Preparation method of photovoltaic module

Abstract

The invention relates to the technical field of photovoltaic module installation, in particular to a framing method of a photovoltaic module and a preparation method of the photovoltaic module. The framing method of the photovoltaic module provided by the invention comprises the following steps: coating a non-preset glue coating area of a photovoltaic frame with a surface energy reducing agent, and preparing a pretreated photovoltaic frame after the surface energy reducing agent forms a protective layer; and bonding the preset glue coating area of the pretreated photovoltaic frame with a laminated piece through an adhesive, and carrying out framing treatment. According to the framing method, the residual adhesive layer of the photovoltaic frame can be effectively removed, manpower and material resources for removing the residual adhesive layer are reduced, and the adhesive removing efficiency is improved.

Description

Technical Field

[0001] The present application relates to the field of photovoltaic technology, and in particular to a method for preparing a photovoltaic module. Background Art

[0002] Photovoltaic modules are used to convert solar energy into electrical energy. Since they use renewable sunlight and do not cause environmental pollution during the power generation process, they are a green and environmentally friendly way of energy production. Currently, photovoltaic power generation has received widespread attention from countries around the world and has developed into an emerging industry.

[0003] Photovoltaic modules include laminates and photovoltaic frames. Laminates include photovoltaic cells. Photovoltaic cells are used to convert solar energy into electrical energy. Photovoltaic frames are installed at the edge of laminates to protect and support photovoltaic laminates. During the packaging process of photovoltaic modules, a large amount of adhesive is applied to the bonding point to ensure that the photovoltaic frame and the laminate are fully bonded. In this case, during the packaging process, excess adhesive will overflow; the residual adhesive layer after curing has the disadvantages of affecting the appearance, being difficult to remove, and affecting the production progress. In addition, the residual adhesive layer on the surface exposed to sunlight and rain for a long time may gradually age and decompose, produce harmful substances, and cause corrosion or damage to other parts of the photovoltaic module, thereby shortening the service life of the module. Summary of the invention

[0004] Based on this, it is necessary to provide a method for preparing a photovoltaic module to address the problem that the residual adhesive layer is difficult to remove.

[0005] The method for preparing a photovoltaic module provided in the present application comprises the following steps:

[0006] Coating a surface energy reducing agent on a non-preset adhesive coating area of ​​a photovoltaic frame, so that the surface energy reducing agent forms a protective layer, thereby preparing a pretreated photovoltaic frame;

[0007] The preset adhesive-coated area of ​​the pre-processed photovoltaic frame and the laminate are bonded by adhesive to perform framing.

[0008] In one embodiment, the surface energy reducing agent includes one or more of fatty acid, paraffin, glycerin, vaseline, silicone oil, polyethylene glycol and low molecular weight polyethylene;

[0009] Wherein, the number average molecular weight of the low molecular weight polyethylene is 1000-5000.

[0010] In one embodiment, the material of the photovoltaic frame includes one or more of metal materials and resin materials.

[0011] In one of the embodiments, the coating thickness of the surface energy reducing agent on the non-preset adhesive coating area of ​​the photovoltaic frame is 0.8 mm to 2 mm.

[0012] In one embodiment, the photovoltaic frame is provided with an installation groove for installing the laminate, and the specific step of coating the surface energy reducer on the non-preset adhesive coating area of ​​the photovoltaic frame includes: coating the surface energy reducer on the outer side of the installation groove of the photovoltaic frame.

[0013] In one embodiment, the installation groove is formed by enclosing a first clamping portion, a supporting portion, and a second clamping portion, the first clamping portion includes a bent portion bent toward the second clamping portion, and a pattern groove is further provided on a side of the first clamping portion away from the second clamping portion; the outer side surface of the installation groove is a side of the first clamping portion away from the second clamping portion;

[0014] The specific step of coating the surface energy reducing agent on the outer side of the installation groove of the photovoltaic frame includes: coating the surface energy reducing agent on a side of the first clamping portion away from the second clamping portion.

[0015] In one embodiment, the process parameters for coating the surface energy reducing agent on the side of the first clamping portion away from the second clamping portion include: the coating length of the surface energy reducing agent on the surface of the side of the first clamping portion away from the second clamping portion is 10 mm to 20 mm.

