1014 results about "Aluminum electrolysis" patented technology

The invention discloses an aluminum electrolytic capacitor appearance defect detection device, relates to the field of aluminum electrolytic capacitor detection, and solves the problem that an existing detection device is difficult to comprehensively detect an aluminum electrolytic capacitor. The aluminum electrolytic capacitor appearance defect detection device comprises a device base and two first supporting plates, and two first transmission belts are arranged between the two first supporting plates; a push roller is arranged on the outer side of the first transmission belt, supporting frames are installed on the corresponding sides of the two first supporting plates, a first detection box is fixedly installed at the top of the device base, and a plurality of first laser probes are arranged on the inner side of the first detection box; the transfer mechanism is used for detecting pins of the capacitor, and the transfer mechanism is mounted at the top of the device base; through the transfer mechanism, the first laser probe detects the capacitor entering the first detection box, under the conveying of the first transmission belt, the capacitor is turned over, and the pins of the capacitor can face upwards, so that the pins of the capacitor can be detected conveniently, and the effect of comprehensive detection is achieved.

The invention relates to the field of capacitor state evaluation, in particular to an aluminum electrolytic capacitor state evaluation method and device based on multi-dimensional data analysis. The method comprises the following steps: performing multi-band excitation on an aluminum electrolytic capacitor, and performing three-dimensional fault distribution reconstruction and structure degradation trend prediction so as to construct an impedance tomography degradation trend prediction map; collecting audio signals in the charging and discharging process of the capacitor, carrying out acoustic texture analysis, carrying out voiceprint-structure degradation correlation mining according to the impedance tomography degradation trend prediction map, and constructing an acoustic texture damage evolution evaluation model; obtaining a thermal imaging image of the capacitor, carrying out local overheating diffusion mining, and constructing a three-dimensional thermal anomaly detection model; performing electrolyte chemical component change tracking and electrolyte degradation situation analysis on the electrolyte of the capacitor, and constructing an electrolyte degradation situation curve; according to the invention, efficient and accurate capacitor state evaluation is realized. The operation reliability and stability of capacitor equipment are improved, and the service life of the equipment is effectively prolonged.

The invention relates to the technical field of aluminum electrolyte recovery, in particular to a waste aluminum electrolyte resource utilization method. The waste aluminum electrolyte resource utilization method comprises the following steps that waste aluminum electrolyte and a reactant are subjected to a reaction in a closed container, a product obtained after the reaction is completed is washed in water, then first solid-liquid separation is carried out to obtain a solid, aluminum fluoride is obtained after drying, and aluminum fluoride is obtained after second solid-liquid separation is carried out. The reactant is selected from one or two of anhydrous aluminum chloride and polyaluminum chloride, and the reaction temperature is not lower than 200 DEG C. By utilizing the physical characteristic that the melting point of the reactant is higher than the boiling point, the reactant forms a solid phase-liquid phase-gas phase three-phase coexistence system in a closed space at the temperature higher than the melting point and the boiling point, so that the reactant can more efficiently perform molecular collision and mutual diffusion at an interface, thereby accelerating the reaction rate and improving the conversion rate.

The invention discloses a process for improving anodic oxidation consistency of an anode foil for an aluminum electrolytic capacitor, and relates to the technical field of capacitor manufacturing, and the process comprises the steps of multi-stage washing, etching, feeding, multi-stage formation, intermediate treatment, first post-treatment, roasting, second post-treatment, stability treatment, drying, rolling, inspection and packaging. Wherein the multi-stage formation adopts three-stage oxidation of low-temperature and low-current, medium-temperature and medium-current and low-temperature and high-current, so that an oxidation film forms a base layer, a growth layer and a high-density protection layer which are uniformly overlapped layer by layer, and the consistency and compactness of the oxidation film are synergistically improved through dynamic water washing, air drying and temperature field and fluid field regulation and control technologies; the oxide film is repaired through first post-treatment, the pore size of the oxide film is reduced, and the compactness of the oxide film is improved; and high-temperature roasting is combined, and a second post-treatment step is carried out, so that the oxidation film forms an aluminum oxide crystal structure which is stable, high in hardness and compact in structure, and the water resistance and reliability of the finished anode foil are enhanced.

