Photovoltaic module and photovoltaic system

Abstract

The utility model relates to a photovoltaic module and a photovoltaic system. The photovoltaic module comprises a photovoltaic laminated piece, at least two connecting pieces, a bonding layer and a sealing piece, wherein the at least two connecting pieces are arranged on one side of the photovoltaic laminated piece at intervals; each connecting piece is connected with the photovoltaic laminated piece through a bonding layer; the sealing piece is arranged around the bonding layer, the sealing piece is connected with the photovoltaic laminating piece and the connecting piece, a sealed space is defined by the sealing piece, the photovoltaic laminating piece and the connecting piece, and the bonding layer is located in the sealed space. The connecting piece and the photovoltaic laminated piece are bonded and fixed through the bonding layer and the sealing piece, the sealing piece protects the bonding layer from being influenced by weather and illumination, water vapor acid and alkali substances are prevented from permeating and damaging the bonding performance of the bonding layer, the situation that the bonding layer is prone to aging and failure is effectively improved, the use quality of the bonding layer is improved, the service life of the bonding layer is prolonged, and the connection firmness is improved; the probability of falling and breaking of the photovoltaic module is effectively reduced, and the power generation efficiency and the service life of the photovoltaic module are improved.

Description

Technical Field

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

[0002] The frameless photovoltaic module is connected and fixed to the photovoltaic bracket through at least two support beams arranged on the back of the photovoltaic laminate, wherein the support beams are bonded and fixed to the photovoltaic laminate using adhesive materials such as silicone or double-sided adhesive strips. However, the adhesive material is prone to aging and failure, which affects the service life of the photovoltaic module. Utility Model Content

[0003] In view of the above problems, the present application provides a photovoltaic module and a photovoltaic system, which can improve the problem of easy aging and failure of adhesive materials.

[0004] In a first aspect, the present application provides a photovoltaic assembly, comprising: a photovoltaic laminate; at least two connectors spaced apart on one side of the photovoltaic laminate; an adhesive layer, each connector being connected to the photovoltaic laminate via the adhesive layer; and a sealing member disposed around the adhesive layer, the sealing member being connected to both the photovoltaic laminate and the connector, the sealing member, the photovoltaic laminate and the connector forming a sealed space, and the adhesive layer being located within the sealed space.

[0005] In the technical solution of the embodiment of the present application, the connector is bonded and fixed to the photovoltaic laminate by using an adhesive layer and a sealant. The adhesive layer and the sealant protect the glass of the photovoltaic laminate from hard contact with the connector, thereby improving the problem of the connector puncturing the glass. At the same time, the sealant plays a sealing role, protecting the adhesive layer from the influence of climate and light, preventing water vapor and acid-base substances from penetrating and destroying the bonding properties of the adhesive layer, effectively improving the situation where the adhesive layer is prone to aging and failure, and improving the use quality and life of the adhesive layer. The tensile deformation of the adhesive layer and the sealant adapts to the translational shaking of the photovoltaic module, thereby improving the firmness of the connection, reducing the chance of the photovoltaic module falling and breaking, and improving the power generation efficiency and service life of the photovoltaic module.

[0006] In some embodiments, the adhesive layer fills the sealed space, and the sealant is connected to the adhesive layer. In this way, the sealant and the adhesive layer can be bonded together to form a tightly bonded structure with better bonding and weather resistance, thereby increasing the connection strength between the connector and the photovoltaic laminate, improving the firmness of the connection, and extending the service life of the photovoltaic module.

[0007] In some embodiments, the adhesive layer includes a silicone layer, an epoxy resin layer, or an acrylate layer. In this way, the adhesive layer has sufficient strength, can withstand a large load, has good mechanical strength, improves the bonding strength between the connector and the photovoltaic laminate, and is resistant to aging, fatigue, corrosion, peeling, and impact, has stable performance within the expected life, can withstand many stress environments without being damaged during the service life, and improves the firmness of the connection.

[0008] In some embodiments, the sealing member includes an EPDM rubber member, a weather-resistant rubber layer or a butyl rubber layer. In this way, the sealing member has excellent sealing performance and aging resistance such as water resistance, weather resistance, UV resistance, ozone resistance, high and low temperature resistance, etc., and can effectively prevent water vapor, acid and alkali substances from penetrating to destroy the bonding performance of the bonding layer, and protect the bonding layer from the influence of climate and light, thereby effectively improving the aging failure of the bonding layer and improving the use quality and life of the bonding layer.

[0009] In some embodiments, the connector includes a first wall plate and a second wall plate arranged at intervals and a third wall plate connecting the first wall plate and the second wall plate; the first wall plate is connected to one side of the photovoltaic laminate; and the second wall plate is provided with a mounting slot. In this way, the second wall plate can be connected to the mounting structure through the mounting slot, so that the connection position of the connector and the photovoltaic laminate and the connection position of the connector and the mounting structure are arranged in a spatially staggered manner, which can improve the interference between the photovoltaic laminate and the mounting structure, and is simple and convenient to disassemble and assemble. At the same time, the structure is compact, saving materials and space, and no additional drilling is required, simplifying the process and improving construction efficiency.

[0010] In some embodiments, the connector includes two third wall plates spaced apart, and the mounting slot is located between the two third wall plates. This arrangement is conducive to improving the structural strength of the connector, and the force balance at the position of the mounting slot is conducive to improving the connection strength, and the connection between the connector and the mounting structure is more firmly and stably connected.

