36 results about "Aluminium paste" patented technology

The invention provides aluminum paste overprinted on a BC battery silver grid line, a preparation method of the aluminum paste and the BC battery grid line, and belongs to the technical field of BC batteries. The aluminum paste comprises 65-90 parts by mass of aluminum powder; 2-10 parts by mass of glass powder; 2-5 parts by mass of an organic resin; 10-20 parts by mass of a solvent; 0-2 parts by mass of an additive; wherein the glass powder adopts bismuth-boron glass powder with the softening point of 400-500 DEG C. By adopting the bismuth-boron glass powder with low softening point temperature, silver-aluminum alloy is reduced during sintering at the medium-high temperature of 580-630 DEG C, the silver-aluminum lap resistance is reduced, the low composite level of the grid line is ensured, the electrical property of the grid line is improved, the replacement of silver paste by aluminum paste in a BC battery is realized while the light conversion efficiency is high, and the cost is reduced.

The embodiment of the present application provides an IBC battery aluminum paste, a preparation method thereof and an IBC battery. The IBC battery aluminum paste provided by the embodiment of the present application comprises aluminum powder, boron powder, glass powder, fumed silica, an organic binder and an organic auxiliary agent. By adding fumed silica into the aluminum paste, the fumed silica can be uniformly distributed around the aluminum powder during the process of forming fine grids of the aluminum paste, so as to block the mutual fusion of the aluminum powder and aluminum powder, reduce the difference of stress release coefficient between the aluminum paste and the silicon wafer, and reduce the warping of the IBC battery during the cooling after sintering, thereby solving the problem that the existing IBC battery aluminum paste is prone to causing the warping of the IBC battery and causing the hidden cracking of the battery wafer when being printed into a positive electrode grid line.

Some embodiments of the present disclosure provide an N-type TOPCon cell with double-sided aluminum paste electrodes, and a preparation method therefor. The front side of the cell is provided with a front-side silver main grid and a front-side aluminum fine grid, and the back side is provided with a back-side silver main grid and a back-side aluminum fine grid. The method for preparing the cell includes: texturing→B diffusion→BSG removal→alkali polishing→depositing a tunnel oxide layer and a polysilicon layer on a back side of a substrate by means of LPCVD→P diffusion on the back side→PSG removal→plating removal→deposition of an AlOx preparatory layer and a first SiNxHy preparatory layer on the front side→deposition of a second preparatory layer SiNxHy on the back side→UV laser ablation on the front side of the substrate and the back side of the substrate→screen printing.

The present disclosure generally relates to a fire-through aluminium paste composition to selectively fire through a passivation layer, and fired compositions thereof. In particular, the fire-through aluminium paste composition of the present disclosure comprises an aluminium component and a glass component, wherein the glass component comprises at least two glass frits. The present disclosure also relates to a processes for preparing a fire-through aluminium paste composition, and its use in the manufacture of a bifacial PERC solar cell.

The application provides a solar cell, which comprises a front surface provided with at least one main grid line and a plurality of sub-grid lines arranged at intervals and vertically to the main grid line, and is characterized in that further comprising a back surface provided with a plurality of fine grid lines arranged at intervals and in parallel to the sub-grid lines. The application also provides a double-sided shingle module with the cell structure and a printing screen for printing the back surface structure of the cell. The back surface structure of the application replaces the full back surface covering of the existing back surface with aluminum paste with fine grid lines formed by aluminum paste, which can reduce the amount of aluminum paste in the back surface and improve the output power of the cell module, so that the conversion efficiency of the shingle module can reach 24.48% at most, and the optimal interval and line width of the fine grid lines are provided; and the warping degree of the back surface of the cell after sintering can be kept within the range of 1.1-1.3 mm.

