Solar cell module manufacturing method

Abstract

A method for manufacturing a solar cell module, comprising the steps of: providing a first substrate, installing a solar cell group on one side of a first region of the first substrate, installing a first encapsulant layer on a surface of the solar cell group opposite to the first substrate after installing the solar cell group on one side of the first region of the first substrate, heating a sealant material using a sealant applicator, in which a sealant layer is simultaneously applied to a portion of the surface of the edge region of the first substrate during the process of heating the sealant material using the sealant applicator, installing the sealant layer and a second substrate on the solar cell group opposite to the first substrate to complete a laminate structure, and stacking the laminate structure. The method for manufacturing a solar cell module has a simple process, improves the sealing and insulating properties of the solar cell group, reduces the probability of water vapor entering the solar cell module and causing power decay of the solar cells, and extends the life of the solar cells.

Description

[Technical Field]

[0001] This application claims priority to a Chinese patent application bearing application number 202210484042.1 and entitled "Method for manufacturing a solar cell module," filed with the China Patent Office on April 28, 2022, the entire contents of which are incorporated herein by reference.

[0002] This application relates to the field of solar cell manufacturing, and more particularly to methods for manufacturing solar cell modules. [Background technology]

[0003] In recent years, as the problems with conventional energy have become increasingly serious, new energy sources have developed rapidly, with solar energy in particular being one of the most rapidly developing energy sources. However, solar modules manufactured using conventional solar cell module manufacturing methods have problems such as stress generated by deformation of the laminated glass, insufficient adhesive strength of the adhesive film, and high water vapor permeability between the sealing silicone rubber and the adhesive film. Furthermore, when solar cell modules are used outdoors for long periods of time, the adhesive film deteriorates, reducing its adhesive strength and allowing moisture to gradually penetrate the adhesive film, adversely affecting the cells. This results in poor sealing and insulation of the solar cell module. Furthermore, when solar cell modules are used in air for long periods of time, water vapor is easily absorbed into the solar cells, resulting in a decrease in the power of the solar cells and a shortened lifespan.

[0004] As can be seen from the above, there is still room for improvement in the conventional methods for manufacturing solar cell modules. Summary of the Invention [Problem to be solved by the invention]

[0005] Therefore, the technical problem to be solved by the present application is to provide a method for manufacturing a solar cell module by overcoming the defects of conventional methods for manufacturing a solar cell module, in that the sealing and insulating properties of the solar cell module are low and water vapor easily penetrates into the solar cells, resulting in a decrease in the power of the solar cell and a shortened lifespan. [Means for solving the problem]

[0006] The present application provides a method for manufacturing a solar cell module, the method comprising the steps of: providing a first substrate including a first region and an edge region surrounding the first region; installing a solar cell group on one side of the first region of the first substrate; after installing the solar cell group on one side of the first region of the first substrate, installing a first encapsulant layer on a surface of the solar cell group opposite the first substrate; heating a sealant material using a sealant application device, wherein during the process of heating the sealant material using the sealant application device, a sealant layer is simultaneously applied to a portion of the surface of one side of the edge region of the first substrate, the sealant layer surrounding the solar cell group, the sealant layer including a central region in a width direction of the sealant layer and edge regions located on both sides of the central region, the upper surface of the central region not being higher than the upper surfaces of the edge regions; installing a second substrate on the opposite side of the sealant layer and the solar cell group opposite the first substrate; Lamination completing the structure; Lamination Structure laminate and a step of:

[0007] Optionally, the central region is recessed toward the first substrate relative to the edge region.

[0008] Optionally, the width of the sealant layer that contacts the first substrate is 80% to 100% of the maximum width of the sealant layer.

[0009] Optionally, the sealant application device includes a sealant supply tank, a sealant supply pipe, and a sealant discharge portion, the sealant supply pipe having opposing first and second ends, the first end communicating with an outlet of the sealant supply tank and the second end communicating with an inlet of the sealant discharge portion, the sealant discharge portion having a sealant discharge port, the sealant supply pipe including a flow pipe layer and a heating pipe layer surrounding the flow pipe layer, the flow pipe layer transporting the sealant material and the heating pipe layer heating the sealant material in the flow pipe layer.

[0010] Optionally, the cross-sectional shape of the sealant outlet comprises a rectangle, and during the process of applying the sealant layer, the long side of the sealant outlet is perpendicular to the application movement direction.

[0011] Optionally, the sealant supply pipe further includes a heat insulating pipe layer surrounding the heating pipe layer, and a protection pipe layer surrounding the heat insulating pipe layer.

[0012] Optionally, a metering pump is provided in the sealant discharge section, and the pressure applied by the metering pump during the process of applying the sealant layer is 6 MPa to 25 MPa.

[0013] Optionally, the linear velocity of the sealant discharge from the sealant discharge port is 100 mm / s to 500 mm / s.

[0014] Optionally, during the process of applying the sealant layer, the distance from the sealant outlet to the first substrate is 0.3 mm to 2.2 mm.

[0015] Optionally, the sealant application device further includes a first heating unit and a second heating unit, and the step of heating the sealant material using the sealant application device includes the step of heating the sealant supply tank using the first heating unit and the step of heating the heating pipe layer using the second heating unit.

[0016] Optionally, the temperature to which the first heating unit heats the sealant supply tank is between 100°C and 230°C.

[0017] Optionally, the temperature at which the second heating unit heats the heating tube layer is 100°C to 230°C.

[0018] Optionally, the sealant application device further includes a first booster pump, and during the process of heating the sealant material using the sealant application device, the first booster pump is used to pressurize the sealant material in the sealant supply tank, and the pressure applied by the first booster pump is 6 MPa to 25 MPa.

[0019] Optionally, the sealant applicator further includes a second relay booster pump installed in the pipeline of the sealant supply pipe between the first end and the second end, and in the process of heating the sealant material using the sealant applicator, the pressure applied by the second relay booster pump is 6 MPa to 25 MPa.

[0020] Optionally, the sealant application device further includes a third heating unit, and in the process of heating the sealant material using the sealant application device, the third heating unit heats the sealant material injected into the sealant discharge portion, and the temperature to which the third heating unit heats the sealant material in the sealant discharge portion is 100°C to 230°C.

[0021] Optionally, the sealant application device further includes a fourth heating unit, which heats the sealant material injected into the second relay booster pump, and the temperature to which the fourth heating unit heats the sealant material injected into the second relay booster pump is 100°C to 230°C.

