coating width and the preset coating width indicates that the first dry coating width is greater than the preset coating width, and the second deviation between the first wet coating width and the first dry coating width indicates that the first wet coating width is greater than the first dry coating width, then the first correction amount is determined based on the first deviation.

[0101] If the first deviation between the first dry coating width and the preset coating width indicates that the first dry coating width is greater than the preset coating width, and the second deviation between the first wet coating width and the first dry coating width indicates that the first wet coating width is less than the first dry coating width, then the first correction amount is determined based on the absolute value of the first deviation and the absolute value of the second deviation.

[0102] In the specific implementation process, if the first deviation is greater than 0, it indicates that the first dry coating width is greater than the preset coating width, and it can be preliminarily determined that the first wet coating width needs to be reduced. If the second deviation is greater than 0, it indicates that the first wet coating width is greater than the first dry coating width, which further indicates that the coating width of the first coating area narrows after changing from a wet state to a dry state. If both the first deviation and the second deviation are greater than 0, it indicates that compared to the first wet coating area, the width of the first dry coating area, even after drying and narrowing, is still wider than the preset coating width. In this case, the first correction amount can be determined by the first deviation.

[0103] If the second deviation is less than 0, it indicates that the width of the first dry coating is greater than the width of the first wet coating, meaning that the coating width of the first coating area widens after changing from a wet to a dry state. When the first deviation is greater than 0 and the second deviation is less than 0, it indicates that the width of the first dry coating area, which widens after drying, is wider than the preset coating width compared to the first wet coating area. In this case, it is necessary to determine the main factor causing the width of the first dry film to be greater than the preset coating width based on the absolute values ​​of the first and second deviations (whether the width change of the coating area from a wet to a dry state is dominant, or the deviation between the width of the first dry film and the preset coating width is dominant), and then determine the first correction amount.

[0104] In this embodiment, the first dry coating width is determined by comparing it with the preset coating width. The coating elasticity is determined by comparing the first wet coating width with the first dry coating width. Based on the above results, the first correction amount can be accurately determined.

[0105] Based on the above embodiments, when the electronic device determines the first correction amount according to the first deviation and the second deviation, the following situations may also occur:

[0106] If the first deviation between the first dry coating width and the preset coating width indicates that the first dry coating width is less than the preset coating width, and the second deviation between the first wet coating width and the first dry coating width indicates that the first wet coating width is less than the first dry coating width, then the first correction amount is determined based on the first deviation.

[0107] If the first deviation between the first dry coating width and the preset coating width indicates that the first dry coating width is less than the preset coating width, and the second deviation between the first wet coating width and the first dry coating width indicates that the first wet coating width is greater than the first dry coating width, then the first correction amount is determined based on the absolute value of the first deviation and the absolute value of the second deviation.

[0108] In the specific implementation process, if the first deviation is less than 0, it indicates that the first dry coating width is less than the preset coating width, and it can be preliminarily determined that the first wet coating width needs to be increased. If the second deviation is less than 0, it indicates that the first wet coating width is less than the first dry coating width, further indicating that the coating width of the first coating area has widened after changing from a wet state to a dry state. If both the first deviation and the second deviation are less than 0, it indicates that compared to the first wet coating area, the width of the first dry coating area, which has widened after drying, is still narrower than the preset coating width. At this time, the first correction amount can be determined by the first deviation.

[0109] If the second deviation is greater than 0, it indicates that the width of the first dry coating is less than the width of the first wet coating, meaning that the coating width of the first coating area narrows after changing from a wet to a dry state. When the first deviation is less than 0 and the second deviation is greater than 0, it indicates that the width of the first dry coating area, which narrows after drying, is narrower than the preset coating width compared to the first wet coating area. In this case, it is necessary to determine the main factor causing the width of the first dry film to be less than the preset coating width by analyzing the absolute values ​​of the first and second deviations (whether the width change from a wet to a dry state is dominant, or the deviation between the width of the first dry film and the preset coating width is dominant), and then determine the first correction amount.

[0110] In this embodiment, the first dry coating width is determined by comparing it with the preset coating width. The coating elasticity is determined by comparing the first wet coating width with the first dry coating width. Based on the above results, the first correction amount can be accurately determined.

[0111] Based on the above embodiments, for the case where it is necessary to determine the first correction amount according to the absolute value of the first deviation and the absolute value of the second deviation, the specific method steps are as follows:

[0112] If the difference between the absolute value of the first deviation and the absolute value of the second deviation is greater than zero, the electronic device determines the first correction amount based on the first deviation.

[0113] If the difference between the absolute value of the first deviation and the absolute value of the second deviation is less than zero, the electronic device determines the first correction amount based on the second deviation.

[0114] In the specific implementation process, if the absolute value of the first deviation is greater than the absolute value of the second deviation, it indicates that the first deviation has a greater impact on the coating width. Therefore, the electronic device determines the first correction amount based on the first deviation.

[0115] If the absolute value of the first deviation is less than the absolute value of the second deviation, it indicates that the second deviation has a greater impact on the coating width. Therefore, the electronic device determines the first correction amount based on the second deviation.

[0116] It is understood that the first correction amount in this embodiment is also used to characterize the number of times the spraying device needs to move. Its calculation method is similar to that used in the above embodiments for calculating the first correction amount, and will not be repeated here.

[0117] This application embodiment determines the main factors causing the first dry coating width to fail to meet requirements by calculating the magnitude between the absolute value of the first deviation and the absolute value of the second deviation, and determines the first correction amount based on the main factors, thereby improving the accuracy of the calculation of the first correction amount.

[0118] Based on the above embodiments, after determining the first correction amount, the position of the spraying device can be adjusted according to the relationship between the first dry film width and the preset coating width as follows:

[0119] If the first dry coating width is greater than the preset coating width, the spraying device is controlled to move away from the electrode along the electrode thickness direction according to the first correction amount.

[0120] If the first dry coating width is less than the preset coating width, the spraying device is controlled to move closer to the electrode along the electrode thickness direction according to the first correction amount.

[0121] In the specific implementation process, if the first dry coating width is greater than the preset coating width, it indicates that the first wet coating width needs to be reduced. The electronic device then controls the spraying device to move away from the electrode along the electrode thickness direction, and the distance it moves is the first correction amount. If the first dry coating width is less than the preset coating width, it indicates that the first wet coating width needs to be increased. The electronic device then controls the spraying device to move closer to the electrode along the electrode thickness direction, and the distance it moves is the first correction amount.

[0122] In another embodiment, the electronic device acquires the first wet coating width and the first dry coating width of the first coating area on the electrode, calculates a first deviation based on the first dry coating width and a preset coating width, calculates a second deviation based on the first wet coating width and the first dry coating width, and then determines a first correction amount based on the first deviation and the second deviation. After determining the first correction amount, it is determined whether the first dry coating width meets the preset width requirement. If it does not meet the requirement, the first wet coating width is corrected according to the first correction amount; if it meets the requirement, no processing is performed.

