Perovskite cell stack and perovskite photovoltaic module

Abstract

The utility model discloses a perovskite cell stack and a perovskite photovoltaic module, which are applied to the photovoltaic power generation field, the perovskite cell stack comprises a front plate, a front packaging adhesive film, a perovskite cell layer, a back packaging adhesive film and a back plate which are stacked in sequence, concave-convex patterns are formed on the upper surface and the lower surface of the front plate, and the back packaging adhesive film is arranged on the back plate. And an area with concave-convex patterns is at least partially formed on the surface of the front plate and is in contact with the front packaging adhesive film. According to the utility model, the upper surface and the lower surface of the front plate of the perovskite cell lamination piece are arranged to be of the structure with the concave-convex patterns, and when the front plate is transferred after lamination is completed, as the concave-convex patterns are formed on the surface, close to the front packaging adhesive film, of the front plate, dislocation and deviation between the front plate and each layer can be avoided; and meanwhile, the concave-convex patterns are formed on the surface, exposed to the air side, of the front plate, so that the front plate can be prevented from being wrinkled when the laminated piece is laminated, and the production efficiency and the assembly yield of the perovskite battery are further improved.

Description

Technical Field

[0001] The utility model relates to the field of photovoltaic power generation, in particular to a perovskite battery stack and a perovskite photovoltaic module. Background Art

[0002] Compared with conventional photovoltaic cells, perovskite battery modules have the potential to improve power generation efficiency and reduce the cost per kilowatt-hour. They can be prepared into flexible modules for small distributed occasions such as the surface of curved battery modules and old roofs with poor load-bearing capacity. Taking the currently developed flexible perovskite battery modules as an example, transparent water-blocking polymer weather-resistant materials are mostly used as the front and back panels to ensure the weather resistance of the battery modules. However, in the production process of existing flexible perovskite battery modules, the flexible laminated parts will cause wrinkles on the front panel of the laminated parts during the lamination process of the laminating machine, resulting in poor assembly. In addition, the front panel of the laminated parts is easily misaligned with other layers during the transfer process, reducing the production efficiency of the battery modules.

[0003] Therefore, how to provide a perovskite cell stack that does not cause misalignment of the front panel of the component and avoids wrinkles during the lamination process is a technical problem that technical personnel in this field urgently need to solve. Utility Model Content

[0004] In view of this, the purpose of the utility model is to provide a perovskite cell stack and a perovskite photovoltaic module, which solves the problem in the prior art that the front plate of the laminated part will be wrinkled during the lamination process of the laminating machine, resulting in defective components, and the front plate of the laminated part is easily misaligned with other layers during the transfer process.

[0005] In order to solve the above technical problems, the utility model provides a perovskite battery stack, comprising:

[0006] A front plate, a front encapsulation film, a perovskite cell layer, a back encapsulation film and a back plate are stacked in sequence;

[0007] The upper and lower surfaces of the front plate are both formed with concave and convex patterns;

[0008] The area on the surface of the front plate where the concavo-convex pattern is at least partially formed is in contact with the front packaging film.

[0009] Optionally, both the upper and lower surfaces of the front plate are surfaces formed with continuous concave-convex patterns;

[0010] The convex pattern on one side surface of the front plate is formed by aligning with the concave pattern on the other side surface of the front plate.

[0011] Optionally, the continuous concave-convex pattern is formed on the entire upper and lower surfaces of the front plate.

[0012] Optionally, the concave-convex pattern is a light-recessed concave-convex pattern.

[0013] Optionally, the thickness of the front plate is 50 microns to 100 microns.

[0014] Optionally, the front plate is an ethylene-tetrafluoroethylene copolymer front plate.

[0015] Optionally, the front packaging film, the perovskite battery layer and the back packaging film are provided with edge sealant wrapping the front packaging film, the perovskite battery layer and the back packaging film along the outer sides perpendicular to the stacking direction.

