Photovoltaic module and preparation method thereof

Abstract

The invention discloses a photovoltaic module and a preparation method thereof, and relates to the technical field of photovoltaic module manufacturing, and the photovoltaic module comprises a laminated member and a frame wrapping the edge of the laminated member. The laminated piece is formed by laminating a laminated piece and a welding piece arranged at a part or all of the edge area of the laminated piece through a laminating machine; the welding part comprises a first welding part at least connected with the edge of the cover plate and a second welding part at least connected with the edge of the back plate; the first welding part extends from the front edge of the cover plate to the side surface of the laminated piece, and comprises a first part corresponding to the side edge of the laminated piece and a second part corresponding to the front edge of the cover plate; the second welding part extends from the back edge of the back plate to the side surface of the laminated piece, and comprises a fourth part corresponding to the back edge of the back plate and a third part corresponding to the side edge of the laminated piece; the frame is fixedly connected with the first welding part and the second welding part. According to the photovoltaic module, the use of a lamination frame is omitted, and the material cost in the lamination process is greatly reduced.

Description

Technical Field

[0001] This invention relates to the field of photovoltaic module manufacturing technology, and in particular to a photovoltaic module and a method for preparing a photovoltaic module. Background Technology

[0002] In the current photovoltaic (PV) module manufacturing process, lamination frames are installed around the perimeter of the laminated components before lamination. These frames provide height support to the edges of the laminated components during lamination, preventing excessive compression that could cause cell breakage. After lamination, the frames must be removed to obtain the laminated components used in the PV module manufacturing process. Therefore, current technology relies on the repeated use of lamination frames to complete the lamination process for different components. However, lamination frames are consumables and are easily damaged during repeated use. Furthermore, different sizes of PV modules require different sizes of lamination frames, making lamination using frames costly. Summary of the Invention

[0003] In view of this, embodiments of the present invention provide a photovoltaic module and a method for manufacturing a photovoltaic module. By providing welding parts in part or all of the edge areas of the laminate, the welding parts include a first welding part connected to the cover plate and a second welding part connected to the back plate. The first welding part and the second welding part can be used to protect the edge of the laminate, achieving the same function as the lamination frame in the prior art, preventing overpressure on the edge of the laminate, eliminating the need for the lamination frame, and greatly reducing the material cost in the lamination process.

[0004] To solve the above-mentioned technical problems, the present invention provides the following technical solution:

[0005] In a first aspect, the present invention provides a photovoltaic module, including a laminate and a frame surrounding the edge of the laminate. The laminate is manufactured by laminating a stacked component and welded components disposed in part or all of the edge regions of the stacked component using a laminator. The stacked component includes a cover plate, a front encapsulant film, a cell array, a rear encapsulant film, and a back sheet, stacked sequentially from top to bottom. The welded component includes a first welded portion connected at least to the edge of the cover plate and a second welded portion connected at least to the edge of the back sheet. The first welded portion extends from the front edge of the cover plate to the side of the stacked component, including a first portion corresponding to the side edge of the stacked component and a second portion corresponding to the front edge of the cover plate. The second welded portion extends from the back edge of the back sheet to the side of the stacked component, including a fourth portion corresponding to the back edge of the back sheet and a third portion corresponding to the side edge of the stacked component. The frame is fixedly connected to the first welded portion and the second welded portion.

[0006] Optionally, the lower edge of the first portion of the first welded part is in direct contact with or spaced apart from the upper edge of the third portion of the second welded part; and the outer side of the first portion of the first welded part is flush with the outer side of the third portion of the second welded part.

[0007] Optionally, the first portion of the first welded portion and the third portion of the second welded portion are stacked together.

[0008] Optionally, the second part is provided with at least one water flow channel extending from the inside to the outside.

[0009] Optionally, the first part of the first welding portion is provided with at least one first fitting; the outer side of the third part of the second welding portion is provided with a second fitting that matches the first fitting; the first fitting and the second fitting engage.

[0010] Optionally, the material of the first welded part is stainless steel or aluminum alloy coated with an anti-corrosion layer.

[0011] Optionally, the material of the second welded part is stainless steel or aluminum alloy with an anti-corrosion coating.

[0012] Optionally, the thickness of the first part and / or the second part and / or the third part and / or the fourth part is 0.1 mm to 3 mm.

