Photovoltaic module and seal

Abstract

The utility model relates to a photovoltaic module and a sealing member. The photovoltaic module comprises a laminated part, wherein the laminated part comprises a first packaging part, a second packaging part and a battery string layer; the first packaging part and the second packaging part are oppositely arranged along a first direction; the battery string layer is positioned between the first packaging part and the second packaging part; the first packaging piece is provided with lead holes through which at least two lead-out wires connected with the battery string layer penetrate; the sealing element is provided with at least one through hole through which the corresponding leading-out wire passes; wherein the sealing element comprises a sealing part extending into the lead hole, and a main body part positioned outside the lead hole; the through hole comprises a wire inlet end located on the sealing part and a wire outlet end located on the main body part, and a connecting line of the wire inlet end and the wire outlet end intersects with the first direction. Therefore, according to the photovoltaic module and the sealing element provided by the invention, the water vapor erosion on the battery string layer of the photovoltaic module can be reduced.

Description

Technical Field

[0001] The present application relates to the field of photovoltaic technology, and in particular to photovoltaic modules and seals. Background Art

[0002] Photovoltaic cells are sensitive to moisture. Water vapor penetration can cause significant power degradation and reliability issues. Therefore, areas where moisture may penetrate need to be sealed.

[0003] In the related art, the back glass of a photovoltaic module is provided with lead holes for busbars connecting the battery strings to pass through. The busbars pass through the lead holes and then connect to the junction box. However, the battery strings are easily corroded by water vapor. Utility Model Content

[0004] Based on this, it is necessary to provide a photovoltaic module and a sealant that can reduce water vapor erosion of the cell string layer.

[0005] In a first aspect, an embodiment of the present application provides a photovoltaic module, comprising:

[0006] A laminate comprising a first package, a second package, and a battery string layer located between the first package and the second package, the first package having lead holes for passing at least two lead wires connected to the battery string layer; and

[0007] A sealing member, wherein the sealing member is provided with at least one through hole for the corresponding lead wire to pass through;

[0008] The sealing member includes a sealing portion extending into the lead-in hole and a main body portion located outside the lead-in hole;

[0009] The through hole includes an inlet end located at the sealing portion and an outlet end located at the main body portion, and a line connecting the inlet end and the outlet end intersects with the first direction.

[0010] The photovoltaic module provided in the embodiment of the present application can seal the lead hole through a sealant to improve the waterproof performance of the lead hole, alleviate the phenomenon of water vapor penetrating into the interior of the photovoltaic module through the lead hole, reduce the erosion of water vapor on the battery string layer, improve the performance of the battery string layer, reduce the adverse effects of water vapor on the efficiency and service life of the photovoltaic module, and prevent water vapor from causing failure of the photovoltaic module.

[0011] In one embodiment, the through hole extends non-linearly from the line inlet end to the line outlet end.

[0012] In one embodiment, the through hole has at least one bending section located upstream of the outlet end along the extension direction of the through hole;

[0013] Wherein, along the extension direction of the through hole, the bent section is located inside the sealing portion; and / or,

[0014] Along the extending direction of the through hole, the bent section is located inside the main body.

[0015] In one embodiment, the main body has an exposed surface of the wire outlet end with exposed through holes;

[0016] The exposed surface is non-planar.

[0017] In one embodiment, the orthographic projection of the lead hole on the reference plane is located within the outline of the orthographic projection of the main body on the reference plane, and the reference plane is a plane perpendicular to the first direction.

[0018] In one embodiment, an orthographic projection of the main body portion on the reference surface has a first contour edge;

[0019] The dimension of the main body along the first direction is gradually changed from the first contour edge to the center of the lead hole.

[0020] In one embodiment, an orthographic projection of the main body portion on the reference surface has a first contour edge;

[0021] The orthographic projection of the lead hole on the reference surface has a second contour edge;

[0022] The outlet end of the through hole is located at the first sub-main body portion of the main body portion, and the orthographic projection of the first sub-main body portion on the reference surface is determined by the first contour edge and the second contour boundary.

[0023] In one embodiment, the sealing portion completely fills the lead hole.

[0024] In one embodiment, the first package includes a first substrate and a first packaging adhesive, wherein the first packaging adhesive is located between the first substrate and the battery string layer;

[0025] The lead hole includes a first sub-lead hole and a second sub-lead hole connected to each other. The first sub-lead hole is set in the first substrate, and the second sub-lead hole is set in the first packaging glue; the sealing member fills the first sub-lead hole and the second sub-lead hole.

[0026] In one embodiment, the size of the main body along the first direction ranges from 1 mm to 2 mm;

[0027] And / or, the number of the through holes is two, and the two through holes are arranged at intervals along a second direction, and the second direction is perpendicular to the first direction;

[0028] and / or, a dimension of the main body along a second direction is less than or equal to 35 mm, and the second direction is perpendicular to the first direction;

[0029] and / or, a dimension of the main body along a third direction is less than or equal to 28 mm, and the third direction is perpendicular to the first direction;

[0030] And / or, the orthographic projection of the lead hole on the reference plane has a second contour edge, and the size range from the center of the orthographic projection of the lead hole on the reference plane to the second contour edge is 4mm-7.5mm; the reference plane is a plane perpendicular to the first direction.

[0031] In one embodiment, the photovoltaic module further comprises a junction box and an adhesive layer, wherein the junction box and the adhesive layer are both located on a side of the sealing member facing away from the second packaging member, and the adhesive layer is located between the junction box and the sealing member;

[0032] The adhesive layer includes a middle portion and an edge portion, the edge portion is arranged around the outer periphery of the middle portion, the middle portion is connected to the sealing component, and the edge portion is connected to the first packaging component.

[0033] In one embodiment, the dimension of the edge portion along the direction from the middle portion to the edge portion is greater than or equal to 1 mm;

[0034] And / or, the pull-out force between the junction box and the laminate is greater than or equal to 189N.

[0035] In a second aspect, embodiments of the present application provide a sealant for sealing a lead hole in a laminate, the laminate comprising a first package, a second package, and a battery string layer located between the first package and the second package, the first package having lead holes for passing at least two lead wires connected to the battery string layer; the sealant being in a first state before lamination of the laminate and in a second state after lamination of the laminate;

[0036] In a first state, the seal comprises:

[0037] a first portion extending into the lead hole; and

[0038] The second part is located outside the lead hole;

[0039] The sealing member is provided with at least one through hole penetrating the second portion, the through hole being connected to the lead hole for allowing the corresponding lead wire to pass through, the through hole including an inlet end and an outlet end, the inlet end and the outlet end are both located in the second portion, and a line connecting the inlet end and the outlet end is parallel to the first direction;

[0040] In the second state, part of the second part extends into the lead-wire hole and together with the first part constitutes a sealing part filled in the lead-wire hole, and the part of the second part located outside the lead-wire hole constitutes the main body; the input end is located in the sealing part, the output end is located in the main body, and the line connecting the input end and the output end intersects with the first direction.

