Current density testing method and device for electrode foil corrosion production line and computer equipment

Abstract

The invention relates to a current density testing method and device for an electrode foil corrosion production line and computer equipment. The method comprises the following steps: controlling an electrolytic bath in an electrode foil corrosion production line to carry out a corrosion power-up static test on a static light foil to obtain a static corrosion foil; controlling a sampling device in the electrode foil corrosion production line to uniformly divide and sample the static corrosion foil to obtain a plurality of corrosion foil sample wafers, and obtaining the loss weight of each corrosion foil sample wafer after the corrosion power-up static test compared with the loss weight before the corrosion power-up static test; the length of the light foil is matched with the length of the polar plate in the electrolytic bath, and all the corrosion foil sample wafers are in one-to-one correspondence with all areas of the polar plate; and for each corrosion foil sample wafer, determining the current density of the corrosion foil sample wafer according to the loss weight of the corrosion foil sample wafer and the preset current density of the production line, and obtaining the current density corresponding to different areas of the polar plate. The method is beneficial to improving the current density measurement precision.

Description

Technical Field

[0001] This application relates to the field of electrode foil processing technology, and in particular to a method, apparatus, computer equipment, computer-readable storage medium, and computer program product for testing current density in an electrode foil corrosion production line. Background Technology

[0002] In the process of etching and creating pores in electronic aluminum foil, in order to improve the capacity of the etched foil, some methods are usually adopted in the etching and pore-creating stage to improve the uniformity and consistency of the pores. These methods include the shape of an electrolytic electrode plate, electrode plate shielding, initial pore-creating current of the electrode plate, and power-off device at the end of the electrode plate. By improving the uniformity and consistency of the pores through these methods, the inner surface area of ​​the etched foil pores can be effectively increased, thereby improving the capacity of the etched foil.

[0003] Among the methods to improve the capacity of etched foil, improving the uniformity of the surface dimensions of both sides of the etched foil has been a bottleneck that researchers have long needed to overcome. The main way to overcome this bottleneck is to improve the current density of electronic aluminum foil during the initial, middle and final stages of energizing the graphite electrode.

[0004] However, current methods for measuring current density during the energizing process still suffer from low accuracy. Summary of the Invention

[0005] Therefore, it is necessary to provide a current density testing method, apparatus, computer equipment, computer-readable storage medium, and computer program product for an electrode foil corrosion production line that can improve the accuracy of current density measurement, in order to address the above-mentioned technical problems.

[0006] In a first aspect, this application provides a method for testing the current density of an electrode foil corrosion production line, comprising:

[0007] The electrolytic cell in the electrode foil corrosion production line is used to perform static corrosion testing on a stationary optical foil to obtain a statically corroded foil.

[0008] The sampling device in the control electrode foil corrosion production line uniformly divides and samples the static corrosion foil to obtain multiple corrosion foil samples. The weight loss of each corrosion foil sample after the static corrosion electrolysis test is compared with that before the static corrosion electrolysis test. The length of the foil matches the length of the electrode plate in the electrolytic cell, and each corrosion foil sample corresponds to each area of ​​the electrode plate.

[0009] For each etched foil sample, the current density of the etched foil sample is determined based on the weight loss of the etched foil sample and the preset production line current density, thus obtaining the current density corresponding to different areas of the electrode plate.

[0010] Secondly, this application also provides a current density testing device for an electrode foil corrosion production line, comprising:

[0011] The static testing module is used to control the electrolytic cell in the electrode foil corrosion production line to perform static corrosion testing on the stationary optical foil to obtain a statically corroded foil.

[0012] The etching foil sampling module is used to control the sampling device in the electrode foil etching production line to uniformly divide and sample the static etching foil to obtain multiple etching foil samples.

[0013] The weight acquisition module is used to acquire the weight loss of each etched foil sample after the static corrosion electrolysis test compared to before the static corrosion electrolysis test; the length of the foil matches the length of the electrode in the electrolytic cell, and each etched foil sample corresponds one-to-one with each region of the electrode;

[0014] The current density determination module is used to determine the current density of each etched foil sample based on the weight loss of the etched foil sample and the preset production line current density, thereby obtaining the current density corresponding to different regions of the electrode plate.

[0015] Thirdly, this application also provides a computer device, including a memory and a processor, wherein the memory stores a computer program, and the processor executes the computer program to implement the steps in any of the above embodiments of the electrode foil corrosion production line current density testing method.

[0016] Fourthly, this application also provides a computer-readable storage medium storing a computer program thereon, which, when executed by a processor, implements the steps in any of the above embodiments of the electrode foil corrosion production line current density testing method.

[0017] Fifthly, this application also provides a computer program product, including a computer program that, when executed by a processor, implements the steps in any of the above embodiments of the electrode foil corrosion production line current density testing method.

