Adhesive film for photovoltaic module

Abstract

The utility model relates to the field of photovoltaic technology, in particular to an adhesive film for a photovoltaic module, which comprises an adhesive film body, the adhesive film body is provided with a first surface and a second surface which are distributed oppositely, and the first surface is provided with a first texture part, a second texture part, a third texture part, a fourth texture part, a fifth texture part and a sixth texture part which are spliced in sequence; a first protruding part is arranged at the joint of the first texture part and the second texture part, a second protruding part is arranged at the joint of the fifth texture part and the sixth texture part, and a third protruding part and a fourth protruding part are arranged at the joint of the third texture part and the fourth texture part. The third protruding parts and the fourth protruding parts are distributed at intervals in the length extending direction of the adhesive film body, and the first protruding parts and the second protruding parts are distributed at intervals in the width extending direction of the adhesive film body. According to the adhesive film for the photovoltaic module, bubbles can be reduced during lamination, and the problem of delamination is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to photovoltaic technology field, specifically, relate to a kind of adhesive film for photovoltaic module. BACKGROUND

[0002] Photovoltaic module is a kind of common semiconductor device for converting solar energy into electrical energy.The packaging of photovoltaic module is an important process step in the production of photovoltaic module.

[0003] DBB component (also known as no main grid component, Dense-Busbar) needs to use adhesive film in packaging;However, in lamination, the adhesive film provided by the related art is prone to air bubbles and delamination problems. SUMMARY

[0004] The utility model aims to provide an adhesive film for photovoltaic module, which can reduce the occurrence of air bubbles and improve the problem of delamination when laminating.

[0005] Embodiments of the utility model can be implemented as follows:

[0006] The utility model provides an adhesive film for photovoltaic module, comprising: an adhesive film body, the adhesive film body has a first face and a second face distributed in opposite directions, the first face has a first texture part, a second texture part, a fifth texture part and a sixth texture part;Wherein,

[0007] The first texture part and the second texture part have a first protruding part at the joint, the fifth texture part and the sixth texture part have a second protruding part at the joint, and the first protruding part and the second protruding part are spaced apart along the width extension direction of the adhesive film body.

[0008] In an optional embodiment, the photovoltaic module includes a plurality of first protrusions and a plurality of second protrusions connected to the first face, and the plurality of first protrusions are arranged in the first texture part in sequence, the plurality of second protrusions are arranged in the second texture part in sequence, the first protrusions are arc-shaped, and the convex surface of the first protrusions faces the second texture part;The height of the first protrusion close to the second texture part is greater than the height of the first protrusion away from the second texture part, to form the first protruding part;And / or,

[0009] The second protrusions are arc-shaped, and the convex surface of the second protrusions faces the first texture part;The height of the second protrusion close to the first texture part is greater than the height of the second protrusion away from the first texture part, to form the first protruding part.

[0010] In an optional embodiment, the height of the plurality of first protrusions gradually increases in the direction of the first texture part pointing to the second texture part;

[0011] The height of the plurality of second protrusions gradually increases in the direction of the second texture part pointing to the first texture part.

[0012] In an optional embodiment, the circle centers of the plurality of first protrusions are arranged on the same setting axis, the circle center angle of the first protrusion close to the second textured portion is smaller than the circle center angle of the first protrusion away from the second textured portion; and / or,

[0013] The circle center angle of the plurality of first protrusions gradually decreases in the direction from the first textured portion to the second textured portion.

[0014] In an optional embodiment, the circle centers of the plurality of second protrusions are arranged on the same setting axis, the circle center angle of the second protrusion close to the first textured portion is smaller than the circle center angle of the second protrusion away from the first textured portion; and / or,

[0015] The circle center angle of the plurality of second protrusions gradually decreases in the direction from the second textured portion to the first textured portion.

[0016] In an optional embodiment, the height of at least one of the first protrusion and the second protrusion gradually increases and then gradually decreases along the length extension direction thereof.

[0017] In an optional embodiment, the first surface further has a third textured portion and a fourth textured portion, the first textured portion, the second textured portion, the third textured portion, the fourth textured portion, the fifth textured portion and the sixth textured portion are arranged in sequence, and the third textured portion and the fourth textured portion have a third protruding portion and a fourth protruding portion at the joint thereof, the third protruding portion and the fourth protruding portion are spaced apart along the length extension direction of the adhesive film body.

[0018] In an optional embodiment, the adhesive film for photovoltaic modules further comprises a plurality of third protrusions and a plurality of fourth protrusions connected to the first surface, the plurality of third protrusions are arranged in sequence in the third textured portion, and the plurality of fourth protrusions are arranged in sequence in the fourth textured portion;

[0019] The third protrusion is arc-shaped, and the convex surface of the third protrusion faces the second textured portion; and / or,

[0020] The fourth protrusion is arc-shaped, and the convex surface of the fourth protrusion faces away from the third textured portion.

[0021] In an optional embodiment, the height of the two ends of the length extension direction of the third protrusion is greater than the height of the middle part thereof, so as to form the third protruding portion and the fourth protruding portion respectively; and / or,

[0022] The height of the two ends of the length extension direction of the fourth protrusion is greater than the height of the middle part thereof, so as to form the third protruding portion and the fourth protruding portion respectively.

[0023] In an optional embodiment, the height of the third protrusion close to the fourth textured portion is greater than the height of the third protrusion away from the fourth textured portion; and / or,

[0024] The height of the plurality of third protrusions gradually increases in the direction from the third textured portion to the fourth textured portion.

[0025] In optional embodiments, the height of the fourth protrusions close to the third texture portion is greater than the height of the fourth protrusions away from the third texture portion; and / or,

[0026] The height of the fourth protrusions gradually increases in a direction from the fourth texture portion to the third texture portion.

