Photovoltaic module

Abstract

The utility model relates to a photovoltaic module. The photovoltaic module comprises a laminated piece, a frame and a sealing piece. The laminated piece comprises a plurality of battery pieces, and the plurality of battery pieces are electrically connected through interconnection strips. The frame wraps the periphery of the laminated piece, a gap is formed between the frame and the laminated piece, and the interconnection strip extends into the gap and is connected with the bus bar located in the gap. The gap is filled with the sealing piece, and the interconnection strip and the bus bar are fixed in the gap through the sealing piece. The plurality of battery pieces in the laminated part are electrically connected through interconnection strips to form battery strings, and the interconnection strips of the plurality of battery strings are connected through bus bars located outside the laminated part and are used for transmitting current to the outside of the photovoltaic module. The interconnection strip and the bus bar are fixed in the gap between the frame and the laminated piece, so that a large area on the back surface of the laminated piece can be released, the conversion efficiency of the photovoltaic module in a unit area is improved, and hot spots are avoided. And the interconnection strips and the bus bars are hidden in the gaps, so that the aesthetic property of the photovoltaic module is also improved.

Description

Technical Field

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

[0002] Photovoltaic power generation is a technology that directly converts sunlight into electrical energy, and its core component is the photovoltaic module. A photovoltaic module mainly consists of multiple solar cells connected in series and parallel. These solar cells absorb sunlight and convert light energy into electrical energy. The efficiency of a photovoltaic module depends primarily on the conversion efficiency of the solar cells and the structural design of the module. In the circuit design of a photovoltaic module, multiple cells in the laminate are interconnected by interconnecting strips to form a cell string. The interconnecting strips of multiple cell strings are connected by busbars, which are used to collect and transmit the current generated by the solar cells.

[0003] In related technologies, the interconnecting strips and busbars are generally hidden on the back of the battery cell by folding.

[0004] However, due to the wide width and long length of the busbar, the resulting shading area is very large. This not only causes a decrease in the bifaciality of photovoltaic modules, but also easily leads to the occurrence of hot spots in severe cases. Utility Model Content

[0005] Therefore, it is necessary to provide a photovoltaic module to address the problem of large shading area of ​​the busbar.

[0006] A photovoltaic module, the photovoltaic module comprising:

[0007] A laminate comprising multiple solar cells electrically connected by interconnecting strips;

[0008] A frame, enclosing the outer periphery of the laminate, having a gap between the frame and the laminate, the interconnecting strip extending into the gap and connecting to a busbar located within the gap; and

[0009] A seal fills the gap, and the interconnecting strip and busbar are fixed within the gap by the seal.

[0010] In one embodiment, a groove is provided on the frame, and the busbar is located within the groove.

[0011] In one embodiment, the frame includes a bottom frame located on the back side of the laminate, and the groove is located on the bottom frame.

[0012] In one embodiment, the opening size of the groove is larger than the bottom size of the groove.

[0013] In one embodiment, the sealant is a sealant that wraps around the interconnect strip and the busbar.

[0014] In one embodiment, the sealant includes a first adhesive and a second adhesive, the first adhesive and the second adhesive being connected in the groove, the first adhesive and the second adhesive having different filling directions.

[0015] In one embodiment, the frame includes a side frame located on the side of the laminate, and the end of the side frame away from the bottom frame has an arcuate structure that wraps around the periphery of the front glass of the laminate.

[0016] In one embodiment, at least one protruding structure is provided on the side frame, the protruding structure extending toward the laminate.

[0017] In one embodiment, the frame includes a side frame located on the side of the laminate, and the upper surface of the side frame is not higher than the upper surface of the laminate.

[0018] In one embodiment, the frame includes an insulating composite material layer disposed on the side of the frame near the laminate.

