Photovoltaic frame connection assembly, photovoltaic assembly

Abstract

The present disclosure discloses a photovoltaic frame connecting assembly and a photovoltaic assembly, and belongs to the technical field of photovoltaic frames and photovoltaic assemblies. The photovoltaic frame connecting assembly comprises a photovoltaic frame and a corner code. The photovoltaic frame comprises a through hole. The corner code comprises a connecting column, and the connecting column is connected to the through hole. Along a first direction, the maximum width of the connecting column is W1, and the maximum width of the through hole is W, and W1≤W is satisfied. Along a second direction, the maximum length of the connecting column is L1, the minimum length of the connecting column is L2, and the length of the through hole is L, and L2L1≤L, L1>0, and the first direction intersects the second direction. The present disclosure can realize the connection of the photovoltaic frame and the corner code.

Description

Technical Field

[0001] This disclosure pertains to the field of photovoltaic frames and photovoltaic modules, and particularly relates to photovoltaic frame connection components and photovoltaic modules. Background Technology

[0002] Photovoltaic modules typically include a photovoltaic laminate and multiple photovoltaic frames disposed around the periphery of the photovoltaic laminate. Adjacent photovoltaic frames can be connected via corner brackets. Generally, the photovoltaic frame can have a receiving cavity extending along its length, and the corner bracket can include a plug-in rod for inserting into the receiving cavity. During assembly of the corner bracket and the photovoltaic frame, the plug-in rod enters the receiving cavity along its extension direction, and the corner bracket and the photovoltaic frame are connected by the snap-fit ​​action between the plug-in rod and the inner wall of the receiving cavity, thereby realizing the assembly between adjacent photovoltaic frames.

[0003] However, in the above connection methods, the insertion rod usually needs to be simultaneously introduced and locked during its entry into the receiving cavity, making it difficult to balance the force exerted during insertion with the stability of the connection after assembly. When the locking force between the insertion rod and the receiving cavity is large, it can easily lead to significant friction and compressive forces during insertion, making corner bracket assembly difficult and potentially causing damage to the connection points. Conversely, when the locking force is small, the connection between the insertion rod and the receiving cavity can easily become weak, resulting in loosening or relative movement during long-term use. Therefore, it is necessary to improve the connection method between the corner bracket and the photovoltaic frame to make it easier to assemble the corner bracket onto the photovoltaic frame. Summary of the Invention

[0004] This disclosure proposes a photovoltaic frame connection component and a photovoltaic module to at least partially solve the technical problems of difficult corner bracket assembly, loose connection, or relative movement that easily occur when connecting corner brackets between photovoltaic frames and corner brackets. This disclosure ensures convenient assembly and reliable connection between the corner bracket and the photovoltaic frame by setting through holes in the photovoltaic frame and connecting posts in the corner brackets, allowing the connecting posts to connect with the through holes. To achieve the objectives of this disclosure, the technical solution is as follows: In a first aspect, a photovoltaic frame connection component includes: A photovoltaic frame, the photovoltaic frame including through holes; Angle code, the angle code including a connecting post, the connecting post being connected to the through hole; Along the first direction, the maximum width of the connecting post is W1, and the maximum width of the through hole is W, satisfying: W1≤W; along the second direction, the maximum length of the connecting post is L1, the minimum length of the connecting post is L2, and the length of the through hole is L, satisfying: L2<L1≤L, L1>0, and the first direction intersects the second direction.

[0005] According to one aspect of the present disclosure, the volume of the connecting post is N, and the volume of the cavity defined by the through hole is M, satisfying: 0.375≤N / M<0.8.

[0006] According to one aspect of the embodiments of this disclosure, 0.45 ≤ N / M ≤ 0.55; or, 0.45 ≤ N / M ≤ 0.52.

[0007] According to one aspect of the present disclosure, the connecting post includes an inclined surface that extends obliquely from a position where the connecting post has the maximum value L1 to a position where it has the minimum value L2, and the inclined surface is at least partially located within the through hole; Projecting along a third direction, the projected length of the inclined surface is R, and the diagonal length of the through hole is S, satisfying: , 0.90 < R / S ≤ 1, the third direction intersects the plane defined by the first direction and the second direction.

[0008] According to one aspect of the embodiments of this disclosure, 0.4 < N / M*R / S < 0.6.

[0009] According to one aspect of the present disclosure, the third direction, the first direction, and the second direction are perpendicular to each other; the through hole is a cylindrical hole, a cuboid hole, or a cubic hole; 0.951≤R / S≤0.998; or, 0.428≤N / M*R / S≤0.549; or 0.8≤W1 / W≤1.

[0010] According to one aspect of the present disclosure, the first direction is perpendicular to the second direction, and one or two corner brackets are provided; and / or, the inclined surface is a plane, W1=W, and the entire inclined surface is located within the through hole; and / or, 2mm≤L≤5mm, 5mm≤W≤14mm; and / or, 0mm≤L2≤1mm, 2mm≤L1≤5mm.

[0011] According to one aspect of the present disclosure, the corner bracket is formed of a plastic material at least at the connecting post, and the photovoltaic frame is formed of a polyurethane glass fiber composite material at least; the Shore D hardness of the connecting post is H1, and the Shore D hardness of the photovoltaic frame is H2, satisfying: 0.3 ≤ H1 / H2 < 0.8.

[0012] According to one aspect of the present disclosure, the photovoltaic frame includes a receiving cavity, and the through hole communicates with the receiving cavity; the corner bracket includes a first plug-in portion, a second plug-in portion, and a plurality of connecting posts arranged intersectingly, the plurality of connecting posts including a first connecting post and a second connecting post, the first connecting post protruding from the first plug-in portion in a direction away from the first plug-in portion, and the second connecting post protruding from the second plug-in portion in a direction away from the second plug-in portion; the first plug-in portion is inserted into and at least partially contacts the receiving cavity, and the first connecting post at least partially extends into the through hole; or, the second plug-in portion is inserted into and at least partially contacts the receiving cavity, and the second connecting post at least partially extends into the through hole.

[0013] In a second aspect, a photovoltaic module includes two first photovoltaic frames, two second photovoltaic frames, four corner brackets, and a photovoltaic laminate. The two first photovoltaic frames, the two second photovoltaic frames, and the four corner brackets are connected to form a frame, and the frame is connected to the photovoltaic laminate. The first photovoltaic frames and the corner brackets are connected to form a first photovoltaic frame connecting assembly, which is the photovoltaic frame connecting assembly described in any one of the first aspects above. Alternatively, the second photovoltaic frames and the corner brackets are connected to form a second photovoltaic frame connecting assembly, which is the photovoltaic frame connecting assembly described in any one of the first aspects above.

[0014] Compared to the prior art, the beneficial effects achieved by this disclosure are as follows: (1) By setting through holes on the photovoltaic frame and setting connecting posts on the corner brackets that are connected to the through holes, the connecting posts can extend into the through holes and form a connection limit after the plug-in part of the corner bracket enters the receiving cavity of the photovoltaic frame. Thus, the plug-in part mainly undertakes the guiding function, and the connecting posts and through holes mainly undertake the connection and anti-removal functions, reducing or avoiding the mutual influence between the plug-in process and the locking process, and ensuring the ease of assembly of the corner brackets.

[0015] (2) By setting the structural relationship between the connecting post and the through hole in different directions, and limiting the ratio between the volume of the connecting post and the volume of the cavity defined by the through hole, the corresponding space can be reserved for the connecting post to enter the through hole and generate local deformation. At the same time, the connecting post has sufficient solid structure to form contact, support or position restriction with the through hole. By setting an inclined surface on the connecting post and limiting the ratio between the projected length of the inclined surface and the diagonal length of the through hole, the connecting post can be gradually introduced when entering the through hole. Furthermore, by making the corner bracket at least at the connecting post form a plastic material and the photovoltaic frame form a polyurethane glass fiber composite material, and making the Shore D hardness of the two meet the preset ratio, the connecting post can generate local compliance during the assembly process, while maintaining the hardness required to form a stable connection. This reduces the assembly resistance between the photovoltaic frame and the corner bracket and the possibility of the connecting post, the edge of the through hole or the photovoltaic frame being squeezed, scratched or damaged locally, thereby improving the assembly compatibility and connection reliability between the corner bracket and the photovoltaic frame. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this disclosure, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only one or more embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the structure of a photovoltaic frame connection assembly according to an embodiment of the present disclosure. Figure 1 ; Figure 2 This is a schematic diagram of the structure of a photovoltaic frame connection assembly according to an embodiment of the present disclosure. Figure 2 ; Figure 3 This is a schematic diagram of the connecting post and through hole according to an embodiment of the present disclosure; Figure 4 This is a schematic diagram of the structure of a photovoltaic frame connection assembly according to another embodiment of the present disclosure. Figure 1 ; Figure 5 This is a schematic diagram of the structure of a photovoltaic frame connection assembly according to another embodiment of the present disclosure. Figure 2 ; Figure 6 This is a schematic diagram of the connecting post and through hole according to another embodiment of the present disclosure; Figure 7 This is a schematic diagram of the connecting post and through hole according to another embodiment of the present disclosure; Figure 8 This is a schematic diagram of the connecting post and through hole according to another embodiment of the present disclosure; The accompanying drawings are provided to further understand this disclosure and form part of the specification. They are used together with the embodiments of this disclosure to explain this disclosure and do not constitute a limitation thereof. Detailed Implementation

[0018] The technical solutions of the present disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present disclosure, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present disclosure without creative effort are within the scope of protection of the present disclosure.

