Pre-packaged solar cell module

Abstract

The utility model relates to photovoltaic module technical field discloses a kind of pre-packaged solar cell modules, comprising: conductive glass;Electric core film layer, in the side of conductive glass;Pre-packaged film, in the side of conductive glass with electric core film layer, pre-packaged film sealing cover is located the outside of electric core film layer and is enclosed with conductive glass to form the space of protecting electric core film layer, the periphery edge of pre-packaged film is bonded on conductive glass;And at least pre-packaged film side, deviating from electric core film layer, is thermoplastic surface, to make that thermoplastic surface can be heated to form bonding surface again and reshape.The utility model is wrapped by pre-packaged film outside perovskite electric core film layer, and the closed protective space formed by using pre-packaged film and conductive glass together, can effectively isolate the direct contact of external component such as sealing bag and electric core film layer, avoid structural damage produced by electric core film layer due to friction scratch, to improve the product yield and service life of pre-packaged solar cell module piece.

Description

Technical Field

[0001] This utility model relates to the field of photovoltaic module technology, specifically to a pre-packaged solar cell module. Background Technology

[0002] As a clean, renewable, and high-quality energy source, solar energy development and utilization technologies have become a core area of ​​research and a focal point of industrial competition in the global energy sector. Photovoltaic cells, as the core carrier of solar energy conversion, directly determine the economic viability and widespread adoption of solar energy utilization through their conversion efficiency and manufacturing costs. Against this backdrop, perovskite / crystalline silicon tandem solar cells, with their groundbreaking technological advantages, have achieved rapid development and become one of the next-generation mainstream technologies in the photovoltaic field.

[0003] However, perovskite chips are quite sensitive to moisture and oxygen in the air. If they are not promptly stacked and encapsulated with crystalline silicon solar cells after fabrication, hydrolysis and oxidation reactions can easily occur inside the perovskite chip, leading to a decrease in the cell's photoelectric conversion efficiency and causing power degradation. Therefore, unencapsulated perovskite chips are currently commonly transported in sealed bags. However, during this process, the perovskite chip's film layer is easily scratched by the sealing bag, resulting in chip performance failure. Utility Model Content

[0004] This invention provides a pre-packaged solar cell module to solve the problem that the film layer in perovskite chips is easily scratched by the sealing bag, causing the chip to fail.

[0005] This utility model provides a pre-packaged solar cell module, comprising: Conductive glass; The battery cell film layer is located on one side of the conductive glass; A pre-encapsulation film is located on the side of the conductive glass where the battery cell film layer is located. The pre-encapsulation film is sealed and covered on the outside of the battery cell film layer and together with the conductive glass forms a space to protect the battery cell film layer. The four edges of the pre-encapsulation film are bonded to the conductive glass. At least the side of the pre-encapsulation film away from the battery cell film layer is a thermoplastic surface, so that the thermoplastic surface can be heated again to form an adhesive surface and be reshaped.

[0006] Beneficial Effects: This invention, by wrapping a pre-encapsulated film around the perovskite cell film layer and utilizing the enclosed protective space formed by the pre-encapsulated film and conductive glass, provides comprehensive physical protection for the cell film layer. This effectively isolates the cell film layer from direct contact with external components such as sealing bags, preventing structural damage caused by friction and scratches, and reducing the risk of component performance degradation due to perovskite chip failure. This improves the product yield and lifespan of the pre-encapsulated solar cell module. Furthermore, the pre-encapsulated film possesses elastic buffering properties, providing excellent shock absorption and protection during the transportation or handling of the pre-encapsulated solar cell module. This reduces damage to the cell film layer from external impacts, further ensuring the structural integrity and performance stability of the pre-encapsulated solar cell module. Moreover, this structural design is simple and compact, without adding extra assembly difficulty or cost. In addition, by making the side of the pre-encapsulated film away from the cell film layer a thermoplastic surface, when it is subsequently stacked with crystalline silicon cells, this surface can be heated to form an adhesive surface and be reshaped, without the need for additional adhesive layers or complex processing, which simplifies the stacking and packaging process, improves production efficiency, and takes into account both the protection reliability of perovskite chips during transportation and the process compatibility of subsequent stacking applications.

[0007] In one optional embodiment, a functional coating is provided on the side of the battery cell film layer away from the conductive glass, the functional coating being located between the battery cell film layer and the pre-encapsulation film, the functional coating having hydrophobic and water-blocking properties and / or infrared light transmittance.