[0019] In the aforementioned photovoltaic module, multiple solar cells within the laminate are electrically connected via interconnecting strips, which in turn are connected via busbars. These busbars transmit current to the outside of the photovoltaic module. The interconnecting strips and busbars are fixed within the gap between the frame and the laminate, freeing up a significant amount of surface area on the back of the laminate. This improves the conversion efficiency of the photovoltaic module per unit area and prevents hot spots. Furthermore, concealing the interconnecting strips and busbars within the gap enhances the aesthetics of the photovoltaic module. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of a photovoltaic module in one embodiment.

[0021] Figure 2 As one embodiment Figure 1 A magnified structural diagram of point A in the middle.

[0022] Reference numerals: 100, laminate; 110, interconnecting strip; 120, busbar; 200, frame; 210, bottom frame; 211, groove; 220, side frame; 221, arc-shaped structure; 222, raised structure; 300, seal; 310, first colloid; 320, second colloid. Detailed Implementation

[0023] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0024] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0025] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0026] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0027] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0028] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0029] See Figure 1 and Figure 2 This application provides a photovoltaic module according to one embodiment. The photovoltaic module includes a laminate 100, a frame 200, and a sealant 300. The laminate 100 includes a plurality of solar cells, which are electrically connected by interconnecting strips 110. The frame 200 surrounds the outer periphery of the laminate 100, and a gap exists between the frame 200 and the laminate 100. The interconnecting strips 110 extend into the gap and connect to busbars 120 located within the gap. The sealant 300 fills the gap, and the interconnecting strips 110 and busbars 120 are fixed within the gap by the sealant 300.

[0030] In this embodiment, multiple solar cells within the laminate 100 are electrically connected via interconnecting strips 110 to form a cell string. The interconnecting strips 110 of the multiple cell strings are connected via busbars 120 located outside the laminate 100 to transmit current to the outside of the photovoltaic module. The interconnecting strips 110 and busbars 120 are fixed within the gap between the frame 200 and the laminate 100, freeing up a large area on the back of the laminate 100, improving the conversion efficiency of the photovoltaic module per unit area, and preventing hot spots. Furthermore, hiding the interconnecting strips 110 and busbars 120 within the gap also improves the aesthetics of the photovoltaic module.

[0031] The laminate 100 includes a front glass, an encapsulating film, a battery cell, an encapsulating film, and a back glass, which are laminated sequentially. During lamination, the interconnecting strips that run through the front or back of the battery cell are led out of the laminate. Then, the interconnecting strips can be fixed to the back glass with sealing tape for welding busbars. Finally, the laminate is sent to the laminator for lamination.

[0032] In some embodiments, a groove 211 is provided on the frame 200, and the busbar 120 is located in the groove 211.

[0033] In this embodiment, a groove 211 is provided on the frame 200 to facilitate the busbar 120 to be placed in the groove 211, so as to prevent the busbar 120 from extending out of the frame 200 and blocking the back of the photovoltaic module.

[0034] Furthermore, the frame 200 includes a bottom frame 210, which is located on the back of the laminate 100, and a groove 211 is located on the bottom frame 210.

[0035] In this embodiment, the groove 211 is located on the bottom frame 210. When the sealant 300 is a sealant, the sealant can flow along the frame 200 into the groove 211 to prevent the sealant from overflowing. At the same time, when the sealant flows downward along the gap, the entrainment effect of the sealant facilitates the extension of the manifold 120 into the groove 211.

[0036] The frame 200 also includes a side frame 220, which is located on the side of the laminate 100 and is connected to the bottom frame 210.

[0037] Specifically, the opening size of groove 211 is larger than the bottom size of groove 211.

[0038] In this embodiment, the opening size of the groove 211 is smaller than the bottom size of the groove 211. For example, the groove 211 has a trapezoidal structure, which makes it easier for the sealant to wrap around the busbar 120 and extend into the groove 211.

[0039] In other embodiments, the groove 211 may also be rectangular, triangular or arc-shaped, or of course, other irregular or irregular structures.