[0016] The utility model also provides a perovskite photovoltaic module, comprising:

[0017] A junction box, and a perovskite cell stack as described above;

[0018] The junction box is connected to the current lead-out terminal of the perovskite battery stack.

[0019] Optionally, it further includes a cover plate and an adhesive; the adhesive is provided at least in the connection area of ​​the front plate in the perovskite battery stack; the connection area is the area of ​​the front plate connected to the cover plate;

[0020] The junction box is arranged on a side of the cover plate facing away from the front plate.

[0021] Optionally, the front packaging film, the perovskite battery layer and the back packaging film are provided with edge sealant along the outer sides perpendicular to the stacking direction, and the front plate extends to a side surface covering the edge sealant;

[0022] The extended front plate is a flat front plate, and the side of the flat front plate facing away from the edge sealant is connected to the cover plate through the adhesive.

[0023] Optionally, the cover plate is a polyethylene terephthalate cover plate having a thickness greater than that of the front plate.

[0024] It can be seen that the perovskite battery stack provided by the utility model includes a front plate, a front packaging film, a perovskite battery layer, a back packaging film and a back plate which are stacked in sequence, and the upper and lower surfaces of the front plate are formed with concave-convex patterns, and at least part of the area on the surface of the front plate where the concave-convex pattern is formed is in contact with the front packaging film. The utility model arranges the upper and lower surfaces of the front plate of the perovskite battery stack to form a structure with a concave-convex pattern. When the stacking is completed and the stacking is performed, the concave-convex pattern is formed on the surface of the front plate close to the front packaging film, which can avoid the front plate from being misaligned with each layer. At the same time, by setting the surface of the front plate exposed to the air to form a concave-convex pattern, wrinkles can be avoided on the front plate when the stack is laminated, thereby improving the production efficiency and component yield of the perovskite battery.

[0025] In addition, the utility model also provides a perovskite photovoltaic module, which also has the above-mentioned beneficial effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0027] Figure 1 A schematic diagram of the structure of a perovskite battery stack provided in an embodiment of the utility model;

[0028] Figure 2 A schematic structural diagram of a perovskite battery stack provided with edge sealant according to an embodiment of the utility model;

[0029] Figure 3 A schematic diagram of the structure of another perovskite battery stack provided in an embodiment of the utility model;

[0030] Figure 4 A schematic structural diagram of another perovskite battery stack provided in an embodiment of the utility model;

[0031] Figure 5 A schematic diagram of the structure of a perovskite photovoltaic module provided by an embodiment of the utility model;

[0032] Figures 1 to 5 In the figure, the reference numerals are described as follows:

[0033] 10-front panel, 20-front encapsulation film, 30-perovskite cell layer, 31-bus bar, 40-rear encapsulation film, 50-back panel, 60-edge sealant, 70-cover panel, 80-junction box, 90-adhesive. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is only a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0035] Compared with conventional photovoltaic cells, perovskite battery modules have the potential to improve power generation efficiency and reduce the cost per kilowatt-hour. They can be prepared into flexible modules for small distributed occasions such as the surface of curved battery modules and old roofs with poor load-bearing capacity. Taking the currently developed flexible perovskite battery modules as an example, transparent water-blocking polymer weather-resistant materials are mostly used as the front and back panels to ensure the weather resistance of the battery modules. However, the existing flexible perovskite battery modules have the following problems in the production process: (1) Since the front panel of the flexible perovskite battery module adopts a flexible front panel, the front panel of the flexible laminated part is prone to wrinkles during the lamination process of the laminating machine, resulting in poor assembly. (2) During the transfer process of the flexible laminated part, the front panel of the laminated part is prone to misalignment with other layers, which leads to incomplete assembly packaging and reduces the production efficiency of the battery module.

[0036] The utility model forms a structure with concave-convex patterns on the upper and lower surfaces of the front plate of the perovskite battery stack. When the stack is completed and the stack is transferred, the concave-convex pattern is formed on the surface of the front plate close to the front packaging film, which can avoid the front plate from being misaligned with each layer. At the same time, the concave-convex pattern is formed on the surface of the front plate exposed to the air, which can avoid wrinkles on the front plate when the stack is laminated, thereby improving the production efficiency and component yield of the perovskite battery. For details, please refer to the following embodiments.

