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 following steps: obtaining a plurality of first distances and a plurality of second distances, each of the plurality of first distances being the distance from the edge of a coating area on a first surface of a pole piece substrate to a reference edge, each second distance in the plurality of second distances 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 the plurality of first distances and the plurality of second distances are obtained by sampling for multiple times in a sampling period; and according to the multiple first distances, the multiple second distances 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 plurality of first distances and a plurality of second distances, wherein each of the plurality of first distances is a distance from an edge of a coating area on a first surface of an electrode substrate to a reference edge, each of the plurality of second distances is a distance from an edge of a 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; determining a target correction amount in a coating process according to the plurality of first distances, the plurality of second distances 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 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. Furthermore, the multiple first distances and multiple second distances used to determine the target correction amount are obtained by sampling multiple times within a sampling period, that is, the number of parameters used to determine the target correction amount is large, so that the accuracy of the determined target correction amount can be effectively improved.

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

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

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

[0010] The above technical solution determines the target deviation correction amount according to the average value of multiple initial deviation correction amounts. It has less computational complexity, is simple to implement, and greatly improves the computational speed.

[0011] In some possible implementations, the multiple first distances include a first target distance, the multiple second distances include a second target distance, and the first target distance and the second target distance are distances acquired in the same sampling; the multiple initial correction amounts are determined according to each first distance, the second distance corresponding to each first distance, and the at least one preset correction amount, including: determining a first misalignment value set according to the first target distance and the second target 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 corresponding coating area on the second surface in the width direction of the pole piece substrate; determining a first initial correction amount among the multiple initial correction amounts according to 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 according to a first distance among a plurality of first distances and a second distance corresponding thereto, which is simple to implement and effectively reduces the complexity of implementation. Furthermore, an initial correction amount among the initial correction amounts is determined according to the misalignment value between the two corresponding surfaces and a preset correction amount, so that the initial correction amount can be determined with high efficiency and accuracy.

[0013] In some possible implementations, determining the first initial correction amount among the multiple initial correction amounts 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 first initial correction amount based on the at least one second misalignment value set, 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, and then determines the initial correction amount based on the result of the initial correction, which helps to eliminate inappropriate correction amounts in the preset correction amount, so that the amount of calculation for determining the initial correction amount can be reduced, thereby improving the efficiency of determining the initial correction amount and performing correction. In addition, the technical solution adopts closed-loop logic, so as to further improve the accuracy of the initial correction amount.

[0015] 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 first initial 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 first initial 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.

[0016] 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 initial 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 initial correction amount and improves efficiency.

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

[0018] The above technical solution determines the initial correction amount based on the misalignment value after initial correction of the misalignment value between the two surfaces using a suitable 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 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 first initial correction amount.

[0020] 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 initial correction amount. The accuracy of the initial correction amount determined in this way is high, and the accuracy of the target correction amount determined based on the initial correction amount is also high, so that the effect after correction based on the target correction amount is better, further improving the performance of the battery.

[0021] In some possible implementations, when the number of the first preset correction amounts 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] 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 initial correction amount, which not only greatly reduces the computational complexity but also increases the accuracy of the determined initial correction amount.

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

[0024] The above technical solution, after the correction is completed, determines the correction effect after correction through information interaction with the correction mechanism, which is not only easy to implement, but also can reduce 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, thereby leading 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: -0.1 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.

[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. 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.

[0027] In a second aspect, a coating correction device is provided, comprising: an acquisition unit, used to acquire a plurality of first distances and a plurality of second distances, wherein each of the plurality of first distances is a distance from an edge of a coating area on a first surface of an electrode substrate to a reference edge, each of the plurality of second distances is a distance from an edge of a 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; a determination unit, used to determine a target correction amount in a coating process according to the plurality of first distances, the plurality of second distances and at least one preset correction amount.

[0028] In some possible implementations, the determination unit is specifically used to: determine multiple initial correction amounts based on each first distance, the second distance corresponding to each first distance, and the at least one preset correction amount; determine the target correction amount based on the multiple initial correction amounts.

[0029] In some possible implementations, the determining unit is specifically configured to determine the target correction amount according to an average value of the multiple initial correction amounts.