[0123] This application embodiment improves the efficiency and accuracy of coating size adjustment by determining the size of the first dry coating width and the preset coating width, and adjusting the position of the spraying device accordingly.

[0124] Based on the above embodiments, the first wet coating width and the first dry coating width at the same position on the electrode can be collected in the following manner:

[0125] The first wet coating image and the first dry coating image of the first coating area on the electrode at the same location are acquired by an image acquisition device.

[0126] Based on the device parameters of the image acquisition device, the first wet coating width corresponding to the first wet coating image and the first dry coating width corresponding to the first dry coating image are determined.

[0127] In practice, the image acquisition device can be a built-in device on the electronic device for acquiring images, or it can be an external device for acquiring images, such as a CCD camera. If the image acquisition device is an external device, it is communicatively connected to the electronic device and sends the acquired first wet coating image and first dry coating image to the electronic device.

[0128] Different image acquisition devices have different equipment parameters, resulting in different actual widths for each pixel in the acquired image. Of course, the distance between the image acquisition device and the object being acquired also affects the actual width of a single pixel. To accurately obtain the first wet coating width and the first dry coating width, this embodiment of the application can pre-calibrate the image acquisition device, that is, pre-capture an image of an object of known size using the image acquisition device, thereby calibrating the actual width of a single pixel in the acquired image. Then, under the same operating conditions, an image is acquired of the first coating area.

[0129] After obtaining the first wet coating image and the first dry coating image, the electronic device can determine the actual length corresponding to a pixel based on the device parameters of the image acquisition device. Then, it can obtain the first wet coating width based on the number of pixels occupied by the first wet coating area in the width direction in the first wet coating image, and obtain the first dry coating width based on the number of pixels occupied by the first dry coating area in the width direction in the first dry coating image.

[0130] Figure 3 This is a schematic diagram of the control system for the measuring and spraying device of the coating machine provided in the embodiments of this application, as shown below. Figure 3 The structure is as follows: Sequence 1 is an unwinding mechanism used to unwind the electrode substrate; Sequence 2 is a coating device for electrode A side used to spray active material onto electrode A side; Sequence 3 is an active material coating roller for electrode A side; Sequence 4 is a CCD 1 for measuring the wet coating size of electrode A side, used to acquire images of the wet coating area of ​​electrode A side to obtain the corresponding wet coating width; Sequence 5 is an oven used to dry the coated active material; Sequence 6 is a CCD 2 for measuring the dry coating size of electrode A side, used to acquire images of the dry coating area of ​​electrode A side to obtain the corresponding dry coating width; Sequence 7 is a substrate conveyor roller; Sequence 8 is a substrate correction mechanism; Sequence 9 is an active material coating roller for electrode B side; Sequence 10 is a coating device for electrode B side, i.e., an active material coating mechanism for electrode B side; Sequence 11 is an electrode substrate conveyor roller. Sequence 12 is CCD 3, used to measure the wet coating size of the electrode B side, and to acquire images of the wet coating area on the electrode B side to obtain the corresponding wet coating width. Sequence 13 is CCD 4, used to detect the dry coating size of the electrode B side, and to acquire images of the dry coating area on the electrode B side to obtain the corresponding dry coating width. Sequence 14 is the coating and winding mechanism.

[0131] Understandable, Figure 3 A device for coating both sides of an electrode and correcting the coating width is provided. If only the coating width of one side of the electrode needs to be corrected, two CCDs, sequence 4 and sequence 6, or two CCDs, sequence 12 and sequence 13, can be used to collect the coating width of one side of the electrode and adjust the corresponding spraying device.

[0132] The embodiments of this application utilize visual technology to efficiently and accurately determine the first wet coating width and the first dry coating width.

[0133] Based on the above embodiments, the first wet coating width and the first dry coating width of the first coating area on the electrode can be obtained through the following steps:

[0134] Obtain the first wet coating of the first coating area with a first preset length on the electrode, and take the average width of the first wet coating with the preset length as the first wet coating width;

[0135] Obtain a first dry coating of a second preset length, and use the average width of the first dry coating of the preset length as the width of the first dry coating.

[0136] In the specific implementation process, during the coating process, the first wet coating width may suddenly widen or narrow within a short period of time due to the unstable operation of the coating machine. However, at other times, the first wet coating width and the first dry coating width are stable and within the normal width requirement range. If only the first wet coating width and the first dry coating width at the time of the sudden change are collected, the accurate first wet coating width and the first dry coating width cannot be reflected. Consequently, it is impossible to accurately correct the first wet coating width to obtain the first dry coating width that meets the requirements.

[0137] To address this technical problem, in this embodiment, the electronic device uses the average width of a first wet coating of a preset length as the first wet coating width, and the average width of a first dry coating of a preset length as the first dry coating width. The preset length is predetermined, for example, it can be 5 meters, 10 meters, 20 meters, etc., and this embodiment does not specifically limit it.

[0138] When calculating the average width of the first wet coating, the width of each measurement point can be measured at predetermined intervals on the first wet coating. Multiple measurement points can be obtained on the first wet coating, and their widths can be summed and averaged to obtain the width of the first wet coating.

[0139] Similarly, when calculating the average width of the first dry coating, a second preset length of the first dry coating can be used. The first preset length and the second preset length can be the same or different. The first dry coating and the first wet coating can be the first coating area at the same location on the electrode. On the first dry coating, the position corresponding to the measurement point on the first wet coating is used as the measurement point, and the width of this measurement point is measured. Multiple measurement points can be obtained on the first dry coating; summing and averaging them yields the width of the first dry coating.

[0140] It is understandable that the length of the preset interval is less than the first preset length and the second preset length.

[0141] The embodiments of this application use the average value of a coating area to more accurately reflect the first wet coating width and the first dry coating width.

[0142] Based on the above embodiments, in addition to being applicable to application scenarios where the electrode has only one coating area, this application embodiment can also be applied to application scenarios where the electrode has two or more coating areas. Taking an electrode with two coating areas as an example, the electrode has a first coating area and a second coating area, and the first coating area and the second coating area are arranged in parallel along the length direction of the electrode substrate. Figure 4 This is a schematic diagram of a 1-out-2 equal-width film electrode provided in an embodiment of this application, as shown below. Figure 4 As shown, the coating area on the left is called the first coating area, and the coating area on the right is called the second coating area. If the electrode has not been dried, then W1 is the width of the first wet coating area, and W2 is the width of the second wet coating area.

[0143] The embodiments of this application can correct the coating dimensions of the first coating area and the second coating area, as detailed below:

[0144] The electronic device collects the second wet coating width and the second dry coating width of the second coating area on the electrode sheet;

[0145] If the second dry coating width does not meet the preset width requirement, then calculate the third deviation between the second dry coating width and the preset coating width, and the fourth deviation between the first wet coating width and the first dry coating width.

