Novel solar thermoelectric integrated PVT assembly processing method

Abstract

The invention relates to a novel solar thermoelectricity integrated PVT assembly processing method, which is characterized in that a solar thermoelectricity integrated PVT assembly is processed by using an existing photovoltaic assembly, and a frameless solar photovoltaic assembly and a heat exchange body are laminated and combined to form a semi-finished PVT assembly; through two detection and two repair processes of the frameless photovoltaic module and the heat exchange body, process abnormity can be quickly found, batch defective products are prevented from flowing into subsequent processes, EL detection is performed again after lamination, the EL badness of the semi-finished PVT module is quickly and accurately detected, the finished product yield of the PVT module is greatly improved, a heat insulation plate, a back plate, a frame and a battery box are mounted on qualified products, and the production efficiency is improved. And finally, the heat exchange body is filled with protective gas, and the assembly is cured to form a PVT assembly product. The solar PVT module manufacturing technology is carried out on the basis of an existing solar photovoltaic module processing technology, the preorder processing procedures in the solar PVT module production process are reduced, and meanwhile a new way is provided for application of the photovoltaic module.

Description

Technical Field

[0001] The present invention relates to the technical field of solar photovoltaic and thermal comprehensive utilization, and in particular to a novel solar thermal power integrated PVT component processing method. Background Art

[0002] Solar energy is a high-quality, clean, renewable energy source. Compared with traditional fossil energy, the efficient and deep development and utilization of solar energy resources is an effective way to solve the problems of energy shortage and environmental pollution. At present, photovoltaic power generation and solar thermal technology are widely used in the construction field. However, the existing solar thermal utilization and photovoltaic power generation technologies have a single production capacity function of the components and low energy conversion efficiency of the system, which cannot meet the requirements of buildings to better utilize photovoltaic and solar thermal systems in a limited area.

[0003] In recent years, more and more research has been conducted on the integrated technology of solar photovoltaic and photothermal. The integrated technology of solar photovoltaic and photothermal is a solar energy utilization technology that integrates photovoltaic power generation and low-temperature heat utilization. It integrates traditional photothermal components with photovoltaic components to form a PVT component, realizing cogeneration of heat and power on the same component. By laying fluid channels on the back of the photovoltaic component, the heat generated by the battery cell is taken away, the temperature of the battery cell is reduced to improve the photoelectric conversion efficiency of the photovoltaic component, and the dissipated heat is effectively collected and utilized, thereby improving the comprehensive utilization efficiency of solar energy.

[0004] The existing domestic solar photovoltaic module production technology is relatively mature and complete. It can be used to process existing photovoltaic modules into solar PVT modules to reduce the pre-processing procedures in the production process of solar PVT modules, and at the same time provide a new way for the application of photovoltaic modules. Summary of the invention

[0005] In view of the above problems, the present invention proposes a novel method for processing a solar thermal power integrated PVT component, which utilizes existing photovoltaic components to process the solar thermal power integrated PVT component.

[0006] To achieve the above objectives, the following technical solution is adopted: A novel solar thermal power integrated PVT component processing method comprises the following steps:

[0007] S1. Perform appearance and EL inspection on frameless photovoltaic modules, repair defective products, and re-test appearance and EL after repair;

[0008] S2. Qualified frameless photovoltaic modules are coated with adhesive according to the size of their back panels;

[0009] S3. Perform appearance inspection and pressure test on the heat exchanger. Repair defective products and re-perform appearance inspection and pressure test after repair;

[0010] S4. The qualified heat exchanger is laid on the film of the frameless photovoltaic module;

[0011] S5. The frameless photovoltaic modules after laying are laminated to form semi-finished PVT modules;

[0012] S6. Perform secondary EL testing on semi-finished PVT components, repair defective products, and re-perform secondary EL testing after repair;

[0013] S7. Install insulation board, backboard and frame on qualified products;

[0014] S8. Install battery boxes on qualified products and conduct insulation resistance test, DC withstand voltage test and power test;

[0015] S9. Fill the heat exchanger in the qualified product with protective gas and solidify the component to finally form a PVT component product.

[0016] A further technical solution is that the melting point of the adhesive film described in step S2 is 10-20° C. lower than the melting point of the EVA adhesive film in the frameless photovoltaic module.

