Manufacturing method of military capacitor electrode foil

Abstract

The invention relates to the technical field of military industry capacitor electrode foils, and discloses a military industry capacitor electrode foil manufacturing method, which comprises: S1, raw material preparation: selecting a high-performance raw material: selecting a high-purity and low-impurity aluminum foil as a raw material, and ensuring the basic performance of the electrode foil; s2, pretreatment: ultrasonic cleaning is adopted, and a nanoscale cleaning agent and a surfactant are added during cleaning, so that impurities such as oil stains and oxides on the surface of the aluminum foil are removed more thoroughly; according to the manufacturing method of the electrode foil of the capacitor for the military industry, the produced electrode foil has excellent electrical performance, thermal stability and mechanical performance, the strict requirement of the capacitor for the military industry for the high-performance electrode foil can be met, the purity and the stability of the electrode foil are remarkably improved through the strict cleaning and post-treatment process, and the electrode foil is suitable for popularization and application. The electrode foil is ensured to have high reliability in the use process, and the optimization of the corrosion process enables the electrode foil to have higher specific surface area and capacitance, so that the energy density of the capacitor is improved.

Description

Technical Field

[0001] The invention relates to the technical field of capacitor electrode foil for military use, and in particular to a method for manufacturing capacitor electrode foil for military use. Background Art

[0002] Military capacitor electrode foil focuses on improving capacitor performance to meet the military's demand for high-stability, high-reliability electronic equipment. With the rapid development of national defense science and technology, the performance requirements for capacitors have become increasingly stringent, especially in harsh environments such as high temperature, high humidity, and strong vibration. The stability and reliability of capacitors are directly related to the performance of the entire electronic system. Military capacitor electrode foil is a key component of the capacitor.

[0003] In the traditional manufacturing method of capacitor electrode foil for military use, there may be a lack of sufficient pretreatment of the raw material aluminum foil. For example, incomplete cleaning will lead to residual impurities on the surface of the aluminum foil, affecting the effect of subsequent electrochemical corrosion and the quality of the electrode foil. The selection of high-purity raw materials may not have received enough attention, resulting in limited basic performance of the electrode foil. Electrochemical corrosion and pore corrosion process limitations: The traditional electrochemical corrosion process may lack precise control, resulting in uneven corrosion on the surface of the aluminum foil, affecting the specific surface area and capacitance performance of the electrode foil. The pore corrosion technology may be relatively backward and cannot achieve precise control of the micropores on the surface of the aluminum foil, limiting the improvement of the performance of the electrode foil. Insufficient pore expansion corrosion and post-processing process: The pore expansion corrosion process may lack optimization, resulting in micropores on the surface of the aluminum foil. Uneven hole expansion affects the bending strength and capacitance performance of the electrode foil. The post-processing process may lack annealing or the annealing conditions may be improperly controlled, resulting in the failure to optimize the microstructure and performance of the electrode foil. Production efficiency and cost control issues: Traditional manufacturing methods may rely on manual operation, with low production efficiency and difficulty in ensuring the consistency of product quality. The lack of intelligent and automated technology leads to high production costs and difficulty in meeting the needs of large-scale production. Lack of online monitoring and control systems: There may be a lack of online monitoring systems during the manufacturing process, and key parameters such as temperature and current density cannot be monitored in real time, resulting in poor production stability and controllability. The manufacturing process of the electrode foil cannot be accurately controlled, increasing product scrap rates and resource waste.

[0004] Therefore, we propose a method for manufacturing capacitor electrode foil for military use. Summary of the invention

[0005] To achieve the above object, the present invention provides the following technical solution: a method for manufacturing a capacitor electrode foil for military use, comprising the following steps:

[0006] S1: Prepare raw materials: Select high-performance raw materials: Use high-purity, low-impurity aluminum foil as raw materials to ensure the basic performance of electrode foil;

[0007] S2: Pretreatment: Ultrasonic cleaning is used, and nano-level detergents and surfactants are added during cleaning to more thoroughly remove impurities such as oil, oxides, etc. on the surface of the aluminum foil, thereby improving the efficiency and quality of subsequent treatment;

