Backboard structure and photovoltaic module

Abstract

The utility model relates to a backboard structure and a photovoltaic module. The back plate structure comprises back plate glass, wherein the back plate glass is provided with a first surface and a second surface which are back to back along a first direction; the conductive part is integrally arranged in the backboard glass in the molten state in the first direction and is integrated with the backboard glass, and the two ends, in the first direction, of the conductive part are partially exposed to the first surface and the second surface respectively. In this way, integrated installation of the conductive parts can be achieved without trepanning operation on the backboard glass. Therefore, the physical strength of the back plate glass can be guaranteed, the bearing capacity of the back plate glass is further guaranteed, meanwhile, gaps caused by opening of the conductive parts and the back plate glass are avoided, the sealing performance of the photovoltaic module is guaranteed, and the service life of the photovoltaic module is prolonged.

Description

Technical Field

[0001] This application relates to the field of photovoltaic technology, and in particular to a backsheet structure and a photovoltaic module. Background Technology

[0002] As an important component of photovoltaic modules, the backsheet glass mainly plays a role in sealing and supporting the photovoltaic modules while allowing light to pass through. The backsheet glass is a backsheet material used in photovoltaic modules, and it is usually made of tempered glass or amorphous silicon glass.

[0003] Since the back glass needs to bear the function of electrical power output, the back glass is usually perforated before the product leaves the warehouse. The back glass adopts a round hole perforation method, and the electrodes pass through the round hole and are exposed on both sides of the back glass, and bear the function of electrical power output through the electrodes.

[0004] When making holes in the backsheet glass, the cutting operation will disrupt the local balance of the backsheet glass to a certain extent, reduce the physical strength of the backsheet glass, and thus reduce the load-bearing capacity of the backsheet glass. At the same time, the area of ​​the hole is much larger than the cross-sectional area of ​​the lead-out electrode, which reduces the sealing strength of the photovoltaic module at that point. Moisture can easily enter the interior of the photovoltaic module through the hole, affecting the service life of the photovoltaic module. Utility Model Content

[0005] Therefore, it is necessary to address the problems of poor strength of the backsheet glass and poor sealing performance of photovoltaic modules caused by the need to open holes in the backsheet glass for electrode installation. This backsheet structure and photovoltaic module can achieve integrated installation of conductive components without opening holes, which can ensure the physical strength of the backsheet glass, ensure the sealing performance of the photovoltaic module, and extend the service life of the photovoltaic module.

[0006] A backplate structure, comprising:

[0007] Back panel glass, the back panel glass having a first surface and a second surface facing away from each other along a first direction; and

[0008] A conductive component is integrated into the molten back glass along a first direction and forms a single piece with the back glass. The two ends of the conductive component along the first direction are respectively partially exposed on the first surface and the second surface.

[0009] In one embodiment of this application, the conductive component includes two conductive elements, which are symmetrically disposed on the back glass along a first direction;

[0010] Each of the conductive elements is electrically connected to a junction box on the first surface and to a bus electrode of a solar cell string on the second surface.

[0011] In one embodiment of this application, each of the conductive elements includes a conductive body, a first conductive portion, and a second conductive portion, wherein the conductive body is disposed in the back glass.

[0012] The first conductive portion is disposed at one end of the conductive body near the first surface and is partially exposed on the first surface;

[0013] The second conductive portion is disposed at one end of the conductive body near the second surface and is partially exposed to the second surface.

[0014] In one embodiment of this application, the conductive component includes at least one of the following features:

[0015] In the first aspect, the first conductive portion and the second conductive portion are bent relative to the conductive body in a direction away from the other conductive element;

[0016] Secondly, the first conductive portion and the second conductive portion are arranged parallel to each other and parallel to the first surface;

[0017] Thirdly, the conductive body, the first conductive part, and the second conductive part are conductive metal sheets or conductive metal wires.

[0018] In one embodiment of this application, the conductive component further includes conductive adhesive, which is disposed on the second conductive portion for electrically connecting the bus electrode.

[0019] In one embodiment of this application, the conductive component further includes an insulating component disposed between the two conductive components;

[0020] The insulating component is insulating adhesive or insulating plastic.