[0013] Optionally, the frame has a groove for accommodating the edge of the laminate, and the inner surface of the groove is fixedly connected to the first weld and the second weld.

[0014] The groove has an a-side corresponding to the cover plate of the laminate, a d-side corresponding to the back plate, and a b-side corresponding to the side surface of the laminate.

[0015] Wherein, surface a is connected to the second part of the first welded part, and the width of the contact area with the second part is smaller than the width of the second part;

[0016] The d-face is connected to the fourth part of the second welded part, and the width of the contact area with the fourth part is smaller than the width of the fourth part.

[0017] Secondly, the present invention provides a method for preparing a photovoltaic module, comprising:

[0018] Step 1: Connect the first welded part of the welded component to one side of the front of the cover plate, and connect the second welded part of the welded component to one side of the back of the back plate.

[0019] Step 2: Place the cover plate connected to the first welding part, the front adhesive film, the battery array, the rear adhesive film and the back plate connected to the second welding part in sequence from top to bottom to obtain the laminated part;

[0020] Step 3: Seal the edges of the laminated parts using edge sealing tape;

[0021] Step 4: Laminate the edge-sealed laminated parts, and remove the edge-sealing tape after lamination to obtain the laminated parts;

[0022] Step 5: Install a frame around the edge of the laminate and fix the frame to the welded part.

[0023] The first aspect of the invention described above has the following advantages or beneficial effects: During the lamination process, by providing welded parts in part or all of the edge areas of the laminated component, and by providing a first welded part connected to the cover plate and a second welded part connected to the back plate in the welded parts, the edges of the laminated component can be protected by the first and second welded parts, achieving the same function as the lamination frame in the prior art, preventing over-pressure on the edges of the laminated component. At the same time, the use of a lamination frame is eliminated, greatly reducing the material cost during the lamination process. Attached Figure Description

[0024] The accompanying drawings are provided to better understand the invention and are not intended to unduly limit the scope of the invention. Wherein:

[0025] Figure 1 This is a cross-sectional structural diagram of a photovoltaic module according to an embodiment of the present invention;

[0026] Figure 2 This is a schematic diagram of a structure in which the lower edge of the first part of the first welding part and the upper edge of the third part of the second welding part are in direct contact according to an embodiment of the present invention.

[0027] Figure 3 This is a schematic diagram of a structure in which the lower edge of the first part of the first welding part and the upper edge of the third part of the second welding part are spaced apart from each other according to an embodiment of the present invention.

[0028] Figure 4 This is a schematic diagram of a structure in which a first portion of a first welding part and a third portion of a second welding part are stacked according to an embodiment of the present invention.

[0029] Figure 5 This is a schematic diagram of the overall structure of the welded parts and the laminated parts according to an embodiment of the present invention;

[0030] Figure 6 According to an embodiment of the present invention Figure 5 Enlarged view of a portion of the structure of the central water flow channel area;

[0031] Figure 7 This is a schematic diagram showing the positional relationship between the first welded part and the second welded part according to another embodiment of the present invention;

[0032] Figure 8 This is a structural schematic diagram of the first assembly and the second assembly according to an embodiment of the present invention;

[0033] Figure 9 This is a cross-sectional structural diagram of another photovoltaic module according to an embodiment of the present invention;

[0034] Figure 10 This is a schematic diagram of the main process of a photovoltaic module manufacturing method according to an embodiment of the present invention;

[0035] Figure 11 This is a schematic diagram of the main process of step S1005 according to an embodiment of the present invention;

[0036] Figure 12 This is a three-dimensional structural diagram of a photovoltaic module according to an embodiment of the present invention;

[0037] Figure 13 This is a cross-sectional structural diagram of another photovoltaic module according to an embodiment of the present invention;

[0038] Figure 14 This is a cross-sectional structural diagram of a photovoltaic module filled with welding paste according to an embodiment of the present invention.

[0039] The attached figures are labeled as follows:

[0040] 1-Laminated component; 11-Cover plate; 12-Back plate;

[0041] 2-Welded component; 21-First welding section; 211-First assembly; 22-Second welding section; 221-Second assembly;

[0042] 3-Frame; 4-Edge sealing tape; 100-Water flow channel. Detailed Implementation

[0043] To facilitate and clearly describe the photovoltaic module and its fabrication method of the present invention, exemplary embodiments of the invention are described below in conjunction with the accompanying drawings. These embodiments include various details to aid understanding and should be considered merely exemplary. Therefore, those skilled in the art will recognize that various changes and modifications can be made to the embodiments described herein without departing from the scope and spirit of the invention. Similarly, for clarity and brevity, descriptions of well-known functions and structures are omitted in the following description.