[0041] The seal provided in the embodiment of the present application can be used to seal the lead holes of the laminate to improve the waterproof performance of the lead holes, alleviate the phenomenon of water vapor penetrating into the interior of the photovoltaic module through the lead holes, reduce the erosion of water vapor on the battery string layer, improve the performance of the battery string layer, reduce the adverse effects of water vapor on the efficiency and service life of the photovoltaic module, and prevent water vapor from causing failure of the photovoltaic module.

[0042] In one embodiment, in the first state, the size of the first portion along the first direction ranges from 1 mm to 2 mm;

[0043] And / or, the number of the through holes is two, and the two through holes are arranged at intervals along a second direction, and the second direction is perpendicular to the first direction;

[0044] and / or, in the first state, a dimension of the first portion along a second direction ranges from 2 mm to 4 mm, the second direction being perpendicular to the first direction;

[0045] and / or, in the first state, a dimension of the first portion along a third direction ranges from 5 mm to 25 mm, the third direction being perpendicular to the first direction;

[0046] and / or, in the first state, a dimension of the second portion along the first direction ranges from 1 mm to 3 mm;

[0047] and / or, in the first state, a dimension of the second portion along a second direction ranges from 10 mm to 25 mm, the second direction being perpendicular to the first direction;

[0048] And / or, a dimension of the second portion along a third direction ranges from 10 mm to 25 mm, and the third direction is perpendicular to the first direction.

[0049] In one embodiment, in the first state, the distance between the hole wall of the through hole and the corresponding lead wire is less than or equal to 2 mm;

[0050] and / or, in the first state, a dimension of the first portion along the third direction is smaller than a dimension of the second portion along the third direction, and the first portion is disposed near a center of the second portion along the third direction, the third direction being perpendicular to the first direction;

[0051] And / or, the number of the through holes is two, and the two through holes are located on both sides of the first part.

[0052] In one embodiment, the material of the sealing element includes butyl rubber.

[0053] In a third aspect, an embodiment of the present application provides a method for preparing a photovoltaic module, which is used to prepare the photovoltaic module of the first aspect, comprising:

[0054] providing seals and laminations;

[0055] laminating the sealant and the laminate to form a photovoltaic module;

[0056] Before the seal and the laminate are laminated, the line connecting the inlet end of the seal and the outlet end of the seal is along the first direction; after the seal and the laminate are laminated, the line connecting the inlet end of the seal and the outlet end of the seal intersects with the first direction.

[0057] The preparation method of the photovoltaic module provided in the embodiment of the present application can seal the lead holes of the laminate through the sealing member to improve the waterproof performance of the lead holes, alleviate the phenomenon of water vapor penetrating into the interior of the photovoltaic module through the lead holes, reduce the erosion of water vapor on the battery string layer, improve the performance of the battery string layer, reduce the adverse effects of water vapor on the efficiency and service life of the photovoltaic module, and prevent water vapor from causing failure of the photovoltaic module.

[0058] In one embodiment, before laminating the seal and the laminate, the process includes:

[0059] The first portion of the seal has a dimension in the range of 1 mm to 2 mm along the first direction;

[0060] and / or, the first portion of the seal has a dimension in the second direction ranging from 2 mm to 4 mm;

[0061] and / or, the first portion of the seal has a dimension in the third direction ranging from 5 mm to 25 mm;

[0062] and / or, a dimension of the second portion of the seal along the first direction ranges from 1 mm to 3 mm;

[0063] and / or, the second portion of the seal has a dimension in the second direction ranging from 10 mm to 25 mm;

[0064] and / or, the second portion of the seal has a dimension in the third direction ranging from 10 mm to 25 mm;

[0065] And / or, a distance between a hole wall of the through hole of the sealing member and a corresponding lead-out line of the laminate is less than or equal to 2 mm.

[0066] In one embodiment, after laminating the seal and the laminate, the method further comprises:

[0067] The sealant fills the lead holes of the laminate;

[0068] and / or, the main body of the seal has a dimension in the first direction ranging from 1 mm to 2 mm;

[0069] and / or, a dimension of the main body of the sealing member along the second direction is less than or equal to 35 mm;

[0070] And / or, a dimension of the main body of the seal along the third direction is less than or equal to 28 mm. BRIEF DESCRIPTION OF THE DRAWINGS

[0071] Figure 1 A cross-sectional view of a photovoltaic module provided in an embodiment of the present application.

[0072] Figure 2 A top view of a photovoltaic module provided in an embodiment of the present application.

[0073] Figure 3 A schematic diagram of the structure of a photovoltaic module provided in an embodiment of the present application.

[0074] Figure 4 Another top view of the photovoltaic assembly provided in an embodiment of the present application.

[0075] Figure 5 A bottom view of the photovoltaic assembly provided in an embodiment of the present application.

[0076] Figure 6 A cross-sectional view of a seal and a laminate provided in an embodiment of the present application before lamination.

[0077] Figure 7 This is a schematic structural diagram of the sealing member and the laminate provided in an embodiment of the present application before lamination.

[0078] Figure 8 for Figure 6 A partial enlarged schematic diagram.

[0079] Figure 9 for Figure 6 Another partially enlarged schematic diagram.

[0080] Figure 10 This is a schematic structural diagram of the sealing member provided in an embodiment of the present application before lamination.

[0081] Figure 11 Another structural schematic diagram of the sealing member provided in an embodiment of the present application before lamination.

[0082] Figure 12 This is a structural diagram of the sealing member and the laminate before lamination, with the dimensions L1 and L2 of the sealing member being too large.

[0083] Figure 13 This is another structural schematic diagram in which the sealing member and the laminate are before lamination, and the dimensions L1 and L2 of the sealing member are too large.

[0084] Figure 14 for Figure 12 Cross-sectional view of a photovoltaic module formed after lamination of a sealant and a laminate.

[0085] Figure 15 for Figure 12 A top view of a photovoltaic module formed after lamination of the seal and laminate.

[0086] Figure 16 for Figure 12 Schematic diagram of the structure after the sealing member and the laminate are laminated and connected to the junction box.

[0087] Figure 17 for Figure 12 A top view of the seal and laminate after lamination and connection to the junction box.

[0088] Figure 18 for Figure 12 Bottom view of the seal and laminate after lamination and connection to the junction box.

[0089] Figure 19 This is a structural diagram of the seal and the laminate before lamination, with the size L1, size L2 and thickness of the seal being too small.

[0090] Figure 20 This is another structural diagram in which the seal and the laminate are before lamination, and the size L1, size L2 and thickness of the seal are too small.

[0091] Figure 21 for Figure 19 Cross-sectional view of a photovoltaic module formed after lamination of a sealant and a laminate.

[0092] Figure 22 for Figure 19 A top view of a photovoltaic module formed after lamination of the seal and laminate.