[0030] In some possible implementations, the multiple first distances include a first target distance, the multiple second distances include a second target distance, and the first target distance and the second target distance are distances acquired in the same sampling; the determination 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 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 the width direction of the pole piece substrate; determine a first initial correction amount among the multiple initial correction amounts based on the first misalignment value and the at least one preset correction amount.

[0031] 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 first initial correction amount based on the at least one second misalignment value set, the at least one preset correction amount and the first misalignment value.

[0032] In some possible implementations, the device also includes: a selection unit, used 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 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, the first target misalignment value is the misalignment value with the largest absolute value in the first misalignment value set; determine the first initial correction amount based on a first preset correction amount in the at least one preset correction amount, the first preset correction amount including 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 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 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 determination 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 misalignment values ​​with the smallest absolute value in 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 deviation correction amount is one, the determining unit is specifically configured to: determine the first preset deviation correction amount as the first initial deviation correction amount.

[0036] In some possible implementations, the device also includes: a communication unit, used to send correction information to the correction mechanism, 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 is used to indicate that the correction of the electrode substrate or the coating die head has been completed; a judgment unit, used to judge whether the misalignment value between each first distance after correction and the corresponding second distance is within a preset range in response to the response information.

[0037] 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.

[0038] 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.

[0039] 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

[0040] 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.

[0041] In the drawings, the drawings are not drawn to scale.

[0042] Figure 1It is a schematic flow chart of a coating correction method according to an embodiment of the present application.

[0043] Figure 2 It is a schematic diagram of AB surface coating in an embodiment of the present application.

[0044] Figure 3 It is a schematic flow chart of a specific coating correction method of an embodiment of the present application.

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

[0046] Figure 5 It is a schematic block diagram of a coating correction device according to an embodiment of the present application. DETAILED DESCRIPTION

[0047] 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.

[0048] In the description of the present application, it should be noted that, unless otherwise specified, "multiple" means more than two; the directions or positional relationships indicated by the terms "upper", "lower", "left", "right", "inner", "outer", etc. are only for the convenience of describing the present 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 the present 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.

[0049] 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.

[0050] 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.

[0051] 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.

[0052] 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.

[0053] 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.

[0054] During the coating process, the coating result of the electrode may deviate due to the pressure of the coating die nozzle and other reasons. 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.

[0055] 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.

[0056] 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.

[0057] S110: Acquire 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 pole piece substrate to the 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 pole piece substrate to the reference edge, and each first distance and the corresponding second distance are obtained by sampling once within a sampling period.

[0058] S120: Determine a target deviation correction amount in the coating process according to a plurality of first distances, a plurality of second distances and at least one preset deviation correction amount.

[0059] 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 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. Furthermore, the multiple first distances and multiple second distances used to determine the target correction amount are obtained by sampling multiple times within a sampling period, that is, the number of parameters used to determine the target correction amount is large, so that the accuracy of the determined target correction amount can be effectively improved.

[0060] 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.

[0061] 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.

[0062] 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.

[0063] 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.

[0064] 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.

[0065] Optionally, manual measurement may be performed, such as obtaining a plurality of first distances and a plurality of second distances by using a tape measure.

[0066] Alternatively, multiple first distances and multiple second distances may be acquired through an imaging device, such as a charge coupled device (CCD) camera, so that the efficiency of acquiring the first distance and the second distance can be greatly improved and the accuracy is high.

[0067] In one sampling period, a first distance and a second distance may 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 AB surface coating is shown. Figure 2 The one shown is one with four materials. It should be understood that in addition to one with four materials, in general, the coating production line can also include one with two materials, one with six materials, one with eight materials, one with ten materials, and one with twelve materials.

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

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

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

[0072] This technical solution first determines multiple initial correction amounts based on each first distance, each second distance and at least one preset correction amount, and then determines the target correction amount based on the multiple initial correction amounts. That is, an intermediate parameter is determined in the correction process, and the final target correction amount is determined based on the intermediate parameter, thereby effectively reducing the complexity of the entire process and effectively improving the correction efficiency.

