Coating deviation correcting method and device

Abstract

The embodiment of the invention provides a coating deviation correction method and device. The performance of a battery can be effectively improved. The method comprises the steps that a first distance and a second distance are obtained, the first distance is the distance from the edge of a coating area on the first surface of a pole piece base material to a reference edge, and the second distance is the distance from the edge of a coating area on the second surface of the pole piece base material to the reference edge; and according to the first distance, the second distance and at least one preset deviation correction amount, the target deviation correction amount in the coating process is determined.

Description

Technical Field

[0001] The present application relates to the field of battery manufacturing technology, and in particular to a coating deviation correction method and device. Background Art

[0002] Energy conservation and emission reduction are the key to the sustainable development of the automobile industry. In this case, electric vehicles have become an important part of the sustainable development of the automobile industry due to their advantages of energy conservation and environmental protection. For electric vehicles, battery technology is an important factor in their development.

[0003] The production process of batteries is relatively complex and includes multiple processes, among which the coating process is an important link that cannot be ignored and has a crucial impact on battery performance. Summary of the invention

[0004] The embodiments of the present application provide a coating deviation correction method and device, which can effectively improve the performance of the battery.

[0005] In a first aspect, a method for coating correction is provided, the method comprising: obtaining a first distance and a second distance, wherein the first distance is the distance from the edge of a coating area on a first surface of an electrode substrate to a reference edge, and the second distance is the distance from the edge of a coating area on a second surface of the electrode substrate to the reference edge; determining a target correction amount during the coating process according to the first distance, the second distance and at least one preset correction amount.

[0006] In the embodiment of the present application, by obtaining the distance from the edge of the coating area on the two corresponding surfaces of the electrode substrate to the reference edge, the coating misalignment size between the two corresponding surfaces can be determined, and then the target correction amount in the coating process is determined based on the preset correction amount, so that the target correction amount can be determined with high efficiency and accuracy. Correction is performed based on the target correction amount, so that the coating misalignment size between the two corresponding surfaces can be within the specification range, thereby effectively improving the performance of the battery.

[0007] In some possible implementations, determining the target correction amount in the coating process based on the first distance, the second distance and the at least one preset correction amount includes: determining a first misalignment value set based on the first distance and the second distance, the first misalignment value set including a first misalignment value between at least one edge of a coating area on the first surface and a corresponding edge of a coating area on the second surface in the width direction of the electrode substrate; determining the target correction amount based on the first misalignment value and the at least one preset correction amount.

[0008] The above technical solution determines the misalignment value between two corresponding surfaces according to the first distance and the second distance, which is simple to implement and effectively reduces the complexity of implementation. Furthermore, the target correction amount is determined according to the misalignment value between the two corresponding surfaces and the preset correction amount, so that the target correction amount can be determined with high efficiency and accuracy. Correction is performed based on the target correction amount, so that the coating misalignment size between the two corresponding surfaces can be within the specification range, thereby effectively improving the performance of the battery.

[0009] In some possible implementations, determining the target correction amount based on the first misalignment value and the at least one preset correction amount includes: using the at least one preset correction amount to perform initial correction on the first misalignment values ​​in turn to obtain at least one second misalignment value set, each second misalignment value set in the at least one second misalignment value set being a misalignment value set after the first misalignment value is initially corrected using the same preset correction amount, and the number of the at least one second misalignment value set is the same as the number of the at least one preset correction amount; determining the target correction amount based on the at least one second misalignment value set, the at least one preset correction amount and the first misalignment value.

[0010] The above technical scheme first uses a preset correction amount to perform initial correction on the misalignment value between two corresponding surfaces, and then determines the final target correction amount based on the result of the initial correction, which helps to eliminate inappropriate correction amounts in the preset correction amounts, thereby reducing the amount of calculation for determining the target correction amount, and thus improving the efficiency of determining the target correction amount and performing correction.

[0011] In some possible implementations, each second misalignment value set in the at least one second misalignment value set includes at least one second misalignment value, and determining the target correction amount based on the at least one second misalignment value set, the at least one preset correction amount and the first misalignment value includes: selecting the second misalignment value with the largest absolute value in each second misalignment value set in the at least one second misalignment value set; determining a second target misalignment value, the second target misalignment value being a misalignment value that is smaller than the first target misalignment value in at least one second misalignment value with the largest absolute value, the first target misalignment value being the misalignment value with the largest absolute value in the first misalignment value set; determining the target correction amount based on a first preset correction amount in the at least one preset correction amount, the first preset correction amount including the preset correction amount corresponding to the second target misalignment value.

[0012] During the correction process, if the absolute value of the misalignment value after correction by a certain correction amount is larger than that before correction, that is, the more correction, the more deviation, then the correction amount is inappropriate. Therefore, the above technical solution selects the misalignment value after the initial correction whose absolute value is smaller than the misalignment value before correction, and determines the target correction amount based on the correction amount corresponding to the selected misalignment value, that is, abandons the inappropriate correction amount. In this way, not only the probability of more deviation is reduced, but also the number of appropriate correction amounts selected may be less than the number of correction amounts preset at the beginning, which effectively reduces the time spent on determining the target correction amount and improves efficiency.

[0013] In some possible implementations, when there are multiple first preset correction amounts, determining the target correction amount based on a first preset correction amount among the at least one preset correction amount includes: selecting a misalignment value set in the second misalignment value set after initial correction of the first misalignment value using the first preset correction amount to obtain at least one second target misalignment value set; and determining the target 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.

[0014] The above technical solution determines the target correction amount based on the misalignment value after initial correction of the misalignment value between two surfaces using a suitable correction amount, which can greatly improve the accuracy of the determined target correction amount.