[0027] In optional embodiments, the centers of the third protrusions are distributed on the same set axis, and the central angle of the third protrusions close to the second texture portion is greater than the central angle of the third protrusions away from the second texture portion; and / or,

[0028] The centers of the fourth protrusions are distributed on the same set axis, and the central angle of the fourth protrusions close to the third texture portion is smaller than the central angle of the fourth protrusions away from the third texture portion.

[0029] In optional embodiments, the adhesive film for photovoltaic modules further comprises a plurality of fifth protrusions and a plurality of sixth protrusions connected to the first face, the plurality of fifth protrusions are arranged in a fifth texture portion in sequence, and the plurality of sixth protrusions are arranged in a sixth texture portion in sequence.

[0030] The fifth protrusions are arc-shaped, and the convex surface of the fifth protrusions faces the sixth texture portion; and / or,

[0031] The sixth protrusions are arc-shaped, and the convex surface of the sixth protrusions faces the fifth texture portion.

[0032] In optional embodiments, the height of the fifth protrusions close to the sixth texture portion is greater than the height of the fifth protrusions away from the sixth texture portion, so as to form a second raised portion; and / or,

[0033] The height of the sixth protrusions close to the fifth texture portion is greater than the height of the sixth protrusions away from the fifth texture portion, so as to form a second raised portion.

[0034] In optional embodiments, the height of at least one of the fifth protrusions and the sixth protrusions gradually increases and then gradually decreases along the length extension direction thereof, so that the second raised portion is formed at the middle of the length extension direction of the fifth protrusions or the sixth protrusions.

[0035] In optional embodiments, the centers of the fifth protrusions are arranged on the same set axis, and the central angle of the fifth protrusions close to the sixth texture portion is smaller than the central angle of the fifth protrusions away from the sixth texture portion; and / or,

[0036] The centers of the sixth protrusions are arranged on the same set axis, and the central angle of the sixth protrusions close to the fifth texture portion is smaller than the central angle of the sixth protrusions away from the fifth texture portion.

[0037] The beneficial effect of the photovoltaic module adhesive film of the embodiment of the present application comprises: the photovoltaic module adhesive film provided by the embodiment of the present application comprises an adhesive film body, the first surface of the adhesive film body has a first texture part, a second texture part, a fifth texture part and a sixth texture part, wherein the first texture part and the second texture part have a first protruding part at the joint, the fifth texture part and the sixth texture part have a second protruding part at the joint, and the first protruding part and the second protruding part are distributed at intervals along the width extension direction of the adhesive film body. In this way, the first surface of the adhesive film body forms two protruding parts, and the two protruding parts are approximately distributed at both ends of the width direction of the adhesive film body, the thickness of the corresponding positions of the two protruding parts is large, when laminated and packaged, the melted adhesive flows from the thick position to the thin position, the flowing adhesive can drive out the gas to reduce the generation of bubbles, and the melted adhesive flows to the position with relatively thin thickness, which also plays a role of adhesive supplement to ensure that the position with relatively thin thickness also has sufficient adhesive for gluing, thereby improving the gluing stability and solving the problem of delamination.

[0038] The adhesive film provided by the embodiment of the present application reduces the generation of bubbles and improves the problem of delamination when laminated, does not additionally set adhesive strips, and is also beneficial to reducing the cost. BRIEF DESCRIPTION OF DRAWINGS

[0039] In order to more clearly illustrate the technical scheme of the embodiment of the present application, the following will briefly introduce the drawings needed to be used in the embodiment, and it should be understood that the following drawings only show some embodiments of the present application, and should not be regarded as a limitation to the scope, and for those skilled in the art, other related drawings can also be obtained without creative labor on the basis of the drawings.

[0040] Figure 1 It is a structure schematic view of the adhesive film for photovoltaic module in the embodiment of the present application.

[0041] Figure 2 It is a structure schematic view of the first texture part and the second texture part of the adhesive film for photovoltaic module in the embodiment of the present application.

[0042] Figure 3 It is a structure schematic view of the adhesive film body and the first protruding strip in the embodiment of the present application.

[0043] Figure 4 It is a structure schematic view of the third texture part and the fourth texture part of the adhesive film for photovoltaic module in the embodiment of the present application.

[0044] Figure 5 It is a structure schematic view of the adhesive film body and the third protruding strip in the embodiment of the present application.

[0045] Icon: 010 - adhesive film for photovoltaic module; 100 - adhesive film body; 101 - first protruding part; 102 - second protruding part; 103 - third protruding part; 104 - fourth protruding part; 110 - first textured part; 111 - first protruding line; 120 - second textured part; 121 - second protruding line; 130 - third textured part; 131 - third protruding line; 140 - fourth textured part; 141 - fourth protruding line; 150 - fifth textured part; 151 - fifth protruding line; 160 - sixth textured part; 161 - sixth protruding line. DETAILED DESCRIPTION

[0046] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0047] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present application.

[0048] It should be noted that: similar reference numbers and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0049] In the description of the present application, it should be noted that if the terms "upper", "lower", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, or the orientation or positional relationship of the product of the present application when it is usually placed, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, therefore, it cannot be understood as a limitation on the present application.

[0050] In addition, if the terms "first", "second" and the like appear, they are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0051] It should be noted that the features in the embodiments of the present application can be combined with each other without conflict.

[0052] The adhesive film provided by the related technology is prone to bubbles and delamination when laminated; in order to improve the above problems, the related technology additionally lays adhesive film strips at the positions of the long edges and the positions of the short edges of the adhesive film to increase the thickness of the adhesive film at the positions of the long edges and the positions of the short edges, so that the melted adhesive can flow from the thick positions to the middle thin positions; however, this additional laying of adhesive film strips not only increases the cost, but also is prone to unmelted problems, and is also prone to offsetting the battery string when the adhesive film melts, flows and diffuses, that is, is prone to causing the battery string to shift and the parallel string phenomenon to occur, and even is prone to causing the glass to have the light transmission phenomenon due to the offset battery string.

