CN115260547B

CN115260547B - Composite material, photovoltaic module frame, frame preparation process and photovoltaic module

Info

Publication number: CN115260547B
Application number: CN202110484990.0A
Authority: CN
Inventors: 张泽辉; 宫欣欣; 郭志球
Original assignee: Zhejiang Jinko Solar Co Ltd; Jinko Solar Co Ltd
Current assignee: Zhejiang Jinko Solar Co Ltd; Jinko Solar Co Ltd
Priority date: 2021-04-30
Filing date: 2021-04-30
Publication date: 2023-10-20
Anticipated expiration: 2041-04-30
Also published as: CN115260547A

Abstract

The application provides a composite material, a photovoltaic module frame, a frame preparation process and a photovoltaic module, wherein the composite material comprises the following components in parts by weight: 20-90 parts of three-dimensional reinforced structure, 20-85 parts of thermoplastic resin or 20-85 parts of thermosetting resin, 0-15 parts of glass beads and 0.05-1.5 parts of nucleating agent. According to the composite material, the photovoltaic module frame and the frame preparation process, the three-dimensional reinforced structure body which is of a three-dimensional structure in space is arranged, so that the three-dimensional reinforced structure body can be reliably combined with the resin material in the X direction, the Y direction and the Z direction, the supporting and combining force can be provided in all directions, the structural strength of the composite material is effectively improved, the structural strength of the photovoltaic module frame prepared from the composite material can be further improved, and the problem of cracking or breaking is avoided.

Description

Composite material, photovoltaic module frame, frame preparation process and photovoltaic module

Technical Field

The application relates to the technical field of photovoltaic modules, in particular to a composite material, a photovoltaic module frame, a frame preparation process and a photovoltaic module.

Background

Photovoltaic modules typically employ special side frames to protect the edges of the photovoltaic module. The prior frame is generally formed by pressing spiral glass fiber or continuous glass fiber and polyurethane. However, the spiral glass fiber or the continuous glass fiber has the function of improving strength only in a certain direction, and is easy to damage in the pressing process, for example, the spiral fiber exists in a bent form, the fiber is unevenly distributed, and the mechanical property of the material is affected. In addition, the current production investment cost is large, the popularization is not easy, and meanwhile, the used fiber base material is high in price and can be limited in section bar application.

Disclosure of Invention

The application aims to provide a composite material, a photovoltaic module frame, a frame preparation process and a photovoltaic module, and aims to solve the problem that in the prior art, the mechanical properties of materials are affected due to uneven fiber distribution.

The first aspect of the application provides a composite material, which comprises the following components in parts by weight: 20-90 parts of three-dimensional reinforced structure, 20-85 parts of thermoplastic resin or 20-85 parts of thermosetting resin, 0-15 parts of glass beads and 0.05-1.5 parts of nucleating agent.

In one embodiment, the three-dimensional reinforced structure is a laminated structure with a thickness direction consistent with a Z-axis direction in a space coordinate system, and comprises a plurality of first reinforcing bodies, second reinforcing bodies and third reinforcing bodies, wherein the first reinforcing bodies, the second reinforcing bodies and the third reinforcing bodies respectively extend along the X-axis direction, the Y-axis direction and the Z-axis direction in the space coordinate system and intersect to form the three-dimensional reinforced structure.

In one embodiment, the first reinforcements are arranged side by side, and/or the second reinforcements are arranged side by side, and/or the third reinforcements are arranged side by side; the first reinforcement body, the second reinforcement body and the third reinforcement body are intersected at the same point respectively so as to form a plurality of reinforcement points on the three-dimensional reinforcement structure.

In one embodiment, the distance between adjacent reinforcement points is 0.5-2mm.

In one embodiment, the third reinforcement has a length of 0.5-3mm.

In one embodiment, the composite is a layered structure with 2-3 layers of the three-dimensional reinforcing structure per 1mm thick composite.

In one embodiment, the substrate of the three-dimensional reinforcing structure is one or a combination of more than two of glass fiber, aramid fiber, ultra-high molecular weight polyethylene fiber and natural fiber.