The utility model relates to a water circulation mechanism for aluminum powder paste production, which comprises a water circulation machine main body, the water circulation machine main body comprises a mounting frame, a settling box and a filter box, one side of the settling box is provided with a feed port, a guide block is arranged in the settling box, the bottom of the guide block is provided with a coarse filter plate, and the bottom of the settling box is provided with a first discharge port. A first communicating pipe is arranged between the settling tank and the filter tank, a fine filter plate, a purification plate and an adsorption plate are arranged on the filter tank, a second discharge port is formed in the bottom of the filter tank, a water pump is arranged on one side of the filter tank, and second communicating pipes are arranged between the water pump and the filter tank and between the water pump and the settling tank; a water circulation structure is formed by arranging a settling tank, a first communicating pipe, a filtering tank, a water pump and a second communicating pipe, cyclic utilization of water resources is achieved, a coarse filtering plate is driven to shake in the horizontal direction by arranging a driving motor, an eccentric wheel, a connecting arm and a connecting rod, and filtering of the water resources by the coarse filtering plate is promoted.

The application discloses a low-VOC amino baking paint effect pigment paint composition, which comprises, in percentage by weight, 4.5-7.5 % of aluminum paste, 12.0-16.0 % of thermosetting acrylic resin, 14.0-18.0 % of polyester resin, 8.0-12.0 % of amino resin, 1.0-3.0 % of blocked isocyanate resin, 0.3-0.8 % of cellulose acetate butyrate, 4.5-6.5 % of microgel-acrylic resin polymer, 0.9-1.3 % of anti-settling wax, 0.1-0.4 % of other additives and 38.0-44.0 % of solvent. The spraying body fraction of the effect pigment paint composition is greater than 41 %, the spraying viscosity range is 19.5-21.5 seconds / 20 DEG C * coating 4 cups, the VOC content under the spraying viscosity meets the requirements of GB / T38597-2020 'Low Volatile Organic Compound Content Coating Product Technical Requirements' - VOC content in solvent-based coatings - requirements of the VOC content in automobile original factory coatings (passenger cars) - basecoat - effect pigment paint - limit value (g / L) <580, and the effect pigment paint has good aluminum powder directional effect, gloss, flicker (FF value) and leveling property, and can meet the matching use with liquid single-component varnish and powder varnish at the same time. The application further discloses an effect pigment paint comprising the baking paint composition and a preparation method and application of the effect pigment paint.

The invention provides an aluminum paste stirring device facilitating aluminum powder feeding, the aluminum paste stirring device facilitating aluminum powder feeding comprises a stirring system, a feeding system and a driving system, the stirring system comprises an aluminum paste stirring kettle and an aluminum paste stirring device, an aluminum powder feeding port is formed in the upper portion of the aluminum paste stirring kettle, and an aluminum powder feeding port is formed in the lower portion of the aluminum paste stirring kettle. The feeding system comprises a turnover device fixing frame, a turnover device fixing shaft, a turnover device pouring frame, an aluminum powder discharging inserting opening, an isolation plate, a feeding switch valve, an aluminum powder conical cover, a feeding platform, an aluminum powder feeding lifting table and a turnover device stable supporting frame, and the driving system comprises a turnover device motor and an aluminum material lifting motor. Through the synergistic effect of the overturning type feeding system, the stirring system and the driving system, closed conveying, automatic feeding and efficient mixing of aluminum powder are achieved, and the aluminum paste production efficiency and the product quality are improved.

The composition for a coating material according to one embodiment of the present disclosure includes an epoxy resin, a curing agent resin, and a diluting solvent, the curing agent resin including two or more types selected from the group consisting of a polyamide resin, an amide adduct resin, a phenolic amine, and a phenolic amide, and the total content of the diluting solvent in the composition for a coating material is 5 to 20 wt%.

