Photovoltaic device

Abstract

The embodiment of the present application provides a photovoltaic device, comprising: a color steel tile and a photovoltaic assembly, the photovoltaic assembly is arranged opposite to the color steel tile, the color steel tile comprises a color steel tile body and a convex ridge protruding relative to the color steel tile body, the convex ridge has a groove facing the photovoltaic assembly; and a first adhesive layer, the first adhesive layer is located at least in the groove, and the photovoltaic assembly is in contact with the first adhesive layer, the photovoltaic assembly and the color steel tile are fixed through the first adhesive layer. The embodiment of the present application is beneficial to simplify the installation process of fixing the color steel tile and the photovoltaic assembly and reduce the load requirement of the photovoltaic device on the roof.

Description

Technical Field

[0001] This invention relates to the field of solar photovoltaic technology, and in particular to a photovoltaic device. Background Technology

[0002] Currently, the construction of commercial and industrial rooftop power stations requires a large number of clamps or clamping blocks to securely install corrugated steel sheets and photovoltaic modules. These auxiliary components are costly in terms of materials and involve complex installation procedures, requiring multiple people to work together, resulting in high labor costs. Furthermore, the installation of numerous clamps or clamping blocks on the roof increases the load-bearing requirements of the roof. Summary of the Invention

[0003] The technical problem solved by the embodiments of the present invention is to provide a photovoltaic device that solves the problems of cumbersome procedures for fixing and installing color steel tiles and photovoltaic modules and the high load-bearing requirements of the photovoltaic device on the roof.

[0004] To address the aforementioned problems, this invention provides a photovoltaic device, comprising: a color steel tile and a photovoltaic module, wherein the photovoltaic module is disposed opposite to the color steel tile, the color steel tile includes a color steel tile body and protruding ribs relative to the color steel tile body, the protruding ribs having grooves facing the photovoltaic module; a first adhesive layer, the first adhesive layer being at least located within the grooves, and the photovoltaic module being in contact with the first adhesive layer, thereby fixing the photovoltaic module and the color steel tile together through the first adhesive layer.

[0005] In addition, the groove has a top opening and a bottom opening, and the top opening is located between the bottom opening and the photovoltaic module; the projected area of ​​the top opening on the photovoltaic module is greater than or equal to the projected area of ​​the bottom opening on the photovoltaic module.

[0006] In addition, the width of the top opening is 15mm to 30mm in the direction perpendicular to the extension direction of the convex rib.

[0007] In addition, the depth of the groove is greater than or equal to 2 mm.

[0008] In addition, in the cross-sectional direction perpendicular to the extension direction of the protrusion, the cross-sectional shape of the groove is an inverted trapezoid, and the angle range of the bottom corner of the groove is 90° to 150°.

[0009] Additionally, the protrusion has a top surface facing the photovoltaic module, and the groove connects to the adjacent top surface; the surface of the first adhesive layer is flush with the top surface, and the photovoltaic module is in contact with the top surface; or, the first adhesive layer protrudes from the top surface, and a first adhesive layer is present between the photovoltaic module and the top surface.

[0010] In addition, the width of the top surface is 5mm to 20mm in the direction perpendicular to the extension direction of the protrusion.

[0011] Additionally, the protrusion includes a first top plate, a bottom plate, and a second top plate connected in sequence. The surfaces of the first and second top plates facing the photovoltaic module are the top surfaces, the opposite sides of the first and second top plates are the sidewalls of the groove, and the surface of the bottom plate facing the photovoltaic module is the bottom surface of the groove. Furthermore, in the direction perpendicular to the top surface, the thickness of the bottom plate is less than or equal to the thickness of the first top plate, and the thickness of the bottom plate is less than or equal to the thickness of the second top plate.

[0012] In addition, the protrusion has at least one groove, the groove extending in the same direction as the protrusion; and along the protrusion extending direction, the ratio of the total length of the groove to the length of the protrusion is greater than or equal to 60%.

[0013] In addition, one of the protrusions has at least two spaced-apart grooves, and the extending direction of each groove is the same as the extending direction of the protrusion.

[0014] Additionally, the ridge has a groove, and the groove extends through the ridge along its extension direction.

[0015] In addition, the color steel tile is formed by bending or stamping the sheet material.

[0016] In addition, the photovoltaic device also includes: a locking platform, which is connected to the side of the corrugated steel tile body away from the protruding rib; and a first vertical locking structure, which is connected to the locking platform on the side away from the corrugated steel tile body.

[0017] In addition, the height of the locking platform protruding from the body of the corrugated steel tile is lower than the height of the rib protruding from the body of the corrugated steel tile.

[0018] In addition, the distance between the photovoltaic module and the first upright locking structure is greater than or equal to 25mm.