The invention discloses a performance test system for an aluminum electrolytic capacitor, and relates to the technical field of capacitor performance test, an environment simulation module accurately simulates a high-temperature and high-humidity environment, and an electrical performance monitoring module obtains key performance parameters in real time; the dynamic parameter acquisition module detects the electrolyte evaporation rate and the high-frequency impedance response curve change based on a mass loss method, the data analysis module comprehensively evaluates the stability of the operation performance, and the test adjustment module predicts and dynamically adjusts the test condition according to the abnormal degree, thereby achieving the comprehensive and accurate evaluation of the performance of the aluminum electrolytic capacitor. The test accuracy is effectively improved, the service life prediction is optimized, and high-reliability guarantee is provided for an industrial control system.

The present application relates to the technical field of aluminum electrolytic capacitors, and specifically discloses a low-temperature, medium- and high-voltage aluminum electrolytic capacitor. Among them, the electrolyte of the low-temperature, medium- and high-voltage aluminum electrolytic capacitor includes the following raw materials: a main solvent, a low-melting point co-solvent, a main solute, an auxiliary solute, a flash voltage enhancer, a hydrogen remover, and a waterproofing auxiliary agent. Among them, the flash voltage enhancer is modified nano-silica. The present invention uses a vinyl silane coupling agent to modify the surface of nano-silica, and then esterifies polyvinyl alcohol and allyl succinic anhydride to form allyl succinic anhydride-grafted polyvinyl alcohol, and effectively combines it with silanized nano-silica, so that the nano-silica particles can be evenly dispersed in the electrolyte to increase the flash voltage of the electrolyte, and by introducing a low-melting point co-solvent, the melting point of the electrolyte system can be effectively reduced, so that the capacitor can maintain low viscosity and good electrical properties in a low-temperature environment.

The invention relates to the technical field of aluminum electrolytic capacitor surface defect detection, and provides an aluminum electrolytic capacitor surface defect detection method, device and equipment and a storage medium, and the method comprises the steps: collecting a multi-scale aluminum electrolytic capacitor surface image; segmenting the image with the lowest resolution based on the region gradient entropy to obtain a plurality of first blocks; wherein the area of the block with the gradient entropy higher than the set threshold value is smaller than the area of the block with the gradient entropy lower than the set threshold value; determining an area corresponding to each first block in the image with the second low resolution; segmenting the region corresponding to each first block based on a region gradient entropy to obtain a plurality of second blocks; coding the position of each block according to the block space position relation; and generating a feature vector based on the blocks and the position coding information thereof for performing defect detection on the surface of the aluminum electrolytic capacitor. According to the invention, the capability of detecting the surface defects of the aluminum electrolytic capacitor is improved.

The invention discloses an aluminum electrolytic capacitor powder stacking sintered foil and a preparation method thereof, and belongs to the technical field of aluminum electrolytic capacitors. The preparation method of the aluminum electrolytic capacitor powder stacking sintered foil comprises the steps that aluminum powder and a dielectric substance precursor serve as raw materials, a dielectric substance is deposited on the surface of the aluminum powder through a chemical vapor deposition method, and the aluminum powder wrapped by the dielectric substance is obtained; the dielectric constant of the dielectric substance is greater than that of aluminum oxide; the method comprises the following steps: uniformly mixing aluminum powder wrapped by a dielectric substance, a binder and a solvent, coating an aluminum foil substrate with the mixture, drying, degreasing at 350-550 DEG C in an oxygen-containing atmosphere, sintering at 600-670 DEG C in an oxygen-free state, and energizing after sintering to obtain the aluminum electrolytic capacitor powder stacked sintered foil. According to the aluminum electrolytic capacitor powder stacking sintering foil prepared by the method, the aluminum electrolytic capacitor powder stacking sintering anode foil per unit area has excellent electrostatic capacity.

