Flexible perovskite battery packaging method and battery assembly

Abstract

The invention discloses a flexible perovskite cell packaging method and assembly, and the method comprises the steps: providing a flexible front plate and a perovskite cell prefabricated on the flexible front plate, and carrying out the P4 edge cleaning of the perovskite cell, and enabling the area of the perovskite cell after edge cleaning to be smaller than the area of the flexible front plate; carrying out surface modification treatment on the edge cleaning area, and constructing a gully structure on the surface of the flexible front plate through laser processing; sequentially laminating and covering a glue film and a flexible back plate on the back surface of the perovskite cell; laminating treatment is carried out, under the action of heat and pressure, the adhesive film and the butyl rubber are melted, the flexible front plate, the adhesive film, the butyl rubber and the flexible back plate are bonded into a whole, and a preliminarily packaged laminated body is formed; and carrying out local hot working on the peripheral edge of the laminated body, and cooling to form a sealing edge. According to the flexible perovskite cell packaging method, perfect unification of high performance and low cost is realized through interface microstructure regulation and edge integrated hot melting sealing innovative processes.

Description

Technical Field

[0001] This invention belongs to the field of new energy and new materials technology, and relates to a flexible perovskite battery encapsulation method and battery module. Background Technology

[0002] Perovskite solar cells, as an emerging photovoltaic technology, have attracted widespread attention due to their advantages such as high photoelectric conversion efficiency, low material cost, and solution-processability. Among them, flexible perovskite cells, with their lightweight, bendability, and ease of transportation and installation, have shown great application potential in building-integrated semiconductors, wearable electronic devices, and portable power supplies.

[0003] However, perovskite materials are extremely sensitive to environmental factors such as water and oxygen, and their long-term stability is a key bottleneck restricting their commercial application. Therefore, efficient and reliable encapsulation technology is crucial to ensuring the lifespan of perovskite solar cells, especially flexible perovskite solar cells. Currently, mainstream encapsulation technologies rely on direct bonding between the encapsulation material and the substrate to form a water and oxygen barrier layer.

[0004] Traditional encapsulation methods pose significant challenges for flexible perovskite solar cells. Compared to rigid glass substrates, commonly used flexible polymer substrates are more chemically inert, resulting in generally poor adhesion to the aforementioned encapsulation materials. This weak interfacial adhesion easily leads to microscopic gaps or interfacial delamination during long-term use due to thermal stress and mechanical bending. When exposed to moisture, these weak interfaces readily become preferential channels for moisture diffusion, allowing moisture to penetrate the cell and cause irreversible damage such as perovskite material decomposition and electrode corrosion, ultimately leading to severe performance degradation or even cell failure.

[0005] To improve encapsulation reliability, more expensive encapsulation materials or more complex multilayer encapsulation structures are often considered. However, this undoubtedly increases material and manufacturing costs significantly, weakening the cost advantage of flexible perovskite solar cells. Therefore, how to effectively enhance the interfacial bonding and moisture barrier capabilities between the flexible substrate and the encapsulation material through simple and low-cost process improvements based on existing mature encapsulation material systems has become a pressing technical problem in this field. Summary of the Invention

[0006] The purpose of this invention is to solve the problem in the prior art of how to effectively enhance the interfacial bonding force and water vapor barrier capability between flexible substrate and encapsulation material through simple and low-cost process improvements based on existing mature encapsulation material systems, and to provide a flexible perovskite battery encapsulation method and battery module.

[0007] To achieve the above objectives, the present invention employs the following technical solution:

[0008] A flexible perovskite solar cell encapsulation method includes the following steps:

[0009] S1, a flexible front plate and a perovskite cell prefabricated thereon are provided. The perovskite cell is subjected to P4 edge cleaning treatment so that the area of ​​the perovskite cell after edge cleaning is smaller than the area of ​​the flexible front plate, thereby forming an annular edge cleaning area on the flexible front plate around the perovskite cell.

[0010] S2, Surface modification treatment is performed on the clearing area, and a groove structure is constructed on the surface of the flexible front plate in this area by laser processing to increase its surface roughness and contact area with the packaging material.

[0011] S3, an adhesive film and a flexible backplate are sequentially stacked on the back of the perovskite solar cell, wherein a ring of butyl rubber for sealing is laid between the outer periphery of the adhesive film and the flexible backplate, corresponding to the position of the edge clearing area.

