A glass cleaning method for reducing the risk of cell piece hidden crack

Abstract

The application discloses a kind of glass cleaning methods for reducing the risk of battery piece hidden crack, it is related to solar cell production technical field.The cleaning method mainly includes the following steps: S1, dust removal;S2, pickling;S3, alkali washing;S4, repair;S5, drying;Mainly for the dust, bird droppings, acid salt crystallization and basic salt crystallization of cleaning glass surface cement, and repair the etch pit existing in glass surface, finally form self-cleaning layer on glass surface;The application divides the cleaning step into two parts, one is to clean the dirt and dust on the surface of the battery panel glass, the second step is to repair the damage caused by the environment or the marine environment erosion on the surface of the battery panel glass, to prevent the environment from eroding the internal battery panel after the glass is damaged, to reduce the risk of hidden crack problem of battery panel, and to avoid pressing the battery panel during cleaning, thereby preventing the hidden crack problem caused by uneven pressure on the surface of the battery panel.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of solar cell production, in particular to a glass cleaning method for reducing the risk of hidden cracks of a cell piece. BACKGROUND

[0002] As one of the most potential clean energy in the world, solar energy is suitable for island facilities, offshore platforms, ocean vessels and other equipment which are in independent working state for a long time in marine environment. Solar photovoltaic is not only used in single equipment such as marine structures and marine vehicles, but also widely tried in large photovoltaic arrays on artificial floating platforms in islands or offshore.

[0003] When solar photovoltaic is used in marine environment, the harsh environmental factors must be fully considered. Marine environment is much more complex than land environment. Since the glass surface of solar cell directly contacts with marine environment, and its spectral transmittance restricts the photoelectric conversion efficiency of solar cell, it can be considered that the glass surface is the main influencing part.

[0004] The comprehensive effect of marine environmental factors will reduce the solar irradiance intensity transmitted into the solar cell through the shielding effect of the glass surface, and will also exacerbate the corrosion and wear of the solar cell, especially its glass surface, thereby reducing its reliability and affecting the power output characteristics. Therefore, it is very important to reasonably clean and slow down the damage of the glass surface of solar cell.

[0005] At present, a solar cell panel cleaning method and device are disclosed in Chinese patent CN106301192A, which includes the following steps: breaking the fixed objects such as bird droppings or snow, brushing the floating dust to the outside of the photovoltaic panel frame, spraying the wet photovoltaic panel, and scraping the remaining dust to the ground.

[0006] The cleaning device is a device that moves forward or backward to clean the solar cell panel by crawling on the photovoltaic array with external force or self-moving mechanism. The feature is that at least one side of the frame is equipped with a comb-shaped breaking scraper with the same length as the module, a closed loop brush string with the same length as the module, and a closed loop scraper string with the same length as the module. A line-shaped spraying belt is arranged between the brush string and the scraper string, and the spraying water is provided by a hose connected with a vehicle compression pump or a hand-held tap water pipe.

[0007] This kind of cleaning method and device mainly replaces manual cleaning of the glass surface of solar cell panel, and the cleaning efficiency is 30-40 times that of manual cleaning. However, when using this method and device for cleaning, due to the uneven pressure on the surface of solar cell panel and the influence of marine environmental factors, hidden cracks are prone to occur in the solar cell panel, which causes a sharp decrease in the power of solar panel, and even internal short circuit and fire. SUMMARY

[0008] The present application aims at the above technical problems, overcomes the defects of the prior art, and provides a glass cleaning method for reducing the risk of hidden cracks of battery pieces.

[0009] To solve the above technical problems, the present application provides a glass cleaning method for reducing the risk of hidden cracks of battery pieces.

[0010] Technical effects: The cleaning steps are divided into two parts, one of which is to clean the dirt and dust on the surface of the battery panel glass, and the second step is to repair the damage caused by the environment or the erosion of the marine environment on the surface of the battery panel glass, prevent the environment from eroding the internal battery panel after the glass is damaged, reduce the risk of hidden crack problems of the battery panel, and avoid pressing the battery panel during cleaning, thereby preventing the hidden crack problem caused by uneven pressure on the surface of the battery panel.

