Photovoltaic module and manufacturing method

Abstract

The invention relates to the field of photovoltaic technology, and discloses a photovoltaic module, which comprises a waterproof sealing ring, and front glass, a front adhesive film, a battery piece layer, a back adhesive film and back glass which are sequentially stacked from bottom to top, the centers of the front glass, the front adhesive film, the battery piece layer, the back adhesive film and the back glass are positioned on the same straight line, and the sides of the front glass, the front adhesive film, the battery piece layer, the back adhesive film and the back glass are parallel. The front surface of the waterproof sealing ring is adhered to the back surface of the front glass, the inner side surface of the waterproof sealing ring is adhered to the outer side surfaces of the front adhesive film, the battery piece layer, the back adhesive film and the back glass, and the waterproof sealing ring is used for preventing water vapor from entering the adhesive films through gaps, so that the water vapor cannot enter the adhesive films through the gaps; and the photovoltaic module can be better protected. In addition, the invention also provides a manufacturing method of the photovoltaic module, before the front adhesive film, the battery piece layer, the back adhesive film and the back glass are laid, the isolation gasket is laid on the front glass, so that the overflowing adhesive film can be prevented from being bonded, and the cutting and cleaning of the adhesive film cross-linked substance are facilitated.

Description

Technical Field

[0001] The present invention relates to the field of photovoltaic technology, and in particular to a photovoltaic component and a manufacturing method thereof. Background Art

[0002] Photovoltaic modules are the core and most important part of solar power generation systems. Photovoltaic modules mainly include nine core components: photovoltaic panels, interconnection bars, bus bars, glass, EVA, backplane, aluminum alloy, silicone, and junction boxes. For photovoltaic modules with half-cell structure, the photovoltaic panel should be cut in half to halve the battery operating current, significantly reducing the electrical loss on the welding strip.

[0003] The existing N-type packaging of photovoltaic modules mainly adopts POE (polyolefin elastomer) film on the front and EVA (ethylene-vinyl acetate copolymer) film on the back for single glass, and EPE (EVA+POE+EVA three-layer co-extrusion) film on the front and EPE film on the back or EPE film on the front and EVA film on the back for single glass of double glass modules. The main reason is to prevent water vapor from entering and causing EVA hydrolysis, resulting in the electrical attenuation effect (PID). The cost of POE and EPE is much higher than that of EVA, and the lamination temperature is high (145℃) during production, which is not conducive to energy saving and consumption reduction.

[0004] The prior art discloses a photovoltaic module and a manufacturing method thereof, including tempering the pre-prepared glass; forming a reflective film on the surface of the tempered glass by a thermal transfer process or a thermal spraying process to obtain a back glass substrate; obtaining a front glass substrate; sequentially stacking a first adhesive film layer, a cell layer, a second adhesive film layer, and a back glass substrate on the surface of the front glass substrate to obtain a photovoltaic module, wherein the reflective film faces the second adhesive film layer, and the cell layer includes a plurality of double-sided cells. The first adhesive film layer of the patent is an EVA adhesive film layer or a POE adhesive film layer, and the second adhesive film layer is an EVA adhesive film layer or a POE adhesive film layer. The EVA adhesive film is easily hydrolyzed, has a high water vapor permeability, and is prone to PID failure problems. Summary of the invention

[0005] The purpose of the present invention is to provide a photovoltaic module with good waterproof performance and a manufacturing method thereof.

[0006] In order to achieve the above-mentioned purpose, the present invention provides a photovoltaic module, comprising a waterproof sealing ring and a front glass, a front film, a battery layer, a back film and a back glass stacked in sequence from bottom to top, the front film, the battery layer, the back film and the back glass have the same area and shape, the front glass and the back glass have the same shape, the area of ​​the front glass is greater than the area of ​​the back glass, the centers of the front glass, the front film, the battery layer, the back film and the back glass are located on the same straight line, and the side edges of the front film, the battery layer, the back film and the back glass are parallel to the side edges of the front glass, the waterproof sealing ring is located on the front glass, and the waterproof sealing ring is sleeved on the front film, the battery layer, the back film and the back glass, the inner side surfaces of the waterproof sealing ring are bonded to the outer side surfaces of the front film, the battery layer, the back film and the back glass, and the front side of the waterproof sealing ring is bonded to the back side of the front glass.