[0015] In some possible implementations, determining the target 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 includes: adding the second misalignment values ​​included in each second target misalignment value set to obtain at least one sum of misalignment values; and determining the first preset correction amount corresponding to the sum of misalignment values ​​with the smallest absolute value in the at least one sum of misalignment values ​​as the target correction amount.

[0016] The above technical scheme, according to the rule that the sum approaches 0 after correction, that is, the smaller the better, determines the preset correction amount corresponding to the sum of the misalignment values ​​with the smallest absolute value in the sum of the misalignment values ​​as the target correction amount. The accuracy of the target correction amount determined in this way is higher, and the effect of correction based on the target correction amount is better, thereby further improving the performance of the battery.

[0017] In some possible implementations, when the number of the first preset correction amounts is one, determining the target 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 target correction amount.

[0018] In the above technical solution, when the number of the first preset correction amount is one, the first preset correction amount is determined as the target correction amount, which not only greatly reduces the calculation complexity but also has a higher accuracy rate in determining the target correction amount.

[0019] In some possible implementations, the at least one preset correction amount includes at least one of the following correction amounts: -0.1 mm, 0.1 mm, -0.2 mm, 0.2 mm, -0.3 mm, 0.3 mm, -0.4 mm, 0.4 mm, -0.5 mm, and 0.5 mm.

[0020] 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. While correcting the misalignment of the coated AB surface within the specification range, it also meets the correction accuracy of the correction mechanism and reduces the probability of tape breakage of the electrode substrate.

[0021] In a second aspect, a coating correction device is provided, comprising: an acquisition unit for acquiring a first distance and a second distance, wherein the first distance is the distance from the edge of the coating area on the first surface of the pole piece 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 pole piece substrate to the reference edge; a determination unit for determining a target correction amount in the coating process based on the first distance, the second distance and at least one preset correction amount.

[0022] In some possible implementations, the determination unit is specifically used to: determine a first misalignment value set based on the first distance and the second distance, the first misalignment value set including a first misalignment value between at least one edge of a coating area on the first surface and a corresponding edge of a coating area on the second surface in the width direction of the pole piece substrate; determine the target correction amount based on the first misalignment value and the at least one preset correction amount.

[0023] In some possible implementations, the device also includes: a correction unit, used to use the at least one preset correction amount to perform initial correction on the first misalignment values ​​in sequence to obtain at least one second misalignment value set, each second misalignment value set in the at least one second misalignment value set is a misalignment value set after the first misalignment value is initially corrected using the same preset correction amount, and the number of the at least one second misalignment value set is the same as the number of the at least one preset correction amount; the determination unit is specifically used to: determine the target correction amount based on the at least one second misalignment value set, the at least one preset correction amount and the first misalignment value.

[0024] In some possible implementations, each second misalignment value set in the at least one second misalignment value set includes at least one second misalignment value, and the device also includes: a selection unit, used to select the second misalignment value with the largest absolute value in each second misalignment value set in the at least one second misalignment value set; the determination unit is specifically used to: determine a second target misalignment value, the second target misalignment value is a misalignment value that is smaller than the first target misalignment value in 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; determine the target correction amount based on a first preset correction amount in the at least one preset correction amount, the first preset correction amount including the preset correction amount corresponding to the second target misalignment value.

[0025] 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 misalignment value set after initial correction of the first misalignment value using the first preset correction amount, to obtain at least one second target misalignment value set; and the determination unit is specifically used to: determine the target 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.

[0026] In some possible implementations, the determination unit is specifically used to: add the second target misalignment values ​​included in each second misalignment value set to obtain the sum of at least one misalignment value; and determine the first preset correction amount corresponding to the sum of the misalignment values ​​with the smallest absolute value in the at least one sum of the misalignment values ​​as the target correction amount.

[0027] In some possible implementations, when the number of the first preset deviation correction amount is one, the determining unit is specifically configured to: determine the first preset deviation correction amount as the target deviation correction amount.

[0028] In some possible implementations, the at least one preset correction amount includes at least one of the following correction amounts: -0.1 mm, 0.1 mm, -0.2 mm, 0.2 mm, -0.3 mm, 0.3 mm, -0.4 mm, 0.4 mm, -0.5 mm, and 0.5 mm.

[0029] In a third aspect, a coating correction device is provided, comprising a processor and a memory, wherein the memory is used to store a computer program, and the processor is used to call the computer program to execute the method in the above-mentioned first aspect or its various implementation methods.

[0030] In a fourth aspect, a computer-readable storage medium is provided for storing a computer program, wherein the computer program enables a computer to execute the method in the above-mentioned first aspect or its various implementations. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments of the present application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the drawings without paying creative work.

[0032] In the drawings, the drawings are not drawn to scale.

[0033] Figure 1 It is a schematic flow chart of a coating correction method according to an embodiment of the present application.

[0034] Figure 2 It is a schematic diagram of AB surface coating in an embodiment of the present application.

[0035] Figure 3 It is a schematic block diagram of a coating correction device according to an embodiment of the present application.

[0036] Figure 4 It is a schematic block diagram of a coating correction device according to an embodiment of the present application. DETAILED DESCRIPTION

[0037] The following detailed description and drawings of the embodiments of the present application are used to illustrate the principles of the present application, but cannot be used to limit the scope of the present application, that is, the present application is not limited to the described embodiments.

[0038] In the description of this application, it should be noted that, unless otherwise specified, "multiple" means more than two; the terms "upper", "lower", "left", "right", "inner", "outer", etc., indicating directions 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 direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting this application. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0039] Unless otherwise defined, all technical and scientific terms used in this application have the same meanings as those commonly understood by technicians in the technical field of this application; the terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned drawings and any variations thereof are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order or a primary and secondary relationship.

[0040] Reference to "embodiments" in this application means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described in this application may be combined with other embodiments.