[0073] As an example, the target deviation correction amount can be determined based on the average value of multiple initial deviation correction amounts. As an example, considering that the deviation correction amount is usually a multiple of 0.1, the average value can be rounded off and only the data after the decimal point can be calculated. This technical solution determines the target deviation correction amount based on the average value of multiple initial deviation correction amounts, has a small amount of calculation, is simple to implement, and greatly improves the calculation rate.

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

[0075] The implementation method of determining the initial deviation correction amount will be described in detail below. For ease of description, the following description will be made by taking one of the multiple first distances and one of the multiple second distances as an example.

[0076] The multiple first distances may include a first target distance, the multiple second distances may include a second target distance, and the first target distance and the second target distance are distances obtained in the same sampling. At this time, according to each first distance, the second distance corresponding to each first distance, and at least one preset correction amount, multiple initial correction amounts are determined, which may include: determining a first misalignment value set according to the first target distance and the second target distance, and determining a first initial correction amount among the multiple initial correction amounts 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 the width direction of the pole piece substrate.

[0077] The technical solution determines the misalignment value between two corresponding surfaces according to a first distance among a plurality of first distances and a second distance corresponding thereto, which is simple to implement and effectively reduces the complexity of implementation. Furthermore, an initial correction amount among the initial correction amounts is determined according to the misalignment value between the two corresponding surfaces and a preset correction amount, so that the initial correction amount can be determined with high efficiency and accuracy.

[0078] The width direction of the pole piece substrate may also be referred to as a transverse direction (TD).

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

[0080] Continue to refer Figure 2 .from Figure 2 It can be seen that 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, respectively. The first misalignment value set includes 4 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 misalignment of the electrode AB surface coating allowed in the production and manufacturing of batteries, empirical values, and on-site production and manufacturing requirements.

[0082] 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.

[0083] 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.

[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. 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.

[0085] Further, in an embodiment of the present application, determining a first initial deviation correction amount among multiple initial deviation correction amounts according to a first deviation value and at least one preset deviation correction amount may include: using at least one preset deviation correction amount to perform initial deviation correction on the first deviation value in sequence to obtain at least one second deviation value set, wherein each second deviation value set in the at least one second deviation value set is a deviation value set after the first deviation value is initially corrected using the same preset deviation correction amount, and the number of at least one second deviation value set is the same as the number of at least one preset deviation correction amount. Then, based on at least one second deviation value set, at least one preset deviation correction amount, and the first deviation value, the first initial deviation correction amount is determined.

[0086] The technical solution first uses a preset correction amount to perform initial correction on the misalignment value between two corresponding surfaces, and then determines the initial correction amount based on the result of the initial correction, which helps to eliminate inappropriate correction amounts in the preset correction amounts, so that the amount of calculation for determining the initial correction amount can be reduced, thereby improving the efficiency of determining the initial correction amount and performing correction. In addition, the technical solution adopts closed-loop logic, so as to further improve the accuracy of the initial correction amount.

[0087] 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.

[0088] 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).

[0089] Further, determining the first initial correction amount based on at least one second misalignment value set, at least one preset 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 first initial correction amount based on the first preset correction amount in at least one preset correction amount, the first preset correction amount including the preset correction amount corresponding to the second target misalignment value.

[0090] 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 initial 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 initial correction amount and improves efficiency.

[0091] 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|).

[0092] 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|).

[0093] 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.

[0094] The first preset deviation correction amount may be multiple or one.

[0095] In a case where the number of the first preset deviation correction amount is one, the first preset deviation correction amount may be determined as the first preset deviation correction amount.

[0096] 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 initial correction amount, which not only greatly reduces the computational complexity but also increases the accuracy of the determined initial correction amount.

[0097] In the case where there are multiple first preset correction amounts, a set of misalignment values ​​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 first initial 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.

[0098] This technical solution determines the initial 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 initial correction amount.

[0099] 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.

[0100] 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 first initial correction amount.

[0101] 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 initial correction amount. The accuracy of the initial correction amount determined in this way is high, and the accuracy of the target correction amount determined based on the initial correction amount is also high, so that the effect after correction based on the target correction amount is better, further improving the performance of the battery.