In one embodiment, the thermoplastic resin is one or a combination of two or more of polyamide 66, polyamide 6, polyethylene terephthalate, polypropylene, acrylonitrile-butadiene-styrene, and acrylate-butadiene-acrylonitrile copolymer.

In one embodiment, the thermosetting resin is one or a combination of more than two of unsaturated polyester resin, vinyl ester resin, epoxy resin and polyurethane resin.

A photovoltaic module frame prepared from the composite material of any one of the above.

In one embodiment, the photovoltaic module frame comprises a body and a fixing sleeve used for connecting the corner connector, wherein the body is provided with a fixing hole and a clamping groove used for embedding the photovoltaic module, the fixing sleeve is fixedly embedded in the fixing hole, and two adjacent bodies can be fixedly connected through the cooperation of the corner connector and the fixing sleeve.

In one embodiment, the fixing hole is formed by drilling the body in the thickness direction, and the plane of the lamellar structure of the three-dimensional reinforced structure body is parallel to the radial direction of the fixing hole.

In one embodiment, the fixing hole is surrounded by the body, and the lamellar structure of the three-dimensional reinforcing structure surrounds the fixing hole.

In one embodiment, the width of the top of the body is 10 mm-12 mm, the height of the side wall of the body is 2 mm-40 mm, and the width of the bottom of the body is 10 mm-35 mm.

In one embodiment, the material of the fixing sleeve is an alloy.

In one embodiment, the wall surface of the fixing sleeve is a wave surface.

A process for preparing a photovoltaic module frame, the process comprising the steps of:

preparing a fiber body having at least a portion of the structure as the three-dimensional reinforcing structure;

placing the fiber body into a mold and adding a liquid thermoplastic resin or thermosetting resin into the mold to impregnate the fiber body;

plasticizing the material in the mold;

and pressing the plasticized material in the die to form the photovoltaic module frame.

In one embodiment, the plasticizing the material in the mold includes:

plasticizing the material in the mold through an oven and a high-temperature die head, and forming a fixed hole on the plasticized composite material;

and placing a fixing sleeve into the die, and embedding the fixing sleeve into the fixing hole.

In one embodiment, the forming a fixing hole in the plasticized composite material includes:

the fixing holes are drilled in the composite material in the thickness direction, or the composite material is bent to surround the fixing holes.

A photovoltaic module comprising any of the photovoltaic module frames described above.

The technical scheme provided by the application can achieve the following beneficial effects:

according to the composite material, the photovoltaic module frame and the frame preparation process, the three-dimensional reinforced structure body which is of a three-dimensional structure in space is arranged, so that the three-dimensional reinforced structure body can be reliably combined with the resin material in the X direction, the Y direction and the Z direction, the supporting and combining force can be provided in all directions, the structural strength of the composite material is effectively improved, the structural strength of the photovoltaic module frame prepared from the composite material can be further improved, and the problem of cracking or breaking is avoided.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application as claimed.

Drawings

FIG. 1 is a schematic structural diagram of a composite material according to an embodiment of the present application;

fig. 2 is a schematic structural diagram of a photovoltaic module frame according to an embodiment of the present application;

FIG. 3 is a schematic diagram of the structure of an embedded corner brace;

FIG. 4 is a schematic diagram of a loose-fitting corner fitting;

fig. 5 is a process flow chart of a photovoltaic module frame preparation process according to an embodiment of the present application.

Reference numerals:

1-a body;

11-fixing holes;

12-clamping grooves;

13-top;

14-side walls;

15-bottom;

16-fixing the sleeve;

161-wall surface;

162-mounting holes;

163-mounting portion;

a-width;

b-height;

c-width;

2-angle code;

2 a-a first fixed edge;

2 b-a second fixed edge;

21-latch teeth;

22-hollowed-out parts;

3-a stereo reinforcing structure;

31-a first reinforcement;

32-a second reinforcement;

33-third reinforcement.

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the application and together with the description, serve to explain the principles of the application.

Detailed Description

The present application will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present application more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the application.

In the description of the present application, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance unless explicitly specified or limited otherwise; the term "plurality" means two or more, unless specified or indicated otherwise; the terms "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, integrally connected, or electrically connected; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances.

