Methods and apparatus for coating correction

Abstract

This application provides a coating correction method and apparatus that can effectively improve battery performance. The method includes: acquiring a plurality of first distances and a plurality of second distances, wherein each of the plurality of first distances is the distance from the edge of a coating area on a first surface of an electrode substrate to a reference edge, and each of the plurality of second distances is the distance from the edge of a coating area on a second surface of the electrode substrate to the reference edge; the plurality of first distances and the plurality of second distances are obtained by sampling multiple times within a sampling period; and determining a target correction amount during the coating process based on the plurality of first distances, the plurality of second distances, and at least one preset correction amount.

Description

Technical Field

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

[0002] Energy conservation and emission reduction are key to the sustainable development of the automotive industry. In this context, electric vehicles, due to their energy-saving and environmentally friendly advantages, have become an important component of the automotive industry's sustainable development. And for electric vehicles, battery technology is a crucial factor in their development.

[0003] The battery manufacturing process is quite complex, involving multiple steps. Among them, the coating process is an indispensable step, as it has a crucial impact on battery performance. Summary of the Invention

[0004] This application provides a coating correction method and apparatus that can effectively improve battery performance.

[0005] In a first aspect, a method for coating correction is provided, the method comprising: acquiring a plurality of first distances and a plurality of second distances, wherein each of the plurality of first distances is the distance from the edge of a coating area on a first surface of an electrode substrate to a reference edge, and each of the plurality of second distances is the distance from the edge of a coating area on a second surface of the electrode substrate to the reference edge, the plurality of first distances and the plurality of second distances being obtained by sampling multiple times within a sampling period; and determining a target correction amount during the coating process based on the plurality of first distances, the plurality of second distances and at least one preset correction amount.

[0006] In this embodiment, by obtaining the distance from the edge of the coating area on two corresponding surfaces of the electrode substrate to the reference edge, the coating misalignment size between the two corresponding surfaces can be determined. Then, based on a preset correction amount, the target correction amount during the coating process is determined, enabling the target correction amount to be determined with high efficiency and accuracy. Correction based on this target correction amount ensures that the coating misalignment size between the two corresponding surfaces remains within specifications, thereby effectively improving battery performance. Furthermore, the multiple first distances and multiple second distances used to determine the target correction amount are obtained through multiple samplings within a single sampling period. This means that the number of parameters used to determine the target correction amount is large, thus effectively improving the accuracy of the determined target correction amount.

[0007] In some possible implementations, determining the target correction amount during the coating process based on the plurality of first distances, the plurality of second distances, and at least one preset correction amount includes: determining a plurality of initial correction amounts based on each first distance, the second distance corresponding to each first distance, and the at least one preset correction amount; and determining the target correction amount based on the plurality of initial correction amounts.

[0008] The above technical solution first determines multiple initial correction values ​​based on each first distance, each second distance, and at least one preset correction value, and then determines the target correction value based on the multiple initial correction values. That is, an intermediate parameter is determined during the correction process, and the final target correction value is determined based on the intermediate parameter, thereby effectively reducing the complexity of the whole process and thus effectively improving the correction efficiency.

[0009] In some possible implementations, determining the target correction amount based on the plurality of initial correction amounts includes: determining the target correction amount based on the average of the plurality of initial correction amounts.

[0010] The above technical solution determines the target correction amount based on the average of multiple initial correction amounts, which requires less computation, is simple to implement, and greatly improves the computation speed.

[0011] In some possible implementations, the plurality of first distances includes a first target distance, and the plurality of second distances includes a second target distance, wherein the first target distance and the second target distance are distances obtained in the same sampling; determining a plurality of initial correction amounts based on each first distance, the second distance corresponding to each first distance, and the at least one preset correction amount includes: determining a first misalignment value set based on the first target distance and the second target distance, wherein the first misalignment value set includes a first misalignment value between the edge of a coating area on at least one first surface and the edge of a corresponding coating area on the second surface in the width direction of the electrode substrate; and determining a first initial correction amount among the plurality of initial correction amounts based on the first misalignment value and the at least one preset correction amount.

[0012] The above technical solution determines the misalignment value between two corresponding surfaces based on one of a plurality of first distances and its corresponding second distance, which is simple to implement and effectively reduces the complexity of implementation. Furthermore, an initial correction amount is determined based on the misalignment value between the two corresponding surfaces and a preset correction amount, enabling the initial correction amount to be determined with high efficiency and accuracy.

[0013] In some possible implementations, determining the first initial correction amount among the plurality of initial correction amounts based on the first misalignment value and the at least one preset correction amount includes: sequentially performing initial correction on the first misalignment value using the at least one preset correction amount to obtain at least one set of second misalignment values, wherein each of the at least one set of second misalignment values ​​is a set of misalignment values ​​after performing initial correction on the first misalignment value using the same preset correction amount, and the number of the at least one set of second misalignment values ​​is the same as the number of the at least one preset correction amount; and determining the first initial correction amount based on the at least one set of second misalignment values, the at least one preset correction amount, and the first misalignment value.

[0014] The above technical solution first uses a preset correction amount to perform initial correction on the misalignment value between two corresponding surfaces. Then, based on the result of the initial correction, it determines the initial correction amount. This helps to eliminate unsuitable correction amounts from the preset correction amounts, reducing the computational workload of determining the initial correction amount and thus improving the efficiency of determining the initial correction amount and performing the correction. Furthermore, this technical solution employs closed-loop logic, which further improves the accuracy of the initial correction amount.

[0015] In some possible implementations, each of the at least one set of second misaligned values ​​includes at least one second misaligned value. Determining the first initial correction amount based on the at least one set of second misaligned values, the at least one preset correction amount, and the first misaligned value includes: selecting the second misaligned value with the largest absolute value from each of the at least one set of second misaligned values; determining a second target misaligned value, where the second target misaligned value is a misaligned value less than the first target misaligned value among the at least one second misaligned value with the largest absolute value, and the first target misaligned value is the misaligned value with the largest absolute value in the first set of misaligned values; and determining the first initial correction amount based on a first preset correction amount among the at least one preset correction amount, where the first preset correction amount includes the preset correction amount corresponding to the second target misaligned value.

[0016] During the correction process, if using a certain correction amount to correct a misaligned value results in an absolute misalignment value that is larger than before correction—meaning the correction worsens the misalignment—then that correction amount is unsuitable. Therefore, the above technical solution selects misalignment values ​​after initial correction whose absolute values ​​are smaller than before correction, and determines the initial correction amount based on the selected misalignment value, thus discarding unsuitable correction amounts. This not only reduces the probability of the correction worsening the misalignment, but also ensures that the number of suitable correction amounts selected is less than the initially preset number, effectively reducing the time spent determining the initial correction amount and improving efficiency.

[0017] In some possible implementations, when there are multiple first preset correction amounts, determining the first initial correction amount based on the first preset correction amount among the at least one preset correction amount includes: selecting a set of misaligned values ​​from the second misaligned value set after initial correction of the first misaligned values ​​using the first preset correction amount, to obtain at least one second target misaligned value set; and determining the first initial correction amount based on the second misaligned value included in each second target misaligned value set in the at least one second target misaligned value set.

[0018] The above technical solution, based on the initial correction value obtained after initial correction of the misalignment value between two surfaces using an appropriate correction amount, determines the initial correction amount, which can greatly improve the accuracy of the determined initial correction amount.

[0019] In some possible implementations, determining the first initial correction amount based on the second misalignment value included in each of the at least one second target misalignment value sets includes: adding the second misalignment values ​​included in each of the second target misalignment value sets to obtain at least one sum of misalignment values; and determining the first preset correction amount corresponding to the sum of the misalignment values ​​with the smallest absolute value among the at least one sum of misalignment values ​​as the first initial correction amount.