[0093] Figure 23 for Figure 19 Schematic diagram of the structure after the sealing member and the laminate are laminated and connected to the junction box.

[0094] Figure 24 for Figure 19 A top view of the seal and laminate after lamination and connection to the junction box.

[0095] Figure 25 for Figure 19 Bottom view of the seal and laminate after lamination and connection to the junction box.

[0096] Figure 26 This is a structural schematic diagram of the sealing member and the laminate before lamination, with the thickness of the sealing member being too large.

[0097] Figure 27 This is another structural schematic diagram in which the sealing member and the laminate are before lamination and the thickness of the sealing member is too large.

[0098] Figure 28 for Figure 26 Cross-sectional view of a photovoltaic module formed after lamination of a sealant and a laminate.

[0099] Figure 29 for Figure 26 A top view of a photovoltaic module formed after lamination of the seal and laminate.

[0100] Figure 30 for Figure 26 Schematic diagram of the structure after the sealing member and the laminate are laminated and connected to the junction box.

[0101] Figure 31 for Figure 26 A top view of the seal and laminate after lamination and connection to the junction box.

[0102] Figure 32 for Figure 26 Bottom view of the seal and laminate after lamination and connection to the junction box.

[0103] Description of reference numerals:

[0104] 10. Photovoltaic module; 100. Sealing member; 110. First portion; 120. Second portion; 131. Through hole; 1311. Inlet terminal; 1312. Outlet terminal; 141. Sealing portion; 142. Main body; 200. Laminate; 201. First packaging member; 202. Second packaging member; 201a. Lead hole; 210. First substrate; 211. First sub-lead hole; 220. Second substrate; 230. Cell string layer; 240. Lead wire; 251. First packaging glue; 2512. Second sub-lead hole; 252. Second packaging glue; 310. Junction box; 320. Adhesive layer. DETAILED DESCRIPTION

[0105] To make the above-mentioned objects, features, and advantages of the present application more clearly understood, the specific embodiments of the present application are described in detail below with reference to the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways than those described herein, and those skilled in the art can make similar improvements without violating the scope of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0106] In the description of this application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0107] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include at least one of such features. In the description of this application, if the term "plurality" appears, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0108] In this application, unless otherwise specified or limited, the terms "mounted," "connected," "connected," "fixed," etc., should be interpreted broadly. For example, these terms may refer to fixed connections, removable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediary; and internal communication between two components or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0109] In this application, unless otherwise expressly specified or limited, if a first feature is described as being "above" or "below" a second feature, or similar descriptions, this may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is described as being "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is described as being "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0110] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only embodiment.

[0111] In the related art, a photovoltaic module includes a back panel glass and a front panel glass, as well as a battery string located between the back panel glass and the front panel glass. The back panel glass is provided with lead holes for the bus bars connecting the battery strings to pass through. The bus bars pass through the lead holes and are connected to the junction box.

[0112] However, water vapor can easily penetrate into the interior of the photovoltaic module through the lead holes, causing water vapor erosion to the battery string, resulting in a decrease in the performance of the battery string, affecting the efficiency and service life of the photovoltaic module, and even causing the photovoltaic module to fail.

[0113] To solve the above problems, the embodiments of the present application provide a photovoltaic module and a sealant, through which the lead holes can be blocked and sealed to improve the waterproof performance of the lead holes, alleviate the phenomenon of water vapor penetrating into the interior of the photovoltaic module through the lead holes, reduce the erosion of water vapor on the battery string layer, improve the performance of the battery string layer, reduce the adverse effects of water vapor on the efficiency and service life of the photovoltaic module, and prevent water vapor from causing failure of the photovoltaic module.

[0114] The following will be combined Figure 1-Figure 32 The photovoltaic assembly 10 and the sealing member 100 provided in the embodiment of the present application are described.

[0115] The present application embodiment provides a photovoltaic assembly 10, see Figure 1 and Figure 3 The photovoltaic module 10 includes a laminate 200, which includes a first encapsulating member 201 and a second encapsulating member 202 arranged relative to each other along a first direction A, and a cell string layer 230 located between the first encapsulating member 201 and the second encapsulating member 202. The first encapsulating member 201 and the second encapsulating member 202 encapsulate the cell string layer 230 to protect the cell string layer 230. The first direction A may be the thickness direction of the photovoltaic module 10, which is consistent with the thickness direction of the sealing member 100, the first encapsulating member 201, and the second encapsulating member 202.

[0116] It should be noted that, in the photovoltaic module 10 , the laminate 200 and the seal 100 are both in a laminated state.

[0117] Exemplarily, the cell string layer 230 may include a plurality of cells. For example, the cells may include a heterojunction solar cell (HJT), an interdigitated back contact cell (IBC), a heterojunction back contact cell (HBC), or a tunnel oxide passivating contact cell (TOPCON).

[0118] For example, see Figure 1 and Figure 3 The photovoltaic module 10 includes at least two lead wires 240, which are connected to the cell string layer 230. The cell string layer 230 is electrically connected to the external junction box 310 through the lead wires 240. The first package 201 has a lead hole 201a, and the at least two lead wires 240 are each inserted into the lead hole 201a. One end of the lead wire 240 is connected to the cell string layer 230, and the other end of the lead wire 240 is connected to the junction box 310.

[0119] For example, see Figure 1 and Figure 2 , the photovoltaic module 10 includes a seal 100, and the seal 100 is provided with at least one through hole 131. At least two through holes 131 are provided corresponding to at least two lead wires 240, and the lead wires 240 are passed through the corresponding through holes 131. Among them, the seal 100 includes a sealing portion 141 extending into the lead hole 201a and a main body portion 142 located outside the lead hole 201a, and the main body portion 142 is located on the side of the first package 201 away from the second package 202. In this way, the lead hole 201a can be blocked and sealed by the seal 100 to improve the waterproof performance of the lead hole 201a, alleviate the phenomenon of water vapor penetrating into the interior of the photovoltaic module 10 through the lead hole 201a, and reduce the water vapor on the battery string layer 230 ( Figure 3 ) to improve the performance of the cell string layer 230, reduce the adverse effects of moisture on the efficiency and service life of the photovoltaic module 10, and prevent moisture from causing failure of the photovoltaic module 10. In addition, it can also meet the waterproof requirements of the laminate 200, which is highly sensitive to moisture.

[0120] The corresponding arrangement of the lead wire 240 and the through hole 131 may refer to the corresponding arrangement of one lead wire 240 and at least one through hole 131, or the corresponding arrangement of one through hole 131 and at least one lead wire 240. The embodiment of the present application is described by taking the corresponding arrangement of one lead wire 240 and one through hole 131 as an example.

[0121] For example, the photovoltaic module 10 may be provided with at least one seal 100. When the photovoltaic module 10 is provided with one seal 100, all lead wires 240 may be provided through the same seal 100. Alternatively, when there are at least two seals 100, the lead wires 240 and the seals 100 may be provided correspondingly. The present embodiment is described using a single seal 100 as an example.