[0019] In the description of the embodiments of this disclosure, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this disclosure, "multiple" means one, two, or more, unless otherwise explicitly defined.

[0020] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this disclosure. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0021] In the description of the embodiments of this disclosure, technical terms such as "center," "longitudinal," "transverse," "length," "width," "wall thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this disclosure and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have or completely have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this disclosure.

[0022] In the description of the embodiments of this disclosure, unless otherwise expressly specified and limited, the technical terms "installation," "connection," "joining," "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. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this disclosure according to the specific circumstances.

[0023] In the accompanying drawings corresponding to the embodiments of this disclosure, the wall thickness and area of ​​the layers are enlarged for better understanding and ease of description. When describing a component on or on the surface of another component, the component may be "directly" located on the surface of the other component, or there may be a third component between the two components. Conversely, when describing a component on the surface of another component, or when another component is formed or disposed on the surface of a component, it indicates that there is no third component between the two components. Furthermore, when describing a component as being "generally" formed on another component, it means that the component is not formed on the entire surface (or front surface) of the other component, nor is it formed on a portion of the edge of the entire surface.

[0024] In the description of embodiments of this disclosure, when a component “includes” another component, other components are not excluded unless otherwise stated, and other components may be further included.

[0025] The terminology used in the description of the various embodiments herein is for the purpose of describing particular embodiments only and is not intended to be limiting. As used in the description of the various embodiments and the appended claims, the term "component" is also intended to include the plural form unless the context clearly indicates otherwise.

[0026] The embodiments of this disclosure will now be described in detail with reference to the accompanying drawings. However, those skilled in the art will understand that many technical details have been provided in the embodiments of this disclosure to facilitate a better understanding of the disclosure. However, the technical solutions claimed in this disclosure can be implemented even without these technical details and various variations and modifications based on the following embodiments.

[0027] Firstly, such as Figures 1 to 6As shown, a photovoltaic frame connection assembly includes: a photovoltaic frame 100, the photovoltaic frame 100 including a through hole 101; a corner bracket 200, the corner bracket 200 including a connecting post 230, the connecting post 230 connecting the through hole 101; along a first direction, the maximum width of the connecting post 230 is W1, the maximum width of the through hole 101 is W, satisfying: W1≤W; along a second direction, the maximum length of the connecting post 230 is L1, the minimum length of the connecting post 230 is L2, the length of the through hole 101 is L, satisfying: L2<L1≤L, L1>0, the first direction intersects the second direction.

[0028] In one or more embodiments of this disclosure, the photovoltaic frame 100 can be a frame profile used to connect photovoltaic laminates, support the edges of photovoltaic laminates, or form an outer support structure for photovoltaic modules, and the first direction is the length direction of the photovoltaic frame, for example... Figure 1 The first direction is the X-direction, and the second direction is the width direction of the photovoltaic frame, for example... Figure 1 In the Y-direction. The photovoltaic frame 100 can be formed of metallic materials, composite materials, or other materials with structural load-bearing capacity. Preferably, the photovoltaic frame 100 can be formed of at least glass fiber polyurethane composite material. Of course, the specific material of the photovoltaic frame 100 can be reasonably selected or set by those skilled in the art based on the structural strength, weather resistance, insulation, and operating environment of the photovoltaic module, and this disclosure does not limit it in this regard.

[0029] In one or more embodiments of this disclosure, the corner bracket 200 can be at least partially inserted into the interior of the photovoltaic frame 100 and connected to the through hole 101 via the connecting post 230 to restrict relative movement between the corner bracket 200 and the photovoltaic frame 100, and also to achieve connection between the corner bracket and the photovoltaic frame 100. Multiple corner brackets 200 can be provided, for example, one or two. The corner bracket 200 can be formed of a plastic material, such as polyamide, polypropylene, polycarbonate, polyoxymethylene, polybutylene terephthalate, or modified materials of the above. Of course, the corner bracket 200 can also be formed of other materials capable of producing predetermined deformation while maintaining structural strength; this disclosure does not limit this.

[0030] In one or more embodiments of this disclosure, the connecting post 230 connects to the through hole 101. This can be understood as the connecting post 230 at least partially entering the through hole 101 and forming a contact, snap-fit, or other connection relationship with the hole wall and / or edge of the through hole 101 that can restrict the relative movement of the corner bracket 200 and the photovoltaic frame 100. The connecting post 230 may be entirely located within the through hole 101 or partially located within the through hole 101. Preferably, the connecting post 230 may be entirely located within the through hole 101 to reduce the height of the connecting post 230 protruding from the outer surface of the photovoltaic frame 100, thereby reducing the possibility of the connecting post 230 being damaged by external impacts, scratches, or environmental effects.

[0031] In one or more embodiments of this disclosure, the first direction may be the width direction of the through hole 101 or the connecting post 230, and the second direction may be the length direction of the through hole 101 or the connecting post 230, with the first direction intersecting the second direction. Preferably, the first direction may be perpendicular to the second direction. Of course, the first direction and the second direction may also form an acute angle or an obtuse angle. Those skilled in the art can make reasonable selections or arrangements based on the shape and orientation of the through hole 101 and the connecting post 230, and this disclosure does not limit this.

[0032] In one or more embodiments of this disclosure, along the first direction, the maximum width of the connecting post 230 is W1, and the maximum width of the through hole 101 is W. The maximum width W1 of the connecting post 230 can be understood as the maximum distance between the two outermost positions of the connecting post 230 along the first direction when the connecting post 230 is not subjected to external force or is connected to the frame. The maximum width W of the through hole 101 can be understood as the maximum distance between the two hole wall positions of the through hole 101 that are opposite to each other along the first direction.

[0033] In one or more embodiments of this disclosure, W1 and W can be values ​​measured in millimeters for the corresponding widths, and both W1 and W can be dimensionless values ​​used in the relational calculations. In other words, in this disclosure, W1 represents the maximum width of the connecting post 230 measured in millimeters along the first direction, and W represents the maximum width of the through hole 101 measured in millimeters along the first direction.

[0034] In one or more embodiments of this disclosure, W1 ≤ W, that is, the maximum width of the connecting post 230 along the first direction is not greater than the maximum width of the through hole 101 along the first direction. By making W1 ≤ W, the connecting post 230 can have the dimensional conditions to enter the through hole 101 in the first direction, reducing excessive interference, compression, or jamming between the connecting post 230 and the hole wall of the through hole 101 due to excessive width during the process of the connecting post 230 entering the through hole 101.

[0035] In one or more embodiments of this disclosure, the maximum width W of the through hole is, exemplarily, 5-14 mm (i.e., 5 mm ≤ W ≤ 14 mm), for example, 5 mm, 6 mm, 7 mm, 8 mm, 9 mm, 10 mm, 11 mm, 12 mm, 13 mm, 14 mm. W1 / W can be greater than 0 and less than or equal to 1. Exemplarily, W1 / W can be 0.7, 0.75, 0.8, 0.85, 0.9, 0.95, 1, or a range of any two values. Preferably, W1 = W, so that the maximum width of the connecting post 230 along the first direction is equal to the maximum width of the through hole 101 along the first direction, thereby ensuring that the connecting post 230 can enter the through hole 101 while reducing the shaking or movement of the connecting post 230 relative to the through hole 101 along the first direction.

[0036] In one or more embodiments of this disclosure, the length of the connecting post 230 along the second direction can be measured at different locations along the first direction. The lengths of the connecting post 230 along the second direction at different locations may not be exactly the same or may be different. When the lengths of the connecting post 230 along the second direction at different locations are different, the largest length is the maximum length L1 of the connecting post 230, and the smallest length is the minimum length L2 of the connecting post 230.

[0037] Specifically, multiple measurement positions can be selected on the connecting post 230 along the first direction. At each measurement position, the distance between two boundary positions of the connecting post 230 set opposite each other along the second direction is measured. The maximum value among the lengths measured at the multiple measurement positions is determined as the maximum length L1, and the minimum value among the lengths measured at the multiple measurement positions is determined as the minimum length L2. That is to say, the maximum length L1 and the minimum length L2 can be used to characterize the range of dimensional changes of the connecting post 230 along the second direction as it extends along the first direction.

