A photovoltaic module lamination method and apparatus

Abstract

The embodiment of the present application relates to the field of photovoltaic module production, and discloses a photovoltaic module layering method and device.In the present application, after the glass material is placed on the assembly line in the photovoltaic module layering process, a preset amount of electric charge is generated on the surface of the glass material by an electrostatic generator, then the first adhesive film is laid on the surface of the glass material with the electric charge, at this time the glass material with the first adhesive film is conveyed by the assembly line, and finally the cell piece, the second adhesive film and the back plate are laid on the first adhesive film in sequence; wherein the preset amount of electric charge is released before or after the cell piece, the second adhesive film and the back plate are laid on the first adhesive film in sequence. After the surface of the glass material is provided with the preset amount of electric charge, the phenomenon of slipping and material displacement during the laying process and the conveying process on the assembly line after the laying can be prevented, the adverse results in the module manufacturing process caused by the slipping can be avoided, and the present application is suitable for various different photovoltaic module materials.

Description

Technical Field

[0001] This invention relates to the field of photovoltaic module manufacturing, and in particular to a method and apparatus for stacking photovoltaic modules. Background Technology

[0002] In the production of photovoltaic modules, the first step is the preparation of auxiliary materials. During this initial preparation process, when the encapsulant film is laid on the glass, slippage can occur between the film and the glass due to factors such as ambient temperature, humidity, and the film's own arching and patterns. Currently, methods to prevent slippage during module production include: ① adding an encapsulant film smoothing device after cutting; ② increasing manual spot welding; ③ increasing the roughness of the glass; ④ modifying the encapsulant film pattern process, etc. All of these methods reduce the frequency of slippage by increasing the friction between the glass and the encapsulant film.

[0003] The inventors of this invention discovered that existing anti-slip solutions for front-end material supply alter the patterning process of the adhesive film and increase glass roughness. Since multiple material suppliers are involved in module manufacturing, and each supplier's adhesive film manufacturing process has variations, front-end material improvement solutions cannot completely solve the adhesive film slippage problem during module production. Anti-slip solutions during module production involve adding adhesive film smoothing devices after cutting and increasing manual spot welding. The main purpose of the adhesive film smoothing device is to expel air generated between the adhesive film and glass due to uneven film laying, effectively solving the problem of film bulging, but it cannot solve the slippage problem between the adhesive film and glass. Furthermore, spot welding during module manufacturing can affect module reliability. Therefore, the existing solutions that address slippage by increasing friction between the adhesive film and glass cannot completely eliminate slippage during module production. Adverse consequences of adhesive film slippage during module manufacturing include: cell cracking, cell displacement, spacing issues, insufficient adhesive, and air bubbles. Summary of the Invention

[0004] The purpose of this invention is to provide a method and apparatus for stacking photovoltaic modules, which can effectively solve the slippage problem in the module production process, avoid adverse results in the module manufacturing process caused by slippage, and is applicable to various photovoltaic module materials.

[0005] To address the aforementioned technical problems, embodiments of the present invention provide a photovoltaic module stacking method, comprising: placing glass material on a production line; generating a preset amount of charge on the surface of the glass material using an electrostatic generator; laying a first encapsulant film on the surface of the glass material carrying the charge; conveying the glass material with the first encapsulant film laid on it via the production line; and sequentially laying solar cells, a second encapsulant film, and a backsheet on the first encapsulant film; wherein, before or after sequentially laying the solar cells, the second encapsulant film, and the backsheet on the first encapsulant film, the preset amount of charge is released.

[0006] An embodiment of the present invention also provides a photovoltaic module stacking device, comprising: a glass feeding module for placing glass material on a production line; an electrostatic generator for generating a preset amount of charge on the surface of the glass material; a first laying module for laying a first encapsulant film on the surface of the glass material carrying the preset amount of charge; a conveying module for conveying the glass material with the first encapsulant film laid on it through the production line; a second laying module for sequentially laying solar cells, a second encapsulant film, and a backsheet on the first encapsulant film; and a discharge module for releasing the preset amount of charge before or after sequentially laying the solar cells, the second encapsulant film, and the backsheet on the first encapsulant film.