[0018] The aforementioned electrode foil corrosion production line current density testing method, apparatus, computer equipment, computer-readable storage medium, and computer program product first control the electrolytic cell in the electrode foil corrosion production line to perform a static corrosion and electrostatic test on a stationary optical foil, obtaining a statically corroded foil. Then, control the sampling device in the electrode foil corrosion production line to uniformly divide and sample the statically corroded foil, obtaining multiple corroded foil samples. The weight loss of each corroded foil sample after the static corrosion and electrostatic test compared to before the test is obtained. Thus, uniformly dividing and sampling facilitates the analysis of the corrosion and electrostatic treatment of the optical foil in different areas of the electrode plate. After assessing the quality, for each etched foil sample, the current density corresponding to the etched foil sample is determined based on the weight loss of the etched foil sample. This yields the current density corresponding to different areas of the electrolytic cell electrode plate. Compared to related technologies that calculate the current density by taking samples from the outlet of the electrolytic cell on the production line, this method can test the current density corresponding to different positions of the electrode plate in the electrolytic cell, improving the accuracy of the current density calculation. Furthermore, it is beneficial to guide and solve the problem of abnormal etched foil capacity and improve the porosity and depth based on accurate current density data. It is also beneficial to improve the etched foil capacity by adjusting the size of the shielding plate. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this application or related technologies, the drawings used in the description of the embodiments of this application or related technologies will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a diagram illustrating the application environment of a current density testing method for an electrode foil corrosion production line in one embodiment.

[0021] Figure 2 This is a schematic flowchart of a current density testing method for an electrode foil corrosion production line in one embodiment;

[0022] Figure 3 This is a flowchart illustrating the current density testing method for an electrode foil corrosion production line in another embodiment;

[0023] Figure 4 This is a flowchart illustrating the current density testing method for an electrode foil corrosion production line in a detailed embodiment.

[0024] Figure 5 This is a schematic diagram of current density sequence data in one embodiment;

[0025] Figure 6 This is a structural block diagram of a current density testing device for an electrode foil corrosion production line in one embodiment.

[0026] Figure 7 This is an internal structural diagram of a computer device in one embodiment. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0028] Electronic aluminum foil is a key raw material for the production of aluminum electrolytic capacitors. After aluminum is processed into foil, it undergoes surface etching and re-oxidation treatments, followed by winding to form the capacitor. The aluminum foil before etching is called bright foil, the etched aluminum foil is called etched foil, and the aluminum foil after re-oxidation is called finished foil.

[0029] In related technologies, methods for measuring the current density during the energizing process in an electrode foil corrosion production line include: Technical Solution 1: Taking samples of the etched foil from different outlets of the first and second electrolytic cells in the electrode foil production line, analyzing the porosity, pore diameter, and pore length of the foil after passing through the first and second electrolytic cells, thus determining whether the abnormality occurred in the first or second electrolytic porosity process. This method can only identify which electrolytic cell's etched foil is abnormal, but cannot determine which specific part of the cell is abnormal. Technical Solution 2: Taking finished etched foil from the foil receiving point of the production line for surface cross-sectional analysis. The disadvantage of this method is that it can only analyze the porosity, pore diameter, and pore length of the finished foil, but cannot determine which cell or location is abnormal.

[0030] The current density testing method for electrode foil corrosion production lines provided in this application can be applied to, for example... Figure 1 The application environment is shown. In this environment, the control terminal 102 communicates with the controller 104 of the electrode foil corrosion production system via a network. A data storage system can store the data that the control terminal 102 needs to process. The data storage system can be integrated into the control terminal 102 or placed in the cloud or on another network server.

[0031] Specifically, the operator can control the electrolytic cell in the electrode foil corrosion production line via control terminal 102 to perform a static corrosion test on the stationary optical foil, obtaining a static corrosion foil. Next, the sampling device in the electrode foil corrosion production line is controlled to uniformly divide and sample the static corrosion foil, obtaining multiple corrosion foil samples. The weight loss of each corrosion foil sample after the static corrosion test is obtained compared to before the static corrosion test. The length of the optical foil matches the length of the electrode plate in the electrolytic cell, and each corrosion foil sample corresponds one-to-one with each area of ​​the electrode plate. Finally, for each corrosion foil sample, the current density of the corrosion foil sample is determined based on the weight loss of the corrosion foil sample and the preset production line current density, obtaining the current density corresponding to different areas of the electrode plate.

[0032] The control terminal 102 can be, but is not limited to, various personal computers, laptops, smartphones, and tablets.

[0033] In one exemplary embodiment, such as Figure 2 As shown, a method for testing the current density in an electrode foil corrosion production line is provided, and this method is applied to... Figure 1 Taking control terminal 102 as an example, the explanation includes the following steps (hereinafter referred to as S): S200 to S600. Wherein:

[0034] S200, the electrolytic cell in the control electrode foil corrosion production line performs static corrosion testing on stationary optical foil to obtain static corrosion foil.

[0035] The electrode foil etching production line is used to etch and electrolyze aluminum foil, creating pores on the foil to form etched foil. The aluminum foil, which is untreated aluminum foil, is the substrate for manufacturing etched foil. Etched foil is aluminum foil that has undergone electrochemical etching to create tiny pores on its surface.

[0036] In this embodiment, the electrolytic cell in the etching production line is a primary electrolytic cell used for etching and creating pores in the optical foil. A secondary electrolytic cell is used for enlarging the pores in the etched foil. The primary electrolytic cell comprises multiple stages; exemplarily, it includes first-stage, second-stage, third-stage, fourth-stage, or fifth-stage cells. Each electrolytic cell contains conductive electrode plates (hereinafter referred to as electrode plates), which are installed inside the cell and used to apply current to the optical foil, driving the etching reaction. For example, the electrode plates are graphite electrode plates made of high-purity graphite.