[0011] In some embodiments, the photovoltaic assembly further includes a limiting fastener, which includes a head and a rod, the rod being inserted into the mounting slot for fixed connection with the mounting structure; the head being in contact with the second wall plate. By using the limiting fastener, the second wall plate is pressed and fixedly connected with the mounting structure, thereby achieving a fastened connection between the connector and the mounting structure, limiting the relative movement between the connector and the support beam, improving the connection firmness and load transfer stability, reducing the probability of the photovoltaic assembly falling and breaking, and thus improving the power generation efficiency and service life of the photovoltaic assembly.

[0012] In some embodiments, the distance between any third wall plate and the inner wall of the mounting slot away from the third wall plate is the limiting distance, and the radial maximum size of the head is greater than the limiting distance. This arrangement can limit the translational shaking of the photovoltaic module, reduce the probability of the limiting fastener slipping out of the mounting slot, improve the firmness of the connection, effectively reduce the probability of the photovoltaic module falling and breaking, and improve the power generation efficiency and service life of the photovoltaic module.

[0013] In some embodiments, the head has a first radial dimension and a second radial dimension, the extension directions of the first radial dimension and the second radial dimension intersect, and the first radial dimension is larger than the second radial dimension. In this way, the volume of the head can be reduced while the maximum radial dimension of the head is larger than the limiting spacing, which facilitates the disassembly and assembly of the limiting fastener and the connector, saves materials, and reduces costs.

[0014] In a second aspect, the present application provides a photovoltaic system, including a photovoltaic support and a photovoltaic module as in any one of the first aspects, wherein the photovoltaic support includes a support beam, and a connector of the photovoltaic module is connected to the support beam. By adopting the photovoltaic module of the above embodiment, the photovoltaic module is not prone to functional failure, and the connection between the photovoltaic module and the photovoltaic support is more firm and stable, which effectively reduces the probability of the photovoltaic module falling and breaking, improves the service life and safety of the photovoltaic module, and improves the overall power generation efficiency of the photovoltaic system.

[0015] In some embodiments, the photovoltaic support further includes an isolator, which is disposed between the connector and the support beam. By using the isolator to insulate the connector from the support beam, the situation where the connector and the support beam are in direct contact with two different metals, which causes an anodic oxidation reaction at the connection position, is alleviated, and the corrosion problem of the connector being corroded and rusted is effectively improved, and the service life of the connector is increased, thereby increasing the power generation efficiency and life of the photovoltaic module.

[0016] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present application. Moreover, the same reference numerals are used throughout the drawings to represent the same components. In the drawings:

[0018] Figure 1 This is a schematic diagram of the structure of photovoltaic modules according to some embodiments of the present application.

[0019] Figure 2 It is a schematic diagram of a partially enlarged structure of a photovoltaic module according to some embodiments of the present application.

[0020] Figure 3 This is a schematic diagram of the structure of a photovoltaic laminate according to some embodiments of the present application.

[0021] Figure 4 This is a schematic diagram of the structure of the photovoltaic components and photovoltaic brackets assembled in some embodiments of the present application.

[0022] Figure 5 for Figure 4 Schematic diagram of the enlarged structure of part A in the middle.

[0023] Figure 6 This is a partial enlarged front view of the photovoltaic component and photovoltaic support assembly structure of some embodiments of the present application.

[0024] Figure 7 This is a partial enlarged left view of the photovoltaic component and photovoltaic support assembly structure of some embodiments of the present application.

[0025] Figure 8 This is a schematic diagram of a photovoltaic assembly and a photovoltaic support assembly structure subjected to a vertical downward load according to some embodiments of the present application.

[0026] Fig. 9 This is a schematic diagram of a photovoltaic assembly and a photovoltaic support assembly structure subjected to a vertical upward load according to some embodiments of the present application.

[0027] Fig.10 This is a schematic diagram of a photovoltaic assembly and a photovoltaic support assembly structure subjected to horizontal loads according to some embodiments of the present application.

[0028] Fig.11 This is a front view of the limiting fastener of some embodiments of the present application.

[0029] Fig.12 A top view of a position limiting fastener according to some embodiments of the present application.

[0030] The reference numerals in the specific implementation manner are as follows:

[0031] 100. Photovoltaic module; 1. Photovoltaic laminate; 11. Front glass; 12. Front encapsulation film; 13. Battery string; 14. Back encapsulation film; 15. Back glass; 2. Connector; 21. First wall plate; 22. Second wall plate; 221. Mounting slot; 23. Third wall plate; 3. Adhesive layer; 4. Sealing member; 5. Positioning fastener; 51. Head; 52. Rod; 521. External thread; 6. Nut;

[0032] 200, photovoltaic support; 201, support beam; 202, isolation member;

[0033] D, the maximum radial dimension of the head; D1, the first radial dimension; D2, the second radial dimension; S, the limit spacing. DETAILED DESCRIPTION

[0034] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0035] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0036] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0037] In the description of the embodiments of the present application, it needs to be understood that 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" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0038] In the description of the embodiments of the present application, the terms "first" and "second" are used only for descriptive purposes to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the embodiments of the present application, "plurality" means at least two, for example, two, three, etc., unless otherwise clearly and specifically defined.

[0039] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, indicating that there may be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0040] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0041] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature 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. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0042] It should be noted that when 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 a central element. An element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and are not intended to be the only implementation method.

[0043] As a green and clean energy, the development of solar power generation is accelerating. Especially with the continuous advancement of technology, the comprehensive power generation cost is rapidly declining, and the share of solar power generation is increasing. Photovoltaic modules are the core units of solar power generation systems. With the continuous development of photovoltaic technology, photovoltaic module products are rapidly developed. Frameless photovoltaic modules mainly refer to photovoltaic modules without frames. Since the aluminum alloy frame is omitted, the corresponding frame installation equipment and glue overflow problems are omitted, and the curing time and cleaning difficulty are saved, so the material, labor, equipment and transportation costs are saved to a great extent.