[0020] The above technical solution, based on the rule that the sum of the errors approaches zero after correction (i.e., the smaller the sum, the better), determines the preset correction amount corresponding to the sum of the errors with the smallest absolute value among the sums of the errors as the initial correction amount. The accuracy of the initial correction amount determined in this way is relatively high, and the accuracy of the target correction amount determined based on the initial correction amount is also relatively high. This results in a better effect after correction based on the target correction amount, further improving the performance of the battery.

[0021] In some possible implementations, when the number of the first preset correction amount is one, determining the first initial correction amount based on the first preset correction amount among the at least one preset correction amount includes: determining the first preset correction amount as the first initial correction amount.

[0022] The above technical solution, when the number of the first preset correction amount is one, determines the first preset correction amount as the initial correction amount, which not only greatly reduces the computational complexity, but also has a high accuracy in determining the initial correction amount.

[0023] In some possible implementations, the method further includes: sending correction information to a correction mechanism, the correction information indicating the target correction amount; receiving response information sent by the correction mechanism, the response information indicating that the correction of the electrode substrate or coating die has ended; and, in response to the response information, determining whether the misalignment value between each first distance and the corresponding second distance after correction is within a preset range.

[0024] The above technical solution, after the correction is completed, judges the correction effect by information interaction with the correction mechanism. This is not only easy to implement, but also reduces the probability that the misalignment value between the first distance and the corresponding second distance is still not within the preset range due to poor correction effect, which would lead to poor battery performance.

[0025] In some possible implementations, the at least one preset correction amount includes at least one of the following correction amounts: -0.1mm, 0.1mm, -0.2mm, 0.2mm, -0.3mm, 0.3mm, -0.4mm, 0.4mm, -0.5mm, and 0.5mm.

[0026] The above technical solution sets at least one preset correction amount to at least one of -0.1mm, 0.1mm, -0.2mm, 0.2mm, -0.3mm, 0.3mm, -0.4mm, 0.4mm, -0.5mm, and 0.5mm. This not only corrects the misalignment of the coated AB side to within the specification range, but also meets the correction accuracy of the correction mechanism and reduces the probability of strip breakage of the electrode substrate.

[0027] Secondly, a coating correction device is provided, comprising: an acquisition unit for acquiring a plurality of first distances and a plurality of second distances, wherein each of the plurality of first distances is the distance from the edge of the coating area on a first surface of the electrode substrate to a reference edge, and each of the plurality of second distances is the distance from the edge of the coating area on a second surface of the electrode substrate to the reference edge, and the plurality of first distances and the plurality of second distances are obtained by sampling multiple times within a sampling period; and a determination unit for determining a target correction amount during the coating process based on the plurality of first distances, the plurality of second distances, and at least one preset correction amount.

[0028] In some possible implementations, the determining unit is specifically used to: determine a plurality of initial correction values ​​based on each first distance, the second distance corresponding to each first distance, and the at least one preset correction value; and determine the target correction value based on the plurality of initial correction values.

[0029] In some possible implementations, the determining unit is specifically used to: determine the target correction amount based on the average of the plurality of initial correction amounts.

[0030] In some possible implementations, the plurality of first distances includes a first target distance, the plurality of second distances includes a second target distance, and the first target distance and the second target distance are distances obtained in the same sampling; the determining unit is specifically used to: determine a first misalignment value set based on the first target distance and the second target distance, the first misalignment value set including a first misalignment value between the edge of a coating area on at least one first surface and the edge of a corresponding coating area on the second surface in the width direction of the electrode substrate; and determine a first initial correction amount among the plurality of initial correction amounts based on the first misalignment value and the at least one preset correction amount.

[0031] In some possible implementations, the apparatus further includes: a correction unit, configured to sequentially perform initial correction on the first misalignment value using the at least one preset correction amount to obtain at least one set of second misalignment values, wherein each of the at least one set of second misalignment values ​​is a set of misalignment values ​​after initial correction on the first misalignment value using the same preset correction amount, and the number of the at least one set of second misalignment values ​​is the same as the number of the at least one preset correction amount; the determining unit is specifically configured to: determine the first initial correction amount based on the at least one set of second misalignment values, the at least one preset correction amount, and the first misalignment value.

[0032] In some possible implementations, the apparatus further includes: a selection unit, configured to select the second misalignment value with the largest absolute value in each of the at least one second misalignment value set; the determining unit is specifically configured to: determine a second target misalignment value, wherein the second target misalignment value is a misalignment value less than a first target misalignment value among at least one of the second misalignment values ​​with the largest absolute value, and the first target misalignment value is the misalignment value with the largest absolute value in the first misalignment value set; and determine a first initial correction amount based on a first preset correction amount among the at least one preset correction amount, wherein the first preset correction amount includes a preset correction amount corresponding to the second target misalignment value.

[0033] In some possible implementations, when there are multiple first preset correction amounts, the selection unit is specifically used to: select, from the second misalignment value set, a set of misalignment values ​​after initial correction of the first misalignment value using the first preset correction amount, to obtain at least one second target misalignment value set; the determining unit is specifically used to: determine the first initial correction amount based on the second misalignment value included in each second target misalignment value set in the at least one second target misalignment value set.

[0034] In some possible implementations, the determining unit is specifically used to: add the second misalignment values ​​included in each second target misalignment value set to obtain at least one sum of misalignment values; and determine the first preset correction amount corresponding to the sum of the misalignment values ​​with the smallest absolute value among the at least one sum of misalignment values ​​as the first initial correction amount.

[0035] In some possible implementations, when the number of the first preset correction amount is one, the determining unit is specifically used to: determine the first preset correction amount as the first initial correction amount.

[0036] In some possible implementations, the device further includes: a communication unit for sending correction information to the correction mechanism, the correction information indicating the target correction amount; the communication unit is also used to receive response information sent by the correction mechanism, the response information indicating that the correction of the electrode substrate or coating die has ended; and a judgment unit for judging, in response to the response information, whether the misalignment value between each first distance and the corresponding second distance after correction is within a preset range.

[0037] In some possible implementations, the at least one preset correction amount includes at least one of the following correction amounts: -0.1mm, 0.1mm, -0.2mm, 0.2mm, -0.3mm, 0.3mm, -0.4mm, 0.4mm, -0.5mm, and 0.5mm.

[0038] Thirdly, an apparatus for coating correction is provided, comprising a processor and a memory, wherein the memory is used to store a computer program, and the processor is used to invoke the computer program to execute the methods in the first aspect or its various implementations described above.

[0039] Fourthly, a computer-readable storage medium is provided for storing a computer program that causes a computer to perform the methods described in the first aspect or its implementations. Attached Figure Description

[0040] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments of this application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on the drawings without creative effort.

[0041] The accompanying drawings are not drawn to scale.

[0042] Figure 1This is a schematic flowchart of a coating correction method according to an embodiment of this application.

[0043] Figure 2 This is a schematic diagram of an AB side coating according to an embodiment of this application.

[0044] Figure 3 This is a schematic flowchart illustrating a specific coating correction method according to an embodiment of this application.

[0045] Figure 4 This is a schematic block diagram of a coating correction device according to an embodiment of this application.

[0046] Figure 5 This is a schematic block diagram of a coating correction device according to an embodiment of this application. Detailed Implementation

[0047] The embodiments of this application will be described in further detail below with reference to the accompanying drawings and examples. The detailed description of the following embodiments and the accompanying drawings are used to illustrate the principles of this application by way of example, but should not be used to limit the scope of this application, that is, this application is not limited to the described embodiments.

[0048] In the description of this application, it should be noted that, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," etc., indicating orientation or positional relationships are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0049] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used in the description of this application 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 description, claims, and accompanying drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the description, claims, or accompanying drawings of this application are used to distinguish different objects, not to describe a specific order or hierarchy.

[0050] In this application, the reference to "embodiment" means that a specific 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 mutually exclusive, independent, or alternative embodiment. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described in this application can be combined with other embodiments.

