A packaging process and packaging equipment for a solar cell module

Abstract

The application provides a packaging process and packaging equipment of a solar cell module, and relates to the field of solar cells. The packaging process of the solar cell module is packaged by using the packaging equipment. The packaging equipment comprises an automatic feeding line, a first workstation automatic line, a second workstation automatic line, a third workstation automatic line, a fourth workstation automatic line and an automatic discharging line which are connected in sequence. The packaging process is used for installing a sealing sleeve around the solar cell module. The sealing sleeve can surround the solar cell module into a closed structure. A vacuum system draws out the gas in the solar cell module through the gas exhaust pipes on both sides of the sealing sleeve, so that the components of the solar cell module are tightly attached to each other. The EVA glue body is used for fixing the components of the solar cell module after the solidification device. The solar cell module is packaged by using the process, so that the bubble content in the solar cell module can be effectively reduced, and the packaging effect is improved.

Description

Technical Field

[0001] This invention relates to the field of solar cell technology, specifically to a solar cell module packaging process and packaging equipment. Background Technology

[0002] A solar cell module is a power generation unit composed of glass, EVA (ethylene-vinyl acetate copolymer), cells, and a backsheet, which are laid out, encapsulated, laminated, and then framed. Encapsulation is a crucial step in solar cell production; without a good encapsulation process, even the best cells cannot produce a good module. Encapsulation not only ensures the lifespan of the cells but also enhances their impact resistance. High product quality and long lifespan are key to winning customer satisfaction, therefore, the encapsulation quality of the module is extremely important.

[0003] Currently, the commonly used encapsulation process for solar cell modules is as follows: cell testing – front and back welding – series connection – installation – lamination – frame assembly – junction box welding – curing – module testing – appearance inspection – packaging and warehousing. Installation mainly refers to the stacking of glass, EVA, cells, and backsheet, typically from bottom to top: glass, first layer of EVA, cells, second layer of EVA, and backsheet. Lamination refers to the hot pressing of the installed components to form a single unit. Specifically, under a certain vacuum and temperature, the first and second layers of EVA in the stacked structure are thermally melted and cured, ensuring a good bond between the functional layers that make up the solar cell module.

[0004] In recent years, some companies have adopted roller presses and autoclaves instead of laminators for encapsulation. First, the laminated solar cell modules are passed through a roller press to initially remove air, allowing the two substrates to be preliminarily bonded together using a film. Then, the preliminarily bonded solar cell modules are placed into the chamber of an autoclave, the door is closed, and the temperature and pressure are increased simultaneously. This completely melts the film, and under the higher pressure within the autoclave chamber, the two substrates and the film adhere very well, significantly increasing the adhesion strength. Then, the temperature and pressure are reduced until it returns to normal, the autoclave door is opened, and the autoclave process is complete. The disadvantage of this process for encapsulating solar cell modules is that the use of both a roller press and an autoclave significantly increases equipment costs. Summary of the Invention

[0005] (a) Technical problems to be solved

[0006] To address the shortcomings of existing technologies, this invention provides a packaging process and equipment for solar cell modules, which solves the problem of high cost in solar cell packaging in existing technologies.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, the present invention provides the following technical solution: a solar cell module encapsulation process, comprising the following steps:

[0009] S1: Place the solar cell module on the automatic feeding line with the back panel of the solar cell module facing upwards. The automatic feeding line supports the solar cell module, so that the solar cell module is suspended in the air around its sides.

[0010] S2: The automatic feeding line will transport the solar cell modules to the first workbench automatic line, and the drilling device will drill holes in the back sheet of the solar cell modules, so that mounting holes are provided on the back sheet of the solar cell modules.

[0011] S3: The first workbench automatic line transports the solar panel to the second workbench automatic line. After the gluing device applies fixing glue in the mounting hole, the placement device places sealing sleeves on both sides of the solar panel and places junction boxes in the mounting hole.

[0012] S4: The second workbench automatic line transports the solar cell module to the third workbench automatic line. The solar cell module is no longer suspended in the air. The pressing device presses the sealing sleeve and junction box, and the heating device preheats the solar cell module.

[0013] S5: The third workbench automatic line transports the solar cell module to the fourth workbench automatic line. The vacuum system extracts the gas from the solar cell module through the suction pipe. The curing device cures the colloid in the solar cell module. After curing, the curing device slowly cools the solar cell.