[0044] Figure 1 and Figure 12 A schematic diagram of a photovoltaic module structure provided in an embodiment of the present invention is shown, wherein, Figure 12 A three-dimensional structural diagram of a photovoltaic module provided in an embodiment of the present invention is shown. Figure 1 It shows Figure 12 Cross-sectional structural diagram obtained by cutting along HH, as shown Figure 1 and Figure 12 As shown, the photovoltaic module provided by the present invention includes a laminate 1 and a frame 3 that surrounds the edge of the laminate 1. The laminate 1 is made by laminating a stacked component and a welded component 2 disposed in part or all of the edge area of ​​the stacked component using a laminator. The stacked component includes a cover plate 11, a front encapsulant film, a cell array, a rear encapsulant film, and a back sheet 12 stacked sequentially from top to bottom. The back sheet 12 can be a back sheet glass or a regular back sheet. The welded component 2 includes a first welded portion 21 connected to at least the cover plate 11 and a second welded portion 22 connected to at least the back sheet 12. The first welded portion 21 extends from the front edge of the cover plate 11 to the side of the stacked component, including a first portion corresponding to the side of the stacked component and a second portion corresponding to the front edge of the cover plate 11. The second welded portion 22 extends from the back edge of the back sheet 12 to the side of the stacked component, including a fourth portion corresponding to the back edge of the back sheet 12 and a third portion corresponding to the side of the stacked component. The frame 3 is fixedly connected to the first welded portion 21 and the second welded portion 22.

[0045] from Figure 1 and Figure 12 As can be seen, the first welding part 21 and the second welding part 22 are connected to the cover plate 11 and the back plate 12 respectively, and extend from the front of the cover plate 11 and the back of the back plate 12 to the side of the laminate, respectively. They can provide effective support and protection for the laminate during the lamination process, which can eliminate the use of the lamination frame in the prior art and reduce the material cost in the lamination process.

[0046] Furthermore, in the prior art, after lamination using a laminating frame, the laminating frame needs to be removed. In this embodiment of the invention, a welded component is used instead of the laminating frame, so no additional removal is required after lamination, which simplifies the production process and improves production efficiency.

[0047] Since the frame 3 is typically made of metal, to facilitate the fixing of the first welding part 21, the second welding part 22, and the frame 3, in an optional embodiment, the material of the first welding part 21 is stainless steel or aluminum alloy with an anti-corrosion coating, and the material of the second welding part 22 is also stainless steel or aluminum alloy with an anti-corrosion coating. The anti-corrosion coating can be a zinc-containing anti-corrosion coating. By setting both the first welding part 21 and the second welding part 22 to stainless steel or aluminum alloy, the welding of the first welding part 21 and the second welding part 22 to the frame 3 can be achieved directly through welding. Welding avoids the use of adhesives in existing technologies. For example, in existing technologies, after lamination, the laminated parts are usually installed with the frame 3 using adhesive, which is usually silicone. This has the following problems: (1) The adhesive itself has poor physical and chemical properties, and it releases toxic substances during curing, which is detrimental to environmental protection and production safety. It also has poor aging resistance and a long curing time; (2) Adhesive overflow occurs during frame installation, requiring additional cleaning processes to remove it; (3) Due to the uneven thickness of the laminated parts, the adhesive cannot form a uniform bond between the laminated parts and the frame, and the bonding effect cannot be guaranteed. In this embodiment of the invention, welding directly connects the welded parts to the frame, which avoids the use of adhesives and avoids the above problems.

