Method for manufacturing solar cell module and solar cell module manufactured using same

Abstract

According to an embodiment of the present invention, a method for manufacturing a solar cell module comprises a step of arranging a sealing member so as to form at least one air gap at the inner periphery of a lower layer, a step of stacking, on the lower layer having the sealing member arranged at the inner periphery thereof, an encapsulant, solar cells, an encapsulant, and an upper layer in order, and a step of compressing and laminating the stacked module, thus allowing air remaining in the solar cell module to be removed.

Description

Method for manufacturing a solar cell module and a solar cell module manufactured using the same

[0001] The present invention relates to a method for manufacturing a solar cell module and a solar cell module manufactured using the same.

[0002] Solar cells, used in solar power generation, form the heart of solar power generation systems, directly converting sunlight's energy into electricity. They are manufactured from semiconductors such as single-crystal, polycrystalline, or amorphous silicon, organic materials, or compounds (CdTe, CIGS). Their structure consists of solar cell elements arranged in series or parallel, and various packaging processes are performed to protect the elements. These units are then assembled into a solar cell module.

[0003] In general, the above solar cell module has a structure in which the surface that receives sunlight is covered with a glass surface, the gap is filled with a sealing material made of thermoplastic plastic, and the back surface is protected with a back sheet made of heat-resistant and weather-resistant plastic.

[0004] Typically, solar cell modules encapsulate the solar cells with a transparent material, such as glass, to protect their interior. In these cases, the transparent material, such as glass, is manufactured in a separate process and then bonded to the encapsulating material using adhesives or other methods.

[0005] However, with the recent proliferation of moisture-sensitive perovskite-based solar cell devices, encapsulation materials made of thermoplastics alone are not sufficiently moisture-blocking. Consequently, solar cell modules can be manufactured by adding a rubber sealant with a low water vapor transmittance rate (WVTR) to the perimeter. However, this method poses the problem of air bubbles remaining within the solar cell module not being released during the lamination process.

[0006] The purpose of embodiments of the present invention is to remove air remaining in a solar cell module by controlling the arrangement of a sealant arranged on the inner periphery of the solar cell module so that the air remaining in the solar cell module can be discharged outside the solar cell module.

[0007] In order to achieve the above-described purpose, one embodiment of the present invention discloses a method for manufacturing a solar cell module, including the steps of arranging a sealing member so that at least one void is formed on the inner periphery of a lower layer, the steps of sequentially stacking a sealing material, a solar cell, the sealing material, and an upper layer on the lower layer having the sealing member arranged on the inner periphery, and the steps of pressing and laminating the stacked module.

[0008] Another embodiment of the present invention for achieving the above-described purpose discloses a solar cell module manufactured by the method for manufacturing a solar cell module of claim 1, comprising a solar cell, a sealing material disposed on the upper and lower portions of the solar cell, a front layer disposed on the upper and lower portions of the sealing material, and a sealing member disposed along the inner periphery of the front layer.

[0009] A method for manufacturing a solar cell module according to an embodiment of the present invention can remove air remaining in the solar cell module by disposing a sealant so that at least one void is formed on the inner surface of the solar cell module, thereby allowing air remaining in the solar cell module to be discharged outside the solar cell module during the lamination process.

[0010] FIG. 1 is a cross-sectional view schematically illustrating an example of a solar cell module according to one embodiment of the present invention.

[0011] FIG. 2 is a flowchart illustrating an example of a method for manufacturing a solar cell module according to one embodiment of the present invention.

[0012] Fig. 3 is a plan view schematically illustrating an example of the arrangement of a sealing material in the solar cell module manufacturing method of Fig. 2.

[0013] Fig. 4 is a plan view schematically illustrating another example of the arrangement of a sealing material in the solar cell module manufacturing method of Fig. 2.

[0014] FIG. 5 is a plan view schematically illustrating another example of the arrangement of a sealing material in the solar cell module manufacturing method of FIG. 2.

[0015] FIG. 6 is a plan view schematically illustrating another example of the arrangement of a sealing material in the solar cell module manufacturing method of FIG. 2.

[0016] Fig. 7 is a plan view schematically illustrating an example of a solar cell module manufactured using the solar cell module manufacturing method of Fig. 2.

[0017] Figure 8 is a photograph showing a solar cell module manufactured at a pressure of 85 KPa.