[0037] Embodiment 1:

[0038] Please refer to Figure 1 , Figure 1 A schematic diagram of the structure of a perovskite battery stack provided in an embodiment of the utility model. The perovskite battery stack may include:

[0039] A front plate 10, a front encapsulation film 20, a perovskite cell layer 30, a back encapsulation film 40 and a back plate 50 are stacked in sequence;

[0040] The front plate 10 has concave and convex patterns formed on both the upper and lower surfaces;

[0041] At least a portion of the surface of the front plate 10 where the concavo-convex pattern is formed contacts with the front packaging film 20 .

[0042] The upper and lower surfaces of the front plate in this embodiment, that is, the two side surfaces of the front plate in the stacking direction. In this embodiment, the front packaging film 20 and the front plate 10 are sequentially arranged outward from the front of the perovskite battery layer 30, and the back packaging film 40 and the back plate 50 are sequentially arranged on the back of the perovskite battery layer 30 to form a stack of the perovskite battery layer 30, and the stack of the perovskite battery layer 30 is subsequently laminated. The front plate 10 is arranged so that the side surface close to the perovskite battery layer 30 and the side surface facing away from the perovskite battery layer 30 are both arranged to form a structure with a concave-convex pattern. In this embodiment, at least part of the area with the concavo-convex pattern is formed on the surface of the front plate 10 on the side close to the perovskite battery layer 30, and contacts the front packaging film 20 to increase the contact friction between the front plate 10 and the front packaging film 20, and avoid the misalignment between the two. At this time, the surface of the front plate 10 on the side close to the perovskite battery layer 30 can be set to form a concavo-convex pattern in part of the area, or it can be set to form a concavo-convex pattern in all areas. It should be noted that setting the front plate 10 to form a concavo-convex pattern on the side close to the perovskite battery layer 30 is more conducive to the contact friction between the front plate 10 and the front packaging film 20 or other laminates, and avoids the relative misalignment of the front plate 10 to the greatest extent. Correspondingly, the surface of the side of the front plate 10 facing away from the perovskite battery layer 30 can be set to form a concavo-convex pattern in part of the area, or it can also be set to form a concavo-convex pattern on the entire surface, as long as it can avoid wrinkles on the front plate 10 during the lamination process. Furthermore, the present embodiment does not limit the specific shape of the concave-convex pattern formed on the surface of the front panel 10, as long as it can increase the contact friction between the side surface of the front panel 10 close to the perovskite battery layer 30 and the front packaging film 20 and other contact laminates, and the concave-convex pattern set on the surface of the front panel 10 can avoid wrinkles on the front panel 10 during lamination. In this embodiment, the side surface of the front panel 10 close to the perovskite battery layer 30 and the side surface of the front panel 10 facing away from the perovskite battery layer 30 can be set to concave-convex patterns of different shapes, or can be set to concave-convex patterns of the same shape, and the concave-convex patterns of the same shape on both sides can be set correspondingly. In this embodiment, the perovskite battery layer 30 stack can be set as a flexible perovskite battery layer 30 stack, and the front panel 10 and the back panel 50 in this embodiment can be set as a flexible front panel 10 and a flexible back panel 50 correspondingly.