[0122] For example, there may be at least one lead hole 201 a , which is provided corresponding to the sealing member 100 .

[0123] For example, see Figure 1 The through hole 131 includes an inlet end 1311 located at the sealing portion 141 and an outlet end 1312 located at the main body 142. The line connecting the inlet end 1311 and the outlet end 1312 intersects the first direction A, thereby facilitating the extension of the through hole 131 and the intrusion path of water vapor, thereby facilitating the reduction of water vapor from penetrating into the photovoltaic module 10 through the through hole 131 and reducing the adverse effects of water vapor on the efficiency and service life of the photovoltaic module 10. The inlet end 1311 can be the hole end of the through hole 131 close to the second packaging component 202, and the outlet end 1312 can be the hole end of the through hole 131 away from the second packaging component 202.

[0124] For example, see Figure 1 The through hole 131 extends non-linearly from the line input end 1311 to the line output end 1312. The extension length of the non-linearly extended through hole 131 is longer than the extension length of the linearly extended through hole 131, which is beneficial to extend the invasion path of water vapor, thereby alleviating the phenomenon of water vapor penetrating into the interior of the photovoltaic module 10 through the through hole 131, and reducing the adverse effects of water vapor on the efficiency and service life of the photovoltaic module 10.

[0125] For example, see Figure 1 The through hole 131 has at least one bent section located upstream of the outlet end 1312 along the extension direction of the through hole 131. This means that, along the extension direction of the through hole 131, the bent section of the through hole 131 is located on the side of the outlet end 1312 facing the inlet end 1311. Along the extension direction of the through hole 131, the bent section of the through hole 131 may be located within the sealing portion 141; and / or, along the extension direction of the through hole 131, the bent section of the through hole 131 may be located within the main body 142. The bent section of the through hole 131 can be located in at least one of the sealing part 141 and the main body 142. When the bent section of the through hole 131 is located in both the sealing part 141 and the main body 142 at the same time, it is beneficial to extend the extension length of the bent section of the through hole 131, and thus help to extend the invasion path of water vapor, thereby helping to alleviate the phenomenon of water vapor penetrating into the interior of the photovoltaic module 10 through the through hole 131, and reducing the adverse effects of water vapor on the efficiency and service life of the photovoltaic module 10.

[0126] For example, the number of through holes 131 can be 2, 3, 4, or any number greater than 4. The number of lead wires 240 can be 2, 3, 4, or any number greater than 4. The embodiment of the present application is described by taking the example that the number of through holes 131 and the number of lead wires 240 are both two.

[0127] For example, see Figure 1 and Figure 2 , the two through holes 131 are arranged at intervals along the second direction B, and the second direction B is perpendicular to the first direction A.

[0128] In some embodiments, see Figure 1 and Figure 3 The main body 142 has an exposed surface where the wire outlet 1312 of the through hole 131 is exposed. The exposed surface is the surface of the sealing member 100 facing away from the second package 202, and the exposed surface is non-planar. For example, the exposed surface can be a curved surface that protrudes away from the second package 202. This helps increase the area of ​​the exposed surface, thereby improving the film formation continuity of the adhesive layer 320 subsequently formed on the exposed surface and improving the connection stability between the adhesive layer 320 and the exposed surface.

[0129] In some embodiments, the orthographic projection of the main body 142 on the reference surface has a first contour edge, and the thickness of the main body 142 (i.e., the first direction A) is gradually changed along the direction from the first contour edge to the center of the lead hole 201a. For example, the thickness of the main body 142 gradually increases along the direction from the first contour edge to the center of the lead hole 201a, thereby configuring the exposed surface of the main body 142 as an arc surface, which is beneficial to increasing the area of ​​the exposed surface of the main body 142, thereby facilitating improving the film formation continuity of the adhesive layer 320 subsequently formed on the exposed surface, and improving the connection stability between the adhesive layer 320 and the exposed surface.

[0130] In some embodiments, see Figure 1 and Figure 2 The orthographic projection of the lead hole 201a on the reference plane is within the outline of the orthographic projection of the main body 142 on the reference plane, so that the main body 142 completely covers the lead hole 201a. This helps to alleviate the phenomenon of the first encapsulant 251 and / or the second encapsulant 252 in the laminate 200 overflowing the laminate 200, thereby improving the sealing effect of the sealant 100 on the lead hole 201a. The reference plane is a virtual plane perpendicular to the first direction A.

[0131] In some embodiments, the orthographic projection of the main body 142 on the reference surface has a first contour edge, the orthographic projection of the lead hole 201a on the reference surface has a second contour edge, and the outlet end 1312 of the through hole 131 is located in the first sub-body portion of the main body 142. The orthographic projection of the first sub-body portion on the reference surface is defined by the first contour edge and the second contour edge. This facilitates ensuring that the line connecting the inlet end 1311 and the outlet end 1312 of the through hole 131 intersects the first direction A, thereby extending the extension length of the through hole 131 and the intrusion path of water vapor. This helps alleviate the phenomenon of water vapor infiltrating into the interior of the photovoltaic module 10 through the through hole 131, thereby reducing the adverse effects of water vapor on the efficiency and service life of the photovoltaic module 10.

[0132] Exemplarily, the outline of the orthographic projection of the main body portion 142 on the reference surface is a regular shape; or, the outline of the orthographic projection of the main body portion 142 on the reference surface is an irregular shape.

[0133] In some embodiments, see Figure 1 The sealing portion 141 may fill at least a portion of the lead hole 201a. For example, the sealing portion 141 may completely fill the lead hole 201a, thereby providing a better sealing effect of the sealing portion 141 on the lead hole 201a and facilitating the prevention of the first encapsulant 251 and / or the second encapsulant 252 from overflowing through the lead hole 201a and out of the laminate 200. Of course, the sealing portion 141 may also only fill a portion of the lead hole 201a, as long as the first encapsulant 251 and / or the second encapsulant 252 can be prevented from overflowing through the lead hole 201a and out of the laminate 200 to form a moisture path.

[0134] In some embodiments, the dimension of the main body 142 along the first direction A ranges from 1 mm to 2 mm. This prevents the main body 142 from being too thin, thereby improving the sealing effect of the main body 142 on the lead hole 201a. It also prevents the main body 142 from being too thick, thereby extending the extension length of the lead wires 240 located outside the main body 142, thereby facilitating electrical connection between the lead wires 240 and the junction box 310, thereby reducing adverse effects on the installation and welding of the junction box 310. For example, the dimension of the main body 142 along the first direction A ranges from 1 mm, 1.2 mm, 1.5 mm, 1.8 mm, 2 mm, or any value between 1 mm and 2 mm.