In the description of the present specification, it should be understood that the terms "upper", "lower", and the like used in the embodiments of the present application are described in terms of the angles shown in the drawings, and should not be construed as limiting the embodiments of the present application. In the context of this document, it will also be understood that when an element is referred to as being "on" or "under" another element, it can be directly on the other element or be indirectly on the other element through intervening elements.

The prior photovoltaic module frame is generally formed by adopting spiral glass fiber or continuous glass fiber mixed polyurethane through compression, but the spiral glass fiber or continuous glass fiber is often damaged in the compression process, so that the prepared photovoltaic module frame has low structural strength, and is easy to crack or even break. Especially for spiral glass fiber, the spiral glass fiber is in a multi-circle bending form, the distance between circles is difficult to ensure to be consistent in the surrounding process, so that the limit distribution is uneven, and the transverse mechanical property of the material is affected.

For this reason, in this embodiment, as shown in fig. 1 to 4, the embodiment of the present application provides a composite material, which includes, by weight, 20 to 90 parts of a three-dimensional reinforcing structure, 20 to 85 parts of a thermoplastic resin or 20 to 85 parts of a thermosetting resin, 0 to 15 parts of glass beads, and 0.05 to 1.5 parts of a nucleating agent.

Example 1

The composite material comprises 80 parts of a three-dimensional reinforced structure, 80 parts of thermoplastic resin, 10 parts of glass beads and 1.2 parts of nucleating agent.

The three-dimensional reinforced structure 3 can be formed by fibers, is formed by an extrusion process, and is compounded with corresponding resin materials, so that the performance of the materials can be improved in all directions in a space, and the uniformity of the performance of the materials is ensured. In addition, by adding glass beads and nucleating agents into the resin, the performance of the thermoplastic resin can be improved, so that the thermoplastic composite material has higher rigidity and strength and higher impact resistance at high and low temperatures. Compared with the composite material without the stereo reinforcing structure 3, the longitudinal tensile strength of the composite material of the embodiment is improved from 220Mpa to 800Mpa, the transverse tensile strength is improved from 100Mpa to 400Mpa, and the vertical compressive strength is greatly and obviously improved.

Under the condition that the amount of other components in the composite material is unchanged, as the weight part of the three-dimensional reinforced structure body 3 in the composite material increases, the vertical compression strength of the composite material is enhanced. As shown in table one.

List one

In this example, a plurality of bars were used, and the tensile strength and flexural strength of the composite material were shown in Table II and Table III, respectively.

Watch II

Watch III

It should be noted that, the thermoplastic resin used in this embodiment may be derived from various plastics and plastic batch materials suitable for extrusion process, or may be waste plastics, and the material thereof has high recycling rate. The glass beads have special hollow structures, are easy to disperse and good in fluidity, and can reduce the density of the material by adding the glass beads, and are beneficial to improving the tensile strength and the bending strength of the composite material. The nucleating agent can be an inorganic additive or an organic compound nucleating agent, and by adding the nucleating agent, the material can be promoted to be quickly nucleated and crystallized, the crystallization rate is improved, and crystal grains are refined to be orderly arranged, so that the aims of improving the strength and the rigidity are fulfilled.

The composite material can be used for manufacturing a structure needing omnibearing reinforcement, is mainly applied to a photovoltaic module frame in the embodiment, is beneficial to improving the integral strength and rigidity of the photovoltaic module frame, and can reduce the thickness of a plate and save materials under the same use requirement.

Example 2

The composite material comprises, by weight, 20-50 parts of a three-dimensional reinforced structure, 70 parts of thermosetting resin, 8 parts of glass beads and 0.9 part of a nucleating agent.

The three-dimensional reinforcing structure 3 is formed of fibers, is molded by an extrusion process, and is compounded with a corresponding resin material, so that uniformity of material properties can be ensured in all directions in a space. In addition, the glass beads and the nucleating agent are added into the resin, so that the performance of the thermosetting resin is greatly improved, and compared with the thermoplastic resin, the thermosetting resin can bear better temperature without deformation, has higher structural strength, and can permanently support and protect the photovoltaic module. The longitudinal tensile strength, the vertical compressive strength and the flexural modulus of the composite material can be obviously improved by adopting thermosetting resin, as shown in a table IV. And, the vertical compressive strength increases with an increase in the weight parts of the three-dimensional reinforcing structure.