[0051] With the development of new energy technologies, the application fields of batteries are becoming increasingly widespread. For example, batteries can serve as the main power source for electrical devices (such as vehicles, ships, or spacecraft). It should be understood that the battery mentioned in the embodiments of this application refers to a single physical module comprising one or more battery cells to provide higher voltage and capacity.

[0052] Optionally, the battery can be a power storage battery. In terms of battery type, it can be a lithium-ion battery, lithium metal battery, lead-acid battery, nickel-metal hydride battery, lithium-sulfur battery, lithium-air battery, or sodium-ion battery, etc., and no specific limitation is made in this application embodiment. In terms of battery size, the battery in this application embodiment can be a cell / battery unit, or a battery module or battery pack, and no specific limitation is made in this application embodiment.

[0053] The battery manufacturing process is complex, involving multiple steps such as mixing, coating, rolling, die-cutting, winding, electrolyte injection, and formation. Among these, coating is a crucial step, significantly impacting battery performance. The stability, uniformity, and dimensions of the coating all affect the final battery performance. Specifically, the dimensions of the A and B sides of the coating, including positional dimensions, width dimensions, and A / B side misalignment dimensions, all have a substantial influence on battery performance.

[0054] During the coating process, deviations in the coating result of the electrode sheet may occur due to factors such as the pressure of the coating die nozzle. If the misalignment between the A and B sides of the electrode sheet coating area exceeds a certain range and is not detected and corrected in time, it may seriously affect the performance of the battery, significantly increase the scrap rate of the product, and increase manufacturing costs.

[0055] Based on this, this application proposes a coating correction method. By acquiring a first distance and a second distance, and determining the target correction amount during the coating process based on the first distance, the second distance, and at least one preset correction amount, the method involves obtaining a first distance and a second distance. The first distance is the distance from the edge of the coating area on the first surface of the electrode substrate to a reference edge, and the second distance is the distance from the edge of the coating area on the second surface of the electrode substrate to the reference edge. Thus, by acquiring the distances from the edges of the coating areas on two corresponding surfaces of the electrode substrate to the reference edge, the coating misalignment size between the two corresponding surfaces can be determined. Then, based on the preset correction amount, the target correction amount during the coating process is determined, enabling the target correction amount to be determined with high efficiency and accuracy. Correction based on this target correction amount ensures that the coating misalignment size between the two corresponding surfaces remains within specifications, thereby effectively improving battery performance.

[0056] Figure 1 A schematic flowchart of a coating correction method 100 according to an embodiment of this application is shown. Figure 1 As shown, method 100 may include at least some of the following.

[0057] S110: Obtain multiple first distances and multiple second distances. Each of the multiple first distances is the distance from the edge of the coating area on the first surface of the electrode substrate to a reference edge, and each of the multiple second distances is the distance from the edge of the coating area on the second surface of the electrode substrate to a reference edge. Each first distance and its corresponding second distance are obtained by sampling once within one sampling period.

[0058] S120: Determine the target correction amount during the coating process based on multiple first distances, multiple second distances, and at least one preset correction amount.

[0059] In this embodiment, by obtaining the distance from the edge of the coating area on two corresponding surfaces of the electrode substrate to the reference edge, the coating misalignment size between the two corresponding surfaces can be determined. Then, based on a preset correction amount, the target correction amount during the coating process is determined, enabling the target correction amount to be determined with high efficiency and accuracy. Correction based on this target correction amount ensures that the coating misalignment size between the two corresponding surfaces remains within specifications, thereby effectively improving battery performance. Furthermore, the multiple first distances and multiple second distances used to determine the target correction amount are obtained through multiple samplings within a single sampling period. This means that the number of parameters used to determine the target correction amount is large, thus effectively improving the accuracy of the determined target correction amount.

[0060] The electrode substrate may include, for example, aluminum foil, and the electrode obtained based on this electrode substrate is a positive electrode. Alternatively, the electrode substrate may include, for example, copper foil, and the electrode obtained based on this electrode substrate is a negative electrode.

[0061] The coating area is the region where the slurry is applied. The first surface can be one of the surfaces on the electrode substrate to which the slurry is applied; it can be either the front or the back of the electrode substrate. The second surface can be a surface on the electrode substrate corresponding to the first surface. For example, if the first surface is the front of the electrode substrate, then the second surface is the back of the electrode substrate; if the first surface is the back of the electrode substrate, then the second surface is the front of the electrode substrate.

[0062] The edge of the coating area can refer to the edge of the coating area along its length. It should be understood that the length direction can also be referred to as the longitudinal direction (machine direction, MD) of the electrode.

[0063] The slurry can also be called the active material. If the electrode substrate includes aluminum foil, the slurry can include lithium cobalt oxide, lithium iron phosphate, ternary lithium, or lithium manganese oxide, etc. If the electrode substrate includes copper foil, the slurry can include carbon or silicon, etc.

[0064] The reference edge can be the edge of the electrode substrate along its length, and this edge can be either one or both of the two edges. Alternatively, the reference edge can be an edge manually set by the user.

[0065] Alternatively, measurements can be taken manually, such as by using a measuring tape to obtain multiple first distances and multiple second distances.

[0066] Alternatively, multiple first distances and multiple second distances can be acquired using an imaging device, such as a charge-coupled device (CCD) camera. This significantly improves the efficiency and accuracy of acquiring the first and second distances.

[0067] Within a sampling period, a first distance and a second distance can be obtained by sampling once. Each first distance may include at least one first distance, and each second sub-distance may also include at least one second distance.

[0068] Figure 2 A schematic diagram of coating on sides A and B is shown. Figure 2 The diagram shows a 1-out-of-4 material output. It should be understood that, in addition to a 1-out-of-4 material output, coating production lines can generally also include a 1-out-of-2 material output, a 1-out-of-6 material output, a 1-out-of-8 material output, a 1-out-of-10 material output, and a 1-out-of-12 material output.

[0069] from Figure 2 As can be seen, the first distance on surface A includes four sub-distances, namely AL1, AL2, AL3 and AL4, and the corresponding second distance on surface B includes four second distances, namely BL1, BL2, BL3 and BL4.

[0070] Optionally, a sampling period may include multiple frames of images. For example, a sampling period may include 20 frames of images.

[0071] In some embodiments, S120 may specifically include: determining multiple initial correction values ​​based on each first distance, a second distance corresponding to each first distance, and at least one preset correction value, and then determining a target correction value based on the multiple initial correction values.

[0072] This technical solution first determines multiple initial correction values ​​based on each first distance, each second distance, and at least one preset correction value. Then, it determines the target correction value based on the multiple initial correction values. In other words, an intermediate parameter is determined during the correction process, and the final target correction value is determined based on the intermediate parameter. This effectively reduces the complexity of the entire process and thus effectively improves the correction efficiency.

[0073] As an example, the target correction value can be determined based on the average of multiple initial correction values. For instance, considering that correction values ​​are typically multiples of 0.1, the average value can be rounded to one decimal place. This technical solution, which determines the target correction value based on the average of multiple initial correction values, requires less computation, is simple to implement, and significantly improves the computational speed.

[0074] As another example, the target correction amount can be determined based on the correction amount with the largest or smallest absolute value among multiple initial correction amounts.

[0075] The method for determining the initial correction amount will be described in detail below. For ease of description, the following text will use one of a plurality of first distances and one of a plurality of second distances as examples.

[0076] Multiple first distances may include first target distances, and multiple second distances may include second target distances, wherein the first target distances and second target distances are distances obtained in the same sampling. At this time, determining multiple initial correction amounts based on each first distance, each corresponding second distance, and at least one preset correction amount may include: determining a first misalignment value set based on the first target distances and second target distances, and determining a first initial correction amount among the multiple initial correction amounts based on the first misalignment values ​​and at least one preset correction amount. The first misalignment value set includes first misalignment values ​​between the edge of a coating area on at least one first surface and the edge of a coating area on the corresponding second surface in the width direction of the electrode substrate.