[0040] In some embodiments, the sealant 300 is a sealant that wraps around the interconnecting strip 110 and the busbar 120.

[0041] In this embodiment, when installing the frame 200 onto the laminate 100, a portion of sealant can be injected into the interior of the frame 200 first. The sealant has a certain degree of fluidity and elasticity, which can buffer the mechanical stress generated on the interconnect strip 110 during the installation of the frame 200. After the frame 200 is installed, some of the sealant can wrap around the busbar 120 and enter the groove 211. Simultaneously, it can also prevent the board from bursting due to compressive stress on the lower busbar 120 caused by the weight of the laminate 100. Furthermore, injecting a portion of sealant into the interior of the frame 200 first, with its fluidity, can prevent scratches and breakage caused when the interconnect strip 110 is led out of the laminate 100 for encapsulation.

[0042] When the colloid fills the gap, the sealant can wrap the interconnect strip 110 and busbar 120, making the complete interconnect strip 110 and busbar 120 isolated from the air, which greatly improves the waterproof performance of the photovoltaic module.

[0043] Of course, in other embodiments, the seal 300 may also be other materials that can wrap around the interconnect strip 110 and the busbar 120 and have insulating properties, such as sealing rubber.

[0044] Furthermore, the sealant includes a first adhesive 310 and a second adhesive 320, which are connected in the groove 211, and the filling directions of the first adhesive 310 and the second adhesive 320 are different.

[0045] In this embodiment, during the application of sealant, a first adhesive 310 is first injected into the upper part of the frame 200 between the side frame 220 and the side wall of the laminate 100. The first adhesive 310 extends into the groove 211 located in the bottom frame 210. A second adhesive 320 is injected into the groove 211 from between the bottom frame 210 and the laminate 100. The sealant includes the first adhesive 310 and the second adhesive 320, which are connected in the groove 211. This allows the interconnecting strips 110 and busbars 120 exposed outside the laminate 100 to be completely encased in the sealant. Furthermore, it fills the gaps with sealant, improving the water-blocking performance of the photovoltaic module.

[0046] In some embodiments, the frame 200 includes a side frame 220 located on the side of the laminate 100. The side frame 220 has an arcuate structure 221 at one end away from the bottom frame 210. The arcuate structure 221 is used to wrap around the periphery of the front glass of the laminate 100.

[0047] In this embodiment, the side frame 220 has an arc-shaped structure 221 at the end away from the bottom frame 210. The arc-shaped structure 221 bends toward the laminate 100 to wrap around the periphery of the front glass of the laminate 100 and protect the front glass.

[0048] Furthermore, at least one protruding structure 222 is provided on the side frame 220, and the protruding structure 222 extends toward the photovoltaic module.

[0049] At least one protrusion 222 is provided on the side frame 220. The protrusion 222 is used to limit the laminate 100 on the one hand, and to reduce the contact area between the frame 200 and the laminate 100 on the other hand, so as to reduce the contact stress of the laminate 100 and reduce the risk of the laminate bursting.

[0050] In some other embodiments, the frame 200 includes a side frame 220 located on the side of the laminate 100, and the upper surface of the side frame 220 is not higher than the upper surface of the laminate 100.

[0051] In this embodiment, the frame 200 includes only the bottom frame 210 and the side frames 220, without a top frame 200, which reduces shading of the front of the photovoltaic module and improves the conversion efficiency of the photovoltaic module. Furthermore, the upper surface of the side frame 220 is not higher than the upper surface of the photovoltaic module, which reduces dust accumulation on the front of the photovoltaic module.

[0052] In some embodiments, the frame 200 includes an insulating composite material layer disposed on the side of the frame 200 near the laminate 100.

[0053] In this embodiment, the insulating composite material layer is disposed on the side of the frame 200 close to the laminate 100, which can avoid the installation risk caused by the small distance between the busbar 120 or interconnecting strip 110 and the frame 200, resulting in a small safe creepage distance.