[0007] In this embodiment of the invention, during the photovoltaic module stacking process, after the glass material is placed on the production line, a preset amount of charge is generated on the surface of the glass material by an electrostatic generator. Then, a first encapsulant film is laid on the surface of the charged glass material. At this time, the glass material with the first encapsulant film is conveyed by the production line. Finally, the solar cells, the second encapsulant film, and the backsheet are sequentially laid on the first encapsulant film. The preset amount of charge is released before or after the solar cells, the second encapsulant film, and the backsheet are sequentially laid on the first encapsulant film. After the glass material surface is charged with a predetermined amount of charge, the glass material acquires electrostatic adsorption capabilities. At this point, laying the first adhesive film on the surface of the glass material can prevent slippage and material displacement during the laying process and during conveyor transport on the production line. Furthermore, discharging the solar cells, the second adhesive film, and the backsheet before laying them on the first adhesive film can prevent the carried charge from damaging the solar cells and the backsheet, ensuring their reliability. Discharging the solar cells, the second adhesive film, and the backsheet after laying them on the first adhesive film can prevent slippage and material displacement during the laying of photovoltaic module materials such as solar cells, the second adhesive film, and the backsheet. This method differs from the principle of increasing friction to prevent slippage and is applicable to various photovoltaic module materials.

[0008] Furthermore, the process of generating a preset amount of charge on the surface of the glass material using an electrostatic generator includes: generating a preset value of positive or negative voltage using the electrostatic generator main unit; generating a preset amount of positive or negative charge using an electrostatic generating rod based on the preset value of positive or negative voltage; and emitting the preset amount of positive or negative charge onto the surface of the glass material using the electrostatic generating rod. The electrostatic generator main unit combined with the electrostatic generating rod allows for a simple, safe, and efficient way to enable the glass material to carry a sufficient amount of charge, thereby achieving electrostatic adsorption capabilities.

[0009] Furthermore, the length of the electrostatic generating rod is greater than or equal to the length of the glass material. The length of the electrostatic generating rod is determined by the size of the glass material that needs to carry the charge. Setting the length of the electrostatic generating rod to be greater than or equal to the length of the glass material can increase the compatibility between the electrostatic generating rod and the material in the electrostatic generating device, ensuring the effective application of charge.

[0010] Furthermore, the length of the electrostatic generating rod is specifically 1 to 1.5 times the length of the glass material. The length of the electrostatic generating rod is determined by the size of the glass material to be charged, and setting the length of the electrostatic generating rod to 1 to 1.5 times the length of the glass material ensures the compatibility between the electrostatic generating rod and the charged material, saving costs and improving work efficiency while ensuring the effectiveness of charging.

[0011] Furthermore, the preset value of the positive or negative voltage is 20–60 kV or -20–60 kV. Since a higher voltage value results in a larger effective range for the electrostatic generator to produce static electricity, setting the preset voltage value to 20–60 kV or -20–60 kV satisfies the requirements while avoiding excessively high voltage settings that could waste electricity and pose safety hazards.

[0012] In addition, the distance between the height at which the electrostatic generating rod is placed and the height at which the glass material is placed is 5 to 10 centimeters. Since the higher the voltage value, the larger the effective range of the electrostatic generating rod in generating static electricity, the height at which the electrostatic generating rod is placed can be determined according to the preset voltage value. Setting the height of the electrostatic generating rod to 5 to 10 centimeters away from the glass material controls the effective range of the electrostatic generating rod in generating static electricity and ensures that the requirements are met.

[0013] In addition, before generating a preset amount of charge on the glass material surface using an electrostatic generator, the method further includes cleaning the glass material surface; wherein, cleaning the glass material surface includes: performing a first cleaning of the glass material surface using an electrostatic brush, and a second cleaning of the glass material surface using an ion fan. Multiple cleanings of the glass material surface using an electrostatic brush and an ion fan remove natural static electricity and impurities, preventing air bubbles from forming during subsequent material laying and improving safety during the photovoltaic module stacking process.

[0014] Furthermore, after the first adhesive film is laid on the surface of the glass material carrying the charge, the first adhesive film is cut; after the second adhesive film is laid, and before the preset amount of charge is released, the second adhesive film is cut. After the glass material is given sufficient charge to acquire adsorption function, both the first and second adhesive films will adhere tightly to other photovoltaic module laminated materials. Cutting the first and second adhesive films separately at this time can avoid slippage and material displacement during the film cutting process.