[0019] In addition, the photovoltaic device also includes: a snap-fit ​​structure for snap-fitting and fixing with snap-fit ​​holes of the roof beam; and a second upright locking structure for fixed connection with the snap-fit ​​structure. The second upright locking structure is used to lock and fix the first upright locking structures of the two color steel tiles, and the two first upright locking structures are respectively located on both sides of the second upright locking structure for fixing the two color steel tiles to the roof beam.

[0020] In addition, the second upright locking structure and the locking structure are integrally formed.

[0021] In addition, the engaging structure includes: an engaging portion that abuts against the engaging hole; and an arched portion that is connected to the engaging portion. The arched portion is also used to fit against the side wall of the roof beam located around the engaging hole, and the arched portion also has a protrusion in a direction away from the engaging hole.

[0022] In addition, the photovoltaic module includes: an even number of battery string units connected in series, each battery string unit group including: at least two battery strings connected in parallel, each battery string including at least two battery cells connected in series; a positive lead and a negative lead, wherein the positive lead and the negative lead are located on the same side of the battery string unit group.

[0023] In addition, the photovoltaic module also includes a diode, which is connected in parallel with the adjacent battery string unit group.

[0024] Compared with the prior art, the technical solution provided by the embodiments of the present invention has the following advantages:

[0025] In the photovoltaic device technical solution provided by this invention, the color steel tile includes a color steel tile body and protruding ribs relative to the color steel tile body. The ribs have grooves facing the photovoltaic module, and a first adhesive layer is provided within the grooves. The first adhesive layer enables the color steel tile and the photovoltaic module to be fixedly bonded together, eliminating the need for multiple people to use numerous clamps and pressure blocks, thus simplifying the installation process and saving material costs. Furthermore, the mass of the first adhesive layer is less than the mass of the clamps and pressure blocks, which helps reduce the load-bearing requirements of the photovoltaic device on the roof. In addition, the first adhesive layer can act as a reinforcing rib, enhancing the mechanical strength of the ribs and thus improving their compressive strength.

[0026] In addition, the rib has at least one groove, the groove extends in the same direction as the rib; and along the rib extension direction, the ratio of the total length of the groove to the length of the rib is greater than or equal to 60%, so as to ensure a large bonding area between the first adhesive layer and the photovoltaic module, thereby helping to ensure the bonding strength between the first adhesive layer and the photovoltaic module, and making the photovoltaic module and the first adhesive layer more firmly fixed. Attached Figure Description

[0027] One or more embodiments are illustrated by way of example with reference to the accompanying drawings, which are not to be limited in scale unless otherwise stated.

[0028] Figure 1 This is a partial cross-sectional structural diagram of a photovoltaic device provided in an embodiment of the present invention;

[0029] Figure 2This is a schematic cross-sectional view of a color steel tile provided in an embodiment of the present invention;

[0030] Figure 3 for Figure 2 A magnified structural diagram of region IV in the middle area;

[0031] Figure 4 This is another partial cross-sectional structural schematic diagram of a photovoltaic device provided in an embodiment of the present invention;

[0032] Figure 5 This is a schematic diagram of another cross-sectional structure of the color steel tile provided in an embodiment of the present invention;

[0033] Figure 6 for Figure 3 A top view schematic diagram of a type of convex rib structure;

[0034] Figure 7 for Figure 3 A top view schematic diagram of another type of convex rib structure;

[0035] Figure 8 This is a partial cross-sectional structural diagram of the connection between adjacent color steel tiles in a photovoltaic device provided in an embodiment of the present invention;

[0036] Figure 9 This is a cross-sectional structural diagram of the locking structure and the second vertical locking edge structure in the photovoltaic device provided in an embodiment of the present invention.

[0037] Figure 10 This is a schematic cross-sectional view of another type of locking structure and second vertical locking edge structure in the photovoltaic device provided in the embodiments of the present invention.

[0038] Figure 11 This is a schematic diagram of the internal circuit connection of the photovoltaic module in the photovoltaic device provided in an embodiment of the present invention. Detailed Implementation

[0039] As can be seen from the background technology, the existing technology involves complicated procedures for fixing and installing color steel tiles and photovoltaic modules, and the photovoltaic device has high load-bearing requirements on the roof.

[0040] Analysis shows that photovoltaic (PV) modules can be installed on corrugated steel roof tiles using conventional methods with clamps and other auxiliary components, or the entire roof can be constructed using a bracket system with horizontal and vertical drainage channels. PV modules are typically framed modules, mounted on the bracket system using clamps, with waterproof strips between the modules and the brackets to ensure water tightness. Regardless of the mounting method, a large number of clamps and other auxiliary components are required, increasing material costs. Furthermore, the installation process is complex, requiring multiple people and significantly wasting labor costs. These auxiliary components and brackets are usually made of materials such as aluminum profiles, hot-dip galvanized steel, aluminum alloy, or stainless steel, making them quite heavy and thus placing higher demands on the roof's load-bearing capacity. In addition, the waterproof strips have a limited lifespan; after aging, water can seep into the area where the PV modules and brackets are installed. If this water cannot be drained in time, it can lead to leaks throughout the roof.