[0053] In order to improve the above problems, the embodiment provides an adhesive film for photovoltaic modules, which can effectively reduce the generation of bubbles and improve the delamination problem, reduce the cost, improve the unmelted problem, reduce the string distance risk, increase the friction between the adhesive film and the glass, and prevent slipping.

[0054] Please refer to Figure 1 The adhesive film for photovoltaic modules 010 is used to connect the battery string and the glass; wherein the adhesive film for photovoltaic modules 010 comprises an adhesive film body 100, the adhesive film body 100 has a first face and a second face distributed in opposite directions, the first face is provided with a texture, specifically, the first face has a first textured portion 110, a second textured portion 120, a fifth textured portion 150 and a sixth textured portion 160; wherein the first textured portion 110 and the second textured portion 120 have a first protruding portion 101 at the joint therebetween, the fifth textured portion 150 and the sixth textured portion 160 have a second protruding portion 102 at the joint therebetween, and the first protruding portion 101 and the second protruding portion 102 are spaced apart and distributed along the width extension direction of the adhesive film body 100. In this way, the first face of the adhesive film body 100 forms two protruding portions, and the two protruding portions are approximately distributed at both ends of the width direction of the adhesive film body 100, the adhesive film thickness at the corresponding positions of the two protruding portions is large, when laminated and packaged, the melted adhesive flows from the thick positions to the thin positions, that is, the flowing adhesive can drive out the gas to reduce the generation of bubbles, and the melted adhesive flowing to the positions with relatively thin thickness also has the effect of adhesive supplementing, so as to ensure that the positions with relatively thin thickness also have sufficient adhesive for gluing, thereby improving the gluing stability and improving the delamination problem; the adhesive film provided by the embodiment reduces the generation of bubbles and improves the delamination problem when laminated by adjusting the texture, and does not additionally set the adhesive strips, which is also beneficial to reducing the cost.

[0055] Further, the first surface further has a third textured portion 130 and a fourth textured portion 140, the first textured portion 110, the second textured portion 120, the third textured portion 130, the fourth textured portion 140, the fifth textured portion 150 and the sixth textured portion 160 are arranged in sequence, and the third textured portion 130 and the fourth textured portion 140 have a third protruding portion 103 and a fourth protruding portion 104 at the joint thereof, the third protruding portion 103 and the fourth protruding portion 104 are distributed at intervals along the length direction of the adhesive film body 100. In this way, the first surface of the adhesive film body 100 has four protruding portions, and the four protruding portions are distributed at the four edges of the adhesive film body 100 approximately, when laminating and packaging, the melted adhesive flows from the thick position to the thin position, so that the flowing adhesive can drive out the gas to reduce the generation of bubbles, and the melted adhesive flows to the position where the adhesive film is thin, which can also play a role of supplementing the adhesive to ensure that the position which is originally thin can also have sufficient adhesive for gluing, thereby improving the gluing stability and solving the problem of delamination.

[0056] It should be noted that the first protruding portion 101, the second protruding portion 102, the third protruding portion 103 and the fourth protruding portion 104 are arranged at the positions corresponding to the four edges of the adhesive film body 100; when laminating, the adhesive at the four protruding portions will flow to the battery string after melting, and the adhesive flowing from the four edges to the battery string can act on the battery string more uniformly to improve the phenomenon of displacement and overlap of the battery string.

[0057] Please refer to Figure 1 and Figure 2In the embodiment, the photovoltaic module includes a plurality of first protrusions 111 and a plurality of second protrusions 121 connected to the first surface, the plurality of first protrusions 111 are sequentially arranged in the first textured portion 110 along the width direction of the film body 100, the plurality of second protrusions 121 are sequentially arranged in the second textured portion 120 along the width direction of the film body 100, the first protrusions 111 are arc-shaped, the convex surface of the first protrusions 111 faces the second textured portion 120, the two ends of the length direction of the first protrusions 111 respectively extend to the two ends of the length direction of the film body 100, the second protrusions 121 are arc-shaped, the convex surface of the second protrusions 121 faces the first textured portion 110, the two ends of the length direction of the second protrusions 121 respectively extend to the two ends of the length direction of the film body 100; the height of the first protrusions 111 close to the second textured portion 120 is greater than the height of the first protrusions 111 away from the second textured portion 120, the height of the second protrusions 121 close to the first textured portion 110 is greater than the height of the second protrusions 121 away from the first textured portion 110, in this way, the first protrusions 111 and the second protrusions 121 with higher height can jointly form the first protruding portion 101, and the plurality of first protrusions 111 of the first textured portion 110 form a distribution spreading to the outer periphery of the film body 100 in the length direction of the film body 100, so as to ensure the molten glue to flow smoothly to the position of the outer periphery with thinner film thickness during lamination, thereby effectively improving the problems of bubbles and delamination; correspondingly, the plurality of second protrusions 121 of the second textured portion 120 form a distribution spreading to the middle part of the film body 100 in the length direction of the film body 100, so as to ensure the molten glue to flow smoothly to the position of the middle part with thinner film thickness during lamination, thereby effectively improving the problems of bubbles and delamination.

[0058] Of course, in other embodiments, the second protrusions 121 can also be straight lines, and the heights of the second protrusions 121 can also be the same.

[0059] In other embodiments, the heights of the first protrusions 111 can also be the same, and only the second protrusions 121 close to the first textured portion 110 with higher height form the first protruding portion 101.

[0060] Optionally, the heights of the plurality of first protrusions 111 gradually increase in the direction from the first textured portion 110 to the second textured portion 120; the heights of the plurality of second protrusions 121 gradually increase in the direction from the second textured portion 120 to the first textured portion 110. In this way, the textured structure gradually decreasing on both sides of the first protruding portion 101 can be formed, so as to ensure the fluidity of the molten film during lamination, thereby improving the problems of bubbles and delamination.

