Preparation process and equipment of TOPCon photovoltaic cell and glass anti-dust-deposition and high-light-transmission dual-function coating liquid

Abstract

The invention discloses a process and equipment for preparing a TOPCon photovoltaic cell and glass dust deposition prevention and high light transmission dual-function coating liquid, and relates to the technical field of solar cell manufacturing, the coating liquid comprises S < 2 > nano-particles, ZrO2 nano-particles, T < 2 > nano-particles and a surfactant, the surfactant is a perfluoropolyether surfactant and accounts for 0.5% of the total solution mass, and the sum of the mass percentages of the S < 2 > nano-particles, the ZrO2 nano-particles, the T < 2 > nano-particles and the surfactant is 100%. According to the coating liquid prepared through the technology, the surface energy is extremely low after the coating liquid is cured through the synergistic effect of the surfactant and the TiO2, dust attachment is remarkably reduced, surface organic matter can be decomposed through the photocatalytic characteristic of the TiO2 nanoparticles, self-cleaning can be achieved through rain wash, and the coating liquid has the high light transmittance performance and is suitable for being used in the field of light emitting devices. According to the coating liquid, through nano-particle dispersion optimization, multi-layer structure design and accurate pH regulation and control, synergistic interaction of dust deposition prevention and high light transmittance functions is achieved, and meanwhile the coating liquid has excellent weather resistance and construction adaptability.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of solar cell manufacturing, in particular to a TOPCon photovoltaic glass anti-dust and high-transmittance double-function coating solution preparation process and equipment. BACKGROUND

[0002] The Topcon cell is a kind of tunnel oxide passivated contact solar cell technology based on the selective carrier principle, and the cell structure is an N-type silicon substrate cell, an ultrathin silicon oxide layer is prepared on the back of the cell, and then a doped silicon thin layer is deposited, and the two together form a passivation contact structure, which effectively reduces surface recombination and metal contact recombination, and in the manufacturing process, coating needs to be performed on the photovoltaic glass surface.

[0003] In the prior art document, the publication number CN109456665A discloses a kind of photovoltaic glass coating solution and preparation method thereof, relating to glass coating solution field, including the following weight parts of raw materials: acrylic resin 50-60 parts, phenyl trimethoxysilane 8-15 parts, polyvinyl alcohol 4-9 parts, modified nano silicon dioxide 4-9 parts, organic alcohol solvent 100-120 parts, N-methyl pyrrolidone 1.5-5 parts, crosslinking agent 1-3 parts, catalyst 0.8-1.8 parts and silane coupling agent 1.6-3.5 parts.The application provides a kind of photovoltaic glass coating solution and preparation method thereof, the acrylic resin in the coating solution is grafted under the action of crosslinking agent and catalyst, phenyl trimethoxysilane, which improves the weather resistance of acrylic resin, and simultaneously improves the adhesion of the coating solution by compounding polyvinyl alcohol, and the excellent light transmittance of the coating solution can improve the photoelectric conversion efficiency of photovoltaic glass.

[0004] With the rapid development of photovoltaic power generation, the demand for high-transmittance, self-cleaning functional materials is increasingly urgent, and the traditional coating technology has the problems of high surface energy, easy dust accumulation and low light transmittance, which leads to the efficiency decay of photovoltaic modules, the increase of glass energy consumption and the rise of cleaning and maintenance costs.In addition, in the preparation process of the existing coating solution, the uneven dispersion of nanoparticles, the film defects caused by impurity residues, and the high-energy mechanical stirring system seriously restrict the product performance and industrial application.In the process level, the traditional centrifugal filtration equipment relies on a single conical separation structure, and the grading efficiency of micrometer-sized particles is low, and the mixing is uneven during the stirring process of high-viscosity coating solution, which has high energy consumption. SUMMARY

[0005] The purpose of the present application is to provide a TOPCon photovoltaic glass anti-dust-high light transmittance dual functional coating solution preparation process and equipment, which solves the following technical problems: the traditional coating technology has high surface energy, easy dust accumulation and low light transmittance, which leads to photovoltaic module efficiency decay, increased glass energy consumption and rising cleaning and maintenance costs, and the traditional centrifugal filtration equipment relies on a single conical separation structure, has low grading efficiency for micron-sized particles, and has uneven mixing and high energy consumption during the stirring process of high-viscosity coating solution.

[0006] The purpose of the present application can be achieved by the following technical solutions:

[0007] A TOPCon photovoltaic glass anti-dust-high light transmittance dual functional coating solution preparation process, comprising the following steps:

[0008] S1: raw material preparation, SiO2 nanoparticles, ZrO2 nanoparticles, TiO2 nanoparticles, surfactant, dispersant, buffer and organic solvent.

[0009] S2: mixing and dispersing, nanoparticle pre-dispersion: after weighing silica, zirconia and titanium dioxide nanoparticles according to the mass ratio, adding them into the organic solvent respectively, using ultrasonic dispersion equipment to perform ultrasonic treatment on each nanoparticle separately, ensuring that the nanoparticles are fully dispersed, and mixing the dispersed nanoparticle solution to ensure uniform mixing.