[0022] Optionally, the method further includes a step of providing a second encapsulant layer on the surface of the first region of the first substrate before providing a solar cell group on one side of the first region of the first substrate, wherein the step of providing a solar cell group on one side of the first region of the first substrate is a step of providing the solar cell group on a side of the second encapsulant layer opposite to the first substrate, Lamination The structure further comprises a second encapsulant layer, Lamination In the process of laminating the structure, the second encapsulant layer laminate The method further includes the step of:

[0023] Optionally, said Lamination Structure laminate Before this, the inner sidewall of the sealant layer is spaced apart from the sidewall of the first encapsulant layer, the sidewall of the solar cell group, and the sidewall of the second encapsulant layer.

[0024] Selectably, the spacing is between 0.1 mm and 5.0 mm.

[0025] Optionally, said Lamination Before laminating the structure, the thickness of the sealant layer is 0.5 mm to 2.0 mm, and the width of the sealant layer is 5 mm to 12 mm.

[0026] Optionally, the material of the sealant layer comprises butyl rubber.

[0027] Optionally, said Lamination The parameters for laminating the structure are a temperature of 130°C to 150°C, a lamination time of 10 to 20 minutes, a lamination pressure value of -50 kPa to 0 kPa, and a vacuum level of 30 Pa to 200 Pa in the chamber of the laminator used.

[0028] Optionally, a sealing frame having a receiving chamber is provided, and the first substrate, the solar cell group, the first encapsulant layer, the second encapsulant layer, and the second substrate are arranged in the sealing frame. laminate and stacked body forming the Lamination Structure laminate and stacked bodyAfter forming the laminate, a sealant is formed on the surface of the inner wall of the storage chamber, and body The edge region of the substrate is fitted into the receiving chamber.

[0029] Optionally, the sealant material comprises butyl rubber.

[0030] Optionally, the method further includes a step of performing defect detection on the solar cell group before installing a first encapsulant layer on the surface of the solar cell group opposite the first substrate and after installing the solar cell group on one side of the first region of the first substrate.

[0031] Optionally, before installing a second substrate on the side of the solar cell group opposite the sealant layer and the first substrate, a lead wire hole is formed that penetrates the second substrate and the first encapsulant layer, the solar cell group including adjacent solar cell strings connected in parallel via a bus bar, the solar cell string including adjacent solar cells that are sequentially connected in series via an interconnect bar, the bus bar passing through the lead wire hole, and the method for manufacturing the solar cell module further includes, in the step of installing a second substrate on the side of the solar cell group opposite the sealant layer and the first substrate, extending the bus bar through the lead wire hole to a side of the second substrate opposite the first encapsulant layer, and forming a seal filler in the lead wire hole after installing the solar cell group on one side of the first region of the first substrate and before installing the second substrate on the side of the solar cell group opposite the sealant layer and the first substrate.

[0032] Optionally, the seal filler material comprises butyl rubber. [Effects of the Invention]

[0033] The technical solution of the present application has the following beneficial effects:

[0034] According to the method for manufacturing a solar cell module of the present application, a sealant layer is applied to a portion of one surface of the edge region of the first substrate during a process of heating a sealant material using a sealant application device, and the heated sealant layer improves adhesion between the sealant layer and the first substrate. By directly applying the sealant layer to a portion of one surface of the edge region of the first substrate using a sealant application device, many intermediate steps are unnecessary and the process is simplified. Before the second substrate is installed, the sealant layer includes a central region in the width direction of the sealant layer and edge regions located on both sides of the central region. The top surface of the central region is not higher than the top surfaces of the edge regions, thereby preventing gaps from forming between the edge region on the side facing the solar cell group in the central region and the sidewall of the solar cell group. Because the adhesion between the sealant layer and the first substrate is improved and gaps are avoided between the edge region of the central region facing the solar cell group and the sidewalls of the solar cell group, the sealant layer can better prevent the material of the first encapsulant layer from overflowing, improving the sealing and insulating properties of the sealant layer and better preventing water vapor and leaking electricity from entering the solar cells. This not only ensures the safety of the solar cell module but also reduces the probability of water vapor entering the solar cell module and causing power decay in the solar cells, thereby extending the life of the solar cells.

[0035] Furthermore, the central region is recessed towards the first substrate relative to the edge region, thus reducing the process difficulty.

[0036] Furthermore, since the width of the sealant layer in contact with the first substrate is 80% to 100% of the maximum width of the sealant layer, the contact area between the sealant layer and the first substrate is large, the sealant layer adheres uniformly to the first substrate, the pattern of the sealant layer is stable, and the sealant applicator can continuously apply the sealant layer to ensure the continuity of the sealant layer, thereby improving the adhesion between the first substrate, solar cell group, first encapsulant layer, and second substrate after lamination.

[0037] Furthermore, defect detection can be performed on the solar cell group before a second encapsulant layer is installed on the surface of the solar cell group opposite the first substrate and after the solar cell group is installed on one side of the first region of the first substrate, and before the second substrate is installed, thereby enabling defect detection on the solar cell group in advance. In this way, the amount of repetitive rework can be reduced, rework efficiency can be significantly improved, and this is advantageous for reducing labor costs, improving production line utilization rate and production efficiency, and reducing rework costs.

[0038] Furthermore, a sealing frame having a receiving chamber is provided, and the first substrate, the solar cell group, and the second substrate are laminated together. body The method for manufacturing the solar cell module includes the steps of forming a sealant on the surface of the inner wall of the housing chamber, and body and fitting the edge region of the solar cell module into the receiving chamber, wherein the sealant material includes butyl rubber. Because butyl rubber has good chemical stability, thermal stability, and electrical insulation properties, as well as high airtightness and watertightness, applying a certain thickness of butyl rubber around the periphery of the solar cell module during the manufacturing process of the solar cell module can improve the watertightness of the solar cell module, provide additional protection, and provide the solar cell module with good sealing and insulation properties.

[0039] Furthermore, before installing a second substrate on the side of the solar cell group opposite the sealant layer and the first substrate, a lead wire hole is formed through the second substrate and the first encapsulant layer, and in the step of installing the second substrate on the side of the solar cell group opposite the sealant layer and the first substrate, a bus bar is extended through the lead wire hole to the side of the second substrate opposite the first encapsulant layer, and after installing the solar cell group on one side of the first region of the first substrate and before installing the second substrate on the side of the solar cell group opposite the sealant layer and the first substrate, a sealing filler is formed in the lead wire hole, and the material of the sealing filler includes butyl rubber, which has good chemical stability, thermal stability, and electrical insulation, as well as high airtightness and watertightness, and can effectively prevent water vapor from entering the interior of the solar cell through the lead wire hole, which is advantageous for improving the sealing and insulation of the solar cell module.