[0008] Beneficial effects: This utility model adds a functional coating with hydrophobic and water-blocking properties and / or infrared light transmittance between the cell film layer and the pre-encapsulation film. On the one hand, the hydrophobic and water-blocking properties can prevent external moisture and humidity from penetrating to the cell film layer through the pre-encapsulation film, reducing the risk of performance degradation of the perovskite chip due to hydrolysis and oxidation, and strengthening the moisture protection of the cell film layer. On the other hand, the infrared light transmittance can improve the transmittance efficiency of the infrared band in the solar spectrum. When the perovskite chip and the crystalline silicon chip form a tandem battery structure, more infrared light can penetrate the perovskite layer and be absorbed and converted by the crystalline silicon chip below, making full use of the infrared range energy of the solar spectrum, avoiding spectral waste, and improving the overall photoelectric conversion efficiency of the perovskite / crystalline silicon four-terminal tandem solar cell.

[0009] In one optional embodiment, the functional coating includes a hydrophobic and water-blocking layer and an infrared light-enhancing layer stacked along the thickness direction of the pre-encapsulated solar cell module, wherein the hydrophobic and water-blocking layer is located on the side of the functional coating away from the cell film layer; or, the hydrophobic and water-blocking layer is located on the side of the functional coating closer to the cell film layer.

[0010] Beneficial effects: The hydrophobic and water-blocking layer can block the penetration of external moisture and humidity, building a reliable moisture barrier for the perovskite cell film layer and inhibiting performance degradation caused by hydrolysis and oxidation; the infrared light anti-reflection layer can effectively improve the transmittance efficiency of the infrared band in the solar spectrum, especially suitable for the perovskite / crystalline silicon four-terminal stacked cell structure, allowing more infrared light to penetrate the perovskite layer and be absorbed and converted by the crystalline silicon chip below, making full use of the full spectrum energy to improve photoelectric conversion efficiency.

[0011] In one optional embodiment, the functional coating is a fluoropolymer protective film or a silicone polymer protective film; and / or, the material of the pre-encapsulated film or the thermoplastic surface is a polyolefin elastomer, ethylene / vinyl acetate, or polyvinyl butyral.

[0012] Beneficial effects: Fluoropolymer and silicon polymer protective films not only possess long-lasting hydrophobic and water-blocking properties, preventing external moisture and humidity from penetrating into the perovskite cell film layer, effectively inhibiting performance degradation caused by hydrolysis and oxidation, and providing long-lasting moisture protection for the cell film layer. Secondly, their chemical properties are stable, exhibiting good compatibility with the perovskite cell film layer, preventing chemical reactions or the release of harmful substances that could lead to cell film layer failure, thus ensuring the long-term stability of the module. Simultaneously, these polymer protective films also possess infrared light transmission enhancement properties, specifically improving the transmittance efficiency of the infrared band in the solar spectrum. When applied to a perovskite / crystalline silicon four-terminal stacked cell structure, more infrared light can penetrate the perovskite layer and be absorbed and converted by the underlying crystalline silicon chip, fully utilizing the full spectrum of energy and improving the overall photoelectric conversion efficiency of the perovskite / crystalline silicon four-terminal stack. This further optimizes the energy conversion performance of the pre-packaged module while strengthening the reliability of cell protection, balancing stability and high efficiency. Polyolefin elastomers, ethylene / vinyl acetate, and polyvinyl butyral all possess reliable thermoplastic bonding properties, water and vapor barrier capabilities, and weather resistance. They not only meet the functional requirements of pre-encapsulated film sealing and protection, and subsequent lamination, heating, reshaping, and bonding, but also form a synergistic protection system with functional coatings, further enhancing the moisture-proof and scratch-proof protection of the battery cell film.

[0013] In one alternative embodiment, the pre-packaged solar cell module further includes a busbar, a portion of which is located between the functional coating and the cell film layer, and the other portion of which extends beyond the functional coating and the cell film layer.