The invention discloses a continuous prebaked anode aluminum electrolysis production method and system, and relates to the technical field of anode aluminum electrolysis production, and the method comprises the following steps: firstly, collecting current density distribution data and electrolyte distribution state in an electrolytic cell through a real-time monitoring system, and reflecting current and electrolyte conditions of each area in the electrolytic cell in real time; and data support is provided for subsequent adjustment measures. The electrolyte distribution in the electrolytic cell is monitored in real time and intelligently evaluated, intelligent evaluation is performed in combination with the deep learning model, current distribution is automatically adjusted, and it is ensured that the current density is uniform. According to the scheme, the problems of local overload, excessive consumption of the anode and overheating of equipment are effectively avoided, the energy efficiency and the stability of the electrolysis process are improved, the service life of the equipment is prolonged, the maintenance cost is reduced, the downtime is shortened, and therefore the production efficiency and the economic benefits are improved. And meanwhile, human intervention is reduced, the automation level is improved, and the intelligent management capacity of aluminum electrolysis production is enhanced.

The invention provides a preparation method of an aluminum electrolytic capacitor anode foil, and relates to the technical field of capacitors. The method comprises the following steps: preparing aluminum paste; providing an aluminum foil substrate, coating the surface of the aluminum foil substrate with aluminum paste, and performing drying treatment to form an aluminum foil blank; washing the aluminum foil green body with water, and drying to obtain a porous aluminum foil green body; performing heat treatment on the porous aluminum foil blank; coating the surface of the porous aluminum foil green body subjected to heat treatment with a thin film solution, and performing drying treatment to form a protective film layer on the surface of the porous aluminum foil green body; rolling the porous aluminum foil blank with the protective film layer by using a rolling mill in a skew rolling manner to obtain an initial anode foil; and sintering the initial anode foil, and removing the protective film layer to form a sintered foil. According to the preparation method, the anti-bending performance of the anode foil can be improved.

The invention relates to the technical field of capacitor testing, and provides an aluminum electrolytic capacitor testing and sorting machine which comprises a sorting rotary table, a rack and a plurality of U-shaped grooves, one U-shaped groove is used for feeding, the other U-shaped grooves are used for testing, a through groove is formed in the inner side face of each U-shaped groove, a placing plate penetrates through the through grooves, and the placing plates are arranged in the through grooves. A camera is arranged above the U-shaped groove used for feeding, mounting plates are arranged above the U-shaped groove used for testing, the mounting plates are used for mounting capacitor testing devices, each mounting plate is connected with a pair of electrode plates, the surface of the placing plate is rotatably connected with a movable circular plate, a second motor is arranged on the rack, and the movable circular plate is rotatably connected with the movable circular plate. An output shaft of the second motor is fixedly connected with an electromagnet, and a material collecting box is arranged below the U-shaped groove for testing; and the camera is used for collecting an image of the capacitor and identifying the positive electrode and the negative electrode of the capacitor, so that the positive electrode and the negative electrode on the capacitor correspond to the positions of the electrode plates, accurate alignment of the pins and the electrode plates is realized, and high efficiency and convenience are realized.

The invention belongs to the technical field of electrode foil formation treatment, and particularly relates to an electrode foil and a preparation method thereof and an aluminum electrolytic capacitor, the preparation method of the electrode foil comprises the steps of performing multi-stage formation treatment on a corrosion foil, the number of stages of the formation treatment is at least two, and the formation treatment at least comprises first-stage formation and second-stage formation, first heat treatment is carried out after the second-stage formation; a formation liquid used in the second-stage formation is a mixed solution containing adipate and monopotassium phosphate. According to the preparation method provided by the invention, the formation liquid used in secondary formation is the mixed solution containing adipate and monopotassium phosphate, the limitation of traditional single formation liquid is broken through, and synchronous optimization of the structure, hydration resistance and electrochemical performance of the aluminum oxide film is realized through multi-stage formation, mixed solution synergy and the synergistic effect of formation and heat treatment; meanwhile, production cost is reduced, and environmental load is relieved.

