A frame structure of a photovoltaic module and a photovoltaic module

Abstract

The utility model belongs to photovoltaic technical field discloses a kind of frame structure and photovoltaic module of photovoltaic module, the frame structure of photovoltaic module includes first frame, second frame, corner sleeve and angle code, first frame has first connecting cavity;Second frame has second connecting cavity;Corner sleeve is fixedly arranged in the first connecting cavity, and the corner sleeve is provided with insertion slot;Angle code includes first connecting arm and second connecting arm, and the first connecting arm is fixedly arranged in the second connecting cavity, and the second connecting arm is inserted into the insertion slot and is fixedly connected with the corner sleeve.The utility model is by being provided with the corner sleeve and angle code of split type, and first frame and second frame are respectively carried out automatic processing, realize the modular production and storage of two frame products respectively, improve efficiency, save cost.

Description

Technical Field

[0001] This utility model relates to the field of photovoltaic technology, and more particularly to a frame structure for a photovoltaic module and a photovoltaic module. Background Technology

[0002] A photovoltaic module's frame typically consists of a pair of long frames, a pair of short frames, and four corner brackets. The long and short frames are joined at 90° at the ends using corner brackets to form a rectangular frame, providing mechanical protection and positioning for the photovoltaic module's edges.

[0003] Existing corner brackets are generally L-shaped, one-piece metal parts with rivet holes or pin holes on each of the two folded edges. During assembly, one arm of the corner bracket is inserted into the cavity of the long frame and the other arm into the cavity of the short frame, and then fixed with riveting, pins, or screws. In actual production, the long and short frames must be inserted and riveted synchronously with the corner bracket in the same positioning fixture. That is, the frames can only be produced in an "online synchronous frame assembly" manner, and the long and short frames cannot be modularly produced and stored. Utility Model Content

[0004] The purpose of this application is to provide a frame structure for a photovoltaic module and a photovoltaic module that enables modular production and storage of both long and short frames.

[0005] The technical solution provided in this application is as follows:

[0006] On the one hand, a frame structure for a photovoltaic module is provided, including:

[0007] The first frame has a first connecting cavity;

[0008] The second frame has a second connecting cavity;

[0009] An angle sleeve, fixedly disposed within the first connecting cavity, the angle sleeve being provided with a insertion groove; and

[0010] The corner bracket includes a first connecting arm and a second connecting arm. The first connecting arm is fixedly disposed in the second connecting cavity, and the second connecting arm is inserted into the insertion slot and fixedly connected to the insertion slot.

[0011] In some embodiments, the insertion slot is provided with a first snap-fit ​​portion;

[0012] The second connecting arm is provided with a second locking part;

[0013] When the second connecting arm is inserted into the insertion slot, the first snap-fit ​​part snaps into the second snap-fit ​​part to fix the corner bracket and the corner sleeve in place.

[0014] In some embodiments, the outer surface of the corner sleeve is provided with a first adhesive guide groove along the circumferential direction;

[0015] The first frame is provided with a first glue injection hole corresponding to the first glue guide groove, and the first glue injection hole is connected to the first glue guide groove;

[0016] The glue is injected through the first glue injection hole and fills the first glue guide groove to form a first glue body, so that the corner sleeve is bonded and fixed to the first connecting cavity.

[0017] In some embodiments, the first adhesive guide groove has a first step on one side along the axial direction and a second step on the other side;

[0018] The top surfaces of the first step and the second step are both higher than the bottom of the first adhesive guide groove and lower than the outer surface of the corner sleeve.

[0019] In some embodiments, a second adhesive guide groove is provided on the outer surface of the first connecting arm in the circumferential direction;

[0020] The second frame is provided with a second glue injection hole corresponding to the second glue guide groove, and the second glue injection hole is connected to the second glue guide groove;

[0021] The glue is injected through the second injection hole and fills the second glue guide groove to form a second glue, so that the first connecting arm is bonded and fixed to the second connecting cavity.

[0022] In some embodiments, the second adhesive guide groove has a third step on one side along the axial direction and a fourth step on the other side;

[0023] The top surfaces of the third step and the fourth step are both higher than the bottom of the second adhesive guide groove and lower than the outer surface of the first connecting arm.