[0010] S3: centrifugal filtration, using a preparation device to perform centrifugal treatment on the mixed solution obtained in step S2, screening out impurities and particulate matter in the particle solution, and adjusting the volume of the prepared mixed solution.

[0011] S4: mixing and adjusting, using a preparation device, adding a dispersant to the mixed solution obtained in step 3 under stirring, the amount of dispersant added being 1%-3% of the total mass of nanoparticles, continuing to stir to make the dispersant uniformly dispersed, and further improving the dispersion stability of the nanoparticles. Under stirring, slowly add an environmentally friendly surfactant, continue to stir to ensure uniform distribution of the surfactant.

[0012] S5: pH value adjustment, sampling the mixed solution in the preparation device, detecting the pH value of the solution using a pH meter, adding an appropriate amount of buffer as needed to adjust the pH value, stirring for 10 minutes after each adjustment of the pH value and re-detecting to ensure stable pH value.

[0013] S6: static stabilization, placing the filtered mixed solution (coating solution) meeting the pH value for 24 hours to remove bubbles and further stabilize the solution, obtaining a TOPCon photovoltaic glass anti-dust-high light transmittance dual functional coating solution.

[0014] The particle size of SiO2 nanoparticles, ZrO2 nanoparticles and TiO2 nanoparticles in step S1 is 10-50 nm, the purity is greater than or equal to 99.5%, the surfactant is a perfluoropolyether surfactant, the proportion is 0.5% of the total solution mass, the dispersing agent is polyethylene glycol, the buffer is a phosphate buffer, and the organic solvent is a mixed solvent of ethanol and deionized water, and the ratio of ethanol to deionized water is 1:1.

[0015] In S2, the mass ratio of SiO2:ZrO2:TiO2 is 5:3:2.

[0016] In S5, the pH value of the solution is adjusted to neutral, and the pH value is 6.5-7.5.

[0017] Another object of the present application is to provide a TOPCon photovoltaic cell comprising a TOPCon photovoltaic glass coated with a TOPCon photovoltaic glass anti-dust and high-transmittance double-function coating solution.

[0018] Another object of the present application is to provide a TOPCon photovoltaic glass anti-dust and high-transmittance double-function coating solution preparation device for realizing the TOPCon photovoltaic glass anti-dust and high-transmittance double-function coating solution preparation process.

[0019] A centrifugal screening structure is installed on the top of the annular plate for centrifugal treatment of the suspension material.

[0020] A stirring structure is installed inside the preparation cylinder for variable frequency mixing action.

[0021] The centrifugal screening structure comprises a rotating tube, the bottom of the rotating tube is rotatably installed at the center of the cover plate, the top of the rotating tube is fixed with a conical cap, and the outer side of the conical cap is fixed with a centrifugal plate inclined upward.

[0022] A flow guide box is rotatably installed on the top outer side of the rotating tube, the end opening of the flow guide box is located below the screen hole of the centrifugal plate, the outer side of the flow guide box is provided with a slag discharge cylinder, the slag discharge cylinder is provided with an annular side incision, the incision height of the slag discharge cylinder is in contact with the top edge of the centrifugal plate, and the top inner side of the slag discharge cylinder is fixed with a protective cover.

[0023] The top side of the protective cover is fixed with a feeding port, and the bottom port of the feeding port is located directly above the conical cap.

[0024] The bottom of the flow guide box is connected with a flow guide pipe, the bottom end of the flow guide pipe is communicated with the movable cylinder body, a flow guide valve is installed on the flow guide pipe, a shunt pipe is arranged on the flow guide pipe, and an electromagnetic valve is arranged on the shunt pipe.

[0025] The top of the protective cover is provided with an air hole, the top side of the protective cover is provided with an air inlet cover, a fan is installed in the air inlet cover, a dust cover is installed at the air inlet of the fan, the air hole is located above the centrifugal plate, and wind power can be generated to realize blowing of the centrifugally screened materials and better separation.

[0026] As a further scheme of the present application, a variable frequency driving motor is installed at the top side of the feeding port, a driving gear is installed on the conveying shaft of the variable frequency driving motor, a matching gear ring is installed at the middle position of the bottom of the rotating pipe, the driving gear and the matching gear ring are mutually engaged, a support plate is fixed at the outer side of the slag discharge cylinder, a support rod is fixed between the support plate and the cover plate, and the support plate is used for supporting and fixing the slag discharge cylinder and the flow guide box.

[0027] As a further scheme of the present application, an annular plate is installed at the top side of the feeding port, an electric cylinder is fixed at the bottom side of the annular plate, a telescopic rod is installed at the telescopic end of the electric cylinder, the top end of the telescopic rod is fixed at the bottom side of the cover plate, a discharge pipe is connected at the bottom of the movable cylinder body, and a valve is installed on the discharge pipe, so that the flow of the materials can be better ensured.

