Photovoltaic module
By adding an insulating reflective layer to the photovoltaic module, the risk of short circuit caused by jumper wire misalignment is solved, thereby improving safety and power generation efficiency, and enhancing appearance consistency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-08
- Publication Date
- 2026-04-10
Smart Images
Figure CN121843253A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the field of photovoltaic technology, and in particular to a photovoltaic module. BACKGROUND
[0002] In the actual operation environment of photovoltaic power stations, photovoltaic modules are exposed to complex outdoor conditions for a long time. Local shading, cell cracking or fragments and other factors can easily induce inter-string current mismatch of the cell string, and further cause local hot spot effect. As a key current conduction and shunt component, the function of the jumper is to parallel the cell string with mismatch risk, balance the current distribution, and effectively suppress the hot spot effect, thereby ensuring the long-term stable operation of the photovoltaic module.
[0003] Generally, the spacing between the jumper and the cell is designed to be small, and electrical insulation is mainly achieved by this spacing. During the lamination process of the photovoltaic module, the encapsulation material (such as EVA or POE film) melts and flows at high temperature, which is easy to impact and drag the jumper, resulting in a shift in its position. In the long-term outdoor use process, the temperature cycle of day and night and seasons causes repeated thermal expansion and cold contraction stress inside the photovoltaic module, and the jumper further produces displacement due to material fatigue and stress concentration. Once the jumper is offset and contacts the cell, a short circuit path will be directly formed, thereby increasing the risk of short circuit of the photovoltaic module, seriously affecting the operation safety and service life of the photovoltaic module.
[0004] Therefore, it is urgent to design a photovoltaic module to solve the above technical problems. SUMMARY
[0005] The purpose of the present application is to provide a photovoltaic module that can reduce the phenomenon of jumper offset, reduce the risk of jumper contacting the cell, and further reduce the risk of short circuit of the photovoltaic module, improve the safety of the photovoltaic module, and prolong the service life.
[0006] To achieve this purpose, the present application adopts the following technical solutions:
[0007] On the one hand, the present application provides a photovoltaic module, comprising:
[0008] a cell string;
[0009] a busbar connected with the solder strip in the cell string;
[0010] a jumper, both ends of the jumper being connected with the busbar; or, one end of the jumper being connected with the busbar, and the other end being connected to a junction box;
[0011] an insulating and light-reflecting layer, the insulating and light-reflecting layer being attached to the light-receiving surface of the busbar and the light-receiving surface of the jumper, and the width of the insulating and light-reflecting layer being greater than the width of the busbar and the width of the jumper covered by the insulating and light-reflecting layer.
[0012] As an optional technical scheme of the photovoltaic module, the insulating light-reflecting layer comprises a light-reflecting layer, an insulating layer and an adhesive layer, the opposite sides of the insulating layer are connected with the light-reflecting layer and the adhesive layer respectively, the side of the adhesive layer away from the insulating layer is adhered with the bus bar or the jumper wire, and the light-reflecting layer faces the light-receiving surface of the photovoltaic module.
[0013] As an optional technical scheme of the photovoltaic module, the light-reflecting layer is provided in one of silver, white and black.
[0014] As an optional technical scheme of the photovoltaic module, the thickness of the insulating light-reflecting layer is not less than 0.08 mm.
[0015] As an optional technical scheme of the photovoltaic module, the width of the insulating light-reflecting layer is provided between 5 mm and 20 mm.
[0016] As an optional technical scheme of the photovoltaic module, at the connection between the bus bar and the jumper wire, the insulating light-reflecting layer on the bus bar and the insulating light-reflecting layer on the jumper wire overlap each other.
[0017] Or, only the insulating light-reflecting layer on the bus bar is provided at the connection between the bus bar and the jumper wire.
[0018] Or, only the insulating light-reflecting layer on the jumper wire is provided at the connection between the bus bar and the jumper wire.
[0019] As an optional technical scheme of the photovoltaic module, the jumper wire is provided between two adjacent cell strings, and the insulating light-reflecting layer on the jumper wire is not in contact with the cell pieces in the two adjacent cell strings.
[0020] As an optional technical scheme of the photovoltaic module, the jumper wire is provided on the back surface of the cell string, the adhesive layer is adhered to the jumper wire, the light-reflecting layer is provided with an insulating point adhesive, the insulating point adhesive is adhered to the back surface of the cell piece in the cell string, so that the jumper wire is fixed and hidden on the back surface of the cell string.
