Dual glass photovoltaic module and photovoltaic system

Abstract

The application discloses a double-glass photovoltaic module and a photovoltaic system. The double-glass photovoltaic module comprises a first glass substrate, a first adhesive film layer, a cell string group, a second adhesive film layer and a second glass substrate which are arranged in a stack. The double-glass photovoltaic module further comprises a filling adhesive member which comprises a base, a first boss and a second boss which are connected in sequence along a first direction. The first boss is arranged in a first hole. The first boss is provided with a first lead hole and a second lead hole. The first lead hole penetrates the first boss and the base, and a first bus bar lead wire passes through the first lead hole. The second lead hole penetrates the first boss and the base, and a second bus bar lead wire passes through the second lead hole. The second boss is arranged between the first lead hole and the second lead hole. Compared with the prior art, the reliability of the double-glass photovoltaic module is improved.

Description

Technical Field

[0001] This application relates to the field of photovoltaic module technology, and more specifically, to a double-glass photovoltaic module and photovoltaic system. Background Technology

[0002] With the development of photovoltaic technology, high-efficiency and high-power double-glass photovoltaic modules have been used more and more widely. Double-glass photovoltaic modules mainly consist of back glass, EVA film, battery string, EVA film, and front glass stacked in sequence. The back glass has glass holes for leading out the battery busbar leads. In the subsequent lamination and encapsulation process, the amount of EVA film in the area below the glass hole is low, which means that the amount of EVA film after hot melting cannot completely fill the gap at the glass hole, resulting in localized missing glue bubbles.

[0003] To address the issue of insufficient EVA film coverage in the area below the glass holes, leading to incomplete filling of the gaps and resulting in localized air bubbles after hot melting, a common approach is to place EVA / POE pads at the glass holes. These pads melt during lamination, compensating for the low EVA film coverage in the area below the glass holes and thus mitigating the air bubble problem. However, in this double-glass photovoltaic module structure, holes for battery busbar leads are also present on the EVA film near the backsheet glass. This results in lower EVA film coverage in the area between the leads, causing insufficient coverage to completely fill the gaps during lamination and encapsulation, leading to localized air bubbles. Summary of the Invention

[0004] This application provides a double-glass photovoltaic module and photovoltaic system, which can improve the reliability of the double-glass photovoltaic module by reducing the probability of localized missing glue bubbles appearing in the area between the first busbar lead and the second busbar lead.

[0005] In a first aspect, embodiments of this application provide a double-glass photovoltaic module, including a first glass substrate, a second glass substrate, a battery string, and a filler. Along a first direction, the second glass substrate is disposed on the first glass substrate, and a first hole is provided on the second glass substrate. The battery string is disposed between the first glass substrate and the second glass substrate. A first adhesive film layer is provided between the battery string and the first glass substrate, and a second adhesive film layer is provided between the battery string and the second glass substrate. A first busbar lead and a second busbar lead are provided on the battery string. The filler includes a base, a first boss, and a second boss connected sequentially along the first direction. The first boss is disposed within the first hole, and a first lead hole and a second lead hole are provided on the first boss. The first lead hole passes through the first boss and the base, and the first busbar lead passes through the first lead hole. The second lead hole passes through the first boss and the base, and the second busbar lead passes through the second lead hole. The second boss is disposed between the first lead hole and the second lead hole.

[0006] In the above technical solution, by setting the second protrusion, the gap area between the first busbar lead and the second busbar lead has sufficient adhesive to be fully filled, thereby reducing the probability of local missing adhesive bubbles in the area between the first busbar lead and the second busbar lead, and thus improving the reliability of the double-glass photovoltaic module.

[0007] In some embodiments, the weight of the second boss is G1, which satisfies 0.065g≤G1≤0.075g.

[0008] In the above technical solution, by using 0.065g≤G1≤0.075g, the weight of the second boss hot-melt can fully fill the gap area between the first busbar lead and the second busbar lead.

[0009] In some embodiments, the weight of the second boss is G1, satisfying G1=0.075g.

[0010] In the above technical solution, by using G1=0.075g, the weight of the second boss hot-melt is just enough to fully fill the gap area between the first busbar lead and the second busbar lead.

[0011] In some embodiments, along the first direction, the thickness of the second boss is T1, satisfying T1≤1.5mm.