[0028] As a further scheme of the present application: the stirring structure comprises a rotating seat, which is installed at the center position of the inner wall of the bottom of the movable cylinder body, a rotating rod is rotatably installed on the top side of the rotating seat, an oscillating groove is formed on the circumferential surface of the rotating rod in the vertical direction, an installation seat is fixed in the oscillating groove, an oscillating rod is swingably installed on the installation seat, an extension rod is movably inserted into the bottom of the oscillating rod, a first spring is fixed between the top end of the extension rod and the top inner wall of the oscillating rod, a counterweight column is fixed to the bottom end of the extension rod, a fixed rod is fixed to the top end of the rotating rod, a limiting plate is fixed to the outer side surface of the fixed rod, a movable cap is sleeved on the top of the fixed rod, a second spring is fixed between the top inner wall of the movable cap and the fixed rod, a limiting clamping plate is fixed to the inner wall of the movable cap and acts on the limiting plate, a matching tooth is fixed to the top side of the movable cap, a clamping groove is formed at the bottom end of the rotating tube, and the clamping groove and the matching tooth are in a matching structure; when the rotating rod rotates at different speeds, the counterweight column expands outward under the action of centrifugal force, the oscillating rod and the extension rod oscillate outward, the stirring structure can be formed in the chamber of the cylinder body, the stirring of the material can be realized, the operation can be expanded from the inside to the outside, this operation form can reduce the power consumption of the stirring structure, avoid high power consumption due to excessive resistance during direct operation of a large stirring surface, and adjust the expansion area of stirring through frequency conversion, so that the stirring effect can be better improved.

[0029] As a further scheme of the present application: the top side of the cover plate is equipped with a control box, a liquid level instrument is installed in the preparation cylinder body, the detection data of the liquid level instrument is displayed through the control box, the control box is used for frequency conversion adjustment of the frequency conversion motor and control of the electric cylinder, and the control box is used for opening of the guide valve and the valve on the discharge pipe; the liquid level in the cylinder body is detected through the liquid level instrument, the material after centrifugal filtration is discharged through the shunt pipe after reaching the standard, the control box is used for closing of the guide valve, and the accuracy of feeding is ensured.

[0030] The beneficial effects of the present application are:

[0031] The coating solution prepared by the above process cooperates with TiO2 through a surfactant, so that the surface energy of the solidified coating solution is extremely low, dust adhesion is significantly reduced, the photocatalytic properties of TiO2 nanoparticles can decompose surface organic matter, rainwater can realize self-cleaning, and the coating solution has high light transmission performance; the mass ratio of the multilayer structure of SiO2 / ZrO2 is 5:3:2, the reflectivity is reduced through interference effect, the average reflectivity is less than 3%, the coating solution is optimized through nanoparticle dispersion, designed through a multilayer structure, and precisely controlled through pH, the synergistic effect of anti-dust and high light transmission function is realized, and excellent weather resistance and construction adaptability are simultaneously achieved.

[0032] The technical scheme in the preparation process, through the heart filter purification effect, through the combination design of conical cap and centrifugal plate, the use of centrifugal force realizes the classification and separation of particulate matter, the conical centrifugal plate accelerates the diffusion of mixed liquid, realizes solid-liquid separation through filter hole, the structure of slag discharge cylinder realizes automatic collection and discharge of impurities, improves the fineness of coating liquid to micron level, reduces the influence of particulate matter on film forming quality, adopts scalable stirring structure to realize high efficiency energy utilization, frequency conversion driving control of counterweight column expands the range of centrifugal expansion, swing rod combination forms spiral stirring vortex, the expansion structure reduces the stirring resistance, the power consumption is dynamically adjusted with the stirring range, through the structural innovation realizes multi-dimensional optimization, the equipment integration degree is improved, the frequency conversion driving system reduces the comprehensive energy consumption. BRIEF DESCRIPTION OF DRAWINGS

[0033] The application will be further described below in combination with the drawings.

[0034] Figure 1 It is the first perspective three-dimensional structure schematic diagram of the preparation equipment.

[0035] Figure 2 It is the second perspective three-dimensional structure schematic diagram of the preparation equipment.

[0036] Figure 3 It is the overhead structure schematic diagram of the preparation equipment.

[0037] Figure 4 It is Figure 3 The cross-sectional structure schematic diagram along A-A in the middle.

[0038] Figure 5 It is the centrifugal screening structure schematic diagram.

[0039] Figure 6 It is the stirring structure schematic diagram.

[0040] Figure 7 It is the cross-sectional schematic diagram of the centrifugal screening structure.

[0041] Figure 8 It is the cross-sectional schematic diagram of the stirring structure.

[0042] Figure 9 It is the preparation process flow schematic diagram.

[0043] In the figure: 1, preparation cylinder, 2, movable cylinder, 3, annular plate, 4, cover plate, 5, control box, 6, telescopic rod, 7, electric cylinder, 8, discharge pipe, 10, support column, 11, slag discharge cylinder, 12, protective cover, 13, air inlet cover, 14, feed inlet, 15, dust cover, 17, slag discharge pipe, 18, support plate, 19, drive gear, 20, variable frequency drive motor, 21, support rod, 22, flow guide pipe, 23, flow guide valve, 24, rotating pipe, 25, matching tooth ring, 26, flow guide box, 27, centrifugal plate, 28, conical cap, 29, fan, 30, stirring structure, 31, clamping groove, 301, limiting plate, 302, matching tooth, 303, rotating rod, 304, fixed rod, 305, mounting seat, 306, swing groove, 307, swing rod, 308, counterweight column, 309, extension rod, 310, first spring, 311, movable cap, 312, second spring, 313, limiting clamping plate, 314, rotating seat. DETAILED DESCRIPTION

[0044] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present application.