[0061] Optionally, please refer to Figure 3, the height of the first protrusions 111 gradually increases and then gradually decreases along the length direction of the first protrusions 111, and the height of the second protrusions 121 gradually increases and then gradually decreases along the length direction of the second protrusions 121 (not shown, please refer to the illustration of the second protrusions 121), that is, the height of the middle part of the first protrusions 111 is greater than the height of the two ends of the first protrusions 111, and the height of the middle part of the second protrusions 121 is greater than the height of the two ends of the second protrusions 121. In this way, the first protrusions 101 can be arranged at the middle part of the length direction of the adhesive film body 100, which facilitates the smooth flow of the molten adhesive to the length direction of the adhesive film body 100 during lamination, and further ensures that the end part of the length direction of the adhesive film body 100 can be reliably glued, thereby improving the delamination problem.

[0062] Of course, in other embodiments, the height of any one of the first protrusions 111 and the second protrusions 121 is equal in the length direction of the first protrusions 111 and the second protrusions 121, and the height of the highest first protrusions 111 and the highest second protrusions 121 is the same. In this way, it is beneficial to enable the glass to simultaneously contact the highest first protrusions 111 and the highest second protrusions 121, that is, the glass can simultaneously contact the first protrusions 111 and the second protrusions 121 at the position of the first protrusions 101, so as to increase the contact area between the glass and the adhesive film, and further increase the roughness of the position where the adhesive film contacts the glass, and increase the friction between the glass and the adhesive film, so as to improve the problem of glass slipping.

[0063] Alternatively, in other embodiments, the height of any one of the first protrusions 111 and the second protrusions 121 is equal in the length direction of the first protrusions 111 and the second protrusions 121.

[0064] Optionally, please refer to Figure 2 , the centers of the first protrusions 111 are distributed on the same setting axis, and the central angle of the first protrusions 111 close to the second texture part 120 is smaller than the central angle of the first protrusions 111 away from the second texture part 120; in this way, the first protrusions 111 can be distributed in a diffused manner at the end part of the length direction of the adhesive film body 100, and the arrangement of the first protrusions 111 close to the middle part of the length direction of the adhesive film body 100 is closer than the arrangement of the first protrusions 111 close to the end part of the length direction of the adhesive film body 100, so as to facilitate the flow of the molten adhesive to the end part of the length direction of the adhesive film body 100 and the edge of the width direction of the adhesive film body 100 during lamination.

[0065] Further, along the direction from the first textured portion 110 to the second textured portion 120, the central angles of the first protrusions 111 gradually decrease. In this way, the distribution density between the first protrusions 111 gradually decreases from the middle of the first protrusions 111 to the ends of the first protrusions 111 in the length direction, so as to form a distribution of high density in the middle and low density at the ends, thereby ensuring that the melted glue reliably flows to the outer periphery of the film body 100.

[0066] Optionally, referring to Figure 2 , the central angles of the second protrusions 121 gradually decrease along the direction from the second textured portion 120 to the first textured portion 110. In this way, the distribution density between the second protrusions 121 gradually decreases from the middle of the second protrusions 121 to the ends of the second protrusions 121 in the length direction, so as to form a distribution of high density in the middle and low density at the ends, thereby ensuring that the melted glue reliably flows to the ends and the middle of the film body 100 in the length direction.

[0067] Further, along the direction from the first textured portion 110 to the second textured portion 120, the central angles of the first protrusions 111 gradually decrease. In this way, the distribution density between the first protrusions 111 gradually decreases from the middle of the first protrusions 111 to the ends of the first protrusions 111 in the length direction, so as to form a distribution of high density in the middle and low density at the ends, thereby ensuring that the melted glue reliably flows to the outer periphery of the film body 100.

[0068] Optionally, referring to Figure 1 and Figure 4 In this embodiment, the film 010 for photovoltaic modules further comprises a plurality of third protrusions 131 and a plurality of fourth protrusions 141 connected to the first surface, the plurality of third protrusions 131 are arranged in the third textured portion 130 in sequence, and the plurality of fourth protrusions 141 are arranged in the fourth textured portion 140 in sequence; the third protrusions 131 are arc-shaped, and the convex surfaces of the third protrusions 131 face the second textured portion 120; the fourth protrusions 141 are arc-shaped, and the convex surfaces of the fourth protrusions 141 are away from the third textured portion 130; the ends of the third protrusions 131 and the fourth protrusions 141 in the length direction respectively extend to the ends of the film body 100 in the length direction. In this way, the third protrusions 131 and the fourth protrusions 141 form a texture that spreads from the middle to the outer periphery of the film body 100, which is conducive to ensuring that the melted glue smoothly flows to the outer periphery of the film body 100, thereby improving the bonding stability of the outer periphery of the film body 100 and solving the problem of delamination.

[0069] Of course, in other embodiments, one of the third and fourth ridges 131, 141 is straight.

[0070] Optionally, the height of the third ridges 131 near the fourth textured portion 140 is greater than the height of the third ridges 131 away from the fourth textured portion 140; with such an arrangement, the glue melted at the third raised portion 103 with greater thickness can flow smoothly to both sides of the third raised portion 103 along the width direction of the adhesive film body 100, and the glue melted at the fourth raised portion 104 with greater thickness can flow smoothly to both sides of the fourth raised portion 104 along the width direction of the adhesive film body 100, which can effectively discharge gas and reduce the generation of bubbles, and can also achieve glue filling at the edges of the adhesive film body 100 along the width direction of the adhesive film body 100 to improve the stability of the glue and effectively improve the delamination problem.

[0071] Further, the height of the third ridges 131 gradually increases from the third textured portion 130 to the fourth textured portion 140; with such an arrangement, the glue melted at the position with greater thickness can flow smoothly and stably to the position with thinner thickness along the third ridges 131 with gradually decreasing height.