[0016] In one embodiment, the specific step of bonding the preset adhesive coating area of ​​the pre-processed photovoltaic frame and the laminate by adhesive includes: filling adhesive between the support portion of the pre-processed photovoltaic frame and the laminate to bond the pre-processed photovoltaic frame and the laminate.

[0017] In one embodiment, after the step of bonding the preset adhesive-coated area of ​​the pre-processed photovoltaic frame and the laminate by adhesive and performing the framing process, the step further includes:

[0018] The adhesive and the protective layer in the non-preset adhesive coating area are removed.

[0019] In one of the embodiments, the adhesive and the protective layer in the non-preset adhesive coating area are removed by one or more of organic solvent scrubbing and physical peeling.

[0020] The beneficial effects of this application are as follows:

[0021] The present application first applies a surface energy reducer on the non-preset adhesive coating area of ​​the photovoltaic module, which can form a protective layer; further, the preset adhesive coating area of ​​the pre-treated photovoltaic frame and the laminate are bonded by an adhesive. At this time, due to the reduction in the surface energy of the non-preset adhesive coating area, it is more difficult for the adhesive to adhere; at this time, excess adhesive is attached to the surface of the protective layer. Due to the presence of the protective layer, the residual adhesive layer formed after the adhesive is cured is also easier to remove.

[0022] Therefore, the framing method provided by the present application can effectively remove the residual glue layer of the photovoltaic frame, reduce the manpower and material resources for removing the residual glue layer, and improve the efficiency of glue removal. In addition, since the framing method of the present application can reduce the residual glue layer, during the application of the photovoltaic module, it can also avoid the aging and decomposition of the residual glue layer on the surface due to long-term exposure to sunlight and rain, so as to reduce the corrosion or damage caused by the residual glue layer to other parts of the photovoltaic module, and extend the service life of the photovoltaic module. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 This is a schematic structural diagram of a photovoltaic frame according to an example of the present application.

[0025] In the figure, 10 is a mounting groove; 20 is a support frame; 101 is a first clamping portion; 102 is a support portion; 103 is a second clamping portion; 101a is a bending portion; A is a non-preset glue coating area. DETAILED DESCRIPTION

[0026] The following is a further complete and clear description of the preparation method of the photovoltaic module of the present application in conjunction with specific examples. The present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present application more thorough and comprehensive.

[0027] It should be understood that the terms described in this application are only for describing specific embodiments and are not intended to limit this application. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present application. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0028] Unless otherwise indicated, all technical and scientific terms used herein have the same meanings as those generally understood by those skilled in the art in the field described in the present application. Although the present application only describes preferred methods and materials, any methods and materials similar or equivalent to those described herein may also be used in the implementation or testing of the present application. All documents mentioned in this specification are incorporated by reference to disclose and describe the methods and / or materials related to the documents. In the event of any conflict with any incorporated document, the content of this specification shall prevail.

[0029] As used herein, "one or more" refers to any one, any two, or any two or more of the listed items.

[0030] In this application, "first aspect", "second aspect", "third aspect", "fourth aspect", "fifth aspect", etc. are used only for descriptive purposes and cannot be understood as indicating or implying relative importance or quantity, nor can they be understood as implicitly indicating the importance or quantity of the indicated technical features. Moreover, "first", "second", "third", "fourth", "fifth", etc. only serve the purpose of non-exhaustive enumeration and description, and it should be understood that they do not constitute a closed limitation on quantity.

[0031] In the present application, the technical features described in an open manner include closed technical solutions composed of the listed features, and also include open technical solutions containing the listed features.

[0032] In addition, for the numerical ranges in this application, it is understood that each intermediate value between the upper and lower limits of the range is also specifically disclosed. Each smaller range between any stated value or intermediate value in the stated range and any other stated value or intermediate value in the stated range is also included in this application. The upper and lower limits of these smaller ranges can be independently included or excluded in the range. In other words, unless otherwise indicated, all ranges disclosed herein are understood to include any and all subranges included therein.

[0033] The percentage contents involved in this application, unless otherwise specified, refer to mass percentage for solid-liquid mixing and solid-solid mixing, and refer to volume percentage for liquid-liquid mixing.

[0034] The percentage concentrations mentioned in this application, unless otherwise specified, refer to the final concentration, which refers to the percentage of the added component in the system after the addition of the component.

[0035] The temperature parameters in this application, unless otherwise specified, allow for both constant temperature treatment and treatment within a certain temperature range. The constant temperature treatment allows the temperature to fluctuate within the accuracy range of instrument control.