[0102] 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.

[0103] Afterwards, the first initial offset may be determined according to the sum of the four misalignment values.

[0104] 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 first initial correction amount. For example, if min(|y1|, |y2|, |y3|, |y4|)=y2, the first initial offset is x3.

[0105] 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 in the averages is the first initial correction amount.

[0106] A specific implementation method for determining the first initial deviation correction amount is described below with reference to a specific example.

[0107] 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.

[0108] 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.

[0109] 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.

[0110] 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.

[0111] 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.

[0112] 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.

[0113] 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.

[0114] 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.

[0115] 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.

[0116] 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.

[0117] 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.

[0118] 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.

[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 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.

[0121] 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.

[0122] According to the rule that the sum approaches 0 after correction, that is, the smaller the sum, the better, the first initial correction amount is finally determined to be 0.1 mm.

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

[0124] After a plurality of initial deviation correction amounts are determined, a target deviation correction amount may be determined based on the plurality of initial deviation correction amounts.

[0125] As mentioned above, the average value of multiple initial deviation correction amounts can be determined as the target deviation correction amount.

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

[0127] Furthermore, correction information may be sent to the correction mechanism, where the correction information is used to indicate a target correction amount.

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

[0129] If the correction mechanism is provided with the correction coefficient, the correction information may include the target correction amount. In this way, after the correction mechanism receives the target correction amount, the target correction amount and the correction coefficient may be multiplied, and the obtained product may be used to adjust the electrode substrate or the coating die head so that the coating misalignment of the AB surface is within the specification range.

[0130] Alternatively, the correction information may 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 the coating die.

[0131] After the correction mechanism has completed the adjustment of the electrode substrate or the coating die, a response message may be sent, where the response message is used to indicate that the correction of the electrode substrate or the coating die has been completed.

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

[0133] Specifically, a plurality of first distances after deflection correction and a plurality of second distances after deflection correction may be obtained within one sampling period, and then it may be determined whether the misalignment value is within a preset range according to the plurality of first distances after deflection correction and the plurality of second distances after deflection correction.

[0134] From receiving the response information to determining whether the misalignment value after correction is within the preset range, the transmission distance of the pole piece substrate may be L. L may be referred to as a correction period. In general, L may be, for example, a mechanical distance from the correction mechanism to the CCD camera.

[0135] Optionally, the communication and interaction with the correction mechanism can be performed by wired or wireless means. The wired communication means may include, for example, a control area network (CAN) communication means and a daisy chain communication means. The wireless communication means may include, for example, Bluetooth communication, wireless fidelity (WIFI) communication, ZigBee communication and other means, which are not limited here.

[0136] The above technical solution, after the correction is completed, determines the correction effect after correction through information interaction with the correction mechanism, which is not only easy to implement, but also can reduce 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, thereby leading to poor battery performance.

[0137] In order to more clearly describe the embodiments of the present application, Figure 3 A specific implementation process of method 100 is described in detail. Figure 3 If the material in the image is one out of four, the number of the first distance, the second distance and the first offset value are all 4. One sampling period is 20 frames of images.

[0138] In step 310, a plurality of first distances and a plurality of second distances are acquired.

[0139] The multiple first distances and the 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 of the current frame is determined.

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

[0142] In step 340, the initial correction amounts of 20 frames of images are determined continuously.

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

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

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

[0146] In step 370, a response message sent by the deviation correction mechanism is received, and the response message is used to indicate that the deviation correction of the electrode substrate or the coating die head has been completed.

[0147] In step 380, the first distance and the second distance after correction of 20 frames of images are collected.

[0148] In step 390, based on the first distances 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 it is within the preset range, it means that the correction effect is good and the correction process ends. If it is not within the preset range, step 320 is executed.

[0150] 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.

[0151] 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.

[0152] 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.

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

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

[0155] The determination unit 420 is used to determine a target deviation correction amount in the coating process according to the multiple first distances, the multiple second distances and at least one preset deviation correction amount.