[0008] S3: Electrochemical corrosion: By adjusting the formula of the electrochemical corrosion solution and the corrosion conditions (such as temperature, current density, etc.), the corrosion process is optimized to achieve uniform corrosion on the surface of the aluminum foil and improve the specific surface area and capacitance performance of the electrode foil;

[0009] S4: Optimization of pore etching process: Introduce laser drilling or micro-nano processing technology to achieve precise control of micropores on the surface of aluminum foil and further improve the performance of electrode foil;

[0010] S5: Optimization of hole expansion corrosion process: Adopting the DC hole expansion with large current and short time corrosion method, combined with the use of additives, to achieve uniform expansion of micropores on the surface of aluminum foil, and improve the bending strength and capacitance performance of electrode foil;

[0011] S6: Post-processing process innovation: Introduce annealing treatment in the post-processing process, optimize the microstructure and performance of the electrode foil by controlling the annealing temperature and time, and improve the strength and stability of the electrode foil;

[0012] S7: Introducing intelligent manufacturing technology: By introducing intelligent manufacturing technology, such as robots and automated production lines, the electrode foil manufacturing process can be automated and intelligentized to improve production efficiency and product quality;

[0013] S8: Establish an online monitoring system: Establish an online monitoring system to monitor the key parameters (such as temperature, current density, etc.) in the electrode foil manufacturing process in real time to ensure the stability and controllability of the manufacturing process;

[0014] S9: Quality sampling and performance testing: Regular quality sampling is carried out on the produced electrode foil to ensure that its performance and quality meet the requirements; a series of performance tests (such as capacitance performance, flexural strength, etc.) are carried out on the electrode foil to ensure that it meets the use requirements of military capacitors, and finally the manufacture of the electrode foil is completed.

[0015] Preferably, the raw material in step S1 is high-purity aluminum foil: as the main raw material of the electrode foil, high-purity (such as 99.99% and above) aluminum foil is selected to ensure the basic performance of the electrode foil. The thickness of the aluminum foil in step S1 can be selected according to specific application requirements, and the general range is between tens of microns and hundreds of microns.

[0016] Preferably, in step S3, according to the needs of electrochemical corrosion and pitting corrosion, a suitable electrolyte formula is selected, which usually includes acid, salt and other additives, and the electrolyte concentration: the ratio of each component in the electrolyte (such as the ratio of acid to salt) needs to be precisely controlled to ensure the stability and controllability of the electrochemical corrosion and pitting corrosion process.

[0017] Preferably, the pretreatment in step S2 also includes surface treatment, and the surface of the aluminum foil is micro-treated (such as grinding, polishing) as needed to improve its surface properties.

[0018] Preferably, the current density in steps S3 and S4 is controlled within a certain range, such as 120-400 mA / cm 2 , ensure uniform corrosion on the surface of the aluminum foil; temperature: set an appropriate temperature, such as 50-80℃, to promote the corrosion reaction; pore corrosion: pore forming agent: select a suitable pore forming agent to form uniform micropores on the surface of the aluminum foil, pore forming conditions: accurately control the pore forming time, temperature and other parameters to ensure that the size and distribution of the micropores meet the requirements.

[0019] Preferably, the current density in step S5 is: a larger current density (such as 201-1000 mA / cm 2 ), to achieve uniform expansion of micropores on the surface of aluminum foil in a short time; Temperature: Same as electrochemical corrosion, set an appropriate temperature to promote the pore expansion reaction.

[0020] Preferably, the annealing treatment in step S6 optimizes the microstructure and performance of the electrode foil by precisely controlling the annealing temperature and time (eg, 200-400° C., 1-2 hours).

[0021] Compared with the prior art, the present invention provides a method for manufacturing a capacitor electrode foil for military use, which has the following beneficial effects:

[0022] 1. The manufacturing method of the electrode foil for military capacitors can make the produced electrode foil have excellent electrical properties, thermal stability and mechanical properties, and can meet the strict requirements of military capacitors for high-performance electrode foil. Through strict cleaning and post-processing processes, the purity and stability of the electrode foil are significantly improved, ensuring its high reliability during use. The optimization of the corrosion process enables the electrode foil to have a higher specific surface area and capacitance, thereby improving the energy density of the capacitor. The application of intelligent manufacturing technology improves production efficiency, reduces production costs, and makes the production of electrode foil more economical. The establishment of an online monitoring system makes quality monitoring in the production process more real-time and accurate, reduces the rate of defective products, and improves product quality and customer satisfaction.