[0024] In some embodiments, a first limiting part is provided in the first connecting cavity, and a second limiting part is provided on the outer surface of the corner sleeve. The first limiting part and the second limiting part cooperate to restrict the circumferential movement of the corner sleeve relative to the first frame.

[0025] In some embodiments, a third limiting part is provided in the second connecting cavity, and a fourth limiting part is provided on the outer surface of the first connecting arm. The third limiting part cooperates with the fourth limiting part to restrict the corner piece from moving circumferentially relative to the second frame.

[0026] In some embodiments, at least one of the materials of the first frame and the second frame comprises a mixture of polyurethane and glass fiber; and / or;

[0027] At least one of the materials of the corner sleeve and the corner bracket comprises a mixture of polyamide and short fibers.

[0028] On the other hand, a photovoltaic module is also provided, including the frame structure of the photovoltaic module described in any of the above embodiments;

[0029] After the corner bracket is connected to the corner sleeve, the overall length of the second connecting arm and the corner sleeve is L1, the length of the first connecting arm is L2, L1 is greater than L2, the first border is a long border, and the second border is a short border.

[0030] The technical advantages of this application are as follows: by setting up separate corner sleeves and corner brackets, the corner sleeves are fixedly connected to the first frame, and the first connecting arm of the corner brackets is fixedly connected to the second frame. The first frame and the corner sleeves form a finished frame product, and the second frame and the corner brackets form another finished frame product. The two finished frame products can be produced and stored separately. During assembly, it is only necessary to fix and splice the corner sleeves and corner brackets together, so as to realize the modular production and storage of the two frame products, improve efficiency, and save costs. Attached Figure Description

[0031] The present application will be further described in detail below with reference to the accompanying drawings and specific embodiments:

[0032] Figure 1 This is a schematic diagram of the frame structure of a photovoltaic module provided in one embodiment of this application;

[0033] Figure 2 This is a cross-sectional view of the frame structure of a photovoltaic module provided in an embodiment of this application;

[0034] Figure 3 This is a schematic diagram of the corner sleeve provided in one embodiment of this application;

[0035] Figure 4 This is a schematic diagram of the corner sleeve installed on the first frame according to an embodiment of this application;

[0036] Figure 5 This is a schematic diagram of the corner bracket installed on the second frame according to an embodiment of this application;

[0037] Figure 6 This is a schematic diagram of the structure of a corner bracket provided in an embodiment of this application;

[0038] Figure 7 This is a schematic diagram of the structure of the corner bracket and corner set after assembly according to an embodiment of this application;

[0039] Figure 8 This is a schematic diagram of the corner sleeve provided in one embodiment of this application from another perspective;

[0040] Figure 9 This is a schematic diagram of the structure of the corner sleeve and the first frame after assembly according to an embodiment of this application, viewed from another perspective.

[0041] Explanation of icon numbers:

[0042] 100, First frame; 110, First connecting cavity; 111, First limiting part; 120, First glue injection hole; 130, First slot; 200, Second frame; 210, Second connecting cavity; 211, Third limiting part; 220, Second glue injection hole; 230, Second slot; 300, Corner sleeve; 310, Insertion groove; 320, First snap-fit ​​part; 330, First glue guide groove; 340, First step; 350, Second step; 360, Second limiting part; 400, Corner bracket; 410, First connecting arm; 411, Second glue guide groove; 412, Third step; 413, Fourth step; 414, Fourth limiting part; 420, Second connecting arm; 421, Second snap-fit ​​part. Detailed Implementation

[0043] In the following description, specific details such as particular system architectures and techniques are set forth for illustrative purposes and not for limitation, in order to provide a thorough understanding of the embodiments of this application. However, those skilled in the art will understand that this application can also be implemented in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, apparatuses, circuits, and methods have been omitted so as not to obscure the description of this application with unnecessary detail.

[0044] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the specific implementation methods of this application will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings and other implementation methods can be obtained based on these drawings without creative effort.

[0045] To keep the drawings concise, each drawing only schematically shows the parts relevant to this application, and they do not represent the actual structure of the product. Furthermore, for ease of understanding, in some drawings, only one of the components with the same structure or function is schematically shown, or only one is labeled. In this document, "one" not only means "only one," but can also mean "more than one."