[0014] Beneficial effects: This utility model, by placing one part of the busbar between the functional coating and the cell film layer, and extending the other part beyond both, not only ensures a stable electrical connection between the busbar and the cell film layer, ensuring efficient current collection and conduction, but also uses the functional coating to cover and protect the connection area between the busbar and the cell film layer, reducing the risk of external moisture and humidity penetrating through the connection gap, further enhancing the moisture protection effect; at the same time, the extended part of the busbar provides a convenient interface for subsequent docking with crystalline silicon cells or junction boxes, allowing subsequent circuit connections to be completed without additional disassembly of the pre-packaged structure, simplifying the stacked packaging process.

[0015] In one optional embodiment, the busbars are in pairs, and the pair of busbars are electrically connected to the positive and negative electrodes of the battery cell film layer, respectively.

[0016] Beneficial effects: By setting a pair of busbars and electrically connecting them to the positive and negative electrodes of the cell film layer, this invention achieves independent and orderly conduction of the positive and negative currents of the cell film layer, ensuring efficient energy collection and stable output through the extended section, avoiding circuit confusion or current loss caused by a single busbar connection. On the other hand, the corresponding connection method of the paired busbars clarifies the circuit path of the positive and negative electrodes, providing a clear interface for precise docking with crystalline silicon cells and junction boxes, reducing circuit docking errors and operational difficulties in the stacked packaging process, and improving process adaptability.

[0017] In one alternative embodiment, the conductive glass includes a clearing region surrounding the periphery of the cell film layer, and along the thickness direction of the pre-encapsulated solar cell module, a portion of the orthographic projection of the pre-encapsulated film lies within the clearing region.

[0018] Beneficial effects: On the one hand, the cleaning area can remove impurities and residual materials from the periphery of the cell film layer, providing a flat and clean adhesion substrate for the circumferential bonding of the pre-encapsulation film and the conductive glass, effectively avoiding bonding defects caused by contaminant interference, ensuring a tighter edge seal between the pre-encapsulation film and the conductive glass, and significantly improving the sealing performance of the encapsulation structure; on the other hand, the cleaning area can reserve space for the installation of edge seals, making it convenient to configure edge seals around the periphery of the pre-encapsulation film in this area, further enhancing the sealing and protection effect of the component edge.

[0019] In one alternative embodiment, a tearable film is provided on the side of the pre-encapsulated film away from the conductive glass, and the tearable film adheres to or adsorbs onto the surface of the pre-encapsulated film.

[0020] Beneficial effects: This utility model provides a peelable film on the side of the pre-encapsulated film away from the conductive glass, which is then adhered to or adsorbed onto its surface. On the one hand, it provides precise protection for the thermoplastic surface of the pre-encapsulated film before transportation, storage, and subsequent stacking and encapsulation, effectively preventing damage to the adhesive performance of the surface due to friction, dust, oil, or scratches, and ensuring the sealing performance during subsequent heat reshaping and bonding. On the other hand, the peelable film has a peelable property, which can be quickly removed without leaving any adhesive residue, and does not affect the subsequent docking process between the pre-encapsulated film and components such as crystalline silicon cells, making the operation convenient and efficient.

[0021] In one optional embodiment, the edge sealing body is further provided around the periphery of the pre-encapsulated film in the edge clearing area, and the top end of the edge sealing body is not lower than the top end of the pre-encapsulated film along the thickness direction of the pre-encapsulated solar cell module.

[0022] Beneficial effects: This invention, by setting an edge seal around the pre-encapsulation film within the edge cleaning area, can seal the bonding edge between the pre-encapsulation film and the conductive glass, effectively preventing moisture and oxygen from intruding from the edge, and improving the moisture-proof and oxidation-resistant protection of the cell film layer. Furthermore, by ensuring that the top of the edge seal is not lower than the top of the pre-encapsulation film, the edge seal forms a physical barrier, effectively preventing adhesive overflow from the pre-encapsulation film due to heating softening or pressure during the pre-encapsulation process. This prevents the pre-encapsulation film from adhering outside the sealing area, affecting the subsequent lamination accuracy, and ensuring the regularity of the component edge structure.

[0023] In one alternative embodiment, the pre-encapsulation film is bonded to the side of the battery cell film layer opposite to the conductive glass; or, the pre-encapsulation film is non-adhesively disposed in contact with the side of the battery cell film layer opposite to the conductive glass.