[0038] In one or more embodiments of this disclosure, the length of the connecting post 230 along the second direction may also vary in the form of a curve, a broken line, a step, or other forms, and is not limited to a continuous variation along a straight line. The maximum length position and the minimum length position of the connecting post 230 may be located at the two ends of the connecting post 230 along the first direction, or they may be located in the middle region of the connecting post 230 along the first direction, and this disclosure does not limit this.

[0039] In one or more embodiments of this disclosure, the length of the through hole 101 along the second direction is L. The length L of the through hole 101 can be understood as the distance between two opposite edges of the through hole 101 along the second direction. Preferably, the through hole 101 can be a cylindrical hole, a cuboid hole, a cube hole, an elliptical hole, an oblong hole, or a hole of other shapes.

[0040] For example, when the through hole 101 is a cylindrical hole, W and L can be the diameter of the through hole 101 along the first direction and the length of the through hole 101 along the second direction, respectively; when the through hole 101 is a cuboid hole or a cube hole, W and L can be the side lengths of the through hole 101 along the first direction and the second direction, respectively; when the through hole 101 is an irregularly shaped hole, W and L can be the maximum projected dimensions of the through hole 101 along the first direction and the second direction, respectively.

[0041] In one or more embodiments of this disclosure, L1, L2, and L can be numerical values ​​measured in millimeters for their respective lengths, and L1, L2, and L can all be dimensionless values ​​used in the relational calculations. In other words, in this disclosure, L1 represents the maximum length of the connecting post 230 measured in millimeters along the second direction, L2 represents the minimum length of the connecting post 230 measured in millimeters along the second direction, and L represents the length of the through hole 101 measured in millimeters along the second direction.

[0042] In one or more embodiments of this disclosure, L2 < L1 ≤ L, that is, the length of the through hole 101 along the second direction is not less than the minimum length of the connecting post 230, and is not less than the maximum length of the connecting post 230.

[0043] In this disclosure, by making L2 < L1, the area of ​​the connecting post 230 with a minimum length L2 can be made to have the size conditions to facilitate entry into the photovoltaic frame. The side of the connecting post 230 with a minimum length L2 can play a guiding role in the connection process between the connecting post 230 and the photovoltaic frame 100, reducing the possibility of the connecting post 230 getting completely stuck with the end of the photovoltaic frame when entering the photovoltaic frame 100.

[0044] Meanwhile, by ensuring L1≤L, the connecting post 230 can have a region whose length along the second direction is greater than or equal to the length L of the through hole 101. When the connecting post 230 is connected to the through hole 101, the hole wall or edge of the through hole 101 can form contact, snap-fit, or position restriction on the corresponding region of the connecting post 230, thereby reducing the possibility of the connecting post 230 detaching from the through hole 101.

[0045] In one or more embodiments of this disclosure, L2 / L can be greater than or equal to 0 and less than or equal to 1, and L1 / L can be greater than 0 and less than or equal to 1. Exemplarily, L2 / L can be 0, 0.1, 0.2, 0.3, 0.35, or a range of any two values; L / L1 can be 0.45, 0.5, 0.55, 0.6, 0.65, 0.7, 0.75, 0.8, 0.85, 0.9, 0.95, 1, or a range of any two values. L2 / L and L / L1 can be combined to take values ​​according to actual needs. Of course, L2 / L and L / L1 can also be other values ​​or other ranges of values, and this disclosure does not limit them.

[0046] In one or more embodiments of this disclosure, preferably, L1=L. That is, the maximum length of the connecting post 230 along the second direction is equal to the length of the through hole 101 along the second direction. When L1=L, the maximum length region of the connecting post 230 can match the size of the through hole 101 along the second direction, so that the connecting post 230 can be fully or substantially fully accommodated within the through hole 101, and a relatively stable contact or limiting relationship is formed between the connecting post 230 and the hole wall of the through hole 101.

[0047] For example, the maximum length L1 of the connecting post 230 ranges from 2 to 5 mm (i.e., 2 mm ≤ L1 ≤ 5 mm), such as 2 mm, 2.1 mm, 2.2 mm, 2.3 mm, 2.4 mm, 2.5 mm, 2.6 mm, 2.7 mm, 2.8 mm, 2.9 mm, 3 mm, 3.1 mm, 3.2 mm, 3.3 mm, 3.4 mm, 3.5 mm, 3.6 mm, 3.7 mm, 3.8 mm, 3.9 mm, 4 mm, 4.1 mm, 4.2 mm, 4.3 mm, 4.4 mm, 4.5 mm, 4.6 mm, 4.7 mm, 4.8 mm, 4.9 mm, 5 mm, or any pairwise value range. The minimum length L2 of the connecting post 230 is 0 to 1 mm (i.e., 0 mm ≤ L2 ≤ 1 mm), such as 0 mm, 0.1 mm, 0.2 mm, 0.3 mm, etc. The length L of the through hole 101 along the second direction can be 2-5mm, such as 2mm, 2.1mm, 2.2mm, 2.3mm, 2.4mm, 2.5mm, 2.6mm, 2.7mm, 2.8mm, 2.9mm, 3mm, 3.1mm, 3.2mm, 3.3mm, 3.4mm, 3.5mm, 3.6mm, 3.7mm, 3.8mm, 3.9mm, 4mm, 4.1mm, 4.2mm, 4.3mm, 4.4mm, 4.5mm, 4.6mm, 4.7mm, 4.8mm, 4.9mm, 5mm, or any pair of values, which can satisfy L2 < L1 ≤ L. Preferably, L1 = L. In this way, the side of the connecting post 230 with a shorter length can easily enter the photovoltaic frame 100, and the area of ​​the connecting post 230 with a maximum length can be dimensionally matched with the hole wall of the through hole 101 along the second direction.

[0048] In this disclosure, by ensuring that the maximum width W1 of the connecting post 230 is no greater than the maximum width W of the through hole 101, and by ensuring that the length L of the through hole 101 is between the minimum length L2 and the maximum length L1 of the connecting post 230, the connecting post 230 can have the width to enter the photovoltaic frame 100 in the first direction, and simultaneously form a smaller length region and a larger length region in the second direction. The smaller length region can guide the connecting post 230 into the photovoltaic frame 100, while the larger length region can form contact, snap-fit, or position restriction with the through hole 101, thereby balancing the assembly convenience and connection stability between the corner bracket 200 and the photovoltaic frame 100.

[0049] Furthermore, when W1=W and / or L1=L, the connecting post 230 can form a relatively sufficient dimensional fit within the through hole 101. With the connecting post 230 not protruding or protruding only slightly from the outer surface of the photovoltaic frame 100, the possibility of the corner bracket 200 loosening, shifting, or detaching relative to the photovoltaic frame 100 is reduced, thereby improving the connection quality and long-term reliability between adjacent photovoltaic frames.

[0050] Optionally, the volume of the connecting post 230 is N, and the volume of the cavity defined by the through hole 101 is M, satisfying: 0.375≤N / M<0.8.

[0051] In one or more embodiments of this disclosure, the volume N of the connecting post 230 can be understood as the three-dimensional solid volume defined by the outer surface of the connecting post 230. Specifically, before or after the connecting post 230 is connected to the through hole 101, the outer surface contour of the connecting post 230 is determined, and the volume N of the connecting post 230 is obtained based on the outer surface contour of the connecting post 230.

[0052] In one or more embodiments of this disclosure, when the connecting post 230 includes an inclined surface, an arcuate surface, a stepped surface, a chamfered surface, or other local structures, the volume N of the connecting post 230 may include the solid volume jointly defined by the inclined surface, arcuate surface, stepped surface, chamfered surface, or other local structures. In other words, the volume N of the connecting post 230 is the actual solid volume of the overall structure of the connecting post 230.

[0053] In one or more embodiments of this disclosure, the cavity volume M defined by the through hole 101 can be understood as: a three-dimensional spatial volume defined at least by the hole wall and the hole opening boundary of the through hole 101. Specifically, the cavity volume M defined by the through hole 101 can be determined based on the extension dimension of the through hole 101 in the photovoltaic frame 100 in the second direction and the contour area of ​​the through hole 101 in a cross section perpendicular to the second direction.

[0054] In one or more embodiments of this disclosure, the volume N of the connecting post 230 and the cavity volume M defined by the through hole 101 can both be values ​​measured in cubic millimeters, and both N and M are dimensionless values ​​used in the relational calculations. In other words, in this disclosure, N represents the volume of the connecting post 230 measured in cubic millimeters, M represents the cavity volume of the through hole 101 measured in cubic millimeters, and N / M is a dimensionless ratio. Accordingly, N / M can be used to characterize the relative size relationship between the overall volume of the connecting post 230 and the cavity volume of the through hole 101, and can also be used to characterize the degree of volume matching between the connecting post 230 and the through hole 101.

