Autoclave system for manufacturing double-glass photovoltaic module

Abstract

The utility model discloses an autoclave system for manufacturing a double-glass photovoltaic module, which comprises an autoclave body, a vacuum-pumping system and an airflow stirring system, the vacuum-pumping system comprises a vacuum pump, a main pipeline and a first main pipeline, the main pipeline penetrates through the wall of the autoclave body and is respectively communicated with the vacuum pump and the first main pipeline, and the first main pipeline is communicated with the vacuum pump. A main pipeline valve is arranged on the main pipeline, a plurality of first branch pipelines are arranged on the first main pipeline in parallel, and a first branch pipeline valve is arranged on each first branch pipeline; a track is arranged in the kettle body, a plurality of glass rack cars can be placed on the track, a second main pipeline is arranged on each glass rack car, a plurality of second branch pipelines are arranged on the second main pipeline in parallel, each second branch pipeline can be connected with a vacuum bag, a second branch pipeline valve is arranged on each second branch pipeline, and a second pipeline valve is arranged on each second branch pipeline. And the second main pipeline is connected with the first branch pipeline through a movable pipeline. According to the system, the yield and the production efficiency of double-glass photovoltaic module manufacturing are obviously improved.

Description

Technical Field

[0001] The utility model specifically relates to an autoclave system for manufacturing double-glass photovoltaic modules, belonging to the technical field of autoclave equipment. Background Art

[0002] The manufacturing process of traditional laminated glass components for buildings is as follows: A layer of film (usually PVB film) is sandwiched between two pieces of glass for laminating, and then the laminated piece is sent into a roller press. The roller press has a certain heating function and two rotating rubber rollers. After the laminated piece is preheated to soften the film, it enters the gap between the two rubber rollers. Through the extrusion of the rubber rollers, the two pieces of glass are preliminarily bonded by the film to complete pre-pressing. Then, multiple pre-pressed pieces are placed at intervals and sent into an autoclave for secondary pressing under high temperature and high pressure to obtain the laminated glass component. The structure of the double-glass photovoltaic module is similar to that of the laminated glass component, but the difference is that photovoltaic cells, especially crystalline silicon cells, need to be integrated between two pieces of glass, so that the traditional laminated glass component has the function of photovoltaic power generation. Because the crystalline silicon cells are very thin and brittle and are easily pressed and broken in the roller press, the traditional roller press pre-pressing cannot be used, and the vacuum bag process needs to be used for pre-pressing. The traditional vacuum bag process is usually completed in an oven, and the production efficiency is relatively low. The film usually uses EVA material, and due to the small pressure generated by vacuum pumping in the oven, the bonding performance of the film to the glass is not very good. Therefore, it is necessary to design an autoclave system suitable for manufacturing double-glass photovoltaic modules. Summary of the Invention

[0003] In view of the problems existing in the prior art, the utility model provides an autoclave system for manufacturing double-glass photovoltaic modules.

[0004] The technical solution adopted by the utility model is as follows:

[0005] An autoclave system for manufacturing double-glass photovoltaic modules includes an autoclave body and a vacuum pumping system. The vacuum pumping system includes a vacuum pump, a main pipeline, and a first main pipeline. The vacuum pump is located outside the autoclave body, and the first main pipeline is located inside the autoclave body. The main pipeline passes through the autoclave wall and is respectively connected to the vacuum pump and the first main pipeline. A main pipeline valve is provided on the main pipeline. A plurality of first branch pipelines are arranged in parallel on the first main pipeline, and a first branch pipeline valve is provided on each first branch pipeline. A track is provided inside the autoclave body, and a plurality of glass trolleys can be placed on the track. A second main pipeline is installed on each glass trolley. A plurality of second branch pipelines are arranged in parallel on the second main pipeline. Each second branch pipeline can be connected to a vacuum bag containing a double-glass photovoltaic module. A second branch pipeline valve is provided on each second branch pipeline. The second main pipeline is connected to the first branch pipeline through a movable pipeline.

[0006] Further, the glass rack truck includes a chassis, with wheels provided below the chassis. The wheels can roll along the track. An upright frame is provided in the middle of the chassis, and multiple rows of horizontal through-holes are provided on the upright frame. One support rod can be inserted into each through-hole. Multiple support rods are arranged in each row of horizontal through-holes, and the support rods are symmetrically distributed about the left and right of the upright frame. The horizontal and vertical spacings between adjacent support rods can be adjusted according to the glass size. Vacuum bags containing double-glass photovoltaic modules can be placed on the support rods.