[0023] 2. The manufacturing method of the capacitor electrode foil for military use ensures that the electrode foil has excellent conductivity, thermal stability and mechanical properties by selecting high-performance raw materials, laying the foundation for the high performance of the electrode foil. At the same time, the use of advanced cleaning technology can effectively remove impurities and contaminants on the surface of the material, thereby improving the purity and reliability of the electrode foil.

[0024] 3. The manufacturing method of the capacitor electrode foil for military use can significantly increase the specific surface area and capacitance of the electrode foil and improve its energy storage capacity through process optimization of electrochemical corrosion, pore corrosion and pore expansion corrosion. In addition, the innovation of post-processing process further improves the purity and stability of the electrode foil and eliminates possible defects and hidden dangers.

[0025] 4. The manufacturing method of the capacitor electrode foil for military use realizes the automation and intelligence of the production process by introducing intelligent manufacturing technology, thereby improving production efficiency and reducing production costs. An online monitoring system is established to realize real-time monitoring of the production process, thus ensuring the stability and consistency of product quality. DETAILED DESCRIPTION

[0026] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] Embodiment 1

[0028] Embodiment of a method for manufacturing capacitor electrode foil for military use

[0029] A method for manufacturing a capacitor electrode foil for military use comprises the following steps:

[0030] S1: Prepare raw materials: Select high-performance raw materials: Use high-purity, low-impurity aluminum foil as raw materials to ensure the basic performance of electrode foil;

[0031] S2: Pretreatment: Ultrasonic cleaning is used, and nano-level detergents and surfactants are added during cleaning to more thoroughly remove impurities such as oil, oxides, etc. on the surface of the aluminum foil, thereby improving the efficiency and quality of subsequent treatment;

[0032] S3: Electrochemical corrosion: By adjusting the formula of the electrochemical corrosion solution and the corrosion conditions (such as temperature, current density, etc.), the corrosion process is optimized to achieve uniform corrosion on the surface of the aluminum foil and improve the specific surface area and capacitance performance of the electrode foil;

[0033] S4: Optimization of pore etching process: Introduce laser drilling or micro-nano processing technology to achieve precise control of micropores on the surface of aluminum foil and further improve the performance of electrode foil;

[0034] S5: Optimization of hole expansion corrosion process: Adopting the DC hole expansion with large current and short time corrosion method, combined with the use of additives, to achieve uniform expansion of micropores on the surface of aluminum foil, and improve the bending strength and capacitance performance of electrode foil;

[0035] S6: Post-processing process innovation: Introduce annealing treatment in the post-processing process, optimize the microstructure and performance of the electrode foil by controlling the annealing temperature and time, and improve the strength and stability of the electrode foil;

[0036] S7: Introducing intelligent manufacturing technology: By introducing intelligent manufacturing technology, such as robots and automated production lines, the electrode foil manufacturing process can be automated and intelligentized to improve production efficiency and product quality;

[0037] S8: Establish an online monitoring system: Establish an online monitoring system to monitor the key parameters (such as temperature, current density, etc.) in the electrode foil manufacturing process in real time to ensure the stability and controllability of the manufacturing process;

[0038] S9: Quality sampling and performance testing: Regular quality sampling is carried out on the produced electrode foil to ensure that its performance and quality meet the requirements; a series of performance tests (such as capacitance performance, flexural strength, etc.) are carried out on the electrode foil to ensure that it meets the use requirements of military capacitors, and finally the manufacture of the electrode foil is completed.

[0039] Specifically, the raw material in step S1 is high-purity aluminum foil: as the main raw material of the electrode foil, high-purity (such as 99.99% and above) aluminum foil is selected to ensure the basic performance of the electrode foil. The thickness of the aluminum foil in step S1 can be selected according to the specific application requirements. The appropriate aluminum foil thickness is generally in the range of tens of microns to hundreds of microns.

[0040] Specifically, in step S3, according to the needs of electrochemical corrosion and pitting corrosion, a suitable electrolyte formula is selected, which usually includes acid, salt and other additives, and the electrolyte concentration: the ratio of each component in the electrolyte (such as the ratio of acid to salt) needs to be precisely controlled to ensure the stability and controllability of the electrochemical corrosion and pitting corrosion process.