[0014] S6: The fourth workbench automatic line transports the solar cell modules to the discharge automatic line.

[0015] Preferably, the mounting hole mates with the junction box, and an EVA film is fixedly connected to the lower side wall of the junction box.

[0016] Preferably, each of the sealing sleeves is provided with an air extraction pipe on one side, and an EVA film is fixedly connected to the inner wall of the sealing sleeve.

[0017] Preferably, the fixing adhesive is a component bonding fixing adhesive.

[0018] Preferably, two sealing sleeves are provided, and a sealing structure is provided between the two sealing sleeves. The inner sidewall of the sealing structure is fixedly connected with sealant.

[0019] Preferably, the heating temperature of the heating device is 80 degrees Celsius to 120 degrees Celsius.

[0020] Preferably, under the suction effect of the vacuum system, the pressure change range of the solar cell module is from atmospheric pressure to 1.5 MPa, the suction time is 50 to 80 minutes, the pressure holding time of the vacuum system is 15 to 30 minutes, and the pressure release time of the vacuum system is 20 to 40 minutes.

[0021] Preferably, the curing temperature of the curing device is 100-150 degrees Celsius, the heating time is 50-80 minutes, the holding time of the curing device is 15-30 minutes, and the cooling time of the curing device is 20-40 minutes.

[0022] Preferably, a packaging device is used for packaging, the packaging device including an automatic feeding line, a first workbench automatic line, a second workbench automatic line, a third workbench automatic line, a fourth workbench automatic line and an automatic discharging line connected in sequence.

[0023] A drilling device is provided on one side of the first workbench automatic line for drilling mounting holes in the back of the solar panel.

[0024] The second workbench automatic line is provided with a placement device and an adhesive applicator on one side. The placement device is used to place sealing sleeves on both sides of the solar panel assembly and to place junction boxes in the mounting holes. The adhesive applicator applies fixing adhesive to the mounting holes before the placement device places the junction boxes.

[0025] The upper side of the third workbench automatic line is equipped with a pressing device and a heating device. The pressing device is used to press the sealing sleeve and the junction box, and the heating device preheats the solar cell module.

[0026] The fourth workbench automatic line is equipped with a vacuum system and a curing device on both sides. The vacuum system can extract the gas from the solar panel assembly through the air extraction pipe, and the curing device is used to cure the colloid in the solar panel assembly.

[0027] The automated discharge line is used to transfer the cooled solar cell modules out.

[0028] (III) Beneficial Effects

[0029] This invention provides a packaging process and packaging equipment for solar cell modules. It includes the following features:

[0030] Beneficial effects:

[0031] 1. This encapsulation process involves installing a sealing sleeve around the solar cell module. The sealing sleeve forms a closed structure around the solar cell module. A vacuum system extracts gas from the solar cell module through suction pipes on both sides of the sealing sleeve, ensuring that the components of the solar cell module are tightly attached to each other. After passing through a curing device, EVA colloid fixes the components of the solar cell module. This process effectively reduces the air bubble content in the solar cell module, avoids the hard squeezing of the solar cell module by the laminator and roller press, reduces the breakage rate, and effectively improves the encapsulation quality of the solar cell module. In addition, after the suction pipes are removed, the sealing sleeve can protect the solar cell module and prevent damage to the perimeter of the solar cell module.

[0032] 2. This packaging process places mounting holes on one side of the backplate and uses adhesive to attach and fix the junction box, reducing material costs and thus production costs. The installation is stable and convenient. Fixing the junction box on the surface of the backplate makes the packaging process production line layout more integrated and suitable for industrial production. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the sealing device in this invention. Detailed Implementation

[0034] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0035] Example 1:

[0036] like Figure 1 As shown, this embodiment of the invention provides a packaging process for solar cell modules, which uses packaging equipment for packaging. The packaging equipment includes an automatic feeding line, a first automatic workbench line, a second automatic workbench line, a third automatic workbench line, a fourth automatic workbench line, and an automatic discharging line connected in sequence. The first automatic workbench line, the second automatic workbench line, the third automatic workbench line, and the fourth automatic workbench line all have the function of transporting solar cell modules.