[0077] This technical solution determines the misalignment value between two corresponding surfaces based on one of a plurality of first distances and its corresponding second distance, which is simple to implement and effectively reduces the complexity of implementation. Furthermore, an initial correction amount is determined based on the misalignment value between the two corresponding surfaces and a preset correction amount, enabling the initial correction amount to be determined with high efficiency and accuracy.

[0078] The width direction of the electrode substrate can also be referred to as the transverse direction (TD).

[0079] Since there can be multiple first target distances and multiple second target distances, there can also be multiple first misalignment values, and the number of first misalignment values ​​is the same as the number of first distances and second distances.

[0080] Continue to refer to Figure 2 .from Figure 2 As can be seen from the data, the first target distances on surface A are AL1, AL2, AL3 and AL4, and the corresponding second distances on surface B are BL1, BL2, BL3 and BL4. Therefore, the first misalignment value set includes four first misalignment values, namely a = AL1-BL1, b = AL2-BL2, c = AL3-BL3, and c = AL4-BL4.

[0081] The preset correction amount can be determined based on at least one of the following parameters: national standards, company standards, or industry standards, the maximum allowable misalignment of the electrode A and B sides coating in battery manufacturing, empirical values, and on-site manufacturing requirements.

[0082] Normally, during normal manufacturing, the first misalignment value can range from -1mm to 1mm. Furthermore, excessive correction may lead to strip breakage in the electrode substrate. Moreover, the correction accuracy is typically 0.1mm during the correction process. Therefore, in this embodiment, at least one preset correction amount may include at least one of the following correction amounts: -0.1mm, 0.1mm, -0.2mm, 0.2mm, -0.3mm, 0.3mm, -0.4mm, 0.4mm, -0.5mm, and 0.5mm.

[0083] It should be noted that the "+" and "-" in the preset correction amount are not particularly limited in this application embodiment. If "+" indicates correction along the TD direction towards the first direction, such as correction to the left, then "-" indicates correction along the TD direction towards the opposite direction to the first direction, such as correction to the right. If "+" indicates correction along the TD direction towards the opposite direction to the first direction, such as correction to the right, then "-" indicates correction along the TD direction towards the first direction, such as correction to the left.

[0084] The above technical solution sets at least one preset correction amount to at least one of -0.1mm, 0.1mm, -0.2mm, 0.2mm, -0.3mm, 0.3mm, -0.4mm, 0.4mm, -0.5mm, and 0.5mm. This not only corrects the misalignment of the coated AB side to within the specification range, but also meets the correction accuracy of the correction mechanism and reduces the probability of strip breakage of the electrode substrate.

[0085] Further, in this embodiment of the application, determining the first initial correction amount among multiple initial correction amounts based on the first misalignment value and at least one preset correction amount may include: sequentially performing initial correction on the first misalignment value using at least one preset correction amount to obtain at least one set of second misalignment values, where each of the at least one set of second misalignment values ​​is a set of misalignment values ​​after performing initial correction on the first misalignment value using the same preset correction amount, and the number of at least one set of second misalignment values ​​is the same as the number of at least one preset correction amount. Then, the first initial correction amount is determined based on at least one set of second misalignment values, at least one preset correction amount, and the first misalignment value.

[0086] This technical solution first uses a preset correction amount to perform initial correction on the misalignment value between two corresponding surfaces. Then, based on the result of the initial correction, it determines the initial correction amount. This helps to eliminate unsuitable correction amounts from the preset correction amounts, reducing the computational workload of determining the initial correction amount and thus improving the efficiency of determining the initial correction amount and performing the correction. Furthermore, this technical solution employs closed-loop logic, which further improves the accuracy of the initial correction amount.

[0087] Wherein, each of the at least one second misaligned value sets may include at least one second misaligned value, and the number of at least one second misaligned value included in each second misaligned value set is the same as the number of first misaligned values.

[0088] For example, suppose at least one preset correction value includes x1, x2, x3, x4, x5, x6, x7, x8, x9, and x10. First, x1 is used to perform initial correction on a, b, c, and d, resulting in the first set of second misaligned values, which includes four second misaligned values: (a+x1), (b+x1), (c+x1), and (d+x1). Then, x2 is used to perform initial correction on a, b, c, and d, resulting in the second set of second misaligned values, which includes four second misaligned values: (a+x2), (b+x2), (c+x2), and (d+x2)... Finally, x10 is used to perform initial correction on a, b, c, and d, resulting in the tenth set of second misaligned values, which includes four second misaligned values: (a+x10), (b+x10), (c+x10), and (d+x10).

[0089] Further, determining the first initial correction amount based on at least one second misalignment value set, at least one preset correction amount, and a first misalignment value may include: selecting the second misalignment value with the largest absolute value from each of the at least one second misalignment value set; then determining a second target misalignment value, where the second target misalignment value is the misalignment value among the at least one second misalignment value with the largest absolute value that is smaller than the first target misalignment value; and the first target misalignment value is the misalignment value with the largest absolute value in the first misalignment value set. Then, based on the first preset correction amount among the at least one preset correction amount, the first initial correction amount is determined, where the first preset correction amount includes the preset correction amount corresponding to the second target misalignment value.

[0090] During the correction process, if using a certain correction amount to correct a misaligned value results in an absolute misalignment that is larger than before correction—meaning the correction worsens the misalignment—then that correction amount is unsuitable. Therefore, the above technical solution selects misalignment values ​​after initial correction whose absolute values ​​are smaller than before correction, and determines the initial correction amount based on the selected misalignment value, thus discarding unsuitable correction amounts. This not only reduces the probability of the correction worsening the misalignment, but also ensures that the number of suitable correction amounts selected is less than the initially preset number, effectively reducing the time spent determining the initial correction amount and improving efficiency.

[0091] To continue with the example, in the first set of second misaligned values, we select the second misaligned value with the largest absolute value, i.e., h1 = max(|a+x1|、|b+x1|、|c+x1|、|d+x1|). In the second set of second misaligned values, we select the second misaligned value with the largest absolute value, i.e., h2 = max(|a+x2|、|b+x2|、|c+x2|、|d+x2|)... and in the tenth set of second misaligned values, we select the second misaligned value with the largest absolute value, i.e., h10 = max(|a+x10|、|b+x10|、|c+x10|、|d+x10|).

[0092] Then, select the misalignment value with the largest absolute value from the first misalignment value set and define it as the first target misalignment value, i.e., the first target misalignment value f = max(|a|, |b|, |c|, |d|).

[0093] Then, select the misalignment value less than f from h1, h2, h3...h10. Assuming that h1, h3, h6 and h8 are less than f, the preset correction values ​​corresponding to h1, h3, h6 and h8 are x1, x3, x6 and x8 respectively. x1, x3, x6 and x8 are collectively referred to as the first preset correction value.

[0094] The first preset correction value can be multiple or a single value.

[0095] When the number of the first preset correction amount is one, the first preset correction amount can be determined as the first preset correction amount.

[0096] The above technical solution, when the number of the first preset correction amount is one, determines the first preset correction amount as the initial correction amount, which not only greatly reduces the computational complexity, but also has a high accuracy in determining the initial correction amount.

[0097] When there are multiple first preset correction values, a set of misaligned values ​​after initial correction of the first misaligned value using the first preset correction value can be selected from the second misaligned value set to obtain at least one second target misaligned value set. Then, the first initial correction value is determined based on the second misaligned value included in each second target misaligned value set in the at least one second target misaligned value set.

[0098] This technical solution determines the initial correction amount based on the misalignment value obtained after initial correction of the misalignment value between two surfaces using an appropriate correction amount, which can greatly improve the accuracy of the determined initial correction amount.