[0037] In practical applications, the controller pre-controls process parameters such as the temperature of the electrolyzer and the acidity of the electrolyte within preset standard process parameter ranges. The standard process parameter ranges corresponding to each process parameter are set according to actual production needs.

[0038] In specific implementation, depending on the testing requirements, the control terminal can control the transmission mechanism to convey the optical foil to any cell in the electrolytic cell. For example, in this embodiment, the optical foil thickness is 135 μm (micrometers), and the electrode length is 180 cm. The process parameters of the electrolytic cell are pre-controlled within a preset standard process parameter range; for example, the electrolytic cell temperature is 72°C, and the total acidity is 8.5 N (equivalent concentration). Subsequently, after the control terminal controls the transmission mechanism to transfer the optical foil into the fourth-stage cell of an electrolytic cell, the static corrosion electrolysis test can include: controlling the transmission mechanism to stop transmission, and controlling the fourth-stage cell of an electrolytic cell to perform a static corrosion electrolysis test on the optical foil according to preset control parameters. The control parameters include current and electrolysis duration. For example, the total current in the electrolytic cell is controlled to reach 1600 A, and after 8 seconds of constant current, the power is cut off. At this time, the control transmission mechanism starts transmission, pulling the statically etched foil to the foil winding machine for winding, ensuring that the foil roll is completely clean and dry, and maintaining the flatness of the foil roll.

[0039] S400, the sampling device in the control electrode foil corrosion production line uniformly divides and samples the static corrosion foil to obtain multiple corrosion foil samples. The weight loss of each corrosion foil sample after static corrosion and energization is obtained compared with that before static corrosion and energization. The length of the foil matches the length of the electrode plate in the electrolytic cell. Each corrosion foil sample corresponds one-to-one with each area of ​​the electrode plate.

[0040] The sampling device can be a mold used to cut and sample statically etched foil.

[0041] In practical applications, following the steps described above, the wound static corrosion foil is placed on the operating platform and unwound, with the length of the static corrosion foil to be sampled matching the length of the electrode plate. The static corrosion foil can be evenly longitudinally divided according to the length of the electrolytic cell electrode plate to obtain multiple corrosion foil samples of the same size. For example, to improve the integrity of the corrosion foil samples, longitudinal sampling can be performed on the left and right sides of the static corrosion foil. The size of the extracted corrosion foil samples is determined according to the length of the electrolytic cell electrode plate. For example, the sample size is 1cm * 15cm, resulting in 180 corrosion foil samples with a length of 1cm and a width of 15cm. Sampling can be done by taking samples at intervals, assigning numbers to the samples. Samples taken from the left are assigned odd-numbered numbers, such as 1, 3, 5, 7…179. Samples taken from the right are assigned odd-numbered numbers, such as 2, 4, 6, 8…180.

[0042] After sampling, each etched foil sample was weighed using an electronic balance to obtain its weight. The difference between the weight of each etched foil sample and the pre-weighed weight of the smooth foil sample was calculated to determine the weight loss of the etched foil sample before and after the static corrosion and electrostatic test. The smooth foil sample was the same size as the etched foil sample. The accuracy of the electronic balance was 0.0001g.

[0043] S600 determines the current density of each etched foil sample based on the sample's weight loss and the preset production line current density, thus obtaining the current density of different areas of the electrode plate.

[0044] The preset production line current density characterizes the current passing through a unit area of ​​foil in an actual electrode foil etching production line. The preset production line current density can be determined based on the total current applied to the foil during dynamic etching and the area of ​​the foil in the actual production process.

[0045] In practical applications, the total current of the electrolytic cell during the actual operation of the corrosion production line and the area of ​​the foil are obtained in advance. The ratio of the total current to the area of ​​the foil is calculated to obtain the power density of the production line.

[0046] In practice, Faraday's law can be used to determine the charge per square centimeter of the etched foil sample based on the weight loss. Then, the charge per square centimeter is converted to current per square centimeter based on the production line current density, yielding the current density corresponding to the etched foil sample. In actual operation, the shape of the electrolytic cell electrode plate may be irregular. In this embodiment, the length of the statically etched foil is the same as the maximum length of the electrolytic cell electrode plate, and correspondingly, its width is the same as the maximum width of the electrolytic cell electrode plate. Thus, each sliced ​​etched foil sample covers a different area of ​​the electrolytic cell electrode plate. Obtaining the current density corresponding to each etched foil sample yields the current density for different areas of the electrolytic cell electrode plate. However, because the electrolytic cell electrode plate is irregularly shaped in actual production, the current is highest at the inlet of the foil, resulting in more severe corrosion.