[0036] The photovoltaic module framing method provided in the present application comprises the following steps:

[0037] Coating a surface energy reducing agent on a non-preset adhesive coating area of ​​a photovoltaic frame, so that the surface energy reducing agent forms a protective layer, thereby preparing a pretreated photovoltaic frame;

[0038] The preset adhesive-coated area of ​​the pre-processed photovoltaic frame and the laminate are bonded by adhesive to perform framing.

[0039] The present application first applies a surface energy reducing agent that can reduce the surface energy of the photovoltaic frame material on the non-preset adhesive coating area of ​​the photovoltaic module, which can form a protective layer; further, the pretreated photovoltaic frame and the laminate are bonded by an adhesive. At this time, due to the reduction in the surface energy of the non-preset adhesive coating area, it is more difficult for the adhesive to adhere; at this time, excess adhesive is attached to the surface of the protective layer. Due to the presence of the protective layer, the residual adhesive layer formed after the adhesive is cured is also easier to remove.

[0040] Therefore, the framing method provided by the present application can effectively remove the residual glue layer of the photovoltaic frame, reduce the manpower and material resources for removing the residual glue layer, and improve the efficiency of glue removal. In addition, since the framing method of the present application can reduce the residual glue layer, during the application of the photovoltaic module, it can also avoid the aging and decomposition of the residual glue layer on the surface due to long-term exposure to sunlight and rain, so as to reduce the corrosion or damage caused by the residual glue layer to other parts of the photovoltaic module, and extend the service life of the photovoltaic module.

[0041] In one example, the surface energy reducing agent includes one or more of fatty acid, paraffin, glycerin, petrolatum, silicone oil, polyethylene glycol and low molecular weight polyethylene;

[0042] Wherein, the number average molecular weight of the low molecular weight polyethylene is 1000-5000.

[0043] The surface energy reducer includes a solid surface energy reducer and a liquid surface energy reducer. It is understandable that the coating method can be selected accordingly according to the existence form of the surface energy reducer in this application. Among them, the solid surface energy reducer includes one or more of fatty acids, paraffin and vaseline. The liquid surface energy reducer includes one or more of fatty acids, paraffin, glycerol and low molecular weight polyethylene. In polyethylene glycol, high molecular weight polyethylene glycol is solid, and medium and low molecular weight polyethylene glycol is liquid. In addition, the solid surface energy reducer and deionized water can also be mixed in a mass ratio of 1: (0.8~1.2) to prepare a liquid surface energy reducer.

[0044] In one example, the material of the photovoltaic frame includes one or more of a metal material and a resin material. For example, the metal material includes but is not limited to aluminum alloy and stainless steel. The resin material includes but is not limited to polypropylene and polycarbonate.

[0045] Based on rich experience and a large number of experiments, the inventors of this application found that the synergistic performance between the materials of the above-mentioned photovoltaic frame and the surface energy reducer is good, so that the addition of the surface energy reducer can effectively reduce the bonding strength between the non-adhesive-coated area of ​​the photovoltaic frame and the adhesive.

[0046] In one example, the coating method of the surface energy reducing agent on the non-preset adhesive coating area of ​​the photovoltaic frame includes one or more of spraying, brushing, roller coating and scraping.

[0047] In one example, the coating thickness of the surface energy reducer in the non-preset adhesive coating area of ​​the photovoltaic frame is 0.8 mm to 2 mm. It is understandable that the coating thickness of the surface energy reducer in the non-preset adhesive coating area of ​​the photovoltaic frame can be selected from any value between 0.8 mm and 2 mm. Specifically, the coating thickness of the surface area includes but is not limited to 0.8 mm, 0.9 mm, 1 mm, 1.2 mm, 1.5 mm, 1.8 mm, 1.9 mm or 2 mm, or is within the range formed by any two of the above point values ​​as end values.

[0048] In one example, the photovoltaic frame is provided with an installation groove for installing the laminate, and the specific steps of coating the surface energy reducer on the non-preset adhesive coating area of ​​the photovoltaic frame include: coating the surface energy reducer on the outer side of the installation groove of the photovoltaic frame.