[0041] With the development of new energy technologies, the application fields of batteries are becoming more and more extensive. For example, batteries can be used as the main power source for electrical devices (such as vehicles, ships or spacecraft, etc.). It should be understood that the battery mentioned in the embodiments of the present application refers to a single physical module including one or more battery cells to provide higher voltage and capacity.

[0042] Optionally, the battery can be a power battery. In terms of the type of battery, the battery can be a lithium-ion battery, a lithium metal battery, a lead-acid battery, a nickel-cathode battery, a nickel-hydrogen battery, a lithium-sulfur battery, a lithium-air battery or a sodium-ion battery, etc., which is not specifically limited in the embodiments of the present application. In terms of battery size, the battery in the embodiments of the present application can be a battery cell / battery monomer, or a battery module or a battery pack, which is not specifically limited in the embodiments of the present application.

[0043] The production process of batteries is relatively complex and includes multiple processes, such as stirring, coating, rolling, die-cutting, winding, injection, and formation. Among them, the coating process is an important part that cannot be ignored. Its influence on battery performance is crucial. The stability, uniformity, and size of the coating will affect the final performance of the battery. Among them, the size of the coated AB surface. Including position size, width size, AB surface misalignment size, etc., all have a great impact on the performance of the battery.

[0044] During the coating process, the coating result of the electrode may deviate due to factors such as the pressure of the coating die nozzle. When the misalignment of the AB surface of the electrode coating area exceeds a certain range, if it is not discovered and corrected in time, it may seriously affect the performance of the battery, and will also seriously increase the scrap rate of the product and increase the manufacturing cost.

[0045] Based on this, an embodiment of the present application proposes a method for coating correction, by obtaining a first distance and a second distance, and determining a target correction amount in the coating process according to the first distance, the second distance and at least one preset correction amount, wherein the first distance is the distance from the edge of the coating area on the first surface of the pole piece substrate to the reference edge, and the second distance is the distance from the edge of the coating area on the second surface of the pole piece substrate to the reference edge. In this way, by obtaining the distance from the edge of the coating area on the two corresponding surfaces of the pole piece substrate to the reference edge, the coating misalignment size between the two corresponding surfaces can be determined, and then the target correction amount in the coating process is determined based on the preset correction amount, so that the target correction amount can be determined with higher efficiency and accuracy. Correction is performed based on the target correction amount so that the coating misalignment size between the two corresponding surfaces can be within the specification range, thereby effectively improving the performance of the battery.

[0046] Figure 1 FIG. 1 is a schematic flow chart of a coating correction method 100 according to an embodiment of the present application. Figure 1 As shown, method 100 may include at least part of the following contents.

[0047] S110: Obtain a first distance and a second distance, wherein the first distance is the distance from the edge of the coating area on the first surface of the electrode substrate to the 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.

[0048] S120: Determine a target deviation correction amount during the coating process according to the first distance, the second distance and at least one preset deviation correction amount.

[0049] In the embodiment of the present application, by obtaining the distance from the edge of the coating area on the two corresponding surfaces of the electrode substrate to the reference edge, the coating misalignment size between the two corresponding surfaces can be determined, and then the target correction amount in the coating process is determined based on the preset correction amount, so that the target correction amount can be determined with high efficiency and accuracy. Correction is performed based on the target correction amount, so that the coating misalignment size between the two corresponding surfaces can be within the specification range, thereby effectively improving the performance of the battery.

[0050] The electrode substrate may include, for example, aluminum foil, and the electrode obtained based on the electrode substrate is a positive electrode. Alternatively, the electrode substrate may include, for example, copper foil, and the electrode obtained based on the electrode substrate is a negative electrode.

[0051] The coating area is the area where the slurry is coated. The first surface may be one of the surfaces on the electrode substrate where the slurry is coated, and may be the front side of the electrode substrate or the back side of the electrode substrate. The second surface may be a surface on the electrode substrate corresponding to the first surface. For example, if the first surface is the front side of the electrode substrate, the second surface is the back side of the electrode substrate; if the first surface is the back side of the electrode substrate, the second surface is the front side of the electrode substrate.

[0052] The edge of the coating area may refer to the edge of the coating area along the length direction. It should be understood that the length direction may also be referred to as the longitudinal direction (machine direction, MD) of the pole piece.

[0053] The slurry can also be called an 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.

[0054] The reference edge may be an edge of the electrode substrate along the length direction, and the edge may be any one of the two edges or both edges. Alternatively, the reference edge may also be an edge manually set by the user.

[0055] Optionally, the first distance and the second distance may be measured manually, such as by using a tape measure to obtain the first distance and the second distance.

[0056] Alternatively, the first distance and the second distance may be acquired through an imaging device, such as a charge coupled device (CCD) visual system, so that the efficiency of acquiring the first distance and the second distance can be greatly improved and the accuracy is high.

[0057] Optionally, the first distance and the second distance may be acquired in real time. Alternatively, the first distance and the second distance may be acquired periodically. For example, the first distance and the second distance may be acquired once every 5 mm. Alternatively, the first distance and the second distance may be acquired randomly.

[0058] Optionally, the pole piece substrate may be skew-corrected, that is, the target skew-correction amount is the skew-correction amount of the pole piece substrate.

[0059] Optionally, the coating die head may be corrected, that is, the target correction amount is the correction amount of the coating die head.

[0060] In some embodiments, S120 may specifically include: determining a first misalignment value set according to the first distance and the second distance, and determining a target correction amount according to the first misalignment value and at least one preset correction amount. The first misalignment value set includes a first misalignment value between an edge of a coating area on at least one first surface and an edge of a coating area on a corresponding second surface in a width direction of the electrode substrate.