[0041] Specifically, the pretreatment in step S2 also includes surface treatment. If necessary, the surface of the aluminum foil is micro-treated (such as grinding and polishing) to improve its surface properties.

[0042] Specifically, the current density in steps S3 and S4 is controlled within a certain range, such as 120-400 mA / cm 2, ensure uniform corrosion on the surface of the aluminum foil; temperature: set an appropriate temperature, such as 50-80℃, to promote the corrosion reaction; pore corrosion: pore forming agent: select a suitable pore forming agent to form uniform micropores on the surface of the aluminum foil, pore forming conditions: accurately control the pore forming time, temperature and other parameters to ensure that the size and distribution of the micropores meet the requirements.

[0043] Specifically, in step S5, the current density is: a larger current density (such as 201-1000 mA / cm 2 ), to achieve uniform expansion of micropores on the surface of aluminum foil in a short time; Temperature: Same as electrochemical corrosion, set an appropriate temperature to promote the pore expansion reaction.

[0044] Specifically, the annealing treatment in step S6 optimizes the microstructure and performance of the electrode foil by precisely controlling the annealing temperature and time (eg, 200-400° C., 1-2 hours).

[0045] Through the above technical scheme, in the present invention, the electrode foil produced can have excellent electrical properties, thermal stability and mechanical properties, and can meet the strict requirements of military capacitors for high-performance electrode foil. Through strict cleaning and post-processing processes, the purity and stability of the electrode foil are significantly improved, ensuring its high reliability during use. The optimization of the corrosion process enables the electrode foil to have a higher specific surface area and capacitance, thereby improving the energy density of the capacitor. The application of intelligent manufacturing technology improves production efficiency, reduces production costs, and makes the production of electrode foil more economical. The establishment of an online monitoring system makes quality monitoring in the production process more real-time and accurate, reduces the defective rate, and improves product quality and customer satisfaction.

[0046] Embodiment 2

[0047] S1: Prepare raw materials: Select high-performance raw materials: Use high-purity, low-impurity aluminum foil as raw materials to ensure the basic performance of electrode foil;

[0048] S2: Pretreatment: Ultrasonic cleaning is used, and nano-level detergents and surfactants are added during cleaning to more thoroughly remove impurities such as oil, oxides, etc. on the surface of the aluminum foil, thereby improving the efficiency and quality of subsequent treatment;

[0049] S3: Electrochemical corrosion: By adjusting the formula of the electrochemical corrosion solution and the corrosion conditions (such as temperature, current density, etc.), the corrosion process is optimized to achieve uniform corrosion on the surface of the aluminum foil and improve the specific surface area and capacitance performance of the electrode foil;

[0050] S4: Optimization of pore etching process: Introduce laser drilling or micro-nano processing technology to achieve precise control of micropores on the surface of aluminum foil and further improve the performance of electrode foil;

[0051] S5: Optimization of hole expansion corrosion process: Adopting the DC hole expansion with large current and short time corrosion method, combined with the use of additives, to achieve uniform expansion of micropores on the surface of aluminum foil, and improve the bending strength and capacitance performance of electrode foil;

[0052] S6: Post-processing process innovation: Introduce annealing treatment in the post-processing process, optimize the microstructure and performance of the electrode foil by controlling the annealing temperature and time, and improve the strength and stability of the electrode foil;

[0053] S7: Introducing intelligent manufacturing technology: By introducing intelligent manufacturing technology, such as robots and automated production lines, the electrode foil manufacturing process can be automated and intelligentized to improve production efficiency and product quality;

[0054] S8: Establish an online monitoring system: Establish an online monitoring system to monitor the key parameters (such as temperature, current density, etc.) in the electrode foil manufacturing process in real time to ensure the stability and controllability of the manufacturing process;

[0055] S9: Quality sampling and performance testing: Regular quality sampling is carried out on the produced electrode foil to ensure that its performance and quality meet the requirements; a series of performance tests (such as capacitance performance, flexural strength, etc.) are carried out on the electrode foil to ensure that it meets the use requirements of military capacitors, and finally the manufacture of the electrode foil is completed.