[0135] Exemplarily, the dimension of the main body 142 along the second direction B is less than or equal to 35 mm. This prevents the main body 142 from being too large along the second direction B, and helps prevent the main body 142 from being exposed outside the adhesive layer 320. This helps increase the connection area between the adhesive layer 320 and the first packaging component 201, and helps improve the pull-out force between the junction box 310 and the laminate 200. For example, the dimension of the main body 142 along the second direction B is 20 mm, 25 mm, 30 mm, 35 mm, or any value less than 35 mm.

[0136] For example, the main body 142 is along the third direction C ( Figure 2 ) is less than or equal to 28 mm, thereby preventing the main body 142 from being too large along the third direction C. This helps prevent the main body 142 from being exposed outside the adhesive layer 320, thereby increasing the connection area between the adhesive layer 320 and the first packaging component 201, and improving the pulling force between the junction box 310 and the laminate 200. For example, the dimension of the main body 142 along the third direction C is 20 mm, 22 mm, 25 mm, 28 mm, or any value less than 28 mm.

[0137] Among them, participants Figure 1 and Figure 2 The third direction C can be perpendicular to the first direction A and intersect the second direction B. For example, the third direction C can be perpendicular to the second direction B. The second direction B can be the length direction of the seal 100, and the third direction C can be the width direction of the seal 100. The length, width, and thickness in the embodiments of this application are merely for convenience of description and do not imply any limitation on the dimensions. For example, the width can be greater than, equal to, or less than the length.

[0138] Exemplarily, the orthographic projection of lead hole 201a on the reference plane has a second contour edge, and the dimension from the center of the orthographic projection of lead hole 201a on the reference plane to the second contour edge ranges from 4 mm to 7.5 mm. This prevents the opening of lead hole 201a from being too small, reduces the difficulty of threading lead wire 240 through lead hole 201a, and helps increase the distance between two lead wires 240, reducing the risk of contact and short circuit between the two lead wires 240. Furthermore, it prevents the opening of lead hole 201a from being too large, thereby reducing the difficulty of sealing lead hole 201a. For example, the dimension from the center of the orthographic projection of lead hole 201a on the reference plane to the second contour edge ranges from 4 mm, 5 mm, 6 mm, 7 mm, 7.5 mm, or any value between 4 mm and 7.5 mm.

[0139] In some embodiments, see Figure 1 and Figure 3The first package 201 includes a first substrate 210 and a first encapsulant 251. The first encapsulant 251 is located between the first substrate 210 and the battery string layer 230. The first substrate 210 can protect the battery string layer 230. For example, the first substrate 210 can be a glass substrate. The first encapsulant 251 can be used to connect the first substrate 210 and the battery string layer 230 to prevent gaps from forming between the first substrate 210 and the battery string layer 230.

[0140] For example, see Figure 1 The lead hole 201a may include a first sub-lead hole 211 and a second sub-lead hole 2512 that are interconnected. The first sub-lead hole 211 is provided in the first substrate 210, and the second sub-lead hole 2512 is provided in the first packaging glue 251. The sealing member 100 may completely fill at least one of the first sub-lead hole 211 and the second sub-lead hole 2512, thereby enabling the sealing portion 141 to effectively seal at least one of the first sub-lead hole 211 and the second sub-lead hole 2512, thereby preventing the first packaging glue 251 and / or the second packaging glue 252 from overflowing from the laminate 200 through the lead hole 201a.

[0141] In some embodiments, see Figure 1 and Figure 3 The second package 202 includes a second substrate 220 and a second encapsulant 252. The second encapsulant 252 is located between the second substrate 220 and the battery string layer 230. The second substrate 220 can protect the battery string layer 230. For example, the second substrate 220 can be a glass substrate. The second encapsulant 252 can be used to connect the second substrate 220 and the battery string layer 230, thereby preventing the formation of gaps between the second substrate 220 and the battery string layer 230.

[0142] Illustratively, the waterproof performance of the first encapsulant 251 and / or the second encapsulant 252 is lower than the waterproof performance of the sealant 100, which is beneficial to broadening the material selection range of the first encapsulant 251 and / or the second encapsulant 252 and reducing the cost of the first encapsulant 251 and / or the second encapsulant 252. In addition, it also enables the sealant 100 to have a better sealing effect on the lead hole 201a.

[0143] Illustratively, the material of at least one of the first packaging glue 251 and the second packaging glue 252 includes ethylene-vinyl acetate copolymer (EVA), polyolefin thermoplastic elastomer (POE), or a composite film of EVA and POE (EPE).

[0144] For example, the material of the seal 100 includes butyl rubber, which has excellent airtightness and watertightness, thereby improving the sealing effect of the seal 100 on the lead hole 201a. Specifically, butyl rubber has a higher water vapor barrier performance than EVA, EPE, and POE, and the water vapor barrier performance of butyl rubber is more than 10 times higher than that of POE.

[0145] Among them, the water permeability of EVA is less than or equal to 30g / (m 2 ·24H), the water permeability of EPE is less than or equal to 15g / (m 2 ·24H), the water permeability of POE is less than or equal to 5g / (m 2 ·24H), the water permeability of silica gel is less than or equal to 85g / (m 2 ·24H), the water permeability of butyl rubber is less than or equal to 0.25g / (m 2 · 24 hours). This shows that butyl rubber has high water vapor barrier properties. Taking the water permeability test of butyl rubber as an example, under test conditions of 38°C and 90% RH, the water permeability of butyl rubber with an area of ​​1㎡ and a thickness of 1mm over 24 hours is 0.25g.

[0146] In some embodiments, see Figure 3 and Figure 4 The photovoltaic module 10 also includes a junction box 310 and an adhesive layer 320. The junction box 310 and the adhesive layer 320 are both located on the side of the seal 100 away from the second packaging component 202. The adhesive layer 320 is located between the junction box 310 and the seal 100. The adhesive layer 320 is used to fix the junction box 310 on the laminate 200.

[0147] Exemplarily, the material of the adhesive layer 320 includes silicone.

[0148] For example, see Figure 5 The adhesive layer 320 includes a middle portion and an edge portion, the edge portion is arranged around the outer periphery of the middle portion, the middle portion is connected to the sealing member 100, and the edge portion is connected to the first packaging member 201. The edge portion of the adhesive layer 320 is connected to the first packaging member 201, so that the main body 142 will not be exposed outside the adhesive layer 320, which is beneficial to improve the pulling force between the junction box 310 and the laminate 200, alleviate the phenomenon of the junction box 310 falling off the laminate 200, and also alleviate the phenomenon of water vapor penetrating into the junction box 310 from the interface between the main body 142 and the adhesive layer 320, resulting in a decrease in the waterproof performance and insulation of the junction box 310.

[0149] Exemplarily, the dimension of the edge portion of the adhesive layer 320 along the direction from the middle portion to the edge portion is greater than or equal to 1 mm. This increases the bonding area between the edge portion of the adhesive layer 320 and the first package 201, thereby improving the pull-out strength of the junction box 310 and alleviating the phenomenon of moisture penetrating into the junction box 310 from the interface between the main body 142 and the adhesive layer 320, thereby reducing the waterproof performance and insulation performance of the junction box 310. For example, the dimension of the edge portion along the direction from the middle portion to the edge portion is 1 mm, 1.5 mm, 2 mm, or any value greater than 1 mm.