[0043] In this embodiment, the thickness of the backplane 50 can be set to between 0.2 mm and 0.35 mm, and the backplane 50 can be set to a multi-layer composite structure formed by a PVDF (polyvinylidene fluoride) film layer, an aluminum film layer, a PET (polyethylene terephthalate) film layer and a Primer (primer) film layer stacked in sequence in the direction away from the perovskite battery layer 30, wherein the thickness of the PVDF film layer can be set to between 10 microns and 30 microns to ensure the weather resistance of the backplane 50, the thickness of the aluminum film layer can be set to between 50 microns and 80 microns to ensure the water vapor barrier effect of the backplane 50, the thickness of the PET film layer can be set to between 100 microns and 200 microns to provide support and insulation effects, and the thickness of the Primer film layer can be set to between 30 microns and 80 microns to enhance the adhesion between the backplane 50 and the packaging film. Correspondingly, the back packaging film 40 can be made of POE film (POE film is a polyolefin elastomer film) with low water vapor permeability, and the thickness can be set to between 0.4 mm and 0.7 mm. The perovskite battery in the perovskite battery layer 30 can be deposited on a flexible substrate material, and the substrate can be made of stainless steel sheets, PET sheets, PEN sheets, or bendable ultra-thin glass, and the substrate thickness can be between 0.05 mm and 0.1 mm. The perovskite battery layer 30 can be composed of multiple sub-batteries connected in series, in parallel, or in series and parallel. The front packaging film 20 can be set to an EPE film (EPE film is a polyethylene foam film) or a POE film between 0.8 mm and 2 mm.

[0044] Furthermore, in order to improve the power generation efficiency of the perovskite battery layer 30 stack, the above-mentioned concave-convex pattern can be set as a light-trapping concave-convex pattern.

[0045] In this embodiment, the concavo-convex pattern is set as a light-trapping concavo-convex pattern, that is, the set concavo-convex pattern can trap the incident light beam, so as to prevent the light beam from reflecting away from the perovskite cell layer 30 stack via the surface of the front plate 10, so that more incident light reaches the surface of the perovskite cell. This embodiment does not limit the specific shape of the light-trapping concavo-convex pattern, as long as it can prevent the incident light from reflecting away from the perovskite cell layer 30 stack and allow the light beam to reach the surface of the perovskite cell.

[0046] Furthermore, in order to facilitate forming a concave-convex pattern structure of a certain height on the surface of the front plate 10 and ensure the weather protection function of the front plate 10, the thickness of the front plate 10 can be set to 50 microns to 100 microns.

[0047] In this embodiment, the thickness of the front plate 10 is set to 50 micrometers to 100 micrometers, which can ensure that a concave-convex pattern of a specified height is formed on the surface of the front plate 10 and the weather resistance of the front plate 10 is ensured.

[0048] Furthermore, in order to improve the weather resistance of the front plate 10 , the front plate 10 may be configured as an ethylene-tetrafluoroethylene copolymer front plate 10 .

[0049] It should be noted that in this embodiment, the front plate 10 is set as an ethylene-tetrafluoroethylene copolymer front plate 10, which can ensure the lightweight effect of the stack. The ethylene-tetrafluoroethylene copolymer film generally weighs only 0.15 to 0.35 kilograms per square meter and has the advantages of good insulation, wear resistance, corrosion resistance and long service life.

[0050] Further, in order to ensure the sealing effect of the stack of the perovskite battery layer 30 and prevent the perovskite battery layer 30 from being affected by the intrusion of impurities such as water vapor, it can be referred to Figure 2 , Figure 2 A schematic diagram of the structure of a stack of perovskite battery layers 30 provided with an edge sealant 60 provided in an embodiment of the utility model. The front packaging film 20, the perovskite battery layer 30 and the back packaging film 40 may be provided with an edge sealant 60 wrapping the front packaging film 20, the perovskite battery layer 30 and the back packaging film 40 along the outer side perpendicular to the stacking direction.

[0051] It should be noted that the edge sealant 60 provided in this embodiment is intended to prevent impurities such as water vapor from invading the contact surface between the perovskite battery layer 30 and the front packaging film 20, and the contact surface between the perovskite battery layer 30 and the back packaging film 40 to affect the perovskite battery. The actual setting range can be adjusted as needed, for example, the edge sealant 60 can be set to wrap the side of the perovskite battery layer 30, part of the side of the front packaging film 20, and part of the side of the back packaging film 40. This embodiment does not limit the specific material of the edge sealant 60, for example, butyl glue can be used.