[0021] In one embodiment of this application, the number of conductive components is at least two, and the at least two conductive components are spaced apart on the back glass along a second direction.

[0022] In one embodiment of this application, along the second direction, the back glass has a first edge and a second edge opposite to each other, the distance between the conductive component near the first edge and the first edge is D1, and the distance between the conductive component near the second edge and the second edge is D2, wherein D1=D2;

[0023] And / or, when the number of the conductive components is at least three, the distance between each pair of adjacent conductive components is equal.

[0024] A photovoltaic module includes a cover glass, a string of solar cells, and a backsheet structure as described in any of the above technical solutions;

[0025] The cover glass is disposed on the back panel structure, and the cover glass is sealed to the edge of the back panel structure;

[0026] The solar cell string is located between the cover glass and the back sheet structure, and the solar cell string has a bus electrode that is electrically connected to the conductive components of the back sheet structure.

[0027] In one embodiment of this application, the photovoltaic module further includes a junction box, which is electrically connected to the conductive components of the backplane structure.

[0028] By adopting the above technical solution, this application has at least the following technical effects:

[0029] The backsheet structure and photovoltaic module of this application include a backsheet structure in which conductive components are integrated into the molten backsheet glass. After cooling, the conductive components are located within the backsheet glass and form an integral structure with it. Furthermore, both ends of the conductive components are at least partially exposed on the first and second surfaces of the backsheet glass, respectively, for electrical connection with the solar cell strings and junction box of the photovoltaic module.

[0030] In this way, conductive components can be integrated and installed without the need for drilling holes in the backsheet glass. This ensures the physical strength of the backsheet glass, thereby guaranteeing its load-bearing capacity. At the same time, there are no gaps between the conductive components and the backsheet glass caused by drilling, ensuring the sealing performance of the photovoltaic module and extending its service life. Attached Figure Description

[0031] Figure 1 This is a partial schematic diagram of the backplate structure according to an embodiment of this application.

[0032] Figure 2 for Figure 1 A schematic diagram showing a partial cut of the backplate structure.

[0033] Figure 3 for Figure 2 The diagram shows a partial schematic of the backsheet structure applied to a photovoltaic module.

[0034] Figure 4 for Figure 2 A schematic diagram of the conductive components in the backplate structure shown.

[0035] Wherein: 10, photovoltaic module; 100, backsheet structure; 110, backsheet glass; 111, first surface; 112, second surface; 113, first edge; 114, second edge; 120, conductive component; 121, conductive element; 1211, conductive body; 1212, first conductive part; 1213, second conductive part; 122, conductive adhesive; 123, insulating component; 200, cover glass; 300, busbar electrode. Detailed Implementation

[0036] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0037] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0038] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0039] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0040] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact, or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0041] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, 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 possible implementation.

[0042] Understandably, in photovoltaic modules, the backsheet glass needs to bear the function of electrical power output. Typically, the backsheet glass undergoes perforation before the product leaves the warehouse. This perforation process disrupts the local balance of the backsheet glass, reducing its physical strength and consequently its load-bearing capacity. Furthermore, the area of ​​the perforation is much larger than the cross-sectional area of ​​the lead-out electrodes, reducing the sealing strength of the photovoltaic module at that location. Moisture can easily enter the interior of the photovoltaic module through the perforation, affecting its lifespan.

[0043] Therefore, such as Figures 1 to 3 As shown, this application provides a novel backplate structure 100. Figure 1 This is a partial schematic diagram of a backplate structure 100 according to an embodiment of this application. Figure 2 for Figure 1 A schematic diagram showing a partial cut of the backplate structure 100. Figure 3 for Figure 2 The diagram shows a partial schematic of the backsheet structure 100 applied to the photovoltaic module 10. This backsheet structure 100 is used in the photovoltaic module 10 and serves as the backsheet of the photovoltaic module 10.

[0044] In this application, the backsheet structure 100 allows for the integrated installation of the conductive component 120 without requiring any openings in the backsheet glass 110. This ensures the physical strength of the backsheet glass 110, thereby guaranteeing its load-bearing capacity. Simultaneously, it prevents gaps between the conductive component 120 and the backsheet glass 110 caused by openings, ensuring the sealing performance of the photovoltaic module 10 and extending its service life.