[0007] Further, the autoclave system further includes an air flow stirring system. The air flow stirring system is located at the tail of the kettle body and includes a stirring motor, an impeller box, an air inlet pipe, and multiple air outlet pipes. The motor is located outside the kettle body, and the impeller box is located inside the kettle body. The air inlet pipe and the air outlet pipes are both connected to the impeller box. The air inlet pipe is located at the top of the kettle body and extends along the length direction of the kettle body. Multiple air inlet holes are provided on the air inlet pipe, and the number of air inlet holes gradually decreases from the kettle door to the kettle tail. The multiple air outlet pipes are all flat-shaped and are arranged in layers from bottom to top, and the height of the air outlet pipes gradually decreases from bottom to top.

[0008] Beneficial effects: The glass rack truck designed by the present utility model can place multiple double-glass photovoltaic modules sleeved with vacuum bags. By setting up the cooperation of the vacuum pumping system and the glass rack truck to pump the vacuum bag, the cold vacuum pumping and hot vacuum pumping processes of a conventional oven can be realized. At the same time, high-pressure compressed air can be filled into the autoclave to increase the bonding pressure on the double-glass module, which is suitable for both flat glass and curved glass and will not cause the fragmentation of the battery chips during the processing. Coupled with the air flow stirring system, the temperature uniformity in the kettle is improved, significantly enhancing the yield and production efficiency of the double-glass photovoltaic module. Description of the Drawings

[0009] Figure 1 is a schematic diagram of the autoclave system.

[0010] Figure 2 is Figure 1 the AA cross-sectional view in

[0011] Figure 3 is a three-dimensional schematic diagram of the glass rack truck.

[0012] Figure 4 is a front view of the glass rack truck.

[0013] Figure 5 is a schematic diagram of the vacuum pumping system.

[0014] Figure 6 is a schematic diagram of the support rod supporting the vacuum bag.

[0015] Markings in the figure: 1 kettle body, 2 vacuum system, 3 glass frame car, 4 vacuum bag, 5 laminated parts, 6 stirring motor, 7 impeller box, 8 air inlet pipe, 9 air outlet pipe, 10 heating component, 11 guide rail, 12 kettle door, 13 air inlet, 21 vacuum pump, 22 main pipeline, 23 first main pipeline, 24 first branch pipeline, 25 movable pipeline, 31 base frame, 32 vertical frame, 33 through hole, 34 support rod, 35 second main pipeline, 36 second branch pipeline, 38 wheel, 41 exhaust valve, 221 main pipeline valve, 241 first branch pipeline valve, 361 second pipeline valve. DETAILED DESCRIPTION

[0016] The present invention will be described in detail below with reference to the accompanying drawings.

[0017] like Figure 1-2 As shown, a high-pressure autoclave system for manufacturing double-glass photovoltaic modules includes a high-pressure autoclave body 1, a vacuum system 2, and an air flow stirring system. The autoclave body 1 is generally in a horizontal cylindrical shape. A door 12 is provided on the autoclave body 1. When the door 12 is closed, the autoclave becomes a closed system. An air inlet 13 is provided on the autoclave body. The air inlet is connected to an external air compressor to pressurize the autoclave so that the pressure inside the autoclave can reach up to 15 atmospheres. Two rails 11 are also provided in the autoclave. Multiple glass racks 3 can be placed on the rails 11. The glass racks are as follows: Figure 3-4 As shown, the glass carriage includes a base frame 31, and wheels 38 are provided below the base frame 31. The wheels 38 can roll along the track 11 to facilitate the glass carriage to enter and exit the autoclave. A vertical frame 32 is provided in the middle of the base frame 31, and multiple rows of horizontal through holes 33 are provided on the vertical frame 32. Each through hole 33 allows a support rod 34 to be inserted. Multiple support rods are passed through each row of horizontal through holes. The support rods 34 are symmetrically distributed about the base frame 32. The horizontal and vertical spacing between adjacent support rods can be adjusted according to the size of the glass. The vacuum bag 4 containing the double-glass photovoltaic module can be placed on the support rod. The glass used in the double-glass photovoltaic module can be flat glass or curved glass. Figure 6 Schematic diagram showing a vacuum bag 4 containing a curved glass laminate 5 supported by support rods.