[0047] In the aforementioned current density testing method for an electrode foil corrosion production line, firstly, the electrolytic cell in the electrode foil corrosion production line is controlled to perform a static corrosion and electrostatic test on a stationary optical foil, resulting in a statically corroded foil. Subsequently, the sampling device in the electrode foil corrosion production line is controlled to uniformly divide and sample the statically corroded foil, obtaining multiple corroded foil samples. The weight loss of each corroded foil sample after the static corrosion and electrostatic test compared to before the static corrosion and electrostatic test is obtained. Thus, uniformly dividing and sampling is beneficial for analyzing the quality of corrosion and electrostatic treatment of the optical foil in different areas of the electrode plate. Then, for each corroded foil sample, the current density corresponding to the corroded foil sample is determined based on the weight loss of the corroded foil sample, obtaining the current density corresponding to different areas of the electrolytic cell electrode plate. Compared with related technologies that calculate the current density by taking samples from the outlet of the electrolytic cell in the production line, this method can test the current density corresponding to different positions of the electrode plate in the electrolytic cell, improving the accuracy of current density calculation. Furthermore, it is beneficial to guide and solve the problem of abnormal corrosion foil capacity and improve the porosity and depth based on accurate current density data. It is also beneficial to improve the corrosion foil capacity by adjusting the size of the shielding plate.

[0048] In one exemplary embodiment, such as Figure 3 As shown, the current density of the etched foil sample is determined based on the weight loss of the etched foil sample and the preset production line current density, including S620 to S660. Wherein:

[0049] S620: The charge of the etched foil sample is obtained based on the weight loss of the etched foil sample.

[0050] In practice, the Faraday constant is introduced. The amount of electricity passed through the corrosion foil sample is determined based on the weight loss of the sample, the molecular weight of aluminum, and the charge number of aluminum. The Faraday constant is an electrochemical constant that links the amount of electricity to the amount of reactants, used to calculate the relationship between the amount of electricity consumed and the mass of the products during electrolysis. The Faraday constant is 96485, the molecular weight of aluminum is 27, and the charge number of aluminum is 3. Specifically, for each corrosion foil sample, the amount of electricity passed through = (weight loss / molecular weight of aluminum) * Faraday constant * charge number of aluminum = (weight loss / 27) * 96485 * 3 = 10720.56 * weight loss, in coulombs (C).

[0051] S640: Obtain the area of ​​the etched foil sample, determine the ratio of charge to area, and obtain the charge density of the etched foil sample.

[0052] The charge density of the etched foil represents the amount of charge passed through the etched foil per square centimeter.

[0053] In practice, the charge density of the etched foil is determined based on the ratio of the charge passed through the foil to its area. Specifically, for each etched foil sample, the charge density = 10720.56 * weight loss / 15 (cm²) 2 = 714.7 * energy loss, in coulombs / cm² 2 .

[0054] S660 determines the current density of the etched foil sample based on the preset production line current density, current density, and static corrosion energizing duration.

[0055] In this embodiment, the charge density of the corrosion foil sample obtained after the static corrosion electrolysis test is converted into the current density of the corrosion foil in the electrolytic cell during normal operation of the corrosion production line in the actual production process, so as to obtain the current density corresponding to the corrosion foil sample and evaluate the quality of the corrosion foil in the actual production process.

[0056] In practical applications, the average charge density of each etched foil sample is predetermined. In specific implementation, for each etched foil sample, the corresponding current density is calculated as follows: (charge density of the production line * charge density of the etched foil sample) / (average charge density * total power-on time for each stage).

[0057] In this embodiment, by using Faraday's law and the production line's electrical density, the electrical density obtained from the static corrosion-electrode test is converted into the current density at different positions of the electrode plate under dynamic corrosion-electrode conditions during production line operation, thereby improving the accuracy of current density determination.

[0058] In one exemplary embodiment, after obtaining the current density in different regions of the electrode, the method further includes:

[0059] The time when the light foil region to which each etched foil sample belongs enters the electrolytic cell is determined. Based on the time when the light foil region to which each etched foil sample belongs enters the electrolytic cell, the current densities are integrated to obtain the current density sequence data.

[0060] In this embodiment, since the size of the sampled static corrosion foil matches the size of the electrolytic cell, and the multiple corrosion foil samples obtained cover different areas of the electrolytic cell electrode plate, by determining the moment when the light foil area to which the corrosion foil sample belongs enters the electrolytic cell before the static corrosion and electrolysis test, the current densities corresponding to different areas of the electrode plate can be integrated to obtain the current density corresponding to different areas of the electrode plate.

[0061] In specific implementation, the time when the foil to which each etched foil sample belongs enters the electrolytic cell can be determined as follows: Time when the foil to which each etched foil sample belongs enters the electrolytic cell = (Length of the foil area already in the electrolytic cell + Length of the foil to which the current etched foil sample belongs) / Transmission speed of the transmission mechanism * 60, in seconds. For example, the time when the foil area to which the 21st etched foil sample belongs enters the electrolytic cell = (20 * 1 + 1) / 4.5 * 60, where 4.5 m / min is the transmission speed of the transmission mechanism in the electrode foil etching production line, and 60 is min converted to seconds. Subsequently, the current density of the etched foil samples is sorted according to the time when the foil area to which the etched foil sample belongs enters the electrolytic cell, resulting in a current density sequence data.

[0062] If the size of the electrode shield needs to be adjusted based on the current density sequence data, a shield size adjustment suggestion is pushed until the current density sequence data matches the preset standard current density sequence data.