[0045] To better illustrate the specific structure of the backsheet structure 100, the structure of the photovoltaic module 10 will be briefly described first. (See also...) Figures 1 to 3 The photovoltaic module 10 includes a cover glass 200, a solar cell string (not shown), and a backsheet structure 100 as described in this application. The cover glass 200 covers the backsheet structure 100, and the cover glass 200 and the backsheet structure 100 are sealed together at their edges. The solar cell string is disposed between the cover glass 200 and the backsheet structure 100.

[0046] The cover glass 200 and the backsheet structure 100 are located on the front and back sides of the photovoltaic module 10, respectively. The front side refers to the surface on which sunlight enters the photovoltaic module 10, and the back side refers to the surface of the photovoltaic module 10 that is away from sunlight. This application uses... Figures 1 to 3 The direction shown is the reference. Figure 2 and Figure 3 The thickness direction of the backplate structure 100 shown is the first direction. Figure 1 The width direction of the backplate structure 100 shown is the second direction.

[0047] exist Figure 3 In this structure, the backsheet structure 100 is positioned above the cover glass 200, and the edges of the backsheet structure 100 are sealed to the edges of the cover glass 200 to form a sealed cavity. The solar cell strings are housed within the sealed cavity to prevent moisture from the external environment from entering the cavity, thereby preventing moisture from corroding the solar cell strings and extending the performance of the photovoltaic module 10.

[0048] A solar cell string is formed by connecting multiple solar cells in series via solder ribbons or conductive metal wires. The method of connecting solar cells in series is existing technology. This application focuses on the specific structure of the backsheet structure 100 and how the backsheet structure 100 extracts the current generated by the solar cell string. The following text will only provide a detailed explanation of this, and the structure and connection method of the solar cell string will not be repeated.

[0049] The backsheet structure 100 is the component for outputting current in the photovoltaic module 10. The solar cell string has two bus electrodes 300, which are electrically connected to the backsheet structure 100. The current generated after the solar cell string absorbs solar energy can be output through the backsheet structure 100 by the bus electrodes 300.

[0050] The following describes the specific structure of a backplate structure 100 according to an embodiment.

[0051] See Figures 1 to 3 The backplate structure 100 includes a backplate glass 110 and a conductive component 120. The backplate glass 110 has a first surface 111 and a second surface 112 facing each other along a first direction. The conductive component 120 is integrated into the molten backplate glass 110 along the first direction and forms a single piece with the backplate glass 110. At least partially, both ends of the conductive component 120 along the first direction are exposed on the first surface 111 and the second surface 112, respectively.

[0052] The back panel glass 110 is flat and has a certain thickness along a first direction, a certain width along a second direction, and a certain length along a third direction. For example... Figure 1 and Figure 2 As shown, Figure 1 This is a partial schematic diagram of the back panel glass 110. Figure 2 This is a partial schematic diagram of the back glass 110 cut along the second direction.

[0053] The backsheet glass 110 has high light transmittance and weather resistance, which can protect the solar cell string from the influence of the external environment. At the same time, the backsheet glass 110 also helps to increase the absorption of sunlight, improve the conversion efficiency of the photovoltaic module 10, and provide mechanical support and protection for the photovoltaic module 10, ensuring the structural strength of the photovoltaic module 10.

[0054] The back glass 110 has a first surface 111 and a second surface 112 facing away from each other along a first direction. The first surface 111 is the surface of the back glass 110 facing away from the cover glass 200, and the second surface 112 is the surface of the back glass 110 facing the cover glass 200. With the direction of sunlight incidence as a reference, the first surface 111 is the back side of the back glass 110, and the second surface 112 is the front side of the back glass 110, as shown below. Figure 2 and Figure 3 As shown.

[0055] The conductive component 120 is a component that outputs current from the backplate structure 100. The conductive component 120 is disposed in the backplate glass 110 along a first direction, and both ends of the conductive component 120 are partially exposed on the first surface 111 and the second surface 112, respectively. That is, the conductive component 120 extends through both surfaces of the backplate glass 110.

