CN102637762B - Solar cell frame and preparation method thereof - Google Patents

Abstract

The invention provides a solar battery frame, which is made of fiber-reinforced thermosetting resin. The invention also provides a method for preparing a frame of a solar cell, comprising the following steps: forming and curing fibers in a mold after soaking in a resin mixture to obtain a fiber-reinforced thermosetting resin profile, the resin mixture includes resin and cured agent; the fiber-reinforced thermosetting resin profiles are assembled to obtain a solar cell frame. The invention uses fiber-reinforced thermosetting resin as a raw material, and the obtained solar battery frame not only has good mechanical properties and aging properties, but also has good processing properties, and can be prepared through a simple process, thereby reducing its weight and cost. In the present invention, fibers are directly soaked in the mixture of resin and curing agent, and the resin is cured while forming in a mold to obtain a fiber-reinforced thermosetting resin profile with excellent performance. The method is simple and reliable in operation and mild in conditions.

Description

Solar cell frame and preparation method thereof

technical field

The invention belongs to the technical field of solar cells, and in particular relates to a solar cell frame and a preparation method thereof.

Background technique

With the depletion of petrochemical energy, various renewable new energy industries are booming. According to the forecast of the EU Joint Research Center (JRC, Joint Research Center European Commission), by 2050, the proportion of renewable energy will exceed that of traditional energy, accounting for about 52%. %, of which solar energy accounts for more than half, about 28%. By the end of this century, the proportion of renewable energy will account for 86%, and solar energy will account for about 67%.

Solar power generation is an important part of the solar energy strategy. Among them, the solar photovoltaic industry has received special attention from the governments of various countries, and the industrialization speed is very fast. The prior art discloses a variety of photovoltaic cells, also known as solar cells. Solar cells are mainly divided into batteries based on silicon elements and batteries based on multi-element semiconductors. Solar cells based on elemental semiconductors mainly include selenium photovoltaic cells, cadmium sulfide cells, copper indium gallium selenide cells, cadmium telluride cells, gallium arsenide cells, indium phosphide solar cells, dye-sensitized solar cells and organic thin film solar cells, etc. , solar cells based on elemental semiconductors have the advantage of using a small amount of elements, and some can also be made into concentrating solar cells to increase photoelectric conversion efficiency. However, there are relatively few successful commercialization cases of photovoltaic cells based on elemental semiconductors. Lack of accumulated experience in on-site power generation projects. In addition, some elements have limited content in the earth's crust, and the process of extraction and use will pollute the environment, such as gallium, cadmium and arsenic. The content of silicon in the earth's crust is 27.6%, second only to oxygen; and the technology of purifying high-purity silicon (≥99.9999%) is relatively mature and reliable in industry. Therefore, crystalline silicon including polycrystalline silicon and single crystal silicon Silicon-based batteries, such as solar cells, have formed a booming industry that will dominate for the foreseeable future.

The main structure of crystalline silicon solar cells is a laminated structure formed by multi-layer structures such as highly transparent front plate, packaging film, silver paste or aluminum paste wire, polycrystalline or monocrystalline silicon wafer, packaging film and battery back plate. These materials are molded by heat lamination, assembled with sealing strips and frames, and then equipped with a junction box to obtain a crystalline silicon solar cell. Among them, the frame is mainly to package and protect core components such as cells, which has an important impact on the performance and service life of crystalline silicon solar cells.

In the prior art, the frame is mainly made of aluminum profiles through cold extrusion processing, which not only consumes high energy and costs, but also tends to produce corner scraps, resulting in waste. In addition, metal aluminum is more easily oxidized, resulting in a shorter service life of the solar cell during outdoor use.

Contents of the invention

In view of this, the technical problem to be solved by the present invention is to provide a solar cell frame and its preparation method. The solar cell frame provided by the present invention has good mechanical properties, aging properties and processing properties, and the preparation process is simple.

The invention provides a solar battery frame, which is made of fiber-reinforced thermosetting resin.

Preferably, the thermosetting resin is unsaturated polyester resin, vinyl ester resin, epoxy resin or polyurethane resin.