[0018] like Figure 5As shown in the figure, the vacuum pumping system 2 includes a vacuum pump 21, a main pipeline 22, and a first main pipeline 23. The vacuum pump 21 is located outside the kettle body, and the first main pipeline 23 is located inside the kettle body. The main pipeline 22 passes through the kettle body wall and is respectively connected to the vacuum pump 21 and the first main pipeline 23. A main pipeline valve 221 is provided on the main pipeline 22. A plurality of first branch pipelines 24 are arranged in parallel on the first main pipeline 23, and a first branch pipeline valve 241 is provided on each first branch pipeline 24; A second main pipeline 35 is installed on each glass trolley. A plurality of second branch pipelines 36 are arranged in parallel on the second main pipeline 35. Each second branch pipeline 36 can be connected to a vacuum bag 4 containing a laminated component or a double-glass photovoltaic module. A second branch pipeline valve 361 is provided on each second branch pipeline 36. The second main pipeline 35 is connected to the first branch pipeline 24 through a movable pipeline 25. In this way, the vacuum pump can evacuate multiple vacuum bags simultaneously, and the corresponding valves of the pipelines that are not connected to the vacuum bags or do not need to be evacuated can be closed.

[0019] A heating component 10 is also provided in the kettle to heat the air in the kettle, and the maximum temperature can reach 150 degrees Celsius. In order to ensure the uniformity of the temperature in the kettle, the air flow stirring system in the kettle can be started, such as Figure 1 As shown in the figure, the air flow stirring system is located at the tail of the kettle body and includes a stirring motor 6, an impeller box 7, an air inlet pipe 8, and a plurality of air outlet pipes 9; The stirring motor 6 is located outside the kettle body 1, and the impeller box 9 is located inside the kettle body 1. The stirring motor drives the impeller in the impeller box to rotate to form air extraction and exhaust. The air inlet pipe 8 and the air outlet pipes 9 are both connected to the impeller box 7; The air inlet pipe 8 is located at the top of the kettle body and extends along the length direction of the kettle body. A plurality of air inlet holes are opened on the air inlet pipe 8, and the number of air inlet holes gradually decreases from the kettle door to the kettle tail; The plurality of air outlet pipes 9 are all flat and are arranged in layers from bottom to top, and the height of the air outlet pipes gradually decreases from bottom to top. Such an arrangement can make the air flow in the kettle circulate evenly and ensure the uniformity of the air temperature in the kettle.

[0020] The method steps for manufacturing a double-glass photovoltaic module using the above autoclave system are as follows:

[0021] The first step is laminating: Lay the front plate glass, the first adhesive film layer, and a plurality of battery strings on the platform in sequence, and perform series and parallel connections on the battery strings. Then cover the second adhesive film layer and the back plate glass on the battery strings, and align the front plate glass and the back plate glass to obtain the laminated component 5;

[0022] The second step is bagging: Put the above laminated component into the vacuum bag 4, seal the four sides of the vacuum bag, connect the air extraction valve 41 to an external vacuum pump for pre-evacuation for a certain period of time to make the vacuum bag press the laminated component; Then close the air extraction valve 41, disconnect the connection with the vacuum pump, transfer the vacuum bag containing the laminated component to the glass trolley, and use a support rod for horizontal support;

[0023] Step 3, feeding into the autoclave: Push the glass carrier truck carrying multiple vacuum bags into the autoclave, connect each vacuum bag 4 to a second branch pipe 36, and connect a second main pipe 35 to a first branch pipe 24 with a movable pipe 25; after connecting all the vacuum bags and the glass carrier truck, then turn on the vacuum pump 21, and successively open the main pipe valve 221, the first branch pipe valve 241, the second branch pipe valve 361 and the air extraction valve 41 on the vacuum bag to conduct secondary vacuum pumping on the vacuum bag for a certain period of cold pumping.