[0056] Thus, after the conductive component 120 extends from the first surface 111, it can be electrically connected to the junction box (not shown) of the photovoltaic module 10. After the conductive component 120 extends from the second surface 112, it can be electrically connected to the bus electrode 300 of the solar cell string. In this way, the current generated by the solar cell string can be transmitted to the junction box through the conductive component 120, and then transmitted to the required equipment such as electrical appliances or storage devices through the junction box.

[0057] To avoid creating openings in the back glass 110, this application integrates the conductive component 120 with the back glass 110. The back glass 110 is in a molten state before molding, and the conductive component 120 is placed within the molten back glass 110 along a first direction. Subsequently, after cooling the conductive component 120 and the molten back glass 110, the back glass 110 solidifies. At this point, the conductive component 120 is located within the back glass 110.

[0058] In other words, during the process of forming the backsheet glass 110 in the molten state, the conductive component 120 is installed into the molten state, so that the backsheet glass 110 and the conductive component 120 form an integral structure. In this way, during the processing of the photovoltaic module 10, it is not necessary to use laser or mechanical cutting to cut the backsheet glass 110 to install the conductive component 120.

[0059] The conductive component 120 is integrated behind the back glass 110, eliminating the need for drilling into the back glass 110. This avoids thermal damage from laser or mechanical cutting affecting the back glass 110, ensures stress balance at various locations on the back glass 110, maximizes the physical strength of the back glass 110, and improves its load-bearing capacity. This, in turn, ensures the overall structural strength of the photovoltaic module 10 and ultimately guarantees its performance.

[0060] Furthermore, the conductive component 120 is disposed after the molten backsheet glass 110. The molten backsheet glass 110 can fill the gaps at the edges of the conductive component 120, so that the integrated conductive component 120 and the backsheet glass 110 are sealed at the connection, ensuring the sealing effect at the connection, preventing moisture from the external environment from entering the photovoltaic module 10 through the opening, thereby preventing moisture from corroding the solar cell string and extending the service life of the photovoltaic module 10.

[0061] Meanwhile, by eliminating the need for drilling operations on the backsheet glass 110, the process of laser or mechanical drilling is eliminated, thereby reducing the complexity of the photovoltaic module 10 lamination process, facilitating the lamination and molding of the photovoltaic module 10, reducing production costs, ensuring the quality of the photovoltaic module 10, and reducing the yield rate.

[0062] In the backsheet structure 100 of the above embodiment, the conductive component 120 can be integrated and installed without the need for drilling holes in the backsheet glass 110. This ensures the physical strength of the backsheet glass 110, thereby guaranteeing its load-bearing capacity. Simultaneously, it prevents gaps between the conductive component 120 and the backsheet glass 110 caused by drilling, ensuring the sealing performance of the photovoltaic module 10 and extending its service life.

[0063] See Figure 1 In one embodiment, the number of conductive components 120 is at least two, and the at least two conductive components 120 are spaced apart along the second direction on the back glass 110. The at least two conductive components 120 are spaced apart along the second direction and can be electrically connected to the bus electrodes 300 at different positions of the solar cell string, thereby realizing the collection of the current generated by the solar cell string.

[0064] See Figure 1 In one embodiment, along the second direction, the back glass 110 has a first edge 113 and a second edge 114 opposite each other, the distance between the conductive member 120 near the first edge 113 and the first edge 113 is D1, and the distance between the conductive member 120 near the second edge 114 and the second edge 114 is D2.

[0065] The back panel glass 110 has a first edge 113 and a second edge 114 in the width direction. At least two conductive components 120 are spaced apart between the first edge 113 and the second edge 114. Furthermore, there is a certain distance between the conductive component 120 near the edge and the first edge 113 and the second edge 114, so that the conductive component 120 can better deliver the current collected by the bus electrode 300 to the junction box.

[0066] Furthermore, D1 = D2. That is, the distance D1 between the conductive component 120 near the first edge 113 and the first edge 113 is equal to the distance D2 between the conductive component 120 near the second edge 114 and the second edge 114. In this way, it can be ensured that the current delivered by the conductive components 120 near the first edge 113 and near the second edge 114 is basically the same.