Preferably, the fibers are long fibers or long fiber fabrics.

Preferably, the fibers are one or more of glass fibers, polymer fibers, carbon fibers, hemp fibers and bamboo fibers.

Preferably, the fiber accounts for 30%-80% by mass of the fiber-reinforced thermosetting resin.

Preferably, the fiber-reinforced thermosetting resin further includes one or more of antioxidants, stabilizers, toughening agents, release agents and anti-ultraviolet aging agents.

The present invention also provides a method for preparing a solar cell frame, comprising the following steps:

The fiber is soaked in the resin mixture and then molded and solidified in a mold to obtain a fiber-reinforced thermosetting resin profile, the resin mixture includes a resin and a curing agent;

Assemble the fiber-reinforced thermosetting resin profiles to obtain a solar cell frame.

Preferably, the resin mixture further includes a catalyst.

Preferably, the resin mixture further includes one or more of antioxidants, stabilizers, tougheners, release agents and anti-ultraviolet aging agents.

Preferably, the resin is unsaturated polyester resin, vinyl ester resin, epoxy ester resin or polyurethane resin; the fiber is long fiber or fiber fabric.

Compared with the prior art, the present invention uses fiber-reinforced thermosetting resin as a raw material to prepare a solar cell frame, including the following steps: soaking the fiber in the mixture of resin and curing agent, then forming in a mold and curing to obtain a fiber-reinforced frame A thermosetting resin shaped material, and the solar battery frame can be obtained after assembling the shaped material. The invention uses fiber-reinforced thermosetting resin as a raw material, and the obtained solar battery frame not only has good mechanical properties and aging properties, but also has good processing properties, and can be prepared through a simple process, thereby reducing its weight and cost. In addition, the present invention directly soaks the fibers in the mixture of resin and curing agent, and solidifies the resin while forming in the mold to obtain a fiber-reinforced thermosetting resin profile with excellent performance. The method is simple and reliable in operation and mild in conditions. Experiments show that, compared with the aluminum profile solar cell frame, the weight of the solar cell frame provided by the invention can be reduced by 1/3, the cost can be reduced by 30% to 40%, and the tensile strength can be increased by 1.5 to 5 times, and the linear expansion can be reduced by 1/3. The coefficient can be reduced to 5~6, and the aging performance is far better than that of the aluminum profile solar cell frame.

Description of drawings

Fig. 1 is a process flow diagram of a solar cell frame provided by an embodiment of the present invention;

Fig. 2 is a schematic structural diagram of a frame of a solar cell obtained in the present invention.

Detailed ways

The invention provides a solar battery frame, which is made of fiber-reinforced thermosetting resin.

The invention uses fiber-reinforced thermosetting resin as a raw material, and the obtained solar battery frame not only has good mechanical properties and aging properties, but also has good processing properties, and can be prepared by a simple pultrusion molding process, thereby reducing its weight and cost.

In the present invention, the thermosetting resin is obtained by curing the resin at room temperature or under the action of a curing agent, including but not limited to unsaturated polyester resin, vinyl ester resin, epoxy resin or polyurethane resin, etc. The resulting thermosetting resin is cured. It should be noted that due to the different resins used, the curing mechanisms are also different, and the types of curing agents are also different. Those skilled in the art can understand that the initiators, crosslinking agents and other substances used to make the resins form thermosetting resins are also different. For the said curing agent of the present invention.

Unsaturated polyester resin refers to the resin formed by polycondensation reaction of dibasic carboxylic acid and dibasic alcohol, which can be cross-linked with unsaturated monomers to form a large network molecule with complex structure. The type of unsaturated polyester resin can be ortho-phthalic, iso-phthalic, neopentyl glycol/ortho-phthalic or iso-phthalic, etc., and the present invention is preferably iso-phthalic. In the present invention, the unsaturated monomer that makes the unsaturated polyester resin cross-linked and cured, that is, the curing agent, is also called a cross-linking agent, mainly monomers containing ethylenic bonds, such as styrene and its derivatives, Vinyl toluene, acrylates, diallyl phthalate and triallyl cyanurate, etc. In the present invention, the mixture of the unsaturated polyester resin and the crosslinking agent can be prepared by itself, or directly purchased from the market.