[0046] It should also be further understood that the term “and / or” as used in this application specification and the appended claims means any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0047] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linkage" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; or they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0048] In the embodiments shown in the accompanying drawings, the directional indications (such as up, down, left, right, front, and back) are relative rather than absolute when describing the structure and movement of the various components, and are not intended to limit the direction of the product during actual use.

[0049] Furthermore, in the description of this application, ordinal numbers, such as "first" and "second," are used only to distinguish related objects and should not be construed as indicating or implying the relative importance or order between related objects.

[0050] like Figures 1 to 3 As shown, in one or more embodiments, this disclosure provides a frame structure for a photovoltaic module, including a first frame 100, a second frame 200, a corner sleeve 300, and a corner bracket 400. The first frame 100 has a first connecting cavity 110; the second frame 200 has a second connecting cavity 210; the corner sleeve 300 is fixedly disposed in the first connecting cavity 110 and is provided with a insertion groove 310; the corner bracket 400 includes a first connecting arm 410 and a second connecting arm 420, the first connecting arm 410 is fixedly disposed in the second connecting cavity 210, and the second connecting arm 420 is inserted into the insertion groove 310 and fixedly connected to the corner sleeve 300.

[0051] Both the first frame 100 and the second frame 200 can be profiles extending along the length or width direction of the photovoltaic module. For example, when the first frame 100 extends along the length direction of the photovoltaic module, and the second frame 200 extends along the width direction of the photovoltaic module, the first frame 100 is a long frame and the second frame 200 is a short frame; conversely, when the first frame 100 extends along the width direction of the photovoltaic module, and the second frame 200 extends along the length direction of the photovoltaic module, the first frame 100 is a short frame and the second frame 200 is a long frame. The first frame 100 has a first connecting cavity 110 at its end, which can either penetrate the first frame 100 or be a blind hole. The second frame 200 has a second connecting cavity 210 at its end, which can either penetrate the second frame 200 or be a blind hole.

[0052] like Figure 4As shown, the corner sleeve 300 is fixedly embedded in the first connecting cavity 110. The corner sleeve 300 can be fixed in the first connecting cavity 110 by means of snap-fit, interference fit, riveting, adhesive, etc. The interior of the corner sleeve 300 is provided with an insertion groove 310 along the axial direction.

[0053] The corner bracket 400 includes a first connecting arm 410 and a second connecting arm 420. The first connecting arm 410 and the second connecting arm 420 can be integrally formed or separately formed and then fixed together. Figure 5 As shown, the first connecting arm 410 is fixedly embedded in the second connecting cavity 210. The first connecting arm 410 can be fixed in the second connecting cavity 210 by means of snap-fit, interference fit, riveting, adhesive, etc., while the second connecting arm 420 is located outside the second connecting cavity 210.

[0054] The second connecting arm 420 is set at a certain angle to the first connecting arm 410, and the angle between the first connecting arm 410 and the second connecting arm 420 is the same as the angle between the first frame 100 and the second frame 200. For example, when the first frame 100 and the second frame 200 are perpendicular to each other, the angle between the second connecting arm 420 and the first connecting arm 410 is 90 degrees. In this case, to facilitate the splicing of the first frame 100 and the second frame 200, both ends of the profile of the first frame 100 and both ends of the profile of the second frame 200 are provided with a 45-degree bevel angle to ensure a seamless splicing between the first frame 100 and the second frame 200. When the first frame 100 and the second frame 200 are spliced, the second connecting arm 420 of the corner bracket 400 is inserted into the insertion groove 310 of the corner sleeve 300. The second connecting arm 420 and the insertion groove 310 can be fixedly connected by snap-fit, interference fit, adhesive, etc., thereby achieving a fixed connection between the first frame 100 and the second frame 200.

