Photovoltaic lamination piece, photovoltaic module and lamination tool

Abstract

The utility model provides a photovoltaic lamination member, a photovoltaic assembly and a lamination tool, and relates to the field of photovoltaic technology. The technical problem that an existing photovoltaic module is high in manufacturing cost on the basis that the reliability is met is solved. The photovoltaic laminated piece comprises a body and an adhesive film layer attached to the peripheral side face of the body, and the thickness of the adhesive film layer is smaller than or equal to the preset thickness; the adhesive film layer and the packaging adhesive film in the body are of an integrally formed structure; the adhesive film layer is provided with a plurality of discontinuous structures in the circumferential direction of the body, and exposed parts are arranged at the positions of the discontinuous structures on the circumferential side face of the body. According to the photovoltaic laminated piece, the adhesive film layer is formed on the body, so that the amount of sealant pre-coated in the mounting groove can be reduced when the photovoltaic laminated piece is mounted on a frame, and the cost of the photovoltaic module is reduced while the reliability of the photovoltaic module is ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to photovoltaic technology field especially relates to a photovoltaic laminated component, photovoltaic module, laminating tool. BACKGROUND

[0002] The statements in this section merely provide background information related to the utility model and do not necessarily constitute the prior art.

[0003] The photovoltaic module is generally assembled by the photovoltaic laminated component, the frame and the junction box, wherein the photovoltaic laminated component is laminated by cover glass, encapsulation adhesive film, cell piece, another encapsulation adhesive film and back plate from the light receiving surface to the back light surface. In addition to enhancing the mechanical load resistance of the photovoltaic module, the frame can also seal the four edges of the photovoltaic laminated component to prevent water vapor from penetrating and affecting the performance and reliability of the photovoltaic module.

[0004] In order to realize the connection of the photovoltaic laminated component and the frame and the sealing of the four edges of the laminated component, in the related technology, the sealing adhesive is first punched in the mounting groove of the frame, and then it is installed to the four edges of the laminated component. The part of the sealing adhesive in the mounting groove range of the front and back surfaces of the laminated component forms overflow glue under the extrusion to realize the installation of the frame, so as to ensure the reliability of the photovoltaic module. However, the existing photovoltaic module has high manufacturing cost on the basis of meeting the reliability. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a photovoltaic laminated component, photovoltaic module, laminating tool to solve the technical problem that the photovoltaic module has high manufacturing cost on the basis of meeting the reliability.

[0006] In order to realize the above-mentioned purpose, the utility model provides the following technical scheme:

[0007] Firstly, the utility model provides a photovoltaic laminated component, which comprises a body and an adhesive film layer attached to the peripheral side surface of the body, and the thickness of the adhesive film layer is less than or equal to a preset thickness.

[0008] The adhesive film layer and the encapsulation adhesive film in the body are integrally formed.

[0009] Along the circumference of the body, the adhesive film layer has a plurality of intermittent structures, and the peripheral side surface of the body has exposed parts at the positions of the plurality of intermittent structures.

[0010] According to at least one embodiment of the utility model, in the thickness direction of the body, the adhesive film layer has a structure of being thick in the middle and thin on both sides.

[0011] According to at least one embodiment of the utility model, in the thickness direction of the body, the adhesive film layer has a structure of gradually thinning from the middle to both sides.

[0012] According to at least one embodiment of the present application, the thickness of the adhesive film layer is in the range of 0.5mm to 1.5mm; and / or,

[0013] The width of the discontinuous structure is in the range of 1mm to 3mm along the circumference of the body.

[0014] According to at least one embodiment of the present application, the body is rectangular in shape, and has two opposite first sides and two opposite second sides;

[0015] The portion of the adhesive film layer on the first side has a plurality of discontinuous structures equidistantly distributed; and / or,

[0016] The portion of the adhesive film layer on the second side has a plurality of discontinuous structures equidistantly distributed.

[0017] According to at least one embodiment of the present application, the portion of the adhesive film layer on the first side has three discontinuous structures; and / or,

[0018] The portion of the adhesive film layer on the second side has two discontinuous structures.