The utility model relates to the technical field of ball mills, and discloses a ball mill for aluminum paste production, which comprises a mounting frame, a feeding shaft is rotatably connected in the mounting frame, a barrel body is fixedly connected to the right side of the feeding shaft, an air inlet pipe is fixedly connected to the right side of the barrel body, and a blanking seat is fixedly connected to the outer side of the barrel body. And a discharging plate is slidably connected to the interior of the discharging seat, a driving assembly used for rotating the barrel body is installed on the left side of the installation frame, a feeding pipe is rotatably connected to the interior of the feeding shaft, a sealing seat is fixedly connected to the top end of the feeding pipe, and a long rod is installed in the sealing seat. According to the sealing device, the sealing plate is matched with the sealing strip under the pushing of the connecting rod to seal the interior of the ball mill, so that the barrel body does not need to be opened when aluminum paste is added again, time waste caused by frequent uncovering is avoided, and the working efficiency is improved.

The application discloses an isolation material, a battery back field back pole and a preparation method, and a solar cell and a preparation method, and belongs to the technical field of crystalline silicon solar cell preparation. The back field back pole comprises a silicon back surface base, an aluminum electrode and a silver electrode. The aluminum electrode is arranged on the silicon back surface base. The silver electrode is arranged on the aluminum electrode. An isolation layer is arranged between the silver electrode and the aluminum electrode. The isolation layer is composed of the following components: glass powder, auxiliary powder, an organic carrier and an additive. The weight percentage of the glass powder is 35-80%. The weight percentage of the auxiliary powder is 0.5-25%. The weight percentage of the organic carrier and the additive is 15-45%. The application inserts an isolation layer between the silver electrode and the aluminum electrode, blocks the direct contact of the silver electrode and the aluminum electrode, effectively isolates the mutual penetration of the silver paste and the aluminum paste in the sintering process, and realizes the improvement or solution of the performance of the full-aluminum back field battery, such as the quality of the battery, the welding of a module and reliability.

The present invention discloses an organic carrier for double-sided PERC aluminum paste and a preparation method thereof, belonging to the technical field of solar cells. The organic carrier for double-sided PERC aluminum paste includes an organic binder, a thixotropic agent, and a surface dispersant. The mass ratio of the organic binder, the thixotropic agent, and the surface dispersant is organic binder:thixotropic agent:dispersant = (150 - 200):(1.5 - 3.5):(2.5 - 4.5). By using an organic carrier composed of specific organic binder, thixotropic agent, and surface dispersant, the present invention can balance the two aspects of metallization contact and passivation of double-sided PERC aluminum paste, and at the same time has good printing performance and plasticity, significantly improving important parameters such as the strength of PL corrosion, contact resistance, line resistance, BSF thickness, doping concentration, and passivation film corrosion, significantly improving the efficiency and increasing the double-sided rate.

Methods for reducing a concentration of hexavalent chromium within a first aluminum slurry by adding a reducing agent to form a second aluminum slurry are provided. The reducing agent causes a chemical reduction reaction with the hexavalent chromium compound of the first aluminum slurry to form a trivalent chromium compound within the second aluminum slurry such that a first weight ratio of hexavalent chromium to trivalent chromium in the first aluminum slurry is decreased to a second weight ratio of hexavalent chromium to trivalent chromium in the second aluminum slurry, with the second weight ratio being less than the first weight ratio.

The present application discloses a modified light-diffusing particle, a preparation method thereof, and a diffusion film. The preparation method of the modified light-diffusing particle includes: subjecting PMMA spherical diffusion powder with a particle size of 3 to 15 μm and a refractive index of 1.49 to ultrasonic oscillation in anhydrous ethanol and deionized water with a ratio of 2:1 to obtain a PMMA powder mixed solution; heating the PMMA mixed solution to 90°C, and then slowly adding the PMMA mixed solution at 90°C to an aqueous aluminum paste and refluxing and stirring at a constant temperature of 90°C for 6 h to obtain a modified solution; subjecting the modified solution to vacuum filtration to obtain a filter cake, and washing the filter cake three times with anhydrous ethanol during vacuum filtration; heating the filter cake to 120°C and drying it at 120°C for 12 h to obtain a block; pulverizing the block to obtain modified light-diffusing particles. Coating the modified light-diffusing particles in the light-diffusing layer of the diffusion film helps to improve the brightness of the diffusion film.