[0048] In an optional embodiment, the frame 3 has a groove for accommodating the edge of the laminate 1 (described in detail below). The groove corresponds to the connection between the a-side of the cover plate 11 of the laminate 1 and the second part of the first welding portion 21, and the width of the contact area with the second part is smaller than the width of the second part. The groove also corresponds to the connection between the d-side of the back plate 12 of the laminate 1 and the fourth part of the second welding portion 22, and the width of the contact area with the fourth part is smaller than the width of the fourth part. This is because photovoltaic modules are usually installed at an angle to allow rainwater and dust to slide off with the angle of inclination, thereby ensuring the solar irradiation area on one side of the cover plate 11 in the photovoltaic module. This arrangement avoids the accumulation of rainwater and dust in the recess between the frame 3 and the cover plate 11, reducing the impact on the overall performance of the photovoltaic module. Therefore, in the embodiments of the present invention, as Figure 1 As shown, the area of ​​the first welding part 21 on the front of the cover plate 11 and the area of ​​the second welding part 22 on the back of the back plate 12 are both protruding from the frame 3, which can effectively prevent rainwater and dust from affecting the photovoltaic module.

[0049] Furthermore, such as Figure 13 As shown, a support surface is also provided at the bottom of the frame 3. In order to provide effective support for the laminate 1, in an optional embodiment, the width of the support surface at the bottom of the frame 3 projected onto the back of the laminate 1 is greater than the width of the back of the second welded part 22 covering the back of the back plate 12.

[0050] Below, with Figure 2 and Figure 3 Taking this example, the specific placement of the first welding portion 21 and the second welding portion 22 in the photovoltaic module provided in this embodiment of the invention will be specifically described. In an optional embodiment, the lower edge of the first portion of the first welding portion 21 and the upper edge of the third portion of the second welding portion 22 are in direct contact with each other or spaced apart. Specifically, Figure 2 This is a schematic diagram showing the structure in which the lower edge of the first portion of the first welding part 21 and the upper edge of the third portion of the second welding part 22 are in direct contact in an embodiment of the present invention. Figure 3 This is a schematic diagram showing the structure of the lower edge of the first portion of the first welding part 21 and the upper edge of the third portion of the second welding part 22 being spaced apart from each other, according to an embodiment of the present invention. Figure 2 and Figure 3 It can be seen that, regardless of whether the lower edge of the first part of the first welded part 21 and the upper edge of the third part of the second welded part 22 are in contact with each other or separated from each other, they can play a supporting role in the lamination process of the laminator.

[0051] In a further optional embodiment, the height of the first portion of the first welded portion 21 is not higher than the total height of the laminate, that is, the lower edge of the first portion cannot exceed the back plate 12; the height of the third portion of the second welded portion 22 is not higher than the total height of the laminate, that is, the upper edge of the third portion cannot exceed the cover plate 11, so as to avoid affecting the lamination of the laminate.

[0052] In further optional embodiments, such as Figure 2 and Figure 3 As shown, the outer side of the first portion of the first welded part 21 is flush with the outer side of the third portion of the second welded part 22. Since the first portion of the first welded part 21 and the third portion of the second welded part 22 are actually located on the same side of the frame 3, setting the first portion of the first welded part 21 and the third portion of the second welded part 22 to have the same thickness (i.e., flush with the outer side) can simultaneously ensure that the first portion of the first welded part 21 and the third portion of the second welded part 22 abut against the same side of the frame 3, without creating any empty space between the frame 3 and the side of the laminate, thus improving the space utilization efficiency.

[0053] Specifically, the thickness of the first part and the second part of the first welded part 21 can be set to be the same, that is, the thickness of the first part is 0.1mm~3mm, for example, 0.1mm, 0.15mm, 0.2mm, 0.25mm and 0.3mm, etc.; the thickness of the second part is 0.1mm~3mm, for example, 0.1mm, 0.15mm, 0.2mm, 0.25mm and 0.3mm, etc. Specifically, as... Figure 2 and Figure 3As shown, the thickness of the first part refers to the distance between the upper surface of the first part and the front surface of the cover plate 11, while the thickness of the second part refers to the distance between the outer surface (i.e., the left surface) of the second part and the side surface of the cover plate 11. Similarly, the thickness of the third and fourth parts in the second welding part 22 can also be set to be the same, that is, the thickness of the third part is 0.1mm~3mm, such as 0.1mm, 0.15mm, 0.2mm, 0.25mm and 0.3mm, etc.; the thickness of the fourth part is 0.1mm~3mm, such as 0.1mm, 0.15mm, 0.2mm, 0.25mm and 0.3mm, etc.

