What are the application scenarios of high temperature adhesive tape in the field of new energy photovoltaic?
With the characteristics of high temperature resistance, weather resistance, insulation and stable adhesion, the application of high-temperature adhesive tape in the field of new energy photovoltaic runs through the whole process of photovoltaic module production, processing, packaging, installation and operation and maintenance, covering many core processes from semi-finished products to finished products of batteries, and adapting to the auxiliary protection requirements after outdoor installation. It is an important auxiliary material in photovoltaic manufacturing and application. The core application scenarios are mainly divided into the following categories:
1. Positioning and Fixing of the Core Process of Photovoltaic Module Production
This is the main application scenario of high-temperature adhesive tape, which adapts to the high-temperature process requirements in production. It is used for temporary positioning and fixing of bus bar and welding belt in the process of welding and stacking battery pieces, to prevent the welding belt from deviating and falling off during welding and transportation, and to ensure the accuracy of series connection of battery pieces; Before the lamination process, all kinds of circuits, gaskets and frame accessories in the module are bonded and fixed. The adhesive tape can keep stable shape without melting and degumming under the lamination high temperature and high pressure environment of 130℃-180℃. After the lamination, some removable adhesive tapes can peel off without residual adhesive, which does not affect the subsequent adhesion of the substrate. In addition, it can also be used for the temporary fixing of semi-finished parts in the processing links such as cutting and polishing of components to avoid the displacement of parts during processing.
Second, the photovoltaic module electrical insulation and isolation protection
It meets the electrical safety requirements of photovoltaic modules and is used for insulation treatment inside modules and wiring parts. Insulate and wrap the exposed metal circuit and copper foil at the series and parallel connection of battery pieces to prevent current leakage and short circuit of the circuit; Inside the assembly junction box, the connection parts of terminals and wires are insulated and isolated to avoid arc problems caused by poor contact; At the same time, at the joint between the aluminum alloy frame and the back plate of the module, high-temperature adhesive tape is used as auxiliary insulation to block the conductive contact between the frame and the internal circuit, thus ensuring the electrical safety performance of the module in all directions.
Three, photovoltaic module production and processing of shielding protection
It is used for precise shielding protection in the processes of surface treatment, coating and printing of photovoltaic modules. For example, in the coating process of battery chips and photovoltaic glass, high-temperature adhesive tapes are applied to areas that do not need to be coated to prevent the coating layer from adhering; When spraying and screen-printing the logo on the component frame, cover the non-spraying/screen-printing area with adhesive tape to ensure the appearance process accuracy; At the same time, in the process of polishing and cleaning components, sensitive electrical components and circuits are protected by adhesive tape to avoid being damaged by abrasives and cleaning agents, and there is no residual adhesive after the adhesive tape is peeled off, which does not affect the surface cleanliness of components.
Fourth, outdoor installation and splicing assistance of photovoltaic modules
Adapted to the complex working conditions of outdoor installation of photovoltaic modules, used for splicing, sealing and auxiliary fixing of finished modules. When building a photovoltaic array, auxiliary sealing is made for the splicing gaps of adjacent modules, and the waterproof and dustproof effects of the gaps are improved with sealant, so as to prevent rainwater and dust from infiltrating and affecting the internal performance of modules; In the fixing link between the module and the photovoltaic bracket, some adhesive tapes with high temperature resistance and high adhesion can be used as auxiliary materials to enhance the fit between the module and the bracket and alleviate the looseness of the fixing parts caused by environmental vibration; In addition, in the installation process, the exposed terminals and interfaces of the components shall be temporarily covered and protected to avoid being bumped and polluted by dust during installation.
Five, photovoltaic module operation and maintenance and repair protection
In the later detection, repair and maintenance of photovoltaic modules, it plays a temporary protection and positioning role. After outdoor service, if the components need to be repaired on site (such as replacing junction boxes and repairing lines), the lines and components around the repair area should be shielded with high-temperature adhesive tape to prevent secondary damage caused by the repair operation; In the lamination repair process of laboratory testing and returning to the factory for maintenance, the reassembled battery cells and welding strips are temporarily positioned to ensure the repair accuracy, and the tape can adapt to the secondary high-temperature lamination process in repair without affecting the repair quality.