[0044] When using, photovoltaic modules need to be installed on photovoltaic brackets. Frameless photovoltaic modules are usually installed and fixed with edge clamps, that is, the frameless photovoltaic modules are placed in the middle of the aluminum clamps and then fastened with screws; however, since the strength of the glass edge is only half of the strength of the large surface, after long-term load, stress concentration and glass cracks will appear at the edge of the glass where the clamps are connected, causing the glass of the photovoltaic modules to break, thereby causing the photovoltaic panels to fail; at the same time, when there is an earthquake load, the frameless photovoltaic modules will sway left and right with the earthquake load, and the frameless photovoltaic modules will slip out of the clamps, causing the photovoltaic modules to fall and break, greatly affecting the service life and safety of the photovoltaic modules, and then affecting the overall power generation efficiency of the photovoltaic power station; in addition, the installation method of the clamps is cumbersome, and in the process of tightening with screws, if too much force is applied, the glass will break.

[0045] In order to make the force of the frameless photovoltaic module more uniform and improve the feasibility and stability of the installation of the frameless photovoltaic module, the frameless photovoltaic module can be connected and fixed to the photovoltaic bracket through at least two auxiliary support beams evenly arranged on the back of the photovoltaic laminate; the auxiliary support beams and the photovoltaic laminate are fixed by a bonding layer of silicone or double-sided adhesive strips; the silicone or double-sided adhesive strips here can protect the glass from hard contact with the auxiliary support beams to avoid the auxiliary support beams piercing the glass. However, direct bonding with silicone or double-sided adhesive strips has poor weather resistance. After long-term exposure to the air, affected by temperature, water vapor and light, silicone and double-sided adhesive strips are prone to accelerated aging and failure, affecting the service life of the photovoltaic module, and cannot meet the 25-year service life of the photovoltaic module.

[0046] Based on the above considerations, in order to improve the problem of the adhesive layer being prone to aging and failure, which affects the service life of photovoltaic modules, a frameless photovoltaic module is designed. A sealant is used to protect the adhesive layer from the influence of climate and light, prevent the infiltration of water vapor and acid-base substances to destroy the bonding properties of the adhesive layer, effectively improve the problem of the adhesive layer being prone to aging and failure, and improve the quality and life of the adhesive layer.

[0047] The photovoltaic components disclosed in the embodiments of the present application can be applied to, but not limited to, photovoltaic power generation systems such as solar power stations, and can also be applied to electrical equipment such as electric vehicles, ships or aircraft to form a power supply system for the electrical equipment.

[0048] The photovoltaic system provided in the embodiments of the present application may be, but is not limited to, a land solar power station, an offshore solar power station, a photovoltaic building integrated system, etc.

[0049] According to some embodiments of the present application, referring to Figure 1 and Figure 2 , Figure 1 shows a schematic structural diagram of a photovoltaic assembly in some embodiments of the present application, Figure 2 A partial enlarged structural schematic diagram of a photovoltaic module in some embodiments of the present application is shown. The embodiment of the present application provides a photovoltaic module 100. The photovoltaic module 100 includes a photovoltaic laminate 1, at least two connectors 2, an adhesive layer 3 and a seal 4, at least two connectors 2 are arranged at intervals on one side of the photovoltaic laminate 1; each connector 2 is connected to the photovoltaic laminate 1 through an adhesive layer 3; the seal 4 is arranged around the adhesive layer 3, the seal 4 is connected to the photovoltaic laminate 1 and the connector 2, the seal 4 and the photovoltaic laminate 1 and the connector 2 form a sealed space, and the adhesive layer 3 is located in the sealed space.

[0050] like Figure 1 and Figure 2 As shown in , the X direction is the first direction, the Y direction is the second direction, and the Z direction is the third direction. The first direction, the second direction and the third direction are perpendicular to each other.

[0051] The photovoltaic laminate 1 is a package that connects crystalline silicon solar cells in series and parallel and packages them; the photovoltaic laminate 1 is connected to external wires to become a solar cell module that can be used independently as a photovoltaic power source; the solar cell module absorbs sunlight and uses the photovoltaic effect to directly convert solar radiation energy into the electrical energy output required by the user.

[0052] In some embodiments, reference Figure 3 , Figure 3The schematic diagram of the structure of the photovoltaic laminate in some embodiments of the present application is shown; the thickness direction of the photovoltaic laminate 1 is parallel to the second direction, and the photovoltaic laminate 1 includes a front glass 11, a front encapsulation film 12, a battery string 13, a back encapsulation film 14 and a back glass 15 which are sequentially stacked along the thickness direction. Among them, the front side of the photovoltaic laminate 1 is the side surface of the photovoltaic laminate 1 facing the sunlight, and the back side of the photovoltaic laminate 1 is the side surface of the photovoltaic laminate 1 facing away from the sunlight. The front glass 11 can be a photovoltaic glass with a high light transmittance (light transmittance of more than 92%), such as double-coated glass; the back glass 15 can be transparent or opaque glass; the front glass 11 and the back glass 15 protect the internal packaging materials and solar cells from mechanical damage and external environmental erosion, and are waterproof and insulated. The front encapsulation film 12 and the back encapsulation film 14 can be ethylene-vinyl acetate copolymer (EVA) film, polyolefin elastomer (POE) film or polyvinyl butyral film (PVB) film, etc. The front encapsulation film 12 and the back encapsulation film 14 are used to encapsulate and protect the solar cell to prevent the external environment from affecting the performance of the solar cell, and at the same time bond the glass and the solar cell together, and have a certain bonding strength. The battery string 13 can be one or more; if there are more than one battery string 13, the multiple battery strings 13 can be connected in series, in parallel or in mixed connection, and mixed connection means that the multiple battery strings 13 are both connected in series and in parallel, which can provide higher voltage and capacity; each battery string 13 includes a plurality of solar cells connected in series through connectors such as welding strips, one end of the bus bar is connected to the solar cell, and the other end is connected to the junction box, so as to lead the electric energy generated by the photovoltaic laminate 1 through the junction box and connect it to an external load; the solar cell can be a P-type or N-type solar cell, for example, it can be a PERC (Passivated Emitter and Rear Cell, emitter and back passivation cell) cell, a TOPCon (Thin Oxide Passivated Contact cell, tunneling oxide passivated contact cell) cell, an HJT (Heterojunction Technology, heterojunction) cell, an IBC (Interdigitated backcontact, cross-finger back contact) cell or a perovskite cell, etc.

