Photovoltaic panels and their frame components

Abstract

The present invention discloses a frame assembly, including a plurality of steel frames and a plurality of angle steels, two adjacent steel frames are connected by one of the angle steels, the steel frames include a first horizontal plate, a second horizontal plate and a third horizontal plate which are spaced apart from each other, the steel frames also include a first vertical plate, the first vertical plate is connected between the first horizontal plate and the second horizontal plate, and a mounting groove for inserting a laminate of a solar cell module is formed between the three, and the mounting groove has a notch facing the right side. The first horizontal plate has a first inclined portion so that the notch height of the mounting groove is less than the height inside the mounting groove; the second horizontal plate has a second inclined portion which gradually tilts downward from left to right, and the second inclined portion is located on the right side of the notch of the mounting groove. The frame assembly of the photovoltaic module of the present invention has a low cost, and the connection with the laminate of the solar cell module is relatively stable and reliable, and can improve the light utilization rate of the double-sided solar cell module.

Description

Technical Field

[0001] The invention relates to a photovoltaic component and a frame component thereof. Background Art

[0002] In the course of photovoltaic development, improving module efficiency and reducing module costs have always been the two major goals of photovoltaic R&D personnel. Through years of research, the efficiency of photovoltaic cells has been continuously improved. At the same time, major mainstream manufacturers have reduced costs on the module side through different process combinations and auxiliary material solutions. The frame accounts for more than 23% of non-silicon materials. In recent years, the price of aluminum profiles has increased too fast, resulting in a linear increase in module costs, with each set of frames increasing by nearly 50%. In order to achieve cost reduction and efficiency improvement, it is necessary to develop a new steel frame to replace the aluminum frame. In addition, as the size of the battery cell becomes larger and larger, the area of ​​the module is also increasing. The frame needs to have higher hardness and tensile strength. Steel has higher hardness and tensile strength than aluminum. Therefore, the development of steel frames is a trend, which can not only reduce the cost of the module, but also ensure the safe service life of the module. However, the steel frame is cold-pressed, which is very different from the extrusion molding of the aluminum frame, and the steel frame needs to be optimized. Summary of the invention

[0003] In view of the above problems, the purpose of the present invention is to provide a frame assembly of a photovoltaic module, which has a low cost, a relatively stable and reliable connection with the laminate of the solar cell module, and can improve the light utilization rate of the double-sided solar cell module.

[0004] Another object of the present invention is to provide a photovoltaic module which has low cost, good connection stability and high light utilization.

[0005] According to one aspect of the present invention, a frame assembly includes:

[0006] A plurality of steel frames and a plurality of angle steels, two adjacent steel frames are connected by one of the angle steels, the steel frames include a first horizontal plate, a second horizontal plate and a third horizontal plate which are spaced apart from each other, the steel frames also include a first vertical plate and a second vertical plate, the first vertical plate is connected between the first horizontal plate and the second horizontal plate, and a mounting groove for inserting a laminate of a solar cell module is formed between the three, and the mounting groove has a notch facing the right side; the second vertical plate is connected between the second horizontal plate and the third horizontal plate, and a connecting groove for inserting the angle steel is formed between the three, and the connecting groove has a notch facing the left side; the first horizontal plate has a first inclined portion so that the notch height of the mounting groove is less than the height inside the mounting groove, and the first inclined portion is gradually inclined downward from left to right; the second horizontal plate has a second inclined portion which is gradually inclined downward from left to right and a flat plate portion which is opposite to the first horizontal plate, the second inclined portion extends downward from the right side edge of the flat plate portion, and the second inclined portion is located on the right side of the notch of the mounting groove.

[0007] In a preferred embodiment, the angle steel includes a top corner portion and two connecting portions, wherein one connecting portion extends from the top corner portion along a first direction, and the other connecting portion extends from the top corner portion along a second direction, and the angle between the first direction and the second direction is greater than 0 and less than 180 degrees, and each of the connecting portions is respectively inserted into the connecting grooves of two adjacent steel frames, and each of the connecting portions has an upper connecting plate connected to the second cross plate and a lower connecting plate connected to the third cross plate.

[0008] In a more preferred embodiment, the upper connecting plate has a third inclined portion matched with the second inclined portion; the upper and lower ends of the corner portions are used to accommodate the corner portions of the two steel frames, the upper end of the corner portion is flush with the top surface of the steel frame, and the lower end of the corner portion is flush with the bottom surface of the steel frame, so as to make the appearance beautiful and avoid scratches.