[0072] Optionally, the height of the fourth ridges 141 near the third textured portion 130 is greater than the height of the fourth ridges 141 away from the third textured portion 130; with such an arrangement, the glue melted at the third raised portion 103 with greater thickness can flow smoothly to both sides of the third raised portion 103 along the width direction of the adhesive film body 100, and the glue melted at the fourth raised portion 104 with greater thickness can flow smoothly to both sides of the fourth raised portion 104 along the width direction of the adhesive film body 100, which can effectively discharge gas and reduce the generation of bubbles, and can also achieve glue filling at the edges of the adhesive film body 100 along the width direction of the adhesive film body 100 to improve the stability of the glue and effectively improve the delamination problem.

[0073] Further, the height of the fourth ridges 141 gradually increases from the fourth textured portion 140 to the third textured portion 130; with such an arrangement, the glue melted at the position with greater thickness can flow smoothly and stably to the position with thinner thickness along the fourth ridges 141 with gradually decreasing height.

[0074] Optionally, please refer to Figure 1 and Figure 5, the height of the two ends of the length extension direction of the third protruding strip 131 is greater than the height of the middle part, and the height of the two ends of the length extension direction of the fourth protruding strip 141 is greater than the height of the middle part (not shown in the figure, please refer to the figure of the third protruding strip 131), so as to form the third protruding part 103 and the fourth protruding part 104, that is, the height distribution of the two ends high and the middle low of the third protruding strip 131 and the fourth protruding strip 141, so as to form two high points (that is, the third protruding part 103 and the fourth protruding part 104) with greater thickness at the two ends of the length extension direction of the adhesive film body 100. In this way, during lamination, the melted adhesive with greater thickness will flow along the third protruding strip 131 and the fourth protruding strip 141 with gradually decreasing height to the position with thinner thickness in the middle of the adhesive film, thereby effectively discharging gas, reducing the generation of bubbles, increasing the adhesive content of the thinner position in the middle of the adhesive film, ensuring the stability of the adhesive, and improving the delamination problem.

[0075] Of course, in other embodiments, the height of the third protruding strip 131 and the fourth protruding strip 141 in the length extension direction of itself can also be equal, and the height of the third protruding strip 131 with the highest height is equal to the height of the fourth protruding strip 141 with the highest height; in this way, it is beneficial to enable the glass to contact the third protruding strip 131 and the fourth protruding strip 141 with the highest height at the same time, so as to increase the contact area between the glass and the adhesive film, and also increase the roughness of the position where the adhesive film contacts the glass, increase the friction between the glass and the adhesive film, and improve the problem of glass slipping.

[0076] Optionally, please refer to Figure 4 , the centers of the plurality of third protruding strips 131 are distributed on the same setting axis, and the central angle of the third protruding strip 131 close to the second texture part 120 is greater than the central angle of the third protruding strip 131 away from the second texture part 120; in this way, the third protruding strip 131 can form a texture distribution that diffuses to the outside of the adhesive film body 100 in the direction in which the fourth texture part 140 points to the third texture part 130, so as to enable the melted adhesive at the third protruding part 103 and the fourth protruding part 104 to stably flow and disperse under the guidance of the texture formed by the plurality of third protruding strips 131, thereby improving the uniform distribution of the adhesive.

[0077] Further, along the direction in which the third texture part 130 points to the fourth texture part 140, the central angle of the plurality of third protruding strips 131 gradually decreases, that is, along the direction in which the fourth texture part 140 points to the third texture part 130, the angle of the central angle of the plurality of third protruding strips 131 gradually increases. In this way, it can further ensure that the texture formed by the plurality of third protruding strips 131 can stably guide the flow of the melted adhesive.

[0078] Optionally, please refer to Figure 4, the circle centers of the plurality of fourth protrusions 141 are distributed on the same setting axis, and the circle center angle of the fourth protrusion 141 close to the third texture part 130 is smaller than the circle center angle of the fourth protrusion 141 far from the third texture part 130; in this way, the fourth protrusions 141 can form a texture distribution diffusing to the outside of the adhesive film body 100 in the direction in which the third texture part 130 points to the fourth texture part 140, so that the melted adhesive at the third protrusion part 103 and the fourth protrusion part 104 can flow and disperse stably under the guidance of the texture formed by the plurality of fourth protrusions 141, thereby improving the uniform distribution of the adhesive.

[0079] Further, the circle center angle of the plurality of fourth protrusions 141 gradually increases in the direction in which the third texture part 130 points to the fourth texture part 140, that is, the circle center angle of the plurality of third protrusions 131 gradually decreases in the direction in which the fourth texture part 140 points to the third texture part 130. In this way, the texture formed by the plurality of fourth protrusions 141 can further ensure the stable guidance of the flow of the melted adhesive.

[0080] In the embodiment, please refer to Figure 1 The adhesive film 010 for photovoltaic modules further comprises a plurality of fifth protrusions 151 and a plurality of sixth protrusions 161 connected to the first surface, the plurality of fifth protrusions 151 are arranged in the fifth texture part 150 in sequence, and the two ends of the length direction of the fifth protrusion 151 extend to the two ends of the length direction of the adhesive film body 100, the plurality of sixth protrusions 161 are arranged in the sixth texture part 160 in sequence, and the two ends of the length direction of the sixth protrusion 161 extend to the two ends of the length direction of the adhesive film body 100; the fifth protrusion 151 is arc-shaped, and the convex surface of the fifth protrusion 151 faces the sixth texture part 160; the sixth protrusion 161 is arc-shaped, and the convex surface of the sixth protrusion 161 faces the fifth texture part 150; the height of the fifth protrusion 151 close to the sixth texture part 160 is greater than the height of the fifth protrusion 151 far from the sixth texture part 160, and the height of the sixth protrusion 161 close to the fifth texture part 150 is greater than the height of the sixth protrusion 161 far from the fifth texture part 150; in this way, the fifth protrusion 151 and the sixth protrusion 161 with higher height can be used to form the second protrusion part 102 together. The plurality of sixth protrusions 161 of the sixth texture part 160 form a distribution diffusing to the outer periphery of the adhesive film body 100 in the length direction of the adhesive film body 100, so as to ensure the smooth flow of the melted adhesive to the position of the outer periphery with thinner thickness of the adhesive film during lamination, thereby effectively improving the problems of bubbles and delamination; correspondingly, the plurality of fifth protrusions 151 of the fifth texture part 150 form a distribution diffusing to the middle part of the adhesive film body 100 in the length direction of the adhesive film body 100, so as to ensure the smooth flow of the melted adhesive to the position of the middle part with thinner thickness of the adhesive film during lamination, thereby effectively improving the problems of bubbles and delamination.