[0049] In one example, the installation groove 10 is formed by enclosing a first clamping portion 101, a supporting portion 102, and a second clamping portion 103. The first clamping portion 101 includes a bent portion 101a bent toward the second clamping portion 103. The outer side of the installation groove is a side of the first clamping portion 101 away from the second clamping portion 103. A texture groove is also provided on the side of the first clamping portion 101 away from the second clamping portion 103.

[0050] The specific step of coating the surface energy reducing agent on the outer side of the installation groove of the photovoltaic frame includes: coating the surface energy reducing agent on a side of the first clamping portion 101 away from the second clamping portion 103 .

[0051] like Figure 1As shown, the photovoltaic frame includes a mounting groove 10 and a support frame 20. The mounting groove 10 is suitable for installing the laminate. The mounting groove 10 is formed by enclosing a first clamping portion 101, a support portion 102, and a second clamping portion 103. The first clamping portion 101 includes a horizontal portion and a bending portion 101a bent toward the second clamping portion 103. At this time, part of the adhesive used to bond the laminate will be filled into the groove on the lower surface of the bending portion, and part will overflow to the upper surface of the first clamping portion. Therefore, at this time, the outer side of the mounting groove is the side of the first clamping portion 101 away from the second clamping portion 103, that is, the non-preset adhesive coating area corresponds to the side A. Coating a surface energy reducer on the side of the first clamping portion 101 away from the second clamping portion 103 can treat and protect the area with the largest amount of residual glue. In addition, in pursuit of aesthetics, a texture structure is further provided on one side of the first clamping portion 101 away from the second clamping portion 103 , and the framing method of the present application can effectively remove the residual glue layer remaining in the texture groove.

[0052] In one example, the process parameters for coating the surface energy reducing agent on the side of the first clamping portion away from the second clamping portion include: the coating length of the surface energy reducing agent on the surface of the side of the first clamping portion away from the second clamping portion is 10 mm to 20 mm. At this time, the length direction is perpendicular to the plane where the width and height are located.

[0053] It can be understood that the coating width of the surface energy reducing agent on the surface of the first clamping part away from the second clamping part is the width of the groove portion of the texture.

[0054] In one example, the specific step of bonding the preset adhesive coating area of ​​the pre-processed photovoltaic frame and the laminate by adhesive includes: filling adhesive between the support portion 102 of the pre-processed photovoltaic frame and the laminate to bond the pre-processed photovoltaic frame and the laminate. Filling adhesive on the surface of the support portion 102 can reduce the amount of adhesive while ensuring the bonding performance; thereby effectively avoiding the overflow of the adhesive layer.

[0055] In one example, after the step of bonding the preset adhesive-coated area of ​​the pre-processed photovoltaic frame and the laminate by adhesive and performing the framing process, the step further includes:

[0056] The adhesive and the protective layer in the non-preset adhesive coating area are removed.

[0057] In one example, the adhesive and the protective layer in the non-preset adhesive coating area are removed by one or more of organic solvent scrubbing and physical peeling. For example, the organic solvent includes but is not limited to alcohol solvents and ketone solvents. Specifically, the alcohol solvent includes but is not limited to methanol and ethanol. Ketone solvents include but are not limited to acetone and butanone.

[0058] In one example, the coating method of the surface energy reducing agent on the non-preset adhesive coating area of ​​the photovoltaic frame includes one or more of spraying, brushing, roller coating and scraping.

[0059] In one example, the coating temperature of the surface energy reducing agent on the non-preset adhesive coating area of ​​the photovoltaic frame is room temperature. The temperature of the coating surface treatment is room temperature, which does not require additional heating, can reduce energy consumption, and is not limited by conditions. For example, the surface energy reducing agent can be applied during the entire preparation process of the photovoltaic module and before applying the adhesive.

[0060] Specifically, the preparation method of the photovoltaic module includes the following steps: S10, string welding; S20, lamination; S30, pre-layer inspection; S40, lamination; S50, framing; S60, junction box installation; S70, cleaning; S80, test packaging.