[0009] Further, the upper connecting plate is provided with at least one connecting hole group, each of which includes a first hole and two second holes, the aperture of the first hole is larger than the aperture of the second hole, the line connecting the centers of the first hole and the two second holes forms a triangle, the lower surface of the second cross plate has a plurality of protrusions corresponding to the connecting hole group, and one of the protrusions is inserted into the first hole and each of the second holes; the lower connecting plate is provided with at least one connecting hole group, each of which includes a first hole and two second holes, the aperture of the first hole is larger than the aperture of the second hole, the line connecting the centers of the first hole and the two second holes forms a triangle, the upper surface of the third cross plate has a plurality of protrusions corresponding to the connecting hole group, and one of the protrusions is inserted into the first hole and each of the second holes. The protrusions are inserted into the first and second holes of the angle steel, which effectively ensures the close contact between the two sides of the angle steel and the lower surface of the second cross plate and the third cross plate, which not only ensures the firm installation, but also plays a role in aesthetics.

[0010] In a preferred embodiment, the triangle is an isosceles triangle, and the line connecting the centers of the two second holes is the base of the isosceles triangle.

[0011] In a preferred embodiment, the diameter of the first hole is twice or more than the diameter of the second hole. The force applied to the first hole is equivalent to the force applied to two of the second holes, thereby extending the service life of the angle steel.

[0012] In a preferred embodiment, the steel frame further comprises a connecting edge, the connecting edge comprises a second bending edge formed by bending from the upper left side of the third horizontal plate and a third bending edge formed by bending downward from the upper side of the second bending edge; each of the connecting portions further comprises a vertical connecting plate, the vertical connecting plate is connected between the upper connecting plate and the lower connecting plate, and a notch groove for accommodating the connecting edge is formed at the connection between the vertical connecting plate and the lower connecting plate. The arrangement of the second bending edge and the third bending edge effectively prevents the frame installation personnel and the handling component personnel from being cut. In a preferred embodiment, the notch groove has a first mating surface extending upward from the lower connecting plate and a second mating surface connected between the first mating surface and the vertical connecting plate, and the first mating surface and the second mating surface are arranged obliquely along the first direction or the second direction so that the notch groove has a smaller area of ​​a cross section perpendicular to the first direction or the second direction near the top corner. This makes it easy to connect the angle steel in the initial stage of the matching process with the steel frame, and it is also easier to fit the frame after the assembly is completed.

[0013] In a preferred embodiment, the first transverse plate further comprises a first bent edge portion formed by bending leftward from the right side of the first inclined portion. The first bent edge portion can effectively prevent the glass from being scratched.

[0014] According to another aspect of the present invention, a photovoltaic assembly includes the frame assembly as described above and a solar cell assembly laminate installed in the frame assembly.

[0015] The present invention adopts the above solution, which has the following advantages compared with the prior art:

[0016] The frame assembly of the present invention has a first inclined portion gradually inclined downward on the first horizontal plate and a second inclined portion gradually inclined downward on the second horizontal plate. When the encapsulated solar cell assembly (at least including the panel and the back plate located on the front and back sides of the solar cell assembly sheet) is installed, the edge of the solar cell assembly laminate is inserted into the installation groove. Due to thermal expansion and contraction, under normal circumstances, the solar cell assembly laminate is pressed against the second horizontal plate by the first inclined portion at the notch. At this time, there is a margin in the installation groove for the thermal expansion of the solar cell assembly laminate, that is, when the glass expands due to heat (especially when the light amplitude is strong or the time is long), the first inclined portion is slightly deformed, and the thickness of the main part of the installation groove (for example, the part close to the first vertical plate) can still match the thickness of the expanded solar cell assembly laminate, so that the edge of the solar cell assembly laminate is not squeezed by the frame, thereby avoiding damage or hidden cracks to the edge of the solar cell; moreover, the second inclined portion located on the back of the solar cell assembly can reflect the light reflected by the back plate and other components to the solar cell assembly for a second time, thereby reducing the blocking of the back of the battery, improving the light utilization rate, and improving the power generation of the solar cell assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solution of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0018] Figure 1 is a schematic structural diagram of a frame assembly according to an embodiment of the present invention;

[0019] Figure 2 is a schematic diagram of a frame assembly according to an embodiment of the present invention from a first viewing angle;

[0020] Figure 3 is a schematic diagram of a frame assembly according to an embodiment of the present invention from a second viewing angle;

[0021] Figure 4 It is a structural schematic diagram of the angle steel from the first perspective;

[0022] Figure 5 It is a structural schematic diagram of the angle steel from a second perspective;

[0023] Figure 6 It is a structural schematic diagram of the angle steel from the third perspective;

[0024] Figure 7 It is a structural diagram of a steel frame;

[0025] Figure 8 Schematic diagram of the structure of the solar cell module laminate installed behind the steel frame.

