40results about "Capacitor details" patented technology

The invention provides a production method of a capacitor aluminum plastic film and an aluminum electrolytic capacitor formed foil, relates to the field of formed foil production, and aims at providing a high-performance aluminum plastic film structure and a preparation process of the formed foil. The aluminum plastic film sequentially comprises an aluminum electrolytic capacitor formed foil, a bonding layer and a heat sealing layer from inside to outside. The bonding layer is composed of maleic anhydride modified polyolefin, diisocyanate and glycidyl ether type epoxy resin, and the heat sealing layer is formed by compounding polypropylene and polyphenylene sulfide. According to the production of the formed foil, the thickness and the compactness of an oxidation film are gradually improved through multi-section electrolytic oxidation and optimized combination of multiple additives, the pressure resistance, the specific volume and the mechanical strength of the formed foil are remarkably improved, and meanwhile the leakage current is reduced.

The application provides a production method of an aluminum-plastic film and an aluminum electrolytic capacitor formation foil, relates to the field of formation foil production, and is characterized by an aluminum-plastic film structure and a preparation process of the formation foil. The aluminum-plastic film comprises, from inside to outside, an aluminum electrolytic capacitor formation foil, a bonding layer and a heat-sealing layer. The bonding layer is composed of maleic anhydride modified polyolefin, diisocyanate and glycidyl ether type epoxy resin, and the heat-sealing layer is composed of polypropylene and polyphenylene sulfide. The production of the formation foil is realized through multi-stage electrolytic oxidation and optimized combination of various additives, so that the thickness and compactness of the oxidation film are gradually improved, the voltage resistance, specific capacity and mechanical strength of the formation foil are significantly improved, and the leakage current is reduced.

Disclosed herein are charge or electricity generating devices and methods of making and use thereof.

This utility model discloses a vehicle-mounted capacitor fixing device for installing and fixing capacitors. It includes a support frame body, a capacitor fastening structure disposed at one end of the support frame body for fastening the bottom end of the capacitor, a plurality of clamping springs disposed on the side of the support frame body for holding the capacitor, and fixing pins extending from the other end of the support frame body for fixing the capacitor to a circuit board. The support frame body has a square frame structure and a capacitor receiving space for accommodating the capacitor. After the capacitor is accommodated in the capacitor receiving space, it is fixed by the capacitor fastening structure and the clamping springs, and then fixed to the circuit board by the fixing pins. This vehicle-mounted capacitor fixing device can stably and securely install and fix the capacitor to the circuit board, and effectively reduce vibration, preventing premature damage to the capacitor due to resonance between the capacitor and the vehicle body.

The utility model discloses an aluminum electrolytic capacitor with a heat dissipation structure, particularly relates to the technical field of aluminum electrolytic capacitors, and comprises a capacitor body, and the upper end and the lower end of the outer surface of the capacitor body are symmetrically and movably connected with bearing assemblies. A plurality of supporting mechanisms are fixedly connected to the sides, close to each other, of the outer portions of the two bearing assemblies in an annular array mode, a plurality of heat conduction mechanisms are fixedly connected to the sides, close to each other, of the supporting mechanisms at intervals, and heat dissipation mechanisms are fixedly connected to the sides, close to each other, of the heat conduction mechanisms. According to the aluminum electrolytic capacitor with the heat dissipation structure, the bearing assembly can be supported through the supporting mechanism, and heat emitted by the capacitor body during working can be absorbed through the heat conduction mechanism. And under the action of the heat dissipation mechanism, the heat absorbed by the plurality of heat conduction mechanisms can be timely dissipated to the outside, so that the practicability and universality of the device are improved.

The invention belongs to the technical field of metallurgy, and particularly relates to high-apparent-density tantalum oxide and a preparation method thereof. The invention provides a preparation method of high-apparent-density tantalum oxide, which comprises the following steps: adding a urea solution into a fluotantalic acid solution, and carrying out first neutralization reaction to obtain a fluotantalic acid neutralization solution; adding ammonia water into the fluorine tantalic acid neutralization solution, and carrying out a second neutralization reaction to obtain tantalum hydroxide; and calcining the tantalum hydroxide to obtain the high-apparent-density tantalum oxide. According to the present invention, the traditional process is adjusted, the high apparent density tantalum oxide is prepared by using the two-stage neutralization method, the urea is used for neutralization in the first-stage neutralization, the solubility of the urea is high, the dispersion degree of the urea in the solution is good, and the urea is added in the first-stage neutralization so as to form the uniform and fine crystal nucleus without generating the precipitate; and adding ammonia water to slowly neutralize, so that a crystal nucleus slowly grows, and tantalum oxide which is easy to wash and filter, not easy to agglomerate, good in dispersity, regular in crystal form, uniform in morphology and high in loose density is formed.