[0015] Furthermore, after laying the second adhesive film and before releasing the preset amount of charge, both the first and second adhesive films are simultaneously cut. After the glass material is charged with sufficient charge to achieve adsorption, the first and second adhesive films will adhere tightly to other photovoltaic module laminated materials. Cutting the first and second adhesive films simultaneously at this time can prevent slippage and material displacement during the cutting process, while also improving cutting efficiency. Attached Figure Description

[0016] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0017] Figure 1 This is a flowchart of a photovoltaic module stacking method according to one embodiment of the present invention;

[0018] Figure 2 This is a schematic diagram illustrating the function of an electrostatic generator according to one embodiment of the present invention;

[0019] Figure 3 This is a flowchart of another photovoltaic module stacking method according to one embodiment of the present invention;

[0020] Figure 4 A schematic diagram of a photovoltaic module stacking device according to one embodiment of the present invention.

[0021] Figure label:

[0022] 1-Glass Material

[0023] 2- Assembly Line

[0024] 3-Electrostatic generator

[0025] 4-Static generator main unit

[0026] 5-Static Electrostatic Generator

[0027] 6-Grounding terminal of electrostatic generator

[0028] 7-Construction line grounding terminal Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the various embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, those skilled in the art will understand that many technical details are presented in the various embodiments of the present invention to facilitate a better understanding of this application. However, the technical solutions claimed in this application can be implemented even without these technical details and various changes and modifications based on the following embodiments. The division of the various embodiments below is for ease of description and should not constitute any limitation on the specific implementation of the present invention. The various embodiments can be combined with and referenced by each other without contradiction.

[0030] One embodiment of the present invention relates to a photovoltaic module stacking method, which can be applied in the photovoltaic module manufacturing process. In this embodiment, the method includes the following steps: placing glass material on an assembly line; generating a preset amount of charge on the surface of the glass material using an electrostatic generator; laying a first encapsulant film on the surface of the charged glass material; conveying the glass material with the first encapsulant film laid on it via the assembly line; and sequentially laying solar cells, a second encapsulant film, and a backsheet on the first encapsulant film; wherein, before or after sequentially laying the solar cells, the second encapsulant film, and the backsheet on the first encapsulant film, the preset amount of charge is released. After the glass material surface is charged with a predetermined amount of charge, it acquires electrostatic adsorption capabilities. Applying the first encapsulant film to the glass surface at this point prevents slippage and material displacement during the installation process and on the assembly line. Furthermore, discharging the solar cells, second encapsulant film, and backsheet before laying them onto the first encapsulant film prevents the carried charge from damaging the cells and backsheet, ensuring their reliability. Discharging after laying them onto the first encapsulant film prevents slippage and material displacement during installation. This method differs from increasing friction to prevent slippage and is applicable to various photovoltaic module materials. The following details the implementation of the photovoltaic module stacking method of this embodiment. These details are provided for ease of understanding and are not essential for implementing this solution.

[0031] like Figure 1 As shown, one embodiment of this implementation may include the following steps:

[0032] Step S101: Place the glass material on the production line.

[0033] In the process of stacking photovoltaic modules, the glass material is first placed on the production line.

[0034] In one example, after the glass material is placed on the production line, before a preset amount of charge is generated on the surface of the glass material by an electrostatic generator, the surface of the glass material can be cleaned; wherein, the cleaning of the glass material surface includes: a first cleaning of the glass material surface by an electrostatic brush, and a second cleaning of the glass material surface by an ion fan.

[0035] The natural static electricity and impurities on the surface of the glass material are cleaned multiple times by electrostatic brushes and ion fans to avoid air bubbles during subsequent material laying and to improve the safety of photovoltaic module stacking.

[0036] Step S102: A preset amount of charge is generated on the surface of the glass material using an electrostatic generator.

[0037] After the glass material is placed on the production line, a preset amount of charge is generated on the surface of the glass material by an electrostatic generator.

[0038] In one example, such as Figure 2 As shown, after placing the glass material 1 on the production line 2, a preset amount of charge can be generated on the surface of the glass material 1 by the electrostatic generator 3. The steps include: generating a preset value of positive or negative voltage through the electrostatic generator host 4; generating a preset amount of positive or negative charge through the electrostatic generator rod 5 according to the preset value of positive or negative voltage; and emitting the preset amount of positive or negative charge to the surface of the glass material 1 through the electrostatic generator rod.