[0011] The further defined technical solution of the present application is: a glass cleaning method for reducing the risk of hidden cracks of battery pieces, comprising the following steps:

[0012] S1, dust removal, using a rolling dust brush strip to reciprocally clean the glass surface, removing the dust or bird droppings adhered to the glass surface;

[0013] S2, acid washing, using a spray belt formed by a plurality of nozzles arranged in a straight line to spray acid cleaning liquid onto the glass surface, after standing for 3-5 min, using a brush strip to reciprocally clean the glass surface, removing the alkaline salt crystals adhered to the glass surface, and then uniformly spraying neutral water onto the glass surface through the nozzles to clean the residues;

[0014] S3, alkali washing, spraying alkaline cleaning liquid onto the glass surface through the spray belt, after standing for 3-5 min, using a brush strip to reciprocally clean the glass surface, removing the acid salt crystals adhered to the glass surface, and then uniformly spraying neutral water onto the glass surface through the nozzles to clean the residues;

[0015] S4, repair, wiping off the water on the glass surface, uniformly spraying self-cleaning glass repair liquid onto the glass surface through the spray belt, and then uniformly wiping the self-cleaning glass repair liquid through the brush strip;

[0016] S5, drying, raising the temperature of the glass surface to 60℃ through ultraviolet heating for 3 min, for curing the self-cleaning glass repair liquid to form a self-cleaning layer.

[0017] Further, the acid cleaning liquid is composed of the following weight components:

[0018]

[0019] The above-mentioned glass cleaning method for reducing the risk of hidden cracks of battery pieces, the alkaline cleaning liquid is composed of the following weight components:

[0020]

[0021] The glass cleaning method for reducing the risk of hidden cracks of battery pieces as described above, the self-cleaning glass repair liquid is composed of the following weight component substances:

[0022]

[0023] The glass cleaning method for reducing the risk of hidden cracks of battery pieces as described above, the solvent is alcohol, the complexing agent is a phosphate complexing agent or an amino carboxylate complexing agent or a hydroxyl carboxylate complexing agent or an organic phosphate complexing agent or a polyacrylic acid complexing agent, the surfactant is stearic acid or sodium dodecyl benzene sulfonate or quaternary ammonium compound, the corrosion inhibitor is chromate or nitrite or phosphonic acid or phosphonic carboxylic acid, and the inorganic acid is one or more of hydrochloric acid or boric acid or sulfamic acid or phosphoric acid or hydroxyacetic acid or citric acid.

[0024] The glass cleaning method for reducing the risk of hidden cracks of battery pieces as described above, the solvent is alcohol, and the alkaline auxiliary agent is sodium tetraborate or sodium silicate or sodium carbonate or sodium phosphate.

[0025] The beneficial effects of the present application are:

[0026] (1) In the present application, during the cleaning process, first, the battery piece glass needs to be dusted, and the glass surface is brushed to remove most of the solid stains such as dust and bird droppings adhered to the glass, preparing for the following cleaning; secondly, the glass surface is pickled, and the acidic cleaning liquid is sprayed on the glass surface, which can clean the alkaline salt crystals on the glass surface during the standing period, and then the glass surface is washed with water to remove the alkaline salt crystals; then the glass surface is alkali washed, the alkaline cleaning liquid is sprayed, on one hand, the weak alkaline of the alkaline cleaning liquid can remove the acid salt crystals adhered to the glass surface, on the other hand, the strong cleaning ability of the alkaline cleaning liquid can also remove other stains on the glass surface, ensuring the cleaning effect of the glass, and then the glass surface is washed with water, thereby realizing a complete cleaning process; then the self-cleaning glass repair liquid is sprayed on the glass surface, which can fill the etch pits caused by environmental erosion of the glass surface, complete the repair of the glass surface, and finally form a self-cleaning layer on the glass surface through ultraviolet heating, improve the self-cleaning effect of the glass, and prolong the service life of the glass;

[0027] (2) In the present application, since the cleaning method cleans the glass multiple times, only the cleaning liquid or repair liquid needs to be sprayed and evenly applied or washed, which will not generate pressure on the glass, thereby avoiding the problem of hidden cracks caused by uneven pressure on the battery panel, while ensuring the cleaning effect and improving the cleanliness and service life of the battery panel glass;

[0028] (3) In the present application, the polyimide is an excellent organic polymer material, which can solidify in the etch pits of the glass and repair the corresponding etch pits under the coordination of alkyl alcohol amide and phenyl trimethoxysilane, thereby ensuring the light transmission performance of the glass after repair; and the nano titanium dioxide and fluorocarbon resin can form a self-cleaning layer on the surface of the glass, thereby prolonging the service life of the glass.