[0052] Furthermore, the preparation process of the above-mentioned perovskite battery layer 30 stack mentioned in the embodiment of the utility model may include the following steps:

[0053] Step S1: Material drying treatment: Place the backplane 50, frontplane 10, front encapsulation film 20 and back encapsulation film 40 in an environment with a temperature of 25 to 35 degrees Celsius and a relative humidity of less than 20% RH for 6 hours to remove excess moisture in the materials.

[0054] Step S2: Lamination process. The following specific lamination process steps are performed in a workshop environment with a relative humidity lower than 30% RH:

[0055] Step S21: Take a carrier plate with polytetrafluoroethylene cloth attached, place it with the polytetrafluoroethylene cloth facing upward, and clean it with alcohol. The carrier plate can be a stainless steel plate, an aluminum plate or an epoxy resin plate.

[0056] Step S22: Place the back plate 50 in the middle of the polytetrafluoroethylene cloth surface in the carrier plate and smooth it.

[0057] Step S23: Paste edge sealant 60 on the back plate 50 at the peripheral position of the battery area to form a closed circle, forming edge sealant 60 circles, and the width of the edge sealant 60 is 10 mm to 15 mm. Preferably, butyl tape is used as the edge sealant 60 because it is easy to operate and has excellent water vapor barrier performance.

[0058] Step S24: placing the backside encapsulation film 40 inside the edge sealant 60 circle and smoothing it.

[0059] Step S25: Place the bus bar at the corresponding position of the back packaging film 40, and use a soldering iron to heat a part of the bus bar and fix it on the back packaging film 40. The heating temperature is 220 degrees Celsius to 300 degrees Celsius, and the heating time is 2 seconds to 5 seconds. The other part of the bus bar extends from the edge sealant 60. A small piece of edge sealant 60 can be attached to cover the bus bar.

[0060] Step S26: Place the flexible perovskite battery on the back packaging film 40 to ensure that the positive and negative electrodes are in contact with the bus bars respectively.

[0061] Step S27: Cover the front packaging film 20 on the flexible perovskite battery.

[0062] Step S28: Place the front panel 10 on the front packaging film 20 and the edge sealant 60 and smooth it. The front panel 10 can extend beyond the edge sealant 60 on one side and beyond the edge of the stack by 30 mm to 50 mm on the other three sides, so as to facilitate the subsequent installation of the cover plate carrying the junction box.

[0063] The perovskite battery layer 30 stack provided by the embodiment of the utility model comprises a front plate 10, a front packaging film 20, a perovskite battery layer 30, a back packaging film 40 and a back plate 50 which are stacked in sequence. The upper and lower surfaces of the front plate 10 are formed with concavo-convex patterns, and at least part of the area on the surface of the front plate 10 where the concavo-convex pattern is formed is in contact with the front packaging film 20. The utility model sets the surfaces of both sides of the front plate 10 of the perovskite battery layer 30 stack along the stacking direction to be formed with a structure with concavo-convex patterns. When the stacking is completed and the stack is transferred, the concavo-convex pattern is formed on the surface of the front plate 10 close to the front packaging film 20, so that the front plate 10 and the layers can be prevented from being misaligned and offset. At the same time, the concavo-convex pattern is formed on the surface of the front plate 10 exposed to the air side, so that the front plate 10 can be prevented from wrinkling when the stack is laminated, thereby improving the production efficiency of the perovskite battery and the yield rate of the assembly. At the same time, the concavo-convex pattern is set in the front plate 10, so that the aesthetics of the front side of the perovskite battery layer 30 stack is improved. In addition, the embodiment of the utility model improves the power generation capacity of the perovskite battery layer 30 stack by setting the concave-convex pattern as a light-trapping concave-convex pattern; the thickness of the front plate 10 is set to 50 microns to 100 microns, which can ensure that a concave-convex pattern of a specified height is formed on the surface of the front plate 10, while ensuring the weather resistance of the front plate 10; the front plate 10 is set to an ethylene-tetrafluoroethylene copolymer front plate 10, which can improve the lightweight and weather resistance of the stack, while improving the service life of the front plate 10 and the entire stack; by setting an edge sealant 60 that wraps the side of the front packaging film 20, the perovskite battery layer 30 and the back packaging film 40, the sealing effect of the perovskite battery layer 30 stack can be improved, and the perovskite battery layer 30 can be prevented from being affected by the intrusion of impurities such as water vapor.