[0054] In some embodiments, the frame 200 comprises only an insulating composite material layer, meaning the entire frame 200 is made of an insulating composite material. The insulating composite material can be at least one of glass fiber reinforced polyurethane composite material or basalt fiber material.

[0055] In some other embodiments, the frame 200 includes an aluminum alloy layer and an insulating composite material layer, the insulating composite material layer being disposed on the side of the frame 200 near the laminate 100.

[0056] In this application, multiple solar cells within the laminate 100 are electrically connected via interconnecting strips 110 to form a cell string. The interconnecting strips 110 of the multiple cell strings are connected via busbars 120 located outside the laminate 100, for transmitting current to the outside of the photovoltaic module. The interconnecting strips 110 and busbars 120 are fixed within the gap between the frame 200 and the laminate 100, freeing up a significant amount of area on the back of the laminate 100, improving the conversion efficiency of the photovoltaic module per unit area, and preventing hot spots. Furthermore, concealing the interconnecting strips 110 and busbars 120 within the gap also enhances the aesthetics of the photovoltaic module.

[0057] The first adhesive 310 is injected between the side frame 220 and the side wall of the laminate 100. After filling the gap between the side frame 220 and the side wall of the laminate 100, the first adhesive 310 flows into the groove 211. The second adhesive 320 is injected between the bottom frame 210 and the laminate 100 into the groove 211. That is, the first adhesive 310 and the second adhesive 320 converge and fuse in the groove 211 to completely fill the gap between the frame 200 and the laminate 100. The sealant can completely wrap the interconnecting strip 110 and the busbar 120 to improve waterproofness.

[0058] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0059] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A photovoltaic module, characterized in that, The photovoltaic module includes: The laminate (100) includes a plurality of solar cells, the plurality of solar cells being electrically connected by interconnecting strips (110); A frame (200) surrounds the outer periphery of the laminate (100), a gap is formed between the frame (200) and the laminate (100), and the interconnecting strip (110) extends into the gap and connects to the busbar (120) located within the gap; and A seal (300) fills the gap, and the interconnecting strip (110) and the busbar (120) are fixed within the gap by the seal (300).

2. The photovoltaic module according to claim 1, characterized in that, A groove (211) is provided on the frame (200), and the busbar (120) is located in the groove (211).

3. The photovoltaic module according to claim 2, characterized in that, The frame (200) includes a bottom frame (210) located on the back of the laminate (100), and the groove (211) is located on the bottom frame (210).

4. The photovoltaic module according to claim 2, characterized in that, The groove opening size of the groove (211) is larger than the groove bottom size of the groove (211).

5. The photovoltaic module according to claim 1, characterized in that, The sealant (300) is a sealant that wraps around the interconnecting strip (110) and the busbar (120).

6. The photovoltaic module according to claim 5, characterized in that, The sealant includes a first adhesive (310) and a second adhesive (320), the first adhesive (310) and the second adhesive (320) being connected in a groove (211) on the frame (200), and the first adhesive (310) and the second adhesive (320) having different filling directions.

7. The photovoltaic module according to claim 1, characterized in that, The frame (200) includes a side frame (220) located on the side of the laminate (100). The side frame (220) has an arc-shaped structure (221) at one end away from the bottom frame (210), and the arc-shaped structure (221) wraps around the periphery of the front glass of the laminate (100).

8. The photovoltaic module according to claim 7, characterized in that, At least one protruding structure (222) is provided on the side frame (220), and the protruding structure (222) extends toward the laminate (100).

9. The photovoltaic module according to claim 1, characterized in that, The frame (200) includes a side frame (220) located on the side of the laminate (100), and the upper surface of the side frame (220) is not higher than the upper surface of the laminate (100).

10. The photovoltaic module according to claim 1, characterized in that, The frame (200) includes an insulating composite material layer disposed on the side of the frame (200) near the laminate (100).

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