[0007] As a preferred solution, the waterproof sealing ring is a high water-resistance silicone or butyl rubber ring.

[0008] As a preferred solution, the front adhesive film and the back adhesive film are both EVA films.

[0009] As a preferred solution, the distance between the edge of the back glass and the edge of the front glass is 1-2 mm, and the thickness of the waterproof sealing ring is equal to the distance between the edge of the back glass and the edge of the front glass.

[0010] As a preferred solution, the front glass, the front adhesive film, the battery layer, the back adhesive film and the back glass are all rectangular.

[0011] The present invention also provides a method for manufacturing a photovoltaic module, comprising the following steps:

[0012] S1. Manufacturing front glass, battery layer and back glass of the same shape, wherein the areas of the battery layer and the back glass are equal, and the area of ​​the front glass is larger than that of the back glass;

[0013] S2. Lay the front glass, front film, battery layer, back film and back glass in order from bottom to top, so that the centers of the front glass, battery layer and back glass are located on the same straight line, and the sides of the front glass, battery layer and back glass are parallel;

[0014] S3. Conduct EL testing and laminate products without hidden cracks;

[0015] S4, cutting off the residual cross-linked adhesive film along the edge of the back glass;

[0016] S5. Clean the back of the front glass, the front film, the battery layer, the back film and the side of the back glass;

[0017] S6. Coat a layer of waterproof sealant along the edge of the rear glass to form a waterproof seal ring that is bonded to the front film, the battery layer, the rear film, the side of the rear glass, and the back of the front glass;

[0018] S7, the components obtained in step S6 are framed and installed with junction boxes, and then cured and cleaned, tested for power, insulation withstand voltage, and EL, and finally packaged and put into storage.

[0019] As a preferred solution, in step S2, before laying the front adhesive film, an isolation gasket is first laid on the front glass. The inner ring shape and size of the isolation gasket are the same as those of the back glass. The isolation gasket is used to prevent the front adhesive film and the back adhesive film from overflowing to the part where the projections of the front glass and the back glass do not overlap.

[0020] As a preferred solution, the isolation gasket is a thin sheet frame-type tooling made of high-temperature cloth or a material that is not adhesive to the film.

[0021] As a preferred solution, in step S6, the waterproof sealant is high water-resistance silicone or butyl sealant.

[0022] As a preferred solution, in step S2, both the front adhesive film and the back adhesive film are EVA films.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] The front glass, front film, battery layer, back film and back glass of the present invention have the same shape, but the area of ​​the front glass is larger, and when stacked, the centers of the front glass, front film, battery layer, back film and back glass are located on the same straight line and the side edges are parallel, so that the uncovered part of the back of the front glass forms a ring that can carry a waterproof sealing ring. The front side of the waterproof sealing ring is bonded to the back of the front glass, and the inner side is bonded to the front film, battery layer, back film and outer side of the back glass. The waterproof sealing ring is used to prevent the entry of water vapor and prevent water vapor from entering the film through the gap, so as to better protect the photovoltaic module. Moreover, in the manufacturing method of the present invention, before laying the front adhesive film, the battery cell layer, the back adhesive film and the back glass, an isolation gasket is first laid on the front glass to prevent the adhesive film from adhering to the edge of the front glass during laying or lamination, so that the waterproof sealing ring is more tightly bonded to the front glass, the front adhesive film, the battery cell layer, the back adhesive film and the back glass, thereby achieving a better waterproof effect and facilitating the cutting of the adhesive film cross-linked material and the cleaning of the waterproof sealing ring before laying. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic structural diagram of a photovoltaic module according to an embodiment of the present invention.

[0026] Figure 2 It is a flow chart of a method for manufacturing a photovoltaic module according to an embodiment of the present invention.

[0027] Figure 3 It is a production process flow chart of the prior art.

[0028] Figure 4 It is a production process flow chart of the photovoltaic module manufacturing method according to an embodiment of the present invention.

[0029] Figure 5 It is a schematic diagram of the stacking of components of the photovoltaic module manufacturing method according to an embodiment of the present invention.

[0030] Figure 6 It is a structural schematic diagram of an isolation gasket in a photovoltaic module manufacturing method according to an embodiment of the present invention.

[0031] Figure 7 It is a schematic diagram of the first viewing angle after lamination of the photovoltaic module manufacturing method according to an embodiment of the present invention.