[0054] In yet another alternative embodiment, such as Figure 4 As shown, the first portion of the first welded portion 21 and the third portion of the second welded portion 22 are stacked. Compared to Figure 2 and Figure 3 The structure shown, Figure 4 The stacking arrangement shown can achieve better sealing of the sides of the stacked components. When water vapor enters the stacked components, it needs to pass through the stacked path between the first welded part 21 and the second welded part 22, that is, the water vapor has a longer intrusion path, which can further increase the service life of the photovoltaic module.

[0055] It is understandable that, for the structure where the first part of the first welded part 21 and the third part of the second welded part 22 are stacked, there are two different stacking methods: one is that the first part of the first welded part 21 is stacked outside the third part of the second welded part 22, and the other is that the third part of the second welded part 22 is stacked outside the first part of the first welded part 21. Comparatively, since the cover plate 11 is usually installed facing the side exposed to sunlight (i.e., the front of the cover plate 11 is usually facing upwards), it accumulates more dust and rainwater. Therefore, in this embodiment of the invention, it is preferable to... Figure 4 As shown, by stacking the first part of the first welded part 21 on the outside of the third part of the second welded part 22, the path of moisture intrusion can be further extended.

[0056] In one alternative embodiment, such as Figure 5 and Figure 6 As shown, at least one water flow channel 100 extending from the inside to the outside is provided on the second part of the first welded portion 21. Wherein, Figure 5 This is a schematic diagram of the overall structure of welded component 2 and the laminated component. Figure 6 for Figure 5 Enlarged view of a portion of the structure of region 100 in the central water flow channel. Figure 5 and Figure 6As can be seen, by providing a water-flow channel 100 on the second part of the first welding portion 21, this embodiment of the invention can draw out rainwater and dust along with the tilt angle of the photovoltaic module, preventing them from accumulating on the photovoltaic module. The location of the water-flow channel 100 can be as follows: Figure 5 and Figure 6 As shown, the first welding portion 21 in the width direction of the photovoltaic module is provided only, or it can be provided on all the first welding portions 21 in the width and length directions of the photovoltaic module. The present invention does not make a specific limitation on this, and the specific setting can be made according to actual needs.

[0057] It should be noted that the aforementioned Figures 1 to 6 The examples shown all depict the case where the first weld portion 21 and the second weld portion 22 are completely correspondingly arranged. In another optional embodiment, such as... Figure 7 As shown, the positions of the first welding part 21 and the second welding part 22 may not correspond completely; that is, the first welding part 21 may only be provided in a portion of the edge area of ​​the laminate, while the second welding part 22 may be provided in the entire edge area of ​​the laminate. It should be noted that... Figure 7 The top view only shows the location of the first welded part 21 on one side of the cover plate 11, and cannot directly show the second welded part 22 on the side of the back plate 12. However, the area where the first welded part 21 is not located actually contains a portion of the second welded part 22 extending from the back of the back plate 12 to the side of the laminate. Therefore, the area where the first welded part 21 is not located is marked with the second welded part 22. It can be understood that, under this arrangement, only a portion of the cover plate 11 has the first welded part 21, so the area where the first welded part 21 is not located is actually the same as the aforementioned... Figure 5 and Figure 6 The water flow channel 100 provided on the first welding part 21 has the same function, which can facilitate the flow of rainwater and dust. In addition, the provision of the first welding part 21 in some areas can reduce the weight of the component and facilitate transportation and installation.

[0058] Additionally, the first welded portion 21 and the second welded portion 22 can be initially fixed before lamination. Specifically, in one optional embodiment, the first portion of the first welded portion 21 is provided with at least one first fitting 211; the outer side of the third portion of the second welded portion 22 is provided with a second fitting 221 that matches the first fitting 211; the first fitting 211 and the second fitting 221 engage. For example, as... Figure 8 As shown, the first assembly 211 can be a sheet-like structure protruding from the first welding part 21, and the second assembly 221 can be a through hole that matches the sheet-like structure. The first assembly 211 and the second assembly 221 are engaged by inserting the sheet-like structure into the through hole.

[0059] In another alternative embodiment, the welded component 2 may not have the first assembly 211 and the second assembly 221. A hot melt adhesive film is provided between the welded component 2 and the laminate, allowing the welded component 2 to bond with the laminate during the lamination process. In this case, the first welded portion 21 and the second welded portion 22 are actually fixed to the laminate as one unit, ensuring a stable connection between the first welded portion 21, the second welded portion 22 and the laminate even without the first assembly 211 and the second assembly 221.