[0053] At least two connectors 2 are arranged at intervals on one side of the photovoltaic laminate 1, for example, the connector 2 is fixedly connected to the large surface of the back glass 15 of the photovoltaic laminate 1; the number of connectors 2 can be two, three, four, five, or more. In some embodiments, the connector 2 extends longitudinally along a first direction, and the first direction is the length direction of the connector 2; the first direction can be parallel to the length direction or width direction of the photovoltaic laminate 1, and can also be set at an inclined angle relative to the length direction or width direction of the photovoltaic laminate 1. The cross-section of the connector 2 is perpendicular to the length direction of the connector 2; the cross-sectional shape of the connector 2 includes C-shape, cross-shaped, square, rectangular, circular or elliptical, etc., which are not limited here. The material of the connector 2 can be aluminum, steel, stainless steel, composite material or carbon fiber, etc., as long as the connector 2 has sufficient structural strength, which is not limited here. For example, the connector 2 can be an aluminum profile with a C-shaped cross-sectional shape. When the photovoltaic module 100 is used, it is installed and fixed by at least two connectors 2, which can improve the stress concentration and glass breakage problems of the pressing block installation method. The photovoltaic module 100 is subjected to more uniform and dispersed force, thereby improving the feasibility and stability of the installation of the photovoltaic module 100.

[0054] The adhesive layer 3 is an adhesive layer formed by an adhesive having good adhesive properties and can connect two identical or different materials together; the adhesive layer 3 plays a role in connecting objects by surface bonding through adhesion and cohesion. In the embodiment of the present application, each connector 2 is fixedly connected to the photovoltaic laminate 1 through the adhesive layer 3. The adhesive layer 3 can protect the back glass 15, improve the hard contact between the back glass 15 and the connector 2, and improve the problem of the connector 2 piercing the back glass 15. It can also obtain an installation structure with small deflection, light weight, high strength, and simple assembly, and the stress distribution is more uniform, which is conducive to extending the life of the photovoltaic module 100, with simple process, high production efficiency, and low manufacturing cost.

[0055] The seal 4 is a component made of a sealing material with sealing performance, and the seal 4 can be filled between two adjacent bonding surfaces to prevent fluids or solid particles from passing between the two adjacent bonding surfaces. In the embodiment of the present application, the two adjacent bonding surfaces are the surfaces of the photovoltaic laminate 1 and the connector 2; the seal 4 is bonded and fixedly connected to the photovoltaic laminate 1 and the connector 2, and is arranged around the adhesive layer 3. On the one hand, the connection strength between the connector 2 and the photovoltaic laminate 1 can be improved, and on the other hand, the seal 4, the photovoltaic laminate 1 and the connector 2 form a sealed space, and the sealed space completely surrounds the adhesive layer 3, isolating the adhesive layer 3 from the outside world, and can prevent water vapor, acid and alkali substances from penetrating to destroy the adhesive performance of the adhesive layer 3, and protect the adhesive layer 3 from the influence of climate and light, thereby effectively improving the situation that the adhesive layer 3 is easy to age and fail, and improving the use quality and life of the adhesive layer 3. In addition, during the earthquake load, the tensile deformation of the adhesive layer 3 and the seal 4 can adapt to the translational shaking of the photovoltaic assembly 100, play an unloading role, and improve the firmness of the connection.

[0056] In some embodiments, glue can be applied in a dust-free environment with constant temperature and humidity in the factory, and the connector 2 and the photovoltaic laminate 1 can be bonded and fixed through the adhesive layer 3 and the sealant 4, which can effectively improve the quality and efficiency of gluing, save time and labor and material costs, and help achieve the ideal service life of the adhesive layer 3 and the sealant 4, and improve the problem that the quality, efficiency and service life of glue at the construction site will be affected by objective factors such as temperature, humidity, dust, etc.

[0057] The photovoltaic module 100 of the embodiment of the present application uses an adhesive layer 3 and a sealant 4 to bond and fix the connector 2 to the photovoltaic laminate 1. The adhesive layer 3 and the sealant 4 can protect the glass of the photovoltaic laminate 1 from hard contact with the connector 2, thereby improving the problem of the connector 2 puncturing the glass. At the same time, the sealant 4 plays a sealing role, protecting the adhesive layer 3 from the influence of climate and light, preventing water vapor and acid-base substances from penetrating and destroying the bonding performance of the adhesive layer 3, effectively improving the situation that the adhesive layer 3 is prone to aging and failure, and improving the service quality and life of the adhesive layer 3. The photovoltaic module 100 can also be adapted to the translational shaking of the photovoltaic module 100 through the tensile deformation of the adhesive layer 3 and the sealant 4, thereby improving the firmness of the connection, thereby reducing the probability of the photovoltaic module 100 falling and breaking, and improving the power generation efficiency and service life of the photovoltaic module 100.