[0045] Please refer to Figure 9 The present application is a kind of TOPCon photovoltaic glass anti-dust-high light transmittance double functional coating solution preparation process, comprising the following steps:

[0046] S1: raw material preparation, SiO2 nanoparticles, ZrO2 nanoparticles, TiO2 nanoparticles, surfactant, dispersant, buffer and organic solvent.

[0047] S2: mixing and dispersing, nanoparticle pre-dispersion: after weighing silica, zirconium dioxide and titanium dioxide nanoparticles according to the mass ratio, adding them into organic solvents respectively, using ultrasonic dispersion equipment to perform ultrasonic treatment on each kind of nanoparticle separately, ensuring that the nanoparticles are fully dispersed, mixing the dispersed nanoparticle solution to ensure uniform mixing.

[0048] S3: centrifugal filtration, centrifugal treatment is performed on the silica suspension agent, zirconium dioxide suspension agent and titanium dioxide suspension agent formed by using the preparation equipment, impurities and particulate matter in the particle solution are screened out, and complete adjustment is performed according to the volume of the prepared mixed solution.

[0049] S4: Mixing and blending, by using a preparation device, a suitable amount of dispersant is added to the mixed solution under stirring, the amount of dispersant added is 1%-3% of the total mass of nanoparticles, continue to stir to make the dispersant evenly dispersed, further improve the dispersion stability of nanoparticles. Under stirring, slowly add the environmentally friendly surfactant, continue to stir to ensure uniform distribution of the surfactant.

[0050] S5: pH adjustment, sample the mixed solution in the preparation device, use a pH meter to detect the pH value of the solution, add a suitable amount of buffer as needed to adjust the pH value, after each adjustment of the pH value, stir for 10 minutes and retest to ensure the stability of the pH value.

[0051] S6: static stabilization, after filtration, the coating solution is placed for 24 hours to remove bubbles and further stabilize the solution.

[0052] In step S1, the particle size of SiO2, ZrO2 and TiO2 nanoparticles is 10-50 nm, the purity is ≥99.5%, the surfactant is perfluoropolyether surfactant, the proportion is 0.5% of the total solution mass, the dispersant is polyethylene glycol, the buffer is phosphate buffer, and the organic solvent is a mixture of ethanol and deionized water, the ratio of ethanol to deionized water is 1:1.

[0053] In S2, the mass ratio of SiO2:ZrO2:TiO2 is 5:3:2.

[0054] In S5, the pH value of the solution is adjusted to neutral, the pH value is 6.5-7.5.

[0055] The TOPCon photovoltaic glass anti-dust and high-transmittance double-function coating solution is made by using the TOPCon photovoltaic glass anti-dust and high-transmittance double-function coating solution preparation process.

[0056] The surfactant cooperates with TiO2 to make the surface energy of the cured coating solution very low, significantly reducing dust adhesion, and the photocatalytic properties of TiO2 nanoparticles can decompose surface organic matter, rainwater can realize self-cleaning, and has high light transmittance, the dispersion uniformity of the coating solution is optimized, the average visible light transmittance after coating is >95%, which is 3-5% higher than that of uncoated glass.

[0057] The SiO2 / ZrO2 multilayer structure has a mass ratio of 5:3:2, which reduces the reflectivity through interference effect, and the average reflectivity is <3%. This coating solution realizes the synergistic effect of anti-dust and high-transmittance functions through nanoparticle dispersion optimization, multilayer structure design and precise pH control, and also has excellent weather resistance and construction adaptability.

[0058] In another embodiment, a Topcon battery is provided, comprising a TOPCon photovoltaic glass coated by a TOPCon photovoltaic glass anti-dust and high-transmittance double-function coating solution, wherein the TOPCon photovoltaic glass anti-dust and high-transmittance double-function coating solution is prepared by a TOPCon photovoltaic glass anti-dust and high-transmittance double-function coating solution preparation process.

[0059] Embodiment one

[0060] In an embodiment, a TOPCon photovoltaic glass anti-dust and high-transmittance double-function coating solution preparation device is provided, as shown in Figures 1-4 、 Figure 5 、 Figure 8 The preparation device for a TOPCon photovoltaic glass anti-dust and high-transmittance double-function coating solution preparation process comprises a preparation cylinder 1, wherein a movable cylinder 2 is slidably installed at the top port position of the preparation cylinder 1, and an annular plate 3 is fixed to the top of the movable cylinder 2.

[0061] A centrifugal screening structure is installed at the top of the annular plate 3 for centrifugal treatment of the suspension material.

[0062] A stirring structure 30 is installed inside the preparation cylinder 1, which is used for frequency conversion mixing.