[0063] The shielding plate in the electrolytic cell can be a baffle installed in a specific area of ​​the electrode plate to adjust the current distribution. The preset standard current density sequence data can be the current density sequence data that maximizes the capacity of the etched foil. It can be the current density sequence data that maximizes the capacity of the etched foil obtained in advance through multiple static corrosion energization tests, current density calculations, and electrode plate shielding plate size adjustments, and this current density sequence data is set as the standard current density sequence data.

[0064] In practical applications, the decision to adjust the size of the electrode shield is first made based on the current density sequence data. Specifically, this can be achieved by detecting the trend of the current density sequence data. If the change in current density within a preset time period exceeds a preset threshold, there may be areas with abnormally high or low current densities. In such cases, it is determined that the size of the electrode shield needs to be adjusted. The recommended adjustment can be to increase or decrease the size and number of openings in the electrode corresponding to the areas where the change in current density exceeds the preset threshold. This size adjustment recommendation is then pushed to the user end until the current density sequence data matches the preset standard current density sequence data.

[0065] In this embodiment, based on the converted current density sequence at different positions of the electrode plate, it is detected whether the shield plate needs to be adjusted, and adjustment suggestions are automatically generated, which improves the intelligence of current density adjustment in the production line.

[0066] In one exemplary embodiment, before determining that the size of the electrode shield needs to be adjusted based on the current density sequence data, the method further includes:

[0067] If a target current density exists in the current density sequence data that is not within the preset current density range, then the size of the electrode shield plate needs to be adjusted.

[0068] The preset current density range characterizes the range of normal current density. This range can be determined based on historical current density data and process requirements.

[0069] In practice, this can be achieved by matching each current density in the current density sequence data with a preset current density range, detecting whether the current density falls within the preset range, and identifying the target current density if it does not. If a target current density exists in the current density sequence data, the size of the electrode shield needs adjustment. Understandably, if the target current density exceeds the normal current density range, it indicates that the number of holes in the corresponding target area of ​​the electrode shield needs to be increased; conversely, if the target current density is below the lower limit of the normal current density range, it indicates that the number of holes in the corresponding target area of ​​the electrode shield needs to be reduced.

[0070] In this embodiment, by matching the preset current density range and current density sequence data, it is determined that the size of the electrode shield needs to be adjusted, which improves the detection efficiency.

[0071] In one exemplary embodiment, before pushing the shielding plate size adjustment suggestion, the method further includes:

[0072] Based on the etched foil sample corresponding to the target current density, determine the target area to be adjusted in the electrode shielding plate. The recommended adjustment of the shielding plate size includes the target area in the electrode shielding plate.

[0073] The target area can be the region in the electrode shielding plate that represents the through-hole ratio or through-hole size to be adjusted.

[0074] In practice, based on the etched foil sample to which the target current density belongs and the corresponding area of ​​the optical foil, the electrode area corresponding to the target current density is determined, where the positions of the electrode and the electrode shielding plate are matched. Thus, after determining the electrode area corresponding to the target current density, the target area to be adjusted within the electrode shielding plate is determined.

[0075] In this embodiment, by determining the target area, it is beneficial to adjust the current density of the etching foil to the normal current density range by increasing or decreasing the porosity of the target area, thereby improving the quality of the etching foil.

[0076] The capacity of an aluminum electrolyzer primarily depends on the effective surface area of ​​the aluminum foil—the larger the surface area, the more charge it can adsorb, and thus the higher the capacity. In other embodiments, after each adjustment of the shielding plate size according to the recommended size adjustment, the surface area of ​​the etched foil is calculated. Then, returning to the above embodiment of the electrode foil corrosion production line current density testing method, according to preset control parameters, the electrolytic cell in the electrode foil corrosion production line is controlled to perform a static corrosion and electrostatic test on the stationary foil, obtaining the static etched foil. This process continues until the surface area reaches the ideal target value and the target current density is not present in the current density sequence data, thus obtaining standard current density sequence data. This is beneficial for improving the capacity of the aluminum electrolyzer.

[0077] In one exemplary embodiment, after obtaining the current density sequence data, the method further includes:

[0078] The current density sequence data is compared with the preset standard current density sequence data to obtain the comparison results.

[0079] Based on the comparison results, adjustment suggestions for the electrode shielding plate are generated.

[0080] In practical applications, the control unit can compare the current density sequence data with a preset standard current density sequence data to obtain the comparison result. Adjusting the electrode shielding plate based on the comparison result can include analyzing the reasons for the differences between the current density sequence data and the standard current density sequence data, and generating adjustment suggestions for the electrode shielding plate based on the reasons. Specifically, if the comparison result indicates that the current density sequence data has excessively high current density at the edges compared to the standard current density sequence data, the reason for the difference may be insufficient shielding, and the adjustment suggestion for the electrode shielding plate may include increasing the length of the shielding plate. If the comparison result indicates that there are areas in the current density sequence data where the current density is lower than the standard current density sequence data, the reason for the difference may be shielding plate deformation or excessive shielding, and the adjustment suggestion for the electrode shielding plate may include increasing the permeability of the shielding plate. If the comparison result indicates that the current density sequence data is generally higher or lower than the standard current density sequence data, the reason for the difference may be an improper setting of the total current of the electrolyzer, and an electrolyzer current adjustment suggestion is generated.

[0081] In this embodiment, by comparing with standard current density sequence data, adjusting the electrode shielding plate is beneficial to improving the capacity of the etched foil.