[0058] According to some embodiments of the present application, the adhesive layer 3 fills the sealing space, and the sealing member 4 is connected to the adhesive layer 3 .

[0059] By setting an adhesive layer 3 to fill the sealed space and connecting the seal 4 to the adhesive layer 3, the seal 4 and the adhesive layer 3 are bonded together to form a tightly structured bonding structure with better bonding and weather resistance, thereby improving the connection strength between the connector 2 and the photovoltaic laminate 1, enhancing the firmness of the connection, and extending the service life of the photovoltaic module 100.

[0060] According to some embodiments of the present application, the adhesive layer 3 includes a silicone layer, an epoxy resin layer or an acrylate layer.

[0061] Silicone is a single-component, translucent paste-like adhesive that cures at room temperature. It has excellent resistance to heat and cold, aging and electrical insulation. It has good bonding properties for most metal and non-metal materials and outstanding weather resistance. In some embodiments, silicone includes silicone resin or silicone rubber used as an adhesive. Silicone resin adhesive is an organic silicone adhesive that is made by mixing silicone resin with inorganic fillers and organic solvents; for example, silicone resin can be polymethylphenylsiloxane, inorganic fillers can be mica, asbestos, etc., and organic solvents can be toluene, xylene, etc.; silicone resin adhesive has excellent high temperature resistance, corrosion resistance, radiation resistance, electrical insulation and weather resistance. Silicone rubber adhesive is an organic silicone adhesive with silicone rubber as the base material, for example, it can be a single-component room temperature vulcanized silicone rubber; after curing, the silicone rubber adhesive has a small shrinkage rate and exhibits automatic bonding properties for a variety of materials such as most metals, glass, and ceramics. It has good bonding properties to materials and excellent heat resistance, cold resistance and weather resistance.

[0062] Epoxy resin glue refers to an adhesive made with epoxy resin as the main body. It can bond various metals and alloys, non-metallic materials such as ceramics, glass, plastics, and can also bond metal to non-metallic materials. Epoxy resin glue is used as a general-purpose glue and structural glue. It is widely used and has excellent physical and mechanical properties, electrical insulation properties, resistance to cold and heat, and weather resistance.

[0063] Acrylate glue refers to an adhesive prepared by copolymerizing an acrylate monomer containing a hydrogen ester group as the main material with an unsaturated olefin monomer and then adding an appropriate amount of additives; for example, the acrylate monomer can be ethyl methacrylate, butyl acrylate or 2-ethylhexyl acrylate, and the unsaturated olefin monomer can be styrene, acrylonitrile or vinyl acetate; acrylate glue dries and forms quickly, has good bonding properties to a variety of materials, and has excellent weather resistance, water resistance, atmospheric aging resistance, and good durability.

[0064] Silicone, epoxy resin and acrylate adhesives have excellent heat resistance, medium resistance, atmospheric aging resistance, vibration fatigue resistance, low creep and high lasting strength, and are suitable for bonding load-bearing structural parts that bear long-term loads and large stresses. By using silicone, epoxy resin adhesive or acrylate adhesive, the adhesive layer 3 has sufficient strength to withstand large loads and has good mechanical strength, thereby improving the bonding strength between the connector 2 and the photovoltaic laminate 1. In addition, the adhesive layer 3 is resistant to aging, fatigue, corrosion, peeling and impact, and has stable performance within the expected lifespan. It can withstand many stress environments without being damaged during the service life, thereby improving the firmness of the connection.

[0065] According to some embodiments of the present application, the sealing member 4 includes an EPDM rubber member, a weather-resistant rubber layer or a butyl rubber layer.

[0066] Ethylene propylene rubber is synthesized with ethylene and propylene as the main raw materials, and has outstanding aging resistance, electrical insulation and ozone resistance. For example, EPDM (Ethylene Propylene Diene Monomer) is a type of EPDM, which is a copolymer of ethylene, propylene and a small amount of non-conjugated dienes, and has excellent aging resistance such as ozone resistance, heat resistance, and weather resistance.

[0067] Weather-resistant glue is a sealant that has undergone artificial accelerated weather aging tests and has no significant changes in various physical and chemical properties; weather-resistant glue has excellent weather aging resistance, excellent high and low temperature resistance, UV resistance, ozone resistance, water resistance, and excellent adhesion. For example, weather-resistant glue can be silicone sealant.

[0068] Butyl rubber is a sealant with isobutylene polymer as the main material; butyl rubber has excellent weather resistance, heat resistance, acid and alkali resistance, excellent air tightness and electrical insulation properties. For example, butyl rubber can be hot melt butyl sealant.

[0069] By adopting EPDM rubber, weather-resistant rubber or butyl rubber, the seal 4 has excellent sealing performance and aging resistance such as water resistance, weather resistance, UV resistance, ozone resistance, high and low temperature resistance, etc., which can effectively prevent water vapor and acid-base substances from penetrating into and destroying the bonding performance of the adhesive layer 3, and protect the adhesive layer 3 from the influence of climate and light, thereby effectively improving the aging and failure of the adhesive layer 3 and improving the service quality and life of the adhesive layer 3.

[0070] According to some embodiments of the present application, referring to Figure 2 , and further refer to Figures 4 to 7 , Figure 4 The schematic diagram of the structure of the photovoltaic assembly and the photovoltaic bracket assembly in some embodiments of the present application is shown. Figure 5 Shows Figure 4 The enlarged structural diagram of the middle A part, Figure 6A partial enlarged front view of the photovoltaic assembly and photovoltaic support assembly structure in some embodiments of the present application is shown. Figure 7 The left partial enlarged view of the photovoltaic assembly and photovoltaic bracket assembly structure in some embodiments of the present application is shown. The connecting member 2 includes a first wall plate 21 and a second wall plate 22 arranged at intervals and a third wall plate 23 connecting the first wall plate 21 and the second wall plate 22; the first wall plate 21 is connected to one side of the photovoltaic laminate 1; and the second wall plate 22 is provided with a mounting slot 221.

