1161results about "Capacitor manufacture" patented technology

The vacuum heat treatment clamp applies a certain pressure to the capacitor core, the core is in an inert gas and negative pressure environment for staged heating, finally, a heat conduction box body is slowly deflated, and after the air pressure in the heat conduction box body is balanced with the atmospheric pressure, the heat conduction box body is opened, so that the capacitor core is subjected to vacuum heat treatment. And taking out the capacitor core. According to the process, the capacitor core is located in the negative pressure inert gas environment, the product is isolated from air and is not oxidized, gas in the product can be easily exhausted through the negative pressure environment, and an internal air gap is eliminated; the capacitor core is located in the middle of the heat treatment clamp, different portions of the capacitor core are evenly heated, product shrinkage is even and consistent, and the voltage resistance and the charging and discharging capacity of a capacitor are obviously improved.

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 relates to the technical field of power electronic components, and discloses a high-temperature-resistant electrolytic capacitor which comprises the following components in parts by weight: 80-90 parts of a graphene or carbon nanotube coating used for preparing an electrolytic capacitor shell; the invention further provides a preparation method of the high-temperature-resistant electrolytic capacitor, and the preparation method comprises the following steps: heat conduction optimization design: simulating a temperature field of the electrolytic capacitor through an unsteady-state heat conduction equation, optimizing a heat dissipation path of the electrolytic capacitor, and improving the heat dissipation performance of the electrolytic capacitor; and heat can be uniformly conducted to an external heat dissipation device. By introducing the microencapsulated phase change material, the graphene coating and the accurate temperature sensor array and optimizing heat dissipation design, efficient heat dissipation, temperature balance and long-term stability of the electrolytic capacitor in a high-temperature environment are achieved, the working performance of the electrolytic capacitor is remarkably improved, and the service life of the electrolytic capacitor is remarkably prolonged.

The embodiment of the invention provides a ceramic diaphragm automatic positioning system based on high-precision visual feedback and closed-loop control, and the system comprises a parameter reference setting module which is used for setting a theoretical reference point and a visual detection parameter; the real-time visual detection module is used for collecting an image of the to-be-stacked film and outputting an image coordinate of the mark point; the core operation module is used for converting the image coordinates of the mark points into actual coordinates based on the visual detection parameters, reading a theoretical reference point of the current to-be-stacked diaphragm and calculating a position error vector between the actual coordinates and the theoretical reference point, and the position error vector comprises a translation compensation amount and a rotation compensation amount; and the motion control and closed loop feedback module is used for receiving the position error vector and generating a control instruction to drive the workbench to move. According to the system, through parameterized reference setting, real-time visual detection, intelligent error calculation and real-time motion compensation, the technical limitation is effectively overcome, and the lamination alignment precision and efficiency are remarkably improved.

A casing material for a power storage device, including a laminate that includes, in order, at least a base material layer, a barrier layer, and a heat-fusible resin layer. The heat-fusible resin layer includes a single layer or a plurality of layers. The heat-fusible resin layer includes at least one layer having a hardness of at least 70 MPa from a cross-section in the lamination direction of the laminate, measured using a nanoindentation method using an indentation load of 100 μN.

The invention provides a capacitor core rod plug dismounting device, and belongs to the technical field of capacitor preparation, and the device comprises a strip-shaped frame which is vertical and is provided with two open ends, and the front and rear inner side surfaces are provided with guide grooves; the clamping assembly comprises two movable rods arranged on the two sides of the strip-shaped frame respectively, the axes of the two movable rods are coaxial and are perpendicular to the side face of the strip-shaped frame, and the opposite ends of the two movable rods are elastically arranged in a telescopic mode along the axes and are provided with clamping plates; the two movable rods are synchronously and oppositely arranged along the axis in a moving manner; the pair of bearing rods is horizontally arranged below the strip-shaped frame and perpendicular to the side face of the strip-shaped frame, and the two bearing rods are movably arranged in the width direction of the strip-shaped frame; the dismantling assembly comprises two pairs of top plates which are vertically arranged below the corresponding guide grooves respectively, and the top plates are movably arranged in the width direction of the strip-shaped frame and the axis direction of the movable rod; the two bearing rods respectively penetrate through the two pairs of top plates; and the transmission assembly is arranged between the movable rod and the bearing rod. The dismounting device can achieve the purpose of automatically pulling out the plug, and the production efficiency of the thin film capacitor is improved.