[0081] It should be understood that in other embodiments, one of the fifth ridges 151 and the sixth ridges 161 can also be straight lines.

[0082] In other embodiments, the height of each fifth ridge 151 can also be the same, and only the sixth ridges 161 near the fifth texture 150 are higher in height to form the second protruding portion 102.

[0083] Optionally, the height of the plurality of fifth ridges 151 gradually increases in the direction in which the fifth texture 150 points to the sixth texture 160, and the height of the plurality of sixth ridges 161 gradually increases in the direction in which the sixth texture 160 points to the fifth texture 150. In this way, a gradually decreasing texture structure can be formed on both sides of the second protruding portion 102, so as to ensure the flowability of the melted adhesive film during lamination, thereby improving the problems of air bubbles and delamination.

[0084] Optionally, the height of the fifth ridges 151 gradually increases and then gradually decreases along the length extension direction thereof, and the height of the sixth ridges 161 gradually increases and then gradually decreases along the length extension direction thereof, that is, the height of the middle part of the fifth ridges 151 is greater than the height of both ends thereof, and the height of the middle part of the sixth ridges 161 is greater than the height of both ends thereof, so that the second protruding portion 102 is formed at the middle part of the length extension direction of the fifth ridges 151 or the sixth ridges 161, facilitating the smooth flow of the melted adhesive to the length extension direction of the adhesive film body 100 during lamination, thereby ensuring that the periphery of the end portion of the length extension direction of the adhesive film body 100 can be reliably glued, thereby improving the problem of delamination.

[0085] Of course, in other embodiments, the height of any one of the fifth ridges 151 and the sixth ridges 161 is the same in the length extension direction thereof, and the height of the highest fifth ridge 151 and the height of the highest sixth ridge 161 are the same. In this way, it is beneficial to enable the glass to simultaneously contact the highest sixth ridge 161 and the fifth ridge 151, that is, the glass can simultaneously contact the sixth ridge 161 and the fifth ridge 151 at the position of the second protruding portion 102, so as to increase the contact area between the glass and the adhesive film, and also to increase the roughness of the position at which the adhesive film contacts the glass, to increase the friction between the glass and the adhesive film, so as to improve the problem of glass slipping.

[0086] Alternatively, in other embodiments, the height of one of the fifth ridges 151 and the sixth ridges 161 is the same in the length extension direction thereof.

[0087] Optionally, the centers of the plurality of fifth protrusions 151 are arranged on the same set axis, and the center angle of the fifth protrusions 151 close to the sixth texture 160 is smaller than the center angle of the fifth protrusions 151 away from the sixth texture 160 (not shown in the figure, please refer to the illustration of the second protrusion 121); in this way, the plurality of fifth protrusions 151 can form a diffused distribution at the end of the length direction of the film body 100, and the arrangement of the plurality of fifth protrusions 151 close to the middle of the length direction of the film body 100 is tighter than the arrangement of the plurality of fifth protrusions 151 close to the end of the length direction of the film body 100, so as to facilitate the flow of molten glue to the end of the length direction of the film body 100 during lamination.

[0088] Further, in the direction in which the fifth texture 150 points to the sixth texture 160, the center angle of the plurality of fifth protrusions 151 gradually decreases. In this way, it is beneficial to gradually reduce the distribution density between the plurality of fifth protrusions 151 from the middle of the fifth protrusions 151 to the end of the length direction of the fifth protrusions 151, so as to form a distribution of tight middle and loose ends, and further ensure the reliable flow of molten glue to the end of the length direction of the film body 100 and the middle.

[0089] Optionally, the centers of the plurality of sixth protrusions 161 are arranged on the same set axis, and the center angle of the sixth protrusions 161 close to the fifth texture 150 is smaller than the center angle of the sixth protrusions 161 away from the fifth texture 150 (not shown in the figure, please refer to the illustration of the first protrusion 111); in this way, the plurality of sixth protrusions 161 can form a diffused distribution at the end of the length direction of the film body 100, and the arrangement of the plurality of sixth protrusions 161 close to the middle of the length direction of the film body 100 is tighter than the arrangement of the plurality of sixth protrusions 161 close to the end of the length direction of the film body 100, so as to facilitate the flow of molten glue to the end of the film body 100 and the edge of the width direction of the film body 100 during lamination.

[0090] Further, in the direction in which the sixth texture 160 points to the fifth texture 150, the center angle of the plurality of sixth protrusions 161 gradually decreases. In this way, it is beneficial to gradually reduce the distribution density between the plurality of sixth protrusions 161 from the middle of the sixth protrusions 161 to the end of the length direction of the sixth protrusions 161, so as to form a distribution of tight middle and loose ends, and further ensure the reliable flow of molten glue to the periphery of the film body 100.

[0091] Optionally, the plurality of first ridges 111 of the first textured portion 110 forms a texture that is symmetrically distributed with the texture formed by the plurality of sixth ridges 161 of the sixth textured portion 160 about a central axis of the length direction of the adhesive film body 100; and the plurality of second ridges 121 of the second textured portion 120 forms a texture that is symmetrically distributed with the texture formed by the plurality of fifth ridges 151 of the fifth textured portion 150 about the central axis of the length direction of the adhesive film body 100.