[0040] In order to more clearly describe the specific embodiments of the present application or the technical solutions of the prior art, the following will briefly describe the drawings that need to be used to describe the specific embodiments or the prior art. It is obvious that the drawings described below are some embodiments of the present application, and those skilled in the art can obtain other drawings based on these drawings without any creative work. [Brief explanation of the drawings]

[0041] [Figure 1] 1 is a flowchart of a method for manufacturing a solar cell module according to an embodiment of the present application. [Figure 2] 1 is a structural schematic diagram of a solar cell module according to an embodiment of the present application before being stacked; [Figure 3] FIG. 2 is a bottom view of a second substrate according to an embodiment of the present application. [Figure 4] FIG. 2 is a partial vertical cross-sectional view schematically illustrating a second substrate according to an embodiment of the present invention. [Figure 5] FIG. 2 is a schematic vertical cross-sectional view of a laminated structure after sealing according to an embodiment of the present application. DETAILED DESCRIPTION OF THE INVENTION

[0042] The technical solutions of the present application will be described below clearly and completely with reference to the drawings, and it is obvious that the described embodiments are only some of the embodiments of the present application, but not all of the embodiments, and all other embodiments that a person skilled in the art can obtain without creative efforts based on the embodiments of the present application fall within the scope of protection of the present application.

[0043] In the description of this application, it should be understood that orientations or positional relationships indicated by terms such as "center," "up," "down," "left," "right," "vertical," "horizontal," "inside," and "outside" are orientations or positional relationships based on the drawings, are intended merely to explain and simplify the description of this application, and do not indicate or imply that such devices or elements necessarily have a particular orientation or are constructed and operated in a particular orientation, and are not intended to limit the present application. It should also be understood that the terms "first," "second," and "third" are used for descriptive purposes only, and do not indicate or imply relative importance.

[0044] In the description of this application, unless otherwise clearly specified or limited, the terms "attached," "coupled," and "connected" should be understood in a broad sense, and may refer to, for example, a fixed connection, a detachable connection, or an integral connection, a mechanical connection, an electrical connection, a direct connection, an indirect connection via an intermediate medium, or internal communication between two elements. Those skilled in the art can understand the specific meanings of the above terms in this application according to specific circumstances.

[0045] Furthermore, the technical features according to different embodiments of the present application described below can be combined with each other as long as they are not inconsistent with each other.

[0046] Referring to FIGS. 1 and 2, the method for manufacturing a solar cell module according to the present application includes the following steps: Step S1: providing a first substrate 101 including a first region and an edge region surrounding the first region; Step S2: placing a solar cell group 102 on one side of the first region of the first substrate 101; Step S3: after a solar cell group 102 is disposed on one side of a first region of the first substrate 101, a first encapsulant layer 104 is disposed on a surface of the solar cell group 102 opposite to the first substrate 101; a step S4 of heating a sealant material using a sealant applicator, in which a sealant layer 200 is simultaneously applied to a portion of one side surface of the edge region of the first substrate 101 during the process of heating the sealant material using the sealant applicator, the sealant layer 200 surrounding the solar cell group 102, the sealant layer including a central region in a width direction of the sealant layer and edge regions located on both sides of the central region, and an upper surface of the central region is not higher than an upper surface of the edge regions; Step S5: installing a second substrate 103 on the sealant layer 200 and the solar cell group 102 opposite to the first substrate 101 to complete a stacked structure; and step S6 of laminating the layered structure.

[0047] In the method for manufacturing a solar cell module according to this embodiment, a sealant layer is applied to a portion of one surface of the edge region of the first substrate 101 during a process of heating a sealant material using a sealant application device, and the sealant layer 200 is a heated sealant layer, thereby improving adhesion between the sealant layer 200 and the first substrate 101. The sealant layer is directly applied to a portion of one surface of the edge region of the first substrate 101 using a sealant application device, eliminating the need for many intermediate steps, reducing costs and simplifying the process. Before the second substrate 103 is installed, the sealant layer 200 includes a central region in the width direction of the sealant layer and edge regions located on both sides of the central region. The top surface of the central region is not higher than the top surfaces of the edge regions, thereby preventing gaps from forming between the edge region of the central region facing the solar cell group 102 and the sidewalls of the solar cell group 102. Because the adhesion between the sealant layer 200 and the first substrate 101 is improved and gaps are avoided between the edge region of the central region facing the solar cell group 102 and the sidewalls of the solar cell group 102, the sealant layer 200 can better prevent the material from overflowing from the first encapsulant layer 104, improve the sealing and insulating properties of the sealant layer 200, and better prevent water vapor and leaked electricity from entering the solar cells. This not only ensures the safety of the solar cell module, but also reduces the probability of water vapor entering the solar cell module and causing power decay in the solar cells, and extends the life of the solar cells.

[0048] The first area is suitable for disposing the solar cell group 102 .

[0049] At this time, the stacked structure includes the first substrate 101 , the solar cell group 102 , the first encapsulant layer 104 , the second substrate 103 and the sealant layer 200 .

[0050] The width direction of the sealant layer 200 is parallel to the direction of the first substrate 101 and the second substrate 103 .

[0051] In one embodiment, the central region is recessed towards the first substrate 101 relative to the edge regions, thus reducing the process difficulty.

[0052] In other embodiments, the central region of the sealant layer 200 is flush with the edge regions of the sealant layer 200 .

[0053] The sealant layer 200 includes a central region, a first sub-edge region facing the solar cell group 102, and a second sub-edge region opposite the solar cell group 102. The second sub-edge region surrounds the central region of the sealant layer 200, and the central region of the sealant layer 200 surrounds the second sub-edge region of the sealant layer 200.

[0054] In one embodiment, the width of the sealant layer 200 in contact with the first substrate 101 is 80% to 100% of the maximum width of the sealant layer 200, for example, 82%. Therefore, the contact area between the sealant layer 200 and the first substrate 101 is large, the sealant layer is uniformly attached to the first substrate, the pattern of the sealant layer is stable, the sealant application device can continuously apply the sealant layer to ensure the continuity of the sealant layer, and the adhesion of the first substrate 101, solar cell group 102, first encapsulant layer 104, and second substrate 103 after stacking can be improved.

[0055] In one embodiment, the sealant application device includes a sealant supply tank, a sealant supply pipe, and a sealant discharge portion, the sealant supply pipe having opposing first and second ends, the first end communicating with an outlet of the sealant supply tank, the second end communicating with an inlet of the sealant discharge portion, and the sealant discharge portion having a sealant discharge port.

[0056] In one embodiment, the method further includes a step of evacuating the sealant application device before applying the sealant layer 200 to a portion of one side surface of the edge region of the first substrate 101, the purpose of which is to remove air bubbles and voids within the sealant application device and prevent the sealant from being discontinuous when being dispensed.