[0012] In the above technical solution, by ensuring T1≤1.5mm, the thickness of the protruding part of the second boss into the photovoltaic module is reduced, thereby reducing the probability of damage to the battery string caused by the contact between the second boss and the battery string.

[0013] In some embodiments, the second boss is shaped as a cuboid, cube, cylinder, or sphere.

[0014] In the above technical solution, by setting the shape of the second protrusion to be a cuboid, cube, cylinder or sphere, the side of the second protrusion that contacts the internal battery string of the photovoltaic module can be a flat or curved surface, thereby reducing the probability of damage to the battery string caused by the contact between the second protrusion and the battery string.

[0015] In some embodiments, the shape of the first boss matches the shape of the first hole.

[0016] In the above technical solution, by setting the shape of the first boss to match the shape of the first hole, it is easy for the first boss to be assembled into the first hole.

[0017] In some embodiments, along the first direction, the thickness of the first boss is T2 and the thickness of the second glass substrate is T3, satisfying T2≤T3.

[0018] In the above technical solution, by ensuring that T2≤T3, when the first protrusion is assembled into the first hole, the first protrusion will not protrude from the side of the second glass substrate facing the battery string, thereby reducing the probability of the first protrusion damaging the battery string.

[0019] In some embodiments, along the first direction, the thickness of the first glass substrate is T4 and the thickness of the second glass substrate is T3, satisfying T4=T3 and T4≥2.5mm.

[0020] In the above technical solution, by ensuring that T3≥2.5mm and T4≥2.5mm, the thickness of both the first glass substrate and the second glass substrate is greater than or equal to 2.5mm, which enables the first glass substrate and the second glass substrate to be produced with full tempering, thereby improving the surface stress and mechanical strength of the first glass substrate and the second glass substrate.

[0021] In some embodiments, the filling material is butyl rubber.

[0022] In the above technical solution, by using butyl rubber material to make the filling component, the filling component has the characteristics of butyl rubber, thereby effectively reducing the probability of moisture intrusion into the component and reducing the risk of delamination, corrosion or PID (potential-induced degradation).

[0023] Secondly, embodiments of this application provide a photovoltaic system, including the double-glass photovoltaic module provided in any one of the embodiments of the first aspect. Attached Figure Description

[0024] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a structural diagram of a double-glass photovoltaic module provided in some embodiments of this application; Figure 2 Structural diagrams of double-glass photovoltaic modules provided in other embodiments of this application; Figure 3 for Figure 1 Structural diagram of the filling rubber component in the middle; Figure 4 for Figure 3 A bottom view.

[0026] icon: 1-First glass substrate; 2-First adhesive film layer; 3-Battery string group, 31-First busbar lead, 32-Second busbar lead; 4-Second adhesive film layer; 5-Second glass substrate, 51-First hole; 6-Filling component, 61-Base, 62-First boss, 63-Second boss, 64-First lead hole, 65-Second lead hole; X - First direction. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0028] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used in the description of this application is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms "comprising" and "having," and any variations thereof, in the description, claims, and accompanying drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the description, claims, or accompanying drawings of this application are used to distinguish different objects, not to describe a specific order or hierarchy.

[0029] In this application, the reference to "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment that is mutually exclusive with other embodiments.

[0030] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "attachment" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0031] In this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, in this application, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0032] In the embodiments of this application, the same reference numerals denote the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width, and other dimensions of various components in the embodiments of this application shown in the accompanying drawings, as well as the overall thickness, length, width, and other dimensions of the integrated device, are merely illustrative and should not constitute any limitation on this application.

[0033] With the development of photovoltaic technology, high-efficiency and high-power double-glass photovoltaic modules have been used more and more widely. Double-glass photovoltaic modules mainly consist of back glass, EVA film, battery string, EVA film, and front glass stacked in sequence. The back glass has glass holes for leading out the battery busbar leads. In the subsequent lamination and encapsulation process, the amount of EVA film in the area below the glass hole is low, which means that the amount of EVA film after hot melting cannot completely fill the gap at the glass hole, resulting in localized missing glue bubbles.