[0071] In some embodiments, the connector 2 includes a first wall plate 21 and a second wall plate 22 spaced apart along a second direction, and the first wall plate 21 and the second wall plate 22 are fixedly connected by a third wall plate 23; wherein the first direction and the second direction are perpendicular to each other, and the second direction is the thickness direction of the connector 2. Optionally, the first wall plate 21 and the second wall plate 22 are parallel to each other, and the third wall plate 23 is perpendicular to the first wall plate 21 and the second wall plate 22. The surface of the first wall plate 21 facing away from the second wall plate 22 is bonded and fixedly connected to the back of the photovoltaic laminate 1 through the adhesive layer 3 and the seal 4, so that the connector 2 is fixedly connected to the back of the photovoltaic laminate 1. The second wall plate 22 is provided with a through-mounting slot 221, and the function of the mounting slot 221 is to fix the connector 2 to the mounting structure, so as to install and fix the photovoltaic module 100 to the mounting structure; for example, a fastener such as a bolt is used to penetrate the mounting slot 221, and the second wall plate 22 is fastened to the mounting structure, so that the connector 2 is fixedly connected to the mounting structure. The setting position and shape of the mounting slot 221 on the second wall panel 22 are not limited, as long as the mounting slot 221 is set at the most advantageous force-bearing position; for example, the mounting slot 221 may include a plurality of through holes spaced apart along the first direction on the second wall panel 22, or the mounting slot 221 may also be a through slot continuously opened along the first direction on the second wall panel 22.

[0072] In some embodiments, reference Figures 4 to 7 The mounting structure may be a photovoltaic bracket 200, which is provided with a support beam 201. Fasteners such as T-bolts are passed through the mounting slots 221 and the support beam 201 and are fastened to the nuts 6, thereby fixing the connector 2 to the support beam 201, thereby supporting and installing the photovoltaic assembly 100 on the support beam 201 of the photovoltaic bracket 200.

[0073] By setting a first wall panel 21 and a second wall panel 22 spaced apart from each other, and the first wall panel 21 being bonded and fixedly connected to the photovoltaic laminate 1, the second wall panel 22 can be fixedly connected to the mounting structure via the mounting slot 221 set thereon, so that the connection position between the connector 2 and the photovoltaic laminate 1 and the connection position between the connector 2 and the mounting structure are spatially staggered, which can improve the mutual interference between the photovoltaic laminate 1 and the mounting structure, and is simple and convenient to disassemble and assemble. At the same time, the structure is compact, saving materials and space, and no additional drilling is required, which simplifies the process and improves construction efficiency.

[0074] According to some embodiments of the present application, referring to Figure 2 and Figure 6 The connecting member 2 includes two third wall plates 23 that are spaced apart from each other, and the mounting slot 221 is located between the two third wall plates 23 .

[0075] In some embodiments, the two third wall panels 23 are spaced apart along the third direction, which is the width direction of the connector 2. The two third wall panels 23 are fixedly connected to the first wall panel 21 and the second wall panel 22, which is beneficial to improving the structural strength of the connector 2; the mounting slot 221 is located between the two third wall panels 23, so that the force at the position of the mounting slot 221 is balanced, which is beneficial to improving the connection strength, and the connection between the connector 2 and the mounting structure is more firmly and stably connected.

[0076] According to some embodiments of the present application, referring to Figure 2 and Figures 4 to 7 The photovoltaic assembly 100 also includes a limiting fastener 5, which includes a head 51 and a rod 52, wherein the rod 52 is inserted into the mounting slot 221 to be fixedly connected to the mounting structure; the head 51 abuts against the second wall plate 22.

[0077] The limiting fastener 5 includes a rod 52 and a head 51 fixedly connected to one axial end of the rod 52. The axial direction of the rod 52 is the longitudinal extension direction of the rod 52. The radial dimension of the rod 52 refers to the dimension in the axial direction perpendicular to the rod 52, and the radial dimension of the head 51 refers to the dimension in the axial direction perpendicular to the rod 52. The radial dimension of the head 51 is greater than the radial dimension of the rod 52. The shape of the head 51 refers to the projected contour shape of the head 51 on the cross section perpendicular to the axial direction of the rod 52. The shape of the head 51 can be square, round, elliptical or special-shaped, etc., which is not specifically limited here. The material of the limiting fastener 5 can be steel or stainless steel, or other materials with sufficient strength, which is not limited here.

[0078] Reference Figures 4 to 7During installation, the rod 52 of the limiting fastener 5 is inserted into the installation slot 221 so that the head 51 is located between the two third wall panels 23; the rod 52 is fixedly connected to the installation structure so that the head 51 abuts against the second wall panel 22, thereby pressing and fixing the second wall panel 22 and the installation structure, thereby realizing a fastened connection between the connector 2 and the installation structure.

[0079] Combination Figure 8 As shown, Figure 8 A schematic diagram of the photovoltaic module and photovoltaic bracket assembly structure subjected to a vertical downward load in some embodiments of the present application is shown, and the solid single arrow in the figure indicates the direction of the load; when the load is vertically downward, the load transfer path is: the load acts on the photovoltaic laminate 1, and then is transferred to the adhesive layer 3 and the seal 4, and then to the connector 2, and finally to the support beam 201; the limiting fastener 5 presses and fixes the connector 2 on the support beam 201, limits the relative movement between the connector 2 and the support beam 201, improves the stability of load transfer, and thereby improves the power generation efficiency and service life of the photovoltaic module 100.