[0032] Figure 8 It is a schematic diagram from a second viewing angle after lamination of the photovoltaic module manufacturing method according to an embodiment of the present invention.

[0033] In the figure, 1-front glass; 2-front adhesive film; 3-cell layer; 4-back adhesive film; 5-back glass; 6-waterproof sealing ring; 7-isolation gasket; 8-residual adhesive film cross-linked material; 9-frame; 10-frame adhesive layer. DETAILED DESCRIPTION

[0034] The specific implementation of the present invention is further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0035] In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0036] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0037] Furthermore, in the description of the present invention, unless otherwise specified, “plurality” means two or more.

[0038] Embodiment 1

[0039] like Figure 1 As shown, a photovoltaic module according to a preferred embodiment of the present invention comprises a waterproof sealing ring 6 and a front glass 1, a front adhesive film 2, a battery layer 3, a back adhesive film 4 and a back glass 5 stacked in sequence from bottom to top, the front adhesive film 2, the battery layer 3, the back adhesive film 4 and the back glass 5 have the same area and shape, the front glass 1 and the back glass 5 have the same shape, the area of ​​the front glass 1 is larger than the area of ​​the back glass 5, the centers of the front glass 1, the front adhesive film 2, the battery layer 3, the back adhesive film 4 and the back glass 5 are located on the same straight line, and the side edges of the front adhesive film 2, the battery layer 3, the back adhesive film 4 and the back glass 5 are parallel to the side edges of the front glass 1, the waterproof sealing ring 6 is located on the front glass 1, and the waterproof sealing ring 6 is sleeved on the front adhesive film 2, the battery layer 3, the back adhesive film 4 and the back glass 5, the inner side surfaces of the waterproof sealing ring 6 are bonded to the outer side surfaces of the front adhesive film 2, the battery layer 3, the back adhesive film 4 and the back glass 5, and the front side of the waterproof sealing ring 6 is bonded to the back side of the front glass 1. The front glass 1, front film 2, battery cell layer 3, back film 4 and back glass 5 of this embodiment have the same shape, but the area of ​​the front glass 1 is larger, and when stacked, the centers of the front glass 1, front film 2, battery cell layer 3, back film 4 and back glass 5 are located on the same straight line and the side edges are parallel, so that the uncovered part of the back of the front glass 1 forms a ring that can carry a waterproof sealing ring 6. The front side of the waterproof sealing ring 6 is bonded to the back of the front glass 1, and the inner side is bonded to the outer side of the front film 2, battery cell layer 3, back film 4 and back glass 5. The waterproof sealing ring 6 is used to prevent the entry of water vapor and prevent water vapor from entering the film through the gap, so as to better protect the photovoltaic module.

[0040] Optionally, the waterproof seal ring 6 is a high water-resistance silicone or butyl rubber ring. In this embodiment, after the front glass 1, the front adhesive film 2, the battery layer 3, the back adhesive film 4 and the back glass 5 are stacked from bottom to top, and the front glass 1 and the battery layer 3 are bonded by the front adhesive film 2, the battery layer 3 and the back glass 5 are bonded by the back adhesive film 4, and the front glass 1, the front adhesive film 2, the battery layer 3, the back adhesive film 4 and the back glass 5 are aligned in the center, the front adhesive film 2, the battery layer 3, the back adhesive film 4 and the back glass 5 form a layer platform, and a waterproof sealant layer is coated on the periphery of the layer platform to form a waterproof seal ring 6.

[0041] In addition, the front adhesive film 2 and the back adhesive film 4 of this embodiment are both EVA films. The packaging adhesive film adopts EPE or POE, which is costly, and the lamination temperature of the POE adhesive film is high and consumes a lot of energy. Therefore, this embodiment adopts double EVA film packaging, which is low in cost, and the lamination temperature can be reduced from 145°C to 140°C, and the energy consumption of the laminator is reduced. However, the use of double EVA film packaging will bring about a high water vapor permeability, and N-type batteries are sensitive to acid. Water vapor causes EVA to decompose and produce acetic acid to corrode the grid line of the battery, causing the battery cell to fail. Therefore, the waterproof sealing ring 6 of this embodiment can solve the above problems well. The layer platform structure and sealing mechanism designed in this embodiment can better protect the photovoltaic module and prevent water vapor from entering the EVA layer through the gap. Therefore, the layer platform structure and sealing mechanism designed in this embodiment have a good waterproof effect, which enables the photovoltaic module to use double EVA film, which not only has a good waterproof effect, but also reduces costs.