The crosslinking and curing reaction of unsaturated polyester resin and crosslinking agent is initiated by the free radicals generated by the initiator to activate the double bonds in the resin and crosslinking agent. It is a free radical addition polymerization reaction. Therefore, in crosslinking Need to use initiator in the process; Said initiator can be organic peroxide or azo compound, preferably organic peroxide, such as tert-butyl perbenzoate, benzoyl peroxide, cyclohexanone peroxide or iso Propylbenzene Hydroperoxide etc. In order to make the cross-linking curing reaction controllable, the present invention preferably adds accelerators in the cross-linking process, and the accelerators include but are not limited to cobalt octanoate, cobalt naphthenate or amine compounds, such as dimethylaniline, etc. . By choosing different initiators or accelerators, room temperature curing or heat curing of unsaturated polyester resins can be achieved, such as methyl ethyl ketone peroxide or cyclohexanone peroxide and cobalt accelerators, or benzoyl peroxide and anilines Accelerator can realize the room temperature curing of unsaturated polyester resin; Select benzoyl peroxide, tert-butyl perbenzoate or cumene hydroperoxide etc. to realize the thermal curing of unsaturated polyester resin, to this, the present invention There is no special limitation, and those skilled in the art can make selections according to needs.

In the present invention, the thermosetting resin can also be obtained after curing vinyl ester resin. Vinyl ester resin is a mixture obtained by addition reaction of epoxy resin and ethylenically unsaturated monobasic acid and then diluted with reactive monomers. Among them, the addition of epoxy resin and ethylenically unsaturated monobasic acid The finished product is a matrix resin, and the reactive monomer has the function of a crosslinking agent or a curing agent, that is, the addition product of an epoxy resin and an ethylenically unsaturated monobasic acid is crosslinked and cured under the action of the reactive monomer, A thermosetting resin is obtained. Among vinyl ester resins, epoxy resins include, but are not limited to, diglycidyl ether of bisphenol A or its homologues, diglycidyl ether of tetrabromobisphenol A, epoxy novolac, and diepoxidized polyoxypropylene, etc. ; Ethylenically unsaturated monobasic acids include but not limited to acrylic acid and methacrylic acid; reactive monomers include but not limited to styrene, vinyl toluene, dicyclopentadiene and acrylates. In the present invention, the vinyl ester resin can be directly purchased from the market, or can be prepared by itself, such as a mixture of styrene-diluted epoxy resin E44 and a resin obtained by reacting methacrylic acid.

In the same way, the crosslinking and curing reaction of the addition product of epoxy resin and ethylenically unsaturated monobasic acid and reactive monomer is also initiated by the initiator, which is a free radical addition polymerization reaction. Therefore, in crosslinking Need to use initiator in the process; Said initiator can be organic peroxide or azo compound, preferably organic peroxide, such as tert-butyl perbenzoate, benzoyl peroxide, cyclohexanone peroxide or iso Propylbenzene Hydroperoxide etc. In order to make the cross-linking curing reaction controllable, the present invention preferably adds accelerators in the cross-linking process, and the accelerators include but are not limited to cobalt octanoate, cobalt naphthenate or amine compounds, such as dimethylaniline, etc. . As for the curing method of the vinyl ester resin, there is no special limitation in the present invention, and those skilled in the art can choose according to the needs.