[0080] Combination Fig. 9 As shown, Fig. 9 A schematic diagram of the photovoltaic module and photovoltaic bracket assembly structure subjected to vertical upward load in some embodiments of the present application is shown, and the solid single arrow in the figure indicates the direction of the load; when the load is vertically upward, the load transfer path is: the load acts on the photovoltaic laminate 1, and then is transferred to the adhesive layer 3 and the seal 4, and then to the connector 2, and then to the head 51 of the limiting fastener 5, and then to the rod 52 of the limiting fastener 5, and then to the nut 6, and finally to the support beam 201; the limiting fastener 5 simultaneously plays a role in load transfer and presses and fixes the connector 2 on the support beam 201, limits the relative movement between the connector 2 and the support beam 201, improves the connection firmness and load transfer stability, and thereby improves the power generation efficiency and service life of the photovoltaic module 100.

[0081] Combination Fig.10 As shown, Fig.10 A schematic diagram of the photovoltaic module and photovoltaic bracket assembly structure subjected to horizontal load in some embodiments of the present application is shown, and the solid single arrow in the figure indicates the direction of the load; when the load is horizontal from right to left or from left to right, the load transfer path is: the load acts on the photovoltaic laminate 1, and then is transferred to the adhesive layer 3 and the seal 4, and then to the connector 2, and then to the limiting fastener 5, and then to the nut 6, and finally to the support beam 201; the limiting fastener 5 plays a role in load transfer, and at the same time presses and fixes the connector 2 on the support beam 201, which can limit the relative movement between the connector 2 and the support beam 201, thereby improving the firmness of the connection, improving the stability of load transfer, and reducing the probability of the photovoltaic module 100 falling and breaking, thereby improving the power generation efficiency and service life of the photovoltaic module 100.

[0082] In some embodiments, reference Fig.11 , Fig.11 The main view of the limiting fastener in some embodiments of the present application is shown; an external thread 521 is provided on the rod portion 52 of the limiting fastener 5 to threadably connect the rod portion 52 with the nut 6, which can also play an anti-slip role, further reducing the probability of the limiting fastener 5 slipping out of the installation slot 221, and improving the reliability of the connection between the connecting member 2 and the installation structure.

[0083] By adopting the limiting fastener 5, the second wall panel 22 is pressed and fixedly connected to the mounting structure, so as to realize the fastening connection between the connecting member 2 and the mounting structure, limit the relative movement between the connecting member 2 and the support beam 201, improve the connection firmness and load transfer stability, reduce the probability of the photovoltaic module 100 falling and breaking, and thus improve the power generation efficiency and service life of the photovoltaic module 100.

[0084] According to some embodiments of the present application, referring to Figure 2 and Figures 4 to 7 The distance between any third wall plate 23 and the inner wall of the mounting slot 221 away from the third wall plate 23 is the limiting distance S, and the radial maximum dimension D of the head 51 is greater than the limiting distance S.

[0085] Combination Fig.10 As shown, when subjected to horizontal loads such as earthquake loads, relative translational movement may occur between the connector 2 and the support beam 201 along the load direction, causing the head 51 of the limiting fastener 5 to translate relative to the connector 2; if the edge of the head 51 of the limiting fastener 5 moves to the inner wall edge of the mounting slot 221, the head 51 may slip out of the mounting slot 221, causing the photovoltaic component 100 to fall off the photovoltaic bracket 200 and break. The limiting fastener 5 presses and fixes the connector 2 on the support beam 201, and the radial maximum dimension D of the head 51 is greater than the limiting spacing S, that is, the radial maximum dimension D of the head 51 is greater than the spacing between the third wall plate 23 and the inner wall of the mounting slot 221; thus, even if the head 51 of the limiting fastener 5 moves relative to the connector 2, the edge of the head 51 cannot move to the inner wall edge of the mounting slot 221, so that the head 51 cannot slip out of the mounting slot 221, thereby effectively improving the firmness of the connection, improving the load transfer stability, and further improving the power generation efficiency and service life of the photovoltaic module 100. The relative movement between the connector 2 and the support beam 201 can be limited, and the probability of the head 51 of the limiting fastener 5 slipping out of the mounting slot 221 is effectively reduced.

[0086] By setting the radial maximum dimension D of the head 51 of the limiting fastener 5 to be larger than the limiting spacing S, the translational shaking of the photovoltaic component 100 can be limited, and the probability of the limiting fastener 5 slipping out of the installation slot 221 can be effectively reduced, thereby improving the firmness of the connection, effectively reducing the probability of the photovoltaic component 100 falling and breaking, and improving the power generation efficiency and service life of the photovoltaic component 100.

[0087] According to some embodiments of the present application, referring to Fig.12 , Fig.12 A top view of a position limiting fastener in some embodiments of the present application is shown; the head 51 has a first radial dimension D1 and a second radial dimension D2, the extension directions of the first radial dimension D1 and the second radial dimension D2 intersect, and the first radial dimension D1 is greater than the second radial dimension D2.

[0088] In some embodiments, the extension directions of the first radial dimension D1 and the second radial dimension D2 of the head 51 are perpendicular to each other, the first radial dimension D1 is the length dimension of the head 51 , and the second radial dimension D2 is the width dimension of the head 51 .

[0089] By setting the first radial dimension D1 of the head 51 to be larger than the second radial dimension D2, the shape of the head 51 is longitudinally extended, for example, the shape of the head 51 is rectangular, elliptical or special-shaped; in this way, the volume of the head 51 can be reduced while making the maximum radial dimension D of the head 51 larger than the limiting spacing S, thereby facilitating the disassembly and assembly of the limiting fastener 5 and the connecting member 2, saving materials and reducing costs.