[0056] Specifically, the raw material in step S1 is high-purity aluminum foil: as the main raw material of the electrode foil, high-purity (such as 99.99% and above) aluminum foil is selected to ensure the basic performance of the electrode foil. The thickness of the aluminum foil in step S1 can be selected according to the specific application requirements. The appropriate aluminum foil thickness is generally in the range of tens of microns to hundreds of microns.

[0057] Specifically, in step S3, according to the needs of electrochemical corrosion and pitting corrosion, a suitable electrolyte formula is selected, which usually includes acid, salt and other additives, and the electrolyte concentration: the ratio of each component in the electrolyte (such as the ratio of acid to salt) needs to be precisely controlled to ensure the stability and controllability of the electrochemical corrosion and pitting corrosion process.

[0058] Specifically, the pretreatment in step S2 also includes surface treatment. If necessary, the surface of the aluminum foil is micro-treated (such as grinding and polishing) to improve its surface properties.

[0059] Specifically, the current density in steps S3 and S4 is controlled within a certain range, such as 120-400 mA / cm 2 , ensure uniform corrosion on the surface of the aluminum foil; temperature: set an appropriate temperature, such as 55-75℃, to promote the corrosion reaction; pore corrosion: pore forming agent: select a suitable pore forming agent to form uniform micropores on the surface of the aluminum foil, pore forming conditions: accurately control the pore forming time, temperature and other parameters to ensure that the size and distribution of the micropores meet the requirements.

[0060] Specifically, in step S5, the current density is: a larger current density (such as 195-900 mA / cm 2 ), to achieve uniform expansion of micropores on the surface of aluminum foil in a short time; Temperature: Same as electrochemical corrosion, set an appropriate temperature to promote the pore expansion reaction.

[0061] Specifically, the annealing treatment in step S6 optimizes the microstructure and performance of the electrode foil by precisely controlling the annealing temperature and time (eg, 220-390° C., 1-2 hours).

[0062] Embodiment 3

[0063] S1: Prepare raw materials: Select high-performance raw materials: Use high-purity, low-impurity aluminum foil as raw materials to ensure the basic performance of electrode foil;

[0064] S2: Pretreatment: Ultrasonic cleaning is used, and nano-level detergents and surfactants are added during cleaning to more thoroughly remove impurities such as oil, oxides, etc. on the surface of the aluminum foil, thereby improving the efficiency and quality of subsequent treatment;

[0065] S3: Electrochemical corrosion: By adjusting the formula of the electrochemical corrosion solution and the corrosion conditions (such as temperature, current density, etc.), the corrosion process is optimized to achieve uniform corrosion on the surface of the aluminum foil and improve the specific surface area and capacitance performance of the electrode foil;

[0066] S4: Optimization of pore etching process: Introduce laser drilling or micro-nano processing technology to achieve precise control of micropores on the surface of aluminum foil and further improve the performance of electrode foil;

[0067] S5: Optimization of hole expansion corrosion process: Adopting the DC hole expansion with large current and short time corrosion method, combined with the use of additives, to achieve uniform expansion of micropores on the surface of aluminum foil, and improve the bending strength and capacitance performance of electrode foil;

[0068] S6: Post-processing process innovation: Introduce annealing treatment in the post-processing process, optimize the microstructure and performance of the electrode foil by controlling the annealing temperature and time, and improve the strength and stability of the electrode foil;

[0069] S7: Introducing intelligent manufacturing technology: By introducing intelligent manufacturing technology, such as robots and automated production lines, the electrode foil manufacturing process can be automated and intelligentized to improve production efficiency and product quality;

[0070] S8: Establish an online monitoring system: Establish an online monitoring system to monitor the key parameters (such as temperature, current density, etc.) in the electrode foil manufacturing process in real time to ensure the stability and controllability of the manufacturing process;

[0071] S9: Quality sampling and performance testing: Regular quality sampling is carried out on the produced electrode foil to ensure that its performance and quality meet the requirements; a series of performance tests (such as capacitance performance, flexural strength, etc.) are carried out on the electrode foil to ensure that it meets the use requirements of military capacitors, and finally the manufacture of the electrode foil is completed.

[0072] Specifically, the raw material in step S1 is high-purity aluminum foil: as the main raw material of the electrode foil, high-purity (such as 99.99% and above) aluminum foil is selected to ensure the basic performance of the electrode foil. The thickness of the aluminum foil in step S1 can be selected according to the specific application requirements. The appropriate aluminum foil thickness is generally in the range of tens of microns to hundreds of microns.