[0039] The electrostatic generator has stable performance, continuously adjustable operating voltage, and is simple and convenient to install.

[0040] The charging effect of an electrostatic generator, that is, the effect of applying static electricity or charge to a material surface, is related to the structure and installation of the electrostatic emitter. The structure and installation method of the electrostatic emitter can be adjusted according to actual conditions. The electrostatic generator can be grounded through its grounding terminal 6 to avoid affecting the charging effect or creating unsafe conditions.

[0041] The operating voltage of the electrostatic generator main unit can be gradually increased from low to high, based on the principle of meeting the charge application requirements. This avoids wasting electricity or posing safety hazards by setting the voltage too high.

[0042] Sufficient charge can be carried on the surface of the material being electrostatically charged, or the charge carrying time can be extended, by increasing the insulation value of the material or by increasing the dryness of the material and the ambient air.

[0043] In one example, the length of the electrostatic generating rod is greater than or equal to the length of the glass material.

[0044] The charging effect of an electrostatic generator, that is, the effect of adding static electricity or the effect of adding charge to the surface of a material, is related to the structure and installation of the electrostatic emitter. The structure and installation method of the electrostatic emitter can be adjusted according to the actual situation.

[0045] The length of the electrostatic generator rod is determined by the size of the glass material to be charged. Setting the length of the generator rod to be greater than or equal to the length of the glass material increases the compatibility between the generator rod and the material, ensuring effective charge application. For example, the length of the generator rod can be equal to the length of the glass material, minimizing its length, reducing equipment and operating costs, and avoiding energy waste. In another example, the length of the generator rod is specifically 1 to 1.5 times the length of the glass material. Setting the length of the generator rod to 1 to 1.5 times the length of the glass material ensures compatibility between the generator rod and the material to be charged, saving costs, avoiding energy waste, improving operational efficiency, and ensuring effective charge application.

[0046] The charging effect of an electrostatic generator, that is, the effect of adding static electricity or the effect of adding charge to the surface of a material, is related to the structure and installation of the electrostatic emitter. The structure and installation method of the electrostatic emitter can be adjusted according to the actual situation.

[0047] In one example, the preset value for positive or negative voltage is 20–60 kV or 20–60 kV.

[0048] Since the higher the voltage value, the larger the effective range of static electricity generation by the static electricity generator, setting the preset voltage value to +20 to 60 kV or -20 to 60 kV can meet the needs while avoiding the waste of electricity and potential safety hazards caused by setting the voltage too high.

[0049] In one example, the distance between the height at which the electrostatic generating rod is placed and the height at which the glass material is placed is 5 to 10 centimeters.

[0050] Since a higher voltage value results in a larger effective range for the static electricity generator to generate static electricity, the placement height of the static electricity generator can be determined based on the preset voltage value. The placement height of the static electricity generator can be set to 5-10 cm away from the glass material to control the effective range of static electricity generation and ensure that the requirements are met.

[0051] Step S103: The first adhesive film is laid on the surface of the charged glass material.

[0052] In one example, after the first adhesive film is laid on the surface of the charged glass material, the first adhesive film can be cut.

[0053] After the glass material is charged with enough charge to gain adsorption function, the first adhesive film will adhere tightly to the other photovoltaic module laminated materials. At this time, cutting the first adhesive film can avoid slippage and displacement between materials during the cutting process.

[0054] Step S104: The glass material with the first adhesive film laid on it is conveyed through the production line.

[0055] After the glass material surface is charged with a preset amount of charge, the glass material has electrostatic adsorption ability. At this time, the first adhesive film is laid on the surface of the glass material to prevent slippage and displacement between materials during the laying process and during the conveyor belt process after laying.

[0056] In one example, the magnitude of the positive or negative voltage can also be adjusted based on the slippage between the materials.

[0057] The more severe the slippage, the more charge the electrostatic material needs, and the voltage can be increased accordingly.

[0058] Adjusting the voltage of the electrostatic generator main unit can control the amount of charge generated by the electrostatic generating rod. In order to generate a sufficient amount of charge required for the material to be electrostatically applied, the voltage of the electrostatic generator main unit can be adjusted to obtain a sufficient amount of charge required for the material and eliminate slippage.

[0059] Step S105: Release the preset amount of charge.