[0063] The centrifugal screening structure comprises a rotating tube 24, which is rotatably installed at the center position of the cover plate 4, and a conical cap 28 is fixed to the top of the rotating tube 24, and a centrifugal plate 27 with an upwardly inclined opening is fixed to the outside of the conical cap 28.

[0064] A flow guide box 26 is rotatably installed at the top outside of the rotating tube 24, the end opening of the flow guide box 26 is located below the screen hole of the centrifugal plate 27, a slag discharge cylinder 11 is provided on the outside of the flow guide box 26, the slag discharge cylinder 11 is provided with an annular side incision, the incision height of the slag discharge cylinder 11 is in contact with the top edge of the centrifugal plate 27, and a protective cover 12 is fixed to the top inside of the slag discharge cylinder 11.

[0065] A feed inlet 14 is fixed to the top side of the protective cover 12, and the bottom port of the feed inlet 14 is located directly above the conical cap 28.

[0066] A flow guide pipe 22 is connected to the bottom of the flow guide box 26, the bottom end of the flow guide pipe 22 is in communication with the movable cylinder 2, a flow guide valve 23 is installed on the flow guide pipe 22, and a shunt pipe is provided on the flow guide pipe 22, and an electromagnetic valve is provided on the shunt pipe.

[0067] The top of the protective cover 12 is provided with an air hole, the top side of the protective cover 12 is provided with an air inlet cover 13, the air inlet cover 13 is provided with a fan 29, the air inlet of the fan 29 is provided with a dust cover 15, and the air hole is located above the centrifugal plate 27.

[0068] The top side of the feeding port 14 is provided with a variable frequency drive motor 20, the conveying shaft of the variable frequency drive motor 20 is provided with a drive gear 19, the middle position of the bottom of the rotating pipe 24 is provided with a matching gear ring 25, the drive gear 19 and the matching gear ring 25 are meshed with each other, the outer side of the slag discharge cylinder 11 is fixed with a support plate 18, and the support plate 18 and the cover plate 4 are fixed with a support rod 21. The support plate 18 is used for supporting and fixing the slag discharge cylinder 11 and the flow guide box 26.

[0069] When the mixed solution is fed, the mixed solution is fed through the feeding port 14, at the same time, the variable frequency drive motor 20 drives the drive gear 19 to rotate, under the cooperation of the matching gear ring 25, the rotating pipe 24 is driven to rotate, so that the conical cap 28 and the centrifugal plate 27 rotate synchronously. Since the conical cap 28 is a conical structure, it can disperse the liquid along the feeding port 14, quickly divide the mixed solution, and after the division, the divided mixed solution spreads outward along the upward inclined centrifugal plate 27. In the process of spreading and diffusing the mixed solution, the mixed solution falls into the flow guide box 26 through the filter hole of the centrifugal plate 27.

[0070] In order to improve the filtering efficiency, the fan 29 in the air inlet cover 13 is operated, which can convey the gas filtered through the dust cover 15 downward, blow the rotating centrifugal plate 27, and facilitate the mixed solution to pass through the filter hole downward.

[0071] Since the centrifugal plate 27 is an upwardly inclined disc structure, under the action of centrifugal force, the excess particles can move to the edge of the centrifugal plate 27 under the cooperation of the centrifugal force, and can enter the slag discharge cylinder 11 through the inner cutout of the slag discharge cylinder 11, so as to realize the discharge of the remaining waste materials.

[0072] After centrifugal filtration, the generated reasonable mixed solution is introduced into the combined cavity of the cylinder body 1 and the movable cylinder body 2 through the flow guide pipe 22. Direct feeding after mixing and centrifuging can effectively reduce the configuration steps and the loss of raw material preparation, and the operation continuity is higher. At the same time, in the process of material mixing, separate treatment of multiple materials is required, and in the configuration process, since all are chemical materials, the danger degree during operation can be reduced.

[0073] Example two

[0074] As Figure 2 , Figure 6 , Figure 7As shown, the top port outside of the preparation cylinder body 1 is provided with an annular plate 3, the bottom side of the annular plate 3 is fixedly provided with an electric cylinder 7, the telescopic end of the electric cylinder 7 is provided with a telescopic rod 6, the top end of the telescopic rod 6 is fixedly arranged on the bottom side of the cover plate 4, the bottom of the movable cylinder body 2 is connected with a discharge pipe 8, and the discharge pipe 8 is provided with a valve.

[0075] The stirring structure 30 comprises a rotating seat 314, which is arranged at the center position of the inner wall of the bottom of the movable cylinder body 2, the top side of the rotating seat 314 is rotatably provided with a rotating rod 303, the circumferential surface of the rotating rod 303 is provided with an oscillating groove 306 in the vertical direction, the inside of the oscillating groove 306 is fixedly provided with a mounting seat 305, the mounting seat 305 is swingably provided with an oscillating rod 307, the bottom of the oscillating rod 307 is movably inserted with an extension rod 309, the top end of the extension rod 309 and the top inner wall of the oscillating rod 307 are fixedly provided with a first spring 310, the bottom end of the extension rod 309 is fixedly provided with a counterweight column 308, the top end of the rotating rod 303 is fixedly provided with a fixed rod 304, the outer side of the fixed rod 304 is fixedly provided with a limiting plate 301, the top of the fixed rod 304 is sleeved with a movable cap 311, the top inner wall of the movable cap 311 and the fixed rod 304 are fixedly connected with a second spring 312, the inner wall of the movable cap 311 is fixedly provided with a limiting clamping plate 313, the limiting clamping plate 313 acts on the limiting plate 301, the top side of the movable cap 311 is fixedly provided with a matching tooth 302, the bottom end of the rotating pipe 24 is provided with a clamping groove 31, and the clamping groove 31 and the matching tooth 302 are in a matching structure.