The utility model discloses a capacitor convenient to adjust compensation capacity, and relates to the technical field of electronic components. The device comprises a shell, a main body assembly is arranged in the shell, and a supplementary assembly is further arranged at the top of the shell; the main body assembly comprises a rotating shaft rotationally connected to the center position in the shell and a fixed shaft fixedly connected to the upper portion in the shell, and one end of the rotating shaft and one end of the fixed shaft extend to one side of the exterior of the shell. The second threaded rod drives the insulating plate to move, so that the insulating plate drives the terminal and the conductive column to move, the length of the terminal is adjusted, the problem that the length of the terminal is inconvenient to adjust according to actual conditions in the prior art is solved, the floating plate drives the piston to move, and the service life of the terminal is prolonged. Therefore, the piston is located below the liquid outlet hole of the supplementing cylinder, the electrolyte in the liquid storage box is automatically supplemented into the shell, and the problem that the electrolyte is inconvenient to automatically supplement in the prior art is solved.

The invention relates to the technical field of tantalum core manufacturing, and discloses a forming method for reducing shape damage of a tantalum core, which comprises the following steps: S1, preparing a wax dragging liquid: weighing stearic acid, dissolving the stearic acid in an ethylene glycol solution, and stirring until the stearic acid is completely dissolved to obtain the wax dragging liquid of the stearic acid; s2, smearing wax dragging liquid: selecting a forming die, dipping the wax dragging liquid and uniformly smearing the wax dragging liquid in an inner cavity of a female die; s3, compression molding: pouring the tantalum core raw powder into a molding mold, and performing compression molding to obtain a molded tantalum core; s4, pre-sintering: pre-sintering the molded tantalum core in an environment of lower than 200 DEG C; s5, sintering: sintering the molded tantalum core in an environment of higher than 1000 DEG C to obtain an anode tantalum core; and S6, forming, wherein the anode tantalum core is placed in a dilute nitric acid aqueous solution, and constant pressure forming is adopted. Through mold treatment, technological parameter control and material matching, the problem of shape damage in the tantalum core forming process of the high-energy hybrid tantalum capacitor is solved, and the anode tantalum core quality and the capacitor reliability are remarkably improved.

The utility model discloses a kind of vehicle-mounted capacitor shock absorber for installing and fixing capacitor, it includes support seat, capacitor fastening structure for being set to the one end of support seat to be used for fastening capacitor bottom, a plurality of clamping spring for being set to the side of support seat and extending to the direction away from capacitor fastening structure to be used for clamping capacitor, and fixed sheet for being set to the other end of support seat, for capacitor is fixedly installed to the fixed sheet on circuit board;Wherein, the extension direction of the fixed sheet is same with the extension direction of the clamping spring.The utility model vehicle-mounted capacitor shock absorber can effectively constrain capacitor, realize the shock absorption of capacitor, prevent capacitor and vehicle body resonance lead to the damage of capacitor.

The utility model relates to the technical field of tantalum capacitors, in particular to an ultra-high-voltage chip tantalum capacitor, which comprises a tantalum capacitor limiting mechanism, a chip capacitor limiting mechanism and a chip capacitor limiting mechanism, the fixing mechanism is fixed at the upper top of the placing box and can limit the ultrahigh-voltage chip tantalum capacitor; and the guide mechanism slides in one side of the placing box and can adjust the electrical connection position. According to the utility model, the designed placement box is fixed on the circuit board, so that a regular placement space can be provided for a plurality of ultrahigh-voltage chip tantalum capacitors, and compared with a traditional series connection mode without a fixing mechanism, the ultrahigh-voltage chip tantalum capacitors are orderly arranged in the storage box, so that random distribution on the circuit board is avoided; the occupied space of the circuit board is greatly reduced, the layout of the circuit board is more compact and reasonable, and miniaturization and integration of electronic equipment are facilitated.