[0061] This technical solution determines the misalignment value between two corresponding surfaces based on the first distance and the second distance, which is simple to implement and effectively reduces the complexity of implementation. Furthermore, the target correction amount is determined based on the misalignment value between the two corresponding surfaces and the preset correction amount, so that the target correction amount can be determined with high efficiency and accuracy. Correction is performed based on the target correction amount, so that the coating misalignment size between the two corresponding surfaces can be within the specification range, thereby effectively improving the performance of the battery.

[0062] The width direction of the pole piece substrate may also be referred to as a transverse direction (TD).

[0063] There may be multiple first distances, and accordingly, there may be multiple second distances. Then, there may be multiple first misalignment values, and the number of first misalignment values ​​is the same as the number of first distances and second distances.

[0064] 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 misalignment of the electrode AB surface coating allowed in the production and manufacturing of batteries, empirical values, and on-site production and manufacturing requirements.

[0065] Normally, in the normal production process, the range of the first misalignment value can be between -1mm and 1mm. And if the deviation is corrected too much, the pole piece substrate may be broken. Furthermore, usually in the deviation correction process, the deviation correction accuracy is 0.1mm. Therefore, in an embodiment of the present application, at least one preset deviation correction amount may include at least one of the following deviation correction amounts: -0.1mm, 0.1mm, -0.2mm, 0.2mm, -0.3mm, 0.3mm, -0.4mm, 0.4mm, -0.5mm and 0.5mm.

[0066] It should be noted that the embodiments of the present application do not specifically limit the "+" and "-" in the preset deviation correction amount. If "+" indicates deviation correction along the TD direction toward the first direction, such as deviation correction to the left, then "-" indicates deviation correction along the TD direction in the direction opposite to the first direction, such as deviation correction to the right. If "+" indicates deviation correction along the TD direction in the direction opposite to the first direction, such as deviation correction to the right, then "-" indicates deviation correction along the TD direction toward the first direction, such as deviation correction to the left.

[0067] 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. While correcting the misalignment of the coated AB surface within the specification range, it also meets the correction accuracy of the correction mechanism and reduces the probability of tape breakage of the electrode substrate.

[0068] Figure 2 A schematic diagram of AB surface coating is shown. Figure 2 The example shown is one out of four materials, and the first offset value includes 4 offset values. In addition to one out of four materials, in general, the coating production line can also include one out of two materials, one out of six materials, one out of eight materials, one out of ten materials, and one out of twelve materials.

[0069] from Figure 2 It can be seen that the first distances on the A surface are AL1, AL2, AL3 and AL4, and the corresponding second distances on the B surface are BL1, BL2, BL3 and BL4, then the first misalignment value set includes 4 first misalignment values, namely a=AL1-BL1, b=AL2-BL2, c=AL3-BL3, c=AL4-BL4.

[0070] Further, in an embodiment of the present application, determining a target correction amount according to a first misalignment value and at least one preset correction amount may include: using at least one preset correction amount to sequentially perform initial correction on the first misalignment value to obtain at least one second misalignment value set, wherein each second misalignment value set in the at least one second misalignment value set is a misalignment value set after initial correction on the first misalignment value using the same preset correction amount, and the number of at least one second misalignment value set is the same as the number of at least one preset correction amount. Then, based on at least one second misalignment value set, at least one preset correction amount, and the first misalignment value, the target correction amount is determined.

[0071] This technical solution first uses a preset correction amount to perform initial correction on the misalignment value between two corresponding surfaces, and then determines the final target correction amount based on the result of the initial correction. This helps to eliminate inappropriate correction amounts from the preset correction amounts, thereby reducing the amount of calculation for determining the target correction amount, and thereby improving the efficiency of determining the target correction amount and performing correction.

[0072] Each second misalignment value set in the at least one second misalignment value set may include at least one second misalignment value, and the number of the at least one second misalignment value included in each second misalignment value set is the same as the number of the first misalignment values.

[0073] For example, assume that at least one preset correction amount includes x1, x2, x3, x4, x5, x6, x7, x8, x9 and x10. First, use x1 to perform initial correction on a, b, c and d to obtain the first second misalignment value set, which includes four second misalignment values, namely (a+x1), (b+x1), (c+x1) and (d+x1). Then, use x2 to perform initial correction on a, b, c and d to obtain the second second misalignment value set, which includes four second misalignment values, namely (a+x2), (b+x2), (c+x2) and (d+x2)...Finally, use x10 to perform initial correction on a, b, c and d to obtain the tenth second misalignment value set, which includes four second misalignment values, namely (a+x10), (b+x10), (c+x10) and (d+x10).

[0074] Further, determining the target deviation correction amount based on at least one second misalignment value set, at least one preset deviation correction amount, and the first misalignment value may include: selecting the second misalignment value with the largest absolute value in each second misalignment value set in at least one second misalignment value set, and then determining the second target misalignment value, the second target misalignment value being a misalignment value smaller than the first target misalignment value in at least one second misalignment value with the largest absolute value, the first target misalignment value being a misalignment value with the largest absolute value in the first misalignment value set. Then, determining the target deviation correction amount based on the first preset deviation correction amount in at least one preset deviation correction amount, the first preset deviation correction amount including the preset deviation correction amount corresponding to the second target misalignment value.

[0075] During the correction process, if the absolute value of the misalignment value after correction by a certain correction amount is larger than that before correction, that is, the more correction, the more deviation, then the correction amount is inappropriate. Therefore, the above technical solution selects the misalignment value after the initial correction whose absolute value is smaller than the misalignment value before correction, and determines the target correction amount based on the correction amount corresponding to the selected misalignment value, that is, abandons the inappropriate correction amount. In this way, not only the probability of more deviation after correction is reduced, but also the number of appropriate correction amounts selected may be less than the number of correction amounts preset at the beginning, which effectively reduces the time spent on determining the target correction amount and improves efficiency.