[0021] As an optional technical scheme of the photovoltaic module, the bus bar comprises an end bus bar and a middle bus bar, the end bus bar is provided in the two end regions of the cell string, the middle bus bar is provided in the middle region of the cell string, and the end bus bar and the middle bus bar are both connected with the solder strip in the cell string.
[0022] The jumper wire comprises a first jumper wire and a second jumper wire, one end of the first jumper wire is connected with the end bus bar, the other end of the first jumper wire is connected with the middle bus bar, one end of the second jumper wire is connected with the end bus bar, and the other end of the second jumper wire is connected with the junction box.
[0023] As an alternative technical solution of the photovoltaic module, the end of the intermediate busbar is provided with an L-shaped lead-out wire which is arranged perpendicular to the plane of the photovoltaic module and used for connecting with the junction box.
[0024] The present application has at least the following beneficial effects:
[0025] The present application provides a photovoltaic module, which comprises a cell string, a busbar, a jumper wire and an insulating light-reflecting layer. The busbar is connected with the solder strip in the cell string. The two ends of the jumper wire are connected with the busbar, or one end of the jumper wire is connected with the busbar and the other end is connected with the junction box. The insulating light-reflecting layer is attached to the light-receiving surface of the busbar and the light-receiving surface of the jumper wire, and the width of the insulating light-reflecting layer is greater than the width of the busbar and the width of the jumper wire covered by the insulating light-reflecting layer.
[0026] By adding an independent insulating light-reflecting layer, a physical isolation barrier is first constructed on the surface of the busbar and the jumper wire. Even if the jumper wire or the busbar is shifted, the insulating light-reflecting layer can still effectively prevent direct contact between the jumper wire or the busbar and the cell or the adjacent conductor, reducing the risk of short circuit. Secondly, since the width of the insulating light-reflecting layer is greater than the width of the busbar and the width of the jumper wire covered by the insulating light-reflecting layer, the two side edges of the busbar and the jumper wire are completely wrapped by the insulating light-reflecting layer, avoiding the edge leakage phenomenon caused by edge burrs or uneven flow of packaging materials, and realizing full-wrapping insulation protection of the jumper wire and the busbar.
[0027] At the same time, the insulating light-reflecting layer has light-reflecting properties, which can reflect the light irradiating the busbar area and the jumper wire area to the surface of the cell, so that the originally unused light is absorbed by the cell and converted into electrical energy, making up for the light loss caused by the shielding of the busbar and the jumper wire, and improving the power generation efficiency of the photovoltaic module.
[0028] In addition, the width of the insulating light-reflecting layer in the present application is greater than the width of the busbar and the width of the jumper wire covered by the insulating light-reflecting layer, so that the jumper wire and the busbar are not visible on the front surface of the photovoltaic module, thereby improving the consistency of the appearance of the photovoltaic module. BRIEF DESCRIPTION OF DRAWINGS
[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the description of the embodiments of the present application will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art according to the contents of the embodiments of the present application and the drawings without creative labor.
[0030] Figure 1 is a top view of the photovoltaic module provided by the embodiments of the present application;
[0031] Figure 2 This is a cross-sectional view of the insulating reflective layer provided in the embodiment of the present invention being bonded to a busbar or jumper.
[0032] Figure Labels
[0033] 10. Battery string;
[0034] 20. Busbar; 21. End busbar; 22. Intermediate busbar;
[0035] 30. Jumper wire; 31. First jumper wire; 32. Second jumper wire;
[0036] 40. Insulating reflective layer; 41. Reflective layer; 42. Insulating layer; 43. Adhesive layer. Detailed Implementation
[0037] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.
[0038] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.
[0039] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.
[0040] In the description of this invention, it should be noted that the terms "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this invention is in use. They are used only for the convenience of describing the invention and for 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. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.
[0041] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set" and "connection" 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 mechanical connection or an electrical connection. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.
[0042] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
[0043] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.
[0044] The technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.
[0045] In multi-cell modules, the number of jumpers increases and their layout becomes denser. Traditional solutions rely solely on the spacing between the busbars and the jumpers themselves to achieve insulation. During the lamination process, the flow of molten encapsulation material (such as EVA) can easily cause the jumpers to shift, making them physically contact the back of the cell or adjacent busbars, forming a short-circuit channel and increasing the short-circuit risk of the photovoltaic module.
[0046] This embodiment provides a photovoltaic module that can reduce the phenomenon of jumper wire misalignment, reduce the risk of jumper wire contact with solar cells, thereby reducing the risk of short circuit in the photovoltaic module, improving the safety of the photovoltaic module, and extending its service life.