[0055] During production, on the automatic production line of the first frame 100, the corner sleeve 300 is pushed into the fixed position of the first connecting cavity 110 of the first frame 100 by a robotic arm. When pushed in, the first frame 100 and the robotic arm cooperate to limit the position, ensuring that the corner sleeve 300 is fixed each time it is pushed into the first connecting cavity 110. Then, the corner sleeve 300 is fixedly connected to the first connecting cavity 110. Finally, the finished first frame 100 is put into storage. The finished first frame 100 has corner sleeves 300 installed at both ends. Meanwhile, on the automatic line of the second frame 200, the first connecting arm 410 of the corner bracket 400 is pushed into the second connecting cavity 210 of the second frame 200 by a robotic arm. When the second frame 200 and the second connecting arm 420 of the corner bracket 400 come into contact, it means that the first connecting arm 410 has been pushed into place. Then the first connecting arm 410 of the corner bracket 400 is fixedly connected to the second connecting cavity 210. Finally, the finished second frame 200 is put into storage. The finished second frame 200 has corner brackets 400 installed at both ends.

[0056] During assembly, the final photovoltaic module encapsulation is completed in the photovoltaic module factory. The first frame 100 and the second frame 200 are assembled into the final module by a frame assembly machine. The first frame 100 and the second frame 200 are connected by the insertion and fixing of corner sleeves 300 and corner brackets 400.

[0057] In this embodiment, by setting separate corner sleeves 300 and corner brackets 400, and by allowing the corner sleeves 300 and corner brackets 400 to be plugged in and fixed, the first frame 100 and the second frame 200 can be automatically processed and produced and stored separately. During subsequent assembly, only the corner sleeves 300 and corner brackets 400 need to be plugged in and fixed, which facilitates the modular production and storage of the finished products of the first frame 100 and the second frame 200.

[0058] In some embodiments, such as Figure 3 and Figure 6 As shown, the insertion slot 310 is provided with a first locking part 320; the second connecting arm 420 is provided with a second locking part 421; when the second connecting arm 420 is inserted into the insertion slot 310, the first locking part 320 and the second locking part 421 engage to fix the connecting bracket 400 and the corner sleeve 300. The structure after the bracket 400 and the corner sleeve 300 are inserted is as follows. Figure 7 As shown.

[0059] A first engaging portion 320 is formed on at least one side wall of the insertion groove 310. The first engaging portion 320 can be a groove or a snap-fit. A second engaging portion 421 is formed on at least one side wall of the second connecting arm 420. The second engaging portion 421 corresponds to the first engaging portion 320. The second engaging portion 421 can be a snap-fit ​​or a groove. When the second connecting arm 420 is inserted into the insertion groove 310, the second engaging portion 421 engages with the first engaging portion 320, forming an irreversible or unlockable axial anti-detachment connection, thereby achieving a fixed connection between the first frame 100 and the second frame 200.

[0060] In this embodiment, the corner bracket 400 and the corner sleeve 300 are fixedly connected by snap-fit. During assembly, only one straight insertion action is needed to fix the first frame 100 and the second frame 200. Compared with the corner bracket 400 and the corner sleeve 300 being fixedly connected by adhesive or other fixing methods, the glue application step and glue curing time are eliminated. This not only makes the assembly process simple and convenient, but also improves the assembly efficiency.

[0061] In some embodiments, such as Figure 8 As shown, the outer surface of the corner sleeve 300 is provided with a first adhesive guide groove 330 along the circumferential direction; as Figure 4As shown, a first glue injection hole 120 is provided on the first frame 100 corresponding to the first glue guide groove 330. The first glue injection hole 120 is connected to the first glue guide groove 330. Glue is injected through the first glue injection hole 120 and fills the first glue guide groove 330 to form a first colloid, so that the corner sleeve 300 is bonded and fixed to the first connecting cavity 110.

[0062] A first adhesive guide groove 330 is machined circumferentially around the outer surface of the corner sleeve 300. The width and depth of the first adhesive guide groove 330 are set according to the actual required amount of adhesive, and are not specifically limited in this embodiment. A first injection hole 120 is opened on the first frame 100 at a position corresponding to the first adhesive guide groove 330. The first injection hole 120 is a through hole, and the axis of the through hole is perpendicular to the outer surface of the corner sleeve 300. The first injection hole 120 is connected to the first adhesive guide groove 330. After the adhesive is injected from the first injection hole 120, a local adhesive pool is first formed at the bottom of the first adhesive guide groove 330, and then it spreads circumferentially along the first adhesive guide groove 330, achieving 360-degree uniform filling of the mating surface between the corner sleeve 300 and the first connecting cavity 110. This ensures that the adhesive is continuously distributed within the entire interface, eliminates local voids, and improves the connection strength between the corner sleeve 300 and the first frame 100.