[0076] Continuing with the example, in the first second misalignment value set, select the second misalignment value with the largest absolute value, that is, h1=max(|a+x1|, |b+x1|, |c+x1|, |d+x1|), in the second second misalignment value set, select the second misalignment value with the largest absolute value, that is, h2=max(|a+x2|, |b+x2|, |c+x2|, |d+x2|)… and in the tenth second misalignment value set, select the second misalignment value with the largest absolute value, that is, h10=max(|a+x10|, |b+x10|, |c+x10|, |d+x10|).

[0077] And select the misalignment value with the largest absolute value in the first misalignment value set, and define it as the first target misalignment value, that is, the first target misalignment value f=max(|a|, |b|, |c|, |d|).

[0078] Then, a misalignment value less than f is selected from h1, h2, h3, ..., h10. Assuming that h1, h3, h6, and h8 are less than f, the preset correction amounts corresponding to h1, h3, h6, and h8 are x1, x3, x6, and x8, respectively, and x1, x3, x6, and x8 are collectively referred to as the first preset correction amount.

[0079] The first preset deviation correction amount may be multiple or one.

[0080] When the number of the first preset deviation correction amount is one, the first preset deviation correction amount may be determined as the target deviation correction amount.

[0081] In the above technical solution, when the number of the first preset correction amount is one, the first preset correction amount is determined as the target correction amount, which not only greatly reduces the calculation complexity but also has a higher accuracy rate in determining the target correction amount.

[0082] In the case where there are multiple first preset correction amounts, a set of misalignment values ​​that is obtained by initially correcting the first misalignment value using the first preset correction amount can be selected from the second misalignment value set to obtain at least one second target misalignment value set, and then the target correction amount can be determined based on the second misalignment value included in each second target misalignment value set in the at least one second target misalignment value set.

[0083] This technical solution determines the target correction amount based on the misalignment value after initial correction of the misalignment value between two surfaces using a suitable correction amount, which can greatly improve the accuracy of the determined target correction amount.

[0084] To illustrate again, the first second target misalignment value set includes the misalignment values ​​obtained after initial correction of a, b, c and d using x1, that is, the first second target misalignment value set includes misalignment values ​​a1, b1, c1 and d1, where a1=a+x1, b1=b+x1, c1=c+x1, d1=d+x1. The second second target misalignment value set includes the misalignment values ​​obtained after initial correction of a, b, c and d using x3, that is, the second second target misalignment value set includes misalignment values ​​a2, b2, c2 and d2, where a2=a+x3, b2=b+x3, c2=c+x3, d1=d+x3. The third second target misalignment value set includes the misalignment values ​​obtained after initial correction of a, b, c and d using x6, that is, the third second target misalignment value set includes misalignment values ​​a3, b3, c3 and d3, where a3=a+x6, b3=b+x6, c3=c+x6, d3=d+x6. The fourth second target misalignment value set includes the misalignment values ​​obtained after initial correction of a, b, c and d using x8, that is, the fourth second target misalignment value set includes four misalignment values ​​a4, b4, c4 and d4, where a4=a+x8, b4=b+x8, c4=c+x8, d4=d+x8.

[0085] Afterwards, the second misalignment values ​​included in each second target misalignment value set can be added to obtain at least one misalignment value sum, and then the first preset correction amount corresponding to the sum of the misalignment values ​​with the smallest absolute value in the at least one misalignment value sum can be determined as the target correction amount.

[0086] The above technical scheme, according to the rule that the sum approaches 0 after correction, that is, the smaller the better, determines the preset correction amount corresponding to the sum of the misalignment values ​​with the smallest absolute value in the sum of the misalignment values ​​as the target correction amount. The accuracy of the target correction amount determined in this way is higher, and the effect of correction based on the target correction amount is higher, thereby further improving the performance of the battery.

[0087] Specifically, after adding the second misalignment values ​​in each second target misalignment value set, the sum of the four misalignment values ​​is obtained, which are y1=a1+b1+c1+d1, y2=a2+b2+c2+d2, y3=a3+b3+c3+d3, and y4=a4+b4+c4+d4.

[0088] Afterwards, the target offset can be determined based on the sum of the four misalignment values.

[0089] As an example, the first preset correction amount corresponding to the sum of the misalignment values ​​with the smallest absolute value among the sum of the four misalignment values ​​can be determined as the target correction amount. For example, if min(|y1|, |y2|, |y3|, |y4|)=y2, the target offset is x3.

[0090] As another example, the sum of each misalignment value in the sum of the four misalignment values ​​may be averaged, and the first preset correction amount corresponding to the average with the smallest absolute value among the averages is the target correction amount.

[0091] After the target deviation correction amount is determined, the electrode substrate or coating die head can be adjusted based on the target deviation correction amount so that the AB surface coating misalignment is within the specification range.

[0092] The solutions of the embodiments of the present application are described below with reference to specific examples.

[0093] Assume that the first misalignment value set includes 4 first misalignment values, and the 4 first misalignment values ​​are 0.05mm, 0.2mm, 0.15mm and -0.5mm respectively, and the preset correction amounts include -0.1mm, 0.1mm, -0.2mm, 0.2mm, -0.3mm, 0.3mm, -0.4mm, 0.4mm, -0.5mm and 0.5mm.

[0094] First, 10 preset correction amounts are used to correct the four first misalignment values ​​in turn, and the second misalignment value with the largest absolute value is selected from each obtained set of second misalignment values.

[0095] Specifically, after using -0.1mm to correct the four first misalignment values, the first second misalignment value set k1 = (-0.05mm, 0.1mm, 0.05mm, -0.6mm) is obtained, and h1 = max(|-0.05mm|, |0.1mm|, |0.05mm|, |-0.6mm|) = 0.6mm.