[0146] The second correction amount is determined based on the third and fourth deviations.

[0147] In specific implementation, the second wet coating width and the second dry coating width can correspond to the second coating area at the same location. "Same location" can be understood as the same area within the second coating area. For example, if the second wet coating width is the coating size of the area between the 1st and 2nd meters of the second coating area, then the second dry coating width is also the coating size of the area between the 1st and 2nd meters of the second coating area. It is understood that the purpose of defining the second wet coating width and the second dry coating width at the same location in this embodiment is to enable the calculation of the width change of the same area after it changes from a wet state to a dry state in subsequent steps. Of course, the second wet coating width and the second dry coating width may not completely correspond to the same location; there may be a slight deviation. For example, if the second wet coating width is the coating size of the area between the 1st and 2nd meters of the second coating area, then the second dry coating width is also the coating size of the area between the 1.1st and 2.1st meters of the second coating area.

[0148] It is understood that the methods for obtaining the second wet coating width and the second dry coating width are the same as those for obtaining the first wet coating width and the first dry coating width in the above embodiments, and will not be repeated here.

[0149] Similarly, the method for determining whether the width of the second dry coating meets the preset width requirement is the same as the method for determining the width of the first dry coating, and will not be repeated here.

[0150] After acquiring the second dry coating width, if the electronic device determines that the second dry coating width does not meet the preset width requirement, it obtains a third deviation between the second dry coating width and the preset coating width, and calculates a fourth deviation between the second coating width and the second dry coating width. The third deviation can be obtained by subtracting the preset coating width from the second dry coating width, or by subtracting the second dry coating width from the preset coating width. The fourth deviation can be obtained by subtracting the second dry coating width from the second wet coating width, or by subtracting the second wet coating width from the second dry coating width. It should be noted that the specific methods for obtaining the third and fourth deviations will affect subsequent steps. This embodiment uses the example of obtaining the third deviation by subtracting the preset coating width from the second dry coating width and obtaining the fourth deviation by subtracting the second dry coating width from the second wet coating width to describe the process.

[0151] The second correction amount characterizes the amount by which the position of the spraying device needs to be adjusted. It can be either the specific distance the spraying device needs to be adjusted by, or the number of adjustments required. It is understood that the number of adjustments required corresponds to the distance of the spraying device from the electrode thickness direction. After obtaining the third and fourth deviations, the electronic equipment can determine the second correction amount that needs to be adjusted for the spraying device based on these deviations.

[0152] It should be noted that, in this embodiment, since the first coating area and the second coating area each have their own correction amount (i.e., the first coating area corresponds to the first correction amount, and the second coating area corresponds to the second correction amount), and both the first and second correction amounts are used to correct the coating device, in order to ensure that the first and second coating areas do not interfere with each other during correction, each end of the coating device can be assigned a coating area. For example, when it is necessary to adjust the width of the first wet coating, the left end of the coating device can be adjusted; when it is necessary to adjust the width of the second wet coating, the right end of the coating device can be adjusted.

[0153] The embodiments of this application can be applied to a one-to-two coating process, and simultaneously achieve dimensional correction of the first coating area and the second coating area, thereby improving the efficiency of correction.

[0154] Based on the above embodiments, when determining the second correction amount according to the third and fourth deviations, the electronic device can determine it through the following steps:

[0155] If the third deviation indicates that the second dry coating width is greater than the preset coating width, and the fourth deviation indicates that the second wet coating width is greater than the second dry coating width, then the second correction amount is determined according to the third deviation.

[0156] If the third deviation indicates that the second dry coating width is greater than the preset coating width, and the fourth deviation indicates that the second wet coating width is less than the second dry coating width, then the second correction amount is determined based on the absolute values ​​of the third deviation and the fourth deviation.

[0157] In the specific implementation process, if the third deviation is greater than 0, it indicates that the second dry coating width is greater than the preset coating width, and it can be preliminarily determined that the second wet coating width needs to be reduced. If the fourth deviation is greater than 0, it indicates that the second wet coating width is greater than the second dry coating width, which further indicates that the coating width of the second coating area narrows after changing from a wet state to a dry state. If both the third and fourth deviations are greater than 0, it indicates that compared to the second wet coating area, the width of the second dry coating area, even after drying and narrowing, is still wider than the preset coating width. In this case, the second correction amount can be determined by the third deviation, specifically, the third deviation can be used as the second correction amount.

[0158] If the fourth deviation is less than 0, it indicates that the width of the second dry coating is greater than the width of the second wet coating, meaning that the coating width of the second coating area widens after changing from a wet to a dry state. If the third deviation is greater than 0 and the fourth deviation is less than 0, it indicates that the width of the second dry coating area, which widens after drying, is wider than the preset coating width compared to the second wet coating area. In this case, it is necessary to determine the main factor causing the width of the second dry film to be greater than the preset coating width based on the absolute values ​​of the third and fourth deviations (whether the width change from a wet to a dry state is dominant, or the deviation between the second dry film width and the preset coating width is dominant), and then determine the second correction amount.

[0159] In this embodiment, the second dry coating width is determined by comparing it with the preset coating width. The elasticity of the coating is determined by the second wet coating width and the second dry coating width. Based on the above results, the second correction amount can be accurately determined.

[0160] Based on the above embodiments, when the electronic device determines the second correction amount according to the third and fourth deviations, the following situations may also occur:

[0161] If the third deviation indicates that the second dry coating width is less than the preset coating width, and the fourth deviation indicates that the second wet coating width is less than the second dry coating width, then the second correction amount is determined according to the third deviation.

[0162] If the third deviation indicates that the second dry coating width is less than the preset coating width, and the fourth deviation indicates that the first wet coating width is greater than the second dry coating width, then the second correction amount is determined based on the absolute values ​​of the third deviation and the fourth deviation.

[0163] In the specific implementation process, if the third deviation is less than 0, it indicates that the second dry coating width is less than the preset coating width, and it can be preliminarily determined that the second wet coating width needs to be increased. If the fourth deviation is less than 0, it indicates that the second wet coating width is less than the second dry coating width, further indicating that the coating width of the second coating area has widened after changing from a wet state to a dry state. If both the third and fourth deviations are less than 0, it indicates that compared to the second wet coating area, the width of the second dry coating area, which has widened after drying, is still narrower than the preset coating width. In this case, the second correction amount can be determined by the third deviation, specifically, the third deviation can be used as the second correction amount.

[0164] If the fourth deviation is greater than 0, it indicates that the width of the second dry coating is less than the width of the second wet coating, meaning that the coating width narrows after the second coating area changes from a wet to a dry state. When the third deviation is less than 0 and the fourth deviation is greater than 0, it indicates that the width of the second dry coating area, which narrows after drying, is narrower than the preset coating width compared to the second wet coating area. In this case, it is necessary to determine the main factor causing the width of the second dry film to be less than the preset coating width by analyzing the absolute values ​​of the third and fourth deviations (whether the width change of the coating area from a wet to a dry state is dominant, or whether the deviation between the second dry film width and the preset coating width is dominant), and then determine the second correction amount.