[0019] In a second aspect, the present application provides a photovoltaic module, comprising a photovoltaic laminate, a sealing structure and a frame, wherein the photovoltaic laminate is the photovoltaic laminate of the first aspect;

[0020] The frame has a receiving groove for accommodating the circumferential edge of the photovoltaic laminate, and the sealing structure is arranged between the circumferential side of the photovoltaic laminate and the groove wall of the receiving groove; and / or,

[0021] The sealing structure is arranged between the circumferential edge of the photovoltaic laminate and the groove wall of the receiving groove.

[0022] In a third aspect, the present application provides a laminating tool for forming the photovoltaic laminate of the first aspect;

[0023] The laminating tool is a frame structure, and the frame structure has a clamping groove with a U-shaped cross section, and at least part of the two side walls of the clamping groove is respectively used for fitting the circumferential edge of the two surfaces of the body;

[0024] The bottom wall of the clamping groove is opposite to the circumferential side of the body, and the distance between the bottom wall of the clamping groove and the circumferential side of the body is equal to the predetermined thickness;

[0025] The bottom wall of the clamping groove of the frame structure is provided with a through hole corresponding to the discontinuous structure.

[0026] According to at least one embodiment of the present application, the through hole is located at the middle part of the bottom wall surface in a preset direction, and the preset direction is parallel to the thickness direction of the body.

[0027] According to at least one embodiment of the present application, the shape of the through hole comprises one of a polygon, a circle or an ellipse.

[0028] In one or more technical solutions provided in the exemplary embodiments of the present application, at least one of the following beneficial effects can be achieved.

[0029] The photovoltaic laminate in the exemplary embodiments of the present application comprises a body and a glue film layer provided on the circumferential surface of the body, the glue film layer is formed by overflow of the encapsulation glue film in the body after melting during lamination, and is a glue film of an integral molding structure on the circumferential surface. Further, the glue film layer is a discontinuous structure along the circumference of the body, but has a plurality of intermittent structures, that is, at the positions of the plurality of intermittent structures, the circumferential surface of the body does not have overflowed glue film, but is exposed. Therefore, when the photovoltaic laminate is installed into the mounting groove of the frame, the sealant pre-coated in the mounting groove is extruded, so that the photovoltaic laminate is sealingly installed and sealed with the frame.

[0030] Compared with the circumferential surface of the body of the photovoltaic laminate in the prior art, the glue film layer around the body of the photovoltaic laminate in the exemplary embodiments of the present application occupies a certain space in the mounting groove. Based on this, the amount of sealant pre-coated in the mounting groove can be reduced, so that the cost of the photovoltaic module can be reduced. BRIEF DESCRIPTION OF DRAWINGS

[0031] The accompanying drawings illustrate exemplary embodiments of the present application, and together with the description, serve to explain the principles of the present application, wherein the drawings include these drawings to provide further understanding of the present application, and the drawings are included in the present specification and form part of the specification;

[0032] Figure 1 is a structural schematic view of the body according to the embodiment of the present application;

[0033] Figure 2 is a structural schematic view of the lamination tool according to the embodiment of the present application;

[0034] Figure 3 is a structural schematic view of the body and the lamination tool according to the embodiment of the present application;

[0035] Figure 4 is a structural schematic view of the body after lamination according to the embodiment of the present application;

[0036] Figure 5is a structural schematic diagram of a photovoltaic laminate according to the embodiment of the present application;

[0037] Figure 6 is an exploded structural schematic diagram of a photovoltaic module according to the embodiment of the present application;

[0038] Figure 7 is a cross-sectional structural schematic diagram of a photovoltaic module according to the embodiment of the present application.

[0039] Fig. 10 is a structural schematic diagram of a body according to the embodiment of the present application. DETAILED DESCRIPTION

[0040] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clear and explicit, the present application will be further described in detail below in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and do not limit the present application.

[0041] In the related art, when the photovoltaic laminate is installed into the accommodating groove of the frame, the sealant needs to be pre-punched in the accommodating groove of the frame, and the sealant is extruded to form reliable sealing and connection between the photovoltaic laminate and the frame during the installation process. Under the premise of ensuring the reliability of the photovoltaic module, how to further reduce the amount of sealant used is an effective way to further reduce the manufacturing cost of the photovoltaic module.

[0042] In view of the above problems, the photovoltaic laminate provided in the exemplary embodiments of the present application forms a glue film layer by overflowing the melting of the encapsulating glue film around the body, and the glue film layer occupies part of the space of the accommodating groove when installed with the frame, so that the amount of sealant can be reduced, and the production cost can be reduced.