[0057] In this embodiment, two sealant supply tanks are used, which is advantageous for realizing continuous supply of sealant.

[0058] In one embodiment, the cross-sectional shape of the sealant outlet is rectangular. During the process of applying the sealant layer, the long side of the sealant outlet is perpendicular to the application direction, and the cross-sectional shape of the sealant outlet is rectangular. In this way, the pattern of the sealant layer, for example, the straightness of the sealant layer pattern, can be effectively controlled. The rectangular cross-sectional shape of the sealant outlet not only favors the interconnection of the first and second sealant layers, but also favors the appearance of the formed sealant layer, allows flexible adjustment of the sealant application height, favors control of the sealant dispensing amount, and favors control of the flatness of the sealant application. In another embodiment, the cross-sectional shape of the sealant outlet may further include a flattened oval. In one embodiment, the sealant supply pipe includes a flow pipe layer and a heating pipe layer surrounding the flow pipe layer. The flow pipe layer transports the sealant material and heats the sealant material in the flow pipe layer.

[0059] In one embodiment, the sealant supply pipe further includes a heat insulating pipe layer surrounding the heating pipe layer and a protective pipe layer surrounding the heat insulating pipe layer, the heat insulating pipe layer having a multi-layer heat insulating structure and made of a high-temperature resistant heat insulating material, thereby improving heating efficiency and reducing heat loss.

[0060] A temperature sensor is further disposed within the sealant supply pipe, thereby providing precise temperature control for the sealant material within the sealant supply pipe.

[0061] In one embodiment, a metering pump is installed in the sealant dispensing section, and the metering pump includes a pressure sensor capable of monitoring the pressure of the sealant supply and sealant dispensing, and the metering pump can further accurately control the sealant dispensing amount, and the accuracy of the sealant dispensing amount is controlled to 0.5% to 1.5%, for example 1%.

[0062] In other embodiments, the sealant dispenser may further include other devices capable of controlling and monitoring flow rate by varying air pressure.

[0063] In one embodiment, during the process of applying the sealant layer, the pressure applied by the metering pump is 6 MPa to 25 MPa, for example, 15 MPa. If the pressure applied by the metering pump is less than 6 MPa, the power provided to the sealant is too small, making it difficult to achieve continuous supply of the sealant. If the pressure applied by the metering pump is more than 25 MPa, the power provided to the sealant is too large, making it possible for the sealant to have too high a fluidity, resulting in difficulty in controlling the rate at which the sealant is formed and the shape of the formed sealant.

[0064] In one embodiment, the linear velocity of the sealant discharge from the sealant discharge port is 100 mm / s to 500 mm / s, for example 200 mm / s. If the linear velocity of the sealant discharge from the sealant discharge port is less than 100 mm / s, the sealant discharge speed from the sealant discharge port is too slow and the thickness of the formed sealant layer is too large, which makes it easy for sealant to overflow during lamination and results in waste of resources. If the linear velocity of the sealant discharge from the sealant discharge port is greater than 500 mm / s, the sealant discharge speed from the sealant discharge port is too fast and the thickness of the formed sealant layer is too small. If the sealant layer is too thin, it may not be possible to create a completely sealed environment for the finally formed solar cell group and the effect of blocking water vapor is poor.

[0065] In one embodiment, during the process of applying the sealant layer, the distance from the sealant outlet to the first substrate is 0.3 mm to 2.2 mm, for example 2.0 mm. If the distance from the sealant outlet to the first substrate is less than 0.3 mm, the degree to which the upper surface of the central region of the sealant layer is not higher than the upper surface of the edge region is small. If the distance from the sealant outlet to the first substrate is greater than 2.2 mm, it is difficult to control the shape of the formed sealant layer due to the influence of gravity.

[0066] In one embodiment, the sealant application device further includes a first heating unit and a second heating unit, and the step of heating the sealant material using the sealant application device includes the step of heating the sealant supply tank using the first heating unit and the step of heating the heating tube layer using the second heating unit.

[0067] In one embodiment, the temperature to which the first heating unit heats the sealant supply tank is 100°C to 230°C, for example 160°C. If the first heating unit heats the sealant supply tank to a temperature below 100°C, the temperature to which the sealant in the sealant supply tank is heated is too low, and the degree of improvement in the fluidity of the sealant is small. If the first heating unit heats the sealant supply tank to a temperature above 230°C, the fluidity of the sealant is too high, and it is difficult to control the rate at which the sealant is formed. If the temperature is too high, it is difficult to control the shape of the sealant layer. If the temperature exceeds the sealant's operating temperature, the sealant will decompose, resulting in the sealant becoming ineffective and unable to fulfill its sealing protection role.

[0068] In one embodiment, the second heating unit heats the heating pipe layer to a temperature between 100°C and 230°C, for example, 160°C. If the second heating unit heats the heating pipe layer to a temperature below 100°C, the temperature to which the sealant in the sealant supply pipe is heated is too low, and the improvement in the fluidity of the sealant is small. If the second heating unit heats the heating pipe layer to a temperature above 230°C, the fluidity of the sealant is too high, and it is difficult to control the rate at which the sealant is formed. If the temperature is too high, it is difficult to control the shape of the sealant layer. If the sealant temperature exceeds its operating temperature, the sealant will decompose, resulting in the sealant becoming ineffective and unable to fulfill its sealing protection role.

[0069] In one embodiment, the sealant applicator further comprises a first booster pump.

[0070] The method for manufacturing a solar cell module further includes a step of pressurizing the sealant material in the sealant supply tank using the first booster pump during the process of heating the sealant material using a sealant application device, and the pressure applied by the first booster pump is 6 MPa to 25 MPa, for example 15 MPa. If the pressure applied by the first booster pump is less than 6 MPa, the power provided to the sealant is too small, and the degree to which the sealant can be continuously supplied is too small. If the pressure applied by the first booster pump is more than 25 MPa, the power provided to the sealant is too large, and the fluidity of the sealant may be too high, resulting in difficulty in controlling the formation speed of the sealant.

[0071] In one embodiment, the sealant application device further includes a second relay booster pump installed in the line of the sealant supply pipe between the first end and the second end.

[0072] The method for manufacturing a solar cell module further includes a step of using the second relay booster pump to apply a pressure of 6 MPa to 25 MPa, for example 15 MPa, during the process of heating the sealant material using a sealant application device. If the pressure applied by the second relay booster pump is less than 6 MPa, the power provided to the sealant is too small, and the degree to which the sealant can be continuously supplied is too small. If the pressure applied by the second relay booster pump is greater than 25 MPa, the power provided to the sealant is too large, and the fluidity of the sealant may be too high, resulting in difficulty in controlling the formation rate of the sealant.