[0060] In another alternative embodiment, the weldment 2 may be provided with a first assembly 211 and a second assembly 221, and a hot melt adhesive film is provided between the weldment 2 and the laminate to increase the connection strength between the weldment 2 and the laminate.

[0061] In one alternative embodiment, such as Figure 1 and Figure 9 As shown, the frame 3 has a groove for accommodating the laminate 1. The groove has an a-side corresponding to the cover plate 11 of the laminate 1, a d-side corresponding to the back plate 12, a b-side corresponding to the side of the laminate 1, and a c-side for support.

[0062] The inner surface of the groove is fixedly connected to the first welding part 21 and the second welding part 22. Wherein, Figure 1 and Figure 9 This is a schematic diagram showing different connection positions between the groove and the first welded portion 21 and the second welded portion 22. In one optional embodiment, as shown... Figure 1 As shown, surface a of frame 3 is fixedly connected to the second part of the first welding portion 21, as shown in region B, and surface d of frame 3 is fixedly connected to the fourth part of the second welding portion 22, as shown in region A. In another optional embodiment, as shown... Figure 9 As shown, the frame 3 is not only fixedly connected to the second part of the first welding part 21, but can also be further fixedly connected to the first part of the first welding part 21, that is, as... Figure 9 As shown in region C, the b-side of the frame 3 is fixedly connected to the second part of the first welded part 22. For the second welded part 22, since the third part of the second welded part 22 is located inside the first part of the first welded part 21, the second welded part 22 only needs to have its fourth part fixedly connected to the frame 3, i.e., to... Figure 1 The same as region A in, Figure 9 Alternatively, area A can be used to fix the second welding part 22 to the frame 3. Additionally, as... Figure 1 The border 3 shown can have a closed cavity to enhance support, or as... Figure 9 The frame 3 shown can have an open cavity, which allows the welding area A to be exposed, making it easier to operate.

[0063] Since the welding position is actually located on the contact surface between the inner side of the frame 3 and the first welding part 21 and the second welding part 22, if welding is only achieved by heating a portion of the frame 3, the welding effect may not be effectively guaranteed. Therefore, in a further optional embodiment of the present invention, such as... Figure 13 As shown, grooves are cut into the areas of frame 3 where welding is required to obtain... Figure 13 The diagram shows a cross-sectional structure of a photovoltaic module with slots cut at specific locations. Specifically, Figure 13 The grooving direction shown is only an illustration. Grooves can also be made in other directions, as long as welding can be performed at the required location after grooving. This invention does not impose any specific limitations on this.

[0064] Furthermore, regarding the cross-sectional shape of the slot, in one optional embodiment, the cross-sectional shape of the slot can be circular, triangular, quadrilateral, or other polygonal shapes, etc. For example... Figure 13 As shown, by slotting the frame 3 at the positions corresponding to regions A and B, the positions on the inner side of the frame 3 adjacent to the first welding part 21 and the second welding part 22 can be directly welded.

[0065] Understandably, during the welding process, the welding slurry continuously fills the grooves. To further protect the welded area, in one optional embodiment, such as... Figure 14 As shown, the groove is filled with welding slurry, and the welding area filled with welding slurry is surface treated, such as by applying an anti-corrosion coating (anti-rust paint layer, metal coating, thermal spray coating, zinc coating, aluminum coating, zinc-magnesium-aluminum alloy coating, etc.). In this way, the grooved area will not be visible on the surface, which improves the reliability and overall aesthetics of the photovoltaic module.

[0066] Furthermore, the cross-sectional shape of the first welded part 21 and the second welded part 22 can be L-shaped. Specifically, the first part of the first welded part 21 is located on the short side of the L-shaped structure, and the second part is located on the long side of the L-shaped structure. Similarly, the third part of the second welded part 22 is located on the short side of the L-shaped structure, and the fourth part is located on the long side of the L-shaped structure.

[0067] In one optional embodiment, the thickness of the groove in the frame 3 is 0.4mm to 2mm, such as 0.4mm, 0.8mm, 1.2mm, 1.5mm, 2mm, etc.; the width of the groove in the frame 3 is 3mm to 10mm, such as 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 9mm, etc. Here, the thickness of the groove refers to the distance from the main surface of the groove to the bottom of the groove, and the width of the groove refers to the distance between the two sidewalls of the groove.