[0082] To provide a clearer explanation of the current density testing method for the electrode foil corrosion production line provided in this application, a specific embodiment and accompanying drawings are described below. Figure 4 The specific embodiment includes the following steps:

[0083] S1, the electrolytic cell in the control electrode foil corrosion production line performs a static corrosion test on the stationary optical foil to obtain a static corrosion foil.

[0084] S2, the sampling device in the control electrode foil corrosion production line uniformly divides and samples the static corrosion foil to obtain multiple corrosion foil samples. The weight loss of each corrosion foil sample after corrosion and static testing is obtained compared to before corrosion and static testing. The length of the foil matches the length of the electrode plate in the electrolytic cell, and each corrosion foil sample corresponds one-to-one with each area of ​​the electrode plate.

[0085] S3. Based on the weight loss of the etched foil sample, obtain the charge of the etched foil sample, acquire the area of ​​the etched foil sample, determine the ratio of charge to area, and obtain the charge density of the etched foil sample.

[0086] S4. Determine the current density of the etched foil sample based on the preset production line power density, power density, and static corrosion energizing duration.

[0087] S5. Determine the time when the light foil region to which each etched foil sample belongs enters the electrolytic cell, and integrate the current densities according to the time when the light foil region to which each etched foil sample belongs enters the electrolytic cell to obtain current density sequence data.

[0088] S6. If there is a target current density in the current density sequence data that is not within the preset current density range, then it is determined that the size of the electrode shield plate needs to be adjusted.

[0089] S7. Based on the etched foil sample to which the target current density belongs, determine the target area to be adjusted in the electrode shielding plate. The shielding plate size adjustment suggestion includes the target area of ​​the electrode shielding plate. Push the shielding plate size adjustment suggestion until the current density sequence data matches the preset standard current density sequence data.

[0090] An example is used to illustrate the current density testing method for an electrode foil corrosion production line:

[0091] 1. Static electrochemical treatment of the foil is performed using an electrolytic cell in the etching production line:

[0092] Using 135μm thick optical foil, a static electrolytic corrosion test was conducted on the foil during the production line startup process using an electrolytic cell.

[0093] (1) The foil enters the fourth stage of the electrolytic cell from the foil feeding machine for electrolysis. At this time, the process parameters such as temperature and acidity of the electrolytic cell must be within the range of the process card. The temperature is 72℃, the total acidity is 8.5N, and the electrode length is 180cm.

[0094] (2) Stop the production line drive, and at the same time quickly increase the total current of the electrolytic cell to 1600A, maintain the constant current for 8s, cut off the power, quickly turn on the drive, and pull the static foil to the foil winding machine through the production line drive to ensure that the foil roll is completely clean and completely dry, and keep the foil roll flat.

[0095] 2. Sampling of statically etched foil:

[0096] (1) Spread the rolled static corrosion foil on a flat table. Based on the production line electrode plate length of 180cm, start sampling from the inlet power application point. Since the electrode plate is an irregularly shaped electrode plate and the current is the largest at the inlet power application point, the corrosion is more severe here.

[0097] (2) In order to ensure the integrity of the sample, 1cm*15cm corrosion foil samples were taken longitudinally from the left and right sides of the static corrosion foil. A special mold was used for sampling, and one sample was taken at a time. The samples taken from the left side were marked with odd numbers such as 1, 3, 5, 7...179; the samples taken from the right side were marked with even numbers such as 2, 4, 6, 8...180.

[0098] 3. Calculation of weight loss and charge of static corrosion foil:

[0099] (1) Weigh the selected sample pieces using an electronic balance with an accuracy of 0.0001g to ensure the accuracy of the foil weighing. The number of sample pieces tested is 180.

[0100] (2) Based on the difference between the weight W1 of the etched foil sample and the weight W0 of the light foil sample, the Faraday constant is substituted, and the electrical charge is converted into the current density of the normal production line.

[0101] ①: The charge of the etched foil sample = ((weight of the foil - weight of the static foil) / molecular mass of Al) * Faraday constant * number of Al charges = ((W0-W1) / 27) * 96485 * 3 = 10720.56 * (W0-W1), in coulombs C.

[0102] ②: Calculate the charge density per square centimeter of the etched foil sample = charge density per etched foil sample / area = 10720.56 * (W0 - W1) / 15 (cm2) = 714.7 * (W0 - W1), unit: coulombs / cm2.

[0103] ③: Convert to production line current density = (production line power density * power density) / (average power density * total power-on time for each stage), unit A / cm2.

[0104] ④: Calculate the time for the area of ​​the etched foil sample to enter the electrolytic cell = etched foil sample number / 4.5 * 60, in seconds, where 4.5 m / min is the production line speed and 60 is min converted to seconds.

[0105] In practical applications, the corresponding foil region and electrode region of each etched foil sample are matched one-to-one. After obtaining the current density corresponding to each etched foil sample, the current density, weight, charge, and charge density of each etched foil sample are integrated according to the moment the foil enters the electrolytic cell, resulting in the following table (due to the large amount of data, only the data calculated for the first 5 seconds are listed):

[0106]

[0107] Here, the electrode position represents the electrode region at a distance from the electrode at the inlet of the electrolytic cell. Based on the current density corresponding to the moment the light foil enters the electrolytic cell, a current density curve for the electrode is generated, as shown below. Figure 5 As shown, the X-axis represents time in seconds, and the Y-axis represents current density in A / cm². 2 .