[0067] See Figure 1 In one embodiment, when the number of conductive components 120 is at least three, the distance between any two adjacent conductive components 120 is equal. The distance between two adjacent conductive components 120 is D3. When the number of conductive components 120 is three or more, the distance between any two adjacent conductive components 120 is also D3. This ensures that the current delivered by each conductive component 120 is basically consistent, and better delivers the current collected by the bus electrode 300 to the junction box.

[0068] See Figure 1 In one embodiment of this application, the number of conductive components 120 is three, and the three conductive components 120 are spaced apart along the second direction. In the three conductive components 120, the distance between any two adjacent groups of conductive components 120 is equal, both being D3. Of course, in other embodiments of this application, the number of conductive components 120 may also be two or other numbers.

[0069] See Figures 2 to 4 In one embodiment, the conductive component 120 includes two conductive elements 121, which are symmetrically disposed on the back glass 110 along a first direction. Each conductive element 121 is electrically connected to a junction box on a first surface 111 and electrically connected to the bus electrode 300 of the solar cell string on a second surface 112. Figure 4 for Figure 2 A schematic diagram of the conductive component 120 in the backplate structure 100 shown.

[0070] The conductive element 121 is the main component for transmitting current. Two conductive elements 121 are symmetrically arranged in the back glass 110 along the second direction to form a conductive element 120. The two conductive elements 121 are equivalent to positive and negative electrodes. The two conductive elements 120 can be respectively connected to the two bus electrodes 300 of the solar cell string at corresponding positions, and the two conductive elements 120 are also connected to the junction box. In this way, the two conductive elements 121, the junction box, the bus electrodes 300, and the solar cell string form a circuit to realize the transmission of current.

[0071] See Figures 2 to 4 In one embodiment, each conductive element 121 includes a conductive body 1211, a first conductive portion 1212, and a second conductive portion 1213. The conductive body 1211 is disposed in the back glass 110. The first conductive portion 1212 is disposed at one end of the conductive body 1211 near the first surface 111 and is partially exposed to the first surface 111. The second conductive portion 1213 is disposed at one end of the conductive body 1211 near the second surface 112 and is partially exposed to the second surface 112.

[0072] The conductive body 1211 is disposed in the back glass 110 along the second direction. The first conductive part 1212 and the second conductive part 1213 are disposed at both ends of the conductive body 1211. The first conductive part 1212 is partially located in the back glass 110 and partially exposed on the first surface 111. The second conductive part 1213 is partially located in the back glass 110 and partially exposed on the second surface 112.

[0073] When the photovoltaic module 10 is laminated, the conductive component 120 is electrically connected to the junction box through the first conductive part 1212 and electrically connected to the bus electrode 300 of the solar cell string through the second conductive part 1213. In this way, the current generated by the solar cell string can be accurately delivered to the junction box through the conductive component 120.

[0074] See Figures 2 to 4 In one embodiment, the first conductive portion 1212 and the second conductive portion 1213 are bent relative to the conductive body 1211 in a direction away from the other conductive member 121. That is, the first conductive portions 1212 of the two conductive members 121 extend in opposite directions, and the second conductive portions 1213 of the two conductive members 121 extend in opposite directions.

[0075] This avoids contact between the first conductive parts 1212 and the second conductive parts 1213 of the two conductive parts 121, so that the two conductive parts 121 are not connected, thus preventing short circuits in the photovoltaic module 10 and achieving reliable current transmission.

[0076] See Figures 2 to 4 In one embodiment, the first conductive portion 1212 and the second conductive portion 1213 are arranged in parallel and parallel to the first surface 111. That is, the first conductive portion 1212 and the second conductive portion 1213 extend in a third direction.

[0077] like Figures 2 to 4 As shown, the conductive component 120 is generally arranged in an I-shape. This increases the electrical connection area between the first conductive part 1212 and the junction box, and increases the electrical connection area between the second conductive part 1213 and the bus electrode 300, thereby improving the current transmission efficiency.

[0078] In one embodiment, the conductive body 1211, the first conductive part 1212, and the second conductive part 1213 are an integral structure. That is, the conductive element 121 is formed by bending. This ensures the structural strength of the conductive element 121.