Table four

In each of the above embodiments, the three-dimensional reinforcing structure 3 is added, and the three-dimensional reinforcing structure 3 is a three-dimensional structure in space, that is, has structural dimensions in the X direction, the Y direction, and the Z direction in the space coordinate system. When the three-dimensional reinforced structure body 3 and the resin material are mixed and pressed, the three-dimensional reinforced structure body can be reliably combined with the resin material in the X direction, the Y direction and the Z direction in a space coordinate system, so that supporting and combining force is provided in all directions, the structural strength of the composite material is effectively improved, the structural strength of the photovoltaic module frame prepared from the composite material in all directions is further improved, and the problem of cracking or breaking is avoided.

Specifically, the three-dimensional reinforced structure 3 is a laminated structure with a thickness direction consistent with a Z-axis direction, and includes a plurality of first reinforced bodies 31, second reinforced bodies 32, and third reinforced bodies 33, and the first reinforced bodies 31, the second reinforced bodies 32, and the third reinforced bodies 33 extend and intersect along an X-axis direction, a Y-axis direction, and a Z-axis direction in a spatial coordinate system, respectively, so as to form the three-dimensional reinforced structure 3, that is, reinforced bodies are provided in a horizontal longitudinal direction, a horizontal transverse direction, and a vertical thickness direction along the laminated three-dimensional reinforced structure 3. It should be noted that the first reinforcement 31, the second reinforcement 32, and the third reinforcement 33 extend along the X-axis direction, the Y-axis direction, and the Z-axis direction in the spatial coordinate system, respectively, and do not exactly coincide with the X-axis direction, the Y-axis direction, and the Z-axis direction, and may have a certain direction deviation, so long as they extend substantially along the corresponding directions.

The first reinforcement 31 and the second reinforcement 32 may provide supporting forces in the X-axis direction and the Y-axis direction to thereby enhance the horizontal supporting strength of the composite material, and the third reinforcement 33 may provide supporting forces in the Z-axis direction to thereby enhance the vertical supporting strength of the composite material in the thickness direction. Therefore, the overall structural strength of the composite material can be spatially improved through the first reinforcing body 31, the second reinforcing body 32 and the third reinforcing body 33, and the problem that the composite material cracks after being applied to the photovoltaic module frame is avoided.

Further, the first reinforcement 31, the second reinforcement 32 and the third reinforcement 33 may be arranged side by side, and the first reinforcement, the second reinforcement and the third reinforcement intersect at the same point, so as to form a plurality of reinforcement points on the three-dimensional reinforcement structure 3, where the reinforcement points can ensure reliable combination of the reinforcements, and further ensure the overall structural strength of the composite material.

Further, the distance between adjacent reinforcing points is 0.5-2mm. The distance between adjacent reinforcing points is too large, so that the reinforcing effect is reduced, and the requirement on the manufacturing process is high due to the too small distance, so that the range is suitable.

Wherein, in order to further improve the structural strength of the composite material, the composite material can be in a layered structure, and each 1mm thick composite material is provided with 2-3 layers of three-dimensional reinforced structures 3. The three-dimensional reinforcing structures 3 of the adjacent two layers can be reliably bonded by the resin material, so that the strength of the composite material in the Z-axis direction can be further enhanced.

Specifically, the substrate of the three-dimensional reinforcing structure 3 may be one or a combination of two or more of glass fibers, aramid fibers, ultra-high molecular weight polyethylene fibers, and natural fibers. Preferably, the substrate of the three-dimensional reinforcing structure 3 may be glass fibers or a combination of glass fibers and natural fibers.

Specifically, each first reinforcing body, each second reinforcing body and each third reinforcing body are formed by overlapping a plurality of fibers, so that the strength of each reinforcing body can be ensured, the shape of each reinforcing body can be kept stable during pressing, and breakage can be avoided.