[0055] In one or more embodiments of this disclosure, when the through hole 101 is a cylindrical hole, the cavity volume M can be determined based on the diameter and depth of the through hole 101 (i.e., the length of the through hole 101 along the second direction); when the through hole 101 is a cuboid or cube hole, the cavity volume M can be determined based on the length, width, and depth of the through hole 101; when the through hole 101 is an elliptical hole, a waist-shaped hole, a conical hole, a stepped hole, or other irregularly shaped hole, the cavity volume M can be determined based on the cross-sectional profile at different positions of the through hole 101 and the distance between the corresponding cross-sections. Of course, the through hole 101 can also have other shapes, and those skilled in the art can make reasonable selections or settings according to actual conditions, which is not limited in this disclosure.

[0056] In one or more embodiments of this disclosure, 0.375 ≤ N / M < 0.8, meaning that the volume N of the connecting post 230 is not less than 35% of the cavity volume M defined by the through hole 101, and is less than 80% of the cavity volume M defined by the through hole 101. Exemplarily, N / M can be 0.375, 0.38, 0.39, 0.40, 0.41, 0.42, 0.43, 0.44, 0.45, 0.46, 0.47, 0.48, 0.49, 0.50, 0.51, 0.52, 0.53, 0.54, 0.55, 0.57, 0.58, 0.59, 0.60, 0.61, 0.62, 0.63, 0.64, 0.65, or a range of any two values. Preferably, 0.40 ≤ N / M ≤ 0.55; more preferably, 0.45 ≤ N / M ≤ 0.55; even more preferably, 0.45 ≤ N / M ≤ 0.52, or 0.45 ≤ N / M ≤ 0.50. Of course, N / M can also be other values ​​or other ranges, and this disclosure does not limit it.

[0057] In one or more embodiments of this disclosure, when N / M is small, the connecting post 230 has a larger remaining space relative to the through hole 101, which is beneficial for the connecting post 230 to enter the through hole 101. However, if N / M is too small, the structural portion of the connecting post 230 that can form contact, latching, or limiting with the through hole 101 may be relatively small, which can easily reduce the connection stability between the connecting post 230 and the through hole 101. When N / M increases, the volume ratio of the connecting post 230 in the space defined by the through hole 101 increases accordingly, and the structural portion of the connecting post 230 that can form contact, latching, or limiting with the through hole 101 can increase accordingly, which is beneficial for reducing the shaking, shifting, or detachment of the connecting post 230 relative to the through hole 101.

[0058] However, if the volume of the connecting post 230 is too large relative to the cavity volume defined by the through hole 101, the connecting post 230 may cause large local deformation when it enters the photovoltaic frame 100. The material cost of the connecting post 230 will also increase, increasing the material cost of the corner bracket 200 or the risk of local damage to the photovoltaic frame 100.

[0059] In one or more embodiments of this disclosure, preferably, the connecting post 230 can be entirely located within the through hole 101. In this case, N / M can directly characterize the volume ratio of the connecting post 230 within the through hole 101. If N / M is less than 0.8, the connecting post 230 can be fully accommodated within the through hole 101, reducing the possibility of the connecting post 230 protruding from the outer surface of the photovoltaic frame 100.

[0060] In one or more embodiments of this disclosure, by ensuring that 0.35 ≤ N / M < 0.8, a certain volume difference can be maintained between the connecting post 230 and the through hole 101. This allows the connecting post 230 to have the space to enter the through hole 101, while simultaneously ensuring that the connecting post 230 has sufficient volume to connect with the through hole 101, forming contact, snap-fit, or other positional constraints with the hole wall or edge of the through hole 101. Therefore, both the ease of assembly between the connecting post 230 and the through hole 101 and the cost of corner brackets can be considered.

[0061] In this disclosure, firstly, by ensuring that the volume N of the connecting post 230 and the cavity volume M defined by the through hole 101 satisfy 0.375 ≤ N / M < 0.8, the matching degree between the connecting post 230 and the through hole 101 can be defined from a three-dimensional volume relationship perspective. The volume relationship is not limited to the specific cross-sectional shapes of the connecting post 230 and the through hole 101, and can be applied to circular, rectangular, square, elliptical, waist-shaped or other regular and irregular structures. Secondly, by ensuring that the volume of the connecting post 230 is not less than 35% of the cavity volume of the through hole 101, the connecting post 230 can have sufficient solid structure to form contact or positional constraint with the through hole 101, reducing the possibility of the connecting post 230 loosening or detaching relative to the through hole 101. At the same time, by ensuring that the volume of the connecting post 230 is less than 80% of the cavity volume defined by the through hole 101, the increased cost of corner brackets or the risk of local damage caused by the excessive volume of the connecting post 230 can be reduced, achieving a proper balance between the assembly cost and connection reliability between the connecting post 230 and the through hole 101.

[0062] Optionally, the connecting post 231 includes an inclined surface 240, which extends obliquely from the position of the connecting post 231 having the maximum value L1 to the position having the minimum value L2, and the inclined surface 240 is at least partially located within the through hole 101; projected along a third direction, the projected length of the inclined surface 240 is R, and the diagonal length of the through hole 101 is S, satisfying: , 0.90 < R / S ≤ 1, the third direction intersects the plane defined by the first direction and the second direction.

[0063] In one or more embodiments of this disclosure, such as Figure 3 , Figures 6 to 8 As shown, the inclined surface 240 can be understood as: a surface on the outer surface of the connecting post 230 that is inclined relative to the first direction and / or the second direction, causing the length of the connecting post 230 along the second direction to change at different positions in the first direction. One side of the inclined surface 240 is connected to or adjacent to the position of the connecting post 230 with the maximum length L1, and the other side of the inclined surface 240 is connected to or adjacent to the position of the connecting post 230 with the minimum length L2, and the inclined surface 240 extends continuously or segmentally between the two, so that the length of the connecting post 230 along the second direction can gradually decrease from the maximum length L1 to the minimum length L2, or gradually increase from the minimum length L2 to the maximum length L1.

[0064] In one or more embodiments of this disclosure, the inclined surface 240 can be a plane, an arc surface, a curved surface, a plurality of sequentially connected inclined sub-surfaces, or a composite surface formed by the inclined surface and the transition surface. The inclined surface 240 can extend inclinedly along a straight line, or it can extend along an arc, a broken line, or other predetermined path. Of course, the inclined surface 240 can also adopt other structures that allow the length of the connecting column 230 to change from L2 to L1. Those skilled in the art can make reasonable selections or settings according to the actual situation, and this disclosure does not limit this.

[0065] In one or more embodiments of this disclosure, the side of the connecting post 230 with the minimum length L2 can form the inlet side of the connecting post 230, and the side of the connecting post 230 with the maximum length L1 can form the mating side of the connecting post 230. When the connecting post 230 is connected to the through hole 101, the inlet side with the shorter length can enter the interior of the photovoltaic frame 100 first, and the inclined surface 240 can contact the inner wall of the photovoltaic frame 100 as the connecting post 230 continues to enter the interior of the photovoltaic frame 100, and guide the connecting post 230 to gradually move from the area with the shorter length to the area with the longer length.

[0066] In one or more embodiments of this disclosure, the inclined surface 240 is at least partially located within the through hole 101. This can be understood as follows: when the connecting post 230 is connected to the through hole 101, a portion or all of the inclined surface 240 is located within the space defined by the cavity of the through hole 101. Preferably, the inclined surface 240 is entirely located within the through hole 101. Thus, the inclined transition structure of the connecting post 230 is accommodated within the through hole 101, reducing the height of the inclined surface 240 or the connecting post 230 protruding from the outer surface of the photovoltaic frame 100, and maximizing the fit between the inclined surface 240 and the through hole 101.

[0067] In one or more embodiments of this disclosure, projection along a third direction can be understood as: orthographically projecting the inclined surface 240, connecting post 230, and through hole 101 along a third direction, so that the inclined surface 240, connecting post 230, and through hole 101 form corresponding projection profiles in a projection plane perpendicular to the third direction. The third direction can be the projection direction used to observe or measure the projection profiles of the inclined surface 240, connecting post 230, and through hole 101. The third direction can be the direction of the photovoltaic frame light height or the opposite direction of the photovoltaic frame light height direction, for example... Figure 2 The third direction, either in the Z direction or the opposite direction of the Z direction, intersects the plane defined by the first and second directions. Preferably, the third direction is perpendicular to the plane defined by the first and second directions, so that the projection formed along the third direction can more accurately reflect the actual contour and size of the inclined surface 240 within the plane defined by the first and second directions, and the third direction, the first direction, and the second direction are mutually perpendicular.