[0108] It should be understood that although the steps in the flowcharts of the embodiments described above are shown sequentially according to the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless explicitly stated herein, there is no strict order restriction on the execution of these steps, and they can be executed in other orders. Moreover, at least some steps in the flowcharts of the embodiments described above may include multiple steps or multiple stages. These steps or stages are not necessarily completed at the same time, but can be executed at different times. The execution order of these steps or stages is not necessarily sequential, but can be performed alternately or in turn with other steps or at least some of the steps or stages of other steps.

[0109] In one exemplary embodiment, such as Figure 6 As shown, a current density testing device 600 for an electrode foil corrosion production line is provided, comprising: a static testing module 610, a corrosion foil sampling module 620, a weight acquisition module 630, and a current density determination module 640, wherein:

[0110] The static test module 610 is used to control the electrolytic cell in the electrode foil corrosion production line to perform static corrosion testing on the stationary optical foil to obtain a static corrosion foil.

[0111] The etching foil sampling module 620 is used to control the sampling device in the electrode foil etching production line to uniformly divide and sample the static etching foil to obtain multiple etching foil samples.

[0112] The weight acquisition module 630 is used to acquire the weight loss of each etched foil sample after the static corrosion electrolysis test compared to before the static corrosion electrolysis test; the length of the foil matches the length of the electrode in the electrolytic cell, and each etched foil sample corresponds one-to-one with each area of ​​the electrode;

[0113] The current density determination module 640 is used to determine the current density of each etched foil sample based on the weight loss of the etched foil sample and the preset production line current density, thereby obtaining the current density corresponding to different areas of the electrode plate.

[0114] In an exemplary embodiment, the current density determination module 640 is further configured to obtain the charge of the etched foil sample based on the weight loss of the etched foil sample; obtain the area of ​​the etched foil sample, determine the ratio of charge to area, and obtain the charge density of the etched foil sample; and determine the current density of the etched foil sample based on the preset production line charge density, charge density, and static corrosion energizing duration.

[0115] In one exemplary embodiment, the electrode foil corrosion production line current density testing device 600 further includes an adjustment suggestion push module 650:

[0116] The current density determination module 640 is also used to determine the time when the light foil region to which each etched foil sample belongs enters the electrolytic cell, and integrates the current densities according to the time when the light foil region to which each etched foil sample belongs enters the electrolytic cell to obtain current density sequence data.

[0117] The adjustment suggestion push module 650 is used to push a shield size adjustment suggestion when it is determined from the current density sequence data that the size of the electrode shield in the electrolytic cell needs to be adjusted, until the current density sequence data matches the preset standard current density sequence data.

[0118] In an exemplary embodiment, the adjustment suggestion push module 650 is further configured to determine that the size of the electrode shield plate needs to be adjusted if there is a target current density in the current density sequence data that is not within the preset current density range.

[0119] In an exemplary embodiment, the adjustment suggestion push module 650 is further configured to determine the target area to be adjusted in the electrode shielding plate based on the etched foil sample to which the target current density belongs; the shielding plate size adjustment suggestion includes the target area of ​​the electrode shielding plate.

[0120] In an exemplary embodiment, the adjustment suggestion push module 650 is further configured to compare the current density sequence data with the preset standard current density sequence data to obtain the comparison result; and generate an adjustment suggestion for the electrode shielding plate based on the comparison result.

[0121] Each module in the aforementioned electrode foil corrosion production line current density testing device 600 can be implemented entirely or partially through software, hardware, or a combination thereof. These modules can be embedded in or independent of the processor in a computer device in hardware form, or stored in the memory of a computer device in software form, so that the processor can call and execute the operations corresponding to each module.

[0122] In one exemplary embodiment, a computer device is provided, which may be a server, and its internal structure diagram may be as follows: Figure 7 As shown, this computer device includes a processor, memory, input / output (I / O) interfaces, and a communication interface. The processor, memory, and I / O interfaces are connected via a system bus, and the communication interface is also connected to the system bus via the I / O interfaces. The processor provides computational and control capabilities. The memory includes non-volatile storage media and internal memory. The non-volatile storage media stores the operating system, computer programs, and a database. The internal memory provides the environment for the operation of the operating system and computer programs stored in the non-volatile storage media. The database stores data. The I / O interfaces are used for exchanging information between the processor and external devices. The communication interface is used for communication with external terminals via a network connection. When the computer program is executed by the processor, it implements a current density testing method for an electrode foil corrosion production line.

[0123] Those skilled in the art will understand that Figure 7 The structure shown is merely a block diagram of a portion of the structure related to the present application and does not constitute a limitation on the computer device to which the present application is applied. Specific computer devices may include more or fewer components than those shown in the figure, or combine certain components, or have different component arrangements.

[0124] In one exemplary embodiment, a computer device is provided, including a memory and a processor, wherein the memory stores a computer program, and the processor executes the computer program to implement the steps in any of the above embodiments of the electrode foil corrosion production line current density testing method.