In the present invention, the thermosetting resin can also be obtained by curing an epoxy resin. Epoxy resins generally refer to organic polymer compounds containing two or more epoxy groups in the molecule, including glycidyl ether epoxy resins, glycidyl ester epoxy resins, glycidyl amine epoxy resins, There are five types of linear aliphatic epoxy resins and alicyclic epoxy resins. In the present invention, the epoxy resin is preferably a glycidyl ether epoxy resin or a glycidyl amine epoxy resin, more preferably a diphenol propane epoxy resin (bisphenol A epoxy resin for short). The molecular chain of epoxy resin contains active epoxy groups, which can cross-link with various types of curing agents to form a polymer with a three-dimensional network structure. In the present invention, curing agents used for curing epoxy resins include but are not limited to aliphatic amines, alicyclic amines, aromatic amines, polyamides, acid anhydrides, resins, tertiary amines and other curing agents, such as amine curing agents Realize curing at room temperature or low temperature, use acid anhydride and aromatic curing agent to realize heating curing, etc. In addition, the present invention can also cure the epoxy resin by ultraviolet light or light under the action of a photoinitiator. For this, the present invention has no special limitation, and those skilled in the art can make selections according to needs. In the process of curing the epoxy resin into a thermosetting resin, additives such as modifiers, fillers, and diluents can also be added.

In the present invention, the thermosetting resin can also be obtained by curing polyurethane resin. Polyurethane resin refers to the polymer whose main chain contains -NHCOO- repeating structural unit, which is formed by the polymerization reaction of isocyanate and hydroxyl compound. Among them, the commonly used isocyanates include diisocyanates such as toluene diisocyanate and diisocyanate diphenylmethane. The diisocyanate can be used as the reaction raw material of the matrix resin and can also be used as a crosslinking agent; commonly used polyols include: including ethylene glycol, Simple polyols such as glycerol, polyester oligomers containing terminal hydroxyl groups, polyether oligomers containing terminal hydroxyl groups, etc. The polyurethane resin is cured into a thermosetting resin under the action of a curing agent. The present invention has no special limitation on the curing agent, and any curing agent well-known to those skilled in the art will suffice. In addition, those skilled in the art can directly purchase two-component polyurethane including a curing agent for polyurethane resin from the market, and cure it under appropriate conditions, such as PUL 2500 of BAYDUR.

In the present invention, a solar cell frame is prepared with a fiber-reinforced thermosetting resin. The fibers may be long fibers, chopped fibers, long fiber fabrics, etc., preferably long fibers or long fiber fabrics, such as fiber mats. In the present invention, the fiber is preferably one or more of glass fiber, polymer fiber, carbon fiber, hemp fiber and bamboo fiber, more preferably glass fiber, most preferably alkali-free glass fiber.

In the present invention, in the fiber-reinforced thermosetting resin, the mass fraction of fiber as a reinforcing material is preferably 30%-80%, more preferably 35%-75%, and most preferably 40%-70%.

In order to improve the overall performance of the obtained solar cell frame, the fiber-reinforced thermosetting resin provided by the present invention also includes additives, which include but are not limited to commonly used antioxidants, stabilizers, and mold release agents for improving the overall performance of the resin. Agents, toughening agents, anti-ultraviolet aging agents, etc., can be one or more of them, and those skilled in the art can select additives according to needs, and the present invention has no special limitation on this.

In the present invention, the antioxidant can be an aromatic amine antioxidant, including diphenylamine, p-phenylenediamine or dihydroquinoline, etc.; it can also be a hindered phenolic antioxidant, such as 2,6-tri Butyl-4-methylphenol, bis(3,5-tertiary butyl-4-hydroxyphenyl) sulfide, tetrakis[β-(3,5-tertiary butyl-4-hydroxyphenyl) Propionate] pentaerythritol ester etc.; Described antioxidant can also comprise auxiliary antioxidant, include but not limited to thiodipropionate diester, phosphite etc., be preferably didodecyl alcohol ester, ditetradecyl Alcohol ester, dioctadecyl alcohol ester, trioctyl ester, tridecyl ester, tri(dodecanyl alcohol) ester or tri(hexadecanyl alcohol) ester; the present invention has no special limitation on the content of the antioxidant, Its mass fraction in the fiber-reinforced thermosetting resin is preferably 0.05% to 3%, more preferably 0.1% to 2%.