[0099] To illustrate further, the first set of second-target misalignment values ​​includes the misalignment values ​​obtained after initial correction of a, b, c, and d using x1. That is, the first set of second-target misalignment values ​​includes misalignment values ​​a1, b1, c1, and d1, where a1 = a + x1, b1 = b + x1, c1 = c + x1, and d1 = d + x1. The second set of second-target misalignment values ​​includes the misalignment values ​​obtained after initial correction of a, b, c, and d using x3. That is, the second set of second-target misalignment values ​​includes misalignment values ​​a2, b2, c2, and d2, where a2 = a + x3, b2 = b + x3, c2 = c + x3, and d1 = d + x3. The third set of second-target misalignment values ​​includes the misalignment values ​​obtained after initial correction of a, b, c, and d using x6. Specifically, the third set of second-target misalignment values ​​includes misalignment values ​​a3, b3, c3, and d3, where a3 = a + x6, b3 = b + x6, c3 = c + x6, and d3 = d + x6. The fourth set of second-target misalignment values ​​includes the misalignment values ​​obtained after initial correction of a, b, c, and d using x8. Specifically, the fourth set of second-target misalignment values ​​includes four misalignment values ​​a4, b4, c4, and d4, where a4 = a + x8, b4 = b + x8, c4 = c + x8, and d4 = d + x8.

[0100] Then, the second misaligned values ​​included in each second target misaligned value set can be added together to obtain at least one sum of misaligned values. The first preset correction amount corresponding to the sum of the misaligned values ​​with the smallest absolute value among the at least one sum of misaligned values ​​is determined as the first initial correction amount.

[0101] The above technical solution, based on the rule that the sum of the errors approaches zero after correction (i.e., the smaller the sum, the better), determines the preset correction amount corresponding to the sum of the errors with the smallest absolute value among the sums of the errors as the initial correction amount. The accuracy of the initial correction amount determined in this way is relatively high, and the accuracy of the target correction amount determined based on the initial correction amount is also relatively high. This results in a better effect after correction based on the target correction amount, further improving the performance of the battery.

[0102] Specifically, after adding the second misaligned values ​​in each set of second target misaligned values, we get the sum of four misaligned values, namely y1=a1+b1+c1+d1, y2=a2+b2+c2+d2, y3=a3+b3+c3+d3, and y4=a4+b4+c4+d4.

[0103] Then, the first initial offset can be determined based on the sum of the four misalignment values.

[0104] As an example, the first preset correction amount corresponding to the sum of the four misalignment values ​​with the smallest absolute value can be determined as the first initial correction amount. For example, if min(|y1|、|y2|、|y3|、|y4|)=y2, then the first initial offset is x3.

[0105] As another example, the sum of each of the four misaligned values ​​can be averaged, and the first preset correction amount corresponding to the average with the smallest absolute value among the averages is the first initial correction amount.

[0106] The following describes a specific implementation method for determining the first initial correction value using a concrete example.

[0107] Assume the first misalignment value set includes four first misalignment values, which are 0.05mm, 0.2mm, 0.15mm and -0.5mm respectively, and the preset correction amount includes -0.1mm, 0.1mm, -0.2mm, 0.2mm, -0.3mm, 0.3mm, -0.4mm, 0.4mm, -0.5mm and 0.5mm.

[0108] First, 10 preset correction values ​​are used to correct the four first misalignment values ​​in sequence, and the second misalignment value with the largest absolute value is selected from each set of second misalignment values ​​obtained.

[0109] Specifically, after correcting the four first misalignment values ​​using -0.1mm, the first set of second misalignment values ​​is obtained: k1 = (-0.05mm, 0.1mm, 0.05mm, -0.6mm), and h1 = max(|-0.05mm|、|0.1mm|、|0.05mm|、|-0.6mm|) = 0.6mm.

[0110] After correcting the four first misalignment values ​​using 0.1mm, the second set of second misalignment values ​​is obtained: k2 = (0.15mm, 0.3mm, 0.25mm, -0.4mm), and h2 = max(|0.15mm|、|0.3mm|、|0.25mm|、|-0.4mm|) = 0.4mm.

[0111] After correcting the four first misalignment values ​​using -0.2mm, the third set of second misalignment values ​​is obtained: k3 = (-0.15mm, 0mm, -0.05mm, -0.7mm), and h3 = max(|-0.15mm|、|0mm|、|-0.05mm|、|-0.7mm|) = 0.7mm.

[0112] After correcting the four first misalignment values ​​using 0.2mm, the fourth set of second misalignment values ​​is obtained: k4 = (0.25mm, 0.4mm, 0.35mm, -0.3mm), and h4 = max(|0.25mm|、|0.4mm|、|0.35mm|、|-0.3mm|) = 0.4mm.

[0113] After correcting the four first misalignment values ​​using -0.3mm, the fifth set of second misalignment values ​​is obtained: k5 = (-0.25mm, -0.1mm, -0.15mm, -0.8mm), and h5 = max(|-0.25mm|、|-0.1mm|、|-0.15mm|、|-0.8mm|) = 0.8mm.

[0114] After correcting the four first misalignment values ​​using 0.3mm, the sixth set of second misalignment values ​​is obtained: k6 = (0.35mm, 0.5mm, 0.45mm, -0.2mm), and h6 = max(|0.35mm|、|0.5mm|、|-0.45mm|、|-0.2mm|) = 0.5mm.

[0115] After correcting the four first misalignment values ​​using -0.4mm, the seventh set of second misalignment values ​​is obtained: k7 = (-0.35mm, -0.2mm, -0.25mm, -0.9mm), and h7 = max(|-0.35mm|、|-0.2mm|、|-0.25mm|、|-0.9mm|) = 0.9mm.

[0116] After correcting the four first misalignment values ​​using 0.4mm, the eighth second misalignment value set k8 = (0.45mm, 0.6mm, 0.55mm, -0.1mm) is obtained, and h8 = max(|0.45mm|、|0.6mm|、|0.55mm|、|-0.1mm|) = 0.6mm.

[0117] After correcting the four first misalignment values ​​using -0.5mm, the ninth second misalignment value set k9 = (-0.45mm, -0.3mm, -0.35mm, -1mm) is obtained, and h9 = max(|-0.45mm|、|-0.3mm|、|-0.35mm|、|-1mm|) = 1mm.

[0118] After correcting the four first misalignment values ​​using 0.5mm, the tenth second misalignment value set k10 = (0.55mm, 0.7mm, 0.65mm, 0mm) is obtained, and h10 = max(|-0.55mm|、|0.7mm|、|0.65mm|、|0mm|) = 0.7mm.

[0119] Secondly, determine the first target misalignment value f = max(|0.05mm|, |0.2mm|, |0.15mm|, |-0.5mm|) = 0.5mm in the first misalignment value set.

[0120] It can be seen that h1, h3, h5, h7, h8, h9, and h10 are all greater than f, indicating that the result of correcting based on the preset correction amounts of -0.1mm, -0.2mm, -0.3mm, -0.4mm, 0.4mm, -0.5mm, and 0.5mm corresponding to h1, h3, h5, h7, h8, h9, and h10 is that the correction results in more deviation, and the misalignment size of the AB coating after correction is larger than that before correction. Therefore, the preset correction amounts of -0.1mm, -0.2mm, -0.3mm, -0.4mm, 0.4mm, -0.5mm, and 0.5mm corresponding to h1, h3, h5, h7, h8, h9, and h10 are abandoned. The preset correction amounts of 0.1mm, 0.2mm, and 0.3mm corresponding to h2, h4, and h6 meet the requirements.