[0068] In one or more embodiments of this disclosure, the projected length R of the inclined surface 240 is the length extending from the position near the maximum length L1 of the inclined surface 240 to the position near the minimum length L2 of the inclined surface 240 in the projected profile along a third direction. Specifically, when the inclined surface 240 is a plane and its projected profile is a straight line segment, R can be the distance between the two endpoints of the straight line segment; when the inclined surface 240 is an arc-shaped surface or a curved surface and its projected profile is a curve, R can be the straight-line distance between the two ends of the curve, or it can be the curve length measured along the curve. Preferably, R is the straight-line distance between the two ends of the projected profile of the inclined surface 240, so that the inclined surfaces 240 with different structural forms can be measured and compared in the same way.

[0069] In one or more embodiments of this disclosure, the maximum width of the through hole 101 along the first direction is W, the length of the through hole 101 along the second direction is L, and the diagonal length of the through hole 101 is S. The diagonal length S can be understood as: the length of the line segment connecting two diagonally opposite positions of the through hole 101 along the first and second directions in the projected outline of the through hole 101 after projection along a third direction. When the first direction is perpendicular to the second direction, and the projected outline of the through hole 101 along the third direction is rectangular or square, the diagonal length S of the through hole 101 satisfies:

[0070] Where L is the length of the through hole 101 along the second direction, and W is the maximum width of the through hole 101 along the first direction.

[0071] In one or more embodiments of this disclosure, when the through hole 101 is a cylindrical hole, the maximum width W of the through hole 101 along the first direction can be the diameter of the through hole 101, the length L along the second direction can be the length of the through hole 101, and the diagonal length S of the through hole 101 can be the diagonal length of the circumscribed square formed by W and L as two mutually perpendicular sides. When the through hole 101 is an elliptical hole, a waist-shaped hole, or other non-rectangular hole, S can be the diagonal length of the smallest circumscribed rectangle of the projected contour of the through hole 101 along a third direction, or it can be the distance between the two farthest positions within the projected contour of the through hole 101.

[0072] It should be noted that in the same photovoltaic frame connection module, R and S are determined using the same projection direction and the same measurement benchmark, thereby reducing the impact of different projection directions or different measurement methods on the R / S value. R, L, W, and S can be values ​​measured in millimeters for the corresponding lengths, and R, L, W, and S can all be dimensionless values ​​used in the relational calculation.

[0073] In one or more embodiments of this disclosure, R / S can be 0.91, 0.92, 0.93, 0.94, 0.95, 0.951, 0.96, 0.961, 0.97, 0.98, 0.998, 0.999, 1.00, or a range of any two values. Preferably, 0.951 ≤ R / S ≤ 0.998. Of course, R / S can also be other values ​​or other ranges, and this disclosure does not limit this.

[0074] In one embodiment of this disclosure, such as Figures 1 to 3 As shown, the inclined surface 21 is a plane, and the inclined surface 21 can serve as the inclined surface 240; in another embodiment of this disclosure, as Figures 4 to 6As shown, inclined surface 22 is a plane, and inclined surface 22 can be used as inclined surface 240. Obviously, both inclined surface 21 and inclined surface 22 can extend inclinedly from the position of the connecting column 230 with the maximum length L1 to the position with the minimum length L2. They can have different inclination directions, inclination degrees, and position settings to form connecting columns 230 with different structural forms.

[0075] In one or more embodiments of this disclosure, when R / S is small, the transition length formed by the inclined surface 240 along its projection direction is relatively short, and the length of the connecting post 230 along the second direction can change from L2 to L1 within a short distance. The dimensional change of the connecting post 230 may be more concentrated, and the contact between the inclined surface 240 and the inner wall of the photovoltaic frame 100 may produce a more concentrated effect. When R / S increases, the inclined surface 240 can achieve the transition of the connecting post 230 from the minimum length L2 to the maximum length L1 within a relatively long projection distance, making the length change of the connecting post 230 more gradual. Therefore, during the process of the connecting post 230 entering the photovoltaic frame 100, the assembly obstacles that may occur when the connecting post 230 contacts the inner wall of the photovoltaic frame 100 can be reduced.

[0076] In this disclosure, firstly, by extending the inclined surface 240 at an angle from the position where the connecting post 230 has the maximum length L1 to the position where it has the minimum length L2, the projected length R of the inclined surface 240 and the diagonal length S of the through hole 101 satisfy 0.90 < R / S ≤ 1. This allows the length of the connecting post 230 along the second direction to form a gradient structure in the first direction, enabling the region with the smaller length of the connecting post 230 to guide the connecting post 230 into the photovoltaic frame 100. The inclined surface 240 thus has sufficient length to guide the connecting post 230 into the photovoltaic frame 100. The transition length allows the connecting post 230 to have a larger area that can contact or positionally restrict the through hole 101. In addition, by making the inclined surface 240 at least partially located within the through hole 101, the inclined surface 240 can play a gradual transition and fit role in the actual connection area between the connecting post 230 and the through hole 101, and reduce the degree to which the connecting post 230 protrudes from the outer surface of the photovoltaic frame 100, thus taking into account both the convenience of the corner bracket 200 entering the photovoltaic frame 100 and the degree of dimensional fit between the connecting post 230 and the through hole 101.

[0077] Optionally, 0.4 < N / M*R / S < 0.6.

[0078] In one or more embodiments of this disclosure, (N / M) × (R / S) can be used to characterize the combined relationship between the solid connection effect of the connecting post 230 and the progressive introduction effect of the inclined surface 240. This product can be defined as the introduction connection coordination parameter, specifically: When N / M and R / S are relatively large, the connecting post 230 can have a sufficient solid structure to form contact, snap-fit, or positional restriction with the through hole 101, and the inclined surface 240 can also have a sufficient extension range, so that the connecting post 230 gradually changes its contact state with the through hole 101 during the process of entering the through hole 101, reducing the possibility of concentrated compression or sudden resistance when the connecting post 230 directly enters the through hole 101; when N / M is relatively small and R / S is relatively large, although the inclined surface 240 can provide a sufficient gradual introduction effect, the connecting post 230 in the through hole 101... The physical occupancy within 1 may be insufficient, and a large residual space may easily form between the connecting post 230 and the through hole 101, affecting the limiting or anti-removal function of the connecting post 230; when N / M is relatively large and R / S is relatively small, although the connecting post 230 has a sufficient physical connection function, the extension range of the inclined surface 240 may be insufficient, and the connecting post 230 may easily generate a large local squeezing effect or assembly resistance when it enters the photovoltaic frame 100; when both N / M and R / S are relatively small, the physical connection function of the connecting post 230 and the gradual introduction function of the inclined surface 240 may both be insufficient.

[0079] In one or more embodiments of this disclosure, by making (N / M) × (R / S) greater than 0.4, it is possible to prevent at least one of the physical occupancy of the connecting post 230 and the introduction coverage of the inclined surface 240 from being too small. Since both N / M and R / S are not greater than 1, when their product is greater than 0.4, either N / M or R / S is greater than 0.4, the connecting post 230 has a corresponding physical connection capability, and the inclined surface 240 has a corresponding progressive introduction range.

[0080] In one or more embodiments of this disclosure, when N / M is relatively increased, the physical fit between the connecting post 230 and the through hole 101 can be correspondingly improved. In this case, by relatively increasing R / S, the inclined surface 240 can have a more sufficient extension range. When N / M is relatively decreased, although the space required for the connecting post 230 to enter the through hole 101 is correspondingly reduced, R / S can be set while satisfying the insertion connection coordination parameters, so as to balance the insertion function of the inclined surface 240 and the physical connection function of the connecting post 230.

[0081] In one or more embodiments of this disclosure, the import connection coordination parameter can be 0.42, 0.428, 0.43, 0.44, 0.442, 0.449, 0.45, 0.456, 0.459, 0.46, 0.469, 0.470, 0.480, 0.485, 0.490, 0.500, 0.505, 0.510, 0.514, 0.519, 0.520, 0.523, 0.529, 0.530, 0.539, 0.540, 0.549, or a range between any two of the above values. Preferably, 0.428 ≤ N / M * R / S ≤ 0.549. For example, when N / M is 0.50 and R / S is 1, the import connection coordination parameter is 0.5.

[0082] In one embodiment of this disclosure, when the through hole 101 is a cylindrical hole, the maximum width W1 of the connecting post 230 is equal to the maximum width W of the through hole 101, i.e., W=W1. The length L of the through hole 101 along the second direction is 2mm-5mm (i.e., 2mm≤L≤5mm), and the maximum width W is 5mm-14mm (i.e., 5mm≤W≤14mm). The connecting post 230 has a maximum length L1 and a minimum length L2 that are relatively arranged, and the volume ratio N / M of the connecting post 230 and the through hole 101 satisfies 0.45≤N / M≤0.55.