The utility model discloses a welding jig for a pulse molded capacitor. The pulse molded capacitor comprises a plurality of capacitor bodies arranged at intervals, two connecting frames oppositely arranged on the two sides of the plurality of capacitor bodies and a plurality of molded shells wrapping the peripheries of the plurality of capacitor bodies respectively. The welding jig comprises an upper welding plate, a lower welding plate, a lower mounting cavity and an upper mounting cavity, wherein the upper welding plate and the lower welding plate are oppositely arranged up and down; the lower mounting cavity is formed in the lower welding plate and is used for mounting a capacitor body; the two mounting grooves are respectively formed in the top surface of the lower welding plate and are used for mounting the two connecting frames; the two positioning mechanisms are oppositely arranged on two sides of the capacitor body and are respectively used for fixing the two connecting frames; the structure of the welding jig is specifically limited, the positioning mechanism is arranged to position and fix the connecting frame so as to ensure that the multiple capacitor bodies and the connecting frame can be welded and formed at a time, and the welding quality is stable.

[Problem] To provide a method and an apparatus for manufacturing an electrode for an energy storage device whereby a more compact electrode coating apparatus, an improvement in electrode production speed, and a reduction in running costs can be achieved. [Solution] Provided is a method for manufacturing an electrode for an energy storage device, the method comprising: a step A for applying a slurry to a rolled current collector conveyed in one direction at a prescribed speed; a step B for heating the applied slurry to a temperature not below 30°C and not above the boiling point of a dispersant in the slurry; and a step C for irradiating the slurry applied to the current collector with laser light of a wavelength equal to or greater than 435 nm and less than 550 nm, or of a wavelength equal to or greater than 890 nm and less than 1100 nm, from a laser irradiation unit, wherein the slurry contains 0.1% by mass or more of carbon relative to the solid content of the slurry.

The invention discloses a film for preventing a capacitor core from being damaged and a method for aging by adopting the film, which can effectively isolate the core with large leakage current in time, do not need a specially-assigned person to find and remove the capacitor core with large leakage current, and improve the production efficiency by 50%. And the core is prevented from burning to influence the surrounding core as shown in the figure, so that the product percent of pass can be effectively improved by 12%. Compared with the prior art, the efficiency is improved by 50%, the product percent of pass is improved by 12%, and the method is simple, easy to operate and remarkable in effect.

The invention relates to an internal serial metallized film, a preparation method, a filter capacitor and a base film, the base film is made of a blending material of polyethylene glycol terephthalate and polyethylene naphthalate according to a mass ratio of 2: 3, and the thickness of the base film is 8-12 [mu] m; the multi-layer metallization layer is arranged on the base film and comprises a first metal layer, a buffer layer and a second metal layer, the buffer layer is located between the first metal layer and the second metal layer, the patterned structure forms a plurality of conductive units which are connected in series on the multi-layer metallization layer, each conductive unit is in a regular hexagon shape, and the first metal layer is arranged on the first metal layer. The side length of the conductive units is 3-6mm, and an isolation belt with the width of 0.3-0.8 mm is arranged between the adjacent conductive units. According to the invention, a plurality of key performance indexes such as high-frequency filtering performance, voltage endurance capability, oxidation resistance, structural stability, light transmission and the like are optimized and improved.

The invention relates to the related technical field of capacitor production, in particular to a preparation method of a capacitor shell, which comprises the steps of material selection and preparation, mold design and manufacture, shell forming process, quality detection and test, shell surface treatment and protection, shell assembly and welding, and final detection and quality guarantee of the shell. According to the preparation method of the capacitor shell, multiple key links are covered, various materials are selected, aluminum alloy, stainless steel, plastic and the like are matched with different scenes, the purity is strictly controlled and treated to enhance the performance, the mold design is reasonable, the material selection is proper, the machining precision is high, a cooling system optimizes the forming quality, and the forming process is rich; parameters are controlled to guarantee precision, quality is guaranteed through comprehensive detection, performance and attractiveness are improved through surface treatment, multiple modes are adopted for assembly, automation and manual work are combined, structural stability and good sealing are guaranteed, all links synergistically improve the comprehensive performance of the shell, and production quality and efficiency are guaranteed.