[0060] like Figure 2 As shown, the production line platform can be grounded through the production line grounding terminal 7, i.e., connected to the working ground of the electrostatic generator main unit; or, a flat "metal tray" or "metal mesh" can be added to the back of the material to be electrostatically charged, and this metal tray is connected to the "ground," i.e., the working ground of the electrostatic generator main unit; the aforementioned operations can form a "circuit" during electrostatic discharge. During electrostatic discharge, the area of ​​the material to be electrostatically charged can be made equal to the area of ​​the metal tray, thus avoiding discharge to a bare metal tray and avoiding safety hazards. The specific discharge method is not limited in this embodiment.

[0061] Step S106: The battery cell, the second adhesive film, and the backsheet are sequentially laid on the first adhesive film.

[0062] Discharging the cells, second encapsulant film, and backsheet before laying them on the first encapsulant film can prevent the carried charge from damaging the cells and backsheet, and ensure the reliability of photovoltaic module materials such as cells and backsheets.

[0063] Through steps S101 to S106 of the above embodiments of the present invention, it is possible to achieve the following in the photovoltaic module stacking process: after the glass material is placed on the production line, a preset amount of charge is generated on the surface of the glass material by an electrostatic generator. Then, a first encapsulant film is laid on the surface of the charged glass material. At this time, the glass material with the first encapsulant film is conveyed by the production line. Then, the charge carried by the photovoltaic module material is released. Finally, the solar cells, the second encapsulant film, and the backsheet are sequentially laid on the first encapsulant film. After the glass material surface carries a preset amount of charge, the glass material has electrostatic adsorption capacity. At this time, laying the first encapsulant film on the surface of the glass material can prevent slippage and material displacement during the laying process and during the conveying process on the production line after laying. Furthermore, discharging before laying the solar cells, the second encapsulant film, and the backsheet on the first encapsulant film can prevent the carried charge from damaging the solar cells and the backsheet, and ensure the reliability of the solar cells, the backsheet, and other photovoltaic module materials. At the same time, unlike the principle of increasing friction to prevent slippage, this method is applied to the module end and is applicable to various photovoltaic module materials.

[0064] Or, such as Figure 3 As shown, another embodiment of this implementation can also include the following steps S201 to S206. It is understood that steps S201 to S204 in this implementation are roughly the same as steps S101 to S104 in the aforementioned embodiments. For details, please refer to the specific descriptions in the above embodiments, which will not be repeated here.

[0065] Step S201: Place the glass material on the production line.

[0066] Step S202: A preset amount of charge is generated on the surface of the glass material using an electrostatic generator.

[0067] Step S203: The first adhesive film is laid on the surface of the charged glass material.

[0068] Step S204: The glass material with the first adhesive film laid on it is conveyed through the production line.

[0069] Step S205: The battery cell, the second adhesive film, and the backsheet are sequentially laid on the first adhesive film.

[0070] In one example, the second adhesive film can be cut after it has been laid and before the preset amount of charge is released.

[0071] After the glass material is charged with sufficient charge to achieve adsorption, the second encapsulant film will adhere tightly to the other photovoltaic module laminates. Cutting the second encapsulant film at this point avoids slippage and material displacement that can occur during the cutting process. Therefore, the first and second encapsulant films are cut separately.

[0072] In one example, after the second adhesive film is laid out and before the preset amount of charge is released, the first and second adhesive films can be cut simultaneously.

[0073] After the first adhesive film is laid on the surface of the charged glass material and before the glass material with the first adhesive film is conveyed through the assembly line, if the first adhesive film is not cut, it can be cut simultaneously after the second adhesive film is laid and before the preset amount of charge is released. After the glass material is given sufficient charge to achieve adsorption, the first and second adhesive films will adhere tightly to other photovoltaic module laminated materials. Cutting the first and second adhesive films simultaneously at this time can avoid slippage and material displacement during the film cutting process and improve cutting efficiency.

[0074] Step S206: Release a preset amount of charge.

[0075] After the glass material surface carries a preset amount of charge, the glass material has electrostatic adsorption capacity. At this time, the solar cells, the second encapsulant film and the back sheet are laid on the first encapsulant film and then discharged, which can avoid slippage and displacement between materials when laying solar cells, the second encapsulant film and the back sheet and other photovoltaic module materials.