[0012] S4, perform lamination process, under the action of heat and pressure, melt the adhesive film and butyl rubber, and bond the flexible front plate, adhesive film, butyl rubber and flexible back plate together to form a pre-encapsulated laminate;

[0013] S5, perform localized hot processing on the outer peripheral edge of the laminate, so that the flexible front plate and the flexible back plate can be directly hot-melted and mutually penetrated and fused in the reserved glue-free area, and after cooling, form a continuous, dense and interface-free integrated hot-melt sealing edge.

[0014] The flexible front panel is made of a flexible material and has bendable characteristics. It has a single-layer or multi-layer structure, and the material properties of its battery side layer are the same as those of the back panel material and have the property of hot melting. As the main carrier of the perovskite battery, it provides physical protection for the front of the perovskite battery and is bonded to the adhesive film and butyl rubber to seal the perovskite battery.

[0015] The flexible backsheet is made of a flexible material with bendable characteristics. It has a single-layer or multi-layer structure, and the material properties of its battery side layer are the same as those of the front panel material. It also has the property of being heat-melted, providing physical protection for the back of the battery and preventing physical damage to the back and environmental factors such as water and oxygen from directly affecting the adhesive film. The adhesive film and butyl rubber are bonded to the front panel to achieve a sealed and isolated battery.

[0016] The outer boundary of the grooved structure processing area in S2 is at least 1 mm away from the outer edge of the flexible front plate, so as to reserve a smooth area without groove processing for forming the hot melt sealing edge.

[0017] In S2, the surface modification process is completed simultaneously with the P4 edge cleaning process. Specifically, by adjusting the process parameters of the laser used for edge cleaning, including changing the laser mode from cutting mode to engraving mode, reducing the pulse frequency, increasing the number of scans, or reducing the scanning speed, the laser can etch the groove structure on the exposed flexible front plate surface while completing battery isolation.

[0018] The flexible front panel, at least its surface layer facing the battery, and the flexible back panel, at least its surface layer facing the battery, are made of the same thermoplastic polymer material; the polymer material is one of polyethylene terephthalate, polyethylene naphthalate, polyimide, or cyclic olefin copolymer.

[0019] The butyl rubber laid in S3 forms an outer contour that is at least 1.5 mm away from the outer edges of the flexible front plate and the flexible back plate, thereby defining the glue-free area at the edge of the laminate. This glue-free area is used to form the hot-melt sealing edge.

[0020] The localized hot processing in S5 employs a hot-press welding head, ultrasonic welding head, or near-infrared laser scanning device with precise temperature and pressure control. Its effective area is precisely limited to the adhesive-free area, and the temperature of the hot processing is controlled between the softening point and melting point of the surface material of the flexible front plate and flexible back plate, specifically between 150°C and 300°C. At the same time, a pressure of 0.1 to 1.0 MPa is applied for a duration of 1 to 10 seconds to ensure that the material is fully melted and bonded without thermal degradation.

[0021] The encapsulation film is a transparent insulating encapsulation film selected from one of ethylene-vinyl acetate copolymer, polyolefin elastomer, thermoplastic polyurethane, or polyvinyl butyral; the size of the encapsulation film is designed to completely cover the perovskite cell and extend outward to contact or partially overlap the inner edge of the butyl rubber.

[0022] After S5 is completed, the process also includes an inspection step: using a tensile tester to perform a 180° peel strength test on the hot-melt seal edge, the peel strength of which is not less than 5 N / cm; and / or, using a helium mass spectrometer to detect leaks in the packaged component, the water vapor permeability of which is less than .

[0023] A flexible perovskite solar cell encapsulation method and solar cell assembly, wherein the assembly is encapsulated by the method described in any of the preceding claims, and the assembly comprises:

[0024] The flexible front panel has grooves on the surface of its edge clearing area;

[0025] The perovskite solar cell is located in the middle of the flexible front panel;

[0026] A film is applied to the back of the perovskite solar cell and part of the edge cleaning area.

[0027] Butyl rubber is disposed around the periphery of the adhesive film;

[0028] A flexible back panel is bonded to the flexible front panel via the adhesive film and butyl rubber;

[0029] The hot-melt sealing edge is formed by directly hot-melting and bonding the edge areas of the flexible front plate and the flexible back plate.