The utility model discloses a horizontal vehicle capacitor, including capacitor body and be used for installing and fixing capacitor body's fixed bolster, capacitor body includes aluminium shell, core bag, apron and set up on the outgoing terminal of apron, fixed bolster includes first fixed clamp, second fixed clamp, the cross -lay reinforcing rib of connecting first fixed clamp with second fixed clamp and the fixed pin of outgoing from first fixed clamp and second fixed clamp respectively, wherein, first fixed clamp and second fixed clamp are used for respectively fastening capacitor body's both ends, the fixed pin sets up in first fixed clamp and second fixed clamp same side, to be used for installing and fixing fixed bolster on circuit board or external device, the utility model discloses horizontal vehicle capacitor can install and fix capacitor stably on circuit board, and effectively restricts capacitor, prevents capacitor and car body resonance and leads to capacitor's premature damage.

The utility model provides an LED driver shell structure convenient to maintain. The LED driver shell structure convenient to maintain comprises an upper cover, a lower cover and a PCB installed in the lower cover. The upper cover is connected with the lower cover; the lower cover comprises a mounting plate and a movable plate which are separated from each other, and the mounting plate and the movable plate are respectively connected with the upper cover through bolts; and the PCB is mounted on the movable plate. A capacitor is installed on the PCB, the capacitor is a bolt type aluminum electrolytic capacitor, and the capacitor is installed on the PCB through a bolt. According to the LED driver, a traditional lower cover integrated structure is changed into a separated structure, the PCB can be independently detached and separated during maintenance, the bolt type aluminum electrolytic capacitor on the PCB can be detached and replaced, and the purpose of prolonging the service life of the LED driver is achieved.

The utility model discloses a surface-mounted aluminum electrolytic capacitor, which relates to the technical field of aluminum electrolytic capacitors and comprises a fixed base, a capacitor is rotatably connected in the fixed base, a clamping assembly is arranged on the outer side of the capacitor, a rebounding assembly is arranged in the fixed base, and a gear shifting assembly is arranged in the fixed base. A fixing assembly is arranged in the fixing base. According to the utility model, by pressing the driving lever, the driving lever is rotated, so that the bottom of the driving lever enters the interior of the fixed base, then the capacitor is rotated anticlockwise, so that the fixed column abuts against the push plate, then the capacitor is extruded along with the first spring, and the driving lever is loosened, so that the driving lever returns to the original position under the action of the second spring, and then the capacitor is loosened. And the second spring drives the pushing plate to push the fixing column to abut against the bottom of the shifting rod, so that the capacitor is fixed, the capacitor is more convenient to install, and the capacitor is more convenient to replace.

The invention discloses a preparation method of a multi-color modulation electrochromic energy storage device based on Nb2O5 and a PANI electrode. The whole device is of a composite layered structure and sequentially comprises an electrochromic functional layer loaded with an Nb2O5 cathode film, an ion conduction layer formed by a lithium salt solution and an ion storage functional layer loaded with a PANI anode film from top to bottom. A 3M double-sided tape is used as a spacing layer between the two electrodes, and the device is sealed and packaged through an ultraviolet curing adhesive. The device is simple and convenient in preparation process and low in cost, can break through the limitation of single color switching of a traditional Nb2O5-based device, realizes rich multi-color regulation and control, has an energy storage function, can be widely applied to the fields of intelligent glasses, new energy automobile display parts and the like, and has a wide market application prospect.

A surface-mounted aluminum electrolytic capacitor comprises a capacitor body and a base, the base comprises a base body and a back plate, and the back plate is arranged on the base body; the seat body and the back plate form an accommodating space of the capacitor body, a lead groove is formed in the bottom of the seat body, the lead groove is in butt joint with a lead through hole in the seat body, and an arc-shaped protruding step is arranged at one end, close to the lead through hole, of the lead groove. According to the surface-mounted aluminum electrolytic capacitor of the utility model, one end, close to the aperture, of each of the two lead grooves of the base plate is provided with an arc-shaped protruding step, so that the stress area at the break angle of the lead is increased, right-angle bending is avoided, and the break angle is in a curved surface shape; therefore, the problems of poor stress resistance, lead tail end height difference and the like in the traditional design are effectively improved; meanwhile, the arc-shaped protruding steps can effectively reduce the tilting of the tail end of the lead after reflow soldering of the surface-mounted electrolytic capacitor.

According to the design scheme of the non-shell press-fitting-free concentrated insulation type aluminum electrolytic capacitor module, an aluminum shell of an aluminum electrolytic capacitor single body is omitted, the core bag is directly assembled with a nest hole cavity of the metal heat conduction base body component, an efficient heat conduction path is established between the hot spot center of the core bag and the metal heat conduction base body component, and the heat conduction efficiency is improved. Most of thermal resistance conducted to the metal heat conduction base body component by the heat of the core cladding is eliminated; and particularly, a press-fitting process is saved, so that the capacitor module is easy to manufacture, the performance and the reliability are improved, and the cost is also greatly reduced.