[0156] Optionally, in an embodiment of the present application, the determination unit 420 is specifically used to: determine multiple initial correction amounts according to each first distance, the second distance corresponding to each first distance, and at least one preset correction amount; determine the target correction amount according to the multiple initial correction amounts.

[0157] Optionally, in the embodiment of the present application, the determination unit 420 is specifically configured to determine a target deviation correction amount according to an average value of a plurality of initial deviation correction amounts.

[0158] Optionally, in an embodiment of the present application, multiple first distances include a first target distance, and multiple second distances include a second target distance, and the first target distance and the second target distance are distances acquired in the same sampling; the determination 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 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 first initial correction amount among multiple initial correction amounts based on the first misalignment value and at least one preset correction amount.

[0159] Optionally, in the embodiment of the present application, the coating correction device 400 may further include: a correction unit, used to use at least one preset correction amount to perform initial correction on the first misalignment value 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 420 is specifically used to: determine the first initial correction amount based on at least one second misalignment value set, at least one preset correction amount and the first misalignment value.

[0160] 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 400 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 420 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 a first initial 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.

[0161] Optionally, in an embodiment of the present 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 in which the first misalignment value is initially corrected using the first preset correction amount 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 at least one second target misalignment value set.

[0162] Optionally, in an embodiment of the present application, the determination unit 420 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 first initial correction amount.

[0163] Optionally, in the embodiment of the present application, when the number of the first preset deviation correction amount is one, the determination unit 420 is specifically configured to: determine the first preset deviation correction amount as the first initial deviation correction amount.

[0164] Optionally, in an embodiment of the present application, the coating correction device 400 also includes: a communication unit, used to send correction information to the correction mechanism, 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 is used to indicate that the correction of the electrode substrate or the coating die head has been completed; a judgment unit, used to judge whether the misalignment value between each first distance after correction and the corresponding second distance is within a preset range in response to the response information.

[0165] 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.

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

[0167] Figure 5 Schematic diagram of the hardware structure of the coating correction device 500 of the embodiment of the present application. The coating correction device 500 includes a memory 501, a processor 502, a communication interface 503 and a bus 504. The memory 501, the processor 502, and the communication interface 503 are connected to each other through the bus 504.

[0168] The memory 501 may be a read-only memory (ROM), a static storage device, and a random access memory (RAM). The memory 501 may store a program. 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 embodiment of the present application.

[0169] The processor 502 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.

[0170] The processor 502 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 502 or by instructions in the form of software.

[0171] The processor 502 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 501, and the processor 502 reads the information in the memory 501, and completes the functions required to be performed by the units included in the coating correction device 500 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.

[0172] The communication interface 503 uses a transceiver device such as but not limited to a transceiver to achieve communication between the coating correction device 500 and other equipment or a communication network.

[0173] The bus 504 may include a path for transmitting information between various components of the coating and deflection correction device 500 (eg, the memory 501 , the processor 502 , and the communication interface 503 ).

[0174] It should be noted that although the above-mentioned coating correction device 500 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 500 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 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 also only include the devices necessary to implement the embodiments of the present application, and does not necessarily include Figure 5 All devices shown in .

[0175] The embodiments of the present application also provide a computer-readable storage medium for storing a computer program, wherein the computer program is used to execute the methods of the various embodiments of the present application described above.

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

[0177] 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.

[0178] 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 plurality of first distances and a plurality of second distances, wherein each of the plurality of first distances is a distance from an edge of a coating area on a first surface of a pole piece substrate to a reference edge, each of the plurality of second distances is a distance from an edge of a coating area on a second surface of the pole piece 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; A target deviation amount in the coating process is determined according to the plurality of first distances, the plurality of second distances and at least one preset deviation amount.

2. The method according to claim 1, characterized in that Determining a target deviation correction amount in the coating process according to the plurality of first distances, the plurality of second distances and at least one preset deviation correction amount includes: Determine a plurality of initial deviation correction amounts according to each of the first distances, the second distance corresponding to each of the first distances, and the at least one preset deviation correction amount; The target deviation correction amount is determined according to the multiple initial deviation correction amounts.