[0064] Embodiment 2:

[0065] Please refer to Figure 3 , Figure 3 A schematic diagram of the structure of another perovskite battery stack provided by an embodiment of the utility model. Compared with the above-mentioned embodiment 1, the difference between the perovskite battery stack and the embodiment 1 is that: the upper and lower surfaces of the front plate 10 are both formed with continuous concave-convex patterns;

[0066] The convex pattern on one side of the front plate 10 and the concave pattern on the other side of the front plate 10 are formed in alignment.

[0067] In this embodiment, the concavo-convex pattern on the surface of the front plate 10 facing the perovskite battery layer 30 and the concavo-convex pattern on the surface of the front plate 10 facing away from the perovskite battery layer 30 are both set to a structure with continuous concavo-convex patterns, and the convex pattern on one side of the front plate 10 is formed in alignment with the concave pattern on the other side of the front plate 10, that is, the area of ​​the front plate 10 corresponding to the continuous concavo-convex pattern is formed to form a wavy concavo-convex pattern. In this embodiment, by setting the above-mentioned continuous concavo-convex pattern, when processing the concave pattern on one side, the convex pattern is formed on the opposite side, which facilitates the processing of the front plate 10 to form the concavo-convex pattern, and further avoids the front plate 10 from wrinkling during lamination.

[0068] Further, in order to improve the functionality of the front panel 10, reference may be made to Figure 4 , Figure 4 A schematic diagram of the structure of another stack of perovskite battery layers 30 provided in an embodiment of the utility model. Continuous concave-convex patterns are formed on all surfaces of the upper and lower sides of the front plate 10 .

[0069] It should be noted that in this embodiment, by configuring the surface of the side of the front panel 10 facing the perovskite cell layer 30 and the surface of the side of the front panel 10 facing away from the perovskite cell layer 30 to form a surface with a continuous concave-convex pattern, the effect of misalignment between the front panel 10 and the contacting laminate is further avoided, while the risk of wrinkles on the front panel 10 during lamination is minimized.

[0070] The perovskite battery layer 30 stack provided by the embodiment of the utility model is applied, and the concave-convex pattern on the surface of the side of the front plate 10 close to the perovskite battery layer 30, and the concave-convex pattern on the surface of the side of the front plate 10 facing away from the perovskite battery layer 30 are both set to a structure with a continuous concave-convex pattern, and the convex pattern on the surface of one side of the front plate 10 is formed in alignment with the concave pattern on the surface of the other side of the front plate 10, which is convenient for processing and forming the concave-convex pattern, and further avoids wrinkles on the front plate 10 during lamination. In addition, the embodiment of the utility model is to avoid the effect of misalignment and offset between the front plate 10 and the contacting laminate to the greatest extent by setting the surface of the side of the front plate 10 close to the perovskite battery layer 30, and the surface of the side of the front plate 10 facing away from the perovskite battery layer 30 to form a surface with a continuous concave-convex pattern, while minimizing the risk of wrinkles on the front plate 10 during lamination.

[0071] The following is a specific perovskite battery stack provided by the utility model, which may include the following structure:

[0072] A front plate, a front encapsulation film, a perovskite cell layer, a back encapsulation film and a back plate are stacked in sequence;

[0073] Continuous concave-convex patterns are formed on all surfaces of both sides of the front plate aligned along the stacking direction; the convex pattern on one side of the front plate is formed by aligning the concave pattern on the other side of the front plate; the concave-convex pattern is a light-trapped concave-convex pattern

[0074] At least part of the concavo-convex pattern formed on the surface of the front plate is in contact with the front packaging film;

[0075] The thickness of the front plate is 50 microns to 100 microns; the front plate is an ethylene-tetrafluoroethylene copolymer front plate;

[0076] Edge sealant wrapping the front packaging film, the perovskite battery layer and the back packaging film is provided on the outer sides perpendicular to the stacking direction.