[0018] In order to achieve the above-described purpose, one embodiment of the present invention discloses a method for manufacturing a solar cell module, including the steps of arranging a sealing member so that at least one void is formed on the inner periphery of a lower layer, the steps of sequentially stacking a sealing material, a solar cell, the sealing material, and an upper layer on the lower layer having the sealing member arranged on the inner periphery, and the steps of pressing and laminating the stacked module.

[0019] In the above laminating step, air inside the solar cell module can be discharged to the outside through the gap.

[0020] The above lower layer has a rectangular shape with four sides, the sealing member is arranged along the four sides, and the gap can be formed in one area of ​​the sealing member respectively arranged along the four sides.

[0021] The above laminated module can be laminated at a pressure of 80 KPa to 90 KPa.

[0022] The size of the above gap may be 1 mm to 3 mm.

[0023] The thickness of the above sealing member may be 1 mm to 2.3 mm.

[0024] Another embodiment of the present invention for achieving the above-described purpose discloses a solar cell module manufactured by the method for manufacturing a solar cell module of claim 1, comprising a solar cell, a sealing material disposed on the upper and lower portions of the solar cell, a front layer disposed on the upper and lower portions of the sealing material, and a sealing member disposed along the inner periphery of the front layer.

[0025] The front layer has a rectangular shape with four sides, and the sealing members are arranged along the four sides, and the sealing members arranged along the four sides respectively can form a connection portion between the sealing members that are in contact with each other.

[0026] The present invention is capable of various modifications and embodiments. Specific embodiments are illustrated in the drawings and described in detail in the detailed description. The effects and features of the present invention, as well as the methods for achieving them, will become clearer with reference to the embodiments described in detail below, along with the drawings. However, the present invention is not limited to the embodiments disclosed below and can be implemented in various forms.

[0027] Hereinafter, embodiments of the present invention will be described in detail with reference to the attached drawings. When describing with reference to the drawings, identical or corresponding components are given the same drawing reference numerals, and redundant descriptions thereof will be omitted.

[0028] In the examples below, the terms first, second, etc. are not used in a limiting sense, but are used for the purpose of distinguishing one component from another.

[0029] In the examples below, singular expressions include plural expressions unless the context clearly indicates otherwise.

[0030] In the examples below, terms such as “include” or “have” mean that a feature or component described in the specification is present, and do not preclude the possibility that one or more other features or components may be added.

[0031] For convenience of explanation, the sizes of components in the drawings may be exaggerated or reduced. For example, the sizes and thicknesses of each component shown in the drawings are arbitrarily indicated for convenience of explanation, and thus the present invention is not necessarily limited to what is shown.

[0032] In the following examples, the x-axis, y-axis, and z-axis are not limited to three axes on an orthogonal coordinate system, and can be interpreted in a broad sense that includes them. For example, the x-axis, y-axis, and z-axis may be orthogonal to each other, but may also refer to different directions that are not orthogonal to each other.

[0033] In some embodiments, where implementations are otherwise feasible, specific process sequences may be performed in a different order than described. For example, two processes described in succession may be performed substantially simultaneously, or in a reverse order from the described order.

[0034] One embodiment of the present invention relates to a method for manufacturing a solar cell module, and another embodiment of the present invention relates to a solar cell module, which will be described with reference to FIGS. 1 to 8, which schematically illustrate a method for manufacturing a solar cell module and several examples of solar cell modules.

[0035] FIG. 1 is a cross-sectional view schematically illustrating an example of a solar cell module according to one embodiment of the present invention.

[0036] Referring to FIG. 1, a solar cell module may include a solar cell (10), a sealing material (20) disposed on the upper and lower portions of the solar cell (10), a front layer (30) disposed on the upper and lower portions of the sealing material, and a sealing member (40) disposed along the inner circumference of the front layer (30).

[0037] A solar cell (10) is a semiconductor device that directly converts light energy into electrical energy, and may be composed of two or more layers of semiconductor materials that absorb light. For example, when light is irradiated onto a semiconductor diode forming a pn junction, a photon is absorbed in the solar cell (10), electron / hole pairs are generated, and a potential difference is generated at the junction of two different materials, allowing current to flow.

[0038] Solar cells (10) can be broadly classified into silicon solar cells and perovskite solar cells depending on the constituent material of the photoactive layer, and a solar cell module according to one embodiment of the present invention can include a perovskite solar cell.