[0042] In this embodiment, the distance between the edge of the back glass 5 and the edge of the front glass 1 is 1-2 mm, and the thickness of the waterproof sealing ring 6 is equal to the distance between the edge of the back glass 5 and the edge of the front glass 1 .

[0043] Specifically, the front glass 1, the front film 2, the battery layer 3, the back film 4 and the back glass 5 are all rectangular. Therefore, the length of the front glass 1 is 1 to 2 mm greater than the length of the front film 2, the battery layer 3, the back film 4 and the back glass 5, and the width of the front glass 1 is 1 to 2 mm greater than the width of the front film 2, the battery layer 3, the back film 4 and the back glass 5.

[0044] In this embodiment, the photovoltaic module also includes a frame 9, and the front glass 1, the front adhesive film 2, the battery layer 3, the back adhesive film 4, the back glass 5 and the waterproof sealing ring 6 are inserted into the frame 9 after being bonded together, and the front glass 1, the side of the waterproof sealing ring 6, the back of the waterproof sealing ring 6 and the back glass 5 are bonded to the frame 9 through a frame bonding layer 10.

[0045] Embodiment 2

[0046] like Figures 2 to 8As shown, the embodiment of the present invention preferably provides a method for manufacturing a photovoltaic module, comprising the following steps:

[0047] S1, manufacturing a front glass 1, a battery layer 3 and a back glass 5 of the same shape, wherein the areas of the battery layer 3 and the back glass 5 are equal, and the area of ​​the front glass 1 is larger than the area of ​​the back glass 5;

[0048] S2, laying the front glass 1, the front adhesive film 2, the battery layer 3, the back adhesive film 4 and the back glass 5 in order from bottom to top, so that the centers of the front glass 1, the battery layer 3 and the back glass 5 are located on the same straight line, and the sides of the front glass 1, the battery layer 3 and the back glass 5 are parallel;

[0049] S3. Conduct EL testing and laminate products without hidden cracks;

[0050] S4, cutting off the residual film cross-linked material 8 along the edge of the back glass 5;

[0051] S5, cleaning the back side of the front glass 1, the front adhesive film 2, the battery layer 3, the back adhesive film 4 and the side of the back glass 5;

[0052] S6, coating a layer of waterproof sealant along the edge of the back glass 5 to form a waterproof sealing ring 6 that is bonded to the front adhesive film 2, the battery layer 3, the back adhesive film 4 and the side of the back glass 5 and the back of the front glass 1;

[0053] S7, frame the components obtained in step S6, install the junction box, and then perform curing cleaning, power testing, insulation withstand voltage testing, EL testing, and finally packing and storage.

[0054] Through the above method, the front adhesive film 2, the battery layer 3, the back adhesive film 4 and the back glass 5 of this embodiment form a layer platform structure located in the center of the front glass 1, and then a circle of waterproof sealant is applied around the layer platform and on the back of the front glass 1 to form a waterproof sealing ring 6, which can play a waterproof role and prevent water vapor from contacting the EVA, thereby achieving the purpose of protecting the components.

[0055] Optionally, in step S6, the waterproof sealant is a high water-resistance silicone or butyl glue. In step S2, the front film 2 and the back film 4 are both EVA films. Design a layer platform structure, apply sealant on it, isolate the film from contact with the air, ensure that water vapor cannot contact and react with the film, so that the reliability of the component is improved and the occurrence of PID effect is weakened. In addition, the encapsulation adopts double-layer EVA film encapsulation and sealant edge sealing, which can reduce the cost of the film and reduce the lamination temperature by 3 to 5°C.

[0056] Embodiment 3

[0057] The difference between this embodiment and the second embodiment is that, based on the second embodiment, this embodiment further illustrates the manufacturing method.

[0058] In step S2 of this embodiment, before laying the front adhesive film 2, an isolation gasket 7 is first laid on the front glass 1. The inner ring shape and size of the isolation gasket 7 are the same as those of the back glass 5. The isolation gasket 7 is used to prevent the front adhesive film 2 and the back adhesive film 4 from overflowing to the part where the projections of the front glass 1 and the back glass 5 do not overlap.