[0024] Beneficial effects: When the pre-encapsulation film is bonded to the surface of the cell film layer, it forms a tightly sealed structure, effectively blocking the intrusion paths of moisture and impurities, strengthening the protection of the cell film layer and improving the overall structural integrity. When the pre-encapsulation film adopts a non-adhesive contact setting, it can avoid frictional damage between film layers through physical isolation, and also avoid interference from the heating bonding during the pre-encapsulation stage to the subsequent secondary lamination process with crystalline silicon cells. Specifically, sealing protection during the pre-encapsulation stage can be achieved by bonding the edge of the pre-encapsulation film to the edge cleaning area. The pre-encapsulation film above the cell film layer is heated and melted for the first time during the secondary lamination, which can avoid the defects of incomplete melting caused by secondary heating, ensuring the appearance and light transmission performance of the encapsulation, while adapting to the application requirements of thermosetting pre-encapsulation film materials. Attached Figure Description

[0025] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the structure of a pre-packaged solar cell module according to an embodiment of the present invention; Figure 2 This is a schematic diagram of another pre-packaged solar cell module according to an embodiment of the present invention; Figure 3 for Figure 2 A top view of a pre-packaged solar cell module.

[0027] Explanation of reference numerals in the attached figures: 1. Conductive glass; 101. Edge cleaning area; 2. Battery cell film layer; 3. Pre-encapsulation film; 4. Functional coating; 5. Busbar; 6. Tearable film; 7. Edge seal. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0029] The following is combined with Figures 1 to 3 The following describes embodiments of the present invention.

[0030] According to embodiments of the present invention, such as Figures 1 to 3 As shown, a pre-encapsulated solar cell module is provided, including: conductive glass 1, cell film layer 2 and pre-encapsulation film 3.

[0031] Specifically, the battery cell film layer 2 is located on one side of the conductive glass 1; the pre-encapsulation film 3 is located on the side of the conductive glass 1 where the battery cell film layer 2 is located, and the pre-encapsulation film 3 is sealed and covered on the outside of the battery cell film layer 2 and together with the conductive glass 1 to form a space to protect the battery cell film layer 2. The four edges of the pre-encapsulation film 3 are bonded to the conductive glass 1; and at least the side of the pre-encapsulation film 3 facing away from the battery cell film layer 2 is a thermoplastic surface, so that the thermoplastic surface can be heated again to form an adhesive surface and be reshaped.

[0032] This embodiment wraps a pre-encapsulation film 3 around the outside of the perovskite cell film layer 2, and utilizes the enclosed protective space formed by the pre-encapsulation film 3 and the conductive glass 1. On the one hand, it can provide all-round physical protection for the cell film layer 2, effectively isolating external components such as sealing bags from direct contact with the cell film layer 2, avoiding structural damage to the cell film layer 2 caused by friction and scratches, reducing the risk of component performance degradation due to the failure of the perovskite chip cell film layer 2, thereby improving the product yield and service life of the pre-encapsulated solar cell module. On the other hand, the pre-encapsulation film 3 has elastic buffering characteristics, which can play a good shock absorption and protection role during the transportation or handling of the pre-encapsulated solar cell module, reducing the damage to the cell film layer 2 caused by external impacts, further ensuring the structural integrity and performance stability of the pre-encapsulated solar cell module. Moreover, the structural design is simple and compact, without adding extra assembly difficulty and cost. In addition, the side of the pre-encapsulated film 3 facing away from the cell film layer 2 is made into a thermoplastic surface. When it is subsequently stacked with crystalline silicon cells, this surface can be heated to form an adhesive surface and reshaped, without the need for additional adhesive layers or complex processing. This simplifies the stacking and packaging process, improves production efficiency, and takes into account both the protection reliability of the perovskite chip during transportation and the process compatibility of subsequent stacking applications.

[0033] It should be noted that in order to stably seal the pre-encapsulated film 3 around the periphery of the cell film layer 2, a pre-lamination process is also required for the pre-encapsulated solar cell module. The specific steps are as follows: Step 1: Lay a laminated isolation film on the side of the pre-encapsulated film 3 away from the conductive glass 1. The size of the laminated isolation film is slightly larger than the size of the conductive glass 1. The material of the laminated isolation film is a material with very low adhesion to the pre-encapsulated film 3, such as thin Teflon high-temperature cloth, silicone cloth or high-silica cloth. Step 2: A rigid cover plate is installed on the side of the laminated release film away from the pre-encapsulated film 3. The size of the rigid cover plate is adapted to the conductive glass 1, and the lamination deviation between the rigid cover plate and the conductive glass 1 does not exceed 1mm, so as to avoid damage to the conductive glass 1 due to uneven pressure during the lamination process. The conductive glass 1 and the rigid cover plate are fixed with high temperature tape to prevent the rigid cover plate from slipping during handling and lamination. Step 3: Place the assembled laminate into the laminator, set up the lamination fixture to avoid overpressure during the lamination process, set the appropriate lamination parameters and then perform the lamination operation. Step 4: After lamination is completed and cooled, remove the rigid cover plate. The lamination separator film can be peeled off directly (when peeling the film, the tension should be kept parallel to the surface of the module to avoid generating a pulling force perpendicular to the cell film layer 2, which would damage the film layer); or the lamination separator film can be left unremoved and removed before subsequent stacking and encapsulation with the crystalline silicon solar cells.