[0034] To address the issue of insufficient EVA film coverage in the area below the glass holes, leading to incomplete filling of the gaps and resulting in localized air bubbles after hot melting, a common approach is to place EVA / POE pads at the glass holes. These pads melt during lamination, compensating for the low EVA film coverage in the area below the glass holes and thus mitigating the air bubble problem. However, in this double-glass photovoltaic module structure, holes for battery busbar leads are also present on the EVA film near the backsheet glass. This results in lower EVA film coverage in the area between the leads, causing insufficient coverage to completely fill the gaps during lamination and encapsulation, leading to localized air bubbles.

[0035] Based on the above considerations, in order to solve the technical problem that insufficient EVA film in the area between leads leads leads to air bubbles in the gaps between the leads, thus affecting the reliability of double-glass photovoltaic modules, this application provides a double-glass photovoltaic module, including a first glass substrate, a second glass substrate, a battery string, and a filler. Along a first direction, the second glass substrate is disposed on the first glass substrate, and a first hole is provided on the second glass substrate. The battery string is disposed between the first and second glass substrates. A first adhesive film layer is provided between the battery string and the first glass substrate, and a second adhesive film layer is provided between the battery string and the second glass substrate. A first busbar lead and a second busbar lead are provided on the battery string. The filling component includes a base, a first boss, and a second boss connected sequentially along a first direction. The first boss is disposed in a first hole, and a first lead hole and a second lead hole are provided on the first boss. The first lead hole passes through the first boss and the base, and a first busbar lead wire passes through the first lead hole. The second lead hole passes through the first boss and the base, and a second busbar lead wire passes through the second lead hole. The second boss is disposed between the first lead hole and the second lead hole.

[0036] In this double-glass photovoltaic module, a filling component is provided, including a base, a first boss, and a second boss connected sequentially along a first direction. The base facilitates the installation of the first boss into a first hole. A first lead hole and a second lead hole are provided on the first boss, both penetrating the first boss and the base. A first busbar lead passes through the first lead hole, and a second busbar lead passes through the second lead hole. The second boss is positioned between the first and second lead holes, thus placing the second boss in the gap between the first and second busbar leads. This facilitates the lamination and encapsulation process. After the second protrusion is heated and melted, it can be distributed to the gap area between the first busbar lead and the second busbar lead, thereby compensating for the phenomenon that the amount of adhesive in the second adhesive film layer is insufficient to fill the gap between the first busbar lead and the second busbar lead after heating and melting. Thus, by setting the second protrusion, there is enough adhesive in the gap area between the first busbar lead and the second busbar lead to fully fill it, thereby reducing the probability of local missing adhesive bubbles in the area between the first busbar lead and the second busbar lead, and thus improving the reliability of the double-glass photovoltaic module.

[0037] Please refer to Figure 1-4 , Figure 1 This is a structural diagram of a double-glass photovoltaic module provided in some embodiments of this application. Figure 2 This is a structural diagram of a double-glass photovoltaic module provided in other embodiments of this application. Figure 3 for Figure 1 Structural diagram of the filling rubber component in the middle, Figure 4 for Figure 3 The image shows a bottom view. This application provides a double-glass photovoltaic module, including a first glass substrate 1, a second glass substrate 5, a battery string group 3, and a filler 6. Along a first direction X, the second glass substrate 5 is disposed on the first glass substrate 1, and a first hole 51 is provided on the second glass substrate 5. The battery string group 3 is disposed between the first glass substrate 1 and the second glass substrate 5. A first adhesive layer 2 is provided between the battery string group 3 and the first glass substrate 1, and a second adhesive layer 4 is provided between the battery string group 3 and the second glass substrate 5. A first busbar lead 31 and a second busbar lead 32 are provided on the battery string group 3. The filling component 6 includes a base 61, a first boss 62, and a second boss 63 connected sequentially along the first direction X. The first boss 62 is disposed in the first hole 51. The first boss 62 is provided with a first lead hole 64 and a second lead hole 65. The first lead hole 64 passes through the first boss 62 and the base 61, and the first busbar lead 31 passes through the first lead hole 64. The second lead hole 65 passes through the first boss 62 and the base 61, and the second busbar lead 32 passes through the second lead hole 65. The second boss 63 is disposed between the first lead hole 64 and the second lead hole 65.