[0041] To address the aforementioned problems, this invention provides a photovoltaic device comprising a corrugated steel sheet with grooves and a photovoltaic module. The photovoltaic module and the corrugated steel sheet are fixedly joined by a first adhesive layer located at least within the grooves. This method of installing and fixing the photovoltaic module and the corrugated steel sheet eliminates the need for heavy clamps and fixtures, thus reducing the load-bearing requirements of the photovoltaic module on the roof. Furthermore, filling the grooves with adhesive material to form the first adhesive layer simplifies the operation, simplifies the installation process, and saves labor costs.

[0042] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the various embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, those skilled in the art will understand that many technical details have been presented in the various embodiments of the present invention to enable the reader to better understand this application. However, the technical solutions claimed in this application can be implemented even without these technical details and various changes and modifications based on the following embodiments.

[0043] Figure 1 This is a partial cross-sectional structural diagram of a photovoltaic device provided in an embodiment of the present invention; Figure 2 This is a schematic cross-sectional view of a color steel tile provided in an embodiment of the present invention; Figure 3 for Figure 2 Enlarged schematic diagram of region IV in the middle; Figure 4 This is another partial cross-sectional structural schematic diagram of a photovoltaic device provided in an embodiment of the present invention; Figure 5 This is a schematic diagram of another cross-sectional structure of the color steel tile provided in an embodiment of the present invention.

[0044] Reference Figure 1 and Figure 2In this embodiment, the photovoltaic device includes: a color steel tile 100 and a photovoltaic module 101. The photovoltaic module 101 is disposed opposite to the color steel tile 100. The color steel tile 100 includes a color steel tile body 110 and a protruding rib 102 relative to the color steel tile body 110. The protruding rib 102 has a groove 112 facing the photovoltaic module 101. A first adhesive layer 103 is located at least in the groove 112, and the photovoltaic module 101 is in contact with the first adhesive layer 103. The photovoltaic module 101 and the color steel tile 100 are fixed by the first adhesive layer 103.

[0045] In this embodiment, the corrugated steel sheet 100 has at least two spaced-apart ribs 102. When the roof is rained on, water from the photovoltaic module 101 can flow from the edge of the photovoltaic module 101 into the space formed by the adjacent ribs 102 and the photovoltaic module 101, which helps to drain the water from the roof in a timely manner and avoids water accumulation on the photovoltaic module 101. In addition, since the two ends of the ribs 102 are open along the extension direction of the ribs 102, the space formed by the adjacent ribs 102 and the photovoltaic module 101 is a non-enclosed air duct, which can use air convection to remove the heat generated by the photovoltaic module 101 during operation.

[0046] Multiple photovoltaic modules 101 can be spaced apart along the extension direction of the rib 102. When the roof is rained on, the water on the photovoltaic modules 101 can flow into the space formed by the adjacent ribs 102 and the photovoltaic modules 101 through the gaps between adjacent photovoltaic modules 101, which further facilitates the timely drainage of water from the roof and prevents water accumulation on the photovoltaic modules 101. In addition, since there are gaps between adjacent photovoltaic modules 101, the space formed by the adjacent ribs 102 and the individual photovoltaic modules 101 is also a non-enclosed air duct. Air convection can also be used to remove the heat generated by the photovoltaic modules 101 during operation. Furthermore, the gaps between adjacent photovoltaic modules 101 provide more operating space for workers installing the photovoltaic modules 101, which is beneficial for workers to carry out the installation of photovoltaic modules 101 and the electrical connection work between adjacent photovoltaic modules 101. The photovoltaic module 101 and the corrugated steel sheet 100 can be fixedly connected through the first adhesive layer 103 located in the groove 12 of the protruding rib 102. This eliminates the need for multiple people to use a large number of clamps and pressure blocks, simplifying the installation process and saving material costs. Furthermore, the mass of the first adhesive layer 103 is less than that of the clamps and pressure blocks, which helps reduce the load-bearing requirements of the photovoltaic device on the roof. In this embodiment, the first adhesive layer 103 can be composed of structural adhesive or other pressure-sensitive adhesives.

[0047] Reference Figures 1 to 3The protrusion 102 has a top surface I facing the photovoltaic module 101, and the groove 112 connects the adjacent top surface I; the surface of the first adhesive layer 103 is flush with the top surface I, and the photovoltaic module 101 is in contact with the top surface I.