[0090] According to some embodiments of the present application, referring to Figure 4 The present application also provides a photovoltaic system, including a photovoltaic bracket 200 and a photovoltaic assembly 100 provided by any of the above embodiments; the photovoltaic bracket 200 includes a support beam 201, and the connecting member 2 of the photovoltaic assembly 100 is connected to the support beam 201 to install the photovoltaic assembly 100 on the photovoltaic bracket 200.

[0091] The photovoltaic system is a power generation system that uses the photovoltaic effect to directly convert solar radiation energy into electrical energy. The photovoltaic system uses photovoltaic modules 100 to generate electricity; the photovoltaic system includes a number of electrically connected photovoltaic modules 100 such as the above-mentioned embodiment, and the several photovoltaic modules 100 are supported and installed on the support beam 201 of the photovoltaic bracket 200; several refers to an integer number of one, two or more. The cross-section of the support beam 201 is perpendicular to the length direction of the support beam 201; the cross-sectional shape of the support beam 201 can be C-shaped, U-shaped, square, circular, I-shaped, H-shaped, etc., which is not limited here. The material of the support beam 201 can be steel or stainless steel, or other materials with sufficient strength, which is not limited here. For example, the support beam 201 can be a steel purlin with a C-shaped cross-sectional shape. The number of support beams 201 is not limited to one, and can also be two, three, or more.

[0092] By adopting the photovoltaic assembly 100 of the above embodiment, the photovoltaic assembly 100 is less likely to fail in function, and the connection between the photovoltaic assembly 100 and the photovoltaic bracket 200 is more firmly and stably connected, which effectively reduces the probability of the photovoltaic assembly 100 falling and breaking, and improves the service life and safety of the photovoltaic assembly 100, thereby improving the overall power generation efficiency of the photovoltaic system.

[0093] According to some embodiments of the present application, referring to Figure 6 and Figure 7 The photovoltaic support 200 also includes an isolation member 202 , which is disposed between the connecting member 2 and the support beam 201 .

[0094] The isolating member 202 is a member with good electrical insulation performance and is disposed between the connecting member 2 and the supporting beam 201 to insulate and isolate the connecting member 2 from the supporting beam 201 .

[0095] By using the isolation member 202 to insulate and isolate the connector 2 from the support beam 201, the anodic oxidation reaction at the connection position caused by the direct contact of the connector 2 and the support beam 201 using two different metals is alleviated, thereby playing an anti-corrosion role, effectively improving the problem of corrosion and rust of the connector 2, and improving the service life of the connector 2, thereby improving the power generation efficiency and life of the photovoltaic module 100.

[0096] According to some embodiments of the present application, the isolation member 202 is an EPDM rubber sheet.

[0097] EPDM rubber has very good aging resistance, good weather resistance, excellent electrical insulation performance, good chemical corrosion resistance, and good impact elasticity. By using EPDM rubber sheets, the spacer 202 has a long service life, good insulation and isolation effect on the connector 2 and the support beam 201, better anti-corrosion effect, effectively improving the corrosion problem of the connector 2 and increasing the service life of the connector 2.

[0098] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A photovoltaic module, characterized in that: include: Photovoltaic laminates; At least two connectors are spaced apart and arranged on one side of the photovoltaic laminate; an adhesive layer, each of the connecting members is connected to the photovoltaic laminate by the adhesive layer; and A sealing member is arranged around the adhesive layer, the sealing member is connected to the photovoltaic laminate and the connecting member, the sealing member, the photovoltaic laminate and the connecting member form a sealed space, and the adhesive layer is located in the sealed space.

2. The photovoltaic module according to claim 1, characterized in that: The adhesive layer fills the sealing space, and the sealing member is connected to the adhesive layer.

3. The photovoltaic module according to claim 1, characterized in that: The adhesive layer includes a silicone layer, an epoxy resin layer or an acrylate layer.

4. The photovoltaic module according to claim 1, characterized in that: The sealing element comprises an EPDM rubber element, a weather-resistant rubber layer or a butyl rubber layer.

5. The photovoltaic module according to any one of claims 1 to 4, characterized in that: The connecting member comprises a first wall plate and a second wall plate which are spaced apart and a third wall plate connecting the first wall plate and the second wall plate; the first wall plate is connected to one side of the photovoltaic laminate; and a mounting slot is arranged on the second wall plate.

6. The photovoltaic module according to claim 5, characterized in that: The connecting member includes two third wall plates that are spaced apart from each other, and the mounting slot is located between the two third wall plates.

7. The photovoltaic module according to claim 6, characterized in that: The photovoltaic assembly further comprises a limiting fastener, which comprises a head and a rod, wherein the rod is passed through the mounting slot to be fixedly connected to the mounting structure; the head abuts against the second wall plate.

8. The photovoltaic module according to claim 7, characterized in that: The distance between any one of the third wall plates and the inner wall of the mounting slot away from the third wall plate is a limiting distance, and the maximum radial dimension of the head is greater than the limiting distance.

9. The photovoltaic module according to claim 7, characterized in that: The head has a first radial dimension and a second radial dimension, the extension directions of the first radial dimension and the second radial dimension intersect, and the first radial dimension is greater than the second radial dimension.

10. A photovoltaic system, characterized in that: It comprises a photovoltaic support and a photovoltaic assembly as claimed in any one of claims 1 to 9, wherein the photovoltaic support comprises a support beam, and a connecting piece of the photovoltaic assembly is connected to the support beam.

11. The photovoltaic system according to claim 10, characterized in that: The photovoltaic support further includes an isolating member, and the isolating member is disposed between the connecting member and the supporting beam.

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