The stabilizer can include a light stabilizer, a heat stabilizer or a light heat stabilizer, preferably a light heat stabilizer, and the heat stabilizer includes but is not limited to lead salts, metal soaps, organotin, phosphite Classes or epoxies, etc., preferably include metal salt-based primary stabilizers and non-metallic-based secondary stabilizers. Those skilled in the art can select the stabilizer according to needs, and the present invention is not particularly limited. In the present invention, the mass fraction of the stabilizer in the fiber-reinforced thermosetting resin is preferably 0.05%-3%, more preferably 0.1%-2%.

The toughening agent can be a toughening agent well known to those skilled in the art, including but not limited to liquid rubber, elastomer toughening agent, inorganic rigid powder, such as polyisobutylene grafted with succinic anhydride, reactive liquid rubber ATBN, Isocyanate-terminated liquid polyurethane, micro- and nano-sized aluminum particles, and more. Those skilled in the art can select the toughening agent according to needs, and the present invention is not particularly limited. In the present invention, the mass fraction of the toughening agent in the fiber-reinforced thermosetting resin is preferably 2%-15%, more preferably 5-10%.

The release agent may be a stearate known to those skilled in the art, such as zinc stearate and the like. Those skilled in the art can select the release agent according to needs, and the present invention is not particularly limited. In the present invention, the mass fraction of the release agent in the fiber-reinforced thermosetting resin is preferably 0.05%-3%, more preferably 0.1%-2%.

The anti-ultraviolet aging agent is also called ultraviolet absorber, which can be salicylates, benzophenones, benzotriazoles, substituted acrylonitriles, triazines, hindered amines, etc., preferably salicylates Classes, benzophenones, benzotriazoles, substituted acrylonitriles or complexes of triazines and hindered amines. Those skilled in the art can select the anti-ultraviolet aging agent according to needs, and the present invention is not particularly limited. In the present invention, the mass fraction of the anti-ultraviolet aging agent in the fiber-reinforced thermosetting resin is preferably 0.2%-2%, more preferably 0.3%-0.8%.

The invention uses the fiber-reinforced thermosetting resin as a raw material, and the solar battery frame obtained by processing it not only has good mechanical properties and aging properties, but also has good processing properties.

The present invention also provides a method for preparing a solar cell frame, comprising the following steps:

The fiber is soaked in the resin mixture and then molded and solidified in a mold to obtain a fiber-reinforced thermosetting resin profile, the resin mixture includes a resin and a curing agent;

Assemble the fiber-reinforced thermosetting resin profiles to obtain a solar cell frame.

In the present invention, the resin and the curing agent are firstly mixed to obtain the resin mixture. In this technical solution, the resin and curing agent are the same as the resin and curing agent used in the above technical solution, and will not be repeated here. The present invention has no limitation on the mixing method of the resin and curing agent, and the mixing can be carried out in mixers such as ordinary mixers, static mixers, and liquid injection pumps.

In order to control the curing speed, the resin mixture preferably further includes an accelerator, which can also be called a catalyst; the present invention has no special limitation on the accelerator, which can be selected and determined by those skilled in the art according to the selected resin and curing agent.

In order to improve the overall performance of the obtained solar cell frame, the resin mixture provided by the present invention preferably also includes additives, which include but are not limited to commonly used antioxidants, stabilizers, mold release agents, The toughening agent, the anti-ultraviolet aging agent, etc. may be one or more of them, which are the same as the additives described in the above technical solution, and will not be repeated here.

After the resin mixture is obtained, fibers as reinforcing materials are soaked in the resin mixture, and then the fibers soaked in the resin mixture are molded and cured in a mold to obtain a fiber-reinforced thermosetting resin profile. In the present invention, the fibers may be long fibers, chopped fibers, long fiber fabrics, etc., preferably long fibers or long fiber fabrics, such as fiber mats. In the present invention, the fiber is preferably one or more of glass fiber, polymer fiber, carbon fiber, hemp fiber and bamboo fiber, more preferably glass fiber, most preferably alkali-free glass fiber. In the present invention, the mass fraction of the fibers in the total mass of the resin mixture and fibers is preferably 30%-80%, more preferably 35%-75%, and most preferably 40%-70%.