[0026] in,

[0027] 1. Steel frame; 11. First horizontal plate; 111. First inclined portion; 112. First bent edge portion; 12. Second horizontal plate; 121. Second inclined portion; 122. Flat portion; 13. Third horizontal plate; 14. First vertical plate; 15. Second vertical plate; 151. Groove; 16. Connecting edge; 161. Second bent edge portion; 162. Third bent edge portion; 3. Mounting groove; 4. Connecting groove;

[0028] 2. Angle steel; 21. Top corner portion; 211. Top corner groove; 22. Connecting portion; 221. Upper connecting plate; 2211. Third inclined portion; 222. Lower connecting plate; 223. Vertical connecting plate; 5. Connecting hole group; 51. First hole; 52. Second hole; 6. Protrusion; 7. Notch groove; 71. First mating surface; 72. Second mating surface; 8. Solar cell module laminate. DETAILED DESCRIPTION

[0029] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art. It should be noted that the description of these embodiments is used to help understand the present invention, but does not constitute a limitation of the present invention.

[0030] Figures 1 to 8The embodiment shows that a frame assembly of a photovoltaic module is provided, which includes a plurality of steel frames 1 and a plurality of angle steels 2, two adjacent steel frames 1 are connected by an angle steel 2, and typically, four steel frames 1 are connected end to end by four angle steels 2 to form a rectangular frame. The steel frame 1 includes a first horizontal plate 11, a second horizontal plate 12 and a third horizontal plate 13 arranged at intervals up and down. The steel frame 1 also includes a first vertical plate 14 and a second vertical plate 15, the first vertical plate 14 is connected between the first horizontal plate 11 and the second horizontal plate 12, and a mounting groove 3 for inserting a laminate of a solar cell module is formed between the three, and the mounting groove 3 has a notch facing the right side. The second vertical plate 15 is connected between the second horizontal plate 12 and the third horizontal plate 13, and a connecting groove 4 for inserting an angle steel 2 is formed between the three, and the connecting groove 4 has a notch facing the left side. A groove 151 is formed on the left side surface of the second vertical plate 15, and the groove 151 is formed by two bends on the second vertical plate 15, and the two bends are arranged at intervals up and down, and the groove 151 faces the notch of the connecting groove 3. The groove 151 is designed to fit the fingers, which is ergonomic and convenient to carry. Figure 7 The dimension in the left-right direction) is smaller than 1 / 3 of the width of the third horizontal plate 13, specifically, smaller than 1 / 10, which can effectively avoid dust accumulation and thus extend the service life of the frame.

[0031] Furthermore, the first horizontal plate 11 has a first inclined portion 111 so that the notch height of the mounting groove 3 is less than the height inside the mounting groove 3, and the first inclined portion 111 gradually inclines downward from left to right. When the encapsulated solar cell assembly (at least including the panel and back plate located on the front and back sides of the solar cell assembly) is installed, the edge of the solar cell assembly laminate is inserted into the mounting groove. Due to the phenomenon of thermal expansion and contraction, the solar cell assembly laminate is normally pressed against the second horizontal plate at the notch by the first inclined portion. At this time, there is a margin in the mounting groove for the thermal expansion of the solar cell assembly laminate, that is, when the glass is thermally expanded (especially when the illumination amplitude is strong or the time is long), the first inclined portion is slightly deformed, and the thickness of the main part of the mounting groove (for example, the part close to the first vertical plate) can still match the thickness of the expanded solar cell assembly laminate, so that the edge of the solar cell assembly laminate is not squeezed by the frame, thereby avoiding damage or hidden cracks to the edge of the solar cell. The first horizontal plate 11 also has a first bent edge 112 formed by bending leftward from the right side of the first inclined portion 111. The first bent portion 112 is attached to the lower surface of the first inclined portion 111 , which can effectively prevent the glass from being scratched due to the steel cross-section cut when the component is installed into the installation groove 3 .