The invention discloses a production method of a vehicle gauge grade MLCC release base film. The base film comprises an outer layer, a middle layer and an inner layer. The outer layer is prepared from PET, silane coupling agent modified nano zinc oxide, organic silicon modified acrylate and an antioxidant; the middle layer is prepared from PET (Polyethylene Terephthalate), ethylene propylene diene monomer, nano silicon dioxide, organic montmorillonite and PP-g-MAH (Maleic Anhydride); the inner layer is composed of PET, a high-density polyethylene / butadiene styrene rubber composite modifier, graphene oxide and multi-walled carbon nanotubes. The prepared vehicle gauge grade MLCC release base film has excellent mechanical properties and thermal stability.

The invention relates to a base metal high-voltage multilayer ceramic dielectric capacitor and a preparation method, the base metal high-voltage multilayer ceramic dielectric capacitor is formed by stacking and firing dielectric layers, and each dielectric layer comprises a dielectric layer and an electrode printed on the dielectric layer. The dielectric layer comprises the following raw materials: a BMYT main matrix, an NN material, magnesium oxide, manganous-manganic oxide, zirconium dioxide, calcium carbonate, strontium carbonate and rare earth oxide; through the raw material composition and the preparation method of the ceramic dielectric capacitor, the prepared ceramic dielectric capacitor has excellent performances of high dielectric constant, high voltage resistance, stable dielectric-temperature characteristic curve, low loss, high insulation resistance, long-term high-voltage reliability and the like under the condition of high dielectric thickness (30 microns before firing).

The utility model provides a film capacitor glue pouring shaping and pin positioning work fixture, which is characterized by comprising a base, a filler strip and a tooth-shaped positioning clamping plate, the tooth-shaped positioning clamping plate, the filler strip and the base are sequentially arranged from top to bottom, the base is provided with a plurality of cavities, the sizes of the cavities are matched with the sizes of product shells, and the tooth-shaped positioning clamping plate and the filler strip are matched with each other. The product shell is loaded with a product and then is arranged in the base cavity; the appearance size of the tooth-shaped positioning clamping plate is consistent with that of the base, the middle of the tooth-shaped positioning clamping plate is an empty slot, a plurality of convex teeth are vertically symmetrical in the empty slot and are provided with cavities matched with sheet pins to insert, and the neutral lines of the convex teeth are consistent with the neutral line of the cavity of the base; the base cavity is through up and down, so that the product is easy to demould after the glue pouring material is cured; the hollowed-out parts of the tooth-shaped positioning clamping plate are more, so that the glue filling operation is easy to complete; a cavity of a base of the product shell is matched, so that deformation of the shell in the high-temperature drying process is prevented; the tooth-shaped positioning clamping plate fixes the sheet pins, so that the pin positioning problem of the capacitor is solved, and deviation of the pins in the transfer process after glue pouring is prevented.

To highly accurately calculate a lamination deviation amount between two layers of a laminated sheet body.SOLUTION: The sheet body 2 has a first sheet body 3 and a second sheet body 4 which are alternately laminated. The first sheet body includes a first mark 3334 and first through-holes 30c, 30d. The second sheet body includes a second mark 4344 and second through-holes 440c, 40d. The first marker is formed such that the first direction D1 can be specified. The second mark is formed so that the second direction D2 can be specified. When the first sheet element is accurately stacked on the second sheet element, the second mark is located at a predetermined second ideal position with respect to the first mark. When the second sheet element is accurately stacked on the first sheet element, the first mark is located at a predetermined first ideal position with respect to the second mark. In the upward view, the positional relationship between the position of the first marker and the second ideal position with respect to the first direction coincides with the positional relationship between the position of the second marker and the first ideal position with respect to the second direction.SELECTED DRAWING: Figure 6