The application relates to the technical field of metal electrodes, and discloses an aluminum electrode and a preparation process and application thereof. The preparation process of the aluminum electrode comprises the following steps: printing aluminum paste, wherein the aluminum paste comprises aluminum powder, a metal compound, an organic phase, an inorganic glass phase and conductive carbon nanomaterial, the inorganic glass phase comprises rare earth oxides; sintering the aluminum paste: placing the aluminum paste in a pre-sintering section at 150-350 DEG C, so that the organic phase is volatilized and decomposed; placing the aluminum paste in a middle sintering section at 350-600 DEG C, so that the inorganic glass phase is softened into a glass body, and a silicon-oxygen protective thin layer is formed on the doped polysilicon after etching and anti-reflection passivation; placing the aluminum paste in a post-sintering section at 600-700 DEG C, so that a metal-based composite carbon nanomaterial layer is formed on the silicon-oxygen protective thin layer, the aluminum powder is gradually dissolved, and the aluminum layer is formed on the metal-based composite carbon nanomaterial layer after cooling. The aluminum paste is not in contact with the doped polysilicon in the sintering process, and the obtained aluminum electrode can greatly reduce the interface metal composite and contact resistance.

The utility model provides a kind of continuous mixer of aerated aluminium paste, belong to aluminium paste mixing machine technical field;Including: mixing tank, the inner chamber rotation of mixing tank is connected with the rotation shaft extending to the outside of mixing tank one end, the outer wall of rotation shaft located one end outside of mixing tank is equipped with bearing body, the outer wall of bearing body is equipped with bearing seat, the bottom of bearing seat is fixedly installed with support frame, one end of the outer wall of mixing tank is fixedly installed with rotating ring, the one end of the outer wall of mixing tank away from rotating ring is fixedly installed with driven gear;The utility model is rotated by asynchronous motor drive shaft, make driving gear rotation drive the driven gear meshed with it to rotate, to make mixing tank rotate, driving shaft is rotated simultaneously and will drive driving pulley to rotate, to drive driven pulley to rotate by transmission belt, driven pulley is rotated and will drive rotation shaft to rotate, to make stirring rod to stir, the direction of stirring rod rotation is opposite with the direction of mixing tank rotation.

The invention provides a manufacturing process of an automobile headrest LOGO capable of emitting light and displaying and having a hiding effect, which comprises the following steps: by taking a light-transmitting skin as a base material, spraying an insulating waterproof varnish and drying after carrying out O and Ar mixed plasma cleaning, corona and prime coat treatment; high-transmittance silver nanowires or PEDOT: PSS composite ink is printed for the first time, a PEDOT: PSS aqueous solution is sprayed for the second time, and a transparent conductive motor is formed; printing inorganic fluorescent powder ink to form a LOGO pattern, performing lamination printing on insulation ink twice to form an insulation layer, printing conductive silver paste / aluminum paste as a back electrode, spraying a SiOx inorganic barrier layer and then covering a UV curing organic buffer layer during packaging, adhering and connecting an FPC film and the electrode by using room temperature curing silver paste, and performing leather cutting, sewing and assembling after testing to finish manufacturing. The functions that the LOGO of the headrest is completely hidden when power is off and the LOGO uniformly emits light when power is on are achieved, meanwhile, the LOGO strength is improved, the insulation and waterproof performance is improved, the service life is prolonged, and the high-end and intelligent production requirements of automobile interiors are met.

The invention relates to a preparation method of carbon fibers for electromagnetic repair and shielding, which is applied to the field of electromagnetic functional materials and comprises seven steps of pretreatment, vacuum chamber preparation, evaporation and deposition, post-treatment, dipping treatment, drying and curing control and rolling and cutting. According to the invention, the problems of high cost, complicated construction, poor environmental protection property, unstable performance and the like of the existing electromagnetic repairing materials such as spraying silver paste, aluminum paste and the like are solved; the prepared carbon fiber has the characteristics of high structural strength, excellent electromagnetic shielding performance, light weight, capability of being co-cured with equipment prepreg and the like, and is suitable for electromagnetic repair and shielding scenes in the fields of composite materials, electronic communication, military industry parts and the like.