[0061] More specifically, step S10, string welding includes: welding the interconnection strip to the main grid line of the battery cell, and welding the front of the battery cell and the back of the surrounding battery cells together through the interconnection strip to prepare a battery string. Step S20, lamination includes: laminating the battery string with glass and backboard materials to prepare a pre-laminated assembly. Step S30, pre-layer inspection includes: checking the pre-laminated assembly for abnormal phenomena such as fragments, cold solder joints, and broken grids. Step S40, lamination includes: placing the pre-laminated assembly into a laminator, bonding the pre-laminated assembly, and preparing a laminate. Step S50, framing includes: coating a surface energy reducer on the non-preset adhesive coating area of ​​the photovoltaic frame, so that the surface energy reducer forms a protective layer, and then preparing a pre-treated photovoltaic frame; the pre-treated photovoltaic frame and the laminate are bonded by an adhesive and framed. Step S60, junction box installation includes: connecting the internal circuits of the junction box and the laminate to prepare a photovoltaic module. Step S70, cleaning includes: removing stains on the surface of the photovoltaic module to increase light transmittance. Step S80, testing packaging includes: detecting whether the photovoltaic module can operate normally.

[0062] It is understandable that after the framing method of the present application is used, if there is residual glue layer, it will be cleaned in step S70, along with the cleaning of stains on the surface glass and backboard material of the photovoltaic module, and the residual amount of the glue layer will be greatly reduced. Therefore, the framing method provided by the present application hardly requires the introduction of additional cleaning steps in the entire photovoltaic module preparation process.

[0063] The following further specific examples are provided to explain the present application in detail. It should also be understood that the following examples are only used to further explain the present application and cannot be understood as limiting the scope of protection of the present application. Some non-essential improvements and adjustments made by those skilled in the art based on the above content of the present application belong to the scope of protection of the present application. The specific process parameters of the following embodiments are also only examples within a suitable range, that is, those skilled in the art can make a selection within a suitable range through the description herein, and are not necessarily limited to the specific values ​​of the embodiments below.

[0064] Example 1

[0065] The structure of the photovoltaic frame: Figure 1 The photovoltaic frame includes a mounting groove 10 and a support frame 20. The mounting groove 10 is suitable for mounting the laminate. The mounting groove 10 is formed by a first clamping portion 101, a support portion 102 and a second clamping portion 103. The first clamping portion 101 includes a horizontal portion and a bent portion 101a bent toward the second clamping portion 103. A texture structure is provided on a side surface of the first clamping portion 101 away from the second clamping portion 103, that is, a texture structure is provided on the upper surface of the horizontal portion and a part of the bent portion 101a, and a depth of the texture groove is about 0.3 mm.

[0066] The steps of preparing a photovoltaic module include: (1) welding: welding the interconnection bar to the main grid line of the battery cell, and welding the front of the battery cell and the back of the surrounding battery cells together through the interconnection bar to prepare a battery string. (2) lamination: laminating the battery string with glass and backplane materials to prepare a pre-laminated module. (3) pre-lamination inspection: checking the pre-laminated module for abnormal phenomena such as fragments, cold solder joints, broken grids, etc. (4) lamination: placing the pre-laminated module into a laminator to bond the pre-laminated module to prepare a laminate. (5) framing: applying vaseline at room temperature along the texture groove on the side of the first clamping part 101 away from the second clamping part 103, that is, on the side A, with a fine brush. The thickness of the vaseline is about 1 mm, and the coating length of the vaseline on the side A is 20 mm; after the vaseline is dried, a protective layer is formed to prepare a pre-treated photovoltaic frame. The adhesive is filled between the pre-treated photovoltaic frame support and the laminate, and the frame is installed. During this process, the white adhesive overflows into the groove of the texture structure. (6) Wire box installation: The internal circuits of the junction box and the laminate are connected to prepare the photovoltaic module. (7) Cleaning includes: scrubbing the stains on the surface of the photovoltaic module. After scrubbing, the number of photovoltaic frames in the photovoltaic module production line that still have glue layer residue is counted. At this time, the number of photovoltaic frames with glue layer residue accounts for about 5%, among which the glue layer residue mainly exists in the texture groove. (8) Test packaging: The cured adhesive layer is torn along the texture. At this time, the number of photovoltaic frames with no glue layer residue in the texture groove accounts for about 100%.

[0067] Example 2

[0068] The structure of the photovoltaic frame is the same as that of Example 1.