The invention is suitable for the technical field of electrical measurement and state monitoring, and provides an aluminum electrolysis cell power distribution system regionalization independent blanking control method based on pseudo resistance monitoring, and the method comprises the steps: collecting the anode current and the cell voltage of each measurement point; dividing the plurality of measurement points into a plurality of control areas, and calculating a pseudo resistance value of each control area; screening control areas meeting conditions from all the control areas to form a reference area set; determining an aluminum oxide concentration reference state of each control region in the reference region set through a preset concentration state mapping relation; with the reference region set as a starting point, according to the proximity relation between the control region with the undetermined state and the reference region set in space and the similarity of pseudo resistance values, the aluminum oxide concentration state is propagated to all the control regions through iterative matching; according to the aluminum oxide concentration states of all the control areas, independent discharging control instructions of all the control areas are generated; and the regionalized independent control on the concentration of aluminum oxide in the aluminum electrolysis cell is realized.

The invention discloses an aluminum electrolysis process super-multi-target operation decision optimization method, which relates to the technical field of aluminum electrolysis, and comprises the following steps: S1, collecting and processing historical data of an aluminum electrolysis cell, and establishing an expert knowledge base; s2, establishing a data joint knowledge driven aluminum electrolysis cell stability evaluation model based on a neural network; s3, an aluminum electrolysis cell operation decision optimization algorithm based on reinforcement learning aided super-multi-objective evolutionary optimization; s4, performing dimension reduction processing on the obtained decision based on the preference of a decision maker and market fluctuation; s5, filtering and screening the decision after dimension reduction based on the expert knowledge base, and giving a decision with the highest feasibility; according to the method, the aluminum electrolysis cell stability evaluation model is established by using mass production data and process knowledge, the stability of the aluminum electrolysis cell can be evaluated according to the cell condition, and support can be provided for a production manager to judge the cell condition, so that the labor burden is reduced, and the production stability is improved.

The invention provides a preparation method of a sintered anode foil, the sintered anode foil and an aluminum electrolytic capacitor, and the preparation method comprises the following steps: (1) mixing a dispersant and a binder, fully dissolving, adding aluminum powder, and uniformly dispersing to obtain slurry; the binder comprises at least one of aliphatic polycarbonates shown in the following general formula I: # imgabs0 #, m is an integer from 1 to 10, and n is an integer from 100 to 2000; (2) respectively coating two sides of a base material foil with the slurry, and drying to obtain a coated foil; (3) sintering the coated foil to obtain a sintered foil; and (4) forming the sintered foil to obtain the sintered anode foil. According to the preparation method disclosed by the invention, the aliphatic polycarbonate as shown in the general formula I is used as a binder, has a relatively good dispersion effect on micron-sized aluminum powder, and is easier to remove in a sintering stage, so that the sintered anode foil with low carbon residue and leakage current is prepared, and the preparation energy consumption is reduced.

The invention discloses an aluminum electrolysis single anode real-time height calculation simulation model construction method, an anode fault diagnosis method and an aluminum electrolysis process optimization control method. The method comprises the following steps: S1, collecting real-time current data of each anode; s2, collecting the height, the horizontal section area, the volume density, the current efficiency data and the accumulated current flux data of the anode scrap during normal anode replacement of each anode; s3, analyzing an anode correlation influence coefficient; s4, analyzing a post-intervention coefficient; s5, analyzing the comprehensive index coefficient of the electrolytic cell; and S6, obtaining a final calculation model of the real-time height of the single anode. According to the method, the related factors of single anode consumption in the electrolytic cell are decomposed, the main influence factors of the single anode in the electrolytic cell are dynamically split, and the horizontal size error is eliminated in combination with the anode post-intervention treatment, so that the real-time consumption height of the single anode is accurately estimated, and the result digitization is realized; and high-efficiency control of the single anode of the electrolytic cell is realized and anode carbon consumption is reduced.

The invention discloses an aluminum electrolysis cell multi-area collaborative aluminum oxide concentration balancing method based on dynamic nested control, and relates to the technical field of industrial aluminum electrolysis cells, the method comprises the following steps: dividing an aluminum electrolysis cell into a plurality of areas based on the distribution positions of all feeders in the aluminum electrolysis cell; and respectively determining an area resistance parameter upper limit and an area resistance parameter lower limit of each area, and based on the multiple area resistance parameter upper limits and the multiple area resistance parameter lower limits, carrying out feeding control on the aluminum electrolysis cell by utilizing a dynamic nested control principle. According to the application, a method of dynamically nesting reverse stroke charging in a partial region in a whole tank insufficient-excessive charging stroke is adopted, so that automatic homogenization of alumina concentration distribution in an electrolysis production process region is realized.