[0017] A further technical solution is that, according to the processing method according to claim 2, it is characterized in that the lamination process of step S3 is completed in a double-chamber lamination equipment, and the process includes a first lamination stage, a second lamination stage and a third lamination stage. The lamination temperatures of the three stages are all the melting point temperature of the adhesive film. In the first lamination stage, the pressure of the upper and lower chambers in the double-chamber lamination equipment is maintained at -0.1MPa for 6 minutes; in the second lamination stage, the pressure of the upper chamber in the double-chamber lamination equipment is adjusted from -0.1MPa to 0.1MPa, and the pressure of the lower chamber is maintained at -0.1MPa for 4 minutes; in the first lamination stage of the second lamination stage, the pressure of the upper chamber in the double-chamber lamination equipment is maintained at 0.1MPa, and the pressure of the lower chamber is maintained at -0.1MPa for 4 minutes.

[0018] A further technical solution is that in step S5, the semi-finished PVT component, the insulation board, the backboard and the frame are bonded together by adhesive, and the adhesive is a silicone adhesive that cures at room temperature.

[0019] A further technical solution is that the protective gas filled in step S7 is nitrogen, and the filling gas pressure is less than 0.5 MPa.

[0020] A further technical solution is that the size of the heat exchanger is the same as the size of the film.

[0021] A further technical solution is that the heat exchanger is made of brazed aluminum plates, stainless steel plates or copper plates.

[0022] A further technical solution is that the heat exchanger can be a single-sided inflation type flow channel structure or a double-sided inflation type flow channel structure, and the flow channels are arranged in a honeycomb, serpentine or mesh shape.

[0023] A further technical solution is to spray epoxy resin with a thickness of 60-100 μm on the surface of the heat exchanger.

[0024] Beneficial effects of the present invention: The present invention conducts solar PVT module manufacturing technology based on the existing solar photovoltaic module processing technology, reduces the pre-processing procedures in the production process of solar PVT modules, and provides a new way for the application of photovoltaic modules. The present invention combines the frameless solar photovoltaic module with the heat exchanger through lamination to form a solar PVT module. Through two inspections of the frameless photovoltaic module and the heat exchanger and two repair processes, process abnormalities can be quickly discovered to prevent batch defective products from flowing into subsequent processes. After lamination, EL inspection is performed again to quickly and accurately detect EL defects of semi-finished PVT modules, greatly improving the finished product yield of PVT modules, thereby reducing the batch production cost of PVT modules and improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a process flow chart of the processing method of the present invention;

[0026] Figure 2 It is a hierarchical structure of a solar thermal power integrated PVT component.

[0027] As shown in the figure: 1. Film layer; 2. Film layer; 3. Heat exchanger layer; 4. First coating layer; 5. Insulation layer; 6. Second coating layer; 7. Backboard layer; 101. Glass layer 101; 103. Photovoltaic cell layer; 104. TPT backboard; 1021. First film layer; 1022. Second film layer. DETAILED DESCRIPTION

[0028] The present invention is further described below in conjunction with embodiments. The description of the following embodiments is only used to help understand the present invention. It should be noted that for ordinary persons in the art, without departing from the principle of the present invention, the present invention can also be modified in some ways, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

[0029] Example 1

[0030] This embodiment processes a solar thermal power integrated PVT component hierarchical structure, such as Figure 2As shown, it includes a frameless photovoltaic module layer 1, a film layer 2, a heat exchanger layer 3, a first adhesive layer 4, a thermal insulation layer 5, a second adhesive layer 6, and a backboard layer 7, wherein the size of the heat exchanger is the same as the size of the film, and after the layers are stacked and the battery box and the frame are installed, a solar PVT module product is formed. The frameless photovoltaic module adopts an existing solar frameless photovoltaic module, and the hierarchical structure of the module includes a glass layer 101, a first film layer 1021, a photovoltaic cell layer 103, a second film layer 1022 and a TPT backboard 104. The EVA film used in the first film layer 1021 and the second film layer 1022 of the frameless photovoltaic module selected in this example has a melting point of 140°C, so the film used in the film layer of the solar PVT module in this example is higher than the first film layer 1021 and the second film layer 1022. The melting point of the EVA film used in the film layer 1022 is 10-20°C lower than that in the lamination process to ensure that the first film layer 1021 and the second film layer 1022 of the solar PVT component in this example will not melt; the heat exchanger used in this example can be made of brazed aluminum plate or stainless steel plate or copper plate, and can adopt a single-sided inflatable flow channel structure or a double-sided inflatable flow channel structure. The flow channels are arranged in a honeycomb, serpentine or mesh shape, and the surface of the heat exchanger is sprayed with epoxy resin with a thickness of 60-100μm.