[0039] A perovskite solar cell may include a perovskite photoactive layer, and the perovskite photoactive layer may have a structure represented by the chemical formula ABX3 (wherein A is a monovalent organic cation or metal cation, B is a divalent metal cation, and X may be a halogen anion). In addition, the perovskite solar cell may have four structures, namely, a nip mesoscopic structure, a nip planar structure, a pin planar structure, and a pin mesoscopic structure, and in general, the perovskite solar cell may be manufactured by including upper and lower electrodes, a hole transport layer, a perovskite photoactive layer, and an electron transport layer.

[0040] Perovskite solar cells can also be joined to silicon solar cells to form tandem solar cells.

[0041] That is, the solar cell (10) applied to the solar cell module according to one embodiment of the present invention may include a perovskite solar cell or a tandem solar cell including a perovskite photoactive layer.

[0042] Meanwhile, a solar cell module according to one embodiment of the present invention may have a plurality of solar cells (10) arranged inside, and in an optional embodiment, three solar cells (10) may be arranged inside.

[0043] The encapsulant (20) is disposed on the upper and lower portions of the solar cell (10) to seal the solar cell (10) and prevent moisture or foreign substances from entering the solar cell (10), and further, can be formed of a material that can firmly bind the solar cell (10) and allow sunlight to pass through and reach the solar cell (10). For example, the encapsulant (20) may include at least one selected from among EVA (Ethylene-vinyl acetate), POE (Polyolefin), polyethylene, polycarbonate, polystyrene, polyethylene terephthalate, polyethylene naphthalate, and polyvinyl butyral, and as an optional embodiment, may be formed of POE (Polyolefin) having excellent transparency, cushioning, tensile strength, and elasticity.

[0044] The front layer (30) can be divided into an upper layer and a lower layer and can be placed on the upper and lower portions of the encapsulant (20), and can serve to protect the solar cell (10) within the solar cell module from the external environment. Accordingly, the front layer (30) can include a material having transparency, weather resistance, impact resistance, and long-term reliability for outdoor use, and can include, for example, tempered glass or resin.As a specific example, when the lower layer (30) is processed into glass, it may include borosilicate glass, quartz glass, etc., and when processed into resin, it may include polyethersulfone, polyethylene, polycarbonate, polystyrene, polyethylene terephthalate, polyethylene naphthalate, polybutylene terepthalate, polyphenylene sulfide, polypropylene, aramid, polyamideimide, polyimide, aromatic polyimide, polyetherimide, polyvinylidene fluoride, acrylonitrile butadiene styrene. It may include one or more selected from butadienestyrene, ethylene tetrafluoroethylene, PEEK (Polyetheretherketon), PO (Polyolefin), PMMA (Polymethylmethacrylate), PVA (Polyvinyl alcohol), PVCi (Polyvinylcinnamate), TAC (Triacetylcellulose), and polyvinyl chlorides, but is not limited thereto.

[0045] Meanwhile, at least one side of the front layer (30) arranged on the upper and lower sides may be a light-receiving surface, and sunlight may be exposed to the inside of the solar cell module through the light-receiving surface.

[0046] The sealing member (40) is formed as a lining between the upper and lower front layers (30) along the inner periphery of the front layers (30) disposed on the upper and lower sides, and can serve to protect the interior of the solar cell module from the external environment. Therefore, the sealing member (40) may include a member having weather resistance, impact resistance, and long-term reliability for outdoor use. The sealing member (40) may include, for example, natural rubber or synthetic rubber, and when it includes synthetic rubber, it may include any one selected from styrene-butadiene rubber (SBR), acrylonitrile-butadiene rubber (NBR), chloroprene rubber, butyl rubber, EP rubber, thiol, and silicone rubber.

[0047] In an optional embodiment, the sealing member (40) may include butyl rubber. Butyl rubber has excellent shielding properties and a low water vapor transmittance rate (WVTR). When the solar cell (10) is a perovskite solar cell that is vulnerable to moisture, the low WVTR can prevent moisture from penetrating from the outside of the solar cell module into the inside, thereby preventing damage to the perovskite solar cell. In addition, butyl rubber has excellent heat resistance, maintains stability even at high temperatures, does not deform even in a high-temperature environment due to sunlight, and has excellent flexibility at low temperatures, so it exhibits excellent performance even in cold environments such as winter. In addition, butyl rubber has excellent insulation properties, so it can block electricity from flowing to the outside of the solar cell module, thereby preventing electric shock accidents.