[0037] A drilling device is installed on one side of the first workbench automatic line to drill mounting holes for the back sheet of the solar panel. The mounting holes are matched with the junction box. An EVA film is fixedly connected to the lower side wall of the junction box. EVA is a thermosetting adhesive film with superior adhesion, durability, and optical properties. It melts when heated to connect objects on both sides. After cooling, it can fix objects on both sides well.

[0038] The second workbench automatic line is equipped with a placement device and an adhesive applicator on one side. The placement device is used to place sealing sleeves on both sides of the solar panel assembly and to place junction boxes in the mounting holes. The adhesive applicator applies fixing adhesive to the mounting holes before the placement device places the junction boxes. The fixing adhesive is a component bonding fixing adhesive, which is generally a single-component silicone rubber. It can combine with moisture in the air at room temperature to cause cross-linking and vulcanization into a high-performance elastomer. It is an excellent adhesive and sealant for both metallic and non-metallic materials. It does not pollute the surrounding environment of the application site. The cured adhesive fully utilizes the excellent electrical properties of silicone materials, exhibiting resistance to tension, vibration, and impact over a wide temperature range (-60~180℃), and also possessing excellent acid resistance, heat resistance, cold resistance, and hydrophobicity.

[0039] The upper side of the third workbench automatic line is equipped with a pressing device and a heating device. The pressing device is used to press the sealing sleeve and junction box to fix the sealing sleeve to the solar cell module and fix the junction box in the mounting hole. The heating device preheats the solar cell module. The heating temperature of the heating device is between 80 degrees Celsius and 120 degrees Celsius, which can melt the EVA film in the solar cell module and avoid weakening the performance of the fixing adhesive due to excessive temperature. Each sealing sleeve is equipped with an air extraction pipe on one side. The inner wall of the sealing sleeve is fixedly connected with EVA film to fix the sealing sleeve to the solar cell module. There are two sealing sleeves. A sealing structure is set between the two sealing sleeves to fix the two sealing sleeves. The inner wall of the sealing structure is fixedly connected with sealant to improve the sealing effect between the sealing sleeves and between the sealing sleeve and the solar cell module.

[0040] The fourth workbench automatic line is equipped with a vacuum system and a curing device on both sides. The vacuum system extracts gas from the solar panel assembly through a suction pipe. The curing device is used to cure the colloid in the solar panel assembly. Under the suction of the vacuum system, the pressure of the solar panel assembly changes from atmospheric pressure to 1.5 MPa, and the suction time is 50-80 minutes, which can extract gas from the solar panel assembly and reduce the gas pressure. The vacuum system holds pressure for 15-30 minutes to maintain a constant gas pressure in the solar panel assembly and maintain the melting rate of the colloid. The vacuum system depressurizes for 20-40 minutes to slowly increase the gas pressure in the solar panel assembly. The curing temperature of the curing device is 100-150 degrees Celsius, and the heating time is 50-80 minutes to slowly heat the colloid in the solar panel assembly and promote the melting of the colloid. The heat holding time of the curing device is 15-30 minutes to facilitate the melting of all the colloid in the solar panel assembly. The cooling time of the curing device is 20-40 minutes to lower the temperature of the solar panel assembly to room temperature, allowing the colloid in the solar panel assembly to cool down, thus completing the fixation of various structures in the solar panel assembly.

[0041] The automated unloading line is used to transfer the cooled solar cell modules out.

[0042] The packaging process includes the following steps:

[0043] S1: Place the solar cell module on the automatic feeding line with the back panel of the solar cell module facing upwards. The automatic feeding line supports the solar cell module, so that the solar cell module is suspended around its perimeter, making it easy to fit a sealing sleeve around the solar cell module.

[0044] S2: The automatic feeding line will transport the solar cell module to the first workbench automatic line. The drilling device will drill holes in the back plate of the solar cell module, so that the back plate of the solar cell module is provided with mounting holes. A support structure is provided on the lower side of the solar cell module and directly below the mounting holes.

[0045] S3: The first workbench automatic line transports the solar cell module to the second workbench automatic line. After the gluing device applies fixing glue in the mounting hole, the placement device places sealing sleeves on both sides of the solar cell module and places junction boxes in the mounting hole to output the electrical energy converted by the solar cell module.