[0063] The adhesive injected through the first injection hole 120 can be polyurethane weather-resistant adhesive. Polyurethane weather-resistant adhesive is a two-component room temperature curing adhesive with good thixotropy and anti-sagging properties. It is suitable for bonding vertical surfaces and can also be used to fill irregular joints. In addition, polyurethane weather-resistant adhesive has ultra-high bonding strength, excellent aging resistance, and can maintain excellent performance at low temperatures. It does not contain volatile solvents and does not produce irritating gases during the curing process. It is an important auxiliary component of the frame structure.

[0064] In this embodiment, the corner sleeve 300 and the first frame 100 are fixedly connected using polyurethane weather-resistant adhesive, replacing the conventional punching, riveting, and pin-hole connection methods. The weather-resistant adhesive has a greater adhesive peel strength, and the adhesive can flow through the first adhesive guide groove 330 to three or four adjacent surfaces to absorb the force. Compared to conventional connection methods, the product is more robust. Currently, standards require the pull-out force between the corner bracket and the frame to be ≥200N, while in this embodiment, through weather-resistant adhesive bonding, the pull-out force can reach over 500N, significantly exceeding the standard requirement.

[0065] Furthermore, in this embodiment, the first frame 100 does not require the machining of pin holes or riveting protrusions. Only a 2mm diameter injection hole needs to be opened on one side of the first frame 100. The glue is injected through an injection device, and the amount of glue can be quantitatively measured, making it easy to achieve mass production. Moreover, it causes less damage to the structure of the first frame 100 and preserves the structural strength of the first frame 100 to the greatest extent.

[0066] During production, on the first frame 100 automatic line, such as Figure 9As shown, the first frame 100 is transported flat with its B side facing down. The robotic arm pushes the corner sleeve 300 into the fixed position of the first connecting cavity 110. The glue injection device injects polyurethane weather-resistant glue into the first glue guide groove 330 between the first frame 100 and the corner sleeve 300 through the first glue injection hole 120. The amount of glue is controllable, until the glue flows fully to the upper surface and the left and right surfaces. Then the automatic line flows the first frame 100 into the next step of drying. After the glue is cured, the first frame 100 is finally finished and put into storage.

[0067] Furthermore, such as Figure 8 As shown, the first adhesive guide groove 330 has a first step 340 on one side along the axial direction and a second step 350 on the other side; the top surfaces of the first step 340 and the second step 350 are both higher than the bottom of the first adhesive guide groove 330 and lower than the outer surface of the corner sleeve 330, so as to prevent the adhesive in the first adhesive guide groove 330 from overflowing to the outer surface of the corner sleeve 300.

[0068] The first step 340 is located on one axial side of the first adhesive guide groove 330 (e.g., the side near the end face of the first frame 100), forming a 0.3-0.5mm step with the bottom of the first adhesive guide groove 330. The second step 350 is located on the other axial side of the first adhesive guide groove 330 (the side away from the end face of the first frame 100), also forming a 0.3-0.5mm step with the bottom of the first adhesive guide groove 330. The top surfaces of both the first step 340 and the second step 350 are 0.1-0.2mm lower than the outer surface of the corner sleeve 300, and the heights of the first step 340 and the second step 350 can be approximately the same. The outer surface of the corner sleeve 300, the first step 340, and the first adhesive guide groove 330 form a three-level height difference, with the bottom height of the first adhesive guide groove 330 < the top surface height of the first step 340 < the outer surface height of the corner sleeve 300. Similarly, the outer surface of the corner sleeve 300, the second step 350 and the first adhesive guide groove 330 also form a three-level height difference, with the bottom height of the first adhesive guide groove 330 < the top surface height of the second step 350 < the outer surface height of the corner sleeve 300.