[0043] Figure 1 is a structural schematic diagram of a body according to the embodiment of the present application. As shown in Figure 1 The body 10 of the photovoltaic laminate in the exemplary embodiments of the present application is formed by laminating a cover plate glass, an encapsulating glue film, a cell sheet, another encapsulating glue film and a back plate, and has three openings on the back plate for leading out bus bars of the cell sheet to install a junction box 60 to lead out current.

[0044] In actual application, the above five layers of materials are laminated and placed in a laminator, and the two encapsulating glue films are melted under the action of heat and pressure, and firm adhesion is formed between the layers, thereby forming a finished photovoltaic laminate.

[0045] Exemplarily, the encapsulation adhesive film can be one of a polyethylene-vinyl acetate (EVA) adhesive film, a poly(ethylene-1-octene) (POE) adhesive film, an EVA / POE laminated film, an EVA / POE / EVA laminated film, or a POE / EVA / POE laminated film.

[0046] Exemplarily, the cover plate glass and the back plate can both be tempered glass or semi-tempered glass.

[0047] Figure 2 is a structural schematic view of a laminating tool according to an embodiment of the present application; Figure 3 is a structural schematic view of a body and a laminating tool according to an embodiment of the present application. As shown in Figure 2 and Figure 3 As shown in Figs. 1 and 2, the photovoltaic laminate of the exemplary embodiment of the present application needs to be surrounded by the laminating tool 40 at the edge portions of the body 10 in the actual forming process.

[0048] In actual application, the laminating tool 40 is a rectangular frame structure, the frame structure has a clamping groove 42 with a U-shaped cross section, at least part of the two side walls of the clamping groove 42 are respectively attached to the circumferential edge portions of the two surfaces of the body 10; the bottom wall of the clamping groove 42 is opposite to the peripheral side surface of the body 10, and the distance between the bottom wall of the clamping groove 42 and the peripheral side surface of the body 10 is equal to the preset thickness; the bottom wall of the clamping groove 42 of the frame structure is provided with a through hole 41 corresponding to the discontinuous structure 21.

[0049] Exemplarily, in the clamping groove 42 formed by the frame structure, the clamping groove 42 has a bottom wall opposite to each of the four side surfaces of the body 10, since the two opposite side walls of the clamping groove 42 are clamped at the circumferential edge portions of the front surface and the back surface of the body 10, the peripheral side surface of the body 10 is in a closed space, in order to make the encapsulation adhesive film inside the body 10 overflow after melting to form the adhesive film layer 20, a plurality of through holes 41 need to be provided on each bottom wall to keep ventilation during the laminating process to facilitate the formation of the adhesive film layer 20.

[0050] Specifically, the distance between the bottom wall of the clamping groove 42 and the peripheral side surface of the body 10 is determined according to the thickness of the adhesive film layer 20 to be formed. Exemplarily, the distance between the bottom wall of the clamping groove 42 and the peripheral side surface of the body 10 can be 0.5mm-1.5mm, optionally 0.8mm-1.2mm, for example, it can be 0.9mm, 1.0mm, 1.1mm, etc.

[0051] When the body 10 of the photovoltaic laminate is assembled to the laminating tool 40 and is sent into a laminating machine for laminating, the encapsulation film in the body 10 will overflow from the peripheral side of the body 10 under the pressure and heating in the laminating process and form the film layer 20 on the peripheral side of the body 10 under the blocking of the laminating tool 40. Due to the through holes 41 of the laminating tool 40, a part of the overflowing encapsulation film will form a protruding part on the film layer 20. As shown in Figure 4 Figure 4 is a structure schematic view of the laminated body according to the embodiment of the present application.

[0052] Since the edge of the overflowing film at the position of the protruding part is rough and the edge thickness is large, it is easy to cause the exploding phenomenon in the frame assembling process, and therefore, the overflowing film at the position needs to be removed to form the discontinuous structure 21 on the film layer 20, as shown in Figure 5 Figure 5 is a structure schematic view of the photovoltaic laminate according to the embodiment of the present application.

[0053] Considering that the edge thickness of the film layer 20 is also thick and will also cause the exploding phenomenon in the frame assembling process, the edge thickness of the film layer 20 is also effectively controlled.