The present invention discloses a gridline slurry for a bifacial PERC cell and a preparation method thereof, belonging to the field of battery electrode slurries. The present invention reduces the resistance of the slurry by using a mixture of aluminum-boron alloy powder and aluminum powder as the aluminum-boron conductive phase, which can reduce the series resistance of the cell and improve the front conversion efficiency of the cell. By limiting the content of boron and oxygen elements in the aluminum-boron alloy powder, the resistance of the slurry is significantly reduced, and aluminum beads are less likely to appear after sintering. By using specific glass powder in combination with the aluminum-boron alloy powder, the line resistance and contact resistance of the back field slurry can be effectively reduced, thereby improving the slurry filling and improving the conversion efficiency. Compared with traditional aluminum paste, the gridline slurry of the present invention can reduce the line resistance by 5-30%, and can improve the conversion efficiency of the cell by 0.05-0.2%.

The application discloses a preparation method of a directional graphene heat dissipation material for an air compressor cylinder body, and comprises the following steps: S1, carbon fibers are taken, and an oxidized graphene layer is formed on the surface of the carbon fibers through a multistage oxidized graphene microdrop spraying mechanism; S2, high-temperature reduction is performed to form a graphene layer on the surface of the carbon fibers; S3, aluminum paste is sprayed on the surface of the carbon fibers to form an aluminum layer; S4, sintering is performed to form a carbon fiber / graphene / aluminum directional heat dissipation material; S5, the cooled carbon fibers are woven to form a directional heat dissipation core body; and S6, the directional heat dissipation core body is taken as a matrix, and an aluminum liquid is poured and formed into the cylinder body. After the carbon fiber bundle is arranged with multistage directional graphene films through the three-stage oxidized graphene microdrop spraying mechanism, the carbon fiber / graphene / aluminum heat conduction material is prepared, and the three-dimensional directional heat conduction core body is formed after being woven. After the three-dimensional directional heat conduction core body is integrally formed with the cylinder body, the heat conduction coefficient can be increased by more than 5 times. The heat conduction performance of the air compressor cylinder body is greatly improved.

The invention provides aluminum paste for a powder lamination aluminum foil, the aluminum foil and a preparation method, and belongs to the technical field of aluminum paste preparation. The aluminum paste comprises the following components in parts by mass: 60-80 parts of aluminum powder; wherein the aluminum powder comprises aluminum powder; the D50 of the first aluminum powder is 1-2 [mu] m, the D50 of the second aluminum powder is 3-4 [mu] m, and the D50 of the third aluminum powder is 6-8 [mu] m; 5-10 parts by mass of a binder; 15-30 parts by mass of a solvent; 0.5-1 part by mass of a leveling agent; 0.5-3 parts by mass of a dispersant; and 0.1 to 0.5 part by mass of an antioxidant. According to the aluminum foil, the particle size of the aluminum powder is optimized, the three kinds of aluminum powder with different particle sizes are combined for use, the aluminum powder with different particle sizes are in lap joint, the specific pore channel morphology is formed, pore channels are moderate in size and uniform in distribution, the high specific volume of the aluminum foil can be improved, then the bending resistance is improved, and the service life is prolonged.