[0079] In one embodiment, the conductive body 1211, the first conductive portion 1212, and the second conductive portion 1213 are conductive metal sheets. That is, the conductive element 121 is made of a conductive metal sheet. Of course, in other embodiments of this application, the conductive body 1211, the first conductive portion 1212, and the second conductive portion 1213 may also be conductive metal wires.

[0080] See Figures 2 to 4 In one embodiment, the conductive component 120 further includes a conductive adhesive 122, which is disposed on the second conductive portion 1213 for electrically connecting the bus electrode 300. The conductive adhesive 122 is disposed on the surface of the second conductive portion 1213 facing the cover glass 200.

[0081] After the photovoltaic module 10 is laminated, the conductive adhesive 122 can bond and connect the bus electrode 300. In this way, the conductive adhesive 122 can establish an electrical connection between the conductive component 121 and the bus electrode 300, and the bus electrode 300 can transport the electrode to the junction box through the conductive adhesive 122 and the conductive component 121.

[0082] Understandably, before the cover glass 200 is placed over the back glass 110, conductive adhesive 122 is applied to the second conductive part 1213. During the lamination of the photovoltaic module 10, the back glass 110 and the cover glass 200 can be heated, so that the conductive adhesive 122 can bond and connect the bus electrode 300 after being heated.

[0083] Furthermore, since the first conductive part 1212 is exposed on the first surface 111, after the back glass 110 and the cover glass 200 are laminated, the first conductive part 1212 is fixed to the junction box by welding. Optionally, the first conductive part 1212 and the junction box are electrically connected by electromagnetic welding.

[0084] See Figures 2 to 4 In one embodiment, the conductive component 120 further includes an insulating component 123 disposed between the two conductive components 121. That is, the two conductive components 121 in a conductive component 120 are insulated from each other. The insulating component 123 is disposed between the two conductive components 121, creating an open circuit between the two conductive components 121, thus preventing current from flowing between them.

[0085] In this embodiment, the insulating element 123 is insulating adhesive. The insulating adhesive is applied between the two conductive elements 121, which can bond and fix the two conductive elements 121, thereby fixing their relative positions and providing insulation. Of course, in other embodiments of this application, the insulating element 123 may also be made of insulating plastic or other materials capable of providing insulation.

[0086] When using the backsheet structure 100 of this application to fabricate a photovoltaic module 10, conductive components 120 are installed in the molten backsheet glass 110. The conductive components 120 can be cooled together with the backsheet glass 110 to form an integral structure. An insulating adhesive is provided between the two conductive elements 121 of the conductive component 120, and conductive adhesive 122 is applied to the surface of the conductive elements 121 facing the cover glass 200.

[0087] After the position of the solar cell string is fixed, the back sheet structure 100 and the cover glass 200 are stacked, and the conductive component 120 is covered with the laminate. The bus electrode 300 is welded through the conductive adhesive 122, thereby forming an electrical ohmic connection with the solar cell string in the photovoltaic module 10.

[0088] After the backsheet glass 110 and cover glass 200 are laminated, they are both put into a laminator for high-temperature and high-pressure curing. Under high temperature and high pressure, the conductive component 120 directly forms a stable circuit with the solar cell string. After lamination, the conductive component 120 is welded to the junction box.

[0089] The backsheet structure 100 of this application integrates a conductive component 120 within a molten backsheet glass 110. After cooling, the conductive component 120 is located within the backsheet glass 110 and forms an integral structure with it. This allows for the integrated installation of the conductive component 120 without requiring openings in the backsheet glass 110. This ensures the physical strength of the backsheet glass 110, thereby guaranteeing its load-bearing capacity. Simultaneously, it prevents gaps between the conductive component 120 and the backsheet glass 110 caused by openings, ensuring the sealing performance of the photovoltaic module 10 and extending its service life.

[0090] See Figures 1 to 4 This application also provides a photovoltaic module 10, which includes a cover glass 200, a solar cell string, and a backsheet structure 100 as described in any of the above embodiments. The cover glass 200 covers the backsheet structure 100, and the cover glass 200 and the backsheet structure 100 are sealed at their edges. The solar cell string is located between the cover glass 200 and the backsheet structure 100, and the solar cell string has a bus electrode 300, which is electrically connected to the conductive component 120 of the backsheet structure 100.