[0096] After using 0.1mm to correct the 4 first misalignment values, the second misalignment value set k2 = (0.15mm, 0.3mm, 0.25mm, -0.4mm) is obtained, and h2 = max(|0.15mm|, |0.3mm|, |0.25mm|, |-0.4mm|) = 0.4mm.

[0097] After using -0.2mm to correct the four first misalignment values, we get the third second misalignment value set k3 = (-0.15mm, 0mm, -0.05mm, -0.7mm), and h3 = max(|-0.15mm|, |0mm|, |-0.05mm|, |-0.7mm|) = 0.7mm.

[0098] After using 0.2mm to correct the four first misalignment values, the fourth second misalignment value set k4 = (0.25mm, 0.4mm, 0.35mm, -0.3mm) is obtained, and h4 = max(|0.25mm|, |0.4mm|, |0.35mm|, |-0.3mm|) = 0.4mm.

[0099] After using -0.3mm to correct the four first misalignment values, the fifth second misalignment value set k5 = (-0.25mm, -0.1mm, -0.15mm, -0.8mm) is obtained, and h5 = max(|-0.25mm|, |-0.1mm|, |-0.15mm|, |-0.8mm|) = 0.8mm.

[0100] After using 0.3mm to correct the four first misalignment values, the sixth second misalignment value set k6 = (0.35mm, 0.5mm, 0.45mm, -0.2mm) is obtained, and h6 = max(|0.35mm|, |0.5mm|, |-0.45mm|, |-0.2mm|) = 0.5mm.

[0101] After using -0.4mm to correct the four first misalignment values, the seventh second misalignment value set k7 = (-0.35mm, -0.2mm, -0.25mm, -0.9mm) is obtained, and h7 = max(|-0.35mm|, |-0.2mm|, |-0.25mm|, |-0.9mm|) = 0.9mm.

[0102] After using 0.4mm to correct the four first misalignment values, 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.

[0103] After using -0.5mm to correct the four first misalignment values, 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.

[0104] After using 0.5mm to correct the four first misalignment values, 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.

[0105] 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.

[0106] It can be seen that h1, h3, h5, h7, h8, h9 and h10 are all greater than f, indicating that 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 result in more deviations, and the misalignment size of the AB surface 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, and the preset correction amounts of 0.1mm, 0.2mm and 0.3mm corresponding to h2, h4 and h6 meet the requirements.

[0107] The second misalignment values ​​obtained after correcting the 4 first misalignment values ​​by 0.1mm are 0.15mm, 0.3mm, 0.25mm, and -0.4mm, and the sum y1 = 0.3mm is obtained by adding them together. The second misalignment values ​​obtained after correcting the 4 first misalignment values ​​by 0.2mm are 0.25mm, 0.4mm, 0.35mm, and -0.3mm, and the sum y2 = 0.7mm is obtained by adding them together. The second misalignment values ​​obtained after correcting the 4 first misalignment values ​​by 0.3mm are 0.35mm, 0.5mm, 0.45mm, and -0.2mm, and the sum y3 = 1.1mm is obtained by adding them together.

[0108] According to the rule that the sum approaches 0 after correction, the smaller the sum, the better, and finally the target correction amount is determined to be 0.1mm.

[0109] In the embodiments of the present application, the sequence numbers of the above processes do not mean the order of execution. The order of execution 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 the present application.

[0110] Furthermore, under the premise of no conflict, the various embodiments and / or the technical features in the various embodiments described in the present application may be arbitrarily combined with each other, and the technical solutions obtained after the combination shall also fall within the protection scope of the present application.

[0111] The coating correction method of the embodiment of the present application is described in detail above, and the coating correction device of the embodiment of the present application will be described below. It should be understood that the coating correction device in the embodiment of the present application can execute the coating correction method in the embodiment of the present application.

[0112] Figure 3 FIG. 3 is a schematic block diagram of a coating correction device 300 according to an embodiment of the present application. Figure 3 As shown, the coating correction device 300 may include:

[0113] The acquisition unit 310 is used to acquire a first distance and a second distance, wherein the first distance is the distance from the edge of the coating area on the first surface of the electrode substrate to the 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.

[0114] The determination unit 320 is used to determine a target deviation correction amount in the coating process according to the first distance, the second distance and at least one preset deviation correction amount.

[0115] Optionally, in an embodiment of the present application, the determination unit 320 is specifically used to: determine a first misalignment value set based on the first distance and the second distance, the first misalignment value set including a first misalignment value between an edge of a coating area on at least one first surface and an edge of a coating area on a corresponding second surface in the width direction of the electrode substrate; determine a target correction amount based on the first misalignment value and at least one preset correction amount.

[0116] Optionally, in an embodiment of the present application, the coating correction device 300 may further include: a correction unit, used to use at least one preset correction amount to perform initial correction on the first misalignment values ​​in sequence to obtain at least one second misalignment value set, each second misalignment value set in the at least one second misalignment value set is a misalignment value set after the first misalignment value is initially corrected using the same preset correction amount, and the number of at least one second misalignment value set is the same as the number of at least one preset correction amount; the determination unit 320 is specifically used to: determine the target correction amount based on at least one second misalignment value set, at least one preset correction amount and the first misalignment value.

[0117] Optionally, in an embodiment of the present application, each second misalignment value set in at least one second misalignment value set includes at least one second misalignment value, and the coating correction device 300 may also include: a selection unit, used to select the second misalignment value with the largest absolute value in each second misalignment value set in at least one second misalignment value set, and the determination unit 320 is specifically used to: determine a second target misalignment value, the second target misalignment value is a misalignment value that is smaller than the first target misalignment value in at least one second misalignment value 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; determine the target correction amount based on a first preset correction amount in at least one preset correction amount, and the first preset correction amount includes a preset correction amount corresponding to the second target misalignment value.