The invention discloses an ultrathin anti-corrosion coating and a preparation method of a coating layer of the ultrathin anti-corrosion coating. The composition mainly comprises a main agent and a curing agent in a mass ratio of 5: 1, the main agent is prepared from the following components in percentage by mass: 10 to 30 percent of epoxy resin, 45 to 52 percent of zinc-aluminum pigment, 0.5 to 5 percent of nano indium oxide, 0.1 to 5 percent of PTFE (Polytetrafluoroethylene) modified PE (Polyethylene), 0.1 to 1 percent of dispersing agent, 0.1 to 1 percent of coupling agent, 0.1 to 1 percent of fumed silica and the balance of organic solvent on the basis that the total weight of the main agent is 100. The zinc-aluminum pigment is a mixed pigment of flaky zinc powder and aluminum paste, or is a zinc-aluminum alloy, and aluminum accounts for 5-11% of the total mass of zinc and aluminum. A coating formed by the coating composition disclosed by the invention is still very excellent in corrosion resistance and cathode protection capability under the condition that the thickness of a finished product dry film is 15-20 microns; the method is especially suitable for the thin coating field.

The present invention belongs to the field of photovoltaic power generation technology, and in particular relates to a back electrode pattern structure for a crystalline silicon solar cell, comprising an electrode pattern located on the back of the cell, wherein the electrode pattern comprises a main grid, a secondary grid, and a pad point, wherein the main grid and the pad point are layers of silver paste, and the secondary grid is a layer of aluminum paste. The back electrode pattern structure for a crystalline silicon solar cell provided by the present invention replaces aluminum paste with silver paste in the material of the main grid, increases the number of pad points, designs a secondary grid bus bar, strengthens the current conduction capacity of the main grid, is conducive to increasing short-circuit current, and reduces series resistance, thereby increasing component power and reducing internal electrical losses. At the same time, in order to reduce process precision requirements, a secondary grid gradient thickening structure is designed to ensure good contact between the secondary grid substrate and the pad point.

The application discloses a backflow pipeline for aluminum paste metering and feeding, and relates to the field of pipeline design.The backflow pipeline for aluminum paste metering and feeding comprises, in sequence from the inlet to the outlet, an aluminum paste stirring kettle, an aluminum paste circulating pump, an aluminum paste metering tank and a concrete preparation device, and is connected with the concrete preparation device;feeding valves and cut-off valves are arranged in sequence between the aluminum paste circulating pump and the aluminum paste metering tank;one end of the feeding valve is connected with the aluminum paste circulating pump through a tee joint;the other end of the feeding valve is connected with a backflow valve through the other end of the tee joint;the other end of the backflow valve is connected with the top of the aluminum paste stirring kettle;the pipeline connected in sequence between the aluminum paste stirring kettle, the aluminum paste circulating pump, the feeding valve, the cut-off valve, the aluminum paste metering tank and the concrete preparation device is a feeding pipeline;the pipeline connected in sequence between the aluminum paste stirring kettle, the aluminum paste circulating pump and the backflow valve is a backflow pipeline;the pipeline design is optimized, and linkage control of each component is realized, so that the accuracy of the aluminum paste quality in the aluminum paste metering tank is improved, and the quality of concrete products is improved.

The present invention discloses a brightened reflective printing material, comprising a composite adhesive and a substrate, wherein the composite adhesive encapsulates glass microbeads, aluminum paste, and pigment. The present invention utilizes an aluminum paste containing polyether siloxane in conjunction with a water-based polyurethane adhesive to form a uniform and stable adhesive system with evenly distributed silica and glass microbeads, thereby obtaining a reflective printing coating with a uniform reflective effect. This material overcomes the bottom exposure phenomenon of rotary screen reflective printing, resulting in a brighter and more delicate overall appearance. This addresses the problems of poor appearance, dull and rough surfaces, and darkening surfaces under natural light in existing reflective products. Furthermore, the area of ​​the metal layer encapsulated on the surface of the glass microbeads is 0.2 / 3 of the surface area of ​​the glass microbeads, while the exposed area of ​​the metal layer in the composite adhesive is 1.1 / 2, resulting in excellent water-wash resistance of the printing layer.