[0030] Compared with the prior art, the present invention has the following beneficial effects:

[0031] The flexible perovskite solar cell encapsulation method of this invention achieves a perfect balance between high performance and low cost through two innovative processes: "interface microstructure control" and "integrated edge hot-melt sealing." First, in the standard P4 laser edge cleaning process, micro-groove structures are simultaneously constructed in the flexible front panel edge cleaning area by adjusting process parameters. This significantly increases the contact area and mechanical interlocking force between the encapsulation material and the substrate, thereby greatly enhancing the interfacial adhesion strength and effectively cutting off the diffusion channels for moisture penetration along the interface. Subsequently, a general-purpose thermal processing device is used to locally hot-melt the laminate edges, allowing the flexible front panel and back panel to directly fuse in the reserved area to form a dense, interface-free integrated sealing edge, constructing multiple protective barriers that surpass traditional encapsulation methods. Without introducing expensive new materials or high-precision equipment, and with only extremely low process modification costs, a qualitative leap in encapsulation reliability is achieved simultaneously. This significantly improves the module's moisture barrier capability and anti-bending delamination performance, as well as its excellent industrial feasibility. The process is simple, highly compatible with existing production lines, and provides a key technical solution for the large-scale commercial application of flexible perovskite solar cells. Attached Figure Description

[0032] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0033] Figure 1 These are before-and-after comparison images of the perovskite solar cell of the present invention before and after edge cleaning;

[0034] Figure 2 This is a planar structural diagram of the present invention;

[0035] Figure 3 This is a side view of the present invention;

[0036] Figure 4This is a structural diagram of the present invention after heat treatment;

[0037] Figure 5 This is a diagram of the packaging structure for existing technologies. Detailed Implementation

[0038] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, 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. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0039] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0040] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0041] The present invention will now be described in further detail with reference to the accompanying drawings:

[0042] See Figure 1 The images shown are before and after edge cleaning of the perovskite solar cell of the present invention. The flexible perovskite solar cell encapsulation method of the present invention specifically includes the following steps:

[0043] S1, a flexible front panel and a perovskite cell prefabricated thereon are provided. The perovskite cell is subjected to P4 edge cleaning treatment, so that the area of ​​the perovskite cell after edge cleaning is smaller than the area of ​​the flexible front panel, thereby forming an annular edge cleaning area on the flexible front panel around the perovskite cell.

[0044] The flexible front panel is made of a flexible material and has bendable characteristics. It has a single-layer or multi-layer structure, and the material properties of its battery side layer are the same as those of the back panel material and have the property of thermal melting. As the main carrier of the perovskite battery, it provides physical protection for the front of the perovskite battery and is bonded to the adhesive film and butyl rubber to seal the perovskite battery inside.

[0045] The flexible front panel, at least its surface layer facing the battery, and the flexible back panel, at least its surface layer facing the battery, are made of the same thermoplastic polymer material; the polymer material is one of polyethylene terephthalate, polyethylene naphthalate, polyimide, or cyclic olefin copolymer.

[0046] By constructing a micro-groove structure in the clearing area of ​​the flexible front panel, the effective contact area and mechanical interlocking capability between the encapsulation material and the substrate are greatly increased, resulting in a several-fold increase in interfacial bonding strength. This strong interfacial bond effectively eliminates micro-gaps caused by thermal expansion and contraction or bending deformation, fundamentally cutting off the preferred channels for water vapor to permeate along the interface.

[0047] S2, surface modification treatment is performed on the edge-cleaning area. A groove structure is constructed on the flexible front panel surface in this area using laser processing to increase its surface roughness and contact area with the encapsulation material. The outer boundary of the groove structure processing area in S2 maintains a distance of at least 1 mm from the outer edge of the flexible front panel to reserve a smooth area without groove processing for forming the heat-fused sealing edge. The surface modification treatment is completed simultaneously with the P4 edge-cleaning process. Specifically, by adjusting the process parameters of the laser used for edge cleaning, including changing the laser mode from cutting mode to engraving mode, reducing the pulse frequency, increasing the number of scans, or reducing the scanning speed, the laser etches the groove structure on the exposed flexible front panel surface while simultaneously completing battery isolation.

[0048] S3, an adhesive film and a flexible backsheet are sequentially laminated on the back side of the perovskite solar cell. A ring of butyl rubber for sealing is laid between the outer periphery of the adhesive film and the flexible backsheet, corresponding to the edge clearing area. The outer contour formed by the butyl rubber laid in S3 maintains a distance of at least 1.5 mm from the outer edges of the flexible front sheet and the flexible backsheet, thereby jointly defining the adhesive-free area at the edge of the laminate. This adhesive-free area is used to form the hot-melt sealing edge.