[0032] The second transverse plate 12 has a second inclined portion 121 that gradually inclines downward from left to right and a flat plate portion 122 that faces the first transverse plate 11. The second inclined portion 121 extends downward from the right side of the flat plate portion 122. The second inclined portion 121 is located on the right side of the slot of the installation slot 3. Figure 8 As shown, after the solar cell assembly (in this embodiment, the solar cell assembly adopts a double-sided solar cell assembly) is placed in the mounting groove 3, when sunlight irradiates, a part of the sunlight will irradiate or be reflected onto the back side of the solar cell assembly corresponding to the second inclined portion 121, and part of the light is reflected by the back plate onto the second inclined portion 121, and the second inclined portion 121 then reflects the light onto the solar cell assembly board, thereby improving the light absorption rate of the solar cell assembly and improving the power generation efficiency.

[0033] Reference Figure 7 As shown, the steel frame 1 also includes a connecting edge 16, and the connecting edge 16 includes a second bent edge 161 formed by bending from the upper left side of the third horizontal plate 13 and a third bent edge 162 formed by bending downward from the upper side of the second bent edge 161. The provision of the second bent edge 161 and the third bent edge 162 effectively prevents frame installers and assembly transporters from being cut. After the steel frame 1 is cold-formed, all bending positions are chamfered with arcs, and the bending positions are kept evenly stressed, will not be subjected to stress fracture at the bending position, and can ensure the smoothness of the frame surface.

[0034] Reference Figures 4 to 6 As shown, the angle steel includes a top corner portion 21 and two connecting portions 22. One of the connecting portions 22 extends from the top corner portion 21 along a first direction, and the other connecting portion 22 extends from the top corner portion 21 along a second direction. The angle between the first direction and the second direction is greater than 0 and less than 180 degrees. Each connecting portion 22 is respectively inserted into the connecting groove 4 of two adjacent steel frames 1, and each connecting portion 22 has an upper connecting plate 221 connected to the flat plate portion 122 and a lower connecting plate 222 connected to the third horizontal plate 13. The upper connecting plate 221 also has a third inclined portion 2211, and the third inclined portion 2211 and the lower connecting plate 222 are laser welded. This method can ensure greater force, and the two sides will not be disengaged under force, which increases the force of the component; the welding part is not visible on the outside, and the aesthetics of the angle steel 2 is ensured. In order to prevent the angle steel 2 from being corroded for a long time, the surface after welding is sprayed with aluminum-zinc-magnesium plating, which can ensure the long-term life of the steel angle steel 2 and reach consistency with the quality assurance of the component.

[0035] Specifically, the third inclined portion 2211 cooperates with the second inclined portion 121 of the steel frame, effectively ensuring the smooth assembly of the angle steel 2 and the frame 1. The upper and lower ends of the top corner portion 21 have top corner receiving grooves 211 for accommodating the top corner portions of the two steel frames 1. Figure 3As shown, the upper end of the top corner portion 21 is flush with the top surface of the steel frame 1, and the lower end of the top corner portion 21 is flush with the bottom surface of the steel frame 1. This makes the appearance beautiful and avoids scratches.

[0036] Furthermore, in this embodiment, a connection hole group 5 is provided on both the upper connection plate 221 and the lower connection plate 222, and each connection hole group 5 includes a first hole 51 and two second holes 52. The aperture of the first hole 51 is larger than the aperture of the second hole 52, and the aperture of the first hole 51 is twice or more than the aperture of the second hole 52. The force of the first hole 51 is equivalent to the force of the two second holes 52, which prolongs the service life of the angle steel 2. The line connecting the centers of the first hole 51 and the two second holes 52 forms a triangle, which is an isosceles triangle (the positions of the first hole 241 and the second hole 242 are symmetrically opened with the center line of the single-sided plane), and the line connecting the centers of the two second holes 52 is the base of the isosceles triangle, which ensures that the angle steel 2 will not shake after being installed in the steel frame 1. The lower surface of the second horizontal plate 12 of the steel frame 1 has a plurality of protrusions 6 corresponding to the connection hole group 5, and a protrusion 6 is inserted into the first hole 51 and each second hole 52. The diameter of the first hole 51 and the second hole 52 of the angle steel is consistent with the diameter of the protrusion 6, which can ensure that the protrusion 6 will not swing freely back and forth in the first hole 51 and the second hole 52, and the protrusion 6 will be evenly stressed after being snapped inside the hole, and will not easily break. More specifically, after the angle steel 2 is pushed into the steel frame 1, the protrusion 6 of the steel frame 1 is snapped into the first hole 51 and the second hole 52 of the angle steel 2, which effectively ensures the close contact between the two sides of the angle steel 2 and the lower surface of the second horizontal plate 12 and the third horizontal plate 13, which not only ensures a firm installation, but also has an aesthetic effect. The upper connecting plate 221 and the lower connecting plate 222 are both provided with a connecting hole group 5 to prevent the other side from being unevenly stressed and falling off after the one-sided protrusion 6 and the connecting hole group 5 are matched.