[0024] Step 4, heating up and pressurizing: After the above-mentioned cold pumping is completed, close the autoclave door to make the inside of the autoclave body a sealed system; then turn on the heating component 10 inside the autoclave to start heating while pumping vacuum. As the temperature inside the autoclave rises, the pressure inside the autoclave body will gradually increase. The pressure on the vacuum bag will exceed one atmosphere. The adhesive film of the laminate inside the vacuum bag will melt and release a small amount of gas after heating up. This part of the gas will be pumped away by the vacuum pump. When the temperature and pressure inside the autoclave reach a certain value, close the main pipe valve 221 to stop pumping vacuum. At the same time, compressed air can also be injected into the autoclave body until the pressure inside the autoclave reaches 10 - 12 atmospheres, and keep the temperature and pressure for a certain period. While keeping the temperature, the air flow stirring system can also be turned on to make the temperature inside the autoclave uniform. Finally, the air temperature inside the autoclave is reduced to below 40 degrees through circulating water heat exchange, then release the high pressure inside the autoclave, open the autoclave cover, remove the vacuum pumping connection pipeline, pull out the glass carrier truck, remove the vacuum bag, take out the laminated part after lamination, trim the edges and install the junction box to obtain the finished double-glass photovoltaic module. This method can apply a pressure of more than ten atmospheres between the front plate glass and the back plate glass. The adhesive film is preferably PVB, which has good adhesion to the glass. At the same time, the vacuum pumping and exhaust effect is good, there are fewer defects such as air bubbles in the photovoltaic module, and the production efficiency is relatively high; this method is not only applicable to the production of flat double-glass photovoltaic modules, but also applicable to the manufacture of double-glass photovoltaic modules, and has the characteristics of high production efficiency and high yield rate.

[0025] The embodiments of the present invention have been described above in conjunction with the accompanying drawings. However, the present invention is not limited to the above specific embodiments. The above specific embodiments are merely illustrative and not restrictive. Under the inspiration of the present invention, those of ordinary skill in the art can also make many forms without departing from the purpose of the present invention and the scope protected by the claims. All of these fall within the protection scope of the present invention.

Claims

1. An autoclave system for manufacturing double-glass photovoltaic modules, comprising an autoclave body and a vacuum system, characterized in that: The vacuuming system includes a vacuum pump, a main pipeline, and a first main pipeline. The vacuum pump is located outside the kettle body, and the first main pipeline is located inside the kettle body. The main pipeline passes through the wall of the kettle body and is respectively connected to the vacuum pump and the first main pipeline. A main pipeline valve is provided on the main pipeline. Multiple first branch pipelines are arranged in parallel on the first main pipeline, and each first branch pipeline is provided with a first pipeline valve; a track is provided in the kettle body, and multiple glass frame carts can be placed on the track. A second main pipeline is installed on each glass frame cart, and multiple second branch pipelines are arranged in parallel on the second main pipeline. Each second branch pipeline can be connected to a vacuum bag with a double-glass photovoltaic module inside. Each second branch pipeline is provided with a second branch pipeline valve. The second main pipeline is connected to the first pipeline through a movable pipeline.

2. The autoclave system for manufacturing double-glass photovoltaic modules according to claim 1, wherein, The glass frame vehicle includes a base frame, wheels are provided under the base frame, the wheels can roll along the track, a vertical frame is provided in the middle of the base frame, multiple rows of horizontal through holes are provided on the vertical frame, each through hole allows a support rod to be inserted, multiple support rods are passed through each row of horizontal through holes, the support rods are symmetrically distributed about the base frame, the horizontal and vertical spacings of adjacent support rods can be adjusted according to the size of the glass, and vacuum bags with double-glass photovoltaic modules inside can be placed on the support rods.

3. The autoclave system for manufacturing double-glass photovoltaic modules according to claim 1, characterized in that: The autoclave system also includes an air flow stirring system, which is located at the rear of the autoclave body and includes a stirring motor, an impeller box, an air inlet pipe, and multiple air outlet pipes; the motor is located outside the autoclave body, the impeller box is located inside the autoclave body, and the air inlet pipe and the air outlet pipe are both connected to the impeller box; the air inlet pipe is located at the top of the autoclave body and extends along the length of the autoclave body, and multiple air inlet holes are opened on the air inlet pipe, and the number of air inlet holes gradually decreases from the autoclave door to the autoclave tail; the multiple air outlet pipes are all flat, arranged in layers from bottom to top, and the height of the air outlet pipes gradually decreases from bottom to top.

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