[0047] like Figures 1-2As shown, the photovoltaic module mainly includes a cell string 10, a busbar 20, a jumper wire 30, and an insulating reflective layer 40. The busbar 20 is connected to the solder strips in the cell string 10. Both ends of the jumper wire 30 are connected to the busbar 20; or, one end of the jumper wire 30 is connected to the busbar 20, and the other end is connected to a junction box. The insulating reflective layer 40 is affixed to the light-receiving surfaces of the busbar 20 and the jumper wire 30, and the width of the insulating reflective layer 40 is greater than the width of the busbar 20 and the jumper wire 30 it covers.
[0048] Based on the above design, this embodiment adds an independent insulating reflective layer 40. First, a physical isolation barrier is constructed on the surface of the busbar 20 and the jumper 30. Even if the jumper 30 or the busbar 20 is displaced, the insulating reflective layer 40 can still effectively prevent direct contact between them and the battery cell or adjacent conductors, reducing the risk of short circuit. Second, since the width of the insulating reflective layer 40 is greater than the width of the busbar 20 and the jumper 30 it covers, both sides of the busbar 20 and the jumper 30 are completely wrapped by the insulating reflective layer 40, avoiding edge leakage caused by edge burrs or uneven flow of encapsulation material, thereby achieving full-coverage insulation protection for the jumper 30 and the busbar 20.
[0049] Meanwhile, the insulating reflective layer 40 has reflective properties, which can reflect the light that shines on the busbar 20 area and the jumper 30 area back to the surface of the cell. This allows the previously unused light to be absorbed by the cell and converted into electrical energy, making up for the light loss caused by the shading of the busbar 20 and jumper 30, and improving the power generation efficiency of the photovoltaic module.
[0050] In addition, the width of the insulating reflective layer 40 in this embodiment is greater than the width of the busbar 20 and the jumper 30 it covers, so that the jumper 30 and the busbar 20 are not visible on the front side (i.e. the light-receiving side) of the photovoltaic module, thereby improving the uniformity of the photovoltaic module's appearance.
[0051] like Figure 2 As shown, the insulating reflective layer 40 in this embodiment includes a reflective layer 41, an insulating layer 42, and an adhesive layer 43. The reflective layer 41 and the adhesive layer 43 are respectively connected to opposite sides of the insulating layer 42. The side of the adhesive layer 43 facing away from the insulating layer 42 is bonded to the busbar 20 or the jumper 30. The reflective layer 41 faces the light-receiving surface of the photovoltaic module.
[0052] In other words, the insulating layer 42 serves as an intermediate substrate, with a reflective layer 41 laminated on one side and an adhesive layer 43 laminated on the other side. The adhesive layer 43, facing away from the insulating layer 42, is firmly bonded to the front side (i.e., the light-receiving surface) of the busbar 20 or jumper 30 by hot pressing or bonding, ensuring that it does not peel off during photovoltaic module lamination and long-term use. The reflective layer 41 faces the light-receiving surface of the photovoltaic module, directly receiving and reflecting light.
[0053] In some optional embodiments, the adhesive layer 43 is made of a polymer material (such as modified EVA or POE) with good wettability to metal surfaces and resistance to aging. Its bonding strength with the busbar 20 and jumper 30 is much higher than that of a single insulating material, which can effectively resist thermal cycling stress and moisture erosion, reducing the risk of the insulation layer 42 falling off. The insulation layer 42 is made of an insulating film with high dielectric strength (such as PET or polyimide), and its thickness can be independently designed to ensure that the breakdown voltage meets safety standards. The reflective layer 41 can be made of a metal plating layer (such as an aluminum layer) or a high refractive index white coating. Its optical performance is not limited by the materials of the adhesive layer 43 and the insulation layer 42, improving the efficiency of specular reflection or diffuse reflection.
[0054] In some alternative embodiments, the reflective layer 41 is set to one of silver, white, or black.
[0055] The color selection for reflective layer 41 must balance optical performance and aesthetic requirements. Silver reflective layer 41 is typically an aluminum plating or a high-refractive-index silver coating.
[0056] The black reflective layer 41 uses a specially formulated black high-reflective material or a dark mirror material. While achieving light recovery, the black reflective layer 41 makes the busbar 20 and jumper 30 areas appear uniformly black from the front, avoiding the visual abruptness caused by traditional metallic reflective strips and enhancing the architectural aesthetic value in distributed photovoltaic or building-integrated photovoltaic (BIPV) scenarios.