[0150] For example, the pull-out force between the junction box 310 and the laminate 200 is greater than or equal to 189 N, thereby stably connecting the junction box 310 to the laminate 200 and reducing the risk of the junction box 310 falling off the laminate 200. For example, the pull-out force between the junction box 310 and the laminate 200 is 189 N, 200 N, 210 N, or any value greater than 189 N.

[0151] The photovoltaic module 10 provided in the embodiments of the present application utilizes a reasonable range of dimensions for the sealant 100 and adhesive layer 320. UV illumination reveals no evidence of adhesive penetration (i.e., the first encapsulant 251 and / or the second encapsulant 252 being squeezed out of the sealant 100 through the lead holes 201a after lamination). This prevents the formation of a moisture path between the less waterproof encapsulant (the first encapsulant 251 and / or the second encapsulant 252) within the laminate 200 and the exterior, thereby improving the waterproof performance of the laminate 200. The photovoltaic module 10 can undergo reliability verification tests such as highly accelerated temperature and humidity testing, humidity freeze testing, humidity heat testing, thermal cycling testing, and baking testing. The pullout force between the junction box 310 and the laminate 200 before the test is a first pullout force, and the pullout force between the junction box 310 and the laminate 200 after the test is a second pullout force, with the second pullout force being greater than or equal to 80% of the first pullout force. The second pulling force is relatively large, which can alleviate the phenomenon that the junction box 310 falls off from the laminate 200 .

[0152] It should be noted that the measured shear strength of butyl rubber is 0.6MPA-0.8MPA, while that of silicone rubber is 2.2MPA-3MPA. The measured tensile strength of butyl rubber is 0.4MPa-0.6MPa, while that of silicone rubber is 2.2MPa-2.8MPa. The measured peel force between butyl rubber and glass is 18N / cm-28N / cm, while that between silicone rubber and glass is 80N / cm-120N / cm. Butyl rubber bonds to glass through physical infiltration, while silicone rubber also uses a silane coupling agent, which forms a bond with the silicon-oxygen bonds on the glass surface. Butyl rubber is a thermoplastic material that gradually softens and loses cohesion as temperature rises. Its cohesion is essentially zero above 90°C, while silicone rubber has virtually no effect below 100°C. Therefore, using the edge of the adhesive layer 320 formed of silicone to connect to the first substrate 210 formed of glass can improve the connection stability between the junction box 310 and the laminate 200. By limiting the size of the main body 142 after the sealing member 100 is laminated, the embodiment of the present application can prevent the main body 142 from being too large and affecting the contact between the edge of the adhesive layer 320 and the first substrate 210, thereby avoiding the adverse effect on the pull-out force of the junction box 310.

[0153] The sealing member 100 provided in the embodiment of the present application is described below.

[0154] The embodiment of the present application provides a seal 100 for sealing a lead hole 201a of a laminate 200. Before lamination, the seal 100 is in a first state. After lamination, the seal 100 is in a second state.

[0155] See also Figure 6 and Figure 7When the sealing member 100 is in the first state, the sealing member 100 includes a first portion 110 and a second portion 120 connected to each other. The first portion 110 extends into the lead hole 201a, and the second portion 120 is located outside the lead hole 201a. The sealing member 100 is provided with at least two through holes 131 extending through the second portion 120. The through holes 131 communicate with the lead holes 201a to allow the corresponding lead wires 240 to pass through. The through holes 131 include an inlet end 1311 and an outlet end 1312. Both the inlet end 1311 and the outlet end 1312 are located in the second portion 120. The line connecting the inlet end 1311 and the outlet end 1312 is parallel to the first direction A. Thus, before lamination, the seal 100 has the through hole 131 disposed in the second portion 120 rather than in the first portion 110, which helps reduce the size of the first portion 110 along the second direction B. This reduces the influence of the first portion 110 on the location of the lead wire 240 in the lead hole 201a and reduces the difficulty of the first portion 110 extending into the lead hole 201a. Figure 1 and Figure 6 In the second state, a portion of the second portion 120 extends into the lead hole 201a, and this portion of the second portion 120 and the first portion 110 together form a sealing portion 141 that fills the lead hole 201a. The portion of the second portion 120 located outside the lead hole 201a forms the main body 142. At this time, the inlet end 1311 is located in the sealing portion 141, and the outlet end 1312 is located in the main body 142. The line connecting the inlet end 1311 and the outlet end 1312 intersects the first direction A. In this way, after lamination, the line connecting the inlet end 1311 and the outlet end 1312 of the sealant 100 intersects the first direction A, which helps extend the extension length of the through hole 131, thereby extending the intrusion path of water vapor and reducing the adverse effects of water vapor on the efficiency and service life of the photovoltaic module 10.

[0156] In the related art, the sealant is disposed as a whole between the first packaging glue and the first substrate before lamination. Figure 6 In the embodiment of the present application, the second portion 120 of the sealing member 100 is disposed on the side of the first package 201 away from the second package 202, and the sealing member 100 is squeezed into the lead hole 201a by lamination and heating. This helps prevent the packaging glue (the first package 201 and / or the second packaging glue 252) inside the laminate 200 from penetrating from the lead hole 201a. It can also fundamentally eliminate the lamination bubbles, hidden cracks, and fragmentation problems caused by placing a sealing member inside the laminate in the related art.

[0157] For example, see Figure 6In the first state, the two through holes 131 are arranged at intervals along the second direction B, and the first portion 110 is located between the two through holes 131. In this way, when the seal 100 and the laminate 200 are assembled together, in the lead hole 201a, the first portion 110 can be located between the two lead wires 240, and the two lead wires 240 can be well separated by the first portion 110. There is no seal 100 on the side of the lead wire 240 away from the first portion 110, so that the lead wire 240 can be closer to the hole wall of the lead hole 201a, which is conducive to increasing the distance between the two lead wires 240 located in the lead hole 201a, thereby reducing the risk of the two lead wires 240 being too close and touching after lamination to cause a short circuit.

[0158] See also Figures 12-18 Before lamination (i.e., in the first state), if the size of the second portion 120 along the second direction B and / or the third direction C is too large, for example, if the size is greater than 25 mm, the size of the main body 142 formed after lamination (i.e., in the second state) will exceed the control standard, which may easily cause the photovoltaic module 10 to be laminarly dirty, and the adhesive layer 320 may be unable to cover the main body 142 ( Figure 16 and Figure 17 ), will affect the installation of the junction box 310, and affect the pulling force and waterproof insulation performance of the junction box 310. Figures 19-25 Before lamination, if the size of the second portion 120 along the second direction B and / or the third direction C is too small, for example, the size is less than 10 mm, the main body 142 formed after lamination will not be able to cover the lead hole 201 a, and the amount of glue in the sealant 100 after lamination will be too small to block the packaging glue (taking the first packaging glue 251 as an example), causing the packaging glue to overflow from the lead hole 201 a to the outside of the lead hole 201 a ( Figure 21-Figure 25 ), the packaging glue is connected to the outside world, causing the sealing member 100 to lose its waterproof function.