[0054] In some embodiments, in the thickness direction of the body 10, the encapsulation film is located at the middle position of the body 10 and overflows in the direction from the middle to both sides, and the film layer 20 is formed as a structure with thick middle and thin both sides.

[0055] It should be noted that the thickness direction of the body 10 refers to the distribution direction from the cover glass to the back plate.

[0056] Exemplarily, in the thickness direction of the body 10, the film layer 20 is gradually thinned in the direction from the middle to both sides. Through the control of the laminating tool on the shape of the film layer 20, the thickness of the both sides of the film layer 20, i.e. the edge part, and the overall thickness can be controlled to a certain extent, so as not to be too thick to cause the exploding phenomenon in the subsequent frame assembling.

[0057] For example, in the direction away from the body 10, the overall thickness of the film layer 20 is controlled to be 0.5mm-1.5mm, optionally 0.8mm-1.2mm, for example, it can be 0.9mm, 1.0mm, 1.1mm, etc.

[0058] Considering that the laminating tool 40 is fully and uniformly vented to make the film layer 20 form a regular shape to reduce the risk of exploding in the subsequent frame assembling. A plurality of through holes 41 are formed on the four sides of the laminating tool 40, and therefore, a plurality of discontinuous structures 21 will also be formed on the four sides of the laminated body 10.

[0059] ​​Exemplarily, as Figure 5 shown, the body 10 is rectangular in shape, and has two opposite first sides and two opposite second sides; the portions of the body 10 where the first sides are located have a plurality of discontinuous structures 21 equidistantly distributed; the portions of the body 10 where the second sides are located also have a plurality of discontinuous structures 21 equidistantly distributed.

[0060] When a plurality of discontinuous structures 21 with the same spacing are formed on each side of the body 10, the portions of the body 10 where the first sides are located have three discontinuous structures 21, and the portions of the body 10 where the second sides are located have two discontinuous structures 21. Thus, the distance between each discontinuous structure 21 is substantially the same in the circumferential direction of the body 10, thereby ensuring uniform exhaust during lamination and forming a regular adhesive film layer 20.

[0061] Figure 6 is a schematic diagram of the exploded structure of the photovoltaic module according to the embodiment of the present application; Figure 7 is a schematic diagram of the cross-sectional structure of the photovoltaic module according to the embodiment of the present application. As Figure 6 and Figure 7 shown, the photovoltaic module according to the exemplary embodiment of the present application further comprises a photovoltaic laminate, a sealing structure 50, and a frame 30. The photovoltaic laminate is the photovoltaic laminate according to the above embodiment. The frame 30 has a receiving groove 31 for receiving the circumferential edge of the photovoltaic laminate, and the sealing structure 50 is arranged between the circumferential side of the photovoltaic laminate and the groove wall of the receiving groove 31. The sealing structure 50 is arranged between the circumferential edge of the photovoltaic laminate and the groove wall of the receiving groove 31.

[0062] In actual application, the frame 30 is formed by two long frame segments and two short frame segments, and the cross-sectional shape of the long frame segments and the short frame segments is the same. The frame 30 has the receiving groove 31, which is substantially in the form of a U-shaped structure and surrounds the circumferential edge of the photovoltaic laminate to protect the circumferential side of the photovoltaic laminate. In order to seal the circumferential side of the photovoltaic laminate, the sealing structure 50 is formed by using silicone.

[0063] A certain amount of silicone is injected into the receiving groove 31. When the photovoltaic laminate is installed into the receiving groove 31, the silicone in the receiving groove 31 is extruded to overflow into the discontinuous structures 21 of the adhesive film layer 20 and the portions of the body 10 located on the front and back surfaces of the receiving groove 31, thereby connecting the photovoltaic laminate and the frame 30 and achieving the sealing effect.

[0064] As Figure 6 shown, the photovoltaic module further comprises three junction boxes 60 arranged on the back surface of the body 10 to form effective electrical connection with the cell pieces in the photovoltaic laminate.

[0065] Compared with the prior art, the photovoltaic laminate in the photovoltaic module of the exemplary embodiment of the present invention has an additional adhesive film layer 20 on the periphery of its body 10, which can occupy part of the space of the receiving groove 31, thereby reducing the amount of silicone used and reducing production costs.