The invention relates to the technical field of capacitor manufacturing, and discloses a block lamination method of a multilayer ceramic capacitor, which comprises the following steps of: feeding protective films, cutting the protective films in a protective film conveying process, stacking a plurality of protective films on a protective film stripping table, and simultaneously adsorbing the plurality of protective films to a lamination carrying table; laminating a bottom protective film, feeding a dielectric film roll, and cutting in a dielectric film conveying process; the dielectric diaphragms are laminated, and the in-place identification mode of the dielectric diaphragms is optimized; laminating a top protective film; the invention also discloses a block lamination device of the multilayer ceramic capacitor, the protective film conveying mechanism is provided with a first vertical cutting assembly and a first transverse cutting assembly, and the dielectric film conveying mechanism is provided with a second vertical cutting assembly and a second transverse cutting assembly; according to the invention, the lamination efficiency of the block lamination is improved, so that the dielectric diaphragm only needs to be provided with a mark point and does not need to be provided with a stripping mark point, the width required by the dielectric diaphragm is reduced, and materials are saved and dangerous waste materials are reduced.

The invention discloses a method for improving the voltage endurance capability of a chip tantalum capacitor, and belongs to the technical field of capacitor manufacturing, and the method comprises the steps: enabling an anode tantalum block formed through a powder metallurgy method to generate a dielectric oxide film in an acid solution, then placing the anode tantalum block in sputtering coating equipment, introducing oxygen, taking tantalum as a target material, and carrying out sputtering coating on the anode tantalum block; a layer of tantalum pentoxide film is generated on the surface; and finally, the chip tantalum capacitor is formed by coating a manganese dioxide or polymer cathode. The invention relates to a method for improving the voltage endurance capability of a chip-type tantalum capacitor, which plays a role in improving the reliability of the chip-type tantalum capacitor.

To provide a mixing system 1 for a power storage device that efficiently homogenizes multiple types of powder.SOLUTION: A mixing system 1 for a power storage device includes a measuring portion 10 that stores multiple types of powder P measured at a predetermined ratio, a supply portion 20 that is arranged below the measuring portion 10 and supplies the powder P to a kneading portion 30, and the kneading portion 30 that is connected to the supply portion 20 and kneads the powder P supplied from the supply portion 20. The measuring portion 10 includes a lower opening 10c that opens downward, a shutter 11 that is arranged at an opening edge 10d of the lower opening 10c, and a control portion 13 that opens and closes the lower opening 10c by sliding a shutter 11 in an opening / closing direction A. The opening speed, which is the speed at which the shutter 11 moves in the opening direction B, is set on the basis of the volume ratio of the powder P in each of multiple compartments obtained by dividing the powder P stored in the measuring portion 10 into multiple compartments in the opening / closing direction A.SELECTED DRAWING: Figure 1

The utility model discloses a round core clamping machine which comprises a machine frame, a clamp transferring channel, a clamp placing station, a round core placing station, a buffer rubber filling station, a pressing plate placing station, a nut locking station and a round core moving device. The clamp placing station, the round core placing station, the pressing plate placing station and the nut locking station are sequentially arranged along the clamp transferring channel, the buffer rubber filling station is located above the round core placing station, and the round core moving device is located on one side of the round core placing station. Through the arrangement of the round core moving device, the cores can be moved in the corresponding direction, so that the round cores are stacked in a staggered mode, the cores in the upper row can be conveniently stacked at the adjacent position of the two cores in the lower row, the vertical space during core stacking is saved, the number of the cores stacked each time is increased, and therefore the metal spraying efficiency is improved.

The invention provides a polymer-based dielectric medium suitable for high temperature and a preparation method thereof. The preparation method comprises the following steps: S1, heating and sintering an aluminum source solution to prepare two-dimensional aluminum oxide; s2, mixing the barium titanate precursor solution, aluminum oxide and a binder, and then performing electrostatic spinning, drying, sintering and grinding to prepare one-dimensional barium titanate / aluminum oxide; s3, two-dimensional aluminum oxide and one-dimensional barium titanate / aluminum oxide are added into the organic solvent respectively, polyimide is added after uniform stirring, stirring continues, and two-dimensional aluminum oxide / PI colloid and one-dimensional barium titanate / aluminum oxide / PI colloid are prepared; and S4, sequentially coating ITO conductive glass with the two-dimensional aluminum oxide / PI colloid, the one-dimensional barium titanate / aluminum oxide / PI colloid and the two-dimensional aluminum oxide / PI colloid, and drying and quenching after coating to obtain the polymer-based dielectric. The polymer-based dielectric medium provided by the invention has good high-temperature stability and excellent energy storage density and energy storage efficiency.