The invention relates to the field of paper for aluminum electrolytic capacitors, and discloses a preparation method of a high-liquid-absorption high-voltage electrolytic capacitor diaphragm. The whole diaphragm is prepared from high-beating-degree and high-purity insulating softwood pulp, so that high unit thickness voltage resistance can be ensured. The adopted preparation method is a continuous drying mode, the drying efficiency is higher than that of a gap drying mode, after the fibers are formed through a fourdrinier wire, heating drying is firstly adopted, and then freezing decompression drying is adopted, so that fine pore structures among the fibers can be effectively increased, the high voltage resistance of the diaphragm is reserved, and the liquid absorption performance of the diaphragm is also greatly improved; therefore, ion moving resistance is reduced and diaphragm internal resistance is reduced.

The invention relates to the technical field of electrolytic capacitors, in particular to a high-frequency rapid charge and discharge aluminum electrolytic capacitor for a servo motor and a manufacturing method, the high-frequency rapid charge and discharge aluminum electrolytic capacitor comprises an anode foil, a cathode foil, a capacitor shell and electrolyte, porous electrolytic paper is arranged between the anode foil and the cathode foil, and oxide film layers are arranged on two sides of the anode foil. A stable and compact oxidation film is generated on the surface of the anode foil through the phosphoric acid formation liquid, so that the anode foil can withstand high-current impact, and the charging and discharging speed is greatly improved. According to the high-frequency rapid charging and discharging aluminum electrolytic capacitor for the servo motor and the manufacturing method, the high-frequency rapid charging and discharging aluminum electrolytic capacitor for the servo motor has excellent rapid charging and discharging performance, high voltage resistance, good temperature stability, long service life, high reliability and good heat dissipation performance.

The invention belongs to the technical field of aluminum electrolysis, and particularly relates to an electrolytic aluminum oxide concentrated phase conveying solid-gas ratio monitoring system and method, and the system comprises a control system, a material tank system, a compressed air system and a concentrated phase conveying system; the output end of the charging bucket system is connected with the input end of the concentrated phase conveying system; the output end of the compressed air system is connected with the charging bucket system and the concentrated phase conveying system; an air flow meter is mounted on the compressed air system, a weighing sensor is mounted on the charging bucket system, and the control system calculates and controls the solid-gas ratio through the air flow meter and the weighing sensor; the solid-gas ratio is calculated and controlled through the control system, and the working efficiency is improved.

The invention relates to the technical field of electrolytic aluminum production, and provides an aluminum electrolysis cell fault diagnosis method which comprises the steps of collecting and analyzing molten aluminum precipitation rate data of an aluminum electrolysis cell, determining an electrolytic reaction abnormal area, analyzing electrolytic current data in the aluminum electrolysis cell, judging whether a current loss event occurs in the aluminum electrolysis cell or not, and judging whether the current loss event occurs in the aluminum electrolysis cell. Analyzing current transmission data among different cathodes in the aluminum electrolysis cell, and determining electric leakage fault information of the aluminum electrolysis cell, so as to adjust working states of the cathodes in the aluminum electrolysis cell, analyze dynamic data of molten aluminum in the aluminum electrolysis cell, determine an abnormal fluctuation area of the molten aluminum, and collect current data of the cathodes in the aluminum electrolysis cell; current parameters in the aluminum electrolysis cell are detected in different regions, and a parameter basis is provided for judging whether a cathode damage fault occurs in the aluminum electrolysis cell or not; based on the cathode damage fault information, the electrolytic reaction state change information in the aluminum electrolysis cell is predicted, so that whether the aluminum electrolysis cell can continuously perform electrolysis work or not is judged, and the fault diagnosis accuracy and reliability of the aluminum electrolysis cell are improved.