[0073] Specifically, in step S3, according to the needs of electrochemical corrosion and pitting corrosion, a suitable electrolyte formula is selected, which usually includes acid, salt and other additives, and the electrolyte concentration: the ratio of each component in the electrolyte (such as the ratio of acid to salt) needs to be precisely controlled to ensure the stability and controllability of the electrochemical corrosion and pitting corrosion process.

[0074] Specifically, the pretreatment in step S2 also includes surface treatment. If necessary, the surface of the aluminum foil is micro-treated (such as grinding and polishing) to improve its surface properties.

[0075] Specifically, the current density in steps S3 and S4 is controlled within a certain range, such as 140-440 mA / cm 2 , ensure uniform corrosion on the surface of the aluminum foil; temperature: set an appropriate temperature, such as 40-60℃, to promote the corrosion reaction; pore corrosion: pore forming agent: select a suitable pore forming agent to form uniform micropores on the surface of the aluminum foil, pore forming conditions: accurately control the pore forming time, temperature and other parameters to ensure that the size and distribution of the micropores meet the requirements.

[0076] Specifically, in step S5, the current density is: a larger current density (such as 210-1000 mA / cm 2 ), to achieve uniform expansion of micropores on the surface of aluminum foil in a short time; Temperature: Same as electrochemical corrosion, set an appropriate temperature to promote the pore expansion reaction.

[0077] Specifically, the annealing treatment in step S6 optimizes the microstructure and performance of the electrode foil by precisely controlling the annealing temperature and time (eg, 220-420° C., 1-2 hours).

[0078] Quality inspection and performance test report:

[0079] 1. Sample Information

[0080] A total of 30 batches of military capacitor electrode foil samples were sampled this time, each batch containing 600 pieces of electrode foil.

[0081] 2. Appearance quality inspection

[0082] The appearance of each electrode foil was comprehensively inspected by visual inspection and observation with a magnifying glass. The results showed that the surface of the electrode foil was flat, without obvious scratches, pits and contaminants, and the color was uniform without obvious color difference. No burrs or sharp edges were found on the edges. Overall, the appearance quality was good and met the standard requirements.

[0083] 3. Dimensional accuracy measurement

[0084] The dimensions of the electrode foil were measured using high-precision measuring instruments. The results showed that the length, width and thickness of the electrode foil all met the design requirements, with an error range of ±0.01mm. At the same time, the hole diameter and hole spacing of the electrode foil also met the standard requirements, reflecting a high degree of dimensional accuracy.

[0085] 4. Material composition analysis

[0086] The material composition of the electrode foil was tested by spectral analysis. The results showed that the main component of the electrode foil was aluminum, with a purity of more than 99.99%. In addition, it also contained a small amount of other metal elements and oxides, but the content was within an acceptable range and had no significant effect on the performance of the electrode foil.

[0087] V. Performance Test Data

[0088] Capacitance performance test: Under standard test conditions, the capacitance performance of the electrode foil was tested. The results showed that the capacitance value of the electrode foil was stable, with a fluctuation range of ±5%, which met the design requirements.

[0089] Bending strength test: The electrode foil was subjected to bending tests at different angles. The results showed that it has high bending strength and can withstand large mechanical stress without breaking.

[0090] High temperature resistance test: The electrode foil was placed in a high temperature environment for a long time test. The results showed that its performance was stable without obvious performance degradation or deformation.

[0091] 6. Data Analysis Report

[0092] Based on the above test data, the performance of the electrode foil was comprehensively analyzed. First, in terms of appearance quality, dimensional accuracy and material composition, the electrode foil meets the standard requirements, reflecting a high level of manufacturing. Secondly, in terms of performance testing, the electrode foil has stable capacitance performance, high flexural strength and good high temperature resistance, indicating that it has excellent performance indicators. In summary, the overall quality of the electrode foil sampled this time is good, and the performance is stable and reliable.