[0057] Optionally, the thickness of the insulating reflective layer 40 is not less than 0.08 mm. For example, the thickness can be set to values such as 0.08 mm, 0.1 mm, 0.15 mm, and 0.2 mm. The width of the insulating reflective layer 40 is set between 5 mm and 20 mm. For example, the width can be set to values such as 5 mm, 8 mm, 12 mm, and 20 mm.
[0058] In some optional embodiments, at the connection between the busbar 20 and the jumper 30, the insulating reflective layer 40 on the busbar 20 and the insulating reflective layer 40 on the jumper 30 overlap to form a double-layer insulating reflective structure. In this way, on the one hand, the double-layer insulating layer 42 can further reduce the risk of breakdown and enhance the insulation performance; on the other hand, the double-layer reflective layer 41 can reduce light transmission loss and improve reflectivity. This double-layer insulating reflective structure is suitable for scenarios with high requirements for insulation and reflectivity, such as photovoltaic power stations with high humidity and high voltage.
[0059] In some optional embodiments, only the insulating reflective layer 40 on the busbar 20 is affixed at the connection between the busbar 20 and the jumper 30. Alternatively, only the insulating reflective layer 40 on the jumper 30 is affixed at the connection between the busbar 20 and the jumper 30. In other words, affixing only one type of insulating reflective layer 40 at the connection reduces the amount of material used for the insulating reflective layer 40, lowers the production cost of photovoltaic modules, and improves production efficiency. This is suitable for scenarios with high cost control requirements and basic performance requirements, such as distributed photovoltaic rooftops.
[0060] like Figure 1 As shown, in this embodiment, the jumper 30 is disposed in the gap between two adjacent battery strings 10, and the insulating reflective layer 40 on the jumper 30 does not contact the battery cells in the two adjacent battery strings 10.
[0061] The jumper 30 occupies the gap space (the gap between battery strings 10) that originally did not generate electricity, without occupying additional power generation area, thus achieving zero waste of space resources. Secondly, after the insulating reflective layer 40 is attached to the front of the jumper 30, although its width is greater than that of the jumper 30, it is still within the gap range. The insulating reflective layer 40 on the jumper 30 does not contact the battery cells in the two adjacent battery strings 10. This non-contact design ensures that the molten flow of the insulating reflective layer 40 during the lamination process will not cause it to stick to the edge of the battery cell, avoiding the risk of leakage or short circuit caused by contact with the metal grid lines at the edge of the battery cell.
[0062] In some alternative embodiments, the jumper 30 is disposed on the back of the battery string 10, the adhesive layer 43 is bonded to the jumper 30, and the reflective layer 41 is provided with insulating adhesive dots, which are bonded to the back of the battery cells in the battery string 10, so that the jumper 30 is fixed and hidden on the back of the battery string 10. Moving the jumper 30 to the back of the battery string 10 achieves physical concealment.
[0063] The jumper wire 30 is hidden behind the cell string 10, so only the cell string 10 is visible on the front of the photovoltaic module. There is no exposed jumper wire 30 or busbar 20, which solves the problem of cluttered appearance caused by exposed jumper wire 30 on the front of existing photovoltaic modules, improving the uniformity of the photovoltaic module's appearance. This is especially suitable for BIPV scenarios where appearance requirements are high. At the same time, the jumper wire 30 does not occupy space on the front of the photovoltaic module, avoiding shading of incident light and allowing the cells to fully receive light, increasing the front light-receiving area and improving power generation efficiency.
[0064] like Figure 1As shown, the busbar 20 includes an end busbar 21 and a middle busbar 22. The end busbar 21 is located at both ends of the battery string 10, i.e., the short side of the photovoltaic module, and is used to collect the current from the beginning and end of the battery string 10. It has no lead wire structure itself. The middle busbar 22 is located in the middle area of the battery string 10. For example, in a four-cell photovoltaic module, the battery string 10 is divided into upper and lower parts, and the middle busbar 22 is located at this dividing position. Both the end busbar 21 and the middle busbar 22 are connected to the solder strips in the battery string 10. The jumper 30 includes a first jumper 31 and a second jumper 32. One end of the first jumper 31 is connected to the end busbar 21, and the other end of the first jumper 31 is connected to the middle busbar 22; its function is to connect the upper and lower parts of the battery string 10 in series to form a complete electrical path. One end of the second jumper 32 is connected to the end busbar 21, and the other end of the second jumper 32 is connected to the junction box, thereby realizing the current output.