[0069] The steps of preparing a photovoltaic module include: (1) welding: welding the interconnection bar to the main grid line of the cell, and welding the front of the cell and the back of the surrounding cells together through the interconnection bar to prepare a cell string. (2) lamination: laminating the cell string with glass and backplane materials to prepare a pre-laminated component. (3) pre-lamination inspection: checking the pre-laminated component for abnormal phenomena such as fragments, cold solder joints, and broken grids. (4) lamination: placing the pre-laminated component into a laminator to bond the pre-laminated component to prepare a laminate. (5) framing: applying silicone oil with a thickness of about 1 mm along the texture groove at room temperature on the side of the first clamping part 101 away from the second clamping part 103, that is, on the side A, with a fine brush, and the coating length of the silicone oil on the side A is 20 mm; after the silicone oil is dried, a protective layer is formed to prepare a pre-treated photovoltaic frame. Filling adhesive between the pre-treated photovoltaic frame support part and the laminated part, and framing is performed. During this process, the white adhesive overflows into the groove of the texture structure. (6) Wire box installation: connect the internal circuits of the junction box and the laminate to prepare the photovoltaic module. (7) Cleaning includes: scrubbing the stains on the surface of the photovoltaic module. After scrubbing, count the number of photovoltaic frames in the photovoltaic module production line that still have glue layer residue. At this time, about 4% of the photovoltaic frames have glue layer residue, among which the glue layer residue mainly exists in the texture groove. (8) Test packaging: tear the cured adhesive layer along the texture. At this time, about 100% of the photovoltaic frames have no glue layer residue in the texture groove.

[0070] Example 3

[0071] The structure of the photovoltaic frame is the same as that of Example 1.

[0072] The steps of preparing a photovoltaic module include: (1) String welding: welding the interconnection bar to the main grid line of the battery cell, and welding the front of the battery cell and the back of the surrounding battery cells together through the interconnection bar to prepare a battery string. (2) Lamination: laminating the battery string with glass and backplane materials to prepare a pre-laminated module. (3) Pre-layer inspection: inspecting the pre-laminated module for abnormal phenomena such as fragments, cold solder joints, and broken grids. (4) Lamination: placing the pre-laminated module into a laminator to bond the pre-laminated module to prepare a laminate. (5) Framing: applying vaseline at room temperature along the texture groove on the side of the first clamping part 101 away from the second clamping part 103, that is, on the side A, with a fine brush. The thickness of the vaseline is about 0.5 mm, and the coating length of the vaseline on the side A is 20 mm; after the vaseline is dried, a protective layer is formed to prepare a pre-treated photovoltaic frame. The adhesive is filled between the pre-treated photovoltaic frame support and the laminate, and the frame is installed. During this process, the white adhesive overflows into the groove of the texture structure. (6) Wire box installation: The internal circuits of the junction box and the laminate are connected to prepare the photovoltaic module. (7) Cleaning includes: scrubbing the stains on the surface of the photovoltaic module, and counting the number of photovoltaic frames with residual glue layer in the photovoltaic module production line. At this time, about 15% of the photovoltaic frames have residual glue layer, among which the residual glue layer mainly exists in the texture groove. (8) Test packaging: The cured adhesive layer is torn along the texture. At this time, about 100% of the photovoltaic frames have no residual glue layer in the texture groove.

[0073] Comparative Example 1

[0074] The structure of the photovoltaic frame: Figure 1 The photovoltaic frame includes a mounting groove 10 and a support frame 20. The mounting groove 10 is suitable for mounting the laminate. The mounting groove 10 is formed by a first clamping portion 101, a support portion 102, and a second clamping portion 103. The first clamping portion 101 includes a horizontal portion and a bent portion 101a bent toward the second clamping portion 103. A texture structure is provided on a surface of one side of the horizontal portion away from the second clamping portion 103, and a depth of the texture groove is about 0.3 mm.

[0075] The preparation steps of photovoltaic modules include: (1) String welding: Weld the interconnection strips to the main grid lines of the battery cells, and weld the front of the battery cells and the back of the surrounding battery cells together through the interconnection strips to prepare battery strings. (2) Lamination: Lay the battery strings together with the glass and backplane materials to prepare pre-laminated modules. (3) Pre-layer inspection: Check the pre-laminated modules for abnormal phenomena such as fragments, cold solder joints, and broken grids. (4) Lamination: Place the pre-laminated modules in a laminator to bond the pre-laminated modules to prepare laminated sheets. (5) Framing: Fill the gap between the photovoltaic frame support and the laminate and perform framing. During this process, the white adhesive overflows into the grooves of the texture structure. (6) Wire box installation: Connect the internal circuits of the junction box and the laminate to prepare photovoltaic modules. (7) Cleaning includes: scrubbing the stains on the surface of the photovoltaic modules, and counting the number of photovoltaic frames with residual adhesive layer in the photovoltaic module production line. At this time, about 90% of the photovoltaic frames have residual adhesive layer, among which the residual adhesive layer mainly exists in the texture grooves. (8) Test packaging: The cured adhesive layer cannot be torn along the texture, and about 90% of the photovoltaic frames still have residual adhesive layer.