[0048] In this embodiment, the photovoltaic module 101 is in contact with both the first adhesive layer 103 and the top surface I of the rib 102. The first adhesive layer 103 can serve as a reinforcing rib, which is beneficial to enhancing the mechanical strength of the rib 102 and thus improving the compressive strength of the rib 102.

[0049] In other embodiments, reference is made to Figure 4 The first adhesive layer 103 can also protrude from the top surface I, and the photovoltaic module 101 and the top surface I have the first adhesive layer 103, which is conducive to further increasing the bonding area between the photovoltaic module 101 and the first adhesive layer 103 and improving the adhesion effect between the photovoltaic module 101 and the first adhesive layer 103.

[0050] In this embodiment, the groove 112 has a top opening a and a bottom opening b, and the top opening a is located between the bottom opening b and the photovoltaic module 101; the orthogonal projection area of ​​the top opening a on the photovoltaic module 101 is greater than or equal to the orthogonal projection area of ​​the bottom opening b on the photovoltaic module 101.

[0051] When the projected area of ​​the top opening a on the photovoltaic module 101 is greater than or equal to the projected area of ​​the bottom opening b on the photovoltaic module 101, the volume of the first adhesive layer 103 can be reduced, i.e., the amount of adhesive material used can be reduced, while ensuring that the adhesive thickness of the first adhesive layer 103 meets the fixing strength between the rib 102 and the photovoltaic module 101, and that the adhesive area between the first adhesive layer 103 and the photovoltaic module 101 also meets the fixing strength between the rib 102 and the photovoltaic module 101. This is beneficial to ensure the adhesion effect of the first adhesive layer 103 to the photovoltaic module 101 while saving the cost of adhesive material.

[0052] Specifically, in the direction perpendicular to the extension direction of the protrusion 102, the width of the top opening a is 15mm to 30mm, for example, 18mm, 20mm, or 25mm, which helps to ensure that the bonding area between the first adhesive layer 103 and the photovoltaic module 101 is large enough.

[0053] Furthermore, the width of the top surface I is 5mm to 20mm in the direction perpendicular to the extension direction of the rib 102. When the photovoltaic module 101 comes into contact with the top surface I, the top surface I can support the photovoltaic module 101, and the width of the top surface I is in the range of 5mm to 20mm, for example, 8mm, 10mm, or 15mm, which helps to ensure that the top surface I has sufficient support strength for the photovoltaic module 101.

[0054] The depth of groove 112 is greater than or equal to 2 mm.

[0055] In this embodiment, since the first adhesive layer 103 is located at least within the groove 112, the thickness of the first adhesive layer 103 is also greater than or equal to 2 mm. To ensure good adhesion of the first adhesive layer 103 to the photovoltaic module 101, the thickness requirement for the first adhesive layer 103 made of different adhesive materials varies. The thickness of the first adhesive layer 103 can be adjusted by adjusting the depth of the groove 112. It should be noted that ensuring the depth of the groove 112 is greater than or equal to 2 mm is beneficial to ensuring the connection strength between the first adhesive layer 103 and the photovoltaic module 101.

[0056] In the cross-sectional direction perpendicular to the extension direction of the protrusion 102, the cross-sectional shape of the groove 112 is an inverted trapezoid, and the angle range of the bottom corner of the groove 112 is 90° to 150°, for example, 100°, 120°, 140°.

[0057] In this embodiment, the angle range of the bottom corner of the groove 112 is 90° to 150°. On the one hand, this ensures that the projected area of ​​the top opening a of the groove 112 on the photovoltaic module 101 is greater than or equal to the projected area of ​​the bottom opening b on the photovoltaic module 101. On the other hand, the angle range of the corner of the first adhesive layer 103 disposed in the groove 112 is 90° to 150°, which helps to ensure that the first adhesive layer 103 has a good supporting effect on the photovoltaic module 101 when it acts as a reinforcing rib. It also makes the corner at the contact point between the photovoltaic module 101 and the top surface I of the protrusion 102 obtuse, which helps to reduce the stress concentration at this point on the protrusion 102. In addition, in terms of the difficulty of manufacturing color steel tile 100, it is relatively easy to make a qualified groove 112 with an obtuse bottom corner by using cold bending equipment and to make a qualified groove 112 with an obtuse bottom corner by using stamping equipment. The probability of making a qualified groove 112 with an acute bottom corner by using cold bending equipment is relatively low, and it is relatively difficult to make a groove 112 with an acute bottom corner by using stamping equipment.

[0058] Ideally, the bottom corner of the groove 112 is 135°, and the corner of the first adhesive layer 103 is also 135°. As a reinforcing rib, the first adhesive layer 103 provides the best support for the photovoltaic module 101.

[0059] It is understood that in other embodiments, the cross-sectional shape of the groove may also be rectangular, trapezoidal, or stepped, etc., in the cross-sectional direction perpendicular to the extension direction of the rib.