[0068] In summary, the photovoltaic module provided by the embodiments of the present invention, by providing welded parts in part or all of the edge areas of the laminate, including a first welded part connected to the cover plate and a second welded part connected to the back sheet, can protect the edges of the laminate using the first and second welded parts, achieving the same function as the lamination frame in the prior art, preventing over-pressure on the edges of the laminate. At the same time, it eliminates the need for a lamination frame, greatly reducing material costs in the lamination process.

[0069] In one embodiment of the present invention, such as Figure 10 As shown, this embodiment provides a method for manufacturing a photovoltaic module, which may include the following steps:

[0070] Step S1001: Connect the first welding part 21 of the welding part 2 to the front side of the cover plate 11, and connect the second welding part 22 of the welding part 2 to the back side of the back plate 12; Specifically, the first welding part 21 can be bonded to the front side of the cover plate 11 by pressure-sensitive adhesive, hot melt adhesive, etc., and the second welding part 22 can be bonded to the back side of the back plate 12 by pressure-sensitive adhesive, hot melt adhesive, etc.

[0071] In step S1002, the cover plate 11 connected to the first welding part 21, the front adhesive film, the battery array, the rear adhesive film, and the back plate 12 connected to the second welding part 22 are placed sequentially from top to bottom to obtain the laminated part.

[0072] Step S1003: Use edge sealing tape 4 to seal the edges of the laminated parts;

[0073] Step S1004: Laminate the edge-sealed laminated parts, and remove the edge-sealing tape 4 after lamination to obtain laminated part 1;

[0074] Step S1005: Install the frame 3 on the edge of the laminate 1 and fix the frame 3 to the welded part 2 together. Specifically, the frame 3 and the welded part 2 are fixedly connected together by welding.

[0075] In this process, adhesive material can be applied to the first welding part 21 and the second welding part 22, and then the first welding part 21 and the second welding part 22 can be pressed onto the front side of the cover plate 11 and the back side of the back plate 12, respectively, to obtain the cover plate 11 with the first welding part 21 and the back plate 12 with the second welding part 22.

[0076] Specifically, the placement of the edge sealing tape 4 is as follows: Figures 2 to 4 As shown, since the edge sealing tape 4 is only used for edge sealing and bonding before lamination and is removed after lamination, it does not exist. Figure 1 and Figure 9 The photovoltaic module shown is an example of this invention. It can be seen that the photovoltaic module of this embodiment can be obtained through the above steps S1003 to S1005.

[0077] In an optional embodiment, the process of installing the frame 3 in step S1005 is specifically as follows: Figure 11 Shown, including:

[0078] Step S1101: Place the laminated part with welded part 2 into the groove of the frame 3;

[0079] Step S1102: Spot weld the groove area of ​​the frame 3 so that the frame 3 and the welded part 2 are fixed together.

[0080] Step 1102 may further include: spot welding a portion of the frame 3 corresponding to the first part of the first welding portion 21 and / or the second part of the first welding portion 21 and / or the third part of the second welding portion 22 and / or the fourth part of the second welding portion 22; wherein the first part is the portion of the first welding portion 21 corresponding to the side of the laminate, the second part is the portion of the first welding portion 21 corresponding to the front of the cover plate 11, the third part is the portion of the second welding portion 22 corresponding to the side of the laminate, and the fourth part is the portion of the second welding portion 22 corresponding to the back of the back plate 12. Welding can be performed using spot welding, such as... Figure 12 As shown, two rows of solder points are set along the edge of frame 3.

[0081] In summary, the photovoltaic module manufacturing method provided by this invention first fixes the first welding part 21 to the front of the cover plate 11, and simultaneously fixes the second welding part 22 to the back of the back plate 12. A laminated component with the first welding part 21 and the second welding part 22 can be obtained through a single lamination process. Then, by fixing the first welding part 21 and the second welding part 22 to the frame 3, a complete photovoltaic module can be obtained. This not only eliminates the need for a easily damaged lamination frame during the lamination process, but also avoids various problems associated with fixing the frame 3 to the laminated component using adhesive in the prior art.