[0034] It should be further noted that, to achieve long-term storage and safe transfer of pre-encapsulated solar cell modules, after the pre-encapsulated solar cell modules are manufactured, they must be placed in a sealed bag containing a pre-quantitative desiccant and subjected to vacuum sealing. The desiccant can be calcium chloride or silica gel, which effectively adsorbs residual moisture after vacuuming from the sealed bag. Furthermore, even if the sealed bag is slightly damaged, it can still effectively adsorb moisture that has entered the bag, thus significantly extending the effective storage period of the product and ensuring the performance stability of the cell film layer 2 during storage and transfer. The sealed bag can be an aluminum foil bag, nylon bag, or PE (polyethylene) bag, or other packaging carriers with reliable barrier properties, further enhancing the isolation effect against external moisture and oxygen, providing double protection for the long-term protection of the pre-encapsulated modules.

[0035] In one embodiment, such as Figures 1 to 3 As shown, a functional coating 4 is provided on the side of the cell film layer 2 away from the conductive glass 1. The functional coating 4 is located between the cell film layer 2 and the pre-encapsulation film 3, and the functional coating 4 has hydrophobic and water-blocking properties and / or infrared light transmittance. It can be understood that by adding a functional coating 4 with hydrophobic and water-blocking properties and / or infrared light transmittance between the cell film layer 2 and the pre-encapsulation film 3, on the one hand, the hydrophobic and water-blocking properties can prevent external moisture and humidity from penetrating into the cell film layer 2 through the pre-encapsulation film 3, reducing the risk of performance degradation of the perovskite chip due to hydrolysis and oxidation, and strengthening the moisture protection of the cell film layer 2; on the other hand, the infrared light transmittance can improve the transmittance efficiency of the infrared band in the solar spectrum. When the perovskite chip and the crystalline silicon chip form a stacked cell structure, more infrared light can penetrate the perovskite layer and be absorbed and converted by the crystalline silicon chip below, making full use of the infrared range energy of the solar spectrum, avoiding spectral waste, and improving the overall photoelectric conversion efficiency of the perovskite / crystalline silicon four-terminal stacked solar cell.

[0036] It should be noted that the functional coating 4 in this embodiment can be applied to the surface of the cell film layer 2 by means of dip coating, spraying, scraping, rolling, self-leveling, etc. After the coating is completed, it can be cured at room temperature or by heating. Good ventilation should be ensured during the curing process.

[0037] Furthermore, the functional coating 4 includes a hydrophobic and water-blocking layer and an infrared light-enhancing layer stacked along the thickness direction of the pre-encapsulated solar cell module. The hydrophobic and water-blocking layer is located on the side of the functional coating 4 away from the cell film layer 2; or, the hydrophobic and water-blocking layer is located on the side of the functional coating 4 closer to the cell film layer 2. It can be understood that the hydrophobic and water-blocking layer can block the penetration of external moisture and humidity, constructing a reliable moisture barrier for the perovskite cell film layer 2 and inhibiting performance degradation caused by hydrolysis and oxidation; the infrared light-enhancing layer can efficiently improve the transmittance efficiency of the infrared band in the solar spectrum, especially suitable for the perovskite / crystalline silicon four-terminal stacked cell structure, allowing more infrared light to penetrate the perovskite layer and be absorbed and converted by the underlying crystalline silicon chip, making full use of the full spectrum energy to improve photoelectric conversion efficiency.