The invention relates to a defoaming method for MLCC ceramic slurry, and the method comprises the following steps: determining the number of defoaming stages and the initial operation parameters of each defoaming stage, the initial operation parameters comprising stage duration, vacuum degree and stirring speed; wherein the defoaming stage comprises a first pressure state stage and a second pressure state stage which are alternately executed; the vacuum degree of the first pressure state stage is normal pressure, and the vacuum degree of the second pressure state stage is smaller than or equal to a preset vacuum degree threshold value; and controlling the defoaming device to execute the defoaming operation of each defoaming stage in sequence, wherein the operation of each stage is controlled based on the corresponding initial operation parameter. According to the defoaming method of the MLCC ceramic slurry disclosed by the embodiment of the invention, tiny bubbles are efficiently removed in a vacuum stage, and incomplete defoaming or particle aggregation caused by out-of-control viscosity in single-stage treatment is avoided; through the alternate design, bubbles of different sizes can be released step by step, the viscosity change can be controlled, and finally the bubble removing efficiency and the product quality of the MLCC are improved.

A capacitor encapsulation positioning device comprises a base, a positioning seat and a plurality of supporting seats, the positioning seat and the supporting seats are arranged on the base, and the base is used for supporting a capacitor and the positioning device; the upper end of the positioning seat is provided with a plurality of positioning grooves used for placing the connecting terminals, and positioning columns are arranged in the positioning grooves and used for penetrating through through holes in the connecting terminals to position the connecting terminals in the horizontal direction; a positioning piece is arranged on the supporting base and used for supporting, positioning and installing the steel sleeve in the vertical direction and / or the horizontal direction. According to the invention, the positioning accuracy of the capacitor is ensured through multi-point positioning, the overall assembly accuracy of the shell and the confluence busbar is ensured through multi-point positioning of the confluence busbar, and the positioning precision is improved to adapt to the capacitor in a higher power density grouping mode.

A method for preparing a green-body chip of three-terminal multi-layer ceramic capacitive filter is provided. The method includes: providing a printing plate which includes a pattern of a tabbed electrode and a pattern of a through electrode, the pattern of the tabbed electrode and the pattern of the through electrode, an avoiding portion is provided on a position of both sides of the through electrode corresponding to the tab of the tabbed electrode. A supporting pattern is provided on both ends of the tabbed electrode; placing the printing plate and performing electrode printing on the green sheet after casting; stacking the green sheet after printing according to a certain offset, and laminating after stacking to obtain a block; dicing the block to obtain the green-body chip of three-terminal multi-layer ceramic capacitive filter.

A method for manufacturing a multi-layer ceramic capacitor (MLCC) end electrode and printing a full-area inner electrode protective layer is disclosed. The method uses thin dielectric ceramic layer thickness and a plurality of nickel inner electrode stacks to achieve high capacitance. The method produces high-density electrode-to-ceramic ratio end edges and side edges. The method uses an ultralow-temperature electrochemical deposition coating technology to manufacture a low-stress multi-layer ceramic capacitor end electrode and an insulating protective layer, thereby improving the yield of the multi-layer ceramic capacitor and reducing manufacturing costs.

Systems and methods for press-forming a flexible thin sheet of ceramic paste, such as, e.g., barium titanate, into a wavy shape. The wave may be 1-dimensional, such as, e.g., a sinusoid, or 2-dimensional, such as, e.g., an egg-crate shape. A mold embossed with a reverse, or negative, of an intended form of the wavy shape may be used. The egg-crate shape ceramic layers may be stacked with alternating sheets of a conductive, or electrode, material before being sintered and densified. Alternatively, the ceramic sheets can be layered with the sheets of conductive material, and then pressed into the wavy shape together. Optionally, conductive ink may be applied to the ceramic sheets instead of using sheets of conductive material in both cases.