Specifically, the length of the third reinforcement is 0.5-3mm. The overlength of the third reinforcement body can influence the formation of the composite material frame, and the third reinforcement body is too short to exert the reinforcing effect, and experiments prove that the third reinforcement body adopting the size specification can exert the expected reinforcing effect and can also ensure the normal formation of the composite material frame.

Specifically, the thermoplastic resin may be one or a combination of two or more of polyamide 66, polyamide 6, polyethylene terephthalate, polypropylene, acrylonitrile-butadiene-styrene, and acrylate-butadiene-acrylonitrile copolymer. Preferably, the thermoplastic resin is a blend of polypropylene and polycarbonate.

Specifically, the thermosetting resin is one or a combination of more than two of unsaturated polyester resin, vinyl ester resin, epoxy resin and polyurethane resin. Preferably, the thermosetting resin is an unsaturated polyester resin.

As shown in fig. 1 to fig. 4, the embodiment of the application further provides a photovoltaic module frame, which is prepared by adopting the composite material provided by any embodiment of the application, and the photovoltaic module frame comprises a body 1 and a fixing sleeve 16 for connecting corner codes, wherein the body 1 is provided with a fixing hole 11 and a clamping groove 12 for embedding a photovoltaic module, the fixing sleeve 16 is fixedly embedded in the fixing hole 11, and two adjacent bodies 1 can be fixedly connected by matching the corner codes 2 and the fixing sleeve 16.

The corner bracket 2 includes a first fixed edge 2a and a second fixed edge 2b, where the first fixed edge 2a and the second fixed edge 2b form a set angle, and the set angle may be a right angle or an obtuse angle, and is preferably a right angle in this embodiment. The first fixing edge 2a can be fixed in the fixing sleeve 16 of one photovoltaic module frame, and the second fixing edge 2b can be fixed in the fixing sleeve 16 of the adjacent photovoltaic module frame, so that the connection and fixation of the adjacent two photovoltaic module frames can be realized through the corner connector 2 and the fixing sleeve 16.

In this embodiment, since the composite material forming the photovoltaic module frame includes the three-dimensional reinforcing structure body 3, the three-dimensional reinforcing structure body 3 can provide the extrusion supporting force in the Z-axis direction, and when the fixing sleeve 16 extrudes the inner wall of the fixing hole 11, the three-dimensional reinforcing structure body 3 can provide the supporting force in the direction perpendicular to the extrusion surface, so that the inner wall of the fixing hole 11 can be tightly extruded and fixed with the fixing sleeve 16, thereby enabling the fixing sleeve 16 to be reliably fixed in the fixing hole 11 without using an external connection member. For the above reasons, the fixing sleeve 16 can be integrated with the composite material during the forming process of the composite material, and no external parts such as screws, rivets, glue and the like are needed to be connected, so that the strength of the connection between the fixing sleeve 16 and the frame is obviously improved, and the stretching resistance of the frame of the photovoltaic module can be improved, and when the corner connector 2 is matched and connected with the fixing sleeve 16, the pulling resistance of the corner connector 2 and the body 1 is also obviously improved.

In addition, the clamping groove 12 on the body 1 may be located above the fixing hole 11, as shown in fig. 2. The edge of the photovoltaic module can be clamped in the clamping groove 12, the edge of the photovoltaic module can be abutted against the inner wall surface of the clamping groove, and the three-dimensional reinforcing structure body 3 can also provide supporting force perpendicular to the direction of the matching interface between the photovoltaic module and the clamping groove, so that the clamping groove can be tightly extruded and fixed with the photovoltaic module, and the reliability of fixing the photovoltaic module in the clamping groove can be improved.

Specifically, the width a of the top 13 of the body 1 may be 10mm to 12mm, and in this range, the top 13 may be secured to the glass on the photovoltaic module while avoiding the sticking to the battery cells, and the width a of the top 13 is preferably 11mm. The height B of the side walls 14 of the body 1 may be between 2mm and 40mm, preferably 10mm, 20mm and 30mm, the specific height values being dependent on the dimensions of the photovoltaic module. The width C of the bottom 15 of the body 1 can be 10 mm-35 mm, the stability of the frame placement of the photovoltaic module can be ensured within the width range, and meanwhile, the photovoltaic module can be reliably supported, and in the embodiment, the width C of the bottom 15 is preferably 20mm.