[0031] The following describes a novel solar thermal power integrated PVT assembly processing method, the specific steps of which include:

[0032] S1. The frameless photovoltaic module is transferred to the assembly line workbench at the loading station, and the frameless photovoltaic module TPT backplane 104 is transported to the EL testing equipment with the face upward. When a poor appearance or poor EL is detected, the defective product is transferred to the rework station for rework. After rework, the appearance inspection and EL inspection process are repeated, and the qualified products are transferred to the film cutting and loading station;

[0033] S2. When the film cutting and feeding station receives the frameless photovoltaic module, the film is fed according to the size of the frameless photovoltaic module TPT backplane 104, and the film is applied on the frameless photovoltaic module TPT backplane 104;

[0034] S3. At the loading station, the heat exchanger is transported to the heat exchanger inspection workstation for appearance inspection and pressure test. If poor appearance and poor pressure are detected, the defective products are sent to the rework station for rework. After rework, the appearance inspection and pressure test are carried out again. The qualified products are sent to the film cutting and loading station;

[0035] S4. When the film cutting and feeding station receives the heat exchanger, the heat exchanger is laid on the film of the TPT backsheet 104 of the frameless photovoltaic module;

[0036] S5. The frameless photovoltaic modules after laying are transported to the lamination station for lamination. The lamination station adopts double-chamber lamination equipment. The lamination process includes the first lamination stage, the second lamination stage and the third lamination stage. The lamination temperature of the three stages is controlled at 120-130°C. In the first lamination stage, the pressure of the upper and lower chambers of the double-chamber lamination equipment is maintained at -0.1MPa for 6 minutes; in the second lamination stage, the pressure of the upper chamber of the double-chamber lamination equipment is adjusted from -0.1MPa to 0.1MPa, and the pressure of the lower chamber is maintained at -0.1MPa for 4 minutes; in the second lamination stage, the pressure of the upper chamber of the double-chamber lamination equipment is maintained at 0.1MPa, and the pressure of the lower chamber is maintained at -0.1MPa for 4 minutes. After the three lamination stages are completed, the semi-finished PVT modules are formed;

[0037] S6. The semi-finished PVT components are transferred to the secondary EL inspection station for secondary EL inspection. When poor appearance or poor EL is detected, the defective products are transferred to the rework station for rework. After rework, the secondary EL inspection process is repeated, and qualified products are transferred to the glue coating station;

[0038] S7. At the gluing station, the insulation board is glued to the heat exchanger of the semi-finished PVT assembly, and the back plate is glued to the insulation board, and then the semi-finished PVT assembly is transferred to the gluing frame station, and the outer frame of the semi-finished PVT assembly is glued and the frame is installed. After completion, the semi-finished PVT assembly is transferred to the battery box station;

[0039] S8. Install battery boxes on semi-finished PVT modules, and perform insulation resistance test, DC withstand voltage test and power test. Semi-finished PVT modules that pass the test are transferred to the gas filling station;

[0040] S9. Fill the heat exchanger of the semi-finished PVT component with nitrogen as a protective gas, the gas pressure of which is less than 0.5 MPa, and solidify the component to finally form a PVT component product.

[0041] in,

[0042] In step S1, the appearance of the frameless photovoltaic module is inspected to see if the outer surface is clean and tidy, and whether the glass and back panel are damaged. Only products without abnormalities can be loaded.

[0043] In step S3, the pressure test requirement of the heat exchanger is that when the heat exchange medium is water or antifreeze, the heat exchanger pressure test is not less than 1.7MPa; when the heat exchange medium is refrigerant, the heat exchanger pressure test is not less than 2.5MPa. In addition, when the working medium in the heat exchanger is refrigerant, the first coating layer 4 and the insulation layer 5 are omitted in the hierarchical structure of the PVT component, and the refrigerant type solar PVT component does not need insulation.

[0044] In steps S1 and S6, the EL test determines that the criterion for judging qualified products is that the photovoltaic module cells have no hidden cracks, no fragments, no broken grids, no slip lines, no open welding and no bright and dark patches, and the cells are arranged evenly without misalignment. When the first EL test is performed, the component code is collected and transmitted to the production management operating system; the two EL tests are both coded and marked for the components with poor detection, and the component image is obtained during the test and sent to the production management operating system. The production management system transmits the repair information to the corresponding repair station according to the repair plan. The repair information includes but is not limited to: component code, component image, repair method information, etc.

[0045] In step S5, after lamination and processing, a semi-finished PVT module is formed, the bonding strength between the adhesive film and the frameless photovoltaic module is ≥30N / cm, the bonding strength between the adhesive film and the heat exchanger is ≥40N / cm, and the cross-linking degree of the adhesive film after lamination is ≥80%.