[0038] The first glass substrate 1 can be float glass or patterned glass, and the second glass substrate 5 can be float glass or patterned glass, etc. The patterned glass can be ultra-clear patterned glass, and the float glass can be ultra-clear processed float glass, etc. Both ultra-clear patterned glass and ultra-clear processed float glass are high-transmittance, low-iron glasses with a light transmittance of over 91% and an iron content of less than 120 ppm. By using ultra-clear patterned glass or ultra-clear processed float glass, double-glass photovoltaic modules can, on the one hand, protect the battery string 3 and increase the lifespan of the photovoltaic modules. On the other hand, the relatively low iron content and higher light transmittance of ultra-clear patterned glass and ultra-clear processed float glass can improve the power generation efficiency of the photovoltaic modules.

[0039] Battery string group 3 can be formed by connecting several battery strings in parallel, and battery string can be formed by connecting several battery cells in series.

[0040] The first encapsulant layer 2 can be uniformly filled between the battery string group 3 and the first glass substrate 1 after being melted under high temperature and pressure, so as to bond the battery string group 3 and the first glass substrate 1 together. This encapsulates and protects the double-glass photovoltaic module, making it difficult for moisture to enter the module and affect the circuit of the battery string group 3. At the same time, it makes the double-glass photovoltaic module less prone to problems such as module delamination during use, thus extending the module's service life. The second encapsulant layer 4 can be uniformly filled between the battery string group 3 and the second glass substrate 5 after being melted under high temperature and pressure, so as to bond the battery string group 3 and the second glass substrate 5 together. This encapsulates and protects the double-glass photovoltaic module, making it difficult for moisture to enter the module and affect the circuit of the battery string group 3. At the same time, it makes the double-glass photovoltaic module less prone to problems such as module delamination during use, thus extending the module's service life.

[0041] The first adhesive layer 2 can be an EVA film or a POE film, etc., and the second adhesive layer 4 can be an EVA film or a POE film, etc. This material can ensure the bonding and fixing effect while having high light transmittance, thereby improving the power generation performance of the double-glass photovoltaic module.

[0042] The length and width of the first glass substrate 1 can be the same as the length and width of the second glass substrate 5, and the length and width of the first adhesive layer 2 can also be the same as the length and width of the second adhesive layer 4, so as to improve the bonding effect between the battery string 3 and the first glass substrate 1 and the second glass substrate 5.

[0043] The filling component 6 includes a base 61, a first boss 62, and a second boss 63 connected sequentially along a first direction. The base 61 and the first boss 62, as well as the first boss 62 and the second boss 63, can be fixedly connected, such as by bonding or integral molding, or they can be detachably connected, such as by snap-fit.

[0044] In this embodiment, the filling component 6 includes a base 61, a first boss 62, and a second boss 63 connected sequentially along a first direction. The base 61 facilitates the installation of the first boss 62 into the first hole 51. The first boss 62 has a first lead hole 64 and a second lead hole 65, both penetrating the first boss 62 and the base 61. The first busbar lead 31 passes through the first lead hole 64, and the second busbar lead 32 passes through the second lead hole 65. The second boss 63 is positioned between the first lead hole 64 and the second lead hole 65, thus placing the second boss 63 in the gap between the first busbar lead 31 and the second busbar lead 32. In the lamination and encapsulation process, after the second protrusion 63 is hot-melted, it can be distributed to the gap area between the first busbar lead 31 and the second busbar lead 32. This compensates for the phenomenon that the amount of adhesive in the second adhesive layer 4 after hot melting is insufficient to fill the gap between the first busbar lead 31 and the second busbar lead 32. Thus, by setting the second protrusion 63, the gap area between the first busbar lead 31 and the second busbar lead 32 has sufficient adhesive to fully fill it, thereby reducing the probability of localized adhesive-deficient bubbles appearing in the area between the first busbar lead 31 and the second busbar lead 32, and thus improving the reliability of the double-glass photovoltaic module.

[0045] Meanwhile, during the lamination and encapsulation process, the first protrusion 62, after being hot-melted, can be distributed into the first hole 51, thereby compensating for the insufficient amount of adhesive in the second encapsulant layer 4 below the first hole 51 to fill the gaps in the first hole 51. This ensures that the first hole 51 has sufficient adhesive for full filling, thus reducing the probability of localized adhesive-deficient air bubbles appearing in the first hole 51. Furthermore, the cooperation between the first protrusion 62 and the second protrusion 63 further improves the reliability of the double-glass photovoltaic module.