[0083] For example, when N / M is 0.55, L1 = L, L2 = 0.1L; when N / M is 0.45, L1 = 0.9L, L2 = 0, thus making L1 - L2 approximately 0.9L. Let the extension length of the inclined surface of the connecting column 230 within the corresponding cross-section be R, and the diagonal length of the cross-section corresponding to the through hole 101 be S, where... , Based on the above size range, N / M can take values ​​of 0.45, 0.46, 0.47, 0.48, 0.49, 0.51, 0.52, 0.53, 0.54, and 0.55 in sequence. Correspondingly, we can obtain: 0.951 ≤ R / S ≤ 0.998. For example, R / S can be 0.951, 0.961, 0.970, 0.980, 0.990, 0.998, 0.999, 1.000, or any value between any two of the above. The product of N / M and R / S satisfies 0.428 ≤ (N / M) / R / S. / M)×(R / S)≤0.549, for example, 0.428, 0.43, 0.44, 0.442, 0.449, 0.45, 0.456, 0.459, 0.46, 0.469, 0.470, 0.480, 0.485, 0.490, 0.500, 0.505, 0.510, 0.514, 0.519, 0.520, 0.523, 0.529, 0.530, 0.539, 0.540, 0.549, or any value range between two of the above. Therefore, by setting the above parameters, a longer inclined guide surface can be formed while maintaining a sufficient volume for the connecting post 230, thus balancing the guide performance and connection reliability of the connecting post 230.

[0084] In this disclosure, by setting 0.4 < N / M*R / S < 0.6, the physical occupancy of the connecting post 230 within the through hole 101 can be correlated with the gradual introduction of the inclined surface 240. This reduces situations where the physical occupancy of the connecting post 230 is large but the introduction effect of the inclined surface 240 is insufficient, or where the introduction range of the inclined surface 240 is large but the physical connection effect of the connecting post 230 is insufficient. This facilitates the entry of the connecting post 230 into the photovoltaic frame 100 and forms corresponding contact or positional restrictions after entering the through hole 101, balancing the assembly convenience of the corner bracket 200 and the connection reliability between the corner bracket 200 and the photovoltaic frame 100.

[0085] Optionally, the corner bracket 200 is formed of plastic material at least at the connecting post 230, and the photovoltaic frame is formed of polyurethane glass fiber composite material at least; the Shore D hardness of the connecting post 230 is H1, and the Shore D hardness of the photovoltaic frame is H2, satisfying: 0.3≤H1 / H2<0.8.

[0086] In one or more embodiments of this disclosure, the corner bracket 200 is formed of plastic material at least at the connecting post 230. The entire structure of the connecting post 230 is formed of plastic material, or at least a portion of the connecting post 230 that enters the through hole 101, contacts the wall of the through hole 101, or forms a connection with the through hole 101 is formed of plastic material. Other structures in the corner bracket 200 besides the connecting post 230 can be formed of the same plastic material as the connecting post 230. In this case, the corner bracket 200 can be integrally molded from plastic material, or it can be formed of a material different from that of the connecting post 230.

[0087] In one or more embodiments of this disclosure, the plastic material forming the connecting post 230 may include polyamide, polyoxymethylene, polypropylene, polycarbonate, polybutylene terephthalate, acrylonitrile-butadiene-styrene copolymer, polyphenylene sulfide, or blends thereof. The plastic material forming the connecting post 230 may also include toughening agents, weathering agents, UV stabilizers, flame retardants, fillers, fiber reinforcements, or other functional materials. Of course, the plastic material forming the connecting post 230 may also be other plastic materials capable of meeting the molding, assembly, and load-bearing requirements of the connecting post 230, and this disclosure does not limit this.

[0088] In one or more embodiments of this disclosure, the Shore D hardness H1 of the plastic material forming the connecting post 230 can be understood as the hardness value obtained by testing the plastic material forming the connecting post 230 using the Shore D hardness test method. The Shore D hardness H2 of the polyurethane glass fiber composite material forming the photovoltaic frame 100 can be understood as the hardness value obtained by testing the polyurethane glass fiber composite material forming the photovoltaic frame 100 using the same Shore D hardness test method. The same test conditions may include using the same type of Shore D hardness tester, the same or substantially the same test environment, sample conditioning conditions, indenter action time, reading time, and sample support conditions. Therefore, the influence of different testing equipment or test conditions on the comparison results of H1 and H2 can be reduced.

[0089] In one or more embodiments of this disclosure, the Shore D hardness of the composite photovoltaic frame profile can be 75-95, for example 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95 or a range between any two values, preferably 85-92. The Shore D hardness can be tested directly on the connecting post 230 and the photovoltaic frame 100, or H1 can be determined using a plastic sample prepared with the same material formulation, the same molding process and the same batch of materials as the connecting post 230, and H2 can be determined using a polyurethane glass fiber composite material sample prepared with the same material system, the same glass fiber content and the same molding process as the photovoltaic frame 100.

[0090] In one or more embodiments of this disclosure, one or more measurement locations can be selected on the plastic material sample and the polyurethane glass fiber composite material sample for testing, and the arithmetic mean of one or more valid measurements can be taken as H1 and H2, respectively. Exemplarily, three, five, seven, nine or more measurement locations can be selected. Each measurement location can avoid sample edges, obvious defects, holes, cracks or other locations that may affect the test results.

[0091] In one or more embodiments of this disclosure, H1 and H2 are Shore D hardness readings of the corresponding materials. Both H1 and H2 are dimensionless values ​​used in the relational calculations, and H1 / H2 is a dimensionless ratio. Exemplarily, H1 / H2 can be 0.30, 0.35, 0.40, 0.45, 0.50, 0.55, 0.60, 0.65, 0.70, 0.75, or a range of any two values. Preferably, 0.4 ≤ H1 / H2 ≤ 0.75; more preferably, 0.45 ≤ H1 / H2 ≤ 0.75. Of course, H1 / H2 can also be any other value or range satisfying 0.3 ≤ H1 / H2 < 0.8, and this disclosure does not limit this.

[0092] In one or more embodiments of this disclosure, 0.3 ≤ H1 / H2 < 0.8 can make the plastic material forming the connecting post 230 have a lower Shore D hardness than the polyurethane glass fiber composite material forming the photovoltaic frame 100. This makes the plastic material forming the connecting post 230 softer than the photovoltaic frame. As a result, when the connecting post 230 contacts the end of the photovoltaic frame 100 or the inner wall of the receiving cavity 120 during the insertion of the insertion part, it can undergo local elastic deformation or conformity towards the insertion part under the guidance of the inclined surface. The connecting post 230 can enter the receiving cavity 120 with the insertion part. When the connecting post 230 moves to the position corresponding to the through hole 101, the constraint on the connecting post 230 is reduced or at least partially restored, thereby at least partially extending into the through hole 101 and forming contact or position restriction with the hole wall of the through hole 101 to limit the movement of the corner bracket 200 in the withdrawal direction.

[0093] Therefore, during the process of the connecting post 230 entering the photovoltaic frame 100 and forming a connection with the photovoltaic frame 100, the connecting post 230 can undergo local compression and local compliance relative to the photovoltaic frame 100. The local compliance of the connecting post 230 may include local micro-indentation on the surface of the connecting post 230, micro-deformation on the inclined surface, local reduction in the size of the connecting post 230, or local contour of the connecting post 230 adapting to the contour of the hole wall of the through hole 101. The local compliance can be elastic deformation or include a small amount of plastic deformation, which reduces the local squeezing or scratching effect of the connecting post 230 on the polyurethane resin matrix, glass fiber, and resin-glass fiber interface of the photovoltaic frame, reduces the influence of the force generated by the size fit on the photovoltaic frame 100, and at the same time allows the connecting post 230 to maintain the hardness required to form a stable connection, reducing the possibility of excessive deformation, wear, or creep of the connecting post 230 due to excessively low hardness. In this way, the structural integrity of the photovoltaic frame 100 and the connection reliability between the corner bracket 200 and the photovoltaic frame 100 can be taken into account.

[0094] Optionally, the photovoltaic frame 100 includes a receiving cavity 120, and the through hole 101 communicates with the receiving cavity 120; the corner bracket 200 includes a first plug-in portion 210, a second plug-in portion 220, and a plurality of connecting posts 230 that intersect each other. The plurality of connecting posts 230 includes a first connecting post and a second connecting post. The first connecting post protrudes from the first plug-in portion 210 in a direction away from the first plug-in portion 210, and the second connecting post protrudes from the second plug-in portion 220 in a direction away from the second plug-in portion 220; the first plug-in portion 210 is inserted into and at least partially contacts the receiving cavity 120, and the first connecting post at least partially extends into the through hole; or, the second plug-in portion 220 is inserted into and at least partially contacts the receiving cavity 120, and the second connecting post at least partially extends into the through hole.