[0059] Isolation gasket 7 Figure 6 As shown, the front glass 1, the front adhesive film 2, the battery layer 3, the back adhesive film 4 and the back glass 5 are all rectangular, so the isolation gasket 7 is a rectangular frame. The outer edge contour of the isolation gasket 7 is consistent with the shape and size of the front glass 1, and the inner circle contour is consistent with the shape and size of the back glass 5. This ensures that the adhesive film will not adhere to the front glass 1 in the part where the back glass 5 and the front glass 1 do not overlap, which is convenient for the subsequent process to cut the overflowing part of the adhesive film. The residual adhesive film cross-linked material 8 overflowing during lamination will overflow on the isolation gasket 7. Therefore, cutting is performed along the edge of the back glass 5, and then the isolation gasket 7 is removed to clean the residual adhesive film cross-linked material 8, so as to prepare for the subsequent coating of sealant. The isolation gasket 7 of this embodiment is a thin sheet frame-type tooling made of high-temperature cloth or a material that is not adhesive to the adhesive film.

[0060] Specifically, Figure 7 and Figure 8 As shown, in step S3, after lamination, the adhesive film overflows to form a residual adhesive film cross-linked product 8. In step S4, a mechanical knife is used to cut along the edge of the back glass 5, and then the residual adhesive film cross-linked product 8 is taken out together with the isolation gasket 7. The isolation gasket 7 will not adhere to the residue, and the isolation gasket 7 can be reused. After the lamination process is completed, the cutting process is to cut off the remaining excess adhesive film of the layer platform structure along the contour of the back glass 5 to facilitate subsequent glue coating and sealing. After the cutting is completed, the residual adhesive film is removed and the isolation gasket 7 is removed, and the glue coating process is entered. The sealant is applied to the layer platform structure along the back glass 5 to wrap around the laminated component. The thickness is about 3mm, the width is consistent with the layer platform width, and the height completely covers the adhesive film layer and the back glass 5, so as to achieve the purpose of isolating the air.

[0061] The process flow of the prior art is shown in 3, and the process flow of this embodiment is shown in Figure 4As shown. The process flow of this embodiment includes slicing and serial welding, front glass 1 loading, isolation layer laying, front adhesive film 2 cutting and laying, typesetting, bus bar welding, back adhesive film 4 cutting and laying, back panel or back glass 5 laying, front EL detection, lamination, cutting, sealant coating, frame 9 installation, junction box installation, curing and cleaning, power test (IV test), insulation withstand voltage test, post EL test, and packaging and warehousing. Compared with the prior art, this embodiment adds the process of laying the isolation gasket 7 and coating the waterproof sealant, reduces the corner cutting process, and in terms of equipment, adds a laying device and a glue coating device, reduces one corner cutting machine, and reduces the cost of production line equipment.

[0062] The other steps of this embodiment are the same as those of the second embodiment and will not be described again here.

[0063] In summary, the embodiment of the present invention provides a photovoltaic module, wherein the front glass 1, the front adhesive film 2, the battery layer 3, the back adhesive film 4 and the back glass 5 have the same shape, but the area of ​​the front glass 1 is large, and when stacked, the centers of the front glass 1, the front adhesive film 2, the battery layer 3, the back adhesive film 4 and the back glass 5 are located on the same straight line and the sides are parallel, so that the uncovered part of the back of the front glass 1 forms a ring that can carry a waterproof sealing ring 6, the front of the waterproof sealing ring 6 is bonded to the back of the front glass 1, and the inner side is bonded to the outer side of the front adhesive film 2, the battery layer 3, the back adhesive film 4 and the back glass 5, and the waterproof sealing ring 6 is used to prevent the entry of water vapor, and prevent water vapor from entering the adhesive film through the gap, so as to better protect the photovoltaic module. In addition, the embodiment of the present invention also provides a method for manufacturing the above-mentioned photovoltaic module, in which an isolation gasket 7 is used to facilitate the cutting of the residual adhesive film cross-linked material 8 and the cleaning layer structure, which is conducive to the subsequent coating of the waterproof sealing ring 6.

[0064] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention. These improvements and substitutions should also be regarded as the scope of protection of the present invention.