[0048] Meanwhile, the sealing member (40) may be arranged with a thickness of 1 mm to 2.4 mm. If the thickness of the sealing member (40) is less than 1 mm, the space inside the solar cell module may become too thin to accommodate the solar cell (10) and the encapsulant (30), and even if it is accommodated, the encapsulant may be too thin to sufficiently protect the solar cell, which may reduce the durability of the solar cell module. If the thickness of the sealing member (40) exceeds 2.4 mm, the thickness of the solar cell module becomes thicker, which may result in poor space efficiency, and as the internal space becomes wider, an additional encapsulant (30) may be required in addition to the encapsulant (30) sufficient to protect the solar cell (10). If the thickness of the encapsulant (30) becomes thicker due to the additional encapsulant (30), the amount of sunlight absorbed by the solar cell (10) may decrease, which may cause a problem in that the efficiency of the solar cell (10) may decrease.

[0049] As a result, the solar cell module according to the embodiment of the present invention can prevent moisture from penetrating into the solar cell module by arranging a sealing member (40) having a low moisture permeability along the inner periphery of the front layer (30) disposed on the upper and lower sides, thereby preventing the perovskite solar cell, which is vulnerable to moisture, from being damaged by moisture.

[0050] FIG. 2 is a flowchart illustrating an example of a method for manufacturing a solar cell module according to one embodiment of the present invention.

[0051] Referring to FIG. 2, a method for manufacturing a solar cell module may include a step (s100) of arranging a sealing member so that at least one gap is formed on the inner periphery of a lower layer, a step (s200) of sequentially stacking a sealing member, a solar cell, a sealing member, and an upper layer on the lower layer having the sealing member arranged on the inner periphery, and a step (s300) of pressing and laminating the stacked module.

[0052] Fig. 3 is a plan view schematically illustrating an example of the arrangement of a sealing material in the solar cell module manufacturing method of Fig. 1.

[0053] Referring to FIG. 3, in the step (s100) of arranging a sealing member so that at least one gap is formed on the inner periphery of the lower layer, a sealing member (40) may be arranged along the inner periphery of the lower layer (30) on the front layer (30) (hereinafter referred to as the lower layer) arranged below. As a specific example, the lower layer (30) may have a rectangular shape, and the sealing member (40) may be arranged on the lower layer (30) in a form that surrounds the center of the lower layer (30) by lining along the four sides of the lower layer (30) that is rectangular. At this time, a space that can accommodate a solar cell (10) and a sealing member (30) may be formed in the central region of the lower layer (30), and at least one gap may be formed in an region where the sealing member (40) is arranged.

[0054] In an optional embodiment, the sealing member (40) may be arranged in an area excluding the center of the lower layer (30) so as to correspond to each of the four sides of the lower layer (30), and at this time, a first gap (t1) may be formed in an area of ​​the sealing member (40) arranged along one side of the lower layer (30). This first gap (t1) may serve as a passage through which air inside the solar cell module is discharged to the outside in the lamination step described below, and after the lamination step, the first gap (t1) may be filled by the sealing member (40) whose area is increased by being compressed. In this way, the first gap (t1) may be formed before the lamination step, so that air inside the solar cell module is discharged to the outside through the first gap (t1) in the lamination step, and the first gap (t1) may be filled by the compressed sealing member (40) after the lamination step. At this time, the first gap (t1) is filled, so that the inside of the solar cell module can be blocked from the outside.

[0055] In an optional embodiment, after the lamination step, the first gap (t1) can be filled by a sealing member (40) that is compressed and increases in area, and at this time, the sealing members (40) arranged adjacent to each other on both sides of the first gap (t1) can form a connection in the area where the area where the first gap (t1) was formed is filled and they come into contact with each other.

[0056] Meanwhile, the size of the first gap (t1) may be 1 mm to 3 mm. If the size of the first gap (t1) is less than 1 mm, it may be difficult to discharge the air inside the solar cell module to the outside, and if the size of the first gap (t1) exceeds 3 mm, there is a problem that the first gap (t1) is not filled by the sealing member (40) compressed during the lamination step, resulting in poor contact of the sealing member (40) that creates a gap.