[0165] Understandably, the second correction amount represents the distance that the end of the spraying device corresponding to the second coating area needs to move.

[0166] In this embodiment, the second dry coating width is determined by comparing it with the preset coating width. The coating elasticity is determined by the first wet coating width and the second dry coating width. Based on the above results, the second correction amount can be accurately determined.

[0167] In the specific implementation process, if the absolute value of the third deviation is greater than the absolute value of the fourth deviation, it indicates that the third deviation has a greater impact on the coating width. Therefore, the electronic equipment determines the second correction amount based on the third deviation.

[0168] If the absolute value of the third deviation is less than the absolute value of the fourth deviation, it indicates that the fourth deviation has a greater impact on the coating width. Therefore, the electronic device determines the second correction amount based on the fourth deviation.

[0169] This application embodiment determines the main factors causing the second dry coating width to fail to meet requirements by calculating the magnitude between the absolute values ​​of the third deviation and the fourth deviation, and determines the second correction amount based on the main factors, thereby improving the accuracy of the second correction amount calculation.

[0170] Based on the above embodiments, after obtaining the first correction amount and the second correction amount, the method further includes:

[0171] The first end of the spraying device is controlled to move along the electrode thickness direction according to the first deviation and the first correction amount; and...

[0172] The third deviation and the second correction amount control the second end of the spraying device to move along the electrode thickness direction;

[0173] The first end is the end of the spraying device that is opposite to the first coating area, and the second end is the end of the spraying device that is opposite to the second coating area.

[0174] In the specific implementation process, after determining the first correction amount, the electronic device, since the first correction amount is used to adjust the first wet coating width of the first coating area, still uses... Figure 3 Taking a product with one coating zone and two coating areas as an example, adjusting the position of the left end of the spraying device can adjust the coating position of the left edge of the first coating zone, thereby adjusting the width of the first wet coating. Similarly, the second correction amount is used to adjust the width of the second wet coating in the second coating zone. Therefore, adjusting the position of the right end of the spraying device can adjust the coating position of the right edge of the second coating zone, thereby adjusting the width of the second wet coating.

[0175] This application embodiment provides a scenario where the wet coating widths of both the first and second coating areas need adjustment. In practical applications, there may be cases where only the first wet coating width needs adjustment, or only the second wet coating width needs adjustment. For the case where only the first wet coating width needs adjustment, the electronic device, after determining the first correction amount, controls the first end of the spraying device to move along the electrode thickness direction, while the second end of the spraying device does not need adjustment. For the case where only the second wet coating width needs adjustment, the electronic device, after determining the second correction amount, controls the second end of the spraying device to move along the electrode thickness direction, while the first end of the spraying device does not need adjustment.

[0176] In this embodiment, the two ends of the spraying device can be adjusted to move along the electrode thickness direction according to the first correction amount and the second correction amount, thereby realizing the adjustment of the individual coating size of multiple coating areas in the electrode.

[0177] Based on the above embodiments, the second wet coating width and the second dry coating width at the same position on the electrode can be obtained in the following manner:

[0178] The second wet coating image and the second dry coating image of the second coating area on the electrode are acquired by an image acquisition device;

[0179] Based on the device parameters of the image acquisition device, the second wet coating width corresponding to the second wet coating image and the second dry coating width corresponding to the second dry coating image are determined.

[0180] In practice, the image acquisition device can be a built-in device on the electronic device or an external device, such as a CCD camera. If the image acquisition device is an external device, it is communicatively connected to the electronic device and sends the acquired second wet coating image and second dry coating image to the electronic device.

[0181] Different image acquisition devices have different equipment parameters, resulting in different actual widths for each pixel in the acquired image. Of course, the distance between the image acquisition device and the object being acquired also affects the actual width for each pixel. To accurately obtain the second wet coating width and the second dry coating width, this embodiment of the application can pre-calibrate the image acquisition device, that is, pre-capture an image of an object of known size using the image acquisition device, thereby calibrating the actual width for each pixel in the acquired image. Then, under the same operating conditions, an image is acquired of the second coating area.

[0182] After obtaining the second wet coating image and the second dry coating image, the electronic device can determine the actual length corresponding to a pixel based on the device parameters of the image acquisition device. Then, it can obtain the second wet coating width based on the number of pixels occupied by the second wet coating area in the width direction in the second wet coating image, and obtain the second dry coating width based on the number of pixels occupied by the second dry coating area in the width direction in the second dry coating image.

[0183] For a 1-to-2 film-width product, during image acquisition, one image acquisition device can be used to acquire the first wet coating image and the second wet coating image, and another image acquisition device can be used to acquire the first dry coating image and the second dry coating image. Of course, the first coating area and the second coating area can be acquired by their respective image acquisition devices. The number of image acquisition devices can be selected according to the actual situation, and this application embodiment does not specifically limit this.

[0184] The embodiments of this application utilize visual technology to efficiently and accurately determine the second wet coating width and the second dry coating width.

[0185] Based on the above embodiments, the second wet coating width and the second dry coating width of the second coating area on the electrode can be obtained through the following methods and steps:

[0186] Obtain the second wet coating of the third preset length on the second coating area of ​​the electrode, and take the average width of the second wet coating of the preset length as the second wet coating width;

[0187] Obtain the second dry coating of the fourth preset length on the second coating area of ​​the electrode, and take the average width of the second dry coating of the preset length as the second dry coating width.

[0188] In the specific implementation process, during the coating process, the second wet coating width may suddenly widen or narrow within a short period of time due to the unstable operation of the coating machine. However, at other times, the second wet coating width and the second dry coating width are stable and within the normal width requirement range. If only the second wet coating width and the second dry coating width at the time of the sudden change are collected, the accurate second wet coating width and the second dry coating width cannot be reflected. Consequently, it is impossible to accurately correct the second wet coating width to obtain the required second dry coating width.

[0189] To address this technical problem, in this embodiment, the electronic device uses the average width of the second wet coating over a third preset length as the second wet coating width, and the average width of the second dry coating over a fourth preset length as the second dry coating width. The preset length is predetermined, for example, it can be 5 meters, 10 meters, 20 meters, etc., and this embodiment does not specifically limit it. It is understood that the third preset length and the fourth preset length can be the same or different.

[0190] Taking the second coating area at the same position as the second wet coating width and the second dry coating width as an example, when calculating the average width of the second wet coating, a measurement point can be taken at every preset interval on the second wet coating, and the width of the measurement point can be measured. The widths of multiple measurement points can be obtained on the second wet coating, and the average of them can be obtained to obtain the width of the second wet coating.