[0076] Through steps S201 to S206 of the above embodiments of the present invention, it is possible to achieve the following in the photovoltaic module stacking process: after the glass material is placed on the production line, a preset amount of charge is generated on the surface of the glass material by an electrostatic generator. Then, a first encapsulant film is laid on the surface of the charged glass material. At this time, the glass material with the first encapsulant film is conveyed by the production line. Then, the solar cells, the second encapsulant film, and the backsheet are sequentially laid on the first encapsulant film. Finally, the preset amount of charge is released. After the glass material surface carries a preset amount of charge, the glass material has electrostatic adsorption capacity. At this time, laying the solar cells, the second encapsulant film, and the backsheet on the first encapsulant film and then discharging can avoid slippage and material displacement that occurs when laying photovoltaic module materials such as solar cells, the second encapsulant film, and the backsheet. This is different from the principle of increasing friction to prevent slippage. It is applicable to various photovoltaic module materials when applied to the module end.

[0077] In this embodiment, during the photovoltaic module stacking process, after the glass material is placed on the production line, a preset amount of charge is generated on the surface of the glass material by an electrostatic generator. Then, a first encapsulant film is laid on the surface of the charged glass material. At this time, the glass material with the first encapsulant film is conveyed by the production line. Finally, the solar cells, the second encapsulant film, and the backsheet are sequentially laid on the first encapsulant film. Before or after the solar cells, the second encapsulant film, and the backsheet are sequentially laid on the first encapsulant film, the preset amount of charge is released. After the glass material surface is charged with a preset amount of charge, the glass material acquires electrostatic adsorption capabilities. At this point, laying the first film on the surface of the glass material can prevent slippage and material displacement during the laying process and during conveyor transport on the production line. Furthermore, discharging the solar cells, the second film, and the backsheet before laying them on the first film can prevent the carried charge from damaging the solar cells and the backsheet, ensuring their reliability. Discharging the solar cells, the second film, and the backsheet after laying them on the first film can prevent slippage and material displacement during the laying of photovoltaic module materials such as solar cells, the second film, and the backsheet. This method differs from the principle of increasing friction to prevent slippage and is applicable to various photovoltaic module materials.

[0078] The steps described above are for clarity only. In practice, they can be combined into one step or some steps can be broken down into multiple steps. As long as they include the same logical relationship, they are all within the scope of protection of this patent. Adding insignificant modifications or introducing insignificant designs to the steps or processes, but without changing the core design of the steps and processes, are also within the scope of protection of this patent.

[0079] Another embodiment of the present invention relates to a photovoltaic module stacking device, such as... Figure 4 As shown, the system includes: a glass loading module 301 for placing glass material on the production line; an electrostatic generator 302 for generating a preset amount of charge on the surface of the glass material; a first laying module 303 for laying a first adhesive film on the surface of the glass material carrying the preset amount of charge; a conveying module 304 for conveying the glass material with the first adhesive film laid on it via the production line; a second laying module 305 for sequentially laying a battery cell, a second adhesive film, and a backing plate on the first adhesive film; and a discharge module 306 for releasing the preset amount of charge before or after sequentially laying the battery cell, the second adhesive film, and the backing plate on the first adhesive film. It is worth noting that the connection relationship and order of the modules in this embodiment can be freely combined according to the actual implementation situation and are not subject to change. Figure 4 The connection relationships and order shown are subject to restrictions. For example, the discharge module can be placed after the transmission module and before the second laying module, or the discharge module can be placed after the second laying module, etc.

[0080] In this embodiment, during the photovoltaic module stacking process, after the glass material is placed on the production line by the glass feeding module, a preset amount of charge is generated on the surface of the glass material by the electrostatic generator. The first laying module lays the first encapsulant film on the surface of the charged glass material. The glass material with the first encapsulant film laid on it is conveyed through the production line by the conveying module. The second laying module lays the solar cells, the second encapsulant film, and the backsheet sequentially on the first encapsulant film. Before or after the solar cells, the second encapsulant film, and the backsheet are sequentially laid on the first encapsulant film by the discharge module, the preset amount of charge is released. After the glass material surface is charged with a preset amount of charge, the glass material acquires electrostatic adsorption capabilities. At this point, laying the first film on the surface of the glass material can prevent slippage and material displacement during the laying process and during conveyor transport on the production line. Furthermore, discharging the solar cells, the second film, and the backsheet before laying them on the first film can prevent the carried charge from damaging the solar cells and the backsheet, ensuring their reliability. Discharging the solar cells, the second film, and the backsheet after laying them on the first film can prevent slippage and material displacement during the laying of photovoltaic module materials such as solar cells, the second film, and the backsheet. This method differs from the principle of increasing friction to prevent slippage and is applicable to various photovoltaic module materials.