[0038] It should be noted that the number of hydrophobic and water-blocking layers and infrared antireflective layers can be one or multiple, and can be adjusted adaptively according to design needs. This invention does not impose specific limitations in this regard. For example, when the infrared antireflective layer is multi-layered, if the antireflective coating (AR) principle is used, multiple layers with different refractive indices can be coated. The differences in refractive indices between these layers can be used to control the light reflection and transmission characteristics, thereby further improving the light transmission efficiency in the infrared band and optimizing the antireflective effect.

[0039] Furthermore, the functional coating 4 is a fluoropolymer protective film or a silicone polymer protective film; and / or, the material or thermoplastic surface of the pre-encapsulation film 3 is polyolefin elastomer (POE), ethylene / vinyl acetate (EVA), or polyvinyl butyral (PVB). It can be understood that the fluoropolymer and silicone polymer protective films not only possess long-lasting hydrophobic and water-blocking properties, preventing external moisture and humidity from penetrating into the perovskite cell membrane layer 2, but also effectively inhibit the performance degradation of the cell membrane layer 2 caused by hydrolysis and oxidation, providing durable moisture protection for the cell membrane layer 2. Secondly, its chemical properties are stable, and it has good compatibility with the perovskite cell film layer 2. It will not cause chemical reactions or release harmful substances that would lead to the failure of the cell film layer 2, thus ensuring the long-term stability of the module. At the same time, this type of polymer protective film also has infrared light transmission enhancement properties, which can specifically improve the transmission efficiency of the infrared band in the solar spectrum. When applied to the perovskite / crystalline silicon four-terminal tandem cell structure, it can allow more infrared light to penetrate the perovskite layer and be absorbed and converted by the underlying crystalline silicon chip, making full use of the full spectrum energy and improving the overall photoelectric conversion efficiency of the perovskite / crystalline silicon four-terminal tandem cell. On the basis of strengthening the reliability of cell protection, it further optimizes the energy conversion performance of the pre-encapsulated module, taking into account both stability and high efficiency. Polyolefin elastomers, ethylene / vinyl acetate, and polyvinyl butyral all have reliable thermoplastic bonding properties, water and vapor barrier capabilities, and weather resistance. They can not only meet the functional requirements of the pre-encapsulated film 3 for sealing protection and subsequent lamination heating and reshaping bonding, but also form a synergistic protection system with the functional coating 4, further strengthening the moisture-proof and scratch-proof protection of the cell film layer 2.

[0040] In one embodiment, such as Figures 1 to 3 As shown, the pre-packaged solar cell module also includes a busbar 5. A portion of the busbar 5 is located between the functional coating 4 and the cell film layer 2, while the other portion extends beyond the functional coating 4 and the cell film layer 2. It can be understood that this embodiment, by placing a portion of the busbar 5 between the functional coating 4 and the cell film layer 2, and extending the other portion beyond both, ensures a stable electrical connection between the busbar 5 and the cell film layer 2, ensuring efficient current collection and conduction. Furthermore, the functional coating 4 provides a protective covering over the connection area between the busbar 5 and the cell film layer 2, reducing the risk of external moisture and humidity penetrating through the connection gap, further enhancing the moisture protection effect. Simultaneously, the extended portion of the busbar 5 provides a convenient interface for subsequent docking with crystalline silicon cells or junction boxes, allowing subsequent circuit connections to be completed without additional disassembly of the pre-packaged structure, simplifying the stacked packaging process.

[0041] Furthermore, the busbars 5 are in pairs, and the pair of busbars 5 are electrically connected to the positive and negative electrodes of the cell film layer 2, respectively. It can be understood that by setting up a pair of busbars 5 and electrically connecting them to the positive and negative electrodes of the cell film layer 2, this embodiment achieves independent and orderly conduction of the positive and negative currents of the cell film layer 2, ensuring efficient energy collection and stable output through the extended portion, avoiding circuit confusion or current loss caused by a single busbar 5 connection. On the other hand, the corresponding connection method of the paired busbars 5 clarifies the circuit path of the positive and negative electrodes, providing a clear interface for precise subsequent docking with crystalline silicon cells and junction boxes, reducing circuit docking errors and operational difficulties during the stacked packaging process, and improving process adaptability.

[0042] Furthermore, such as Figure 3 As shown, a pair of busbars 5 are arranged opposite each other along the width direction of the pre-encapsulated solar cell module and extend along the length direction of the pre-encapsulated solar cell module.