The invention provides laminated aluminum paste applied to a BC battery main grid, a preparation method of the laminated aluminum paste and the BC battery main grid, and belongs to the technical field of battery paste. The laminated aluminum paste comprises the following components in parts by mass: 60-80 parts of aluminum powder; 0.8-5 parts by mass of glass powder; 2-5 parts by mass of an organic resin; 15-20 parts by mass of a solvent; 0-2 parts by mass of an additive; wherein the glass powder comprises 50-70% of low-melting-point glass powder and 30-50% of at least one kind of high-melting-point glass powder. Glass with high and low melting points is designed, sintering is carried out at the temperature of about 600 DEG C, on the premise that reliability is ensured, silver-aluminum lap joint resistance is reduced, cell surface recombination is controlled, and photoelectric conversion efficiency is ensured.

The invention relates to the technical field of aluminum paste impurity filtering, and discloses an aluminum paste impurity filtering device for aluminum powder production, which comprises a filtering frame, the top of the filtering frame is communicated with a feeding frame, the surface of the filtering frame is provided with a discharging hole, the bottom of the filtering frame is communicated with a vertical pipe, and the lower surface of the vertical pipe is communicated with a transmission pipe. A sealing door is hinged to the end, away from the conveying pipe, of the vertical pipe, and a sealing block is fixedly connected to the inner wall of the filtering frame. Screen holes can filter aluminum paste, large particles and impurities in the aluminum paste can remain in a triangular groove frame, the large particles and impurities can flow into the top of a filter plate through a screen hole inclined plate to be accumulated, the aluminum paste can be filtered again through the screen hole inclined plate and the filter plate when flowing, and after the aluminum paste is filtered by the triangular groove frame, the aluminum paste can be separated from the triangular groove frame. An electric push rod is started to push a baffle to move, at the moment, a sieve pore inclined plate and a filter plate can slide in a positioning hole, the filter plate is limited by utilizing the positioning hole, and the stability of the filter plate during movement is improved.

The invention provides a resistor aluminum paste, an electrode and a preparation method thereof, and the resistor aluminum paste comprises the following components: aluminum powder, nickel powder, glass powder, organic resin, an organic solvent and an additive; the electrode comprises an electrode base body and a coating layer located on the surface of the electrode base body, the electrode base body contains a nickel-based compact layer, and the nickel-based compact layer is located between the electrode base body and the coating layer. The problem that the bonding strength between the copper or silver surface layer and the electrode base body is poor is solved, and the performance stability of the electrode is guaranteed.

This application relates to the field of electrode foil technology, and provides aluminum paste, electrode foil, and a method for preparing the electrode foil. The aluminum paste includes aluminum powder, a modified binder, a dispersant, and a solvent. The modified binder includes a binder material grafted with multiple modified groups, wherein the modified groups contain at least one of hydroxyl and carboxyl groups. This application employs a synergistic combination of modified binder and dispersant to reduce the introduction of organic materials into the aluminum paste, thereby improving the uniformity of aluminum powder dispersion and preventing aluminum powder agglomeration, thus improving the capacity and mechanical properties of the electrode foil.

The utility model discloses a novel TOPCon battery which comprises a power generation unit and auxiliary grids arranged on the power generation unit, the auxiliary grids are connected through a current collecting assembly for current collection, current of the auxiliary grids 1 is collected, the auxiliary grids and the power generation unit are connected through aluminum paste so as to reduce cost, and compared with silver paste and the aluminum paste, the cost can be reduced, and the cost is reduced. The distance between the auxiliary grids is 1.0-2.0 mm so as to reduce the current transmission distance, the auxiliary grids 1 are connected by adopting aluminum paste, the resistance is increased, and the current transmission capability is improved by reducing the distance between the auxiliary grids 1, so that the cost is reduced, and the current transmission is also ensured. The auxiliary grids and the anti-reflection layer are connected through aluminum paste, cost is reduced, meanwhile, the distance between the auxiliary grids is shortened by half, current transmission is guaranteed, the auxiliary grids and the anti-reflection layer are matched, cost is reduced, and current transmission is the same as before.