[0081] It is not difficult to see that this embodiment is a device embodiment corresponding to the above method embodiment, and this embodiment can be implemented in conjunction with the above method embodiment. The relevant technical details mentioned in the above method embodiment are still valid in this embodiment, and will not be repeated here to reduce repetition. Accordingly, the relevant technical details mentioned in this embodiment can also be applied to the above method embodiment.

[0082] It is worth mentioning that all modules involved in this embodiment are logical modules. In practical applications, a logical unit can be a physical unit, a part of a physical unit, or a combination of multiple physical units. Furthermore, to highlight the innovative aspects of this invention, this embodiment does not introduce units that are not closely related to solving the technical problem proposed by this invention; however, this does not mean that other units are absent from this embodiment.

[0083] Those skilled in the art will understand that the above embodiments are specific examples of implementing the present invention, and in practical applications, various changes in form and detail may be made without departing from the spirit and scope of the present invention.

Claims

1. A method for stacking photovoltaic modules, characterized in that, The method includes: Place the glass material on the assembly line; A preset amount of charge is generated on the surface of the glass material by an electrostatic generator, and the main unit of the electrostatic generator generates a preset value of positive or negative voltage, the preset value being positive 20~60 kV or negative 20~60 kV. The first adhesive film is laid on the surface of the glass material carrying the charge; The glass material coated with the first adhesive film is conveyed through the assembly line; The solar cells, the second adhesive film, and the backsheet are sequentially laid on the first adhesive film. Under the electrostatic adsorption of the charge on the surface of the glass material, the first adhesive film and the second adhesive film are tightly attached to the other photovoltaic module laminated materials. After the second adhesive film is laid and before the preset amount of charge is released, the first adhesive film and the second adhesive film are cut simultaneously. In this process, after the battery cell, the second adhesive film, and the backsheet are sequentially laid on the first adhesive film, the preset amount of charge is released.

2. The method according to claim 1, characterized in that, The process of generating a preset amount of charge on the surface of the glass material using an electrostatic generator includes: A preset positive or negative voltage is generated by the electrostatic generator main unit; Based on the preset value of positive or negative voltage, a preset amount of positive or negative charge is generated by an electrostatic generating rod. The electrostatic generating rod emits a preset amount of positive or negative charge onto the surface of the glass material.

3. The method according to claim 2, characterized in that, The length of the electrostatic generating rod is greater than or equal to the length of the glass material.

4. The method according to claim 3, characterized in that, The length of the electrostatic generating rod is 1 to 1.5 times the length of the glass material.

5. The method according to claim 2, characterized in that, The distance between the height at which the electrostatic generating rod is placed and the height at which the glass material is placed is 5 to 10 centimeters.

6. The method according to claim 1, characterized in that, Before generating a predetermined amount of charge on the surface of the glass material using an electrostatic generator, the method further includes: The surface of the glass material is cleaned; The cleaning of the glass material surface includes: a first cleaning of the glass material surface using an electrostatic brush, and a second cleaning of the glass material surface using an ion fan.

7. A photovoltaic module stacking device, characterized in that, The device includes: The glass feeding module is used to place glass materials on the production line; An electrostatic generator is used to generate a preset amount of charge on the surface of the glass material. The first laying module is used to lay the first adhesive film on the surface of the glass material carrying a preset amount of charge; A conveying module is used to convey the glass material covered with the first adhesive film through the assembly line; The second laying module is used to sequentially lay the battery cell, the second adhesive film and the backsheet on the first adhesive film. Under the electrostatic adsorption of the charge on the surface of the glass material, the first adhesive film and the second adhesive film are tightly attached to other photovoltaic module laminated materials. The cutting module is used to cut the first adhesive film and the second adhesive film simultaneously after the second adhesive film is laid and before the preset amount of charge is released. The discharge module is used to release the preset amount of charge after the battery cell, the second adhesive film and the backsheet are sequentially laid on the first adhesive film.

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