The invention relates to the technical field of photovoltaic inverters, in particular to an efficient ripple current aluminum electrolytic capacitor module for a photovoltaic inverter, which comprises a plurality of capacitor modules arranged on a circuit board in parallel, and each capacitor module comprises an aluminum electrolytic capacitor unit and a distributed heat dissipation structure; the aluminum electrolytic capacitor unit is composed of a high-purity aluminum foil, a mixed electrolyte and a high-temperature-resistant sealing shell; the distributed heat dissipation structure is formed by compounding an aluminum fin and a nano ceramic coating substrate, and is attached to the surface of the aluminum electrolytic capacitor unit shell in a spiral shape. According to the invention, the ethylene glycol-based electrolyte and the ionic liquid are compounded, and the nano aluminum oxide particles are added to form an ion rapid channel, so that electrolyte polarization suppression and ion mobility improvement are completed, namely, the ripple current endurance capability is improved; through the composite design of the aluminum fins and the V-shaped diversion trenches, the turbulence intensity of airflow is improved, the interface thermal resistance is reduced, and the effect of reducing temperature rise under the same heat dissipation area is achieved.

The utility model belongs to the field of aluminum electrolytic capacitor dies, and provides an ultra-thin aluminum electrolytic capacitor machine die, which comprises a die base and a connector fixed on the upper surface of the die base, a high-speed steel clamp body is mounted on the peripheral side of the connector, and an elastic part is arranged on the peripheral side of the connector; the elastic part comprises a plurality of reserved grooves formed in the peripheral side of the connecting body, and comprises through grooves formed in the peripheral side of the connecting body and connected with the reserved grooves; due to the fact that the reserved groove and the through groove are arranged, and the reserved groove is in a gap shape, when the connecting body is closed, the end of the connecting body can be locked, and therefore a product is clamped. The size of the through groove is larger than that of the reserved groove, the through groove can reduce the width of the connecting body, when the width of the connecting body is reduced, the elasticity of the connecting body at the through groove is improved along with closing of the end of the connecting body, the connecting body is prevented from being too hard, and the clamping sensitivity is improved.

The invention relates to the technical field of capacitors, in particular to a combined aluminum electrolytic capacitor and a production process thereof, the combined aluminum electrolytic capacitor comprises a plurality of capacitor monomers which are detachably connected, each capacitor monomer is enclosed by a shell, a lower end cover and an upper end cover to form an accommodating cavity, and an electrode assembly, electrolyte and a liquid bag filled with thermal expansion liquid are arranged in the accommodating cavity; the two ends of the upper end cover are provided with a male connecting part and a female connecting part respectively, and the male connecting part and the female connecting part are detachably connected and provided with a male channel, a female channel, a male blocking assembly and a female blocking assembly, the problems that an aluminum electrolytic capacitor is insufficient in mechanical stability, uneven in electrolyte permeation, poor in electrochemical performance consistency and low in detection efficiency due to the fact that a core body is too thick can be solved, on-demand assembly is achieved through modular design, the liquid bag is used for driving the electrolyte circulation balance performance, the product reliability and the production yield are improved, and the production cost is reduced. And the method is suitable for high-power and miniaturized application scenes.

The utility model discloses a high heat dissipation electrolytic capacitor device, which belongs to the technical field of electrolytic capacitors, aims to solve the problems of limited heat dissipation capability and uneven heat dissipation of a capacitor device, and comprises a bottom plate, two sides, the front end and the rear end of the bottom plate are fixedly connected with mounting lugs, and the center position of the top of the bottom plate is fixedly connected with a positioning groove. According to the utility model, through the arrangement of the heat dissipation mechanism, when a capacitor operates, heat dissipation fans and a servo motor are turned on, the servo motor drives a gear to rotate, so that an outer gear ring meshed with the gear rotates along with the gear, and an annular sleeve drives the two heat dissipation fans at the top of the annular sleeve to rotate and circulate; and the operation of the cooling fan can promote the uniform flow of air around the capacitor, so that the problem of over-high local temperature can be avoided, the more uniform cooling effect of the surface and the periphery of the capacitor is ensured, the service life of the capacitor is prolonged, and the stability and the performance of the capacitor are improved.