[0029] (4) In the present application, the cleaning step is divided into two parts, one of which is to clean the dirt and dust existing on the surface of the battery plate glass, and the second step is to repair the damage caused by the environment or the marine environment to the surface of the battery plate glass, thereby preventing the environment from eroding the internal battery plate after the glass is damaged, reducing the risk of hidden cracks of the battery plate, and avoiding pressing the battery plate during cleaning, thereby preventing the hidden crack problem caused by uneven pressure on the surface of the battery plate. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical scheme and advantages of the present application clearer, specific embodiments will be described in detail below. In the following description, a large number of specific details are set forth in order to facilitate a thorough understanding of the present application. However, the present application can be implemented in many different ways other than those described herein, and those skilled in the art can make similar improvements without departing from the scope of the present application, so the present application is not limited to the specific implementation disclosed below.

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0032] The glass cleaning method for reducing the risk of hidden cracks of battery pieces provided by the embodiment comprises the following steps:

[0033] S1, dust removal, using a rolling dust brush strip to reciprocally clean the glass surface, removing the dust or bird droppings adhered to the glass surface.

[0034] S2, acid washing, using a spray belt formed by a plurality of spray heads arranged in a straight line to spray acid cleaning liquid onto the glass surface, after standing for 3-5 min, using a brush strip to reciprocally clean the glass surface, removing the alkaline salt crystals adhered to the glass surface, and then uniformly spraying neutral water onto the glass surface through the spray head to clean the residues.

[0035] In this step, the acid cleaning liquid is composed of the following weight components:

[0036]

[0037]

[0038] The solvent is alcohol, the complexing agent is phosphate complexing agent or aminocarboxylate complexing agent or hydroxycarboxylate complexing agent or organic phosphate complexing agent or polyacrylic complexing agent, the surfactant is stearic acid or sodium dodecylbenzenesulfonate or quaternary ammonium compound, the corrosion inhibitor is chromate or nitrite or phosphonic acid or phosphonocarboxylic acid, and the inorganic acid is one or more of hydrochloric acid, boric acid, aminosulfonic acid, phosphoric acid, and hydroxyacetic acid.

[0039] The acidic auxiliary agent can make the cleaner as a whole weakly acidic, dissolve metal oxides, and form a phosphoric acid iron covering film on the surface of iron, thereby preventing surface corrosion.

[0040] S3, alkaline cleaning, spraying alkaline cleaning solution to the glass surface through a spray bar, standing for 3-5 min, and then brushing the glass surface back and forth using a brush strip to remove the acid salt crystals adhered to the glass surface, and then spraying neutral water to the glass surface through a nozzle to clean the remaining residues;

[0041] In this step, the alkaline cleaning solution is composed of the following weight components:

[0042]

[0043] The solvent is alcohol, and the alkaline auxiliary agent is sodium tetraborate, sodium silicate, sodium carbonate, or sodium phosphate.

[0044] The alkaline auxiliary agent can enhance the alkalinity of the alkaline cleaning solution, making it weakly alkaline, and can also neutralize the acid dirt to make it hydrophilic, thereby facilitating cleaning.

[0045] S4, repairing, drying the water on the glass surface, uniformly spraying self-cleaning glass repair liquid to the glass surface through a spray bar, and then evenly spreading the self-cleaning glass repair liquid using a brush strip;

[0046] In this step, the self-cleaning glass repair liquid is composed of the following weight components:

[0047]

[0048] The titanium dioxide film has superhydrophilicity and superpermanence under light, and the fluorocarbon resin can form a dense coating film at the bottom of the coating, further improving the self-cleaning function of the glass.

[0049] S5, drying, raising the temperature of the glass surface to 60℃ through ultraviolet heating for 3 min to solidify the self-cleaning glass repair liquid and form a self-cleaning layer.

[0050] Specific implementation process: during the cleaning process, the battery piece glass first needs to be dusted, and the glass surface is brushed using a brush strip to remove most of the dust and bird droppings and other solid stains adhered to the glass, preparing for the subsequent cleaning;

[0051] Secondly, the glass surface is pickled, and the acidic cleaning liquid is sprayed on the glass surface, so that the acidic cleaning liquid can clean the alkaline salt crystals on the glass surface during the standing period, and then the alkaline salt crystals on the glass surface are removed by water washing;

[0052] Then the glass surface is alkali washed, the alkaline cleaning liquid is sprayed, on the one hand, the weak alkaline cleaning liquid can remove the acid salt crystals adhered to the glass surface, on the other hand, the cleaning ability of the alkaline cleaning liquid is strong, and other stains on the glass surface can also be removed, so as to ensure the cleaning effect of the glass, and then the glass is washed by water, so as to realize the complete cleaning process;

[0053] Then the glass surface is sprayed with a self-cleaning glass repair liquid, the repair liquid can fill the etch pits caused by environmental erosion on the glass surface, complete the repair of the glass surface, and finally form a self-cleaning layer on the glass surface by ultraviolet heating, improve the self-cleaning effect of the glass, and prolong the service life of the glass.