[0073] In one embodiment, the pressure that the flow pipe layer can withstand is greater than the pressure that the heating pipe can withstand, and the pressure that the flow pipe layer can withstand is 30 MPa to 35 MPa, for example 32 MPa, and the pressure that the heating pipe can withstand is 6 MPa to 20 MPa, for example 10 MPa.

[0074] In one embodiment, the sealant applicator further includes a third heating unit.

[0075] The method for manufacturing a solar cell module further includes, in the process of heating the sealant material using a sealant applicator, a step of using the third heating unit to heat the sealant material injected into the sealant discharge section, wherein the temperature to which the third heating unit heats the sealant material in the sealant discharge section is 100°C to 230°C, for example 160°C. If the temperature to which the third heating unit heats the sealant material in the sealant discharge section is less than 100°C, the temperature to which the sealant material in the sealant discharge section is heated is too low, and the degree of improvement in the fluidity of the sealant is too small. If the temperature to which the third heating unit heats the sealant material in the sealant discharge section is greater than 230°C, the fluidity of the sealant is too high, making it difficult to control the rate at which the sealant is formed. If the temperature is too high, it is difficult to control the shape of the sealant layer. If the sealant temperature exceeds its operating temperature, the sealant will decompose, resulting in the sealant becoming ineffective and unable to fulfill its sealing protection role.

[0076] In one embodiment, the sealant applicator further includes a fourth heating unit, which heats the sealant material to be injected into the second relay booster pump. The fourth heating unit heats the sealant material to a temperature between 100°C and 230°C, for example, 160°C. If the fourth heating unit heats the sealant material to a temperature below 100°C, the temperature to which the sealant material to be injected into the second relay booster pump is heated is too low, and the improvement in the fluidity of the sealant is too small. If the fourth heating unit heats the sealant material to a temperature above 230°C, the fluidity of the sealant is too high, making it difficult to control the rate at which the sealant is formed. If the temperature is too high, it is difficult to control the shape of the sealant layer. If the sealant temperature exceeds its operating temperature, the sealant will decompose, resulting in the sealant becoming ineffective and unable to fulfill its sealing protection function.

[0077] In one embodiment, still referring to FIG. 2 , before installing the solar cell group 102 on one side of the first region of the first substrate 101, the method further includes a step of installing a second encapsulant layer 105 on the surface of the first region of the first substrate 101, and the step of installing the solar cell group 102 on one side of the first region of the first substrate 101 is a step of installing the solar cell group 102 on the side of the second encapsulant layer 105 opposite the first substrate 101, and the laminated structure further includes the second encapsulant layer 105.

[0078] In one embodiment, the laminated structure laminate In the process of forming the second sealing material layer 105 laminate The method further includes the step of:

[0079] In one embodiment, the difference between the width of the first encapsulant layer 104 and the width of the second encapsulant layer 105 is less than 2.0 mm, the difference between the width of the first encapsulant layer 104 and the width of the second encapsulant layer 105 is less than 1.0 mm, the difference between the width of the first encapsulant layer 104 and the width of the solar cell group 102 is less than 2.0 mm, and the difference between the width of the second encapsulant layer 105 and the width of the solar cell group 102 is less than 2.0 mm. This is advantageous for improving the installation accuracy and positional stability of the sealant layer, and improves the sealing performance of the solar cell module.

[0080] In one embodiment, Lamination Structure laminate Before this, the inner sidewall of the sealant layer 200 is spaced apart from the sidewall of the first encapsulant layer 104, the sidewall of the solar cell group 102, and the sidewall of the second encapsulant layer 105, respectively.

[0081] In one embodiment, with continued reference to FIG. 2, specifically, Lamination Before laminating the structure, the distance L1 between the inner wall of the sealant layer 200 and the side wall of the first encapsulant layer 104 is 0.1 mm to 5.0 mm, for example, 2.5 mm, 3.5 mm, or 4.5 mm. If the distance L1 between the inner wall of the sealant layer 200 and the side wall of the first encapsulant layer 104 is less than 2.0 mm, the sealant layer may overflow onto the first encapsulant layer during the lamination process. If the distance L1 between the inner wall of the sealant layer 200 and the side wall of the first encapsulant layer 104 is greater than 5.0 mm, the finally formed solar cell module may have voids between the sealant layer and the first encapsulant layer, making it easy for air bubbles to form, which may adversely affect the appearance and weather resistance of the solar cell module.

[0082] In one embodiment, still referring to FIG. 2, the laminated structure is specifically laminateBefore this, the distance L1 between the inner wall of the sealant layer 200 and the side wall of the solar cell group is 0.1 mm to 5.0 mm, for example, 2.5 mm, 3.5 mm, or 4.5 mm. If the distance L1 between the inner wall of the sealant layer 200 and the side wall of the solar cell group is greater than 5.0 mm, there will be gaps between the sealant layer and the solar cell group in the finally formed solar cell module, which will easily cause bubbles to form, and this may adversely affect the appearance and weather resistance of the solar cell module.

[0083] In one embodiment, still referring to FIG. 2, the laminated structure is specifically laminate Before this, the distance L1 between the inner wall of the sealant layer 200 and the side wall of the second encapsulant layer 105 is 0.1 mm to 5.0 mm, for example, 2.5 mm, 3.5 mm, or 4.5 mm. If the distance L1 between the inner wall of the sealant layer 200 and the side wall of the second encapsulant layer 105 is greater than 5.0 mm, there will be voids between the sealant layer and the second encapsulant layer in the finally formed solar cell module, making it easy for bubbles to form, which may adversely affect the appearance and weather resistance of the solar cell module.

[0084] In one embodiment, continuing to refer to FIG. 2, specifically, before laminating the laminated structure, the distance L2 between the outer wall of the sealant layer 200 and the side wall of the first substrate 101 is 0.1 mm to 5.0 mm, for example, 2.5 mm, 3.5 mm, or 4.5 mm. If the distance L2 between the outer wall of the sealant layer 200 and the side wall of the first substrate 101 is less than 0.1 mm, sealant overflow is likely to occur after lamination, resulting in resource waste and an unattractive solar cell module. If the distance L2 between the outer wall of the sealant layer 200 and the side wall of the first substrate 101 is greater than 5.0 mm, there will be gaps at the edges of the solar cell module formed after lamination, resulting in little improvement in the sealing and insulation properties of the solar cell group.