[0076] When the coating liquid is prepared, the surfactant and other materials are supplemented through the feeding port 14, the electric cylinder 7 is operated during the mixing of the materials, and the movable cylinder body 2 can be retracted into the cylinder body 1 during the contraction movement of the telescopic rod 6.

[0077] After the movable cylinder body 2 falls downward, the bottom of the rotating pipe 24 moves downward, when the matching tooth 302 is opposite to the clamping groove 31 and is clamped in, the rotating rod 303 and the fixed rod 304 can be driven to rotate, when the variable frequency drive motor 20 drives the rotating pipe 24, the rotating rod 303 can be driven to rotate at different speeds, when the rotating rod 303 rotates at different speeds, the counterweight column 308 expands outward under the action of centrifugal force, the oscillating rod 307 and the extension rod 309 oscillate outward, the stirring structure can be formed in the chamber of the cylinder body 1, and the stirring of the materials can be realized.

[0078] The operation can be expanded from inside to outside, which can reduce the power consumption of the stirring structure, avoid high power consumption due to excessive resistance during direct operation of a large stirring surface, and adjust the expansion area of the stirring through variable frequency rotation, so that the stirring effect can be better improved.

[0079] When the matching tooth 302 does not correspond to the clamping groove 31, the bottom of the rotating pipe 24 will extrude the second spring 312, realizing the extrusion of the movable cap 311. When the matching tooth 302 does not correspond to the clamping groove 31, the rotating pipe 24 rotates, and the movable cap 311 does not follow the movement. With the rotation of the rotating pipe 24, the rotating rod 303 can be driven to rotate under the cooperation of the limiting clamping plate 313 and the limiting plate 301, realizing the stirring operation. Through the cooperation of the frequency conversion motor 20, the stirring operation can be realized. The device can realize one machine with multiple functions, improve the utilization rate of electric power equipment, reduce the loss of the device, and discharge the mixed materials after being static to complete the preparation process. Through centrifugal filtration and frequency conversion stirring, the fineness of the prepared plating solution can be ensured, and the quality of the plating solution can be improved.

[0080] The top side of the cover plate 4 is equipped with a control box 5. A liquid level instrument is installed in the inside of the preparation cylinder 1. The detection data of the liquid level instrument is displayed through the control box 5. The control box 5 is used for frequency conversion adjustment of the frequency conversion motor 20 and control of the electric cylinder 7. The control box 5 is used for opening of the valve on the flow guide valve 23 and the discharge pipe 8. The model of the liquid level instrument is FMU230. The liquid level height in the cylinder 1 can be detected through the liquid level instrument. After the material after centrifugal filtration meets the standard, the flow guide valve 23 can be closed through the control box 5. The excess material can be discharged through the shunt pipe 22, ensuring the accuracy of the feeding.

[0081] In this embodiment, after the silica, zirconium dioxide and titanium dioxide particles are dissolved in the organic solvent, a mixed solution can be formed. In the process of preparing the plating solution, the fineness and continuity of the preparation of the plating solution can be improved.

[0082] When the mixed solution is prepared, the mixed solution is fed through the feeding port 14. At the same time, the frequency conversion motor 20 drives the driving gear 19 to rotate. Under the cooperation of the matching gear ring 25, the rotating pipe 24 can be driven to rotate, so that the conical cap 28 and the centrifugal plate 27 can be driven to rotate synchronously. Since the centrifugal plate 27 is a conical structure, the liquid can be dispersed along the feeding port 14, and the mixed solution can be quickly shunted. After the shunting, the shunted mixed solution diffuses outward along the inclined upward centrifugal plate 27. In the process of shunting and diffusion of the mixed solution, the mixed solution falls into the flow guide box 26 through the filter holes of the centrifugal plate 27.

[0083] In order to improve the filtering efficiency, the fan 29 in the air inlet cover 13 can blow the gas filtered through the dust cover 15 downward, so that the mixed solution can pass through the filter holes downward.

[0084] Due to the upwardly inclined disc structure of the centrifugal plate 27, under the action of centrifugal force, the excess particles can move to the edge of the centrifugal plate 27 under the cooperation of the centrifugal force, enter the slag discharge cylinder 11 through the inner cutout of the slag discharge cylinder 11, and realize the discharge of the excess particles.

[0085] After centrifugal filtration, the generated reasonable mixture is introduced into the combined cavity of the cylinder 1 and the movable cylinder 2 through the flow guide pipe 22, and directly feeds after mixing centrifugal operation, which can effectively reduce the configuration steps, reduce the loss of raw material preparation, and has higher operation continuity. At the same time, in the material mixing process, multiple materials need to be treated separately, and in the configuration process, since they are all chemical materials, the danger degree during operation can be reduced.