[0191] Similarly, when calculating the average width of the second dry coating, the measurement point can be located on the second dry coating at a position corresponding to the measurement point on the second wet coating, and the width of that measurement point can be measured. Multiple measurement points can be obtained on the second dry coating; summing and averaging these widths yields the width of the second dry coating.

[0192] It is understandable that the length of the preset interval is less than the third preset length and the fourth preset length.

[0193] The embodiments of this application use the average value of a coating area to more accurately reflect the second wet coating width and the second dry coating width.

[0194] Figure 5 This is a schematic diagram of another coating size correction method provided in an embodiment of this application, as shown below. Figure 5 As shown, taking the production process of a 1-out-2 equal film width product as an example, the method includes:

[0195] Step 501: Obtain the first coating size and the second coating area size of the preset length, wherein the first coating size includes the average value A1 of the first wet coating width W1 and the average value B1 of the first dry coating width W1′, and the second coating area size includes the average value A2 of the second wet coating width W2 and the average value B2 of the second dry coating width W2′.

[0196] Step 502: Calculate the first deviation, the second deviation, the third deviation, and the fourth deviation; where the first deviation Wb1 = B1 - M, the second deviation Wb2 = B2 - M, the third deviation Wab1 = A1 - B1, and the fourth deviation Wab2 = A2 - B2; where M is the preset coating width.

[0197] The following steps 503A-519A are performed for the first coating area, and steps 503B-519B are performed for the second coating area. It should be noted that there is no order restriction between steps 503A-519A and steps 503B-519B.

[0198] Step 503A: Determine whether Wb1 is within (-0.5, 0.5); if it is, proceed to step 504A, otherwise proceed to step 505A.

[0199] Step 504A: Determine that the first dry coating width meets the requirements, and repeat step 501.

[0200] Step 505A: Determine if Wb1 is greater than 0. If it is greater than 0, proceed to step 506A; otherwise, proceed to step 513A.

[0201] Step 506A: Determine if Wab1 is ≥ 0. If yes, proceed to step 507A; otherwise, proceed to step 508A.

[0202] Step 507A: Determine the number of adjustments to the spraying device; obtain X by rounding down from X = |Wb1| / 0.2, where X is the number of adjustments to the spraying device, and then proceed to step 512A.

[0203] Step 508A: If Wab1 is less than 0, then calculate |Wab1|-|Wb1|=Wc;

[0204] Step 509A: Determine if Wc is greater than 0. If it is greater than 0, proceed to step 510A; otherwise, proceed to step 511A.

[0205] Step 510A: Determine the number of adjustments to the spraying device; obtain X by taking X = |Wab1| / 0.2 and rounding down, where X is the number of adjustments to the spraying device, and then proceed to step 512A.

[0206] Step 511A: Determine the number of adjustments to the spraying device; obtain X by taking X = |Wb1| / 0.2 and rounding down, where X is the number of adjustments to the spraying device, and then proceed to step 512A.

[0207] Step 512A: Adjust the left end of the spraying device away from the electrode sheet X times along the thickness direction of the electrode sheet.

[0208] Step 513A: Determine if Wab1 > 0. If not, proceed to step 514A; otherwise, proceed to step 515A.

[0209] Step 514A: Determine the number of adjustments to the spraying device; obtain X by rounding down from X = |Wb1| / 0.2, where X is the number of adjustments to the spraying device, and then proceed to step 519A.

[0210] Step 515A: If Wab1≤0, then calculate |Wab1|-|Wb1|=Wc;

[0211] Step 516A: Determine if Wc is greater than 0. If it is greater than 0, proceed to step 517A; otherwise, proceed to step 518A.

[0212] Step 517A: Determine the number of adjustments to the spraying device; obtain X by taking X = |Wab1| / 0.2 and rounding down, where X is the number of adjustments to the spraying device. Then proceed to step 519A.

[0213] Step 518A: Determine the number of adjustments to the spraying device; obtain X by rounding down from X = |Wb1| / 0.2, where X is the number of adjustments to the spraying device, and then proceed to step 519A.

[0214] Step 519A: Move the left end of the spraying device X times along the thickness direction of the electrode sheet.

[0215] Step 503B: Determine if Wb2 is within (-0.5, 0.5); if it is, proceed to step 504B, otherwise proceed to step 505B.

[0216] Step 504B: Determine that the second dry coating width meets the requirements, and repeat step 501.

[0217] Step 505B: Determine if Wb2 is greater than 0. If it is greater than 0, proceed to step 506B; otherwise, proceed to step 513B.

[0218] Step 506B: Determine if Wab2 is ≥ 0. If yes, proceed to step 507B; otherwise, proceed to step 508B.

[0219] Step 507B: Determine the number of adjustments to the spraying device; obtain X by rounding down from X = |Wb2| / 0.2, where X is the number of adjustments to the spraying device, and then proceed to step 512B.

[0220] Step 508B: If Wab2 is less than 0, then calculate |Wab2|-|Wb2|=Wd;

[0221] Step 509B: Determine if Wd is greater than 0. If it is greater than 0, proceed to step 510B; otherwise, proceed to step 511B.

[0222] Step 510B: Determine the number of adjustments to the spraying device; obtain X by taking X = |Wab2| / 0.2 and rounding down, where X is the number of adjustments to the spraying device. Then proceed to step 512B.

[0223] Step 511B: Determine the number of adjustments to the spraying device; obtain X by rounding down from X = |Wb2| / 0.2, where X is the number of adjustments to the spraying device, and then proceed to step 512B.

[0224] Step 512B: Move the right end of the spraying device away from the electrode X times along the electrode thickness direction.

[0225] Step 513B: Determine if Wab2 > 0. If not, proceed to step 514B; otherwise, proceed to step 515B.

[0226] Step 514B: Determine the number of adjustments to the spraying device; obtain X by taking X = |Wb2| / 0.2 and rounding down, where X is the number of adjustments to the spraying device. Then proceed to step 519B.

[0227] Step 515B: If Wab2≤0, then calculate |Wab2|-|Wb2|=Wd;

[0228] Step 516B: Determine if Wd is greater than 0. If it is greater than 0, proceed to step 517B; otherwise, proceed to step 518B.

[0229] Step 517B: Determine the number of adjustments to the spraying device; obtain X by taking X = |Wab2| / 0.2 and rounding down, where X is the number of adjustments to the spraying device, and then proceed to step 519B.

[0230] Step 518B: Determine the number of adjustments to the spraying device; obtain X by rounding down from X = |Wb2| / 0.2, where X is the number of adjustments to the spraying device, and then proceed to step 519B.

[0231] Step 519B: Move the right end of the spraying device X times along the thickness direction of the electrode sheet towards the electrode sheet.