[0057] Fig. 4 is a plan view schematically illustrating another example of the arrangement of a sealing material in the solar cell module manufacturing method of Fig. 1.

[0058] Referring to FIG. 4, the sealing member (40) can be arranged in one area excluding the center of the lower layer (30) so as to correspond to each of the four sides of the lower layer (30), and at this time, a first gap (t1) and a second gap (t2) can be formed in one area of ​​the sealing member (40) arranged along any two of the four sides of the lower layer (30), respectively. The first gap (t1) and the second gap (t2) can serve as passages through which air inside the solar cell module is discharged to the outside in the lamination step described later, and after the lamination step, the first gap (t1) and the second gap (t2) can be filled by the sealing member (40) that is compressed and has an increased area.

[0059] Meanwhile, any two sides of the lower layer (30) may be two sides of the lower layer (30) that face each other, and by forming a first gap (t1) and a second gap (t2) on each of the two sides that face each other, air inside the solar cell module can be uniformly discharged to the outside over the entire area inside the solar cell module during the lamination step.

[0060] In this way, the first gap (t1) and the second gap (t2) are formed before the lamination step, so that air inside the solar cell module is discharged to the outside through the first gap (t1) and the second gap (t2) during the lamination step, and the first gap (t1) and the second gap (t2) can be filled by the compressed sealing member (40) after the lamination step. At this time, by filling the first gap (t1) and the second gap (t2), the inside of the solar cell module can be sealed from the outside.

[0061] In an optional embodiment, after the lamination step, the first gap (t1) and the second gap (t2) can be filled by a sealing member (40) that is compressed and increases in area, and at this time, the sealing members (40) arranged adjacent to each other on both sides of the first gap (t1) can form a connection in an area where they come into contact with each other as the area where the first gap (t1) was formed is filled, and the sealing members (40) arranged adjacent to each other on both sides of the second gap (t2) can form a connection in an area where they come into contact with each other as the area where the second gap (t2) was formed is filled.

[0062] Meanwhile, the sizes of the first gap (t1) and the second gap (t2) may be 1 mm to 3 mm. If the sizes of the first gap (t1) and the second gap (t2) are less than 1 mm, it may be difficult to discharge the air inside the solar cell module to the outside, and if the sizes of the first gap (t1) and the second gap (t2) exceed 3 mm, there is a problem that the first gap (t1) and the second gap (t2) are not filled by the sealing member (40) compressed in the lamination step, and a gap is generated, resulting in poor contact of the sealing member (40).

[0063] FIG. 5 is a plan view schematically illustrating another example of the arrangement of a sealing material in the solar cell module manufacturing method of FIG. 1.

[0064] Referring to Fig. 5, the sealing member (40) may be arranged in one area excluding the center of the lower layer (30) to correspond to each of the four sides of the lower layer (30), and at this time, a first gap (t1), a second gap (t2), and a third gap (t3) may be formed in one area of ​​the sealing member (40) arranged along any three of the four sides of the lower layer (30). The first to third gaps (t 1, t 2, t3) can serve as a passage for air inside the solar cell module to be discharged to the outside in the lamination step described later, and the first to third pores (t) after the lamination step 1, t 2, t3) can be filled by a sealing member (40) that is compressed and has an increased area. In this way, the first to third gaps (t 1, t 2, t3) is formed before the lamination step and the first to third pores (t) are formed during the lamination step. 1, t 2, The air inside the solar cell module is discharged to the outside through t3), and the first to third air gaps (t) are formed by the compressed sealing member (40) after the lamination step. 1, t 2,t3) can be filled. At this time, the first to third gaps (t 1, t 2, By filling t3), the inside of the solar cell module can be blocked from the outside.

[0065] In an optional embodiment, after the lamination step, the first to third gaps (t1) to (t3) may be filled by sealing members (40) that are compressed and have an increased area. At this time, the sealing members (40) arranged adjacent to each other on both sides of the first gap (t1) may form a connection portion in the area where they come into contact with each other as the area where the first gap (t1) was formed is filled, the sealing members (40) arranged adjacent to each other on both sides of the second gap (t2) may form a connection portion in the area where they come into contact with each other as the area where the second gap (t2) was formed is filled, and the sealing members (40) arranged adjacent to each other on both sides of the third gap (t3) may form a connection portion in the area where they come into contact with each other as the area where the third gap (t3) was formed is filled.