[0043] In one embodiment, such as Figures 1 to 3 As shown, the conductive glass 1 includes a cleaning region 101 surrounding the cell film layer 2. Along the thickness direction of the pre-encapsulated solar cell module, the orthographic projection of a portion of the pre-encapsulated film 3 lies within the cleaning region 101. It can be understood that, on the one hand, the cleaning region 101 removes impurities and residual materials from the periphery of the cell film layer 2, providing a smooth and clean substrate for the circumferential bonding of the pre-encapsulated film 3 and the conductive glass 1, effectively avoiding bonding defects caused by contaminant interference, ensuring a tighter edge seal between the pre-encapsulated film 3 and the conductive glass 1, and significantly improving the sealing performance of the encapsulation structure; on the other hand, the cleaning region 101 can reserve space for the installation of edge seals 7, facilitating the configuration of edge seals 7 surrounding the pre-encapsulated film 3 in this area, further enhancing the sealing and protection effect of the module edge.

[0044] In one embodiment, such as Figure 1 As shown, a tearable film 6 is provided on the side of the pre-encapsulated film 3 away from the conductive glass 1. The tearable film 6 is adhered to or adsorbed onto the surface of the pre-encapsulated film 3. It can be understood that by providing a tearable film 6 on the side of the pre-encapsulated film 3 away from the conductive glass 1 and adhering or adsorbing it onto its surface, this embodiment can, on the one hand, provide precise protection for the thermoplastic surface of the pre-encapsulated film 3 before transportation, storage, and subsequent stacking and encapsulation, effectively preventing damage to the adhesive performance of the surface due to friction, dust, oil, or scratches, and ensuring the sealing performance during subsequent heat remolding and bonding; on the other hand, the tearable film 6 has peelable characteristics, can be quickly removed during use without leaving adhesive residue, and does not affect the subsequent docking process between the pre-encapsulated film 3 and components such as crystalline silicon cells, making the operation convenient and efficient.

[0045] It should be noted that in this embodiment, "adhesion" refers to the bonding of the tearable film 6 to the surface of the pre-encapsulated film 3 at multiple points or over the entire area through the use of colloids; while "adsorption" specifically refers to the adsorption and fixation formed by the electrostatic interaction between the tearable film 6 and the surface of the pre-encapsulated film 3.

[0046] In one embodiment, such as Figures 1 to 3 As shown, an edge seal 7 is also provided around the pre-encapsulation film 3 within the edge cleaning area 101. Along the thickness direction of the pre-encapsulated solar cell module, the top of the edge seal 7 is not lower than the top of the pre-encapsulation film 3. It can be understood that by providing the edge seal 7 around the pre-encapsulation film 3 within the edge cleaning area 101, this embodiment can seal the bonding edge between the pre-encapsulation film 3 and the conductive glass 1, effectively preventing moisture and oxygen from intruding from the edge, thus improving the moisture-proof and oxidation-resistant protection of the cell film layer 2. By ensuring that the top of the edge seal 7 is not lower than the top of the pre-encapsulation film 3, a physical barrier can be formed by the edge seal 7, effectively preventing the pre-encapsulation film 3 from overflowing due to heating softening or pressure during the pre-encapsulation process. This prevents the pre-encapsulation film 3 from adhering outside the sealing area, affecting the subsequent lamination accuracy, and ensuring the regularity of the module's edge structure.

[0047] It should be noted that in the pre-encapsulated solar cell module of this embodiment, the aforementioned edge seal 7 can also be omitted. In this case, the size of the pre-encapsulation film 3 can be set to match the size of the conductive glass 1. After the pre-encapsulated solar cell module and components such as crystalline silicon cells are assembled to form a complete stacked module and the first encapsulation is completed, aluminum foil tape containing butyl rubber is applied to the periphery of the stacked module. Then, the encapsulation water-blocking performance of the entire stacked module is further improved through a secondary lamination process. At the same time, the structural design and process steps of the pre-encapsulation stage are simplified, and the overall manufacturing cost of the module is reduced.

[0048] Specifically, in this embodiment, the edge seal 7 can be, but is not limited to, butyl rubber.