[0076] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0077] The above-described embodiments only express several implementation methods of the present application, which is convenient for understanding the technical solution of the present application in detail, but it cannot be understood as limiting the scope of protection of the invention patent. It should be pointed out that for ordinary technicians in this field, without departing from the concept of the present application, several modifications and improvements can be made, which all belong to the scope of protection of the present application. It should be understood that the technical solutions obtained by those skilled in the art through logical analysis, reasoning or limited experiments on the basis of the technical solutions provided in the present application are all within the scope of protection of the claims attached to the present application. Therefore, the scope of protection of the patent of this application shall be based on the content of the attached claims, and the description can be used to interpret the content of the claims.

Claims

1. A method for preparing a photovoltaic module, characterized in that: The following steps are involved: Coating a surface energy reducing agent on a non-preset adhesive coating area of ​​a photovoltaic frame, so that the surface energy reducing agent forms a protective layer, thereby preparing a pretreated photovoltaic frame; The preset adhesive-coated area of ​​the pre-processed photovoltaic frame and the laminate are bonded by adhesive to perform framing.

2. The method for preparing a photovoltaic module according to claim 1, characterized in that: The surface energy reducing agent includes one or more of fatty acid, paraffin, glycerin, vaseline, silicone oil, polyethylene glycol and low molecular weight polyethylene; Wherein, the number average molecular weight of the low molecular weight polyethylene is 1000-5000.

3. The method for preparing a photovoltaic module according to claim 1, characterized in that: The material of the photovoltaic frame includes one or more of metal materials and resin materials.

4. The method for preparing a photovoltaic module according to claim 1, characterized in that: The coating thickness of the surface energy reducing agent on the non-preset adhesive coating area of ​​the photovoltaic frame is 0.8mm~2mm.

5. The method for preparing a photovoltaic module according to any one of claims 1 to 4, characterized in that: The photovoltaic frame is provided with an installation groove for installing the laminate, and the specific step of coating the surface energy reducer on the non-preset adhesive coating area of ​​the photovoltaic frame includes: coating the surface energy reducer on the outer side of the installation groove of the photovoltaic frame.

6. The method for preparing a photovoltaic module according to claim 5, characterized in that: The installation groove is formed by enclosing a first clamping portion, a supporting portion, and a second clamping portion, wherein the first clamping portion includes a bent portion bent toward the second clamping portion, and a pattern groove is further provided on a side of the first clamping portion away from the second clamping portion; the outer side surface of the installation groove is a side of the first clamping portion away from the second clamping portion; The specific step of coating the surface energy reducing agent on the outer side of the installation groove of the photovoltaic frame includes: coating the surface energy reducing agent on a side of the first clamping portion away from the second clamping portion.

7. The method for preparing a photovoltaic module according to claim 6, characterized in that: The process parameters for coating the surface energy reducing agent on the side of the first clamping portion away from the second clamping portion include: the coating length of the surface energy reducing agent on the surface of the side of the first clamping portion away from the second clamping portion is 10 mm to 20 mm.

8. The method for preparing a photovoltaic module according to claim 6, characterized in that: The specific step of bonding the preset adhesive coating area of ​​the pre-processed photovoltaic frame and the laminate by adhesive includes: filling adhesive between the support portion of the pre-processed photovoltaic frame and the laminate to bond the pre-processed photovoltaic frame and the laminate.

9. The method for preparing a photovoltaic module according to any one of claims 1 to 4, characterized in that: After the step of bonding the preset adhesive-coated area of ​​the pre-processed photovoltaic frame and the laminate by adhesive and performing framing, the method further includes: The adhesive and the protective layer in the non-preset adhesive coating area are removed.

10. The method for preparing a photovoltaic module according to claim 9, characterized in that: The adhesive and the protective layer in the non-preset adhesive coating area are removed in a manner including one or more of organic solvent scrubbing and physical peeling.

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