[0232] Figure 6 This is a schematic diagram of a coating size correction device provided in an embodiment of this application. The device can be a module, program segment, or code on an electronic device. It should be understood that this device is similar to the one described above. Figure 1 The method implementation corresponds to this and can be executed. Figure 1 The specific functions of the device involved in the various steps of the method embodiment can be found in the description above; to avoid repetition, detailed descriptions are omitted here. The device includes: a width acquisition module 601, a deviation calculation module 602, and a deviation correction module 603, wherein:

[0233] Width acquisition module 601 is used to acquire the first wet coating width and the first dry coating width of the first coating area on the electrode sheet;

[0234] The deviation calculation module 602 is used to obtain the first deviation between the first dry coating width and the preset coating width, and the second deviation between the first wet coating width and the first dry coating width.

[0235] The correction module 603 is used to determine the first correction amount based on the first deviation and the second deviation.

[0236] Based on the above embodiments, the correction module 603 is specifically used for:

[0237] If the first dry coating width does not meet the preset requirements, then obtain the first deviation between the first dry coating width and the preset coating width, and the second deviation between the first wet coating width and the first dry coating width.

[0238] Based on the above embodiments, the correction module 603 is specifically used for:

[0239] If the first deviation indicates that the first dry coating width is greater than the preset coating width, and the second deviation indicates that the first wet coating width is greater than the first dry coating width, then the first correction amount is determined based on the first deviation.

[0240] If the first deviation indicates that the first dry coating width is greater than the preset coating width, and the second deviation indicates that the first wet coating width is less than the first dry coating width, then the first correction amount is determined based on the absolute value of the first deviation and the absolute value of the second deviation.

[0241] Based on the above embodiments, the correction module 603 is specifically used for:

[0242] If the first deviation indicates that the first dry coating width is less than the preset coating width, and the second deviation indicates that the first wet coating width is less than the first dry coating width, then the first correction amount is determined according to the first deviation.

[0243] If the first deviation indicates that the first dry coating width is less than the preset coating width, and the second deviation indicates that the first wet coating width is greater than the first dry coating width, then the first correction amount is determined based on the absolute value of the first deviation and the absolute value of the second deviation.

[0244] Based on the above embodiments, the correction module 603 is specifically used for:

[0245] If the difference between the absolute value of the first deviation and the absolute value of the second deviation is greater than zero, then the first correction amount is determined based on the first deviation.

[0246] If the difference between the absolute value of the first deviation and the absolute value of the second deviation is less than zero, then the first correction amount is determined based on the second deviation.

[0247] Based on the above embodiments, the device further includes a first adjustment module, used for:

[0248] If the first dry coating width is greater than the preset coating width, the spraying device is controlled to move away from the electrode along the electrode thickness direction according to the first correction amount.

[0249] If the first dry coating width is less than the preset coating width, the spraying device is controlled to move closer to the electrode along the electrode thickness direction according to the first correction amount.

[0250] Based on the above embodiments, the width acquisition module 601 is specifically used for:

[0251] The first wet coating image and the first dry coating image of the first coating area on the electrode are acquired by an image acquisition device.

[0252] Based on the device parameters of the image acquisition device, the first wet coating width corresponding to the first wet coating image and the first dry coating width corresponding to the first dry coating image are determined.

[0253] Based on the above embodiments, the width acquisition module 601 is specifically used for:

[0254] Obtain the first wet coating of the first coating area with a first preset length on the electrode, and take the average width of the first wet coating with the first preset length as the first wet coating width;

[0255] Obtain the first dry coating with a second preset length on the electrode, and use the average width of the first dry coating with the second preset length as the width of the first dry coating.

[0256] Based on the above embodiments, the width acquisition module 601 is further configured to: acquire the second wet coating width and the second dry coating width of the second coating area on the electrode sheet; wherein, the second coating area and the first coating area are arranged in parallel along the length direction of the electrode sheet;

[0257] The deviation calculation module 602 is also used to: if the second dry coating width does not meet the preset width requirement, calculate the third deviation between the second dry coating width and the preset coating width, and the fourth deviation between the first wet coating width and the first dry coating width.

[0258] The correction module 603 is also used to: determine the second correction amount based on the third deviation and the fourth deviation.

[0259] Based on the above embodiments, the correction module 603 is further specifically used for:

[0260] If the third deviation indicates that the second dry coating width is greater than the preset coating width, and the fourth deviation indicates that the second wet coating width is greater than the second dry coating width, then the second correction amount is determined according to the third deviation.

[0261] If the third deviation indicates that the second dry coating width is greater than the preset coating width, and the fourth deviation indicates that the second wet coating width is less than the second dry coating width, then the second correction amount is determined based on the absolute values ​​of the third deviation and the fourth deviation.

[0262] Based on the above embodiments, the correction module 603 is further specifically used for:

[0263] If the third deviation indicates that the second dry coating width is less than the preset coating width, and the fourth deviation indicates that the second wet coating width is less than the second dry coating width, then the second correction amount is determined according to the third deviation.

[0264] If the third deviation indicates that the second dry coating width is less than the preset coating width, and the fourth deviation indicates that the first wet coating width is greater than the second dry coating width, then the second correction amount is determined based on the absolute values ​​of the third deviation and the fourth deviation.

[0265] Based on the above embodiments, the correction module 603 is further specifically used for:

[0266] If the difference between the absolute value of the third deviation and the absolute value of the fourth deviation is greater than zero, then the second correction amount is determined based on the third deviation.

[0267] If the difference between the absolute values ​​of the third deviation and the fourth deviation is less than zero, then the second correction amount is determined based on the fourth deviation.

[0268] Based on the above embodiments, the device further includes a second adjustment module, used for:

[0269] The first end of the spraying device is controlled to move along the electrode thickness direction according to the first deviation and the first correction amount; and...

[0270] The second end of the spraying device is moved along the electrode thickness direction according to the third deviation and the second correction amount;

[0271] The first end is the end of the spraying device that is opposite to the first coating area, and the second end is the end of the spraying device that is opposite to the second coating area.

[0272] Based on the above embodiments, the width acquisition module 601 is further specifically used for:

[0273] The second wet coating image and the second dry coating image of the second coating area on the electrode are acquired by an image acquisition device;

[0274] Based on the device parameters of the image acquisition device, the second wet coating width corresponding to the second wet coating image and the second dry coating width corresponding to the second dry coating image are determined.

[0275] Based on the above embodiments, the width acquisition module 601 is further specifically used for:

[0276] Obtain the second wet coating of the third preset length on the second coating area of ​​the electrode, and take the average width of the second wet coating of the preset length as the second wet coating width;

[0277] Obtain the second dry coating of the fourth preset length on the second coating area of ​​the electrode, and take the average width of the second dry coating of the fourth preset length as the second dry coating width.