The invention relates to a high-voltage-resistant aluminum electrolytic capacitor, which comprises a core bag, a shell and a sealing element, the core bag is arranged in the shell through a sealing piece; the core cladding is formed by winding an anode foil, electrolytic paper and a cathode foil, and the core cladding is impregnated with an electrolyte; and a PVA film is coated on the electrolytic paper. According to the method, the surface of the conventional electrolytic paper is coated with a layer of PVA, in the impregnation process of capacitor manufacturing, the electrolytic paper adsorbs a low-viscosity electrolyte, the electrolyte can effectively permeate into aluminum foil holes, and in the electrolyte permeation process and the aging process, the PVA is dissolved in the electrolyte under the effect of self heating of the capacitor, so that the capacitor is prevented from being damaged, and the service life of the capacitor is prolonged. And the high-voltage resistance of the capacitor can be effectively improved.

The utility model discloses a kind of vertical vehicle-mounted capacitor, including capacitor body and the fixing device for installing and fixing capacitor body;The capacitor body includes aluminum shell, the core package encapsulated in aluminum shell, the cover plate for the core package encapsulation in aluminum shell, and the lead-out terminal being set on cover plate;The fixing device includes capacitor fixing seat, anti-explosion clamping spring piece and the fixed pin being set on capacitor fixing seat;Wherein, the capacitor fixing seat and the anti-explosion clamping spring piece form a containing space containing capacitor body;Capacitor body is contained in the containing space, and is installed and fixed on circuit board by the fixed pin and lead-out terminal.The utility model vertical vehicle-mounted capacitor can be stably and firmly installed and fixed on circuit board, prevent capacitor and vehicle body resonance cause capacitor's premature damage.

The invention relates to an electrolyte solution for an aluminum electrolytic capacitor and application of the electrolyte solution in a solid aluminum electrolytic capacitor with high capacitance, the electrolyte solution is prepared by compounding PEDOT: PSS dispersion liquid, a solvent and three additives (namely perfluorohexyl ethyl methyl dimethoxy silane, perfluorosulfonic acid resin and polyvinyl butyral), according to the additive, by reducing the water vapor transmission rate, inhibiting dissociation of acid sulfonic acid groups, enhancing the film foil interface adhesive force and inhibiting interface stripping and dielectric layer hydration thickening caused by moisture absorption expansion and reduction dedoping of PEDOT: PSS, the temperature resistance and the moisture resistance of the aluminum electrolytic capacitor are improved, and the service life of the aluminum electrolytic capacitor is prolonged.

The utility model discloses a kind of vehicle-mounted capacitor fixed shockproof devices, for installing and fixing capacitor, it includes capacitor fixed frame and the fixed foot led out from capacitor fixed frame;Wherein, the capacitor fixed frame is through square frame structure, capacitor fixed frame is provided with capacitor accommodation space, to accommodate capacitor;Fastening piece is arranged on the side surface of capacitor fixed frame staggeredly, to be used for fastening capacitor in capacitor accommodation space;The both ends of capacitor fixed frame are set to square opening, and the fixed foot is led out on the four corners of square opening in one end, and is fixedly installed on circuit board or external device by the fixed foot. The utility model vehicle-mounted capacitor fixed shockproof device can stably and firmly install capacitor on circuit board, and shock absorption is carried out to capacitor, shock absorption of capacitor is realized, to prevent capacitor and vehicle body resonance from causing capacitor damage.

The utility model relates to an integrated super energy storage module, which is characterized by comprising a shell and a capacitor monomer, wherein the shell is provided with an accommodating cavity; a plurality of capacitor monomers are mounted in the accommodating cavity; a positive collector plate and a negative collector plate which are used for collecting current are arranged on one side close to the pins of the capacitor monomers; positive pins of the capacitor monomers are connected in parallel with the positive collector plate; the negative electrode pins of the capacitor monomers are connected in parallel with the negative electrode collector plate. One end of the positive electrode collector plate is provided with a positive electrode output port, the positive electrode output port penetrates out of the shell and is exposed, one end of the negative electrode collector plate is provided with a negative electrode output port, and the negative electrode output port penetrates out of the shell and is exposed. The energy density and the integration degree of the module are greatly improved, the performance of the module is greatly enhanced, and the capacitor module has wide market requirements in the national strategic emerging industries such as rail transit, electric automobiles, photovoltaic energy storage and intelligent electric appliances.