[0049] In one embodiment, the pre-encapsulation film 3 is bonded to the side of the cell film layer 2 opposite to the conductive glass 1; or, the pre-encapsulation film 3 is non-adhesively contacted with the side of the cell film layer 2 opposite to the conductive glass 1. When the pre-encapsulation film 3 is bonded to the surface of the cell film layer 2, a tightly sealed structure can be formed, effectively blocking the intrusion path of moisture and impurities, strengthening the protection of the cell film layer 2 and improving the overall structural integrity. When the pre-encapsulation film 3 is non-adhesively contacted, it can avoid frictional damage between film layers through physical isolation, and also avoid interference from the heating bonding in the pre-encapsulation stage to the subsequent secondary stacking process with crystalline silicon cells. Specifically, sealing protection in the pre-encapsulation stage can be achieved by only bonding the edge of the pre-encapsulation film 3 to the edge clearing area 101. The pre-encapsulation film 3 above the cell film layer 2 is first heated and melted during the secondary stacking, which can avoid the defects of incomplete local melting caused by secondary heating, ensuring the appearance and light transmission performance of the encapsulation, and adapting to the application requirements of thermosetting pre-encapsulation film 3 materials.

[0050] Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A pre-packaged solar cell module, characterized in that, include: Conductive glass (1); The battery cell film layer (2) is located on one side of the conductive glass (1); A pre-encapsulation film (3) is located on the side of the conductive glass (1) where the battery cell film layer (2) is provided. The pre-encapsulation film (3) seals and covers the outside of the battery cell film layer (2) and together with the conductive glass (1) forms a space to protect the battery cell film layer (2). The four edges of the pre-encapsulation film (3) are bonded to the conductive glass (1). At least the side of the pre-encapsulation film (3) facing away from the battery cell film layer (2) is a thermoplastic surface, so that the thermoplastic surface can be heated again to form an adhesive surface and be reshaped.

2. The pre-packaged solar cell module according to claim 1, characterized in that, The battery cell film layer (2) has a functional coating (4) on the side away from the conductive glass (1). The functional coating (4) is located between the battery cell film layer (2) and the pre-encapsulated film (3). The functional coating (4) has hydrophobic and water-blocking properties and / or infrared light transmission enhancement properties.

3. The pre-packaged solar cell module according to claim 2, characterized in that, The functional coating (4) includes a hydrophobic and water-blocking layer and an infrared light-enhancing layer stacked along the thickness direction of the pre-encapsulated solar cell module. The hydrophobic and water-blocking layer is located on the side of the functional coating (4) away from the cell film layer (2); or, the hydrophobic and water-blocking layer is located on the side of the functional coating (4) close to the cell film layer (2).

4. The pre-packaged solar cell module according to claim 2, characterized in that, The functional coating (4) is a fluoropolymer protective film or a silicone polymer protective film; and / or, the material of the pre-encapsulated film (3) or the thermoplastic surface is a polyolefin elastomer, ethylene / vinyl acetate or polyvinyl butyral.

5. The pre-packaged solar cell module according to claim 2, characterized in that, The pre-packaged solar cell module also includes a busbar (5), a portion of which is located between the functional coating (4) and the cell film layer (2), and the other portion extends out of the functional coating (4) and the cell film layer (2).

6. The pre-packaged solar cell module according to claim 5, characterized in that, The busbars (5) are in pairs, and the pair of busbars (5) are electrically connected to the positive and negative electrodes of the battery cell film layer (2).

7. The pre-packaged solar cell module according to claim 1, characterized in that, The conductive glass (1) includes a clearing region (101) surrounding the cell film layer (2). Along the thickness direction of the pre-encapsulated solar cell module, the orthographic projection of a portion of the pre-encapsulated film (3) lies within the clearing region (101).

8. The pre-encapsulated solar cell module according to any one of claims 1 to 7, characterized in that, The pre-encapsulated film (3) has a tearable film (6) on the side away from the conductive glass (1), and the tearable film (6) adheres to or adsorbs onto the surface of the pre-encapsulated film (3).

9. The pre-packaged solar cell module according to claim 7, characterized in that, The edge clearing area (101) is also provided with an edge seal (7) surrounding the pre-encapsulated film (3). Along the thickness direction of the pre-encapsulated solar cell module, the top end of the edge seal (7) is not lower than the top end of the pre-encapsulated film (3).

10. The pre-packaged solar cell module according to claim 9, characterized in that, The pre-encapsulation film (3) is bonded to the side of the battery cell film layer (2) away from the conductive glass (1); or, the pre-encapsulation film (3) is non-adhesively disposed in contact with the side of the battery cell film layer (2) away from the conductive glass (1).

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