[0037] Each connecting portion 22 of the angle steel 2 also includes a vertical connecting plate 223, which is connected between the upper connecting plate 221 and the lower connecting plate 222. A notch groove 7 for accommodating the connecting edge 16 is formed at the connection between the vertical connecting plate 223 and the lower connecting plate 222. The notch groove 7 has a first mating surface 71 extending upward from the lower connecting plate 222 and a second mating surface 72 connected between the first mating surface 71 and the vertical connecting plate 223. The first mating surface 71 and the second mating surface 72 are inclined along the first direction or the second direction so that the cross-section area of ​​the notch groove 7 near the top corner 21 that is perpendicular to the first direction or the second direction is smaller. This makes it easy to connect the angle steel 2 with the steel frame 1 in the initial stage of the matching process, and it is also easier to fit the frame after the assembly is completed. As the angle steel 2 enters the steel frame 1, the contact area between the angle steel 2 and the frame 1 becomes larger and larger. After the angle steel completely connects the long and short frames without a gap, the frame protrusion 6 is just stuck in the first hole 51 and the second hole 52 of the angle steel 2, and the notch groove 3 near the top corner 1 in the angle steel 2 and the connecting edge 16 are matched without gap. After this, the notch groove 3 and the connecting edge 16 are in a tight fit, which is more beautiful and ensures that the angle steel 2 will not shake up and down or left and right in the notch 3 of the frame, solving the problems caused by the accuracy of the steel frame and improving the product yield. This structural change can also prevent the damage of the frame and the angle steel surface coating due to friction during the frame assembly process, effectively increasing the corrosion resistance of the steel.

[0038] The thickness of the connecting edge 16 of the steel frame 1 of this embodiment corresponds to the depth of the notch groove 7 of the angle steel 2. Firstly, the angle steel 2 and the steel frame 1 form a plane at the contact position to ensure the beauty after assembly; secondly, it is to add a layer of protection after the angle steel 2 and the steel frame 1 are assembled, so that the angle steel 2 cannot swing back and forth inside the steel frame 1, thereby increasing the external bearing capacity. A circular arc surface is formed between the first mating surface 71 and the second mating surface 72 of the angle steel 2. After mating with the steel frame 1, firstly, it can avoid the incision position at the connecting edge 16 from hurting people, and secondly, it ensures that the angle steel 2 and the steel frame 1 are on the same horizontal plane, reflecting the beauty and flatness of the angle steel 2 and the steel frame 1 after being combined.

[0039] Figure 8 A photovoltaic module is shown, which includes the above-mentioned frame module and a solar cell module laminate 8 installed in the frame module. The solar cell module laminate 8 includes a panel, a solar cell and a back panel stacked in sequence from top to bottom. The solar cell is fixed between the panel and the back panel by a packaging material. The panel and the back panel are glass.

[0040] As shown in this specification and claims, the terms "comprises" and "include" only indicate the inclusion of the steps and elements that have been clearly identified, and these steps and elements do not constitute an exclusive list, and the method or device may also include other steps or elements. The term "and / or" as used herein includes any combination of one or more of the relevant listed items.

[0041] It should be noted that, unless otherwise specified, when a feature is referred to as being “fixed” or “connected” to another feature, it may be directly fixed or connected to the other feature, or it may be indirectly fixed or connected to the other feature.

[0042] It is further understood that in the present disclosure, "plurality" refers to two or more than two, and other quantifiers are similar. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone.

[0043] It is further understood that the terms "first", "second", etc. are used to describe various information, but such information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other, and do not indicate a specific order or degree of importance. In fact, the expressions "first", "second", etc. can be used interchangeably. For example, without departing from the scope of the present disclosure, the first information can also be referred to as the second information, and similarly, the second information can also be referred to as the first information.