[0065] Furthermore, in this embodiment, the end of the intermediate busbar 22 is provided with an L-shaped lead wire. The L-shaped lead wire is perpendicular to the plane of the photovoltaic module and is used to connect to the junction box. Specifically, one end of the L-shaped lead wire extends along the intermediate busbar 22, and the other end is bent vertically and extends upward perpendicular to the plane of the photovoltaic module, for direct connection to the input terminal of the junction box. The L-shaped lead wire improves the convenience and reliability of connecting the intermediate busbar 22 to the junction box, simplifies the junction box installation process, and improves the production efficiency of the photovoltaic module.
[0066] Obviously, the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention, the scope of which is determined by the scope of the appended claims.
[0067] Note that in the description of this specification, the references to terms such as "some embodiments," "other embodiments," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.
Claims
1. A photovoltaic module, characterized by, The application relates to a photovoltaic module, which comprises the following components: a battery string (10); a busbar (20) connected with welding strips in the battery string (10); a jumper wire (30) with two ends connected with the busbar (20); or one end of the jumper wire (30) connected with the busbar (20) and the other end connected with a terminal box; an insulating and light-reflecting layer (40) attached to light-receiving surfaces of the busbar (20) and the jumper wire (30), and the width of the insulating and light-reflecting layer (40) is greater than the width of the busbar (20) and the width of the jumper wire (30). The insulating and light-reflecting layer (40) comprises a light-reflecting layer (41), an insulating layer (42) and an adhesive layer (43), the opposite sides of the insulating layer (42) are connected with the light-reflecting layer (41) and the adhesive layer (43) respectively, the side of the adhesive layer (43) away from the insulating layer (42) is connected with the busbar (20) or the jumper wire (30), and the light-reflecting layer (41) faces the light-receiving surface of a photovoltaic module. The light-reflecting layer (41) is provided in one of silver, white and black. The thickness of the insulating and light-reflecting layer (40) is not less than 0.08 mm. The width of the insulating and light-reflecting layer (40) is provided to be between 5 mm and 20 mm.
2. The photovoltaic module of claim 1, wherein, The insulating and light-reflecting layer (40) on the busbar (20) and the insulating and light-reflecting layer (40) on the jumper wire (30) overlap at the connection between the busbar (20) and the jumper wire (30); 3. The photovoltaic module of claim 2, wherein, Or, only the insulating and light-reflecting layer (40) on the busbar (20) is attached at the connection between the busbar (20) and the jumper wire (30); 4. The photovoltaic module of claim 2, wherein, Or, only the insulating and light-reflecting layer (40) on the jumper wire (30) is attached at the connection between the busbar (20) and the jumper wire (30).
5. The photovoltaic module of claim 2, wherein, The jumper wire (30) is arranged between two adjacent battery strings (10), and the insulating and light-reflecting layer (40) on the jumper wire (30) is not in contact with the battery pieces in the two adjacent battery strings (10).
6. The photovoltaic module of claim 2, wherein, The jumper wire (30) is arranged on the back of the battery string (10), the adhesive layer (43) is connected with the jumper wire (30), the light-reflecting layer (41) is provided with an insulating point adhesive, the insulating point adhesive is connected with the back of the battery piece in the battery string (10), so that the jumper wire (30) is fixed and hidden on the back of the battery string (10). The busbar (20) comprises end busbars (21) and middle busbars (22), the end busbars (21) are arranged in the end regions of the battery string (10), the middle busbars (22) are arranged in the middle region of the battery string (10), and the end busbars (21) and the middle busbars (22) are connected with the welding strips in the battery string (10). 7. The photovoltaic module of claim 2, wherein, 8. The photovoltaic module of claim 2, wherein, 9. The photovoltaic module of claim 1, wherein, The jumper wire (30) comprises a first jumper wire (31) and a second jumper wire (32), one end of the first jumper wire (31) is connected with the end busbar (21), the other end of the first jumper wire (31) is connected with the middle busbar (22); one end of the second jumper wire (32) is connected with the end busbar (21), the other end of the second jumper wire (32) is connected with the junction box.
10. The photovoltaic module of claim 9, wherein, An end of the middle busbar (22) is provided with an L-shaped lead-out wire, the L-shaped lead-out wire is arranged perpendicularly to the plane of the photovoltaic module and is used for being connected with the junction box.