[0095] In one or more embodiments of this disclosure, the receiving cavity 120 can be understood as a cavity space formed inside the photovoltaic frame 100, capable of accommodating the first insertion portion 210 and / or the second insertion portion 220 of the corner bracket 200. The receiving cavity 120 may extend along the length direction of the photovoltaic frame 100, and an insertion port communicating with the outside may be formed at the end of the photovoltaic frame 100, so that the first insertion portion 210 or the second insertion portion 220 can enter the receiving cavity 120 through the insertion port.

[0096] In one or more embodiments of this disclosure, the photovoltaic frame 100 may include a plurality of frame walls forming a receiving cavity 120, and a through hole 101 may penetrate at least one of the plurality of frame walls and communicate with the receiving cavity 120. Thus, a first connecting post or a second connecting post may be inserted into the receiving cavity and contact the through hole 101 and connect to the through hole 101, thereby forming a connection between the corner bracket 200 and the photovoltaic frame 100.

[0097] In one or more embodiments of this disclosure, the first plug-in portion 210 can be a plug-in rod, and the second plug-in portion 220 can be a plug-in rod. The first plug-in portion 210 and the second plug-in portion 220 are intersecting, which can be understood as the extension direction of the first plug-in portion 210 intersecting the extension direction of the second plug-in portion 220. An acute angle, a right angle, or an obtuse angle can be formed between the first plug-in portion 210 and the second plug-in portion 220. Preferably, the first plug-in portion 210 and the second plug-in portion 220 are perpendicular to each other, so that the corner bracket 200 can be used to connect two photovoltaic frames 100 that are perpendicular to each other to form a corner connection structure of the photovoltaic module frame. Of course, other angles can also be formed between the first plug-in portion 210 and the second plug-in portion 220. Those skilled in the art can make reasonable selections or settings according to the connection angle between adjacent photovoltaic frames 100, and this disclosure does not limit this.

[0098] In one or more embodiments of this disclosure, the first plug-in portion 210 may include a first insertion end and a first connection end disposed along its extending direction, and the second plug-in portion 220 may include a second insertion end and a second connection end disposed along its extending direction. The first connection end of the first plug-in portion 210 may be connected to the second connection end of the second plug-in portion 220, and the first insertion end and the second insertion end may extend in different directions to be respectively inserted into two adjacent photovoltaic frames 100. Exemplarily, the first plug-in portion 210 and the second plug-in portion 220 may be integrally formed, and the first plug-in portion 210 and the second plug-in portion 220 may be injection molded to form an integral corner bracket 200.

[0099] In one or more embodiments of this disclosure, such as Figures 1 to 3 As shown, the first connecting post 231 protrudes from the first insertion portion 210. This can be understood as at least a portion of the structure of the first connecting post 231 extending outward relative to the first insertion portion 210 in a direction away from the first insertion portion 210 or in a first direction. The second connecting post 232 protrudes from the second insertion portion 220. This can be understood as at least a portion of the structure of the second connecting post 232 extending outward relative to the second insertion portion 220 in a direction away from the second insertion portion 210 or in a second direction. The first connecting post 231 can be integrally formed with the first insertion portion 210, or it can be formed independently and then connected to the first insertion portion 210. The second connecting post 232 can be integrally formed with the second insertion portion 220, or it can be formed independently and then connected to the second insertion portion 220. Of course, the first connecting post 231 and the second connecting post 232 can also be arranged in other ways, and this disclosure does not limit this.

[0100] In another or more embodiments of this disclosure, such as Figures 4 to 6As shown, the first connecting post 241 protrudes from the first insertion portion 210. This can be understood as at least a portion of the structure of the first connecting post 241 extending outward relative to the first insertion portion 210 in a direction away from the first insertion portion 210 or in a first direction. The second connecting post 242 protrudes from the second insertion portion 220. This can be understood as at least a portion of the structure of the second connecting post 242 extending outward relative to the second insertion portion 220 in a direction away from the second insertion portion 210 or in a second direction. The first connecting post 241 can be integrally formed with the first insertion portion 210, or it can be formed independently and then connected to the first insertion portion 210. The second connecting post 242 can be integrally formed with the second insertion portion 220, or it can be formed independently and then connected to the second insertion portion 220. Of course, the first connecting post 241 and the second connecting post 242 can also be arranged in other ways, and this disclosure does not limit this.

[0101] In one or more embodiments of this disclosure, the insertion and at least partial contact of the first plug-in portion 210 into the receiving cavity 120 can be understood as a portion or all of the first plug-in portion 210 entering the receiving cavity 120 through the insertion port at the end of the photovoltaic frame 100 and at least partially contacting the receiving cavity 120. The first plug-in portion 210 and the receiving cavity 120 can be fitted with a predetermined gap, and the first plug-in portion 210 and the inner wall of the receiving cavity 120 form an assembly gap in the protruding direction of the first connecting post, so that the first connecting post can enter the receiving cavity 120 with the first plug-in portion 210 and move to the position of the through hole 101; the outer surface of the first plug-in portion 210 in other directions can form a small gap fit or at least a partial contact fit with the inner wall of the receiving cavity 120. When the first connecting post moves to the position corresponding to the through hole 101, the first connecting post can enter the through hole 101 and form a connection with the through hole 101, thereby ensuring that the corner bracket 200 can be smoothly inserted into the receiving cavity while restricting the movement of the corner bracket 200 in the withdrawal direction.

[0102] In one or more embodiments of this disclosure, the insertion and at least partial contact of the second plug-in portion 220 into the receiving cavity 120 can be understood as a portion or all of the second plug-in portion 220 entering the corresponding receiving cavity 120 through the insertion port at the end of the photovoltaic frame 100 and at least partially contacting the receiving cavity 120. The second plug-in portion 220 and the receiving cavity 120 can also be fitted with a predetermined gap. An assembly gap is formed between the second plug-in portion 220 and the inner wall of the receiving cavity 120 in the protruding direction of the second connecting post, allowing the second connecting post to enter the receiving cavity 120 with the second plug-in portion 220 and move to the position of the through hole 101. The outer surface of the second plug-in portion 220 in other directions can form a small gap fit or at least a partial contact fit with the inner wall of the receiving cavity 120. When the second connecting post moves to the position corresponding to the through hole 101, the second connecting post can enter the through hole 101 and form a connection with the through hole 101, thereby ensuring that the corner bracket 200 can be smoothly inserted into the receiving cavity 120 while restricting the movement of the corner bracket 200 in the withdrawal direction.

[0103] Preferably, the first connecting post can be entirely located within the first through hole, and the second connecting post can be entirely located within the second through hole, in order to reduce the height of the first and second connecting posts protruding from the outer surface of the corresponding photovoltaic frame 100, and reduce the possibility of the first and second connecting posts being subjected to external collisions, scratches or environmental effects.

[0104] In one or more embodiments of this disclosure, after the first insertion portion 210 is inserted into the receiving cavity, the outer surface of the first insertion portion 210 can at least partially contact the inner wall of the receiving cavity 120, and the connection between the first connecting post and the through hole can restrict the first insertion portion 210 from exiting the corresponding receiving cavity 120; or, after the second insertion portion 220 is inserted into the receiving cavity, the outer surface of the second insertion portion 220 can at least partially contact the inner wall of the receiving cavity 120, and the connection between the second connecting post and the second through hole can restrict the second insertion portion 220 from exiting the corresponding receiving cavity 120. Therefore, the possibility of separation between the corner bracket 200 and the photovoltaic frame 100 can be reduced, and the connection and assembly of the corner bracket 200 and the photovoltaic frame 100 can be achieved.

[0105] In one or more embodiments of this disclosure, W1, W, L1, L2, L, R, S, N, and M can be measured either when the corner code 200 is not connected to the photovoltaic frame 100, or when the corner code 200 is connected to the photovoltaic frame 100. Specifically: W1, W, L1, L2, and L can be obtained using vernier calipers, micrometers, image measuring instruments, tool microscopes, coordinate measuring machines, 3D scanning equipment, or other dimensional measuring devices. R, L, W, and S can be determined based on the projected contours formed by the inclined surface 240 and the through hole 101 along a third direction. Specifically, the corresponding projected contours can be obtained using image measuring instruments, tool microscopes, contour projectors, coordinate measuring machines, 3D scanning equipment, or industrial computed tomography (CT) scanners, and the projected length R of the inclined surface 240, the length L of the through hole 101, the maximum width W, and the diagonal length S can be determined based on the projected contours. The volume N of the connecting post 230 and the cavity volume M defined by the through hole 101 can be obtained using 3D scanning, industrial computed tomography, 3D image measurement, drainage method, mass-density conversion method, 3D modeling calculation, or other volume measurement methods. Specifically, the volume N can be determined based on the 3D contour of the outer surface of the connecting post 230, and the volume M can be determined based on the cavity space defined by the 3D contour of the hole wall of the through hole 101. Specifically, when the corner bracket 200 is already connected to the photovoltaic frame 100 and is inconvenient to disassemble, the two-dimensional or three-dimensional contours of the connecting post 230 and the through hole 101 can be obtained using cross-sectional imaging, industrial computed tomography, or other non-destructive testing methods, and the aforementioned dimensional and volume parameters can be determined accordingly. It should be noted that the parameters used for the same relational calculation are preferably obtained under the same connection state, the same projection direction, and the same measurement reference to improve the repeatability and comparability of the parameter relationships.