[0060] In this embodiment, the angle range of the corner at the connection between the corrugated rib 102 and the color steel tile body 110 can also be 90° to 150°, which is beneficial to improving the load-bearing strength of the color steel tile 100 on the photovoltaic module 101. In addition, at least one reinforcing rib, such as a rib plate, can be provided on the side of the color steel tile 100 away from the photovoltaic module 101 to improve the overall mechanical strength of the color steel tile 100.

[0061] Continue to refer to Figure 3 The protruding rib 102 includes a first top plate 122, a bottom plate 132, and a second top plate 142 connected in sequence, with the first top plate 122 and the second top plate 142 facing the photovoltaic module 101 (reference). Figure 1 The surface of the first top plate 122 and the second top plate 142 is the top surface I, the opposite side II of the first top plate 122 and the second top plate 142 is the sidewall of the groove 112, and the surface of the bottom plate 132 facing the photovoltaic module 101 is the bottom surface III of the groove 112; and in the direction perpendicular to the top surface I, the thickness of the bottom plate 132 is equal to the thickness of the first top plate 122, and the thickness of the bottom plate 132 is equal to the thickness of the second top plate 142.

[0062] Since the thickness of the base plate 132 is the same as the thickness of the first top plate 122 and the second top plate 142, the color steel tile 100 with this type of groove 112 can be made by cold bending equipment or stamping equipment.

[0063] In other embodiments, reference is made to Figure 5 Along the direction perpendicular to the top surface I, the thickness of the bottom plate 132 is less than the thickness of the first top plate 122, and the thickness of the bottom plate 132 is less than the thickness of the second top plate 142.

[0064] Figure 6 for Figure 3 A top view schematic diagram of a protruding rib; Figure 7 for Figure 3 The diagram shows another top view of the protruding rib. It should be noted that, to easily distinguish the top surface of the photovoltaic module facing the protruding rib, the sidewall of the groove, and the bottom surface of the groove, Figure 6 and Figure 7 The top surface of the photovoltaic module and the bottom surface of the groove were filled with different types of patterns.

[0065] Specifically, in conjunction with reference Figure 3 and Figure 6 The protrusion 102 has at least one groove 112, the extension direction of the groove 112 is the same as the extension direction of the protrusion 102; and along the extension direction of the protrusion 102, the ratio of the total length of the groove 112 to the length of the protrusion 102 is greater than or equal to 60%.

[0066] In this embodiment, the ratio of the total length of the groove 112 to the length of the ridge 102 is greater than or equal to 60%, which helps to ensure that there is a sufficiently large bonding area between the first adhesive layer 103 located in the groove 112 and the photovoltaic module 101, thereby helping to ensure a firm connection between the first adhesive layer 103 and the photovoltaic module 101.

[0067] Specifically, refer to Figure 6 A protrusion 102 has at least two spaced grooves 112, and the extending direction of each groove 112 is the same as the extending direction of the protrusion 102.

[0068] In this embodiment, since a single convex 102 has three spaced grooves 112, it should be noted that a single convex 102 may also have two, four or six spaced grooves 112. This embodiment does not limit the number of grooves 112 in a single convex 102.

[0069] Since the contact area between the top part of the convex rib 102 and the photovoltaic module 101 is relatively large, it is beneficial to further reduce the pressure exerted by the photovoltaic module 101 on the color steel tile 100, thereby improving the mechanical strength of the color steel tile 100 and ensuring the stability of the connection between the photovoltaic module 101 and the color steel tile 100.

[0070] 100 Corrugated Steel Sheets (Reference) Figure 1 The protruding ribs 102 can be formed first by cold bending equipment, and then multiple grooves 112 can be formed by stamping equipment; or the protruding ribs 102 and multiple grooves 112 can be formed by stamping multiple times in sequence.

[0071] In other embodiments, reference is made to Figure 7 The protrusion 102 has a groove 112, and the groove 112 extends through the protrusion 102 along the extending direction of the protrusion 102.

[0072] Since the groove 112 can accommodate multiple photovoltaic modules 101, the spacing between adjacent photovoltaic modules 101 can be flexibly adjusted according to different application environments. Furthermore, when the groove 112 passes through the rib 102, the color steel tile 100 can be bent into shape in one step by a cold bending machine, or it can be stamped into shape multiple times by a stamping machine.

[0073] In addition, continue to refer to Figure 1 The photovoltaic device may also include: a locking platform 104, which is connected to the side of the color steel tile body 110 away from the protrusion 102; and a first vertical locking structure 105, which is connected to the side of the locking platform 104 away from the color steel tile body 110.