[0046] In some embodiments, the weight of the second boss 63 is G1, satisfying 0.065g≤G1≤0.075g.

[0047] The weight of the second protrusion 63 is G1, which can be 0.065g, 0.065g, 0.065g, 0.065g, 0.065g, 0.065g, 0.065g, 0.065g, 0.065g, 0.065g, 0.065g, 0.065g, 0.065g, etc.

[0048] In this embodiment, by using 0.065g≤G1≤0.075g, the weight of the second boss 63 after hot melting can fully fill the gap area between the first busbar lead 31 and the second busbar lead 32.

[0049] In some embodiments, the weight of the second boss 63 is G1, satisfying G1=0.075g.

[0050] In this embodiment, by setting G1=0.075g, the weight of the second boss 63 after hot melting is just enough to fully fill the gap between the first busbar lead 31 and the second busbar lead 32.

[0051] In some embodiments, the thickness of the second boss 63 along the first direction X is T1, satisfying T1≤1.5mm.

[0052] The thickness of the second boss 63 is T1, which can be 1.0mm, 1.1mm, 1.2mm, 1.3mm, 1.4mm, 1.5mm, etc.

[0053] In this embodiment, by setting T1 ≤ 1.5 mm, the thickness of the second protrusion 63 is made to a suitable size, reducing the thickness of the portion of the second protrusion 63 protruding into the photovoltaic module, thereby reducing the probability of damage to the battery string 3 caused by contact between the second protrusion 63 and the battery string 3. This improves the reliability of the double-glass photovoltaic module.

[0054] In some embodiments, the second boss 63 is shaped as a cuboid, cube, cylinder, or sphere.

[0055] In this embodiment, by setting the shape of the second protrusion 63 to be a cuboid, cube, cylinder, or sphere, since the surface of the cuboid, cube, cylinder, or sphere is a plane or a curved surface, the side of the second protrusion 63 that contacts the internal battery string 3 of the photovoltaic module can be a plane or a curved surface, thereby reducing the probability of damage to the battery string 3 caused by the contact between the second protrusion 63 and the battery string 3, and further improving the reliability of the double-glass photovoltaic module.

[0056] In some embodiments, the shape of the first boss 62 matches the shape of the first hole 51.

[0057] In the projection plane perpendicular to the first direction, the shape of the orthographic projection of the first hole 51 can be a circle, a rectangle, etc., and the shape of the orthographic projection of the first boss 62 can also be a circle, a rectangle, etc.

[0058] In an embodiment where the orthographic projection of the first hole 51 is circular, the orthographic projection of the first boss 62 is also circular. The radius of the first hole 51 can be the same as the radius of the first boss 62, or the radius of the first hole 51 can be greater than the radius of the first boss 62.

[0059] In this embodiment, by setting the shape of the first boss 62 to match the shape of the first hole 51, it is easy for the first boss 62 to be assembled into the first hole 51.

[0060] In some embodiments, along the first direction, the thickness of the first boss 62 is T2, and the thickness of the second glass substrate 5 is T3, satisfying T2≤T3.

[0061] In this embodiment, by setting T2≤T3, when the first protrusion 62 is assembled into the first hole 51, the first protrusion 62 will not protrude from the side of the second glass substrate 5 facing the battery string 3, thereby preventing the first protrusion 62 from contacting the battery string 3, thus reducing the probability of the first protrusion 62 damaging the battery string 3 and further improving the reliability of the double-glass photovoltaic module.

[0062] In some embodiments, along the first direction X, the thickness of the first glass substrate 1 is T4, and the thickness of the second glass substrate 5 is T3, satisfying T3≥2.5mm and T4≥2.5mm.

[0063] The thickness T4 of the first glass substrate 1 and the thickness T3 of the second glass substrate 5 can be equal or unequal.

[0064] The thickness of the first glass substrate 1 is T4, which can be 2.5mm, 2.6mm, 2.7mm, 2.8mm, 2.9mm, or 3.0mm.