[0159] Exemplarily, the dimension L1 of the second portion 120 along the second direction B ranges from 10 mm to 25 mm, and / or the dimension L2 of the second portion 120 along the third direction C ranges from 10 mm to 25 mm, thereby helping to prevent the aforementioned problems caused by the dimensions L1 and / or L2 being too large or too small. For example, the dimension L1 of the second portion 120 along the second direction B can be 10 mm, 15 mm, 20 mm, 25 mm, or any value between 10 mm and 25 mm. The dimension L2 of the second portion 120 along the third direction C can be 10 mm, 15 mm, 20 mm, 25 mm, or any value between 10 mm and 25 mm.

[0160] See also Figures 19-25Before lamination, if the size of the second portion 120 along the first direction A is too small, for example, less than 1 mm, the main body 142 formed after lamination will not be able to cover the lead hole 201 a. After lamination, the amount of glue in the sealant 100 will be too small to block the packaging glue, causing the packaging glue to overflow from the lead hole 201 a to the outside of the lead hole 201 a ( Figure 21-25 ), the packaging glue is connected to the outside world, causing the sealing member 100 to lose its waterproof function. Figures 26-32 Before lamination, if the dimension of the second portion 120 along the first direction A is too large, for example, if the dimension is greater than 3 mm, the main body 142 formed after lamination will be too thick, which will cause the extension length of the lead wire 240 exposed outside the seal 100 to be too short, resulting in poor welding or cold welding risks between the junction box 310 and the lead wire 240 ( Figure 31 ), and it is easy to cause the adhesive layer 320 below the junction box 310 to be partially suspended and unable to be bonded to the first package 201 ( Figure 30 and Figure 32 , Figure 32 The portion of the adhesive layer 320 circled by the dotted lines D and E is in a suspended state), thereby affecting the waterproof performance of the junction box 310 and affecting the bonding strength and pulling force between the junction box 310 and the laminate 200.

[0161] For example, see Figure 11 In the first state, the dimension H1 of the second portion 120 along the first direction A ranges from 1 mm to 3 mm, thereby preventing the aforementioned problem caused by the dimension H2 being too large or too small. For example, the dimension H2 of the second portion 120 along the first direction A can be 1 mm, 1.5 mm, 2 mm, 3 mm, or any value between 1 mm and 3 mm.

[0162] For example, in the first state, the dimension H1 of the first portion 110 along the first direction A ranges from 1 mm to 2 mm. This prevents the dimension H1 of the first portion 110 from being too small, which helps improve the sealing effect of the sealing member 100 on the lead hole 201a. In addition, it also prevents the dimension H1 of the first portion 110 from being too large, which helps reduce the manufacturing cost of the sealing member 100. For example, the dimension H1 of the first portion 110 along the first direction A ranges from 1 mm to 2 mm.

[0163] Exemplarily, the sum H3 of the dimensions of the first portion 110 and the second portion 120 along the first direction A is in the range of 2 mm to 5 mm. The principle has been explained and will not be repeated here.

[0164] For example, in the first state, the dimension of the first portion 110 along the second direction B ranges from 2 mm to 4 mm. This prevents the first portion 110 from being too small along the second direction B, thereby improving the sealing effect of the seal 100 on the lead hole 201 a. Furthermore, it prevents the first portion 110 from being too large along the second direction B. This alleviates the pressure exerted by the first portion 110 on the lead wire 240 in the lead hole 201 a and reduces the difficulty of inserting the first portion 110 into the lead hole 201 a. For example, the dimension of the first portion 110 along the second direction B ranges from 2 mm, 2.5 mm, 3 mm, 3.5 mm, 4 mm, or any value between 2 mm and 4 mm.

[0165] For example, in the first state, the dimension of the first portion 110 along the third direction C ranges from 5 mm to 25 mm. This prevents the first portion 110 from being too small along the third direction C, thereby improving the sealing effect of the seal 100 on the lead hole 201 a. Furthermore, this prevents the first portion 110 from being too large along the third direction C, thereby reducing the difficulty of the first portion 110 extending into the lead hole 201 a. For example, the dimension of the first portion 110 along the third direction C ranges from 5 mm, 10 mm, 15 mm, 20 mm, 25 mm, or any value between 5 mm and 25 mm.

[0166] For example, see Figure 8 and Figure 8 In the first state, the distance between the wall of the through hole 131 and the corresponding lead wire 240 is less than or equal to 2 mm. This makes the distance smaller, which facilitates the sealing member 100 to seal the corresponding through hole 131 during lamination, preventing the encapsulant from squeezing out of the through hole 131 and affecting the waterproof performance. For example, the distance between the wall of the through hole 131 and the corresponding lead wire 240 can be 0.5 mm, 1.2 mm, 1.5 mm, 1.8 mm, 2 mm, or any value less than 2 mm.

[0167] In some embodiments, in the first state, the size of the first part 110 along the third direction C is smaller than the size of the second part 120 along the third direction C, and the first part 110 is arranged close to the center of the second part 120 along the third direction C, so that the size of the second part 120 is larger, which is beneficial to the covering of the lead hole 201a by the laminated main body 142. In addition, the size of the first part 110 is smaller, which is beneficial to reducing the difficulty of the first part 110 extending into the lead hole 201a.

[0168] The following describes a method for preparing the photovoltaic module 10 provided in an embodiment of the present application.

[0169] The method for preparing the photovoltaic module 10 provided in the embodiment of the present application is used to prepare the photovoltaic module 10 in the above embodiment, and the preparation method includes:

[0170] S100: Provides seals and laminates.

[0171] See also Figure 6 , provide the sealing member 100 and the laminating member 200 in the above embodiment. At this time, the sealing member 100 and the laminating member 200 are both before lamination, and their setting methods have been explained and will not be repeated here.

[0172] S200: laminating the sealing member and the laminate to form a photovoltaic module.

[0173] See also Figure 1 The seal 100 and the laminate 200 are laminated to form the photovoltaic module 10. Before the seal 100 and the laminate 200 are laminated, the line connecting the inlet end 1311 of the seal 100 and the outlet end 1312 of the seal 100 is along the first direction A. After the seal 100 and the laminate 200 are laminated, the line connecting the inlet end 1311 of the seal 100 and the outlet end 1312 of the seal 100 intersects with the first direction A. Thus, after lamination, the line connecting the inlet end 1311 and the outlet end 1312 of the seal 100 intersects with the first direction A, which helps extend the extension length of the through hole 131, thereby extending the intrusion path of water vapor and reducing the adverse effects of water vapor on the efficiency and service life of the photovoltaic module 10.