[0069] The height of the first step 340 and the second step 350 is lower than the outer surface of the corner sleeve 300 and higher than the bottom of the first adhesive guide groove 330. When adhesive overflows from the first adhesive guide groove 330, it can flow to the top surfaces of the first step 340 and the second step 350, where the overflowing adhesive is contained, preventing it from overflowing onto the outer surface of the corner sleeve 300. Furthermore, the first adhesive guide groove 330 is located between the first step 340 and the second step 350, that is, it is positioned in the middle of the corner sleeve 300, away from the connection point between the first frame 100 and the second frame 200, and the first frame 100 and the second frame 200 fit tightly together to prevent adhesive leakage.

[0070] In some embodiments, such as Figure 6 As shown, the outer surface of the first connecting arm 410 is provided with a second adhesive guide groove 411 along the circumferential direction; as Figure 5 As shown, a second glue injection hole 220 is provided on the second frame 200 corresponding to the second glue guide groove 411. The second glue injection hole 220 is connected to the second glue guide groove 411. Glue is injected through the second glue injection hole 220 and fills the second glue guide groove 411 to form a second colloid, so that the first connecting arm 410 and the second connecting cavity 210 are bonded and fixed.

[0071] A second adhesive guide groove 411 is machined around the circumference of the outer surface of the corner bracket 400. The width and depth of the second adhesive guide groove 411 are set according to the actual required amount of adhesive, and are not specifically limited in this embodiment. A second adhesive injection hole 220 is opened on the second frame 200 at a position corresponding to the second adhesive guide groove 411. The second adhesive injection hole 220 is a through hole and communicates with the second adhesive guide groove 411. After the adhesive is injected from the second adhesive injection hole 220, a local adhesive pool is first formed on the surface opposite to the second adhesive injection hole 220 at the bottom of the second adhesive guide groove 411. Then, it spreads circumferentially along the second adhesive guide groove 411, achieving 360-degree uniform filling of the mating surface between the corner bracket 400 and the second connecting cavity 210. This ensures that the adhesive is continuously distributed within the entire interface, eliminates local voids, and improves the connection strength between the corner bracket 400 and the second frame 200. Of course, adhesive can be filled only on one surface of the bottom of the second adhesive guide groove 411, or adhesive can be filled on three surfaces of the bottom of the second adhesive guide groove 411, one of which is the surface of the bottom of the second adhesive guide groove 411 opposite to the second injection hole 220, and the other two surfaces are perpendicular to this surface. This application is not limited to this, and the filling range of adhesive can be selected according to actual needs. In this embodiment, the adhesive injected from the first injection hole 120 can also be polyurethane weather-resistant adhesive to improve the bonding strength between the corner bracket 400 and the second frame 200.

[0072] During production, on the automatic production line for the second frame 200, the second frame 200 is conveyed flat with its B-side facing upwards. The robotic arm pushes the corner bracket 400 into the second connecting cavity 210 and positions it. The process stops when the second frame 200 and the second connecting arm 420 of the corner bracket 400 come into contact, ensuring that the corner bracket 400 is pushed into place. The glue injection equipment injects polyurethane weather-resistant glue into the second glue guide groove 411 between the second frame 200 and the corner bracket 400 through the second glue injection hole 220. The amount of glue is controllable, ensuring that the glue flows fully to the upper and left and right surfaces. Then, the automatic line flows the second frame 200 into the next drying step, completing the process after the glue has cured. Finally, the finished second frame 200 is put into storage.

[0073] Furthermore, such as Figure 5As shown, the second adhesive guide groove 411 has a third step 412 on one side along the axial direction and a fourth step 413 on the other side; the top surfaces of the third step 412 and the fourth step 413 are both higher than the bottom of the second adhesive guide groove 411 and lower than the outer surface of the first connecting arm 410, so as to prevent the adhesive in the second adhesive guide groove 411 from overflowing to the outer surface of the first connecting arm 410.

[0074] Similarly, the heights of the third step 412 and the fourth step 413 are lower than the outer surface of the first connecting arm 410 and higher than the bottom of the second adhesive guide groove 411. When adhesive overflows from the second adhesive guide groove 411, it can flow to the top surfaces of the third step 412 and the fourth step 413, where the overflowing adhesive is contained, preventing it from overflowing onto the outer surface of the first connecting arm 410. Furthermore, in this embodiment, the second adhesive guide groove 411 is also located in the middle of the first connecting arm 410, away from the connection point between the first frame 100 and the second frame 200, and the first frame 100 and the second frame 200 fit tightly together to prevent adhesive leakage.