[0121] After correcting the four first misalignment values ​​with a correction of 0.1 mm, the resulting second misalignment values ​​are 0.15 mm, 0.3 mm, 0.25 mm, and -0.4 mm. Summing these values ​​gives y1 = 0.3 mm. After correcting the four first misalignment values ​​with a correction of 0.2 mm, the resulting second misalignment values ​​are 0.25 mm, 0.4 mm, 0.35 mm, and -0.3 mm. Summing these values ​​gives y2 = 0.7 mm. After correcting the four first misalignment values ​​with a correction of 0.3 mm, the resulting second misalignment values ​​are 0.35 mm, 0.5 mm, 0.45 mm, and -0.2 mm. Summing these values ​​gives y3 = 1.1 mm.

[0122] Based on the rule that the correction value approaches 0, meaning the smaller the sum, the better, the initial correction amount was ultimately determined to be 0.1 mm.

[0123] It should be noted that the determination process of other initial correction quantities in the initial correction quantities is the same as that of the first initial correction quantity, and will not be repeated here for the sake of brevity.

[0124] After determining multiple initial correction values, the target correction value can be determined based on these initial correction values.

[0125] As mentioned earlier, the average of multiple initial correction values ​​can be used to determine the target correction value.

[0126] Alternatively, considering that the correction mechanism may have a correction coefficient for itself, the target correction amount can be the product of the intermediate correction amount obtained based on the multiple initial correction amounts and the correction coefficient. Optionally, the correction coefficient can be less than 1. For example, if the correction coefficient is 0.8 and the average value of the multiple initial correction amounts is 0.5mm, then the target correction amount = 0.5mm * 0.8 = 0.4mm.

[0127] Furthermore, correction information can be sent to the correction agency, which indicates the target correction amount.

[0128] If the correction mechanism has not set a correction coefficient, the correction information may include the target correction amount.

[0129] If the correction mechanism is equipped with the correction coefficient, the correction information can include the target correction amount. Thus, after receiving the target correction amount, the correction mechanism can multiply the target correction amount by the correction coefficient and use the resulting product to adjust the electrode substrate or coating die head, ensuring that the coating misalignment on the A and B sides is within the specified range.

[0130] Alternatively, the correction information can include the product of the target correction amount and the correction coefficient. In this way, after receiving the correction information, the correction mechanism can directly use the received product to adjust the electrode substrate or coating die.

[0131] After the correction mechanism has adjusted the electrode substrate or coating die, it can send a response message indicating that the correction of the electrode substrate or coating die has been completed.

[0132] To confirm the effectiveness of this correction, after receiving the response information, it can be determined whether the misalignment value between each corrected first distance and the corresponding second distance is within the preset range.

[0133] Specifically, within a sampling period, multiple corrected first distances and multiple corrected second distances can be obtained, and then the misalignment value can be determined based on these multiple corrected first distances and multiple corrected second distances to determine whether it is within a preset range.

[0134] From receiving the response information to determining whether the misalignment value after correction is within the preset range, the transmission distance of the electrode substrate can be L. Here, L can be called the correction cycle. Typically, L can be, for example, the mechanical distance from the correction mechanism to the CCD camera.

[0135] Optionally, communication with the correction mechanism can be achieved via wired or wireless means. Wired communication methods may include, for example, control area network (CAN) communication and daisy chain communication. Wireless communication methods may include, for example, Bluetooth communication, wireless fidelity (WIFI) communication, ZigBee communication, and various other methods, and are not limited thereto.

[0136] The above technical solution, after the correction is completed, judges the correction effect by information interaction with the correction mechanism. This is not only easy to implement, but also reduces the probability that the misalignment value between the first distance and the corresponding second distance is still not within the preset range due to poor correction effect, which would lead to poor battery performance.

[0137] To more clearly describe the embodiments of this application, the following is combined with... Figure 3 A detailed description of a specific implementation process of method 100 is provided. Figure 3 If the material in the sample is a one-outlet-four-material sample, then the number of the first distance, the second distance, and the first misalignment value are all 4. One sampling period consists of 20 frames.

[0138] In step 310, multiple first distances and multiple second distances are obtained.

[0139] The multiple first distances and multiple second distances can be acquired by a CCD camera.

[0140] In step 320, the misalignment value between the first distance and the second distance in the current frame is determined.

[0141] In step 330, the initial correction amount is calculated based on the misalignment value of the current frame.

[0142] In step 340, the initial correction amount of 20 consecutive frames of images is determined.

[0143] In step 350, the target correction amount is determined based on the initial correction amount.

[0144] Specifically, the initial correction amount for 20 frames is averaged. If the average has a decimal point, it is rounded and only one decimal place is calculated to obtain the intermediate correction amount. The intermediate correction amount is then multiplied by the correction coefficient to obtain the target correction amount.

[0145] In step 360, correction information, including the target correction amount, is sent to the correction mechanism.

[0146] In step 370, a response message sent by the correction mechanism is received, which indicates that the correction of the electrode substrate or coating die has been completed.

[0147] In step 380, the first and second distances after correction are acquired from 20 frames of images.

[0148] In step 390, based on the first and second distances after correction of the 20 frames of images, it is determined whether the misalignment value between each first distance and the corresponding second distance is within a preset range.

[0149] If the result is within the preset range, the correction effect is good, and the correction process ends. If the result is outside the preset range, proceed to step 320.

[0150] In the embodiments of this application, the order of the above-mentioned process numbers does not imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this application.

[0151] Furthermore, without conflict, the various embodiments and / or technical features described in this application can be arbitrarily combined with each other, and the resulting technical solutions should also fall within the protection scope of this application.

[0152] The coating correction method according to the embodiments of this application has been described in detail above. The coating correction apparatus according to the embodiments of this application will now be described. It should be understood that the coating correction apparatus in the embodiments of this application can execute the coating correction method in the embodiments of this application.

[0153] Figure 4 A schematic block diagram of a coating correction apparatus 400 according to an embodiment of this application is shown. Figure 4 As shown, the coating correction device 400 may include:

[0154] The acquisition unit 410 is used to acquire a plurality of first distances and a plurality of second distances, wherein each of the plurality of first distances is the distance from the edge of the coating area on the first surface of the electrode substrate to the reference edge, and each of the plurality of second distances is the distance from the edge of the coating area on the second surface of the electrode substrate to the reference edge. The plurality of first distances and the plurality of second distances are obtained by sampling multiple times within a sampling period.

[0155] The determining unit 420 is used to determine the target correction amount in the coating process based on a plurality of first distances, a plurality of second distances and at least one preset correction amount.

[0156] Optionally, in this embodiment of the application, the determining unit 420 is specifically used to: determine a plurality of initial correction amounts based on each first distance, a second distance corresponding to each first distance, and at least one preset correction amount; and determine a target correction amount based on the plurality of initial correction amounts.

[0157] Optionally, in this embodiment of the application, the determining unit 420 is specifically used to: determine the target correction amount based on the average value of multiple initial correction amounts.

[0158] Optionally, in this embodiment of the application, the plurality of first distances include a first target distance, and the plurality of second distances include a second target distance. The first target distance and the second target distance are distances obtained in the same sampling. The determining unit 420 is specifically used to: determine a first misalignment value set based on the first target distance and the second target distance. The first misalignment value set includes a first misalignment value between the edge of the coating area on at least one first surface and the edge of the coating area on the corresponding second surface in the width direction of the electrode substrate; and determine a first initial correction amount among a plurality of initial correction amounts based on the first misalignment value and at least one preset correction amount.

[0159] Optionally, in this embodiment of the application, the coating correction device 400 may further include: a correction unit, configured to perform initial correction on a first misalignment value sequentially using at least one preset correction amount to obtain at least one set of second misalignment values, wherein each set of second misalignment values ​​is a set of misalignment values ​​after initial correction on the first misalignment value using the same preset correction amount, and the number of at least one set of second misalignment values ​​is the same as the number of at least one preset correction amount; and a determination unit 420 is specifically configured to: determine a first initial correction amount based on at least one set of second misalignment values, at least one preset correction amount, and the first misalignment value.