[0077] The following is an introduction to the perovskite photovoltaic module provided by the embodiment of the present invention. The perovskite photovoltaic module described below and the perovskite cell stack described above can be referenced to each other.

[0078] Specific requests may include:

[0079] A junction box, and a perovskite cell stack as described above;

[0080] The junction box is connected to the current lead-out terminal of the perovskite cell stack.

[0081] It should be noted that, in this embodiment, the junction box may be disposed on the back side of the perovskite cell layer, or may be disposed at other corresponding positions.

[0082] Furthermore, in order to ensure that the above perovskite photovoltaic modules are suitable for curved surfaces, reference can be made to Figure 5 , Figure 5 A schematic diagram of the structure of a perovskite photovoltaic module provided by an embodiment of the utility model, wherein the perovskite photovoltaic module further includes a cover plate 70 and an adhesive 90;

[0083] At least in the stack of the perovskite cell layer 30, the connection area of ​​the front plate 10 is provided with adhesive 90; the connection area is the area of ​​the front plate 10 connected to the cover plate 70;

[0084] The junction box 80 is disposed on a side of the cover plate 70 facing away from the front plate 10 .

[0085] It should be noted that the structure of the cover plate 70 and the adhesive 90 in this embodiment can refer to the existing flexible perovskite photovoltaic module. In this embodiment, the adhesive 90 is set in the connection area of ​​the front plate 10 and connected to the cover plate 70, wherein the connection area of ​​the front plate 10 can be set in the edge area of ​​the front plate 10 to avoid blocking the perovskite cell layer 30 and affecting the photoelectric conversion efficiency of the component. The thickness of the above-mentioned cover plate 70 can be set to between 10 mm and 30 mm, and the junction box 80 can use a thin junction box 80 with a height of 8 to 15 mm to avoid blocking the light receiving area of ​​the component. A lead-out seam can be set in the above-mentioned cover plate 70 to facilitate leading the bus bar 31 to connect with the junction box 80.

[0086] Furthermore, in order to reduce the height of the junction box 80 and avoid affecting the photoelectric conversion efficiency of the component, the front packaging film 20, the perovskite cell layer 30 and the back packaging film 40 are provided with edge sealant 60 along the outer side perpendicular to the stacking direction, and the front plate 10 extends to cover the side surface of the edge sealant 60;

[0087] The extended front plate 10 is a flat front plate 10 , and a side of the flat front plate 10 facing away from the edge sealant 60 is connected to the cover plate 70 via an adhesive 90 .

[0088] It should be noted that in this embodiment, the area extending from the front panel 10 on the upper side of the corresponding edge sealant 60 is set as the area connected to the cover plate 70, and the area extending from the front panel 10 is set as a flat front panel 10 as the connection area of ​​the above-mentioned front panel 10. This can reduce the height of the final junction box 80, thereby avoiding obstruction of the light receiving area of ​​the component.

[0089] Furthermore, in order to ensure the supporting effect of the cover plate 70 , the cover plate 70 may be configured as a polyethylene terephthalate cover plate 70 having a thickness greater than that of the front plate 10 .

[0090] In this embodiment, by setting the cover plate 70 to be a polyethylene terephthalate cover plate 70 with a thickness greater than that of the front plate 10 , the support effect of the cover plate 70 is ensured, thereby ensuring the stability of the supporting junction box 80 .