[0065] The thickness of the second glass substrate 5 is T3, which can be 2.5mm, 2.6mm, 2.7mm, 2.8mm, 2.9mm, or 3.0mm.

[0066] Due to current glass tempering technology, conventional cooling rates cannot achieve full tempering for glass thinner than 2.5mm. Therefore, the surface stress and mechanical strength of the produced glass are limited by the tempering conditions. In this embodiment, by ensuring T3 ≥ 2.5mm and T4 ≥ 2.5mm, the thicknesses of both the first glass substrate 1 and the second glass substrate 5 are greater than or equal to 2.5mm. This allows for full tempering of both substrates, thereby improving their surface stress and mechanical strength. In other words, tempered glass is produced by high temperature and quenching, creating strong compressive stress on the glass surface, thus increasing the glass's mechanical strength several times over.

[0067] In some embodiments, the filler 6 is made of butyl rubber.

[0068] When using double-glass photovoltaic modules in humid environments, moisture can easily seep in through the gaps in the modules, reacting chemically with the surface of the encapsulated cell string 3, as well as the decomposition products of the solder ribbon and encapsulation materials. These chemical reactions not only lead to corrosion and contamination of the surface of the cell string 3, but may also affect the electrical performance of the cell string 3, such as a decrease in insulation resistance and an increase in leakage current, thus seriously affecting the efficiency and lifespan of the photovoltaic modules. Since butyl rubber has extremely low water vapor permeability, in this embodiment, the filler 6 is made of butyl rubber, giving it the characteristics of butyl rubber. This effectively reduces the probability of moisture intrusion into the module, lowering the risk of delamination, corrosion, or PID (potential-induced degradation). Furthermore, after being heated and melted, the butyl rubber tightly fills the first hole 51, forming a uniform sealing layer to prevent air and dust from entering.

[0069] This application provides a photovoltaic system, including the double-glass photovoltaic module provided in any of the above embodiments.

[0070] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0071] The above embodiments are only used to illustrate the technical solutions of this application and are not intended to limit this application. For those skilled in the art, this application can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A double-glass photovoltaic module, characterized in that, include: First glass substrate; A second glass substrate is disposed on the first glass substrate along a first direction, and a first hole is provided on the second glass substrate; A battery string assembly is disposed between a first glass substrate and a second glass substrate. A first adhesive film layer is disposed between the battery string assembly and the first glass substrate, and a second adhesive film layer is disposed between the battery string assembly and the second glass substrate. A first busbar lead and a second busbar lead are disposed on the battery string assembly. A filling component, comprising a base, a first boss, and a second boss connected sequentially along the first direction. The first boss is disposed within the first hole. The first boss has a first lead hole and a second lead hole. The first lead hole passes through the first boss and the base, and the first busbar lead wire passes through the first lead hole. The second lead hole passes through the first boss and the base, and the second busbar lead wire passes through the second lead hole. The second boss is disposed between the first lead hole and the second lead hole.

2. The double-glass photovoltaic module as described in claim 1, characterized in that, The weight of the second boss is G1, which satisfies 0.065g≤G1≤0.075g.

3. The double-glass photovoltaic module as described in claim 2, characterized in that, The weight of the second boss is G1, which satisfies G1=0.075g.

4. The double-glass photovoltaic module as described in claim 1, characterized in that, Along the first direction, the thickness of the second boss is T1, which satisfies T1≤1.5mm.

5. The double-glass photovoltaic module as described in claim 1, characterized in that, The second protrusion is in the shape of a cuboid, cube, cylinder, or sphere.

6. The double-glass photovoltaic module as described in claim 1, characterized in that, The shape of the first boss matches the shape of the first hole.

7. The double-glass photovoltaic module as described in claim 1, characterized in that, Along the first direction, the thickness of the first boss is T2, and the thickness of the second glass substrate is T3, satisfying T2≤T3.

8. The double-glass photovoltaic module according to any one of claims 1-7, characterized in that, Along the first direction, the thickness of the first glass substrate is T4, and the thickness of the second glass substrate is T3, satisfying T4=T3 and T4≥2.5mm.

9. The double-glass photovoltaic module according to any one of claims 1-7, characterized in that, The filling material is butyl rubber.

10. A photovoltaic system, characterized in that, Includes double-glass photovoltaic modules as described in any one of claims 1-9.

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