Specifically, the material of the fixing sleeve 16 may be an alloy, preferably an aluminum alloy in the embodiment, and the fixing sleeve 16 made of an aluminum alloy may have a light weight and a strong wear resistance, so that the fixing sleeve has a good appearance after long-term use.

Further, the wall surface 161 of the fixing sleeve 16 is a wave surface, a hollow area can be formed between the wave surface and the inner wall surface of the fixing hole 11, at this time, the surface contact between the wall surface 161 of the fixing sleeve 16 and the inner wall surface of the fixing hole 11 is changed into line contact, the pressure intensity is obviously increased, and the connection strength and the drawing resistance of the fixing sleeve 16 and the body 1 are further improved.

As shown in fig. 1 to 5, the embodiment of the present application further provides a preparation process, where the process is used for preparing the photovoltaic module frame provided by any embodiment of the present application, and the process includes the following steps:

step S1, preparing a fiber main body with at least part of the structure being a three-dimensional reinforced structure body 3. The three-dimensional reinforced structure 3 is formed by fibers, and is formed by extrusion technology, specifically, the fiber main body can be obtained by carrying out custom point extrusion and drawing from the X-axis direction, the Y-axis direction and the Z-axis direction, the position points of an extrusion head of a custom point position die are ensured to be extruded from the die at the same time, the extrusion speed is 0.5m/min, and the continuous extrusion is carried out. Specifically, 360 glass fiber bundles may be formed to have a width of 300mm in the X-axis direction, the Y-axis direction, and the Z-axis direction, respectively. The extrusion process can realize continuous production of the photovoltaic module frame, and compared with the existing compression molding process, the method has the advantages that the cost is reduced, the product quality is easy to control, and the processing energy consumption is saved. In addition, the formed three-dimensional reinforced structure body 3 with the space three-dimensional structure can exert the maximum bearing function, and the structural strength of the three-dimensional reinforced structure body 3 is improved. The temperature of the front region of the die is 120 ℃, the temperature of the middle region is 140 ℃ and the temperature of the rear region is 175 ℃ during extrusion and drawing.

Step S2, placing the fiber body into a mold, and adding a liquid thermoplastic resin or a thermosetting resin into the mold to impregnate the fiber body. Wherein, the glue injection pressure of the resin material is 1.5-2.0 MPa, and the pultrusion speed is 0.5m/min. The mold can form the resin into a preset shape, the liquid resin can submerge the fiber main body, and after the resin is plasticized into a solid state, the fiber main body can be fixedly combined in the resin, so that the fiber main body and the resin are molded into a whole.

In the impregnation, in order to achieve effective bonding of the fiber body with the resin material, additives may be added, which may be one or a combination of several of antioxidants, compatibilizers, lubricants, flame retardants, antistatic agents, light stabilizers or color precursors.

And S3, plasticizing the material in the mold through an oven and a high-temperature die head, and forming a fixing hole 11 on the plasticized composite material. After plasticization, the liquid resin may be coagulated into a solid state, and the fiber body may be reliably fixed inside the resin.

Plasticizing through an oven and a high-temperature die head, wherein the temperature of a front region of the die is 120 ℃, the temperature of a middle region of the die is 140 ℃, and the temperature of a rear region of the die is 175 ℃; then the sheet-shaped composite material is manufactured by a multi-roll calender, and fixing holes are formed on the composite material.

Step S4, the fixing sleeve 16 is put into the mold, and the fixing sleeve 16 is embedded into the fixing hole 11.