[0074] In this embodiment, the photovoltaic device may include at least two corrugated steel sheets 100. Along the tilt direction of the roof, the corrugated steel sheet 100 is a single piece. In the direction perpendicular to the tilt direction of the roof, adjacent corrugated steel sheets 100 are sequentially spliced ​​together by a first vertical locking structure 105. Specifically, the two first vertical locking structures 105 of adjacent corrugated steel sheets 100 interlock to form a tight connection. This interlocking process does not require manual labor and is completed automatically by machinery. Moreover, this connection method does not restrict the free expansion and contraction of the corrugated steel sheet 100 along the extension direction of the rib 102 due to temperature. Therefore, when the temperature changes, it is beneficial to reduce the plate stress caused by thermal expansion and contraction of the corrugated steel sheet 100, avoid deformation of the corrugated steel sheet 100, ensure the reliability of the roof performance, and thus it is possible to manufacture corrugated steel sheets 100 with extra-long longitudinal dimensions without deformation due to stress. Since the corrugated steel sheet 100 can be a single piece along the roof's slope direction, there are no gaps on the corrugated steel sheet 100 in the direction perpendicular to the roof's slope direction. Furthermore, since adjacent corrugated steel sheets 100 are connected by the first vertical locking structure 105, there are no obvious gaps on the outer surface of the corrugated steel sheet 100 in the roof's slope direction, which helps improve the waterproofing of the photovoltaic device. In addition, the locking platform 104 connected to the first vertical locking structure 105 can be used to place a locking machine, facilitating locking operations on the first vertical locking structure 105 of adjacent corrugated steel sheets 100, thereby improving locking efficiency.

[0075] Specifically, the height of the seam locking platform 104 protruding from the corrugated steel sheet body 110 is lower than the height of the rib 102 protruding from the corrugated steel sheet body 110. The advantages of this design include:

[0076] On the one hand, when the protrusion 102 protrudes significantly from the corrugated steel tile body 110, the photovoltaic module 101 located above the protrusion 102 can also be positioned above the edge-locking platform 104. This allows for the placement of a larger photovoltaic module 101 on a corrugated steel tile 100 with a fixed surface area, which is beneficial for increasing the total utilization area of ​​the corrugated steel tile 100 in the photovoltaic device. On the other hand, since a junction box 10 is installed on one side of the back of the photovoltaic module 101, controlling the height of the edge-locking platform 104 protruding from the corrugated steel tile body 110 to be lower than the height of the protrusion 102 protruding from the corrugated steel tile body 110 helps reduce the probability of collision between the junction box 10 and the edge-locking platform 104 when the photovoltaic module 101 is large.

[0077] In this embodiment, the junction box 10 is connected to the back of the photovoltaic module 101 by an adhesive material, which can be silicone.

[0078] The distance between the photovoltaic module 101 and the first vertical locking structure 105 is greater than or equal to 25mm. On the one hand, the distance between the photovoltaic module 101 and the first vertical locking structure 105 can prevent water accumulation at the locking edges between the corrugated steel tiles 100 during heavy rain, thus improving the overall waterproof performance of the roof. On the other hand, making the distance between the photovoltaic module 101 and the first vertical locking structure 105 greater than or equal to 25mm also reduces the probability of collision between the junction box 10 and the locking platform 104.

[0079] Figure 8 This is a partial cross-sectional structural diagram of the connection between adjacent color steel tiles in a photovoltaic device provided in an embodiment of the present invention; Figure 9 A cross-sectional structural diagram of the locking structure and the second vertical locking edge structure in the photovoltaic device provided in this embodiment of the invention; Figure 10 A schematic diagram of another cross-sectional structure of the locking structure and the second vertical locking edge structure in the photovoltaic device provided in this embodiment of the invention.

[0080] refer to Figure 8 The photovoltaic device includes at least two corrugated steel sheets 100 (shown as dashed and dotted lines in the figure). Between adjacent corrugated steel sheets 100, there is also: a snap-fit ​​structure 106 for snap-fitting and fixing with snap-fit ​​holes 117 of the roof beam 107; and a second upright locking structure 108, which is fixedly connected to the snap-fit ​​structure 106. The second upright locking structure 108 is used to lock and fix the first upright locking structures 105 of the two corrugated steel sheets 100, and the two first upright locking structures 105 are respectively located on both sides of the second upright locking structure 108 for fixing the two corrugated steel sheets 100 to the roof beam 107.

[0081] In this embodiment, the second upright locking structure 108 and the locking structure 106 are integrally formed structures.

[0082] In this embodiment, since the second upright locking structure 108 is located between the two first upright locking structures 105 of adjacent corrugated steel sheets 100, and the locking structure 106 is locked and fixed with the locking hole 117 of the roof beam 107, the two corrugated steel sheets 100 can be fixed to the second upright locking structure 108 while the adjacent corrugated steel sheets 100 are connected by the first upright locking structure 105. Since the second upright locking structure 108 and the locking structure 106 are integrally formed, the two corrugated steel sheets 100 can be further fixed to the roof beam 107, which helps to simplify the installation process. In addition, the fixed connection between the corrugated steel sheets 100 and the roof beam 107 can be achieved without the use of purlins and clamps, which helps to save material costs, reduce the load-bearing requirements of the roof, and simplify the installation process.