[0085] In one embodiment, still referring to FIG. 2, specifically, before laminating the stacked structure, the thickness T of the sealant layer 200 is 0.5 mm to 2.0 mm, for example, 1.0 mm, 1.2 mm, or 1.5 mm. If the thickness of the sealant layer is less than 0.5 mm, the sealant layer may be too thin to create a completely sealed environment for the solar cell group and may have little effect in blocking water vapor. If the thickness of the sealant layer is more than 2.0 mm, the sealant layer may be too thick, making it easy for sealant to overflow during the stacking process, resulting in resource waste.

[0086] In one embodiment, still referring to FIG. 2, specifically, before laminating the stacked structure, the width W of the sealant layer 200 is 5.0 mm to 12.0 mm, for example, 6.5 mm, 7.5 mm, or 8.5 mm. If the width of the sealant layer is less than 5.0 mm, the sealant layer has little effect in preventing water vapor and dust in the environment from passing through the sealant layer and entering the solar cell group. If the width of the sealant layer is greater than 12.0 mm, the sealant layer is too wide, and overflow of the sealant layer may occur during lamination, resulting in waste.

[0087] In one embodiment, the sealant layer 200 comprises butyl rubber. The butyl rubber material contains isobutylene and a small amount of isoprene, and the butyl rubber has good chemical and thermal stability, as well as high airtightness and watertightness. The butyl rubber molecular chains in the butyl rubber have closely spaced side methyl groups, limiting the thermal activity of the polymer molecules, resulting in low breathability and high airtightness. The air permeability of the butyl rubber is only 1 / 7 that of natural rubber and 1 / 5 that of styrene-butadiene rubber, while the water vapor permeability of the butyl rubber is 1 / 200 that of natural rubber and 1 / 140 that of styrene-butadiene rubber. Table 1 compares the water vapor permeability of the butyl rubber in this embodiment with that of conventional solar module encapsulants. The water vapor permeability of the butyl rubber is significantly lower than that of conventional solar module encapsulants.

[0088] [Table 1]

[0089] The butyl rubber vulcanizate in the butyl rubber has excellent heat resistance, and the service temperature of the resin-vulcanized butyl rubber can reach 150°C to 200°C. Therefore, the butyl rubber has good heat stability. The butyl rubber molecular structure in the butyl rubber has a lack of double bonds and a high distribution density of side chain methyl groups. The spatial structure of the butyl rubber molecular chain is helical, with a high methyl content and high elasticity, making it highly resistant to vibration and impact energy. The rebound characteristics of the butyl rubber are less than 20% over a wide temperature range, and therefore the butyl rubber has a high ability to withstand mechanical forces and good low-temperature resistance. The high saturation of the butyl rubber molecular chain in the butyl rubber gives it excellent ozone resistance and weather resistance, which are 10 times that of styrene-butadiene rubber. The highly saturated structure of the butyl rubber in the butyl rubber gives it high chemical stability, excellent corrosion resistance, high electrical insulation and corona resistance, and a volume resistivity 10 to 100 times higher than that of natural rubber. The butyl rubber in the butyl rubber contains silica as a filler and sulfur or insoluble sulfur as a vulcanizing agent. The physical properties, UV resistance, heat aging resistance, and moist heat resistance are all significantly improved. The butyl rubber has very low water permeability and very high physical properties, UV resistance, heat aging resistance, and moist heat resistance.

[0090] In one embodiment, the solar cell group 102 includes a plurality of solar cell strings connected in parallel, and the solar cell strings include a plurality of solar cells connected in series.

[0091] In one embodiment, the solar cell may be of various types, including but not limited to TOPCon (tunnel oxide passivation contact solar cell), PERC (emitter and rear surface passivation solar cell), perovskite cell or HJT (heterojunction solar cell), and may be an imbrication, not limited thereto.

[0092] In one embodiment, the thickness of the first encapsulant layer 104 is 0.2 mm to 1.0 mm, for example 0.7 mm, the thickness of the second encapsulant layer 105 is 0.2 mm to 1.0 mm, for example 0.7 mm, and the thickness of the solar cell group 102 is 0.10 mm to 0.20 mm, for example 0.15 mm.

[0093] In this embodiment, the first substrate 101 has a single-layer structure, and the material of the first substrate 101 includes glass, while in another embodiment, the first substrate has a multi-layer structure, and the first substrate includes a laminated protective layer, an insulating layer, and an adhesive layer, the insulating layer is located between the adhesive layer and the protective layer, the adhesive layer is adhered to the first encapsulant layer, the material of the protective layer includes polyvinylidene fluoride, the material of the insulating layer includes polyethylene terephthalate, and the material of the adhesive layer includes polyolefin. The first substrate plays a role in protecting and supporting the solar cell group.

[0094] In one embodiment, the material of the second substrate 103 includes glass, and in other embodiments, the material of the second substrate may further include other flexible backplanes or optically transparent materials.

[0095] In one embodiment, the method for manufacturing the solar cell module further includes a step of installing a second encapsulant layer 105 on the surface of the first region of the first substrate 101 before installing the solar cell group 102 on one side of the first region of the first substrate 101, and the material of the second encapsulant layer 105 includes ethylene and vinyl acetate copolymer such as EVA adhesive film. In another embodiment, the material of the second encapsulant layer may further include other materials with adhesive properties and optical transparency such as EPE / POE / PVB.

[0096] In one embodiment, the step of installing the solar cell group 102 on one side of the first region of the first substrate 101 is a step of installing the solar cell group 102 on the side of the first encapsulant layer 104 opposite the first substrate 101, and after installing the solar cell group 102 on one side of the first region of the first substrate 101, the first encapsulant layer 104 is installed on the side of the solar cell group 102 opposite the first substrate 101, and the material of the first encapsulant layer 104 includes ethylene and vinyl acetate copolymer such as EVA adhesive film, and in another embodiment, the material of the second encapsulant layer may further include other materials with adhesive properties and optical transparency such as EPE / POE / PVB.

[0097] In one embodiment, during the process of stacking the first substrate 101, the solar cell group 102, the first encapsulant layer 104, and the second substrate 103, the first encapsulant layer 104 and the second encapsulant layer 105 are further stacked.

[0098] In one embodiment, the parameters for laminating the stacked structure are a stacking temperature of 130°C to 150°C, for example 140°C. If the stacking temperature is lower than 130°C, the degree of cross-linking between the sealant layer and the first and second substrates will be insufficient. If the stacking temperature is higher than 150°C, the sealant layer will become fluid and will easily flow out of the solar cell module. If the temperature is too high, it may have an adverse effect on the properties of the first substrate, solar cell group, and second substrate.