3. The method according to claim 2, characterized in that The step of determining the target deviation correction amount according to the multiple initial deviation correction amounts includes: The target deviation correction amount is determined according to an average value of the multiple initial deviation correction amounts.

4. The method according to claim 2 or 3, characterized in that: The multiple first distances include a first target distance, the multiple second distances include a second target distance, and the first target distance and the second target distance are distances acquired in the same sampling; The determining of a plurality of initial deviation correction amounts according to each of the first distances, the second distance corresponding to each of the first distances, and the at least one preset deviation correction amount comprises: Determine a first misalignment value set according to the first target distance and the second target 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; A first initial skew correction amount among the multiple initial skew correction amounts is determined according to the first misalignment value and the at least one preset skew correction amount.

5. The method according to claim 4, characterized in that The determining, according to the first misalignment value and the at least one preset deviation correction amount, a first initial deviation correction amount among the multiple initial deviation correction amounts comprises: 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 first initial skew correction amount is determined based on the at least one second misalignment value set, the at least one preset skew correction amount, and the first misalignment value.

6. The method according to claim 5, 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 first initial 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 first initial deviation correction amount is determined based on a first preset deviation correction amount among the at least one preset deviation correction amount, wherein the first preset deviation correction amount includes a preset deviation correction amount corresponding to the second target misalignment value.

7. The method according to claim 6, characterized in that In the case that there are multiple first preset deviation correction amounts, determining the first initial 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 first initial 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.

8. The method according to claim 7, characterized in that The determining the first initial 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 first initial deviation correction amount.

9. The method according to claim 6, characterized in that In a case where the number of the first preset deviation correction amount is one, determining the first initial deviation correction amount based on a 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 first initial deviation correction amount.

10. The method according to any one of claims 1 to 9, characterized in that The method further comprises: Sending correction information to a correction mechanism, wherein the correction information is used to indicate the target correction amount; Receiving response information sent by the correction mechanism, wherein the response information is used to indicate that the correction of the electrode substrate or the coating die head has been completed; In response to the response information, it is determined whether a misalignment value between each first distance after correction and the corresponding second distance is within a preset range.

11. The method according to any one of claims 1 to 10, 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.

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

13. The device according to claim 12, characterized in that The determining unit is specifically used for: Determine a plurality of initial deviation correction amounts according to each of the first distances, the second distance corresponding to each of the first distances, and the at least one preset deviation correction amount; The target deviation correction amount is determined according to the multiple initial deviation correction amounts.

14. The device according to claim 13, characterized in that The determining unit is specifically used for: The target deviation correction amount is determined according to an average value of the multiple initial deviation correction amounts.

15. The device according to claim 13 or 14, characterized in that The multiple first distances include a first target distance, the multiple second distances include a second target distance, and the first target distance and the second target distance are distances acquired in the same sampling; The determining unit is specifically used for: Determine a first misalignment value set according to the first target distance and the second target 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; A first initial skew correction amount among the multiple initial skew correction amounts is determined according to the first misalignment value and the at least one preset skew correction amount.

16. The device according to claim 15, 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 first initial skew correction amount is determined based on the at least one second misalignment value set, the at least one preset skew correction amount, and the first misalignment value.

17. The device according to claim 16, characterized in that The device also includes: A selection unit, configured to select a second misalignment value having a maximum absolute value from 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 first initial deviation correction amount is determined based on a first preset deviation correction amount among the at least one preset deviation correction amount, wherein the first preset deviation correction amount includes a preset deviation correction amount corresponding to the second target misalignment value.

18. The device according to claim 17, 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 first initial 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.

19. The device according to claim 18, 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 first initial deviation correction amount.

20. The device according to claim 17, 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 first initial deviation correction amount.

21. The device according to any one of claims 12 to 20, characterized in that The device also includes: A communication unit, used for sending correction information to the correction mechanism, wherein the correction information is used for indicating the target correction amount; The communication unit is also used to receive response information sent by the correction mechanism, and the response information is used to indicate that the correction of the electrode substrate or the coating die head has been completed; A judging unit is used to judge, 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.

22. The device according to any one of claims 12 to 21, 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.

23. 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 11.

24. 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 11.

Images