[0091] The perovskite photovoltaic module provided by the embodiment of the utility model includes a junction box and the perovskite battery stack as described above, wherein the junction box is connected to the current lead-out end of the perovskite battery stack to output the current of the perovskite battery layer. In addition, the embodiment of the utility model also includes a cover plate 70 and an adhesive 90, and the adhesive 90 is provided in the connection area of ​​the front plate 10 at least in the perovskite battery layer 30 stack; the connection area is the area in the front plate 10 connected to the cover plate 70, and the junction box 80 is arranged on the side of the cover plate 70 facing away from the front plate 10. By setting the cover plate 70 and setting the junction box 80 on the upper side of the cover plate 70, it is ensured that the component is successfully prepared; by setting the area extending from the front plate 10 on the upper side of the corresponding edge sealant 60 as the area connected to the cover plate 70, and setting the area extending from the front plate 10 as the flat front plate 10 as the connection area of ​​the above-mentioned front plate 10, the height of the junction box 80 finally set can be reduced, thereby avoiding blocking the light receiving area of ​​the component; by setting the cover plate 70 as a polyethylene terephthalate cover plate 70 whose thickness is greater than the thickness of the front plate 10, the support effect of the cover plate 70 is ensured, thereby ensuring the stability of the supporting junction box 80.

[0092] In this specification, each embodiment is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referenced to each other. It should also be noted that, in this article, relationships such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprises" or any other variants are intended to cover non-exclusive inclusions.

[0093] The above is a detailed introduction to a perovskite battery stack and a perovskite photovoltaic module provided by the utility model. Specific examples are used in this article to illustrate the principle and implementation mode of the utility model. The description of the above embodiments is only used to help understand the structure of the utility model and its core idea. At the same time, for those skilled in the art, according to the idea of ​​the utility model, there will be changes in the specific implementation mode and application scope. In summary, the content of this specification should not be understood as a limitation on the utility model.

Claims

1. A perovskite battery stack, characterized in that: include: A front plate, a front encapsulation film, a perovskite cell layer, a back encapsulation film and a back plate are stacked in sequence; The upper and lower surfaces of the front plate are both formed with concave and convex patterns; The area on the surface of the front plate where the concavo-convex pattern is at least partially formed is in contact with the front packaging film.

2. The perovskite battery stack according to claim 1, characterized in that: The upper and lower surfaces of the front plate are both surfaces formed with continuous concave and convex patterns; The convex pattern on one side surface of the front plate is formed by aligning with the concave pattern on the other side surface of the front plate.

3. The perovskite battery stack according to claim 2, characterized in that: The continuous concave-convex pattern is formed on the entire upper and lower surfaces of the front plate.

4. The perovskite battery stack according to claim 1, characterized in that: The concave-convex pattern is a light-trapping concave-convex pattern.

5. The perovskite battery stack according to claim 1, characterized in that: The thickness of the front plate is 50 micrometers to 100 micrometers.

6. The perovskite battery stack according to claim 1, characterized in that: The front plate is an ethylene-tetrafluoroethylene copolymer front plate.

7. The perovskite battery stack according to claim 1, characterized in that: The front packaging film, the perovskite battery layer and the back packaging film are provided with edge sealant wrapping the front packaging film, the perovskite battery layer and the back packaging film along the outer sides perpendicular to the stacking direction.

8. A perovskite photovoltaic module, characterized in that: include: A junction box, and a perovskite cell stack as claimed in any one of claims 1 to 7; The junction box is connected to the current lead-out terminal of the perovskite battery stack.

9. The perovskite photovoltaic module according to claim 8, characterized in that: It also includes a cover plate and bonding adhesive; At least in the perovskite cell stack, the bonding glue is provided in the connection area of ​​the front plate; the connection area is the area of ​​the front plate connected to the cover plate; The junction box is arranged on a side of the cover plate facing away from the front plate.

10. The perovskite photovoltaic module according to claim 9, characterized in that: The front packaging film, the perovskite cell layer and the back packaging film are provided with edge sealant along the outer sides perpendicular to the stacking direction, and the front plate extends to cover the side surface of the edge sealant; The extended front plate is a flat front plate, and the side of the flat front plate facing away from the edge sealant is connected to the cover plate through the adhesive.

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