[0046] S4: The second automated workbench transports the solar cell modules to the third automated workbench. The solar cell modules are no longer suspended in mid-air, reducing the pressure on them under the pressing device. The pressing device presses down on the sealing sleeves and junction boxes, improving the connection between the sealing sleeves and the solar cell modules. The heating device preheats the solar cell modules, initially melting the EVA colloid, and then fixing the sealing sleeves to each other and to the solar cell modules.

[0047] S5: The third workbench automatic line transports the solar cell module to the fourth workbench automatic line. The vacuum system extracts the gas from the solar cell module through the suction pipe. The curing device cures the colloid in the solar cell module. After curing, the curing device slowly cools the solar cell and the colloid.

[0048] S6: The fourth workbench automatic line transports the solar cell modules to the discharge automatic line.

[0049] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A solar cell module encapsulation process, characterized in that: Includes the following steps: S1: Place the solar cell module on the automatic feeding line with the back panel of the solar cell module facing upwards. The automatic feeding line supports the solar cell module, so that the solar cell module is suspended in the air around its sides. S2: The automatic feeding line will transport the solar cell modules to the first workbench automatic line, and the drilling device will drill holes in the back sheet of the solar cell modules, so that mounting holes are provided on the back sheet of the solar cell modules. S3: The first workbench automatic line transports the solar panel to the second workbench automatic line. After the gluing device applies fixing glue in the mounting hole, the placement device places sealing sleeves on both sides of the solar panel and places junction boxes in the mounting hole. S4: The second workbench automatic line transports the solar cell module to the third workbench automatic line. The solar cell module is no longer suspended in the air. The pressing device presses the sealing sleeve and junction box, and the heating device preheats the solar cell module. S5: The third workbench automatic line transports the solar cell module to the fourth workbench automatic line. The vacuum system extracts the gas from the solar cell module through the suction pipe. The curing device cures the colloid in the solar cell module. After curing, the curing device slowly cools the solar cell. S6: The fourth workbench automatic line transports the solar cell modules to the discharge automatic line.

2. The encapsulation process for a solar cell module according to claim 1, characterized in that: The mounting hole mates with the junction box, and an EVA film is fixedly connected to the lower side wall of the junction box.

3. The encapsulation process for a solar cell module according to claim 1, characterized in that: Each of the sealing sleeves is provided with an air extraction pipe on one side, and an EVA film is fixedly connected to the inner wall of the sealing sleeve.

4. The encapsulation process for a solar cell module according to claim 1, characterized in that: The fixing adhesive is a component bonding and fixing adhesive.

5. The encapsulation process for a solar cell module according to claim 1, characterized in that: Two sealing sleeves are provided, and a sealing structure is provided between the two sealing sleeves. The inner sidewall of the sealing structure is fixedly connected with sealant.

6. The encapsulation process for a solar cell module according to claim 1, characterized in that: The heating temperature of the heating device is 80 degrees Celsius to 120 degrees Celsius.

7. The encapsulation process for a solar cell module according to claim 1, characterized in that: Under the suction of the vacuum system, the pressure of the solar cell module varies from atmospheric pressure to 1.5 MPa. The suction time is 50 to 80 minutes, the pressure holding time of the vacuum system is 15 to 30 minutes, and the pressure release time of the vacuum system is 20 to 40 minutes.

8. The encapsulation process for a solar cell module according to claim 1, characterized in that: The curing temperature of the curing device is 100-150 degrees Celsius, the heating time is 50-80 minutes, the holding time of the curing device is 15-30 minutes, and the cooling time of the curing device is 20-40 minutes.

9. The encapsulation process for a solar cell module according to claim 1, characterized in that: The packaging is performed using packaging equipment, which includes an automatic feeding line, a first workbench automatic line, a second workbench automatic line, a third workbench automatic line, a fourth workbench automatic line, and an automatic discharging line connected in sequence. A punching device is installed on one side of the first workbench automatic line; The second workbench automatic line is equipped with a placement device and an adhesive application device on one side; The fourth workbench automatic line is equipped with a vacuum system and a curing device on both sides; the vacuum system can extract the gas from the solar panel assembly through the air extraction pipe, and the curing device is used to cure the colloid in the solar panel assembly. The automated discharge line is used to transfer the cooled solar cell modules out.

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