[0086] When the plating solution is configured, the surfactant and other materials are supplemented through the feed inlet 14. During material mixing, the movable cylinder 2 can be retracted into the cylinder 1 through the contraction movement of the telescopic rod 6 by the operation of the electric cylinder 7.

[0087] After the movable cylinder 2 falls downward, the bottom of the rotating pipe 24 moves downward, and when the cooperating gear teeth 302 are opposite the clamping groove 31 and are clamped in, the rotating rod 303 and the fixed rod 304 can be driven to rotate. When the variable frequency driving motor 20 drives the rotating pipe 24, the rotating rod 303 can be driven to rotate at different speeds. When the rotating rod 303 rotates at different speeds, the counterweight column 308 expands outward under the action of centrifugal force, the swing rod 307 and the extension rod 309 swing outward, a stirring structure 30 can be formed in the chamber of the cylinder 1, and the stirring treatment of the material can be realized.

[0088] The operation can be expanded from the inside to the outside. This operation form can reduce the power consumption of the stirring structure 30, avoid high power consumption due to excessive resistance during direct operation of a large stirring surface, and adjust the expansion area of stirring through variable frequency rotation to better improve the stirring effect.

[0089] When the cooperating gear teeth 302 do not correspond to the clamping groove 31, the bottom of the rotating pipe 24 will be pressed against the second spring 312 to press the movable cap 311. When the cooperating gear teeth 302 are not clamped into the clamping groove 31, the rotating pipe 24 rotates, the movable cap 311 does not move with it, and as the rotating pipe 24 rotates, the rotating rod 303 can be driven to rotate under the cooperation of the limiting clamping plate 313 and the limiting plate 301 to realize stirring operation. Through the cooperation of the variable frequency driving motor 20, the stirring operation can be realized, one machine can be used for multiple purposes, the utilization rate of electrical equipment of the equipment can be improved, the loss of the equipment can be reduced, the mixed material can be discharged after being static, the preparation process can be completed, and the fineness of the prepared plating solution can be ensured through centrifugal filtration and variable frequency stirring to improve the quality of the plating solution.

[0090] The above has been described in detail one embodiment of the present application, but the content is only the preferred embodiment of the present application, cannot be considered for limiting the scope of the present application. Any equivalent changes and improvements made in the scope of the present application, should still belong to the scope of the present application.

Claims

1. A TOPCon photovoltaic glass anti-dust and high-transmittance dual-function coating solution preparation process, characterized in that, It comprises the following steps: S1: Prepare SiO2 nanoparticles, ZrO2 nanoparticles, TiO2 nanoparticles, surfactants, dispersants, buffers and organic solvents; S2: After weighing the silica, zirconia and titanium dioxide nanoparticles according to the mass ratio, add them into the organic solvent, disperse them into nanoparticles first and then mix them; S3: The mixed solution obtained in step S2 is centrifuged by using a preparation device, and the volume of the prepared mixed solution is adjusted completely; S4: In a stirring state, a dispersant is added to the mixed solution obtained in step 3, the amount of the dispersant is 1%-3% of the total mass of the nanoparticles, and the stirring is continued; In a stirring state, an environmentally friendly surfactant is slowly added, and the stirring is continued; S5: Sample the mixed solution in the preparation device, use a pH meter to detect the pH value of the solution, and add a buffer as needed to adjust the pH value; S6: The mixed solution after filtration and meeting the PH value is placed to obtain a TOPCon photovoltaic glass anti-dust-high light transmittance double functional coating solution.

2. The anti-dust and high-transmittance bifunctional coating solution preparation process for TOPCon photovoltaic glass according to claim 1, characterized in that, In step S1, the particle size of SiO2 nanoparticles, ZrO2 nanoparticles and TiO2 nanoparticles is 10-50 nm, the purity is ≥99.5%, the surfactant is a perfluoropolyether surfactant, the proportion is 0.5% of the total solution mass, the dispersant is polyethylene glycol, the buffer is phosphate buffer, and the organic solvent is a mixed solvent of ethanol and deionized water, the ratio of ethanol to deionized water is 1:

1.

3. The anti-dust and high-transmittance bifunctional coating solution preparation process for TOPCon photovoltaic glass according to claim 2, characterized in that, In the S2, the mass ratio of SiO2:ZrO2:TiO2 is 5:3:

2.

4. The dual function of anti-dust and high transmittance coating solution for TOPCon photovoltaic glass according to claim 2, characterized in that, In the S5, the pH value of the solution is adjusted to neutral, and the pH value is 6.5-7.

5.

5. A TOPCon photovoltaic cell, characterized in that It comprises a TOPCon photovoltaic glass, which is coated by a TOPCon photovoltaic glass anti-dust-high light transmittance double functional coating solution, and the TOPCon photovoltaic glass anti-dust-high light transmittance double functional coating solution is prepared by the preparation process of the TOPCon photovoltaic glass anti-dust-high light transmittance double functional coating solution according to any one of claims 1-4.