[0075] In some embodiments, such as Figure 3 and Figure 4 As shown, a first limiting part 111 is provided in the first connecting cavity 110, and a second limiting part 360 is provided on the outer surface of the corner sleeve 300. The first limiting part 111 and the second limiting part 360 cooperate to restrict the circumferential movement of the corner sleeve 300 relative to the first frame 100.

[0076] The first limiting part 111 is formed on the inner wall of the first connecting cavity 110, and can be a rib or groove extending axially, with the rib having a rectangular or trapezoidal cross-section. Multiple first limiting parts 111 can be provided, spaced apart circumferentially along the first connecting cavity 110. A second limiting part 360 is correspondingly provided on the outer surface of the corner sleeve 300, and is a groove or rib complementary to the first limiting part 111. When the corner sleeve 300 enters the first connecting cavity 110, the second limiting part 360 and the first limiting part 111 form an axial sliding fit, allowing the corner sleeve 300 to slide axially into the first connecting cavity 110. The mutual engagement of the first limiting part 111 and the second limiting part 360 restricts the corner sleeve 300 from rotating circumferentially relative to the first frame 100, allowing the corner sleeve 300 to only be inserted or removed axially.

[0077] In some embodiments, such as Figure 5 and Figure 6 As shown, a third limiting part 211 is provided in the second connecting cavity 210, and a fourth limiting part 414 is provided on the outer surface of the first connecting arm 410. The third limiting part 211 and the fourth limiting part 414 cooperate to restrict the corner code 400 from moving circumferentially relative to the second frame 200.

[0078] The third limiting part 211 is formed on the inner wall of the second connecting cavity 210, and can be a rib or groove extending axially, with the rib having a rectangular or trapezoidal cross-section. Multiple third limiting parts 211 can be provided, spaced apart circumferentially along the second connecting cavity 210. A fourth limiting part 414 is correspondingly provided on the outer surface of the first connecting arm 410, and is a groove or rib complementary to the third limiting part 211. When the first connecting arm 410 enters the second connecting cavity 210, the fourth limiting part 414 and the third limiting part 211 form an axial sliding fit, allowing the first connecting arm 410 of the corner bracket 400 to slide axially into the second connecting cavity 210. The mutual engagement of the fourth limiting part 414 and the third limiting part 211 restricts the corner bracket 400 from rotating circumferentially relative to the second frame 200, allowing the corner bracket 400 to only be inserted or removed axially.

[0079] In some embodiments, the first frame 100 and / or the second frame 200 are made of glass fiber reinforced polyurethane composite material. The first frame 100 and the second frame 200 are formed by thermosetting pultrusion. The two ends of the pultruded profile are cut at a 45° bevel and injection holes are drilled. No further punching, riveting, or pin hole processing is required, making the process simpler. The profile cross-section can be designed and matched as needed, and is not limited to a certain cross-section. The corner sleeve 300 and / or the corner bracket 400 are made of short glass fiber reinforced polyamide composite material, such as PA6+GF30 (polyamide + short fiber). The corner sleeve 300 and the corner bracket 400 are made by injection molding, which is a simple process.

[0080] In this embodiment, the first frame 100, the second frame 200, the corner sleeve 300, and the corner bracket 400 are all made of composite materials, which makes them more resistant to corrosion and salt spray in special environments and can be used for photovoltaic modules in coastal or highly corrosive factories.

[0081] This application also provides an embodiment of a photovoltaic module, including a photovoltaic module body and a frame structure of the photovoltaic module as described in any of the above embodiments, such as... Figure 2 As shown, after the corner bracket 400 and corner sleeve 300 are connected, the overall length of the second connecting arm 420 and corner sleeve 300 is L1, and the length of the first connecting arm 410 is L2, where L1 is greater than L2. The first border 100 is the long border, and the second border 200 is the short border. The overall length of the second connecting arm 420 after connecting with the corner sleeve 300 is relatively long; placing it within the longer first border 100 helps improve the connection strength between the two. Figure 1As shown, the first frame 100 has a first slot 130 for mounting the photovoltaic module body. The second frame 200 has a second slot 230 for mounting the photovoltaic module body. One edge of the photovoltaic module body is secured in the first slot 130, and the other adjacent edge of the photovoltaic module body is secured in the second slot 230, so as to fix the frame structure to the four edges of the photovoltaic module body and protect the photovoltaic module body.