[0066] like Figure 2 As shown, an exemplary embodiment of the present invention also provides a lamination fixture 40, wherein a through hole 41 is located in the middle part of the bottom wall surface in a preset direction, and the preset direction is parallel to the thickness direction of the body 10.

[0067] Since the encapsulating film inside the body 10 is in the middle of the thickness direction, the overflowing film overflows from the middle to both sides, and the amount of overflowing film in the middle is relatively large. Therefore, setting the venting through hole 41 on the lamination fixture 40 in the middle of the bottom wall of the slot 42 is more conducive to smoother venting, so that the formed film layer 20 is more regular and the probability of the part bursting during subsequent frame assembly is reduced.

[0068] In some embodiments, the shape of the through hole 41 can be one of polygon, circle or ellipse, such as rectangle, rhombus, regular polygon, etc., and its size can be in the range of 1mm to 3mm. Within the above range, air can be vented without making the protrusion forming the adhesive film layer 20 too large and thus removing it and increasing the amount of sealant used.

[0069] It is understandable that in the photovoltaic laminate formed by the above-mentioned lamination tooling 40, the width of the discontinuous structure 21 of the adhesive film layer 20 is also in the range of 1mm to 3mm, for example, it can be 1.5mm, 2mm, 2.5mm, etc.

[0070] Therefore, by using the above-mentioned lamination fixture 40, the photovoltaic laminate body 10 only needs to be sealed during lamination, and then the desired photovoltaic laminate can be obtained after lamination by an existing laminator. The manufacturing method is simple and feasible, and is suitable for large-scale promotion and use.

[0071] The other technical advantages of the above-mentioned lamination tooling compared to the prior art are the same as those of the photovoltaic laminates mentioned above, and will not be repeated here.

[0072] Those skilled in the art should understand that the above embodiments are merely for clearly illustrating the present invention and are not intended to limit the scope of the present invention. Those skilled in the art can make other changes or modifications based on the above disclosure, and these changes or modifications still fall within the scope of the present invention.

Claims

1. A photovoltaic laminate characterized in that, The body and the adhesive film layer are integrally formed. The adhesive film layer and the encapsulation adhesive film in the body are integrally formed. The adhesive film layer has a plurality of discontinuous structures along the circumference of the body.

2. The photovoltaic laminate of claim 1, wherein, The adhesive film layer has a structure of being thick in the middle and thin on both sides in the thickness direction of the body.

3. The photovoltaic laminate of claim 2, wherein, The adhesive film layer has a structure of gradually thinning from the middle to both sides in the thickness direction of the body.

4. The photovoltaic laminate according to any of claims 1 to 3, characterized in that The thickness of the adhesive film layer ranges from 0.5 mm to 1.5 mm; and / or The width of the discontinuous structure ranges from 1 mm to 3 mm along the circumference of the body.

5. The photovoltaic laminate of claim 4, wherein, The body has a rectangular shape and has two opposite first sides and two opposite second sides. The plurality of discontinuous structures on the portion of the first side are equidistantly distributed; and / or The plurality of discontinuous structures on the portion of the second side are equidistantly distributed.

6. The photovoltaic laminate of claim 5, wherein, The portion of the first side has three discontinuous structures; and / or The portion of the second side has two discontinuous structures.

7. A photovoltaic module, characterized by The photovoltaic laminate is the photovoltaic laminate of any one of claims 1-6. The sealing structure is arranged between the circumferential edge of the photovoltaic laminate and the groove wall of the accommodating groove; and / or The sealing structure is arranged between the circumferential edge of the photovoltaic laminate and the groove wall of the accommodating groove.

8. A lamination tool characterized by, The laminating tool is a frame structure having a clamping groove with a U-shaped cross section, at least a portion of the two side walls of the clamping groove is used to fit the circumferential edge of the two surfaces of the body. The bottom wall of the clamping groove is opposite to the circumferential surface of the body, and the distance between the bottom wall of the clamping groove and the circumferential surface of the body is equal to the preset thickness. The bottom wall of the clamping groove of the frame structure is provided with a through hole corresponding to the discontinuous structure. The through hole is located at the middle portion of the bottom wall in the preset direction, and the preset direction is parallel to the thickness direction of the body.

9. The lamination tool of claim 8, wherein, The shape of the through hole includes one of a polygon, a circle or an ellipse.

10. The lamination tool of claim 8, wherein, ​

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