[0160] Optionally, in this embodiment, each of the at least one set of second misaligned values ​​includes at least one second misaligned value. The coating correction device 400 may further include: a selection unit, configured to select the second misaligned value with the largest absolute value from each of the at least one set of second misaligned values; and a determination unit 420, specifically configured to: determine a second target misaligned value, wherein the second target misaligned value is a misaligned value less than a first target misaligned value among the at least one second misaligned value with the largest absolute value, and the first target misaligned value is the misaligned value with the largest absolute value in the first set of misaligned values; and determine a first initial correction amount based on a first preset correction amount among at least one preset correction amount, wherein the first preset correction amount includes the preset correction amount corresponding to the second target misaligned value.

[0161] Optionally, in this embodiment of the application, when there are multiple first preset correction amounts, the selection unit is specifically used to: select, from the second misalignment value set, a misalignment value set after initial correction of the first misalignment value using the first preset correction amount, so as to obtain at least one second target misalignment value set; the determination unit 420 is specifically used to: determine the first initial correction amount based on the second misalignment value included in each second target misalignment value set in the at least one second target misalignment value set.

[0162] Optionally, in this embodiment of the application, the determining unit 420 is specifically used to: add the second misalignment values ​​included in each second target misalignment value set to obtain at least one sum of misalignment values; and determine the first preset correction amount corresponding to the sum of the misalignment values ​​with the smallest absolute value among the at least one sum of misalignment values ​​as the first initial correction amount.

[0163] Optionally, in this embodiment of the application, when the number of the first preset correction amount is one, the determining unit 420 is specifically used to: determine the first preset correction amount as the first initial correction amount.

[0164] Optionally, in this embodiment of the application, the coating correction device 400 further includes: a communication unit, configured to send correction information to the correction mechanism, the correction information indicating a target correction amount; the communication unit is also configured to receive response information sent by the correction mechanism, the response information indicating that the correction of the electrode substrate or coating die has ended; and a judgment unit, configured to, in response to the response information, determine whether the misalignment value between each first distance and the corresponding second distance after correction is within a preset range.

[0165] Optionally, in the embodiments of this application, at least one preset correction amount includes at least one of the following correction amounts: -0.1mm, 0.1mm, -0.2mm, 0.2mm, -0.3mm, 0.3mm, -0.4mm, 0.4mm, -0.5mm, and 0.5mm.

[0166] It should be understood that the coating correction device 400 can perform the corresponding operations in method 100, and for the sake of simplicity, it will not be described in detail here.

[0167] Figure 5 This is a schematic diagram of the hardware structure of a coating correction device 500 according to an embodiment of this application. The coating correction device 500 includes a memory 501, a processor 502, a communication interface 503, and a bus 504. The memory 501, processor 502, and communication interface 503 are interconnected via the bus 504.

[0168] The memory 501 may be a read-only memory (ROM), a static storage device, or a random access memory (RAM). The memory 501 may store a program, and when the program stored in the memory 501 is executed by the processor 502, the processor 502 and the communication interface 503 are used to execute the various steps of the coating correction method of the embodiments of this application.

[0169] The processor 502 may be a general-purpose central processing unit (CPU), microprocessor, application-specific integrated circuit (ASIC), graphics processing unit (GPU), or one or more integrated circuits, used to execute relevant programs to achieve the functions required by the units in the apparatus of this application embodiment, or to execute the coating correction method of this application embodiment.

[0170] The processor 502 can also be an integrated circuit chip with signal processing capabilities. In implementation, each step of the coating correction method in this embodiment can be completed by the integrated logic circuitry in the processor 502 or by software instructions.

[0171] The processor 502 described above can also be a general-purpose processor, a digital signal processor (DSP), an 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 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. The steps of the methods disclosed in the embodiments of this application can be directly implemented by the hardware processor, or implemented by a combination of hardware and software modules in the processor. The software modules can be located in random access memory, flash memory, read-only memory, programmable read-only memory, electrically erasable programmable memory, registers, or other mature storage media in the art. This storage medium is located in memory 501. The processor 502 reads the information in memory 501 and, in conjunction with its hardware, completes the functions required by the units included in the coating correction device 500 of the embodiments of this application, or executes the coating correction method of the embodiments of this application.

[0172] The communication interface 503 uses a transceiver device, such as, but not limited to, a transceiver, to enable communication between the coating correction device 500 and other devices or communication networks.

[0173] Bus 504 may include a pathway for transmitting information between various components of the coating correction apparatus 500 (e.g., memory 501, processor 502, communication interface 503).

[0174] It should be noted that although the above-described coating correction device 500 only shows a memory, processor, and communication interface, those skilled in the art should understand that in specific implementations, the coating correction device 500 may also include other devices necessary for normal operation. Furthermore, depending on specific needs, those skilled in the art should understand that the coating correction device 500 may also include hardware devices for implementing other additional functions. In addition, those skilled in the art should understand that the coating correction device 500 may only include the devices necessary for implementing the embodiments of this application, and may not necessarily include... Figure 5 All the devices shown.

[0175] This application also provides a computer-readable storage medium for storing a computer program for performing the methods described in the various embodiments of this application.

[0176] The aforementioned computer-readable storage medium may be a transient computer-readable storage medium or a non-transitory computer-readable storage medium.

[0177] This application also provides a computer program product, which includes a computer program stored on a computer-readable storage medium. The computer program includes program instructions that, when executed by a computer, cause the computer to perform the above-described coating correction method.

[0178] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features. However, these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A method for coating correction, characterized in that, The method includes: Multiple first distances and multiple second distances are obtained, wherein each of the multiple first distances is the distance from the edge of the coating area on the first surface of the electrode substrate to a reference edge, and each of the multiple second distances is the distance from the edge of the coating area on the second surface of the electrode substrate to the reference edge. The multiple first distances and multiple second distances are obtained by sampling multiple times within a sampling period. The reference edge includes two edges of the electrode substrate along its length direction, the two edges including a first edge and a second edge. The first distance includes at least one first sub-distance and at least one second sub-distance, and the second distance includes at least one third sub-distance. The first sub-distance is the distance from the edge of the coating area near the first edge of the first surface of the electrode substrate to the first edge along the width direction; the second sub-distance is the distance from the edge of the coating area near the second edge of the first surface of the electrode substrate to the second edge along the width direction; the third sub-distance is the distance from the edge of the coating area near the first edge of the second surface of the electrode substrate to the first edge along the width direction; and the fourth sub-distance is the distance from the edge of the coating area near the second edge of the second surface of the electrode substrate to the second edge along the width direction. A first misalignment value set is determined based on each first sub-distance and each corresponding third sub-distance, and based on each second sub-distance and each corresponding fourth sub-distance. The first misalignment value set includes a first misalignment value between at least one coating area edge on the first surface and a corresponding coating area edge on the second surface in the width direction. The target correction amount during the coating process is determined based on the first misalignment value and at least one preset correction amount.

2. The method according to claim 1, characterized in that, Determining the target correction amount during the coating process based on the first misalignment value and at least one preset correction amount includes: Based on the first misalignment value and the at least one preset correction amount, a plurality of initial correction amounts are determined; The target correction amount is determined based on the plurality of initial correction amounts.

3. The method according to claim 2, characterized in that, Determining the target correction amount based on the plurality of initial correction amounts includes: The target correction amount is determined based on the average of the plurality of initial correction amounts.

4. The method according to claim 2 or 3, characterized in that, The plurality of initial correction values ​​includes a first initial correction value. Determining the plurality of initial correction values ​​based on the first misalignment value and the at least one preset correction value includes: Using the at least one preset correction amount, the first misaligned value is initially corrected sequentially to obtain at least one set of second misaligned values. Each set of second misaligned values ​​is a set of misaligned values ​​after the first misaligned value has been initially corrected using the same preset correction amount. The number of the at least one set of second misaligned values ​​is the same as the number of the at least one preset correction amount. The first initial correction amount is determined based on the at least one second misalignment value set, the at least one preset correction amount, and the first misalignment value.