[0118] Optionally, in an embodiment of the present application, when the number of first preset correction amounts is multiple, 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, to obtain at least one second target misalignment value set; the determination unit 320 is specifically used to: determine the target correction amount based on the second misalignment value included in each second target misalignment value set in at least one second target misalignment value set.

[0119] Optionally, in an embodiment of the present application, the determination unit 320 is specifically used to: add the second misalignment values ​​included in each second target misalignment value set to obtain the sum of at least one misalignment value; and determine the first preset correction amount corresponding to the sum of the misalignment values ​​with the smallest absolute value in the sum of at least one misalignment value as the target correction amount.

[0120] Optionally, in the embodiment of the present application, when the number of the first preset deviation correction amount is one, the determination unit 320 is specifically configured to: determine the first preset deviation correction amount as the target deviation correction amount.

[0121] Optionally, in an embodiment of the present 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.

[0122] It should be understood that the coating deviation correction device 300 can implement the corresponding operations in the method 100, and for the sake of brevity, it will not be described in detail here.

[0123] Figure 4 4 is a schematic diagram of the hardware structure of the coating correction device 400 of the embodiment of the present application. The coating correction device 400 includes a memory 401, a processor 402, a communication interface 403 and a bus 404. The memory 401, the processor 402, and the communication interface 403 are connected to each other through the bus 404.

[0124] The memory 401 may be a read-only memory (ROM), a static storage device, and a random access memory (RAM). The memory 401 may store a program. When the program stored in the memory 401 is executed by the processor 402, the processor 402 and the communication interface 403 are used to execute each step of the coating correction method of the embodiment of the present application.

[0125] The processor 402 can adopt a general central processing unit (CPU), a microprocessor, an application specific integrated circuit (ASIC), a graphics processing unit (GPU) or one or more integrated circuits to execute relevant programs to implement the functions required to be performed by the units in the device of the embodiment of the present application, or to execute the coating correction method of the embodiment of the present application.

[0126] The processor 402 may also be an integrated circuit chip with signal processing capability. In the implementation process, each step of the coating correction method of the embodiment of the present application may be completed by an integrated logic circuit of hardware in the processor 402 or by instructions in the form of software.

[0127] The processor 402 may also be a general-purpose processor, a digital signal processor (DSP), an ASIC, a field programmable gate array (FPGA) or other programmable logic device, a discrete gate or transistor logic device, or a discrete hardware component. The methods, steps and logic block diagrams disclosed in the embodiments of the present application may be implemented or executed. The general-purpose processor may be a microprocessor or the processor may be any conventional processor, etc. The steps of the method disclosed in the embodiments of the present application may be directly embodied as being executed by a hardware processor, or may be executed by a combination of hardware and software modules in the processor. The software module may be located in a mature storage medium in the art such as a random access memory, a flash memory, a read-only memory, a programmable read-only memory or an electrically erasable programmable memory, a register, etc. The storage medium is located in the memory 401, and the processor 402 reads the information in the memory 401, and completes the functions required to be performed by the units included in the coating correction device 400 of the embodiment of the present application in combination with its hardware, or performs the coating correction method of the embodiment of the present application.

[0128] The communication interface 403 uses a transceiver device such as but not limited to a transceiver to achieve communication between the coating correction device 400 and other equipment or a communication network.

[0129] The bus 404 may include a path for transmitting information between various components of the coating and deflection correction device 400 (eg, the memory 401 , the processor 402 , and the communication interface 403 ).

[0130] It should be noted that although the above-mentioned coating correction device 400 only shows a memory, a processor, and a communication interface, in the specific implementation process, those skilled in the art should understand that the coating correction device 400 may also include other devices necessary for normal operation. At the same time, according to specific needs, those skilled in the art should understand that the coating correction device 400 may also include hardware devices for realizing other additional functions. In addition, those skilled in the art should understand that the coating correction device 400 may also only include the devices necessary to realize the embodiments of the present application, and does not necessarily include Figure 4 All devices shown in .

[0131] The embodiments of the present application also provide a computer-readable storage medium for storing a computer program, which is used to execute the methods of the various embodiments of the present application described above.

[0132] The computer-readable storage medium mentioned above may be a transient computer-readable storage medium or a non-transitory computer-readable storage medium.

[0133] An embodiment of the present application also provides a computer program product, which includes a computer program stored on a computer-readable storage medium, and the computer program includes program instructions. When the program instructions are executed by a computer, the computer executes the above-mentioned coating correction method.

[0134] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein, but these modifications or replacements 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 the present application.

Claims

1. A coating correction method, characterized in that: The method comprises: Acquire a first distance and a second distance, wherein the first distance is the distance from the edge of the coating area on the first surface of the pole piece substrate to the reference edge, and the second distance is the distance from the edge of the coating area on the second surface of the pole piece substrate to the reference edge; A target deviation correction amount during coating is determined according to the first distance, the second distance and at least one preset deviation correction amount.

2. The method according to claim 1, characterized in that Determining a target deviation correction amount in the coating process according to the first distance, the second distance and the at least one preset deviation correction amount includes: Determine a first misalignment value set according to the first distance and the second distance, wherein the first misalignment value set includes a first misalignment value between an edge of a coating area on at least one of the first surfaces and an edge of a corresponding coating area on the second surface in a width direction of the electrode substrate; The target correction amount is determined according to the first misalignment value and the at least one preset correction amount.

3. The method according to claim 2, characterized in that The step of determining the target correction amount according to the first misalignment value and the at least one preset correction amount includes: Using the at least one preset correction amount, initially correcting the first misalignment values ​​in sequence to obtain at least one second misalignment value set, wherein each second misalignment value set in the at least one second misalignment value set is a misalignment value set after initially correcting the first misalignment value using the same preset correction amount, and the number of the at least one second misalignment value set is the same as the number of the at least one preset correction amount; The target 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.