[0049] The flexible backsheet is made of a flexible material with bendable characteristics. It has a single-layer or multi-layer structure, and the material properties of its battery side layer are the same as those of the front panel material. It also has the property of being heat-melted, providing physical protection for the back of the battery and preventing physical damage to the back and environmental factors such as water and oxygen from directly affecting the adhesive film. The adhesive film and butyl rubber are bonded to the front panel to achieve a sealed and isolated battery.

[0050] S4. A lamination process is performed. Under heat and pressure, the adhesive film and butyl rubber are melted, bonding the flexible front plate, adhesive film, butyl rubber, and flexible back plate together to form a preliminary encapsulated laminate. The adhesive film is a transparent, insulating encapsulating film selected from ethylene-vinyl acetate copolymer, polyolefin elastomer, thermoplastic polyurethane, or polyvinyl butyral. The dimensions of the adhesive film are designed to completely cover the perovskite solar cell and extend outwards to contact or partially overlap the inner edge of the butyl rubber.

[0051] S5 involves localized heat treatment of the outer periphery of the laminate, allowing the flexible front plate and the flexible back plate to directly heat-melt and interpenetrate in the reserved adhesive-free area, forming a continuous, dense, and interface-free integrated heat-melted sealing edge after cooling. The localized heat treatment in S5 employs a thermoforming welding head, ultrasonic welding head, or near-infrared laser scanning device with precise temperature and pressure control. Its effective area is precisely defined in the adhesive-free area, and the heat treatment temperature is controlled between the softening point and melting point of the surface materials of the flexible front plate and flexible back plate, specifically within a temperature range of 150°C to 300°C. Simultaneously, a pressure of 0.1 to 1.0 MPa is applied for a duration of 1 to 10 seconds to ensure complete fusion and bonding of the materials without thermal degradation.

[0052] Inspection steps: A 180° peel strength test is performed on the hot-melt seal edge using a tensile testing machine; the peel strength is not less than 5 N / cm. And / or, a helium mass spectrometer is used to detect leaks in the packaged component; the water vapor permeability is less than [value missing]. .

[0053] This method constructs a triple protection system from the inside out: the body encapsulation of the adhesive film, the interface-enhanced sealing of the butyl rubber, and the outermost interface-free integrated hot-melt sealing edge. These three lines of defense, especially the last dense sealing edge formed by melting the same material, provide glass-level airtightness, greatly improving the module's moisture barrier capability, thereby significantly delaying the degradation of perovskite materials and extending the battery's operating life.

[0054] The present invention discloses a flexible perovskite solar cell encapsulation method and a solar cell assembly, which are obtained by encapsulation using the method described above. The assembly includes:

[0055] The flexible front panel has grooves on the surface of its edge clearing area;

[0056] The perovskite solar cell is located in the middle of the flexible front panel;

[0057] A film is applied to the back of the perovskite solar cell and part of the edge cleaning area.

[0058] Butyl rubber is disposed around the periphery of the adhesive film;

[0059] A flexible back panel is bonded to the flexible front panel via the adhesive film and butyl rubber;

[0060] The hot-melt sealing edge is formed by directly hot-melting and bonding the edge areas of the flexible front plate and the flexible back plate.

[0061] Example

[0062] like Figure 5As shown, the perovskite solar cell has the same area as the flexible front panel before edge cleaning. An edge cleaning step is required to reduce the area of ​​the perovskite solar cell and prevent moisture from directly contacting it during penetration. This would prevent mismatch after some efficiency degradation and rapid degradation of the cell, which could lead to degradation of the positive module. P4 edge cleaning is a necessary process. By adjusting the process parameters, grooves can be processed on the flexible front panel to change the roughness of the flexible front panel and increase the contact area with the adhesive film and butyl rubber to enhance adhesion.

[0063] After edge cleaning and trenching, an adhesive film is applied to the back of the flexible battery, and a ring of butyl rubber is laid around the edge of the adhesive film, such as... Figure 1 As shown, finally cover with the back panel, and then laminate the product together as one piece. Figure 2 As shown, finally, only the excess edges of the front and back panels are heat-treated to bond them together, achieving a seal. Figure 3 ;

[0064] The perovskite solar cell is attached to a flexible front plate, characterized in that it will not crack or delaminate as the flexible substrate is bent, thus not affecting the power generation performance of the solar cell.