5. The method according to claim 4, characterized in that, Each of the at least one set of second misaligned values ​​includes at least one second misaligned value. Determining the first initial correction amount based on the at least one set of second misaligned values, the at least one preset correction amount, and the first misaligned value includes: In each of the at least one set of second misaligned values, select the second misaligned value with the largest absolute value; A second target misalignment value is determined, wherein the second target misalignment value is a misalignment value that is less than the first target misalignment value among at least one of the second misalignment values ​​with the largest absolute value, and the first target misalignment value is the misalignment value with the largest absolute value in the first set of misalignment values; Based on the first preset correction amount among the at least one preset correction amount, the first initial correction amount is determined, wherein the first preset correction amount includes the preset correction amount corresponding to the second target misalignment value.

6. The method according to claim 5, characterized in that, When there are multiple first preset correction values, determining the first initial correction value based on the first preset correction value among the at least one preset correction value includes: In the second set of misaligned values, a set of misaligned values ​​after initial correction of the first misaligned value using the first preset correction amount is selected to obtain at least one second target set of misaligned values. The first initial correction amount is determined based on the second misalignment value included in each of the at least one second target misalignment value sets.

7. The method according to claim 6, characterized in that, Determining the first initial correction amount based on the second misalignment value included in each of the at least one second target misalignment value sets includes: The second misaligned values ​​included in each set of second target misaligned values ​​are added together to obtain at least one sum of misaligned values; The first preset correction amount corresponding to the sum of the at least one misalignment values ​​with the smallest absolute value is determined as the first initial correction amount.

8. The method according to claim 5, characterized in that, When the number of the first preset correction values ​​is one, determining the first initial correction value based on the first preset correction value among the at least one preset correction values ​​includes: The first preset correction amount is determined as the first initial correction amount.

9. The method according to any one of claims 1 to 3, characterized in that, The method further includes: Send correction information to the correction agency, the correction information being used to indicate the target correction amount; Receive response information sent by the correction mechanism, the response information being used to indicate that the correction of the electrode substrate or coating die head has ended; In response to the response information, it is determined whether the misalignment value between each first distance and the corresponding second distance after correction is within a preset range.

10. The method according to any one of claims 1 to 3, characterized in that, The at least one preset correction amount includes at least one of the following correction amounts: -0.1mm, 0.1mm, -0.2mm, 0.2mm, -0.3mm, 0.3mm, -0.4mm, 0.4mm, -0.5mm, and 0.5mm.

11. A coating correction device, characterized in that, include: An acquisition unit is configured to acquire a plurality of first distances and a plurality of second distances, wherein each of the plurality of first distances is the distance from the edge of the coating area on the first surface of the electrode substrate to a reference edge, and each of the plurality of second distances is the distance from the edge of the coating area on the second surface of the electrode substrate to the reference edge. The plurality of first distances and the plurality of second distances are obtained by sampling multiple times within a sampling period. The reference edge includes two edges of the electrode substrate along its length direction, the two edges including a first edge and a second edge. The first distance includes at least one first sub-distance and at least one second sub-distance, and the second distance includes at least one... A third sub-distance and at least one fourth sub-distance, wherein the first sub-distance is the distance from the edge of the coating area near the first edge of the first surface of the electrode substrate to the first edge along the width direction; the second sub-distance is the distance from the edge of the coating area near the second edge of the first surface of the electrode substrate to the second edge along the width direction; the third sub-distance is the distance from the edge of the coating area near the first edge of the second surface of the electrode substrate to the first edge along the width direction; and the fourth sub-distance is the distance from the edge of the coating area near the second edge of the second surface of the electrode substrate to the second edge along the width direction. The determining unit is configured to determine a first misalignment value set based on each first sub-distance and each corresponding third sub-distance, and based on each second sub-distance and each corresponding fourth sub-distance, and to determine a target correction amount in the coating process based on the first misalignment value and at least one preset correction amount. The first misalignment value set includes a first misalignment value between the edge of the coating area on at least one first surface and the edge of the coating area on the corresponding second surface in the width direction.

12. The apparatus according to claim 11, characterized in that, The determining unit is specifically used for: Based on the first misalignment value and the at least one preset correction amount, a plurality of initial correction amounts are determined; The target correction amount is determined based on the plurality of initial correction amounts.

13. The apparatus according to claim 12, characterized in that, The determining unit is specifically used for: The target correction amount is determined based on the average of the plurality of initial correction amounts.

14. The apparatus according to claim 12 or 13, characterized in that, The plurality of initial correction values ​​includes a first initial correction value, and the device further includes: The correction unit is used to perform initial correction on the first misaligned value sequentially using the at least one preset correction amount to obtain at least one set of second misaligned values. Each set of second misaligned values ​​is a set of misaligned values ​​after the first misaligned value has been initially corrected using the same preset correction amount. The number of the at least one set of second misaligned values ​​is the same as the number of the at least one preset correction amount. The determining unit is specifically used for: The first initial correction amount is determined based on the at least one second misalignment value set, the at least one preset correction amount, and the first misalignment value.

15. The apparatus according to claim 14, characterized in that, The device further includes: The selection unit is used to select the second misaligned value with the largest absolute value in each of the at least one set of second misaligned values; The determining unit is specifically used for: A second target misalignment value is determined, wherein the second target misalignment value is a misalignment value that is less than the first target misalignment value among at least one of the second misalignment values ​​with the largest absolute value, and the first target misalignment value is the misalignment value with the largest absolute value in the first set of misalignment values; Based on the first preset correction amount among the at least one preset correction amount, the first initial correction amount is determined, wherein the first preset correction amount includes the preset correction amount corresponding to the second target misalignment value.

16. The apparatus according to claim 15, characterized in that, When there are multiple first preset correction values, the selection unit is specifically used for: In the second set of misaligned values, a set of misaligned values ​​after initial correction of the first misaligned value using the first preset correction amount is selected to obtain at least one second target set of misaligned values. The determining unit is specifically used for: The first initial correction amount is determined based on the second misalignment value included in each of the at least one second target misalignment value sets.

17. The apparatus according to claim 16, characterized in that, The determining unit is specifically used for: The second misaligned values ​​included in each set of second target misaligned values ​​are added together to obtain at least one sum of misaligned values; The first preset correction amount corresponding to the sum of the at least one misalignment values ​​with the smallest absolute value is determined as the first initial correction amount.

18. The apparatus according to claim 15, characterized in that, When the number of the first preset correction amount is one, the determining unit is specifically used for: The first preset correction amount is determined as the first initial correction amount.

19. The apparatus according to any one of claims 11 to 13, characterized in that, The device further includes: A communication unit is used to send correction information to the correction mechanism, wherein the correction information is used to indicate the target correction amount; The communication unit is also used to receive response information sent by the correction mechanism, the response information being used to indicate that the correction of the electrode substrate or coating die head has been completed; The judgment unit is used to determine, in response to the response information, whether the misalignment value between each first distance after correction and the corresponding second distance is within a preset range.

20. The apparatus according to any one of claims 11 to 13, characterized in that, The at least one preset correction amount includes at least one of the following correction amounts: -0.1mm, 0.1mm, -0.2mm, 0.2mm, -0.3mm, 0.3mm, -0.4mm, 0.4mm, -0.5mm, and 0.5mm.

21. A coating correction device, characterized in that, include: Memory, used to store programs; A processor for executing a program stored in the memory, wherein when the program stored in the memory is executed, the processor is configured to perform a coating correction method according to any one of claims 1 to 10.

22. A computer-readable storage medium, characterized in that, Used to store a computer program that causes a computer to perform the coating correction method as described in any one of claims 1 to 10.

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