Claims

1. A photovoltaic module, characterized in that: The invention comprises a waterproof sealing ring (6) and a front glass (1), a front adhesive film (2), a battery layer (3), a back adhesive film (4) and a back glass (5) which are stacked in sequence from bottom to top, wherein the front adhesive film (2), the battery layer (3), the back adhesive film (4) and the back glass (5) have the same area and shape, the front glass (1) and the back glass (5) have the same shape, the area of ​​the front glass (1) is larger than the area of ​​the back glass (5), the centers of the front glass (1), the front adhesive film (2), the battery layer (3), the back adhesive film (4) and the back glass (5) are located on the same straight line, and the front glass (1), the front adhesive film (2), the battery layer (3), the back adhesive film (4) and the back glass (5) are located on the same straight line. The side edges of the adhesive film (2), the battery cell layer (3), the back adhesive film (4) and the back glass (5) are parallel to the side edges of the front glass (1); the waterproof sealing ring (6) is located on the front glass (1), and the waterproof sealing ring (6) is sleeved outside the front adhesive film (2), the battery cell layer (3), the back adhesive film (4) and the back glass (5); the inner side surface of the waterproof sealing ring (6) is bonded to the outer side surface of the front adhesive film (2), the battery cell layer (3), the back adhesive film (4) and the back glass (5); and the front side of the waterproof sealing ring (6) is bonded to the back side of the front glass (1).

2. The photovoltaic module according to claim 1, characterized in that: The waterproof sealing ring (6) is a high water-resistance silica gel or butyl rubber ring.

3. The photovoltaic module according to claim 1, characterized in that: The front adhesive film (2) and the back adhesive film (4) are both EVA films.

4. The photovoltaic module according to claim 1, characterized in that: The distance between the edge of the back glass (5) and the edge of the front glass (1) is 1 to 2 mm, and the thickness of the waterproof sealing ring (6) is equal to the distance between the edge of the back glass (5) and the edge of the front glass (1).

5. The photovoltaic module according to claim 1, characterized in that: The front glass (1), the front adhesive film (2), the battery layer (3), the back adhesive film (4) and the back glass (5) are all rectangular.

6. A method for manufacturing a photovoltaic module, characterized in that: The following steps are involved: S1. Manufacturing a front glass (1), a battery layer (3), and a back glass (5) of the same shape, wherein the areas of the battery layer (3) and the back glass (5) are equal, and the area of ​​the front glass (1) is greater than the area of ​​the back glass (5); S2, laying the front glass (1), the front adhesive film (2), the battery layer (3), the back adhesive film (4) and the back glass (5) in order from bottom to top, so that the centers of the front glass (1), the battery layer (3) and the back glass (5) are located on the same straight line, and the sides of the front glass (1), the battery layer (3) and the back glass (5) are parallel; S3. Conduct EL testing and laminate products without hidden cracks; S4, cutting off the residual adhesive film cross-linked material (8) along the edge of the rear glass (5); S5, cleaning the back side of the front glass (1) and the front adhesive film (2), the battery layer (3), the back adhesive film (4) and the side of the back glass (5); S6, coating a layer of waterproof sealant along the edge of the back glass (5) to form a waterproof seal ring (6) that is bonded to the front adhesive film (2), the battery layer (3), the back adhesive film (4) and the side of the back glass (5) as well as the back of the front glass (1); S7, the components obtained in step S6 are framed (9), the junction box is installed, and then cured and cleaned, power tested, insulation withstand voltage tested, EL tested, and finally packaged and stored.

7. The method for manufacturing a photovoltaic module according to claim 6, characterized in that: In step S2, before laying the front adhesive film (2), an isolation gasket (7) is first laid on the front glass (1). The inner ring shape and size of the isolation gasket (7) are the same as those of the back glass (5). The isolation gasket (7) is used to prevent the front adhesive film (2) and the back adhesive film (4) from overflowing to the part where the projections of the front glass (1) and the back glass (5) do not overlap.

8. The method for manufacturing a photovoltaic module according to claim 7, characterized in that: The isolation gasket (7) is a sheet frame-type tooling made of high-temperature cloth or a material that is not adhesive to the film.

9. The method for manufacturing a photovoltaic module according to claim 6, characterized in that: In step S6, the waterproof sealant is high water-resistance silicone or butyl sealant.

10. The method for manufacturing a photovoltaic module according to claim 6, characterized in that: In step S2, the front adhesive film (2) and the back adhesive film (4) are both EVA films.

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