In the above-described method of installing the fixing sleeve 16, there are a number of alternatives. For example, the fixing hole 11 may be formed on the composite material by drilling, for example, when the thickness of the composite material is relatively large and the stereo reinforcing structure is arranged in the composite material in the form of a sheet layer as an interlayer and the extending direction of the third reinforcing structure is consistent with the thickness direction of the composite material, the hole is drilled along the thickness direction of the composite material, that is, the Z-axis direction of the stereo reinforcing structure, the axial direction of the fixing hole 11 formed at this time is also along the Z-axis direction, the radial direction of the fixing hole 11 is parallel to the plane of the sheet layer structure of the stereo reinforcing structure, and after the fixing sleeve 16 is embedded into the fixing hole 11, the first reinforcing body and the second reinforcing body in the stereo reinforcing structure can provide a supporting force perpendicular to the outer surface direction of the fixing sleeve 16, so that the inner wall of the fixing hole 11 can be tightly pressed and fixed with the fixing sleeve 16, thereby the fixing sleeve 16 can be reliably fixed in the fixing hole 11 without using an external connector. In another embodiment, the fixing hole 11 may be formed by wrapping the sheet-shaped composite material in a bending manner, specifically, when the thickness of the composite material is small, the three-dimensional reinforcing structure body is arranged in the composite material in the form of a sheet layer as an interlayer, and the extending direction of the third reinforcing body is consistent with the thickness direction of the composite material, the composite material is bent to one side surface to form the fixing hole 11, at this time, the sheet structure of the three-dimensional reinforcing structure body also surrounds the fixing hole 11, and after the fixing sleeve 16 is embedded into the fixing hole 11, the third reinforcing body in the three-dimensional reinforcing structure body can provide a supporting force in the direction perpendicular to the outer surface of the fixing sleeve 16, so that the inner wall of the fixing hole 11 can be tightly pressed and fixed with the fixing sleeve 16, and the fixing sleeve 16 can be reliably fixed in the fixing hole 11 without using an external connecting piece.

And S5, pressing the fixed sleeve and the plasticized material in the die to form the photovoltaic module frame. Wherein, the pressure range of the pressing can be 200-1000 MPa, the pressing temperature can be 80-200 ℃, and the pressing time can be 10-30 min. Preferably, the pressing pressure is 300MPa, the pressing temperature is 100 ℃, and the pressing time is 20min.

It should be noted that, after the fixing sleeve 16 and the plasticized material in the mold are pressed, the frame of the photovoltaic module shown in fig. 2 can be directly formed, and the frame does not need to be pressed and formed first, and then the fixing sleeve 16 is installed separately, so that the process is simplified. In addition, as the stereoscopic reinforcing structure body 3 is fixedly combined in the plasticized material, the mutual extrusion acting force is generated between the fixing sleeve 16 and the stereoscopic reinforcing structure body 3 in the process of jointly pressing the fixing sleeve 16 and the plasticized material, so that the fixing sleeve 16 and the fixing hole 11 are reliably combined and fixed in the pressing process, and the overall tensile strength of the photovoltaic module frame is improved.

Compared with the mode of gluing the fixing sleeve 16 and the fixing hole 11, in the embodiment, the drawing force when the fixing sleeve 16 is matched with different corner codes 2 (fastening type corner code, conventional single-face sawtooth type corner code, nylon corner code and tight-fit type corner code) is larger than 300N, and the drawing force when the fixing sleeve 16 is matched with the corresponding corner code in the gluing mode is not larger than 200N, so that the photovoltaic module frame prepared by the process provided by the embodiment has higher drawing resistance.

As shown in fig. 3, when the embedded angle code is matched with the fixed sleeve 16, the latch 21 is disposed on the angle code 2, and after the angle code 2 penetrates into the fixed sleeve 16, the latch 21 can be reversely clamped at the edge of the fixed sleeve 16, so as to realize the assembly and fixation of the angle code 2 and the fixed sleeve 16. In addition, in order to reduce the weight of the corner brace 2, the corner brace 2 is further provided with a hollowed-out portion 22. As shown in fig. 3, the fixing sleeve 16 may be provided with a mounting hole 162 and a mounting portion 163, the corner bracket 2 may be fixed in the mounting hole 162, and the mounting portion 163 may protrude from an inner wall surface of the mounting hole 162, so as to implement a snap fit between the latch 21 on the corner bracket 2 and the mounting portion 163.