4. The method according to claim 3, characterized in that Each second misalignment value set in the at least one second misalignment value set includes at least one second misalignment value, and determining the target misalignment amount based on the at least one second misalignment value set, the at least one preset misalignment amount, and the first misalignment value includes: In each second misalignment value set in the at least one second misalignment value set, selecting a second misalignment value having a maximum absolute value; Determine a second target misalignment value, wherein the second target misalignment value is a misalignment value smaller than the first target misalignment value among at least one second misalignment value with the largest absolute value, and the first target misalignment value is a misalignment value with the largest absolute value among the first misalignment value set; The target correction amount is determined 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.

5. The method according to claim 4, characterized in that In the case that there are multiple first preset deviation correction amounts, determining the target deviation correction amount based on a first preset deviation correction amount among the at least one preset deviation correction amount includes: In the second misalignment value set, a misalignment value set obtained by initially correcting the first misalignment value using the first preset correction amount is selected to obtain at least one second target misalignment value set; The target deviation correction amount is determined according to the second misalignment value included in each second target misalignment value set in the at least one second target misalignment value set.

6. The method according to claim 5, characterized in that The determining the target deviation correction amount according to the second misalignment value included in each second target misalignment value set in the at least one second target misalignment value set comprises: Adding the second misalignment values ​​included in each second target misalignment value set to obtain at least one sum of misalignment values; The first preset deviation correction amount corresponding to the sum of the misalignment values ​​with the smallest absolute value in the at least one sum of the misalignment values ​​is determined as the target deviation correction amount.

7. The method according to claim 4, characterized in that In a case where the number of the first preset deviation correction amount is one, determining the target deviation correction amount based on the first preset deviation correction amount among the at least one preset deviation correction amount includes: The first preset deviation correction amount is determined as the target deviation correction amount.

8. The method according to any one of claims 1 to 7, characterized in that The at least one preset correction amount includes at least one of the following correction amounts: -0.1 mm, 0.1 mm, -0.2 mm, 0.2 mm, -0.3 mm, 0.3 mm, -0.4 mm, 0.4 mm, -0.5 mm and 0.5 mm.

9. A coating correction device, characterized in that: include: An acquisition unit, configured to acquire a first distance and a second distance, wherein the first distance is a distance from an edge of a coating area on a first surface of a pole piece substrate to a reference edge, and the second distance is a distance from an edge of a coating area on a second surface of the pole piece substrate to the reference edge; A determination unit is used to determine a target deviation correction amount in a coating process according to the first distance, the second distance and at least one preset deviation correction amount.

10. The device according to claim 9, characterized in that The determining unit is specifically used for: Determine a first misalignment value set according to the first distance and the second distance, wherein the first misalignment value set includes a first misalignment value between an edge of a coating area on at least one of the first surfaces and an edge of a corresponding coating area on the second surface in a width direction of the electrode substrate; The target correction amount is determined according to the first misalignment value and the at least one preset correction amount.

11. The device according to claim 10, characterized in that The device also includes: a correction unit, configured to perform initial correction on the first misalignment values ​​in sequence by using the at least one preset correction amount to obtain at least one second misalignment value set, wherein each second misalignment value set in the at least one second misalignment value set is a misalignment value set after the first misalignment value is initially corrected by using the same preset correction amount, and the number of the at least one second misalignment value set is the same as the number of the at least one preset correction amount; The determining unit is specifically used for: The target 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.

12. The device according to claim 11, characterized in that Each second misalignment value set in the at least one second misalignment value set includes at least one second misalignment value, and the apparatus further includes: A selection unit, configured to select a second misalignment value with the largest absolute value in each second misalignment value set in the at least one second misalignment value set; The determining unit is specifically used for: Determine a second target misalignment value, wherein the second target misalignment value is a misalignment value smaller than the first target misalignment value among at least one second misalignment value with the largest absolute value, and the first target misalignment value is a misalignment value with the largest absolute value among the first misalignment value set; The target correction amount is determined 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.

13. The device according to claim 12, characterized in that In the case where there are multiple first preset deviation correction amounts, the selection unit is specifically configured to: In the second misalignment value set, a misalignment value set obtained by initially correcting the first misalignment value using the first preset correction amount is selected to obtain at least one second target misalignment value set; The determining unit is specifically used for: The target deviation correction amount is determined according to the second misalignment value included in each second target misalignment value set in the at least one second target misalignment value set.

14. The device according to claim 13, characterized in that The determining unit is specifically used for: Adding the second misalignment values ​​included in each second target misalignment value set to obtain at least one sum of misalignment values; The first preset deviation correction amount corresponding to the sum of the misalignment values ​​with the smallest absolute value in the at least one sum of the misalignment values ​​is determined as the target deviation correction amount.

15. The device according to claim 12, characterized in that When the number of the first preset deviation correction amount is one, the determining unit is specifically configured to: The first preset deviation correction amount is determined as the target deviation correction amount.

16. The device according to any one of claims 9 to 15, characterized in that The at least one preset correction amount includes at least one of the following correction amounts: -0.1 mm, 0.1 mm, -0.2 mm, 0.2 mm, -0.3 mm, 0.3 mm, -0.4 mm, 0.4 mm, -0.5 mm and 0.5 mm.

17. A coating correction device, characterized in that: include: Memory, used to store programs; A processor is used to execute the program stored in the memory. When the program stored in the memory is executed, the processor is used to execute the coating correction method according to any one of claims 1 to 8.

18. A computer-readable storage medium, characterized in that: Used to store a computer program, wherein the computer program enables a computer to execute the coating correction method according to any one of claims 1 to 8.

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