The utility model relates to a heat dissipation type aluminum electrolytic capacitor which comprises a shell, an aluminum electrolytic capacitor body is installed in the shell, an outer spiral pipeline is installed between the aluminum electrolytic capacitor body and the inner wall of the shell, and the edge side of the top end of the outer spiral pipeline is communicated with a rotating pipe. The other end of the rotating pipe extends into the side wall of the shell and is connected with a heat dissipation pipeline, the heat dissipation pipeline extends downwards to the inner bottom of the side wall of the shell, and the inner bottom of the shell is connected with an auxiliary assembly. The utility model relates to the technical field of heat dissipation of aluminum electrolytic capacitors. According to the heat dissipation type aluminum electrolytic capacitor, the aluminum electrolytic capacitor body can dissipate heat without being influenced by the external temperature, and can dissipate heat independently, so that the heat dissipation effect of the aluminum electrolytic capacitor body cannot be influenced by the external temperature change during heat dissipation.

Provided is a method for manufacturing a photoelectric conversion element, which suppresses unevenness in the color of a dye. A method for manufacturing a dye-sensitized solar cell (10) in which a first substrate (20) and a second substrate (21) are bonded together, in which a porous semiconductor layer (30) is formed on the first substrate (20), and a dye solution (32) containing a dye (32C) is printed on the first substrate (20) or the second substrate (21).

The utility model discloses a vehicle-mounted anti-vibration capacitor, including capacitor body and capacitor shockproof fixed bolster, the capacitor body includes aluminium shell, the core bag of encapsulation in aluminium shell, the cover plate for the core bag encapsulation in aluminium shell to set up the outgoing terminal on the cover plate, the shockproof fixed bolster includes at least two annular cover, the multiple reinforcing bars of connecting annular cover and be used for the multiple fixed feet of capacitor fixed, wherein, two annular cover sets up respectively at the both ends of shockproof fixed bolster, and the center axis of two annular cover coincides with capacitor body, and two annular cover and the multiple reinforcing bars of connecting two annular cover form a cylindrical space to place capacitor body. The utility model discloses vehicle-mounted anti-vibration capacitor can be stably firmly installed and fixed on the circuit board, and the shock absorption of capacitor is carried out, the anti-vibration performance of capacitor is promoted, and the premature damage of capacitor and vehicle body resonance is prevented.

The utility model belongs to the technical field of coil nailing devices, and particularly relates to a full-automatic coil nailing device for an electrolytic capacitor, which comprises an L-shaped plate, a coil nailing component and a conveying component are arranged on one surface of a vertical plate of the L-shaped plate, a dust removal component is arranged on the other surface of the vertical plate, the coil nailing component comprises a mounting frame, and the mounting frame is arranged at the top end of the vertical plate. A groove is formed in the inner side wall of the mounting frame in a penetrating mode, a spray needle pump is arranged at the top end of the groove, a needle inlet pipe is arranged at the top end of the spray needle pump in a penetrating mode, a nozzle is formed in the other end of the groove, a supporting block is arranged on a transverse plate of the L-shaped plate, and an electric telescopic cylinder is obliquely arranged at the top end of the supporting block; and a cut-off tool is arranged at the top end of a telescopic rod of the electric telescopic cylinder, a collecting box is arranged at the top end of the transverse plate, and the collecting box is located under the roll nailing assembly, so that particles can be prevented from falling on electrolytic paper in the conveying process in a matched mode, and therefore the quality of products is improved.

The invention is applicable to the technical field of materials, and provides a high-voltage electronic aluminum foil uniform corrosion preparation method which comprises the following steps: immersing degreased aluminum foil into a hydrochloric acid solution for activating treatment; the preparation method comprises the following steps: by taking aluminum foil as an anode and graphite as a cathode, carrying out constant-current electrochemical corrosion in a specific electrolyte solution which is a 0.1-0.15 M aqueous solution formed by mixing rubidium bromide, triethyl iodide sulfur and tetrabutylammonium bromide according to a molar ratio of (1-3): 1: 1, and under the process conditions that the temperature is 50-60 DEG C, the current density is 70-90mA / cm < 2 > and the corrosion time is 20-40s; and washing the pre-corroded aluminum foil with water, and carrying out main electrochemical corrosion to obtain a finished product. Uniform initial corrosion sites are formed through specific halide ions, tunnel holes are guided to uniformly grow along the (100) crystal face, the effective specific surface area and specific capacitance are remarkably improved, technological parameters are controllable, stability is high, the improvement cost is low, the method is suitable for industrial production, and related products are excellent in performance.