[0278] Figure 7 This is a schematic diagram of the physical structure of the electronic device provided in the embodiments of this application, such as... Figure 7 As shown, the electronic device includes: a processor 701, a memory 702, and a bus 703; wherein,

[0279] The processor 701 and the memory 702 communicate with each other through the bus 703;

[0280] The processor 701 is used to call program instructions in the memory 702 to execute the methods provided in the above method embodiments, such as: acquiring the first wet coating width and the first dry coating width of the first coating area on the electrode; obtaining the first deviation between the first dry coating width and the preset coating width, and the second deviation between the first wet coating width and the first dry coating width; and determining the first correction amount based on the first deviation and the second deviation.

[0281] The processor 701 can be an integrated circuit chip with signal processing capabilities. The processor 701 can be a general-purpose processor, including a central processing unit (CPU), a network processor (NP), etc.; it can also be a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components. It can implement or execute the various methods, steps, and logic block diagrams disclosed in the embodiments of this application. The general-purpose processor can be a microprocessor or any conventional processor.

[0282] The memory 702 may include, but is not limited to, random access memory (RAM), read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), etc.

[0283] This embodiment discloses a computer program product, which includes a computer program stored on a non-transitory computer-readable storage medium. The computer program includes program instructions, and when the program instructions are executed by a computer, the computer can perform the methods provided in the above-described method embodiments, such as: acquiring a first wet coating width and a first dry coating width of a first coating area on an electrode; obtaining a first deviation between the first dry coating width and a preset coating width, and a second deviation between the first wet coating width and the first dry coating width; and determining a first correction amount based on the first deviation and the second deviation.

[0284] This embodiment provides a non-transitory computer-readable storage medium storing computer instructions that cause the computer to execute the methods provided in the above-described method embodiments, such as: acquiring a first wet coating width and a first dry coating width of a first coating area on an electrode; obtaining a first deviation between the first dry coating width and a preset coating width, and a second deviation between the first wet coating width and the first dry coating width; and determining a first correction amount based on the first deviation and the second deviation.

[0285] Figure 8This is a schematic diagram of a coating size correction system provided in an embodiment of this application, as shown below. Figure 8 As shown, the system includes an image acquisition device 802 and a coating size correction device 803; wherein:

[0286] The image acquisition device 802 is communicatively connected to the coating size correction device 803, and is used to acquire image data after the coating equipment 801 coats the electrode, and send the image data to the coating size correction device 803.

[0287] The coating size correction device 803 is used to execute the methods provided in the above embodiments based on image data to correct the coating size and ensure the accuracy of the coating size.

[0288] Figure 9 This is a schematic diagram illustrating the working principle of the coating size correction system provided in the embodiments of this application, as follows: Figure 9 As shown, firstly, the slurry is sprayed onto the current collector using a spraying device to form a wet coating area. A wet coating image is acquired by a wet-film CCD1 and sent to the web correction model. The wet coating area is then dried in an oven. After exiting the oven, a dry coating image is acquired by a dry-film CCD2 and sent to the web correction model. It can be understood that the web correction model is integrated into the coating size correction device. The correction model determines the dimension to be corrected based on the wet and dry coating images and controls the position of the spraying device accordingly.

[0289] The embodiments of this application use the first wet coating width and the first dry coating width collected by the correction device, combined with the preset coating width, to determine the first correction amount that needs to be corrected, thereby improving the efficiency and accuracy of coating size correction.

[0290] Based on the above embodiments, the image acquisition device includes a first image acquisition unit, a second image acquisition unit, a third image acquisition unit, and a fourth image acquisition unit; the first image acquisition unit is disposed on the first side of the oven in the coating equipment and faces the first surface of the electrode sheet, and is used to acquire a wet coating image of the first surface; the second image acquisition unit is disposed on the second side of the oven and faces the first surface of the electrode sheet, and is used to acquire a dry coating image of the first surface; the third image acquisition unit is disposed on the second side of the oven in the coating equipment and faces the second surface of the electrode sheet, and is used to acquire a wet coating image of the second surface; the fourth image acquisition unit is disposed on the first side of the oven and faces the second surface of the electrode sheet, and is used to acquire a dry coating image of the second surface.

[0291] For specific implementation details, please refer to the above. Figure 3 The diagram shown is a schematic of the control system for the measuring and spraying device of the coating machine. Figure 3In the sequence, sequence 4 is the first image acquisition device, sequence 6 is the second image acquisition device, sequence 12 is the third image acquisition device, and sequence 13 is the fourth image acquisition device.

[0292] In the embodiments provided in this application, it should be understood that the disclosed apparatus and methods can be implemented in other ways. The apparatus embodiments described above are merely illustrative. For example, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. Furthermore, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Additionally, the displayed or discussed mutual couplings, direct couplings, or communication connections may be through some communication interfaces; indirect couplings or communication connections between devices or units may be electrical, mechanical, or other forms.

[0293] Furthermore, the units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0294] Furthermore, the functional modules in the various embodiments of this application can be integrated together to form an independent part, or each module can exist independently, or two or more modules can be integrated to form an independent part.

[0295] In this document, relational terms such as first and second are used only to distinguish one entity or operation from another entity or operation, without necessarily requiring or implying any such actual relationship or order between these entities or operations.

[0296] The above description is merely an embodiment of this application and is not intended to limit the scope of protection of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A method of coating size correction, characterized by, include: Collect the first wet coating width and the first dry coating width of the first coating area on the electrode sheet; Obtain a first deviation between the first dry coating width and a preset coating width, and a second deviation between the first wet coating width and the first dry coating width; The first correction amount is determined based on the first deviation and the second deviation.

2. The method of claim 1, wherein, The step of obtaining the first deviation between the first dry coating width and the preset coating width, and the second deviation between the first wet coating width and the first dry coating width, includes: If the first dry coating width does not meet the preset requirements, then obtain the first deviation between the first dry coating width and the preset coating width, and the second deviation between the first wet coating width and the first dry coating width.

3. The method of claim 1, wherein, Determining the first correction amount based on the first deviation and the second deviation includes: If the first deviation indicates that the first dry coating width is greater than the preset coating width, and the second deviation indicates that the first wet coating width is greater than the first dry coating width, then the first correction amount is determined based on the first deviation. If the first deviation indicates that the first dry coating width is greater than the preset coating width, and the second deviation indicates that the first wet coating width is less than the first dry coating width, then the first correction amount is determined based on the absolute value of the first deviation and the absolute value of the second deviation.

4. The method according to claim 1, characterized in that, Determining the first correction amount based on the first deviation and the second deviation includes: If the first deviation indicates that the first dry coating width is less than the preset coating width, and the second deviation indicates that the first wet coating width is less than the first dry coating width, then the first correction amount is determined based on the first deviation. If the first deviation indicates that the first dry coating width is less than the preset coating width, and the second deviation indicates that the first wet coating width is greater than the first dry coating width, then the first correction amount is determined based on the absolute value of the first deviation and the absolute value of the second deviation.