[0106] In a second aspect, a photovoltaic module includes two first photovoltaic frames, two second photovoltaic frames, four corner brackets, and a photovoltaic laminate, wherein the two first photovoltaic frames, the two second photovoltaic frames, and the four corner brackets are connected to form a frame, and the frame and the photovoltaic laminate are connected. The first photovoltaic frame and the corner bracket are connected to form a first photovoltaic frame connection assembly, and the first photovoltaic frame connection assembly is the photovoltaic frame connection assembly described in any one of the first aspects above; Alternatively, the second photovoltaic frame and the corner bracket are connected to form a second photovoltaic frame connection assembly, wherein the second photovoltaic frame connection assembly is the photovoltaic frame connection assembly described in any one of the first aspects above.

[0107] In this disclosure, a first photovoltaic frame and a corner bracket are connected to form a first photovoltaic frame connecting assembly, which can be any of the photovoltaic frame connecting assemblies described in the first aspect above; or, a second photovoltaic frame and a corner bracket are connected to form a second photovoltaic frame connecting assembly, which can be any of the photovoltaic frame connecting assemblies described in the first aspect above. The length of the first photovoltaic frame connecting assembly can be greater than the length of the second photovoltaic frame connecting assembly. The first photovoltaic frame connecting assembly can be connected to the long side of the photovoltaic laminate, and the second photovoltaic frame connecting assembly can be connected to the short side of the photovoltaic laminate.

[0108] In other embodiments, the lengths of the first photovoltaic frame connecting component and the second photovoltaic frame connecting component may also be the same. For example, when the photovoltaic laminate is a square structure, the first photovoltaic frame connecting component and the second photovoltaic frame connecting component may adopt the same specifications. Of course, the length relationship between the first photovoltaic frame connecting component and the second photovoltaic frame connecting component can be reasonably selected or set according to the shape of the photovoltaic laminate, and this disclosure does not limit it in this regard.

[0109] In one or more embodiments of this disclosure, the first photovoltaic frame and the second photovoltaic frame can be connected by a corner bracket 200. The first insertion portion 210 of the corner bracket 200 can be inserted into the receiving cavity of the first photovoltaic frame, and the second insertion portion 220 of the corner bracket 200 can be inserted into the receiving cavity of the second photovoltaic frame. The first connecting post 231 can extend at least partially into the through hole of the first photovoltaic frame, and the second connecting post 232 can extend at least partially into the through hole of the second photovoltaic frame. Thus, the separation of the first photovoltaic frame and the second photovoltaic frame in the corresponding insertion direction is restricted by the same corner bracket 200, thereby reducing the possibility of internal separation of the photovoltaic module under transportation, installation or long-term load, and improving the overall stability and long-term reliability of the photovoltaic module structure.

[0110] In one or more embodiments of this disclosure, the first photovoltaic frame and the second photovoltaic frame may each have a laminate mounting groove for receiving the edge of the photovoltaic laminate. The respective edge of the photovoltaic laminate may at least partially enter the laminate mounting groove and may be connected to the corresponding first photovoltaic frame connection assembly or second photovoltaic frame connection assembly by structural adhesive, sealant, elastic pad, clamping part, or at least two of these.

[0111] Those skilled in the art will understand that the technical features of the above embodiments can be combined arbitrarily. For the sake of brevity, not all possible combinations of the technical features in the above embodiments have been described. The steps, measures, and schemes in the various operations, methods, and processes discussed in this disclosure can be alternated, modified, combined, or deleted. Furthermore, other steps, measures, and schemes in the various operations, methods, and processes discussed in this disclosure can also be alternated, modified, rearranged, decomposed, combined, or deleted. Furthermore, the steps, measures, and schemes in the prior art that are different from those in the various operations, methods, and processes disclosed in this disclosure can also be alternated, modified, rearranged, decomposed, combined, or deleted. As long as there is no contradiction in the combination of these technical features, they should all be considered to be within the scope of this specification.

[0112] The above-described embodiments are merely examples of several implementation methods of the present disclosure, and their descriptions are relatively specific and detailed. However, they should not be construed as limiting the scope of the patent for the present disclosure. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the present disclosure, and these all fall within the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be determined by the appended claims.

Claims

1. A photovoltaic frame connection component, characterized in that, include: A photovoltaic frame, the photovoltaic frame including through holes; Angle code, the angle code including a connecting post, the connecting post being connected to the through hole; Along the first direction, the maximum width of the connecting post is W1, and the maximum width of the through hole is W, satisfying: W1≤W; Along the second direction, the maximum length of the connecting post is L1, the minimum length of the connecting post is L2, and the length of the through hole is L, satisfying: L2<L1≤L, L1>0, and the first direction intersects the second direction.

2. A photovoltaic frame connection component according to claim 1, characterized in that, The volume of the connecting post is N, and the volume of the cavity defined by the through hole is M, satisfying: 0.375≤N / M<0.

8.

3. A photovoltaic frame connection component according to claim 2, characterized in that, 0.45≤N / M≤0.55; or, 0.45≤N / M≤0.

52.

4. A photovoltaic frame connection component according to claim 2, characterized in that, The connecting post includes an inclined surface that extends obliquely from the position where the connecting post has the maximum value L1 to the position where it has the minimum value L2, and the inclined surface is at least partially located within the through hole; Projecting along a third direction, the projected length of the inclined surface is R, and the diagonal length of the through hole is S, satisfying: , 0.90 < R / S ≤ 1, the third direction intersects the plane defined by the first direction and the second direction.

5. A photovoltaic frame connection component according to claim 4, characterized in that, 0.4 < N / M * R / S < 0.

6.

6. A photovoltaic frame connection component according to claim 5, characterized in that, The third direction, the first direction, and the second direction are all perpendicular to each other; The through hole is a cylindrical hole, a cuboid hole, or a cubic hole; 0.951≤R / S≤0.998; or, 0.428≤N / M*R / S≤0.549; or 0.8≤W1 / W≤1.

7. A photovoltaic frame connection component according to claim 5, characterized in that, The first direction is perpendicular to the second direction, and one or two corner codes are provided; And / or, the inclined surface is a plane, W1=W, and the entire inclined surface is located within the through hole; And / or, 2mm≤L≤5mm, 5mm≤W≤14mm; And / or, 0mm≤L2≤1mm, 2mm≤L1≤5mm.

8. A photovoltaic frame connection assembly according to claim 5, characterized in that, The corner bracket is formed of plastic material at least at the connecting post, and the photovoltaic frame is formed of polyurethane glass fiber composite material at least; the Shore D hardness of the connecting post is H1, and the Shore D hardness of the photovoltaic frame is H2, satisfying: 0.3≤H1 / H2<0.

8.

9. A photovoltaic frame connection component according to claim 2, characterized in that, The photovoltaic frame includes a receiving cavity, and the through hole communicates with the receiving cavity; the corner bracket includes a first plug-in portion, a second plug-in portion, and a plurality of connecting posts arranged intersectingly, the plurality of connecting posts including a first connecting post and a second connecting post, the first connecting post protruding from the first plug-in portion in a direction away from the first plug-in portion, and the second connecting post protruding from the second plug-in portion in a direction away from the second plug-in portion; the first plug-in portion is inserted into and at least partially contacts the receiving cavity, and the first connecting post at least partially extends into the through hole; or, the second plug-in portion is inserted into and at least partially contacts the receiving cavity, and the second connecting post at least partially extends into the through hole.

10. A photovoltaic module, characterized in that, The photovoltaic module includes two first photovoltaic frames, two second photovoltaic frames, four corner brackets, and a photovoltaic laminate. The two first photovoltaic frames, the two second photovoltaic frames, and the four corner brackets are connected to form a frame, and the frame is connected to the photovoltaic laminate. The first photovoltaic frame and the corner bracket are connected to form a first photovoltaic frame connection assembly, and the first photovoltaic frame connection assembly is the photovoltaic frame connection assembly of any one of the above claims 1-9; Alternatively, the second photovoltaic frame and the corner bracket are connected to form a second photovoltaic frame connection assembly, wherein the second photovoltaic frame connection assembly is the photovoltaic frame connection assembly described in any one of the claims 1-9.

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