[0082] In the above embodiments, the descriptions of each embodiment have different focuses. For parts that are not described in detail or recorded in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0083] It should be noted that the above embodiments can be freely combined as needed. The above description is only a preferred embodiment of this application. It should be pointed out that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this application, and these improvements and modifications should also be considered within the protection scope of this application.

Claims

1. A frame structure for a photovoltaic module, characterized in that, include: The first frame has a first connecting cavity; The second frame has a second connecting cavity; An angle sleeve is fixedly installed inside the first connecting cavity, and the angle sleeve is provided with a plug-in groove; and The corner bracket includes a first connecting arm and a second connecting arm. The first connecting arm is fixedly disposed in the second connecting cavity, and the second connecting arm is inserted into the insertion slot and fixedly connected to the corner sleeve.

2. The frame structure of a photovoltaic module according to claim 1, characterized in that, The insertion slot is provided with a first snap-fit ​​part; The second connecting arm is provided with a second locking part; When the second connecting arm is inserted into the insertion slot, the first snap-fit ​​part snaps into the second snap-fit ​​part to fix the corner bracket and the corner sleeve in place.

3. The frame structure of a photovoltaic module according to claim 1, characterized in that, The outer surface of the corner sleeve is provided with a first adhesive guide groove along the circumferential direction; The first frame is provided with a first glue injection hole corresponding to the first glue guide groove, and the first glue injection hole is connected to the first glue guide groove; The glue is injected through the first glue injection hole and fills the first glue guide groove to form a first glue body, so that the corner sleeve is bonded and fixed to the first connecting cavity.

4. The frame structure of a photovoltaic module according to claim 3, characterized in that, The first adhesive guide groove has a first step on one side along the axial direction and a second step on the other side; The top surfaces of the first step and the second step are both higher than the bottom of the first adhesive guide groove and lower than the outer surface of the corner sleeve.

5. A frame structure for a photovoltaic module according to any one of claims 1-4, characterized in that, The outer surface of the first connecting arm is provided with a second adhesive guide groove along the circumferential direction; The second frame is provided with a second glue injection hole corresponding to the second glue guide groove, and the second glue injection hole is connected to the second glue guide groove; The glue is injected through the second injection hole and fills the second glue guide groove to form a second glue, so that the first connecting arm is bonded and fixed to the second connecting cavity.

6. The frame structure of a photovoltaic module according to claim 5, characterized in that, The second adhesive guide groove has a third step on one side along the axial direction and a fourth step on the other side; The top surfaces of the third step and the fourth step are both higher than the bottom of the second adhesive guide groove and lower than the outer surface of the first connecting arm.

7. The frame structure of a photovoltaic module according to claim 1, characterized in that, The first connecting cavity is provided with a first limiting part, and the outer surface of the corner sleeve is provided with a second limiting part. The first limiting part and the second limiting part cooperate to restrict the circumferential movement of the corner sleeve relative to the first frame.

8. The frame structure of a photovoltaic module according to claim 1, characterized in that, The second connecting cavity is provided with a third limiting part, and the outer surface of the first connecting arm is provided with a fourth limiting part. The third limiting part cooperates with the fourth limiting part to restrict the corner piece from moving circumferentially relative to the second frame.

9. The frame structure of a photovoltaic module according to claim 1, characterized in that, At least one of the materials of the first frame and the second frame comprises a mixture of polyurethane and glass fiber; and / or, At least one of the materials of the corner sleeve and the corner bracket comprises a mixture of polyamide and short fibers.

10. A photovoltaic module, characterized in that, Includes the frame structure of the photovoltaic module as described in any one of claims 1-9; After the corner bracket is connected to the corner sleeve, the overall length of the second connecting arm and the corner sleeve is L1, the length of the first connecting arm is L2, L1 is greater than L2, the first border is a long border, and the second border is a short border.

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