[0125] In one embodiment, a computer-readable storage medium is provided, on which a computer program is stored, which, when executed by a processor, implements the steps in any of the above embodiments of the electrode foil corrosion production line current density testing method.

[0126] In one embodiment, a computer program product is provided, including a computer program that, when executed by a processor, implements the steps in any of the above embodiments of the electrode foil corrosion production line current density testing method.

[0127] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for analysis, data stored, data displayed, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties, and the collection, use and processing of the relevant data must comply with relevant regulations.

[0128] Those skilled in the art will understand that all or part of the processes in the methods of the above embodiments can be implemented by a computer program instructing related hardware. The computer program can be stored in a non-volatile computer-readable storage medium, and when executed, it can include the processes of the embodiments of the above methods. Any references to memory, databases, or other media used in the embodiments provided in this application can include at least one of non-volatile memory and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. By way of illustration and not limitation, RAM can take many forms, such as Static Random Access Memory (SRAM) or Dynamic Random Access Memory (DRAM). The databases involved in the embodiments provided in this application may include at least one type of relational database and non-relational database. Non-relational databases may include, but are not limited to, blockchain-based distributed databases. The processors involved in the embodiments provided in this application may be general-purpose processors, central processing units, graphics processing units, digital signal processors, programmable logic devices, quantum computing-based data processing logic devices, artificial intelligence (AI) processors, etc., and are not limited to these.

[0129] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this application.

[0130] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this application should be determined by the appended claims.

Claims

1. A method for testing the current density of an electrode foil corrosion production line, characterized in that, The method includes: The electrolytic cell in the electrode foil corrosion production line is used to perform static corrosion testing on a stationary optical foil to obtain a statically corroded foil. The sampling device in the control electrode foil corrosion production line uniformly divides and samples the static corrosion foil to obtain multiple corrosion foil samples. The weight loss of each corrosion foil sample after the static corrosion electrolysis test is obtained compared with that before the static corrosion electrolysis test. The length of the foil matches the length of the electrode plate in the electrolytic cell, and each corrosion foil sample corresponds one-to-one with each region of the electrode plate. For each etched foil sample, the current density of the etched foil sample is determined based on the weight loss of the etched foil sample and the preset production line current density, thereby obtaining the current density of different regions of the electrode plate.

2. The method according to claim 1, characterized in that, The step of determining the current density of the etched foil sample based on the weight loss of the etched foil sample and the preset production line current density includes: The charge of the etched foil sample is obtained based on the weight loss of the etched foil sample. The area of ​​the etched foil sample is obtained, the ratio of the charge to the area is determined, and the charge density of the etched foil sample is obtained. The current density of the etched foil sample is determined based on the preset production line power density, the power density, and the duration of static corrosion energization.

3. The method according to claim 1, characterized in that, After obtaining the current density in different regions of the electrode, the method further includes: The time when the light foil region to which each of the etched foil samples belongs enters the electrolytic cell is determined, and the current densities are integrated according to the time when the light foil region corresponding to each of the etched foil samples enters the electrolytic cell to obtain current density sequence data; If it is determined from the current density sequence data that the size of the electrode shield in the electrolytic cell needs to be adjusted, a shield size adjustment suggestion is pushed until the current density sequence data matches the preset standard current density sequence data.

4. The method according to claim 3, characterized in that, Before determining that the size of the electrode shield needs to be adjusted based on the current density sequence data, the method further includes: If a target current density that is not within the preset current density range exists in the current density sequence data, then it is determined that the size of the electrode shield plate needs to be adjusted.

5. The method according to claim 4, characterized in that, Before suggesting the adjustment of the size of the push shield plate, the method further includes: Based on the etched foil sample corresponding to the target current density, determine the target area to be adjusted in the electrode shielding plate; the proposed shielding plate size adjustment includes the target area of ​​the electrode shielding plate.

6. The method according to any one of claims 3 to 5, characterized in that, After obtaining the current density sequence data, the method further includes: The current density sequence data is compared with a preset standard current density sequence data to obtain the comparison result; Based on the comparison results, adjustment suggestions for the electrode shielding plate are generated.

7. A current density testing device for an electrode foil corrosion production line, characterized in that, The device includes: The static testing module is used to control the electrolytic cell in the electrode foil corrosion production line to perform static corrosion testing on the stationary optical foil to obtain a statically corroded foil. The etching foil sampling module is used to control the sampling device in the electrode foil etching production line to uniformly divide and sample the static etching foil to obtain multiple etching foil samples. The weight acquisition module is used to acquire the weight loss of each etched foil sample after the static corrosion electrolysis test compared to before the static corrosion electrolysis test; the length of the foil matches the length of the electrode in the electrolytic cell, and each etched foil sample corresponds one-to-one with each region of the electrode; The current density determination module is used to determine the current density of each etched foil sample based on the weight loss of the etched foil sample and the preset production line current density, thereby obtaining the current density corresponding to different regions of the electrode plate.

8. A computer device comprising a memory and a processor, wherein the memory stores a computer program, characterized in that, When the processor executes the computer program, it implements the steps of the method according to any one of claims 1 to 6.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by a processor, it implements the steps of the method according to any one of claims 1 to 6.

10. A computer program product, comprising a computer program, characterized in that, When the computer program is executed by a processor, it implements the steps of the method according to any one of claims 1 to 6.

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