[0065] The flexible front plate serves as the main carrier of the perovskite solar cell, providing physical protection for the front of the perovskite solar cell, and is sealed within it by adhesive film and butyl rubber, thus isolating it from the corrosive effects of environmental factors such as water and oxygen.

[0066] The flexible front panel is characterized by being made of a flexible material with bendable properties. It can be a single-layer or multi-layer structure, but the material properties of its battery side layer are the same as those of the back panel and it has the property of thermal melting.

[0067] The flexible backsheet provides physical protection for the back of the battery, preventing physical damage and the direct impact of water and oxygen on the adhesive film. The adhesive film and butyl rubber are bonded together with the front panel to achieve a sealed and isolated battery.

[0068] The flexible backsheet is characterized by being made of a flexible material with bendable properties. It can be a single-layer or multi-layer structure, but the material properties of its battery side layer are the same as those of the front panel and it has the property of thermal melting.

[0069] The adhesive film serves to prevent moisture from entering and to bond the front and back panels together.

[0070] The adhesive film is characterized by being slightly larger than that of the perovskite solar cell, and is used to fully encapsulate the cell through a lamination process and is bonded to the backsheet for overall protection.

[0071] The butyl rubber serves to prevent moisture from entering and to bond the front and back panels.

[0072] The butyl rubber is characterized in that it is a long strip surrounding the outer edge of the adhesive film, but the outer perimeter of the butyl rubber enclosure is a certain distance from the outer perimeter of the front panel, which is a reserved area for heat processing bonding.

[0073] The groove processing technology requires that the outer perimeter of the groove be a certain distance from the edge of the front plate to reserve a heat treatment adhesion area, so as to avoid affecting the compatibility of heat treatment; in addition, the groove can be any random shape that can increase the contact area and roughness.

[0074] The heat treatment process only processes the edges of the front and rear back plates to avoid temperature affecting the battery; the temperature should be controlled at the melting point of the material, much lower than the material failure temperature, to avoid embrittlement after cooling, which could lead to delamination during bending.

[0075] This invention significantly improves the encapsulation performance and reliability of flexible perovskite solar cells at extremely low cost through interface microstructure control and edge-integrated hot-melt sealing technology. The trench structure processing, completed simultaneously in the standard P4 edge cleaning process, requires no additional equipment or materials, yet effectively strengthens the interfacial bonding between the flexible substrate and the encapsulation material by significantly increasing the bonding area and mechanical interlocking effect, fundamentally blocking the channels for water vapor penetration along the interface. Using general-purpose thermal processing equipment to perform hot-melt sealing on the laminate edges, the front and back plates fuse in the reserved area to form a dense, interface-free integrated seal edge. This seal, together with the internal adhesive film and butyl rubber seal, constructs multiple protective barriers, greatly enhancing water and oxygen barrier capabilities. This method is simple, highly compatible with existing production lines, and achieves a qualitative leap in encapsulation reliability and device lifespan at near-zero marginal cost without changing the mainstream material system. It successfully resolves the core contradiction between high-performance encapsulation and low-cost manufacturing in the commercialization of flexible perovskite solar cells.

[0076] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A method for encapsulating flexible perovskite solar cells, characterized in that, Includes the following steps: S1, a flexible front plate and a perovskite cell prefabricated thereon are provided. The perovskite cell is subjected to P4 edge cleaning treatment so that the area of ​​the perovskite cell after edge cleaning is smaller than the area of ​​the flexible front plate, thereby forming an annular edge cleaning area on the flexible front plate around the perovskite cell. S2, Surface modification treatment is performed on the clearing area, and a groove structure is constructed on the surface of the flexible front plate in this area by laser processing to increase its surface roughness and contact area with the packaging material. S3, an adhesive film and a flexible backplate are sequentially stacked on the back of the perovskite solar cell, wherein a ring of butyl rubber for sealing is laid between the outer periphery of the adhesive film and the flexible backplate, corresponding to the position of the edge clearing area. S4, perform lamination process, under the action of heat and pressure, melt the adhesive film and butyl rubber, and bond the flexible front plate, adhesive film, butyl rubber and flexible back plate together to form a pre-encapsulated laminate; S5, perform localized hot processing on the outer peripheral edge of the laminate, so that the flexible front plate and the flexible back plate can be directly hot-melted and mutually penetrated and fused in the reserved glue-free area, and after cooling, form a continuous, dense and interface-free integrated hot-melt sealing edge.