The utility model discloses an aluminum electrolysis anode scrap waste heat utilization device which comprises a trailer, the trailer is provided with a carriage body, a door body is installed on one side of the carriage body, heat preservation materials are laid on the inner wall and the bottom face of the carriage body to form a heat preservation layer, a heat conduction layer is laid on the heat preservation layer on the bottom face of the carriage body, and a plurality of anode scraps and a plurality of new anodes are placed on the heat conduction layer. And the residual poles and the new poles are arranged in a staggered manner. According to the utility model, the new electrode can be preheated by utilizing the residual heat of the residual electrode, and then the preheated new electrode is put into the electrolytic bath for use, so that the heating time and the energy consumption loss of the new electrode in the electrolytic bath can be greatly reduced.

The utility model discloses a novel aluminum electrolytic capacitor, which comprises an open metal shell, the bottom of which is provided with a hollow radiating tube; the top end of the hollow heat dissipation pipe is sealed with a core package, the hollow heat dissipation pipe is provided with a winding structure, and a reel hole is formed in the middle of the winding structure; the core package is arranged in the metal shell, and the hollow radiating tube is inserted into the reel hole; and the sealing element is arranged on the core bag and is connected in the opening side of the metal shell in an embedded manner. According to the novel aluminum electrolytic capacitor provided by the utility model, the hollow radiating tube with the closed top end is additionally arranged at the bottom of the metal shell, so that the reel hole in the core package can be directly inserted into the hollow radiating tube when the core package is assembled, and the hollow radiating tube not only realizes quick assembly of the core package and centered positioning of the core package, but also realizes quick assembly of the core package. And the core package is effectively fixed without shaking, so that the assembling stability is ensured, and meanwhile, high heat generated in the capacitor in a working state can be timely and effectively conducted out due to the hollow arrangement of the heat dissipation pipe.

The invention discloses an aluminum electrolysis production alumina concentration on-line monitoring system, which comprises a sensor unit, a data acquisition module, a data analysis module, a control and display interface and a communication module, the data acquisition module is connected with the data analysis module through a local area network, the data analysis module is connected with the control and display interface through the local area network, and the communication module is connected with the data analysis module through the output end of the communication interface. The invention provides the system and the method capable of accurately monitoring the concentration of aluminum oxide in the aluminum electrolysis process in real time, so that the production efficiency and the product quality are improved, the production cost is reduced, and the system and the method have important practical value and popularization and application prospects.

The invention discloses a method for improving the performance of an anode guide rod and related equipment, relates to the technical field of aluminum electrolysis, and mainly aims at solving the problem that the conductivity of the anode guide rod of an existing electrolytic bath is relatively low. The method comprises the steps that the anode guide rod is scanned to construct a three-dimensional model, the three-dimensional model is used for representing protruding points on the surface of the anode guide rod, and the proportion of the protruding points on the surface of the anode guide rod is determined based on the three-dimensional model; and determining a processing strategy of the anode guide rod based on a comparison relationship between the proportion of the protruding points on the surface of the anode guide rod and a preset proportion threshold value. The method is used for the performance improvement process of the anode guide rod.

The invention provides an aluminum electrolysis cell multi-source data fusion acquisition system, and relates to the technical field of electrolytic aluminum. The system comprises a 5G edge computing node and a central control system which are in communication connection, the 5G edge computing node is further electrically connected with field execution equipment, and the 5G edge computing node is deployed in an electrolytic cell field and has a 5G communication module, an embedded computing unit and a multi-interface access capability. The 5G edge computing node comprises a multi-source data acquisition module, a data fusion and preprocessing module and a data uploading and feedback module, the multi-source data acquisition module is electrically connected with a plurality of sensors and cameras on an electrolytic cell, real-time acquisition of multi-dimensional data is realized, timestamps are stamped on various sensor data through a unified time reference, and the data are uploaded to the electrolytic cell through the data uploading and feedback module. And the heterogeneous data is fused based on the timestamp, so that the data acquisition time difference is eliminated, and the data consistency is improved. According to the invention, high frequency, multi-source fusion and low delay can be realized so as to adapt to higher requirements of the industrial Internet of Things on real-time performance and intelligence.