6. A preparation device based on the preparation process of the TOPCon photovoltaic glass anti-dust-high-transmittance dual-function coating solution of claim 1, characterized in that, It comprises a preparation cylinder (1), an active cylinder (2) is slidably installed at the top port position of the preparation cylinder (1), and a ring plate (3) is fixed to the top of the active cylinder (2); A centrifugal screening structure is installed at the top of the ring plate (3) for centrifugal treatment of suspended mixed materials; A stirring structure (30) is installed in the inside of the preparation cylinder (1), and the stirring structure (30) is used for frequency conversion mixing; The centrifugal screening structure comprises a rotating tube (24), the bottom of the rotating tube (24) is rotatably installed at the center position of the cover plate (4), the top of the rotating tube (24) is fixed with a conical cap (28), and the outer side of the conical cap (28) is fixed with a centrifugal plate (27) inclined upward; The top outer side of the rotating pipe (24) is rotatably installed with a flow guide box (26), the end opening of the flow guide box (26) is located below the screen hole of the centrifugal plate (27), the outer side of the flow guide box (26) is provided with a slag discharge cylinder (11), the slag discharge cylinder (11) is provided with an annular side incision, the incision height of the slag discharge cylinder (11) is in contact with the top edge of the centrifugal plate (27), and the top inner side of the slag discharge cylinder (11) is fixedly provided with a protective cover (12); The top side of the protective cover (12) is fixedly provided with a feed inlet (14), and the bottom port of the feed inlet (14) is located directly above the conical cap (28); The bottom of the flow guide box (26) is connected with a flow guide pipe (22), the bottom end of the flow guide pipe (22) is communicated with the movable cylinder body (2), the flow guide pipe (22) is installed with a flow guide valve (23), and the flow guide pipe (22) is provided with a shunt pipe and an electromagnetic valve; The top of the protective cover (12) is provided with an air hole, the top side of the protective cover (12) is installed with an air inlet cover (13), the air inlet cover (13) is installed with a fan (29), the air inlet of the fan (29) is installed with a dust cover (15), and the air hole is located above the centrifugal plate (27).

7. The dispensing apparatus of claim 6, wherein, The top side of the feed inlet (14) is installed with a variable frequency drive motor (20), the conveying shaft of the variable frequency drive motor (20) is installed with a drive gear (19), the bottom middle position of the rotating pipe (24) is installed with a matching gear ring (25), the drive gear (19) and the matching gear ring (25) are meshed with each other, the outer side of the slag discharge cylinder (11) is fixedly provided with a support plate (18), the support plate (18) and the cover plate (4) are fixedly provided with a support rod (21), the support plate (18) is used for supporting and fixing the slag discharge cylinder (11) and the flow guide box (26), and the cover plate (4) is provided with a feed inlet.

8. The dispensing apparatus of claim 7, wherein, The top port of the preparation cylinder body (1) is installed with an annular plate (3), the bottom side of the annular plate (3) is fixedly provided with an electric cylinder (7), the telescopic end of the electric cylinder (7) is installed with a telescopic rod (6), the top end of the telescopic rod (6) is fixedly provided on the bottom side of the cover plate (4), the bottom of the movable cylinder body (2) is connected with a discharge pipe (8), and the discharge pipe (8) is installed with a valve.

9. The dispensing apparatus of claim 8, wherein, Said stirring structure (30) includes a rotating seat (314) installed at the center position of the bottom inner wall of the movable cylinder body (2), a rotating rod (303) is rotatably installed on the top side of the rotating seat (314), swing grooves (306) are vertically formed in the circumferential surface of the rotating rod (303), mounting seats (305) are fixedly arranged in the swing grooves (306), swing rods (307) are swingably installed on the mounting seats (305), extension rods (309) are movably inserted into the bottom of the swing rods (307), first springs (310) are fixed between the top end of the extension rods (309) and the top inner wall of the swing rods (307), counterweight columns (308) are fixed to the bottom end of the extension rods (309), a fixing rod (304) is fixed to the top end of the rotating rod (303), a limiting plate (301) is fixed to the outer side surface of the fixing rod (304), a movable cap (311) is sleeved on the top of the fixing rod (304), a second spring (312) is fixed between the top inner wall of the movable cap (311) and the fixing rod (304), a limiting clamping plate (313) is fixed to the inner wall of the movable cap (311) and acts on the limiting plate (301), cooperating teeth (302) are fixed to the top side of the movable cap (311), a clamping groove (31) is formed in the bottom end of the rotating pipe (24), and the clamping groove (31) and the cooperating teeth (302) are in matching structure.

10. The dispensing apparatus of claim 9, wherein, The top side of the cover plate (4) is provided with a control box (5), a liquid level instrument is installed in the inside of the preparation cylinder body (1), the detection data of the liquid level instrument is displayed through the control box (5), the control box (5) is used for frequency conversion adjustment of the frequency conversion driving motor (20) and control of the electric cylinder (7), and the control box (5) is used for opening of the valves on the flow guide valve (23) and the discharge pipe (8).

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