[0066] Meanwhile, the first to third gaps (t 1, t 2, The size of the first to third pores (t3) can be 1 mm to 3 mm. 1, t 2, If the size of t3) is less than 1 mm, it may be difficult to exhaust the air inside the solar cell module to the outside, and the first to third air gaps (t 1, t 2, When the size of t3) exceeds 3 mm, the first to third pores (t) are formed by the sealing member (40) that is pressed during the lamination step. 1, t 2, There is a problem that poor contact occurs in the sealing member (40) that is not filled and a gap is created.

[0067] FIG. 6 is a plan view schematically illustrating another example of the arrangement of a sealing material in the solar cell module manufacturing method of FIG. 1.

[0068] Referring to Fig. 6, the sealing member (40) may be arranged in one area excluding the center of the lower layer (30) to correspond to each of the four sides of the lower layer (30), and at this time, a first gap (t1), a second gap (t2), a third gap (t3), and a fourth gap (t4) may be formed in one area of ​​the sealing member (40) arranged along each of the four sides of the lower layer (30). The first to fourth gaps (t 1, t 2, t 3, t4) can serve as a passage for air inside the solar cell module to be discharged to the outside in the lamination step described later, and the first to fourth pores (t) after the lamination step 1, t 2, t 3, t4) can be filled by a sealing member (40) that is compressed and has an increased area. In this way, the first to fourth gaps (t 1, t 2, t 3, t4) is formed before the lamination step and the first to fourth pores (t) are formed during the lamination step. 1, t 2, t 3, The air inside the solar cell module is discharged to the outside through the t4), and the first to fourth air gaps (t) are formed by the compressed sealing member (40) after the lamination step. 1, t 2, t 3, t4) can be filled. At this time, the first to fourth gaps (t 1, t 2, t 3, By filling t4), the inside of the solar cell module can be blocked from the outside.

[0069] In an optional embodiment, after the lamination step, the first gap (t1) to the fourth gap (t4) can be filled by a sealing member (40) whose area is increased by being compressed, and at this time, the sealing members (40) arranged adjacent to each other on both sides of the first gap (t1) can form a connection part in the area where the first gap (t1) was formed and come into contact with each other, the sealing members (40) arranged adjacent to each other on both sides of the second gap (t2) can form a connection part in the area where the second gap (t2) was formed and come into contact with each other, the sealing members (40) arranged adjacent to each other on both sides of the third gap (t3) can form a connection part in the area where the third gap (t3) was formed and come into contact with each other, and the sealing members (40) arranged adjacent to each other on both sides of the fourth gap (t4) can form a connection part in the area where the fourth gap (t4) was formed. A joint may be formed in the area where the two parts are filled and come into contact with each other.

[0070] Meanwhile, the first to fourth pores (t 1, t 2, t 3, The size of the first to third pores (t4) can be 1 mm to 3 mm. The first to fourth pores (t 1, t 2, t 3, If the size of the first to fourth pores (t4) is less than 1 mm, it may be difficult to exhaust the air inside the solar cell module to the outside, and the first to fourth pores (t 1, t 2, t 3, When the size of t4) exceeds 3 mm, the first to fourth pores (t) are formed by the sealing member (40) that is pressed during the lamination step. 1, t 2, t 3, There is a problem that poor contact occurs in the sealing member (40) that is not filled and a gap is created.

[0071] In the step (s200) of sequentially stacking a sealing material, solar cells, sealing material, and an upper layer on a lower layer on which a sealing material is arranged, when a sealing material (40) is arranged on the lower layer (30) in a form that surrounds the center of the lower layer (30) by lining along the four sides of the lower layer (30) which is a square, the sealing material (30) is arranged in the central region of the lower layer (30), a plurality of solar cells (10) are arranged on the sealing material (30), a sealing material (30) is arranged again on the plurality of solar cells (10), and an upper front layer (30) is arranged on the sealing material (30), thereby sequentially stacking can be performed.

[0072] Fig. 7 is a plan view schematically illustrating an example of a solar cell module manufactured using the solar cell module manufacturing method of Fig. 2.