2. The flexible perovskite solar cell encapsulation method as described in claim 1, characterized in that, The flexible front panel is made of a flexible material and has bendable characteristics. It has a single-layer or multi-layer structure, and the material properties of its battery side layer are the same as those of the back panel material and have the property of hot melting. As the main carrier of the perovskite battery, it provides physical protection for the front of the perovskite battery and is bonded to the adhesive film and butyl rubber to seal the perovskite battery. The flexible backsheet is made of a flexible material with bendable characteristics. It has a single-layer or multi-layer structure, and the material properties of its battery side layer are the same as those of the front panel material. It also has the property of being heat-melted, providing physical protection for the back of the battery and preventing physical damage to the back and environmental factors such as water and oxygen from directly affecting the adhesive film. The adhesive film and butyl rubber are bonded to the front panel to achieve a sealed and isolated battery.

3. The flexible perovskite solar cell encapsulation method as described in claim 1, characterized in that, The outer boundary of the grooved structure processing area in S2 is at least 1 mm away from the outer edge of the flexible front plate, so as to reserve a smooth area without groove processing for forming the hot melt sealing edge.

4. The flexible perovskite solar cell encapsulation method as described in claim 1, characterized in that, In S2, the surface modification process is completed simultaneously with the P4 edge cleaning process. Specifically, by adjusting the process parameters of the laser used for edge cleaning, including changing the laser mode from cutting mode to engraving mode, reducing the pulse frequency, increasing the number of scans, or reducing the scanning speed, the laser can etch the groove structure on the exposed flexible front plate surface while completing battery isolation.

5. The flexible perovskite solar cell encapsulation method as described in claim 1, characterized in that, The flexible front panel, at least its surface layer facing the battery, and the flexible back panel, at least its surface layer facing the battery, are made of the same thermoplastic polymer material; the polymer material is one of polyethylene terephthalate, polyethylene naphthalate, polyimide, or cyclic olefin copolymer.

6. The flexible perovskite solar cell encapsulation method as described in claim 1, characterized in that, The butyl rubber laid in S3 forms an outer contour that is at least 1.5 mm away from the outer edges of the flexible front plate and the flexible back plate, thereby defining the glue-free area at the edge of the laminate. This glue-free area is used to form the hot-melt sealing edge.

7. The flexible perovskite solar cell encapsulation method as described in claim 1, characterized in that, The localized hot processing in S5 employs a hot-press welding head, ultrasonic welding head, or near-infrared laser scanning device with precise temperature and pressure control. Its effective area is precisely limited to the adhesive-free area, and the temperature of the hot processing is controlled between the softening point and melting point of the surface material of the flexible front plate and flexible back plate, specifically between 150°C and 300°C. At the same time, a pressure of 0.1 to 1.0 MPa is applied for a duration of 1 to 10 seconds to ensure that the material is fully melted and bonded without thermal degradation.

8. The flexible perovskite solar cell encapsulation method as described in claim 1, characterized in that, The encapsulation film is a transparent insulating encapsulation film selected from one of ethylene-vinyl acetate copolymer, polyolefin elastomer, thermoplastic polyurethane, or polyvinyl butyral; the size of the encapsulation film is designed to completely cover the perovskite cell and extend outward to contact or partially overlap the inner edge of the butyl rubber.

9. The flexible perovskite solar cell encapsulation method as described in claim 1, characterized in that, After S5 is completed, the process also includes an inspection step: using a tensile tester to perform a 180° peel strength test on the hot-melt seal edge, the peel strength of which is not less than 5 N / cm; and / or, using a helium mass spectrometer to detect leaks in the packaged component, the water vapor permeability of which is less than .

10. A flexible perovskite solar cell encapsulation method and solar cell assembly, characterized in that, The component is prepared by encapsulation using the method described in any one of claims 1-9, and comprises: The flexible front panel has grooves on the surface of its edge clearing area; The perovskite solar cell is located in the middle of the flexible front panel; A film is applied to the back of the perovskite solar cell and part of the edge cleaning area. Butyl rubber is disposed around the periphery of the adhesive film; A flexible back panel is bonded to the flexible front panel via the adhesive film and butyl rubber; The hot-melt sealing edge is formed by directly hot-melting and bonding the edge areas of the flexible front plate and the flexible back plate.

Images