In addition, as shown in fig. 4, when the loose-fitting angle code is used to be matched with the fixed sleeve 16, the surface of the angle code is provided with a plurality of latches 21, and the latches 21 can be clamped and fixed with the protruding structure of the inner wall surface of the fixed sleeve 16.

Specifically, the thickness of the photovoltaic module frame can be 0.5 mm-1.6 mm, and the photovoltaic module frame can have higher strength and toughness within the thickness range. Preferably, the photovoltaic module frame has a thickness of 1.8mm, 1.0mm, 1.2mm and 1.4mm.

The above description is only of the preferred embodiments of the present application and is not intended to limit the present application, but various modifications and variations can be made to the present application by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. The photovoltaic module frame is characterized by comprising a body and a fixing sleeve used for connecting corner codes, wherein the body is provided with a fixing hole and a clamping groove used for embedding a photovoltaic module, the fixing sleeve is fixedly embedded in the fixing hole, and two adjacent bodies can be fixedly connected through the cooperation of the corner codes and the fixing sleeve; the wall surface of the fixed sleeve is a wave surface; the angle code is provided with a latch, and after penetrating into the fixed sleeve, the latch is reversely clamped at the edge part of the fixed sleeve so as to realize the assembly and fixation of the angle code and the fixed sleeve;

the photovoltaic module frame is prepared from a composite material, and the composite material comprises the following components in parts by weight: 20-90 parts of a three-dimensional reinforced structure body, 20-85 parts of thermoplastic resin or 20-85 parts of thermosetting resin, 0-15 parts of glass beads and 0.05-1.5 parts of nucleating agent;

the three-dimensional reinforced structure body is a laminated structure with the thickness direction consistent with the Z-axis direction in a space coordinate system, and comprises a plurality of first reinforced bodies, second reinforced bodies and third reinforced bodies, wherein the first reinforced bodies, the second reinforced bodies and the third reinforced bodies extend along the X-axis direction, the Y-axis direction and the Z-axis direction in the space coordinate system respectively and intersect to form the three-dimensional reinforced structure body;

each of the first reinforcements is arranged side by side, and/or each of the second reinforcements is arranged side by side, and/or each of the third reinforcements is arranged side by side; each first reinforcement body, each second reinforcement body and each third reinforcement body are intersected at the same point so as to form a plurality of reinforcement points on the three-dimensional reinforcement structure;

the distance between adjacent reinforcing points is 0.5-2mm;

the length of the third reinforcement is 0.5-3mm;

the base material of the three-dimensional reinforced structure body is one or the combination of more than two of glass fiber, aramid fiber, ultra-high molecular weight polyethylene fiber and natural fiber;

the thermoplastic resin is one or the combination of more than two of polyamide 66, polyamide 6, polyethylene terephthalate, polypropylene, acrylonitrile-butadiene-styrene and acrylic ester-butadiene-acrylonitrile copolymer;

the thermosetting resin is one or the combination of more than two of unsaturated polyester resin, vinyl ester resin, epoxy resin and polyurethane resin.

2. The photovoltaic module frame according to claim 1, wherein the fixing hole is formed by drilling the body in a thickness direction, and a plane of the lamellar structure of the three-dimensional reinforcing structure is parallel to a radial direction of the fixing hole.

3. The photovoltaic module bezel of claim 1, wherein the fixation hole is surrounded by the body, and wherein the lamellar structure of the three-dimensional reinforcement structure surrounds the fixation hole.

4. The photovoltaic module frame of claim 1, wherein the width of the top of the body is 10mm to 12mm, the height of the side wall of the body is 2mm to 40mm, and the width of the bottom of the body is 10mm to 35mm.

5. The photovoltaic module frame of claim 1, wherein the material of the fixing sleeve is an alloy.

6. A process for preparing a photovoltaic module frame according to any one of claims 1 to 5, comprising the steps of:

plasticizing the material in the mold;

7. The frame preparation process of claim 6, wherein plasticizing the material in the mold comprises:

8. The frame preparation process of claim 7, wherein the forming of the fixing hole in the plasticized composite material comprises:

9. A photovoltaic module comprising the photovoltaic module frame of any one of claims 1-5.