5. The method according to claim 3 or 4, characterized in that, Determining the first correction amount based on the absolute value of the first deviation and the absolute value of the second deviation includes: If the difference between the absolute value of the first deviation and the absolute value of the second deviation is greater than zero, then the first correction amount is determined based on the first deviation. If the difference between the absolute value of the first deviation and the absolute value of the second deviation is less than zero, then the first correction amount is determined based on the second deviation.

6. The method according to claim 1, characterized in that, After determining the first correction amount, the method further includes: If the first dry coating width is greater than the preset coating width, then the spraying device is controlled to move away from the electrode along the electrode thickness direction according to the first correction amount; If the first dry coating width is less than the preset coating width, then the spraying device is controlled to move closer to the electrode along the electrode thickness direction according to the first correction amount.

7. The method according to any one of claims 1-4, characterized in that, The first wet coating width and the first dry coating width of the first coating area on the acquisition electrode include: The first wet coating image and the first dry coating image of the first coating area on the electrode are acquired by an image acquisition device. Based on the device parameters of the image acquisition device, the first wet coating width corresponding to the first wet coating image and the first dry coating width corresponding to the first dry coating image are determined.

8. The method according to any one of claims 1-4, characterized in that, The first wet coating width and the first dry coating width of the first coating area on the acquisition electrode include: Obtain the first wet coating of the first coating area with a first preset length on the electrode sheet, and take the average width of the first wet coating with the first preset length as the first wet coating width; Obtain the first dry coating of the second preset length on the electrode, and take the average width of the first dry coating of the second preset length as the width of the first dry coating.

9. The method according to claim 1, characterized in that, The method further includes: The second wet coating width and the second dry coating width of the second coating area on the electrode are collected; wherein the second coating area and the first coating area are arranged parallel to each other in the length direction of the electrode; If the second dry coating width does not meet the preset width requirement, then calculate the third deviation between the second dry coating width and the preset coating width, and the fourth deviation between the second wet coating width and the second dry coating width. The second correction amount is determined based on the third deviation and the fourth deviation.

10. The method according to claim 9, characterized in that, The step of determining the second correction amount based on the third deviation and the fourth deviation includes: If the third deviation indicates that the second dry coating width is greater than the preset coating width, and the fourth deviation indicates that the second wet coating width is greater than the second dry coating width, then the second correction amount is determined according to the third deviation. If the third deviation indicates that the second dry coating width is greater than the preset coating width, and the fourth deviation indicates that the second wet coating width is less than the second dry coating width, then the second correction amount is determined based on the absolute values ​​of the third deviation and the fourth deviation.

11. The method according to claim 9, characterized in that, The step of determining the second correction amount based on the third deviation and the fourth deviation includes: If the third deviation indicates that the second dry coating width is less than the preset coating width, and the fourth deviation indicates that the second wet coating width is less than the second dry coating width, then the second correction amount is determined according to the third deviation. If the third deviation indicates that the second dry coating width is less than the preset coating width, and the fourth deviation indicates that the second wet coating width is greater than the second dry coating width, then the second correction amount is determined based on the absolute values ​​of the third deviation and the fourth deviation.

12. The method according to claim 10 or 11, characterized in that, Determining the second correction amount based on the absolute value of the third deviation and the absolute value of the fourth deviation includes: If the difference between the absolute value of the third deviation and the absolute value of the fourth deviation is greater than zero, then the second correction amount is determined based on the third deviation; If the difference between the absolute value of the third deviation and the absolute value of the fourth deviation is less than zero, then the second correction amount is determined based on the fourth deviation.

13. The method according to claim 9, characterized in that, After obtaining the first correction amount and the second correction amount, the method further includes: The first end of the spraying device is controlled to move along the electrode thickness direction based on the first deviation and the first correction amount; and... The second end of the spraying device is controlled to move along the electrode thickness direction according to the third deviation and the second correction amount; Wherein, the first end is the end of the spraying device opposite to the first coating area, and the second end is the end of the spraying device opposite to the second coating area.

14. The method according to any one of claims 9-11, characterized in that, The second wet coating width and the second dry coating width of the second coating area on the collecting electrode include: The second wet coating image and the second dry coating image of the second coating area on the electrode are acquired by an image acquisition device; Based on the device parameters of the image acquisition device, the second wet coating width corresponding to the second wet coating image and the second dry coating width corresponding to the second dry coating image are determined.

15. The method according to any one of claims 9-11, characterized in that, The second wet coating width and the second dry coating width of the second coating area on the collecting electrode include: Obtain a second wet coating of a third preset length on the second coating area of ​​the electrode sheet, and take the average width of the second wet coating of the third preset length as the width of the second wet coating; Obtain the second dry coating of the fourth preset length on the second coating area of ​​the electrode sheet, and take the average width of the second dry coating of the fourth preset length as the second dry coating width.

16. A coating size correction device, characterized in that, include: The width acquisition module is used to collect the first wet coating width and the first dry coating width of the first coating area on the electrode sheet; The deviation calculation module is used to obtain a first deviation between the first dry coating width and the preset coating width, and a second deviation between the first wet coating width and the first dry coating width. The correction module is used to determine a first correction amount based on the first deviation and the second deviation.

17. An electronic device, characterized in that, include: Processor, memory, and bus, among which, The processor and the memory communicate with each other via the bus; The memory stores program instructions that can be executed by the processor, and the processor can execute the method as described in any one of claims 1-15 by calling the program instructions.

18. A non-transitory computer-readable storage medium, characterized in that, The non-transitory computer-readable storage medium stores computer instructions that, when executed by a computer, cause the computer to perform the method as described in any one of claims 1-15.

19. A computer program product, characterized in that, The computer program product includes a computer program stored on a non-transitory computer-readable storage medium, the computer program including program instructions that, when executed by a computer, enable the computer to perform the method as described in any one of claims 1-15.

20. A coating size correction system, characterized in that, include: Image acquisition device and coating size correction device; wherein: The image acquisition device is communicatively connected to the coating size correction device, and is used to acquire image data of the electrode sheet after the coating equipment coats it, and send the image data to the coating size correction device. The coating size correction device is used to perform the method as described in any one of claims 1-15 based on the image data.

21. The system according to claim 20, characterized in that, The image acquisition device includes a first image acquisition unit, a second image acquisition unit, a third image acquisition unit, and a fourth image acquisition unit; The first image acquisition device is set on the first side of the oven in the coating equipment and faces the first surface of the electrode sheet, for acquiring the wet coating image of the first surface; The second image acquisition device is located on the second side of the oven and faces the first surface of the electrode sheet, and is used to acquire the dry coating image of the first surface; The third image acquisition device is located on the second side of the oven in the coating equipment and faces the second surface of the electrode sheet, and is used to acquire the wet coating image of the second surface; The fourth image acquisition device is located on the first side of the oven and faces the second side of the electrode sheet, and is used to acquire the dry coating image of the second side.

Images