[0099] In one embodiment, the parameters for laminating the stacked structure are a stacking time of 10 to 20 minutes, for example 15 minutes. If the stacking time is less than 10 minutes, the stacking time is insufficient, and as a result, the degree of improvement in the adhesive strength between the sealant layer and the first and second substrates may be low. If the stacking time is more than 20 minutes, the stacking time is too long, and the manufacturing efficiency of the solar cell module decreases.

[0100] In one embodiment, the parameters for laminating the stacked structure are a stacking pressure value of -50 kPa to 0 kPa, for example -10 kPa. If the stacking pressure value is less than -50 kPa, the pressure is too high, which may result in fragments of the solar cells in the solar cell group. If the stacking pressure value is greater than 0 kPa, the stacking pressure is insufficient, which may result in a low degree of improvement in the adhesive strength between the sealant layer and the first and second substrates.

[0101] In one embodiment, the parameters for laminating the laminated structure include a vacuum degree of 20 Pa to 200 Pa, for example 100 Pa, and if the vacuum degree of lamination is less than 20 Pa, gas discharge from within the solar cell module is insufficient, and air bubbles are likely to form between the sealant layer and the first and second substrates, adversely affecting the appearance and weather resistance of the solar cell module.

[0102] In one embodiment, the first substrate 101, the solar cell group 102, the first encapsulant layer 104, the second encapsulant layer 105, and the second substrate 103 are laminated together. body The forming equipment includes a laminator.

[0103] 3 and 4 , in one embodiment, before the sealant layer 200 and the second substrate 103 are installed on the opposite side of the solar cell group 102 from the first substrate 101, a lead wire hole K is formed through the second substrate 103 and the first encapsulant layer 104. The solar cell group 102 includes adjacent solar cell strings connected in parallel via bus bars, and the solar cell strings include adjacent solar cells connected in series in sequence via interconnection bars, and the bus bars pass through the lead wire hole K.

[0104] The method for manufacturing the solar cell module further includes, in the step of installing the sealant layer 200 and the second substrate 103 on the side of the solar cell group 102 opposite the first substrate 101, a step of extending a bus bar through the lead wire hole K to the side of the second substrate 103 opposite the first sealing material layer 104, and a step of forming a sealing filler 300 in the lead wire hole K after installing the solar cell group 102 on one side of the first region of the first substrate 101 and before installing the sealant layer 200 and the second substrate 103 on the side of the solar cell group 102 opposite the first substrate 101.

[0105] In one embodiment, the material of the seal filler 300 includes butyl rubber, and in other embodiments, the material of the seal filler may further include other materials that have good chemical stability, thermal stability, and electrical insulation properties, and have high airtightness and watertightness.

[0106] In one embodiment, the method for manufacturing the solar cell module further includes a step of performing defect detection on the solar cell group 102 before installing a first encapsulant layer 104 on the surface of the solar cell group 102 opposite the first substrate 101 and after installing the solar cell group 102 on one side of the first region of the first substrate 101.

[0107] Before the second encapsulant layer 105 is installed on the surface of the solar cell group 102 opposite the first substrate 101, and after the solar cell group 102 is installed on one side of the first region of the first substrate 101, defect detection can be performed on the solar cell group, and defect detection can be performed on the solar cell group in advance before the second substrate is installed.In this way, the amount of repetitive rework work can be reduced, rework efficiency can be greatly improved, and this is beneficial to reducing labor costs, improving production line utilization rate and production efficiency, and reducing rework costs.

[0108] Performing defect detection on the solar cell group includes one or more of appearance detection, crack detection, and incomplete soldering detection, where the appearance detection detects whether the solar cell group is damaged, the crack detection detects whether there are debris on solar cells in the solar cell group, and the incomplete soldering detection detects whether there are incomplete soldering between solar cells in the solar cell group and solder ribbons.

[0109] In one embodiment, when performing the external appearance detection on the solar cell group, if the external appearance of the solar cell group is damaged, for example, if the solar cell group is detected as damaged, it is necessary to replace a new solar cell group until the solar cell group passes inspection.

[0110] In another embodiment, if debris is detected in a solar cell in the solar cell group when performing the crack detection on the solar cell group, the solar cell group with the debris needs to be reworked until the solar cell group passes inspection.

[0111] In another embodiment, when the incomplete soldering detection is performed on the solar cell group, if it is detected that there is incomplete soldering between a solar cell and a solder ribbon in the solar cell group, it is necessary to re-solder the location where there is incomplete soldering between the solar cell and the solder ribbon until the solar cell group passes inspection.

[0112] In the prior art, the rework rate for solar cell modules is 15% to 20%, and a large amount of manpower is required for the rework work. The solar cell module manufacturing method of this embodiment reduces the amount of repetitive rework work, significantly improves rework efficiency, and can reduce the number of workers by one to two, thereby reducing labor costs.

[0113] In one embodiment, the method for manufacturing the solar cell module, referring to FIG. 5, includes the steps of providing a sealing frame 400 having a receiving chamber, and disposing the first substrate 101, the solar cell group 102, the first encapsulant layer 104, and the second substrate 103. laminate and stacked body and forming 100.

[0114] In one embodiment, the sealing frame 400 includes an aluminum alloy frame. In other embodiments, the sealing frame may further include a sealing frame made of other materials that can perform the sealing function.

[0115] In one embodiment, Lamination Structure laminate and stacked body After forming the laminate, a sealant 401 is formed on the surface of the inner wall of the chamber. body The edge region of 100 is fitted into the chamber.

[0116] In one embodiment, the material of the sealant 401 includes butyl rubber. In other embodiments, the material of the sealant may further include other materials that have good chemical stability, thermal stability, and electrical insulation properties, and have high airtightness and watertightness.

[0117] Butyl rubber has good chemical stability, thermal stability and electrical insulation, and is also highly airtight and watertight, so it can effectively prevent water vapor from entering the interior of the solar cell through the lead wire holes, which is advantageous for improving the sealing and insulation of the solar cell module and ensuring the safety of the solar cell module. It is also advantageous for reducing power decay of the solar cell due to water vapor entering the solar cell module, preventing a decrease in the amount of power generated by the solar cell and extending the life of the solar cell.