[0054] The cleaning effect of the solar tempered glass under the marine environmental condition erosion is also tested, and a comparative example is provided. The test standard is GB9963-88 solar tempered glass, the test condition is that the square tempered glass with a thickness of 3.2mm and a size of 100mm*100mm is used, and the same place is used for natural erosion for 60 days under the marine environmental condition, and the cleaning method disclosed in the application is compared with the ordinary cleaning method, and the test results are shown in Table 1.

[0055] Table 1 Performance table of tempered glass after cleaning by different cleaning methods

[0056] Item Number of etch pits Visible light transmittance (%) Wind pressure resistance Mpa Example 1 0 93.2 2600 Comparative Example 1 12 90.5 2450

[0057] As shown in Table 1, the visible light transmittance and wind pressure resistance of the tempered glass cleaned by the application are higher than those of the ordinary cleaning method, and the etch pits can be completely filled, so as to ensure the use effect of the battery panel glass.

[0058] In addition to the above embodiments, the application can also have other implementation manners. Any technical solution formed by equivalent replacement or equivalent transformation falls within the protection scope of the application.

Claims

1. A glass cleaning method for reducing the risk of microcracks in battery cells, characterized in that, Includes the following steps: S1, Dust Removal: Use a rolling dust brush to repeatedly brush the glass surface to remove dust or bird droppings stuck to the glass surface. S2, pickling: Acidic cleaning solution is sprayed onto the glass surface using a spray belt formed by several nozzles arranged in a straight line. After standing for 3 to 5 minutes, the glass surface is scrubbed repeatedly with a brush to remove the alkaline salt crystals that adhere to the glass surface. Then, neutral water is sprayed evenly onto the glass surface through the nozzle to clean the residue. S3, alkaline cleaning: spray alkaline cleaning solution onto the glass surface through a spray belt, let it stand for 3-5 minutes, then use a brush to repeatedly scrub the glass surface to remove the acidic salt crystals that adhere to the glass surface, and then spray neutral water evenly onto the glass surface through a nozzle to clean the residue. S4, Repair: Wipe the glass surface dry, spray the self-cleaning glass repair liquid evenly onto the glass surface using a spray belt, and then spread the self-cleaning glass repair liquid evenly using a brush strip; S5, Drying, the glass surface temperature is raised to 60°C by ultraviolet heating for 3 minutes to cure the self-cleaning glass repair liquid and form a self-cleaning layer; The self-cleaning glass repair fluid is composed of the following components by weight: 20-30 parts of nano titanium dioxide 20-30 parts of fluorocarbon resin 5-8 parts of polyimide 4-5 parts of alkylolamide 1-2 parts potassium carbonate 1-2 parts of phenyltrimethoxysilane.

2. The glass cleaning method for reducing the risk of microcracks in battery cells according to claim 1, characterized in that, The acidic cleaning solution is composed of the following components by weight: 30-45 parts of solvent Complexing agent 0.5-1 part Surfactant 0.5-0.8 parts 15-20 parts of inorganic acid 3-4 parts corrosion inhibitor 50-80 parts water.

3. The glass cleaning method for reducing the risk of microcracks in battery cells according to claim 1, characterized in that: The alkaline cleaning solution is composed of the following components by weight: 35-50 parts of solvent Triethanolamine 0.8–2 parts Alkaline lipase 0.2–0.5 parts 10-15 parts of alkaline additive 1-2 parts of surfactant 40-50 parts water.

4. The glass cleaning method for reducing the risk of microcracks in battery cells according to claim 2, characterized in that: The solvent is alcohol, the complexing agent is a phosphate complexing agent, an aminocarboxylic acid complexing agent, a hydroxycarboxylic acid complexing agent, an organophosphate complexing agent, or a polyacrylic acid complexing agent, the surfactant is stearic acid, sodium dodecylbenzenesulfonate, or a quaternary ammonium compound, the corrosion inhibitor is chromate, nitrite, phosphonic acid, or phosphonic acid, and the inorganic acid is one or more of hydrochloric acid, boric acid, aminosulfonic acid, phosphoric acid, glycolic acid, or citric acid.

5. A glass cleaning method for reducing the risk of microcracks in battery cells according to claim 3, characterized in that: The solvent is alcohol, and the alkaline additive is sodium tetraborate, sodium silicate, sodium carbonate, or sodium phosphate.

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