[0091] The photovoltaic module 10 of this application, employing the backsheet structure 100 of the above embodiment, eliminates the need for opening holes in the backsheet glass 110 to integrate and install the conductive component 120. This allows the conductive component 120 to electrically connect to the busbar electrode 300 of the solar cell string, thereby outputting the current generated by the solar cell string. Furthermore, by eliminating the need for opening holes in the backsheet glass 110, the structural strength and performance of the photovoltaic module 10 are ensured, along with its sealing performance, extending its service life.

[0092] In one embodiment, the photovoltaic module 10 further includes a junction box, which is electrically connected to the conductive component 120 of the backsheet structure 100. The junction box is an external current-carrying component of the photovoltaic module 10. After the current generated by the solar cell string is transmitted to the junction box through the bus electrode 300 and the conductive component 120, the current can be transmitted to the required equipment, such as electrical appliances or storage devices, through the junction box.

[0093] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above 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.

[0094] The embodiments described above are merely illustrative of several implementation methods of this application, and 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 those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A backplane structure, characterized by, The backplane glass (110) has a first surface (111) and a second surface (112) facing away along a first direction; and The conductive component (120) is integrated in the backplane glass (110) in a molten state along the first direction and forms an integral with the backplane glass (110), and both ends of the conductive component (120) along the first direction are partially exposed to the first surface (111) and the second surface (112) respectively. The conductive component (120) includes two conductive pieces (121) symmetrically arranged along the first direction in the backplane glass (110); 2. The backplane structure of claim 1, wherein, Each of the conductive pieces (121) is electrically connected to a junction box at the first surface (111) and to a bus electrode (300) of a solar cell string at the second surface (112). Each of the conductive pieces (121) includes a conductive body (1211), a first conductive part (1212), and a second conductive part (1213), and the conductive body (1211) is arranged in the backplane glass (110); 3. The backplane structure of claim 2, wherein, The first conductive part (1212) is arranged at one end of the conductive body (1211) close to the first surface (111) and is partially exposed to the first surface (111); The second conductive part (1213) is arranged at one end of the conductive body (1211) close to the second surface (112) and is partially exposed to the second surface (112). The conductive component (120) includes at least one of the following features:

4. The backplane structure of claim 3, wherein, The first conductive part (1212) and the second conductive part (1213) are bent away from the other conductive piece (121) relative to the conductive body (1211); The first conductive part (1212) and the second conductive part (1213) are arranged in parallel and parallel to the first surface (111); The conductive body (1211), the first conductive part (1212), and the second conductive part (1213) are conductive metal sheets or conductive metal wires. The conductive component (120) further includes a conductive adhesive (122) arranged at the second conductive part (1213) for electrically connecting the bus electrode (300).

5. The backplane structure of claim 3, wherein, The conductive component (120) further includes an insulating piece (123) arranged between the two conductive pieces (121); 6. The backplane structure of claim 2, wherein, The insulating piece (123) is an insulating adhesive or an insulating plastic. The number of the conductive component (120) is at least two, and at least two of the conductive components (120) are arranged in the backplane glass (110) along a second direction.

7. The backsheet structure according to any of claims 1 to 6, characterized in that ​ 8. The backplane structure of claim 7, wherein, In the second direction, the backsheet glass (110) has opposite first and second edges (113, 114), a distance between a conductive member (120) near the first edge (113) and the first edge (113) is D1, and a distance between the conductive member (120) near the second edge (114) and the second edge (114) is D2, wherein D1 = D2. When the number of the conductive members (120) is at least three, a distance between each pair of adjacent conductive members (120) is equal.

9. A photovoltaic module, characterized by The photovoltaic module (10) further comprises a cover sheet glass (200), a solar cell string, and the backsheet structure (100) as claimed in any one of claims 1 to 8. The cover sheet glass (200) covers the backsheet structure (100), and the cover sheet glass (200) is sealingly connected to edges of the backsheet structure (100). The solar cell string is located between the cover sheet glass (200) and the backsheet structure (100), and has a busbar (300) electrically connected to the conductive member (120) of the backsheet structure (100).

10. The photovoltaic module of claim 9, wherein, The photovoltaic module (10) further comprises a junction box electrically connected to the conductive member (120) of the backsheet structure (100).

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