[0082] The above steps are provided only to help understand the structure, method, and core ideas of this invention. Those skilled in the art can make various improvements and modifications to this invention without departing from its principles, and these improvements and modifications also fall within the scope of protection of the claims.

Claims

1. A photovoltaic module, comprising a laminate (1) and a frame (3) surrounding the edge of the laminate (1), characterized in that, The laminate (1) is made by laminating the laminate and the welded part (2) disposed in part or all of the edge area of ​​the laminate by a laminator; The laminated components include a cover plate (11), a front adhesive film, a battery array, a rear adhesive film, and a back plate (12) stacked sequentially from top to bottom. The welded part (2) includes a first welded part (21) that is connected to at least the edge of the cover plate (11) and a second welded part (22) that is connected to at least the edge of the back plate (12). The first welded portion (21) extends from the front edge of the cover plate (11) to the side of the laminate, including a first portion corresponding to the side of the laminate and a second portion corresponding to the front edge of the cover plate (11); The second weld (22) extends from the back edge of the back plate (12) to the side of the laminate, including a fourth portion corresponding to the back edge of the back plate (12) and a third portion corresponding to the side of the laminate; The frame (3) is fixedly connected to the first welding part (21) and the second welding part (22).

2. The photovoltaic module according to claim 1, characterized in that, The lower edge of the first portion of the first welded part (21) is in direct contact with or spaced apart from the upper edge of the third portion of the second welded part (22); Furthermore, the outer side of the first portion of the first welded part (21) is flush with the outer side of the third portion of the second welded part (22).

3. The photovoltaic module according to claim 1, characterized in that, The first part of the first welding part (21) and the third part of the second welding part (22) are stacked together.

4. The photovoltaic module according to any one of claims 1 to 3, characterized in that, The second part is provided with at least one water flow channel (100) that extends from the inside to the outside.

5. The photovoltaic module according to claim 2 or 3, characterized in that, The first part of the first welding part (21) is provided with at least one first fitting (211); The outer side of the third part of the second welding part (22) is provided with a second fitting (221) that matches the first fitting (211). The first assembly (211) engages with the second assembly (221).

6. The photovoltaic module according to claim 1, characterized in that, The material of the first welded part (21) is stainless steel or aluminum alloy with an anti-corrosion coating; And / or, The material of the second welded part (22) is stainless steel or aluminum alloy with an anti-corrosion coating; And / or, The thickness of the first part and / or the second part and / or the third part and / or the fourth part is 0.1mm to 3mm.

7. The photovoltaic module according to claim 1, characterized in that, The frame (3) has a groove for accommodating the edge of the laminate (1), and the inner surface of the groove is fixedly connected to the first weld (21) and the second weld (22).

8. The photovoltaic module according to claim 7, characterized in that, The groove has an a-side corresponding to the cover plate (11) of the laminate (1), a d-side corresponding to the back plate (12), and a b-side corresponding to the side surface of the laminate (1). Wherein, the a-face is connected to the second part of the first welded part (21) and the width of the contact area with the second part is smaller than the width of the second part; The d-face is connected to the fourth part of the second welded part (22), and the width of the contact area with the fourth part is smaller than the width of the fourth part.

9. A method for manufacturing a photovoltaic module, characterized in that, include: Step 1: Connect the first welded part (21) in the welded part (2) to the front side of the cover plate (11), and connect the second welded part (22) in the welded part (2) to the back side of the back plate (12); Step 2: Place the cover plate (11) connected to the first welding part (21), the front adhesive film, the battery array, the rear adhesive film and the back plate (12) connected to the second welding part (22) in sequence from top to bottom to obtain the laminated part; Step 3: Seal the edges of the laminated parts using edge sealing tape (4); Step 4: Laminate the edge-sealed laminate and remove the edge-sealing tape (4) after lamination to obtain the laminate (1). Step 5: Install a frame (3) on the edge of the laminate (1) and fix the frame (3) to the welded part (2).

10. The preparation method according to claim 9, characterized in that, The frame (3) is fixedly connected to the welded part (2), including: spot welding the part of the frame (3) corresponding to the first part of the first welded part (21) and / or the part corresponding to the second part of the first welded part (21) and / or the part corresponding to the third part of the second welded part (22) and / or the part corresponding to the fourth part of the second welded part (22).

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