[0083] Furthermore, in conjunction with references Figure 8 and Figure 9The engaging structure 106 includes: an engaging portion 116 that abuts against an engaging hole 117; and an arched portion 126 connected to the engaging portion 116. The arched portion 126 is also used to fit against the sidewall of the roof beam 107 located around the engaging hole 117, and the arched portion 126 also has a protrusion facing away from the engaging hole 117.

[0084] Since the engaging portion 116 abuts against the engaging hole 117, and the arched portion 126 fits against the side wall of the roof beam 107 located around the engaging hole 117, the engaging structure 106 achieves a fixed connection between the engaging structure 106 and the roof beam 107 by passing through the engaging hole 117 and abutting against both sides of the roof beam 107. Furthermore, the arched portion 126 has a protrusion pointing away from the engaging hole 117. When the engaging portion 116 is pulled and deformed, the arched portion 126 can also abut against the roof beam 107, further preventing the engaging structure 106 from detaching from the roof beam 107, which helps improve the wind pressure resistance of the engaging structure 106.

[0085] In this embodiment, the maximum outer diameter of the locking structure 106 is greater than the outer diameter of the locking hole 117, and the difference between the two is greater than or equal to 10mm. Furthermore, the thickness of the locking structure 106 can be 1mm greater than the thickness of the color steel tile 100, which helps to ensure a good locking effect between the locking structure 106 and the roof beam 107. In addition, the locking structure 106 can be a steel structure with good plasticity and toughness, and can be bent at multiple angles.

[0086] Furthermore, a second adhesive layer can be provided between the roof beam 107 and the corrugated steel sheet 100. The second adhesive layer is specifically located between the locking platform 104 and the roof beam 107, which helps to further strengthen the connection strength between the corrugated steel sheet 100 and the roof beam 107.

[0087] In other embodiments, reference is made to Figure 10 The arched part 126 connected to the engaging part 116 may not have a protrusion facing away from the engaging hole 117, but it can still achieve a fixed connection between the engaging structure 106 and the roof beam 107.

[0088] Figure 11 This is a schematic diagram of the internal circuit connection of the photovoltaic module in the photovoltaic device provided in an embodiment of the present invention.

[0089] refer to Figure 11 In this embodiment, the photovoltaic module 101 (reference) Figure 1The system includes: an even number of battery string units 109 connected in series, each battery string unit 109 including: at least two parallel battery strings 119, each battery string 119 including at least two battery cells 129 connected in series; a positive lead 139 and a negative lead 149, with the positive lead 139 and the negative lead 149 located on the same side of the battery string unit 109, which facilitates the electrical connection between adjacent photovoltaic modules 101 when multiple photovoltaic modules 101 are connected and installed.

[0090] In this embodiment, the number of parallel battery strings 119 in a group of battery string units 109 can be 1 to 4. In other embodiments, the number of parallel battery strings can also be more than 4. When the series-connected battery string units 109 are an even number, it can be ensured that the positive electrode lead 139 and the negative electrode lead 149 are installed on the same side of the photovoltaic module 101.

[0091] Furthermore, the photovoltaic module 101 may also include a diode 159, which is connected in parallel with the adjacent cell string unit group 109.

[0092] Under normal circumstances, when all solar cells 129 are fully illuminated and generating energy normally, diode 159 is reverse-biased, and current flows through each solar cell 129. When the light source of some solar cells 129 is blocked, the current flowing through these solar cells 129 decreases, causing them to become reverse-biased. At this point, diode 159 connected in parallel with these cells becomes forward-biased and conducts, allowing current to flow through diode 159, bypassing the malfunctioning solar cells 129. This prevents these solar cells 129 from acting as a load, generating heat, and consuming the energy generated by other illuminated solar cells 129, thus helping to reduce the impact of the hot spot effect on the photovoltaic module 101.

[0093] In summary, the photovoltaic device provided in this embodiment has advantages such as light weight, easy installation, good waterproof performance, and good heat dissipation, which helps to simplify the installation process of fixing the color steel tile 100 and the photovoltaic module 101 and reduce the load-bearing requirements of the photovoltaic device on the roof.

[0094] Those skilled in the art will understand that the above embodiments are specific examples of implementing the present invention, and in practical applications, various changes in form and detail can be made without departing from the spirit and scope of the present invention. Any person skilled in the art can make their own modifications and alterations without departing from the spirit and scope of the present invention; therefore, the scope of protection of the present invention should be determined by the scope defined in the claims.