[0073] Referring to FIG. 7, in the step (s300) of laminating by pressing the stacked module, the solar cell module can be sealed through a laminating process involving pressurization and heating, and at this time, the air inside the solar cell module can be discharged to the outside through a gap formed in an area of ​​a sealing member (40) lining along the inner periphery of the solar cell module, and at the same time, the sealing member (40) is compressed to increase its area and fill the gap, so that the inside of the solar cell module can be sealed off from the outside.

[0074] Meanwhile, the lamination process can be carried out at a pressure of 80 KPa to 90 KPa. If the pressure is less than 80 KPa, the sealing member (40) may not be properly compressed, which may result in poor contact of the sealing member (40), and if the pressure exceeds 90 KPa, the front layer (30) may be damaged.

[0075] Meanwhile, the solar cell module according to the embodiment of the present invention may include a perovskite solar cell as a solar cell (10) accommodated therein, and since the perovskite solar cell is weak to moisture, if air containing moisture remains inside the solar cell module, the moisture contained in the air may damage the perovskite and deteriorate the performance of the solar cell (10). Therefore, by efficiently discharging and removing the air inside the solar cell module to the outside, the performance deterioration of the solar cell module can be prevented, and further, by effectively blocking moisture penetrating into the solar cell module from the outside through the sealing member (40), damage to the perovskite solar cell due to moisture can be prevented, thereby preventing the performance deterioration of the solar cell module.

[0076]

[0077] Example 1

[0078] A square-shaped glass layer was placed at the bottom, and 1.7 mm thick butyl rubber was placed in a shape surrounding the center of the glass layer along the four sides of the glass layer, then a POE-formed encapsulating material was placed at the center of the glass layer, three solar cells were placed in parallel on the encapsulating material, and then the POE-formed encapsulating material was placed on the solar cells and laminated in sequence, and then a glass layer was placed on top and a lamination process was performed to manufacture a solar cell module.

[0079] At this time, a total of four pores were formed by forming pores in each area of ​​the butyl rubber arranged along each of the four sides of the glass layer, and all four pores were formed with a size of 1 mm.

[0080]

[0081] Example 2

[0082] It was manufactured in the same manner as Example 1, except that all four pores were formed to have a size of 2 mm.

[0083]

[0084] Example 3

[0085] It was manufactured in the same manner as Example 1, except that all four pores were formed to have a size of 3 mm.

[0086]

[0087] Comparative Example 1

[0088] It was manufactured in the same manner as Example 1, except that the gap was not formed.

[0089]

[0090] 1st pore (mm) 2nd pore (mm) 3rd pore (mm) 4th pore (mm) Residual air bubbles Comparative example 100000 Example 11111X Example 22222X Example 33333X

[0091] Table 1 shows the residual air bubbles in solar modules manufactured through a lamination process at a pressure of 85 KPa. Referring to Table 1, it can be confirmed that residual air bubbles exist in Comparative Example 1, where no air gaps were formed, and in Examples 1 to 3, where air gaps were formed to 1 mm, 2 mm, and 3 mm, it can be confirmed that no residual air bubbles exist and that all internal air has been discharged.

[0092] Figure 8 is a photograph showing a solar cell module manufactured at a pressure of 85 KPa.

[0093] Referring to Fig. 8, it can be confirmed that in the case of Example 3, a slight contact defect occurs in the butyl rubber after the lamination process.

[0094] That is, when manufacturing a solar cell module at a pressure of 85 KPa, it can be confirmed that the air inside the solar cell module was effectively removed in Examples 1 and 2, where the gap was manufactured to be 1 mm and 2 mm, respectively.

[0095]

[0096] Thickness (mm)Void (mm)11.31.51.71.92.12.300.000.000.000.000.000.000.0011.000.770.670.590.530.480.4322.001.541.331.181.050.950.8933.002.312.001.761.581.431.3044.003.082.672.352.111.901.74

[0097] Table 2 is a table showing the size of the pores compared to the thickness of the butyl rubber. Referring to Table 2, when a solar cell module is manufactured by laminating at a pressure of 85 KPa or less so that pores are formed in each area of ​​the butyl rubber arranged along each of the four sides of the glass layer, thereby forming a total of four pores, it was confirmed that air removal inside the solar cell module was excellent when the size of the pores compared to the thickness of the butyl rubber was 0.59 to 1.76, and in particular, it was confirmed that air inside the solar cell module was discharged best when the size of the pores compared to the thickness of the butyl rubber was approximately 1.18.