[0118] It is apparent that the above examples are merely illustrative and do not limit the embodiments. Those skilled in the art can make various other changes and modifications based on the above description. It is not necessary or possible to list all the embodiments here. Any obvious changes and modifications derived therefrom are also within the scope of protection of the present invention. [Explanation of symbols]

[0119] 101 First board 102 Solar Cell Group 103 Second board 104 First encapsulant layer 105 Second encapsulant layer 200 sealant layer W width T Thickness L1 distance L2 distance K Lead wire hole 300 Seal Filler 100 stacked body 400 Sealing Frame 401 Sealant

Claims

1. A method for manufacturing a solar cell module, comprising: providing a first substrate including a first region and a first edge region surrounding the first region; placing a solar cell group on one side of the first region of the first substrate; After disposing the solar cell group on one side of the first region of the first substrate, disposing a first encapsulant layer on a surface of the solar cell group away from the first substrate; a step of heating a sealant material using a sealant applicator, wherein simultaneously with the process of heating the sealant material using the sealant applicator, a sealant layer is applied to a portion of one surface of the first edge region of the first substrate, the sealant layer including a central region in a width direction of the sealant layer and edge regions of the sealant layer located on both sides of the central region, the central region being applied so as to be recessed toward the first substrate relative to the edge regions of the sealant layer, the sealant applicator including a sealant supply tank, a sealant supply pipe, and a sealant discharge unit, the sealant discharge unit having a sealant discharge outlet, the distance between the sealant discharge outlet and the first substrate being set in a range of 0.3 mm to 2.2 mm during the process of applying the sealant layer, the sealant layer surrounding the solar cell group, and the upper surface of the central region being lower than the upper surface of the edge regions of the sealant layer; placing a second substrate on the sealant layer and the solar cell group away from the first substrate to complete the stack; and laminating the layered structure.

2. 2. The method for manufacturing a solar cell module according to claim 1, wherein the width of the sealant layer that contacts the first substrate is 80% to 100% of the maximum width of the sealant layer.

3. the sealant supply pipe has opposing first and second ends, the first end communicating with an outlet of the sealant supply tank and the second end communicating with an inlet of the sealant discharge portion; 2. The method for manufacturing a solar cell module according to claim 1, wherein the sealant supply pipe includes a flow pipe layer and a heating pipe layer surrounding the flow pipe layer, the flow pipe layer transporting the sealant material and the heating pipe layer heating the sealant material in the flow pipe layer.

4. a metering pump is provided in the sealant discharge portion, and the pressure applied by the metering pump during the process of applying the sealant layer is in the range of 6 MPa to 25 MPa; 2. The method for manufacturing a solar cell module according to claim 1, wherein the linear velocity of the sealant discharged from the sealant discharge port is in the range of 100 mm / s to 500 mm / s.

5. the sealant applicator further includes a first heating unit and a second heating unit; the step of heating the sealant material using the sealant application device includes the steps of heating the sealant supply tank using the first heating unit and heating the heating tube layer using the second heating unit; 4. The method for manufacturing a solar cell module according to claim 3, wherein the temperature to which the first heating unit heats the sealant supply tank is 100 to 230 degrees Celsius.

6. the sealant applicator further includes a first booster pump, and in the process of heating the sealant material using the sealant applicator, the first booster pump pressurizes the sealant material in the sealant supply tank, and the pressure applied by the first booster pump is within a range of 6 MPa to 25 MPa; the sealant applicator further includes a second relay booster pump installed in a pipeline of the sealant supply pipe between the first end and the second end, and in the process of heating the sealant material using the sealant applicator, the pressure applied by the second relay booster pump is within a range of 6 MPa to 25 MPa; the sealant applicator further includes a third heating unit, and in the process of heating the sealant material using the sealant applicator, the sealant material introduced into the sealant discharge portion is heated by the third heating unit, and the sealant material in the sealant discharge portion is heated to 100°C to 230°C by the third heating unit; 4. The method for manufacturing a solar cell module according to claim 3, wherein the sealant application device further comprises a fourth heating unit, the fourth heating unit heats the sealant material introduced into the second relay booster pump, and the sealant material introduced into the second relay booster pump is heated to 100°C to 230°C by the fourth heating unit.

7. before disposing a solar cell group on one side of the first region of the first substrate, disposing a second encapsulant layer on the surface of the first substrate in the first region; the step of disposing the solar cell group on one side of the first region of the first substrate is a step of disposing the solar cell group on a side of the second encapsulant layer away from the first substrate, and the stacked structure further includes the second encapsulant layer; The process of laminating the laminated structure further includes a step of laminating the second sealing material layer, 7. The method for manufacturing a solar cell module according to claim 1, wherein, before laminating the stacked structure, the inner wall of the sealant layer is spaced apart from the side wall of the first encapsulant layer, the side wall of the solar cell group, and the side wall of the second encapsulant layer, the space being 0.1 mm to 5.0 mm.

8. Before laminating the laminated structure, the thickness of the sealant layer is 0.5 mm to 2.0 mm, and the width of the sealant layer is 5 mm to 12 mm; The method for manufacturing a solar cell module according to claim 7 , wherein the material of the sealant layer contains butyl rubber.

9. 8. The method for manufacturing a solar cell module according to claim 7, wherein parameters for laminating the stacked structure are a temperature of 130°C to 150°C, a lamination time of 10 minutes to 20 minutes, a lamination pressure of -50 kPa to 0 kPa, and a vacuum degree in a chamber of the laminator used of 30 Pa to 200 Pa.

10. providing a sealing frame having a receiving chamber, and laminating the first substrate, the solar cell group, the first encapsulant layer, the second encapsulant layer, and the second substrate to form a stack; After laminating the laminated structure to form a laminate, a sealant is formed on the surface of the inner wall of the storage chamber, and an edge region of the laminate is fitted into the storage chamber; 8. The method for manufacturing a solar cell module according to claim 7, wherein the material of the sealant contains butyl rubber.

11. 2. The method for manufacturing a solar cell module according to claim 1, further comprising the step of performing defect detection on the solar cell group before placing a first encapsulant layer on the surface of the solar cell group away from the first substrate and after placing the solar cell group on one side of the first region of the first substrate.

12. forming a lead hole penetrating the second substrate and the first encapsulant layer before placing the sealant layer and a second substrate on the side of the solar cell group away from the first substrate; the solar cell group includes adjacent solar cell strings connected in parallel via bus bars, the solar cell strings include adjacent solar cells connected in series in sequence via interconnection bars, and the bus bars pass through the lead wire holes; the method for manufacturing a solar cell module further includes, in the step of installing a second substrate on a side of the sealant layer and the solar cell group away from the first substrate, a step of extending a bus bar through the lead wire hole to a side of the second substrate away from the first sealing material layer; and a step of forming a seal filler in the lead wire hole after installing the solar cell group on one side of the first region of the first substrate and before installing the second substrate on the side of the sealant layer and the solar cell group away from the first substrate, 8. The method for manufacturing a solar cell module according to claim 7, wherein the material of the sealing filler includes butyl rubber.

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