[0093] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A method for manufacturing capacitor electrode foil for military use, characterized in that: The following steps are involved: S1: Prepare raw materials: Select high-performance raw materials: Use high-purity, low-impurity aluminum foil as raw materials to ensure the basic performance of electrode foil; S2: Pretreatment: Ultrasonic cleaning is used, and nano-level detergents and surfactants are added during cleaning to more thoroughly remove impurities such as oil, oxides, etc. on the surface of the aluminum foil, thereby improving the efficiency and quality of subsequent treatment; S3: Electrochemical corrosion: By adjusting the formula of the electrochemical corrosion solution and the corrosion conditions (such as temperature, current density, etc.), the corrosion process is optimized to achieve uniform corrosion on the surface of the aluminum foil and improve the specific surface area and capacitance performance of the electrode foil; S4: Optimization of pore etching process: Introduce laser drilling or micro-nano processing technology to achieve precise control of micropores on the surface of aluminum foil and further improve the performance of electrode foil; S5: Optimization of hole expansion corrosion process: Adopting the DC hole expansion with large current and short time corrosion method, combined with the use of additives, to achieve uniform expansion of micropores on the surface of aluminum foil, and improve the bending strength and capacitance performance of electrode foil; S6: Post-processing process innovation: Introduce annealing treatment in the post-processing process, optimize the microstructure and performance of the electrode foil by controlling the annealing temperature and time, and improve the strength and stability of the electrode foil; S7: Introducing intelligent manufacturing technology: By introducing intelligent manufacturing technology, such as robots and automated production lines, the electrode foil manufacturing process can be automated and intelligentized to improve production efficiency and product quality; S8: Establish an online monitoring system: Establish an online monitoring system to monitor the key parameters (such as temperature, current density, etc.) in the electrode foil manufacturing process in real time to ensure the stability and controllability of the manufacturing process; S9: Quality sampling and performance testing: Regular quality sampling is carried out on the produced electrode foil to ensure that its performance and quality meet the requirements; a series of performance tests (such as capacitance performance, flexural strength, etc.) are carried out on the electrode foil to ensure that it meets the use requirements of military capacitors, and finally the manufacture of the electrode foil is completed.

2. The method for manufacturing a capacitor electrode foil for military use according to claim 1, characterized in that: The raw material in step S1 is high-purity aluminum foil: as the main raw material of the electrode foil, high-purity (such as 99.99% and above) aluminum foil is selected to ensure the basic performance of the electrode foil. The thickness of the aluminum foil in step S1 can be selected according to specific application requirements, and the general range is between tens of microns and hundreds of microns.

3. The method for manufacturing a capacitor electrode foil for military use according to claim 1, characterized in that: In step S3, according to the needs of electrochemical corrosion and pitting corrosion, a suitable electrolyte formula is selected, which usually includes acid, salt and other additives. The electrolyte concentration: the ratio of each component in the electrolyte (such as the ratio of acid to salt) needs to be precisely controlled to ensure the stability and controllability of the electrochemical corrosion and pitting corrosion process.

4. The method for manufacturing a capacitor electrode foil for military use according to claim 1, characterized in that: The pretreatment in step S2 also includes surface treatment. If necessary, the surface of the aluminum foil is micro-treated (such as grinding and polishing) to improve its surface properties.

5. The method for manufacturing a capacitor electrode foil for military use according to claim 1, characterized in that: The current density in steps S3 and S4 is controlled within a certain range, such as 120-400 mA / cm 2 , ensuring uniform corrosion on the surface of the aluminum foil; Temperature: Set an appropriate temperature, such as 50-80°C, to promote the corrosion reaction; Poring corrosion: Poring agent: Select a suitable pore-forming agent to form uniform micropores on the surface of the aluminum foil; Poring conditions: Precisely control parameters such as pore-forming time and temperature to ensure that the size and distribution of the micropores meet the requirements.

6. The method for manufacturing a capacitor electrode foil for military use according to claim 1, characterized in that: The current density in step S5 is: a larger current density (e.g., 201-1000 mA / cm 2 ), to achieve uniform expansion of micropores on the surface of aluminum foil in a short time; Temperature: Same as electrochemical corrosion, set the appropriate temperature to promote the pore expansion reaction.

7. The method for manufacturing a capacitor electrode foil for military use according to claim 1, characterized in that: The annealing treatment in step S6 optimizes the microstructure and performance of the electrode foil by precisely controlling the annealing temperature and time (eg, 200-400° C., 1-2 hours).