[0098] Meanwhile, the above results confirmed that the range of pore size settings can vary depending on the change in butyl rubber thickness at the same pressure.

[0099] As a result, the method for manufacturing a solar cell module according to an embodiment of the present invention can remove air remaining inside the solar cell module by disposing a sealing member so that at least one void is formed inside the solar cell module, thereby allowing air remaining inside the solar cell module to be discharged to the outside of the solar cell module during the lamination process.

[0100] In addition, by removing air remaining within the solar cell module, damage to the perovskite solar cell due to moisture is prevented, and performance degradation of the solar cell module is prevented, thereby improving the durability of the solar cell module.

[0101] While the present invention has been described with reference to the embodiments illustrated in the drawings, these are merely exemplary, and those skilled in the art will understand that various modifications and equivalent alternative embodiments are possible. Therefore, the true scope of technical protection of the present invention should be determined by the technical spirit of the appended claims.

[0102] The specific implementations described in the embodiments are exemplary embodiments and do not limit the scope of the embodiments in any way. For the sake of brevity of the specification, descriptions of conventional electronic components, control provision methods, software, and other functional aspects of the above provision methods may be omitted. In addition, the lines connecting or connecting members between components illustrated in the drawings are merely representative of functional connections and / or physical or circuit connections, and may be replaced or represented as various additional functional connections, physical connections, or circuit connections in an actual device. In addition, if there is no specific mention such as “essential,” “important,” etc., the component may not be absolutely necessary for the application of the present invention.

[0103] The use of the term "above" and similar referential terms in the specification of embodiments (especially in the claims) may refer to both singular and plural. Furthermore, if a range is described in the embodiments, the invention encompasses individual values ​​within the range (unless otherwise stated), and is equivalent to describing each individual value constituting the range in the detailed description. Finally, unless the order of steps constituting a method according to an embodiment is explicitly stated or otherwise stated to the contrary, the steps may be performed in any suitable order. The embodiments are not necessarily limited by the order in which the steps are described. The use of all examples or exemplary terms (e.g., "for example," etc.) in the embodiments is merely intended to describe the embodiments in detail, and the scope of the embodiments is not limited by the examples or exemplary terms, unless otherwise defined by the claims. Furthermore, those skilled in the art will recognize that various modifications, combinations, and variations may be made within the scope of the appended claims or their equivalents, depending on design conditions and factors.

[0104]

[0105] [Explanation of symbols]

[0106] 10: Solar cells

[0107] 20: Bong Ji-jae

[0108] 30: Front layer

[0109] 40: Sealing member

Claims

1. A step of arranging a sealing member so that at least one gap is formed on the inner surface of the lower layer; A step of stacking a sealing material, a solar cell, a sealing material, and an upper layer in that order on a lower layer on which a sealing member is arranged; and A method for manufacturing a solar cell module, comprising a step of laminating a stacked module by pressing it.

2. In paragraph 1, A method for manufacturing a solar cell module in which air inside the solar cell module is discharged to the outside through the gap in the laminating step.

3. In paragraph 1, The above lower layer includes a shape of a rectangle with four sides, The above sealing member is arranged along the four sides, A method for manufacturing a solar cell module, wherein the gaps are formed in each area of ​​the sealing member arranged along each of the four sides.

4. In paragraph 1, The above laminated module is a method for manufacturing a solar cell module in which the lamination is performed at a pressure of 80 KPa to 90 KPa.

5. In paragraph 1, A method for manufacturing a solar cell module wherein the size of the above-mentioned gap is 1 mm to 3 mm.

6. In paragraph 1, A method for manufacturing a solar cell module, wherein the thickness of the sealing member is 1 mm to 2.3 mm.

7. A solar cell module manufactured by the solar cell module manufacturing method of paragraph 1, solar cells; Encapsulating material placed on the upper and lower parts of the solar cell; A front layer arranged on the upper and lower parts of the above-mentioned sealing material; and A solar cell module comprising a sealing member arranged along the inner periphery of the front layer.

8. In paragraph 7, The above front layer includes a rectangular shape with four sides, The above sealing member is arranged along the four sides, A solar cell module in which the sealing members arranged along each of the four sides have connecting portions formed between the sealing members that are in contact with each other.

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