[0046] In step S7, the frame gluing requirements are as follows: the allowable difference between the two diagonals of the frame is within 3‰ of the theoretical diagonal size, the external dimension tolerance is ±1mm, the frame arch is less than or equal to 0.8‰ of the frame length, the frame gluing amount is ≥ 1 / 2 of the groove depth, the end face glue gap length is ≤5mm, there is no silicone overflow on the front of the component, the back glue overflow is uniform, there is no glue flower or glue shortage, and the depth of glue shortage on the front of the component is ≤2mm.

[0047] In step S8, the installation requirements of the battery box are that the battery box is firmly bonded and straight, the polarity mark is correct, the lead plug is firmly connected to the socket, plugged in place or welded firmly, the box cover is tightly buckled with the box body, the rubber ring is not allowed to be exposed, the box cover is kept flush with the box body, and the box cover claws are not lifted or uneven, and the box cover cannot be opened by hand without the help of tools; the potting battery box glue completely covers the charged body inside the junction box and does not affect the buckle of the box cover, the surface of the potting glue is kept flat, free of bubbles, and unevenness is not allowed;

[0048] The test requirements for insulation resistance test, DC withstand voltage test and power test are as follows: the insulation resistance of the component should be no less than 40MΩ·m2, the leakage current ≤50μA, and a voltage of 1000V DC voltage plus twice the maximum system voltage should be applied between the positive and negative terminals of the component for 1 minute. The component should not have insulation breakdown or surface rupture. The power test IV tester obtains IV curve data through a data acquisition device, and uses computer software to analyze and process the data to evaluate whether the maximum power point of the component meets the requirements of qualified component products.

Claims

1. A novel solar thermal power integrated PVT component processing method, characterized in that: The following steps are included: S1. Perform appearance and EL inspection on frameless photovoltaic modules, repair defective products, and re-test appearance and EL after repair; S2. Qualified frameless photovoltaic modules are coated with adhesive according to the size of their back panels; S3. Perform appearance inspection and pressure test on the heat exchanger. Repair defective products and re-perform appearance inspection and pressure test after repair; S4. The qualified heat exchanger is laid on the film of the frameless photovoltaic module; S5. The frameless photovoltaic modules after laying are laminated to form semi-finished PVT modules; S6. Perform secondary EL testing on semi-finished PVT components, repair defective products, and re-perform secondary EL testing after repair; S7. Install insulation board, backboard and frame on qualified products; S8. Install battery boxes on qualified products and conduct insulation resistance test, DC withstand voltage test and power test; S9. Fill the heat exchanger in the qualified product with protective gas and solidify the component to finally form a PVT component product.

2. The processing method according to claim 1, characterized in that: The melting point of the adhesive film described in step S2 is 10-20° C. lower than the melting point of the EVA adhesive film in the frameless photovoltaic module.

3. The processing method according to claim 2, characterized in that: The lamination process in step S5 is completed in a double-chamber lamination device, and the process includes a first lamination stage, a second lamination stage and a third lamination stage. The lamination temperatures of the three stages are all the melting point of the adhesive film. In the first lamination stage, the pressure of the upper and lower chambers of the double-chamber lamination device is maintained at -0.1 MPa for 6 minutes. In the second lamination stage, the upper chamber pressure in the double-chamber lamination equipment was adjusted from -0.1MPa to 0.1MPa, and the lower chamber pressure was maintained at -0.1MPa for 4min; in the first lamination stage of the second lamination stage, the upper chamber pressure in the double-chamber lamination equipment was maintained at 0.1MPa, and the lower chamber pressure was maintained at -0.1MPa for 4min.

4. The processing method according to claim 3, characterized in that: In step S7, the semi-finished PVT assembly, the insulation board, the backboard and the frame are bonded together by adhesive, and the adhesive is a silicone adhesive that cures at room temperature.

5. The processing method according to claim 4, characterized in that: The protective gas filled in step S9 is nitrogen, and the filling gas pressure is less than 0.5 MPa.

6. The processing method according to any one of claims 1 to 5, characterized in that: The size of the heat exchanger is the same as that of the film.

7. The processing method according to any one of claim 6, characterized in that: The heat exchanger is made of brazed aluminum plates, stainless steel plates or copper plates.

8. The processing method according to any one of claim 7, characterized in that: The heat exchanger may be a single-sided inflation type flow channel structure or a double-sided inflation type flow channel structure, and the flow channels are arranged in a honeycomb, serpentine or mesh shape.

9. The processing method according to any one of claim 8, characterized in that: The heat exchanger surface is sprayed with epoxy resin with a thickness of 60-100 μm.

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