[0092] Optionally, the plurality of first ridges 111 of the first textured portion 110 forms a texture that is symmetrically distributed with the texture formed by the plurality of second ridges 121 of the second textured portion 120 about an axis between the first textured portion 110 and the second textured portion 120.

[0093] Optionally, the plurality of sixth ridges 161 of the sixth textured portion 160 forms a texture that is symmetrically distributed with the texture formed by the plurality of fifth ridges 151 of the fifth textured portion 150 about an axis between the sixth textured portion 160 and the fifth textured portion 150.

[0094] Optionally, the plurality of third ridges 131 of the third textured portion 130 forms a texture that is symmetrically distributed with the texture formed by the plurality of fourth ridges 141 of the fourth textured portion 140 about an axis between the third textured portion 130 and the fourth textured portion 140.

[0095] Optionally, at least one of the highest first ridge 111, the highest second ridge 121, the highest third ridge 131, the highest fourth ridge 141, the highest fifth ridge 151, and the highest sixth ridge 161 has a height of 0.015-0.85 mm, such as 0.015 mm, 0.020 mm, 0.025 mm, 0.050 mm, 0.070 mm, 0.100 mm, 0.200 mm, 0.300 mm, 0.400 mm, 0.500 mm, 0.600 mm, 0.700 mm, 0.850 mm, etc., which is not limited herein. In this way, the highest height of at least one of the first raised portion 101, the second raised portion 102, the third raised portion 103, and the fourth raised portion 104 can reach 0.015-0.85 mm, which on one hand can increase the local thickness of the adhesive film; on the other hand can reduce the risk of causing cracks in the glass or the battery string; and on the other hand can avoid the thickness of the first raised portion 101, the second raised portion 102, the third raised portion 103, and the fourth raised portion 104 being too large, thereby causing the problem of incomplete melting of the adhesive film at some positions during lamination.

[0096] Compared with the related technology of additionally arranging adhesive tape strips on the long side and the short side of the adhesive film to improve the problems of bubbles and delamination during lamination, the additional adhesive tape strips may not match the adhesive film in terms of gram weight, material, etc., or the thickness of the adhesive tape strips may be too large, thereby causing unmelted problems. Through the new texture design of the adhesive film and the design of the four protruding portions, the adhesive tape strips do not need to be additionally introduced, the problem of mismatch between the gram weight and material of the adhesive tape strips and the adhesive film can be overcome, that is, the problems of bubbles and delamination during lamination can be reduced, and the height of the first protruding portion 101, the second protruding portion 102, the third protruding portion 103, and the fourth protruding portion 104 can be controlled through the texture design to effectively improve the unmelted problems.

[0097] It should be noted that in the embodiment in which any one of the first protruding strip 111, the second protruding strip 121, the third protruding strip 131, the fourth protruding strip 141, the fifth protruding strip 151, and the sixth protruding strip 161 is a non-equal-height protruding strip, the height difference between the lowest point and the highest point is > 0 and ≤ 0.835 mm. Taking the first protruding strip 111 as an example, the height of the highest point of the middle part of the first protruding strip 111 can be 0.850 mm, and the height of the lowest point of both ends of the first protruding strip 111 can be 0.015 mm. The height difference between the highest point and the lowest point of the first protruding strip 111 is 0.835 mm.

[0098] Optionally, at least one of the height difference between the two adjacent first protruding strips 111, the height difference between the adjacent second protruding strips 121, the height difference between the adjacent third protruding strips 131, the height difference between the adjacent fourth protruding strips 141, the height difference between the adjacent fifth protruding strips 151, and the height difference between the adjacent sixth protruding strips 161 is 0.0005-0.0020 mm, for example, 0.0005 mm, 0.0010 mm, 0.0015 mm, 0.0020 mm, etc., which is not limited specifically herein. In this way, the texture on the adhesive film body 100 can present a more gentle concave-convex distribution, which is beneficial to improve the problem of hidden cracks on the glass or battery string.

[0099] Optionally, the central angle of at least one of the first protruding strip 111, the second protruding strip 121, the third protruding strip 131, the fourth protruding strip 141, the fourth protruding strip 141, the fifth protruding strip 151, and the sixth protruding strip 161 is 20-55°, for example, 20°, 30°, 35°, 40°, 55°, etc., which is not limited specifically herein.

[0100] Optionally, at least one of the central angle difference between two adjacent first convex strips 111, the central angle difference between two adjacent second convex strips 121, the central angle difference between two adjacent third convex strips 131, the central angle difference between two adjacent fourth convex strips 141, the central angle difference between two adjacent fifth convex strips 151, and the central angle difference between two adjacent sixth convex strips 161 is 0.5-5°, for example: 0.5°, 1°, 2°, 3°, 4°, 5°, etc., which is not limited herein. In this way, the texture on the adhesive film body 100 can be distributed more gently, so as to ensure the uniformity of the adhesive during lamination, thereby effectively improving the delamination problem.

[0101] In summary, the adhesive film 010 for photovoltaic modules of the present application can be used as at least one of the front film and the back film of the photovoltaic module, and the adhesive film for photovoltaic modules can reduce the occurrence of bubbles during lamination, and improve the problems of delamination, and improve the problems of incomplete fusion, cell string offset, etc.

[0102] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited thereto, and any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. An encapsulant film for photovoltaic modules, characterized by, The application relates to a photovoltaic module, comprising: a film body (100) having a first face and a second face oppositely arranged, the first face having a first textured portion (110), a second textured portion (120), a fifth textured portion (150) and a sixth textured portion (160); wherein, a first protrusion (101) is arranged at the joint of the first textured portion (110) and the second textured portion (120), and a second protrusion (102) is arranged at the joint of the fifth textured portion (150) and the sixth textured portion (160), the first protrusion (101) and the second protrusion (102) are arranged at intervals along the width extension direction of the film body (100).