[0044] The above embodiment is only for illustrating the technical concept and features of the present invention, and is a preferred embodiment. Its purpose is to enable people familiar with the technology to understand the content of the present invention and implement it accordingly, and it cannot be used to limit the protection scope of the present invention. Any equivalent transformation or modification made according to the principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A frame assembly of a photovoltaic module, comprising a plurality of steel frames and a plurality of angle steels, wherein two adjacent steel frames are connected by one of the angle steels, wherein the steel frame comprises a first horizontal plate, a second horizontal plate and a third horizontal plate spaced apart from each other, wherein the steel frame further comprises a first vertical plate and a second vertical plate, wherein the first vertical plate is connected between the first horizontal plate and the second horizontal plate and a mounting groove for inserting a laminate of a solar cell module is formed between the three, wherein the mounting groove has a notch facing the right side; wherein the second vertical plate is connected between the second horizontal plate and the third horizontal plate and a connecting groove for inserting the angle steel is formed between the three, wherein the connecting groove has a notch facing the left side; wherein the The first cross plate has a first inclined portion so that the notch height of the mounting groove is smaller than the height inside the mounting groove, and the first inclined portion gradually inclines downward from left to right; the second cross plate has a second inclined portion gradually inclining downward from left to right and a flat plate portion facing the first cross plate, the second inclined portion extending downwardly from the right side edge of the flat plate portion, and the second inclined portion is located on the right side of the notch of the mounting groove; the angle steel includes a top corner portion and two connecting portions, one of which extends from the top corner portion along a first direction, and the other connecting portion extends from the top corner portion along a second direction, the angle between the first direction and the second direction is greater than 0 and less than 180 degrees, each of the connecting portions is respectively inserted into the connecting grooves of two adjacent steel frames, and each of the connecting portions respectively has an upper connecting plate connected to the second cross plate and an upper connecting plate connected to the third cross plate The top corner portion is provided with a top corner receiving groove for accommodating the top corner portions of the two steel frames, the upper end portion of the top corner portion is flush with the top surface of the steel frame, and the lower end portion of the top corner portion is flush with the bottom surface of the steel frame; the steel frame also includes a connecting edge, the connecting edge includes a second bent edge portion formed by bending from the upper left side edge of the third horizontal plate and a third bent edge portion formed by bending downward from the upper side edge of the second bent edge portion; each of the connecting parts also includes a vertical connecting plate, the vertical connecting plate is connected between the upper connecting plate and the lower connecting plate, and a notch groove for accommodating the connecting edge is formed at the connection between the vertical connecting plate and the lower connecting plate, and the thickness of the connecting edge corresponds to the depth of the notch groove.

2. The frame assembly according to claim 1, characterized in that: At least one connecting hole group is provided on the upper connecting plate, each connecting hole group includes a first hole and two second holes, the aperture of the first hole is larger than the aperture of the second hole, the line connecting the centers of the first hole and the two second holes forms a triangle, and the lower surface of the second cross plate has a plurality of protrusions corresponding to the connecting hole group, and one of the protrusions is inserted into the first hole and each of the second holes; and / or, at least one connecting hole group is provided on the lower connecting plate, each connecting hole group includes a first hole and two second holes, the aperture of the first hole is larger than the aperture of the second hole, the line connecting the centers of the first hole and the two second holes forms a triangle, and the upper surface of the third cross plate has a plurality of protrusions corresponding to the connecting hole group, and one of the protrusions is inserted into the first hole and each of the second holes.

3. The frame assembly according to claim 2, characterized in that: The triangle is an isosceles triangle, and a line connecting the centers of the two second holes is the base of the isosceles triangle.

4. The frame assembly according to claim 3, characterized in that: The diameter of the first hole is twice or more than the diameter of the second hole.

5. The frame assembly according to claim 1, characterized in that: The notch groove has a first mating surface extending upward from the lower connecting plate and a second mating surface connected between the first mating surface and the vertical connecting plate. The first mating surface and / or the second mating surface are inclined along the first direction or the second direction so that the cross-sectional area of ​​the notch groove perpendicular to the first direction or the second direction near the top corner is smaller.

6. The frame assembly according to claim 1, characterized in that: The first transverse plate further includes a first bent edge portion formed by bending leftward from the right side of the first inclined portion.

7. A photovoltaic module, comprising a frame assembly and a solar cell module laminate installed in the frame assembly, characterized in that: The frame assembly is the frame assembly according to any one of claims 1 to 6.

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