Claims

1. A photovoltaic device, characterized by, The application relates to a color steel tile and a photovoltaic module, wherein the photovoltaic module is arranged opposite to the color steel tile; the color steel tile comprises a color steel tile body and a convex ridge protruding from the color steel tile body; the convex ridge has a groove facing the photovoltaic module and a top surface facing the photovoltaic module; the groove connects adjacent top surfaces; a first adhesive layer is arranged on the convex ridge and in contact with the photovoltaic module; the photovoltaic module is fixed to the color steel tile through the first adhesive layer; the surface of the first adhesive layer is flush with the top surface, and the photovoltaic module is in contact with the top surface; or the first adhesive layer protrudes from the top surface, and the photovoltaic module is separated from the top surface by the first adhesive layer; a space for draining and dissipating heat is formed between adjacent convex ridges and photovoltaic modules; one convex ridge has at least two grooves arranged at intervals; the extending direction of each groove is the same as the extending direction of the convex ridge; and the ratio of the total length of the grooves to the length of the convex ridge is greater than or equal to 60% along the extending direction of the convex ridge; the groove has opposite top and bottom openings, and the top opening is located between the bottom opening and the photovoltaic module; the area of the top opening projected on the photovoltaic module is greater than or equal to the area of the bottom opening projected on the photovoltaic module; the width of the top opening is 15-30 mm along the direction perpendicular to the extending direction of the convex ridge; the depth of the groove is greater than or equal to 2 mm; the cross-sectional shape of the groove is inverted trapezoidal along the direction perpendicular to the extending direction of the convex ridge; the angle of the bottom corner of the groove ranges from 90 DEG to 150 DEG; the width of the top surface is 5-20 mm along the direction perpendicular to the extending direction of the convex ridge; the convex ridge comprises a first top plate, a bottom plate and a second top plate connected in sequence; the surfaces of the first and second top plates facing the photovoltaic module are the top surface; the opposite sides of the first and second top plates are the side walls of the groove; and the surface of the bottom plate facing the photovoltaic module is the bottom surface of the groove; the thickness of the bottom plate is less than or equal to the thickness of the first top plate and the second top plate along the direction perpendicular to the top surface; the convex ridge has one groove, and the groove penetrates through the convex ridge along the extending direction of the convex ridge; the color steel tile is formed by bending or stamping; the color steel tile is connected with a locking platform which is connected with a first vertical locking structure; the height of the locking platform protruding from the color steel tile body is lower than the height of the convex ridge protruding from the color steel tile body; the distance between the photovoltaic module and the first vertical locking structure is greater than or equal to 25 mm; the color steel tile comprises at least two color steel tiles; and the color steel tile comprises a locking platform and a first vertical locking structure. ​ ​ ​ ​ 2. The photovoltaic device of claim 1, wherein, ​ 3. The photovoltaic device of claim 2, wherein, ​ 4. The photovoltaic device of claim 2, wherein, ​ 5. The photovoltaic device of claim 1 or 2, wherein, ​ 6. The photovoltaic device of claim 1, wherein, ​ 7. The photovoltaic device of claim 1, wherein, ​ 8. The photovoltaic device of claim 1, wherein, ​ 9. The photovoltaic device of claim 8, wherein, ​ 10. The photovoltaic device of claim 1, wherein, ​ ​ ​ 11. The photovoltaic device of claim 10, wherein, ​ 12. The photovoltaic device of claim 10, wherein, ​ 13. The photovoltaic device of claim 10, wherein, ​ ​ The engagement structure is used for engaging with the engagement hole of the roof beam; The second standing seam structure is fixedly connected with the engagement structure, and is used for being fixed with the first standing seam structure of two color steel tiles. The first standing seam structures of the two color steel tiles are respectively located on the two sides of the second standing seam structure, and are used for fixing the two color steel tiles with the roof beam.

14. The photovoltaic device of claim 13, wherein, The second standing seam structure and the engagement structure are integrally formed.

15. The photovoltaic device of claim 13, wherein, The engagement structure The engagement structure includes: an engagement part which is in abutment with the engagement hole; and an arcuate part which is connected with the engagement part and is used for fitting the side wall of the roof beam around the engagement hole, and The arcuate part further has a protrusion which is directed away from the engagement hole.

16. The photovoltaic device of claim 1, wherein, The photovoltaic module comprises: groups of cell string units in series, each group of cell string units comprising: at least two parallel cell strings, each cell string comprising at least two series-connected cell pieces; a positive electrode lead-out wire and a negative electrode lead-out wire, and the positive electrode lead-out wire and the negative electrode lead-out wire are located on the same side of the group of cell string units.

17. The photovoltaic device of claim 16, wherein, Further comprising: A diode which is connected in parallel with an adjacent group of cell string units.

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