The invention discloses an edge trimming mechanism for machining an aluminum capacitor shell, and relates to the technical field of aluminum capacitor shell machining. The edge trimming mechanism comprises a base, a stand column is arranged on the base, a top plate is fixed to the top end of the stand column, and an edge trimming assembly is arranged below the top plate. In the trimming assembly, a movable plate is arranged on the inner side of a lifting frame, and a structure capable of adjusting the distance between two grinding columns is arranged on the bottom face of the movable plate so as to adapt to shells of different thicknesses. An electric sliding rail and an electric sliding block on the inner side of the lifting frame drive a moving plate to horizontally move to adapt to shells with different diameters; the motor drives the screw rod to drive the lifting frame to vertically move, so that the grinding column can be clamped into the shell sections with different heights. The second motor is driven through a gear and a chain to form an acceleration gear structure to accelerate rotation of the polishing column. A rotating mechanism is further arranged on the base, the electric rotating table drives the clamped and fixed capacitor to rotate and is matched with the trimming assembly, efficient trimming and polishing of the inner side and the outer side of the tangent plane of the capacitor are achieved, and production benefits are improved.

A multilayer ceramic capacitor, including a capacitor body including a dielectric layer and an internal electrode layer, and an external electrode disposed outside of the capacitor body, wherein the external electrode includes an electrode layer disposed directly on a cross-section of the capacitor body to be electrically connected to at least one of the internal electrode layers, the electrode layer includes a conductive metal, and a glass including cobalt (Co), and cobalt (Co) is included in an amount of 0.13 parts by weight to 0.64 parts by weight based on 100 parts by weight of the conductive metal. A method of manufacturing the multilayer ceramic capacitor.

The utility model discloses a potting tool, assembling equipment and capacitor, relates to capacitor element technical field, the potting tool comprises an elastic base plate and a reinforcing plate, the elastic base plate possesses a first side and a second side which are oppositely arranged in its thickness direction, the first side of the elastic base plate is used for covering the opening end of the housing, and the second side of the elastic base plate is used for covering the opening end of the housing. The housing and the housing form a cavity in an enclosing manner; the hardness of the reinforcing plate is set to be larger than that of the elastic bottom plate, the reinforcing plate is arranged on the second side of the elastic bottom plate or inside the elastic bottom plate, the first side of the elastic bottom plate covers the opening end of the capacitor shell, after the first side of the elastic bottom plate and the shell form a cavity in an enclosing mode, the cavity is filled with high-temperature liquid pouring sealant, and after the pouring sealant is solidified, the first side of the elastic bottom plate and the shell form the cavity in an enclosing mode. The elastic bottom plate can be stripped from the shell of the capacitor, and the potting tool is removed, so that the thickness of the capacitor product can be reduced, and the material cost of the bottom cover is saved at the same time.

The invention belongs to the technical field of capacitor electrode foil manufacturing, and discloses a capacitor formed foil multi-stage oxidation treatment device and a capacitor formed foil multi-stage oxidation treatment process, the device comprises multi-stage formation tanks which are arranged in sequence, cleaning mechanisms are arranged among the multi-stage formation tanks, the device further comprises a transmission mechanism used for transmitting formed foil, and the transmission mechanism comprises transmission rollers. The transmission rollers are arranged in an up-and-down staggered mode, and the formed foil sequentially penetrates through the transmission rollers; the head end of the formed foil is wound around the driving roller, and the driving roller is used for winding and tightening the formed foil; the inclining assembly is used for inclining the transmission roller and the driving roller; according to the scheme, the transmission roller and the driving roller drive formed foil to incline through the inclination assembly, so that water and formed liquid flow from high to low and are prevented from being accumulated on the two sides of the transmission roller; the problem that water accumulates on the two sides of a transmission roller in an existing formed foil cleaning device is solved.

The application provides a preparation process of a formation foil and the formation foil prepared by the preparation process, and the preparation process comprises a formation pretreatment, and the formation pretreatment comprises the following steps: S100: performing at least one first film forming treatment on an etching foil, and the first film forming treatment comprises sequentially performing a first boiling treatment, a first weak acid washing treatment and a heating treatment on the etching foil; and S200: performing a second film forming treatment on the etching foil, and the second film forming treatment comprises performing a second boiling treatment and a second weak acid washing treatment on the etching foil. The preparation process of the formation foil and the formation foil prepared by the preparation process can form a hydrated oxide film with a relatively large thickness, no feather-shaped outer layer and uniform crystal nucleus distribution in etching holes, can greatly improve the subsequent formation treatment efficiency, and can effectively reduce the energy consumption of the subsequent multi-stage formation treatment.