The invention relates to the technical field of electrolytic aluminum monitoring and control, and provides an automatic control method and system for an aluminum electrolysis cell in the electrolytic aluminum process, and the method comprises the steps: A, collecting the operation parameters of the electrolysis cell in real time through a multi-source sensing array; b, constructing a dynamic material balance-heat balance coupling model, and inputting the operating parameters of the electrolytic cell into the dynamic material balance-heat balance coupling model for outputting alumina blanking rate data; c, according to the aluminum oxide blanking rate data change rate, temperature-polar distance cooperative control of the electrolytic cell is synchronously executed, and the optimal polar distance compensation amount is calculated according to the operation parameters; and D, constructing an electrolytic cell resistance change rate prediction model based on the LSTM neural network, and inputting the aluminum oxide blanking rate data change rate into the LSTM neural network structure model for outputting an aluminum oxide concentration compensation strategy. The change condition of the aluminum electrolysis cell in the aluminum electrolysis process can be rapidly and accurately monitored, and real-time control is provided.

The invention discloses a method for manufacturing anode foil of ultra-high voltage aluminum electrolytic capacitor with high dielectric constant, and belongs to the technical field of anode foil of aluminum electrolytic capacitor. The method comprises: (1) preparation of ultra-high voltage etching foil, including pretreatment of aluminum plain foil, pore formation, secondary pore expansion and tertiary pore expansion of etching foil, etc.; (2) preparation of Ag / TiO2 precursor solution, preparing titanium dioxide gel doped with different Ag contents by sol-gel method; (3) immersion coating treatment, preparing a uniform gel layer on the etching foil by immersion-pulling method; (4) preparation of ultra-high voltage anode foil, anodizing the etching foil after coating the gel layer at high voltage, and then annealing at high temperature. The ultra-high voltage anode foil prepared according to the present invention has a higher specific capacitance, and can also maintain a smaller loss factor tanδ.

The invention particularly relates to an automatic covering agent adding method and system for an electrolytic aluminum workshop crown block. The automatic covering agent adding method comprises the steps that an electrolytic aluminum tank is scanned, segmentation is conducted through a plane segmentation model, so that the surface of electrolytic aluminum liquid and the surface of a first covering agent are obtained, and the surface height of the surface of the electrolytic aluminum liquid is calculated; dividing the whole electrolytic aluminum tank into a plurality of covering areas based on the electrolytic aluminum liquid surface and the first covering agent surface, and obtaining the covering agent demand quantity of each covering area according to the received covering agent thickness threshold value, the surface height and the first covering agent surface; generating a feeding path in the coverage area, and controlling a crown block to drive a rigid material distribution pipe to automatically add a covering agent according to the feeding path and the covering agent demand quantity; and after the covering agent adding procedure in the feeding path is completed, the electrolytic aluminum tank is scanned again to obtain a second covering agent surface.

The invention belongs to the technical field of electrode material preparation, and particularly relates to a preparation method of boric acid-assisted low-temperature sintered porous aluminum foil. The preparation method comprises the following steps: dispersing aluminum powder, boric acid and binder raw materials in a solvent to form dispersed slurry; and coating a matrix with the dispersed slurry, drying, sintering at 450-600 DEG C under protective gas, reacting boric acid with aluminum oxide on the surface of the aluminum powder to form low-melting-point aluminoborate, reducing the sintering temperature, promoting aluminum atom diffusion, increasing sintering neck formation, and sintering to obtain the porous aluminum foil. Boron oxide generated by decomposition of boric acid is added to react with aluminum oxide to form low-melting-point aluminoborate, the sintering liquidus temperature is reduced, aluminum atom diffusion is promoted, and low-temperature sintering at 450-600 DEG C is achieved. The aluminum powder sintered foil is suitable for energy storage devices such as an aluminum electrolytic capacitor and a lithium ion battery, has the advantages of low-temperature energy conservation, high porosity and strong mechanical property, and solves the problems of aluminum oxide obstruction and high high-temperature energy consumption of the traditional aluminum powder sintered foil.