2. The encapsulant film for photovoltaic modules according to claim 1, wherein a plurality of first protrusions (111) and a plurality of second protrusions (121) are connected to the first face, the plurality of first protrusions (111) are arranged in sequence in the first textured portion (110), and the plurality of second protrusions (121) are arranged in sequence in the second textured portion (120), the first protrusions (111) are arc-shaped, the convex surface of the first protrusions (111) faces the second textured portion (120), the height of the first protrusions (111) close to the second textured portion (120) is greater than the height of the first protrusions (111) away from the second textured portion (120), so as to form the first protrusion (101); and / or, the second protrusions (121) are arc-shaped, the convex surface of the second protrusions (121) faces the first textured portion (110), the height of the second protrusions (121) close to the first textured portion (110) is greater than the height of the second protrusions (121) away from the first textured portion (110), so as to form the first protrusion (101).

3. The encapsulant film for photovoltaic modules according to claim 2, characterized by, along the direction from the first textured portion (110) to the second textured portion (120), the height of the plurality of first protrusions (111) gradually increases; along the direction from the second textured portion (120) to the first textured portion (110), the height of the plurality of second protrusions (121) gradually increases; and / or, the centers of the plurality of first protrusions (111) are arranged on the same setting axis, the central angle of the first protrusions (111) close to the second textured portion (120) is smaller than the central angle of the first protrusions (111) away from the second textured portion (120); and / or, the centers of the plurality of second protrusions (121) are arranged on the same setting axis, the central angle of the second protrusions (121) close to the first textured portion (110) is smaller than the central angle of the second protrusions (121) away from the first textured portion (110); and / or, the height of at least one of the first protrusions (111) and the second protrusions (121) gradually increases and then gradually decreases along the length extension direction thereof.

4. The encapsulant film for photovoltaic modules according to claim 1, wherein The first surface further has a third textured portion (130) and a fourth textured portion (140), the first textured portion (110), the second textured portion (120), the third textured portion (130), the fourth textured portion (140), the fifth textured portion (150) and the sixth textured portion (160) are arranged in sequence, and the third textured portion (130) and the fourth textured portion (140) have a third protrusion (103) and a fourth protrusion (104) at the joint, the third protrusion (103) and the fourth protrusion (104) are spaced along the length extension direction of the adhesive film body (100).

5. The encapsulant film for photovoltaic modules according to claim 4, wherein The adhesive film for photovoltaic modules further comprises a plurality of third protrusions (131) and a plurality of fourth protrusions (141) connected to the first surface, the plurality of third protrusions (131) are arranged in sequence in the third textured portion (130), and the plurality of fourth protrusions (141) are arranged in sequence in the fourth textured portion (140); The third protrusions (131) are arc-shaped, and the convex surface of the third protrusions (131) faces the second textured portion (120); and / or, The fourth protrusions (141) are arc-shaped, and the convex surface of the fourth protrusions (141) faces away from the third textured portion (130).

6. The encapsulant film for photovoltaic modules according to claim 5, wherein The height of both ends of the length extension direction of the third protrusions (131) is greater than the height of the middle part, so as to form the third protrusion (103) and the fourth protrusion (104) respectively; and / or, The height of both ends of the length extension direction of the fourth protrusions (141) is greater than the height of the middle part, so as to form the third protrusion (103) and the fourth protrusion (104) respectively.

7. The encapsulant film for photovoltaic modules according to claim 5 or 6, wherein The height of the third protrusions (131) close to the fourth textured portion (140) is greater than the height of the third protrusions (131) away from the fourth textured portion (140); and / or, The height of the fourth protrusions (141) close to the third textured portion (130) is greater than the height of the fourth protrusions (141) away from the third textured portion (130).

8. The encapsulant film for photovoltaic modules according to claim 5, wherein The centers of the plurality of third protrusions (131) are distributed on the same setting axis, and the central angle of the third protrusions (131) close to the second textured portion (120) is greater than the central angle of the third protrusions (131) away from the second textured portion (120); and / or, The centers of the plurality of fourth protrusions (141) are distributed on the same setting axis, and the central angle of the fourth protrusions (141) close to the third textured portion (130) is smaller than the central angle of the fourth protrusions (141) away from the third textured portion (130).

9. The encapsulant film for photovoltaic modules according to claim 1, wherein The adhesive film for photovoltaic modules further comprises a plurality of fifth protrusions (151) and a plurality of sixth protrusions (161) connected to the first surface, the plurality of fifth protrusions (151) are arranged in sequence in the fifth textured portion (150), and the plurality of sixth protrusions (161) are arranged in sequence in the sixth textured portion (160). The fifth convex strip (151) is arc-shaped, and the convex surface of the fifth convex strip (151) faces the sixth textured portion (160); and / or, The sixth convex strip (161) is arc-shaped, and the convex surface of the sixth convex strip (161) faces the fifth textured portion (150).

10. The encapsulant film for photovoltaic modules according to claim 9, wherein The height of the fifth convex strip (151) close to the sixth textured portion (160) is greater than the height of the fifth convex strip (151) away from the sixth textured portion (160), so as to form the second convex portion (102); and / or, The height of the sixth convex strip (161) close to the fifth textured portion (150) is greater than the height of the sixth convex strip (161) away from the fifth textured portion (150), so as to form the second convex portion (102); and / or, The height of at least one of the fifth convex strip (151) and the sixth convex strip (161) gradually increases and then gradually decreases along the length extension direction thereof, so that the second convex portion (102) is formed at the middle of the length extension direction of the fifth convex strip (151) or the sixth convex strip (161); and / or, The centers of a plurality of the fifth convex strips (151) are arranged on the same set axis, and the central angle of the fifth convex strip (151) close to the sixth textured portion (160) is smaller than the central angle of the fifth convex strip (151) away from the sixth textured portion (160); and / or, The centers of a plurality of the sixth convex strips (161) are arranged on the same set axis, and the central angle of the sixth convex strip (161) close to the fifth textured portion (150) is smaller than the central angle of the sixth convex strip (161) away from the fifth textured portion (150).

Images