[0174] For example, during the lamination process, the sealing member 100 and the laminate 200 may be pressurized, heated, and vacuumed.

[0175] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0176] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, and these modifications and improvements fall within the scope of protection of the present application. Therefore, the scope of protection of the present patent application shall be determined by the appended claims.

Claims

1. A photovoltaic module, characterized in that: include: The laminate comprises a first package, a second package, and a battery string layer located between the first package and the second package, the first package having lead holes for passing at least two lead wires connected to the battery string layer; as well as A sealing member, wherein the sealing member is provided with at least one through hole for the corresponding lead wire to pass through; Wherein, the sealing member comprises a sealing portion extending into the lead-in hole, and a main body portion located outside the lead-in hole; The through hole includes an inlet end located at the sealing portion and an outlet end located at the main body portion, and a line connecting the inlet end and the outlet end intersects with the first direction.

2. The photovoltaic module according to claim 1, characterized in that The through hole extends non-linearly from the line inlet end to the line outlet end.

3. The photovoltaic module according to claim 2, characterized in that The through hole has at least one bending section located upstream of the outlet end along the extension direction of the through hole; Wherein, along the extending direction of the through hole, the bent section is located inside the sealing portion; and / or, Along the extending direction of the through hole, the bent section is located inside the main body.

4. The photovoltaic module according to any one of claims 1 to 3, characterized in that: The main body has an exposed surface for exposing the wire outlet end of the through hole; The exposed surface is configured as a non-planar surface.

5. The photovoltaic module according to any one of claims 1 to 3, characterized in that: The orthographic projection of the lead hole on the reference surface is located within the outline of the orthographic projection of the main body on the reference surface, and the reference surface is a plane perpendicular to the first direction.

6. The photovoltaic module according to claim 5, characterized in that: The orthographic projection of the main body portion on the reference surface has a first contour edge; The dimension of the main body along the first direction changes gradually from the first contour edge to the center of the lead hole.

7. The photovoltaic module according to claim 5, characterized in that The orthographic projection of the main body portion on the reference surface has a first contour edge; The orthographic projection of the lead hole on the reference surface has a second contour edge; The outlet end of the through hole is located at the first sub-main body portion of the main body portion, and the orthographic projection of the first sub-main body portion on the reference surface is determined by the first contour edge and the second contour boundary.

8. The photovoltaic module according to any one of claims 1 to 3, characterized in that: The sealing portion completely fills the lead hole.

9. The photovoltaic module according to claim 8, characterized in that: The first package comprises a first substrate and a first packaging adhesive, wherein the first packaging adhesive is located between the first substrate and the battery string layer; The lead hole includes a first sub-lead hole and a second sub-lead hole connected to each other, the first sub-lead hole is set in the first substrate, and the second sub-lead hole is set in the first packaging glue; the sealing member fills the first sub-lead hole and the second sub-lead hole.

10. The photovoltaic module according to any one of claims 1 to 3, characterized in that: The size of the main body along the first direction ranges from 1 mm to 2 mm; And / or, the number of the through holes is two, and the two through holes are arranged at intervals along a second direction, and the second direction is perpendicular to the first direction; And / or, a dimension of the main body along a second direction is less than or equal to 35 mm, and the second direction is perpendicular to the first direction; And / or, a dimension of the main body along a third direction is less than or equal to 28 mm, and the third direction is perpendicular to the first direction; And / or, the orthographic projection of the lead hole on the reference plane has a second contour edge, and the size range from the center of the orthographic projection of the lead hole on the reference plane to the second contour edge is 4mm-7.5mm; the reference plane is a plane perpendicular to the first direction.

11. The photovoltaic module according to any one of claims 1 to 3, characterized in that: The photovoltaic assembly further includes a junction box and an adhesive layer, wherein the junction box and the adhesive layer are both located on a side of the seal away from the second packaging member, and the adhesive layer is located between the junction box and the seal; The adhesive layer includes a middle portion and an edge portion, the edge portion is arranged around the outer periphery of the middle portion, the middle portion is connected to the sealing component, and the edge portion is connected to the first packaging component.

12. The photovoltaic module according to claim 11, characterized in that: The dimension of the edge portion along the direction from the middle portion to the edge portion is greater than or equal to 1 mm; And / or, the pulling force between the junction box and the laminate is greater than or equal to 189N.

13. A sealant for sealing a lead hole in a laminate, the laminate comprising a first encapsulating member and a second encapsulating member disposed opposite each other along a first direction, and a battery string layer located between the first and second encapsulating members; the first encapsulating member having lead holes for passing at least two lead wires connected to the battery string layer; The sealing member is in a first state before lamination of the laminate and in a second state after lamination of the laminate; In the first state, the seal comprises: A first portion extends into the lead hole; and The second part is located outside the lead hole; The sealing member is provided with at least one through hole penetrating the second portion, the through hole being in communication with the lead hole for allowing the corresponding lead wire to pass through, the through hole including an inlet end and an outlet end, the inlet end and the outlet end being both located in the second portion, and a line connecting the inlet end and the outlet end being parallel to the first direction; In the second state, part of the second part extends into the lead-wire hole, and together with the first part constitutes a sealing part filled in the lead-wire hole, and the part of the second part located outside the lead-wire hole constitutes the main body; the input end is located in the sealing part, the output end is located in the main body, and the line connecting the input end and the output end intersects with the first direction.

14. The seal according to claim 13, wherein: In the first state, a size of the first portion along the first direction ranges from 1 mm to 2 mm; And / or, the number of the through holes is two, and the two through holes are arranged at intervals along a second direction, and the second direction is perpendicular to the first direction; and / or, in the first state, a dimension of the first portion along a second direction ranges from 2 mm to 4 mm, and the second direction is perpendicular to the first direction; and / or, in the first state, a dimension of the first portion along a third direction ranges from 5 mm to 25 mm, and the third direction is perpendicular to the first direction; and / or, in the first state, a size of the second portion along the first direction ranges from 1 mm to 3 mm; and / or, in the first state, a dimension of the second portion along a second direction ranges from 10 mm to 25 mm, and the second direction is perpendicular to the first direction; And / or, a dimension of the second portion along a third direction ranges from 10 mm to 25 mm, and the third direction is perpendicular to the first direction.

15. The seal according to claim 13, wherein In the first state, the distance between the hole wall of the through hole and the corresponding lead wire is less than or equal to 2 mm; and / or, in the first state, a dimension of the first portion along a third direction is smaller than a dimension of the second portion along the third direction, and the first portion is disposed near a center of the second portion along the third direction, the third direction being perpendicular to the first direction; And / or, the number of the through holes is two, and the two through holes are located on both sides of the first part.

16. The sealing element according to any one of claims 13 to 15, characterized in that: The material of the sealing element includes butyl rubber.

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