Immersing the fibers in the resin mixture to make the fibers fully infiltrated or soaked by the mixture includes the following steps: first, the fibers are placed on the creel, and then the fibers are guided out through the yarn guide and a certain tension is applied, and the fibers are introduced into the device. A container with a resin mixture, such as a dipping tank or a resin injection box, is equipped with a tension device inside the container, which can fully contact the fiber with the resin mixture, so that the fiber is fully soaked or soaked, and composited to form a resin-coated and infiltrated fiber reinforcement. material; then the reinforced material is introduced into a profiled material mold with a heating device, heated and solidified and cut by a cutting device to obtain a fiber-reinforced thermosetting resin profiled material. The present invention has no special limitation on the thermoforming and curing, which can be determined by those skilled in the art according to the selected resin, curing agent and accelerator. Those skilled in the art can select the profiled material mold according to needs, and the present invention has no special limitation on this. The length and cross-sectional shape of the profiled material can be determined by those skilled in the art according to the shape and size of the solar cell, and the present invention is not particularly limited.

After the profiled material is obtained, the frame of the solar cell can be obtained by assembling the profiled material. The present invention has no special limitation on the specific assembly method. Reference may be made to the assembly method of aluminum alloy door frames, picture frames, mirror frames, photo frames, etc., including But not limited to screw connection, screw connection, bayonet and slot connection, bevel connection, welding and bonding, etc. to assemble the profiled bar, preferably bonding.

Referring to Fig. 1, Fig. 1 is a process flow diagram of a solar cell frame provided by an embodiment of the present invention, wherein 1 is a creel, 2 is a yarn guide, 3 is a dipping tank provided with a tension device, and 4 is a heatable Profile mould, 5 is a traction device, and 6 is a cutting device.

Mix the resin, curing agent, accelerator and other additives evenly in the dipping tank 3 to obtain a resin mixture; the fibers are placed on the creel 1 and exported to the dipping tank 3 through the yarn guide 2. The role of the tension device Fully infiltrate the resin mixture; the fiber soaked with the resin mixture enters the heatable profile mold 4 to be solidified and shaped under heating conditions, and the shaped profile is drawn out by the traction device 5 and cut off by the cutting device 6 to obtain A special-shaped bar with a specific length and a specific cross-sectional shape, and the solar cell frame can be obtained by assembling the special-shaped bar. Referring to FIG. 2 , FIG. 2 is a schematic structural diagram of a solar cell frame obtained in the present invention.

After obtaining the solar cell frame, perform a performance test on it, the results show that, compared with the aluminum profile solar cell frame, the weight of the solar cell frame provided by the present invention can be reduced by 1/3, and the cost can be reduced by 30% to 40%, and its The tensile strength can be increased by 1.5~5 times, the linear expansion coefficient can be reduced to 5~6, and the aging performance is far better than that of the aluminum profile solar cell frame.

In order to further illustrate the present invention, the solar cell frame provided by the present invention and the preparation method thereof are described in detail below in conjunction with examples.

Example 1

According to the process flow chart shown in Figure 1, the solar cell frame is prepared according to the following steps:

Unwind the multi-volume non-alkali glass roving from the creel 1 and export it through the yarn guide 2. The diameter of the single-volume non-alkali glass roving is 24 microns, and the number is 2400Tex;

100 parts by weight of unsaturated polyester resin, 4 parts by weight of zinc stearate, 2 parts by weight of tert-butyl perbenzoate, 0.08 parts by weight of PST low shrinkage machine and 0.5 parts by weight of anti-ultraviolet absorber are fully mixed and put into the dipping In the tank 3; the glass roving derived from the yarn guide 2 is fully soaked in the dipping tank 3 to form a fiber-reinforced resin with a glass fiber mass fraction of 70%; the fiber-reinforced resin is introduced into the profile mold 4, After heating, molding and solidification in the profile mold 4, pull it out with the traction device 5 and cut it off with the cutting device 6 to obtain a profile with a specific length and a specific cross-sectional shape, and assemble the profile to obtain a solar cell frame. The saturated polyester resin is an isophthalic unsaturated polyester resin.

The performance test of the fiber-reinforced thermosetting resin composite material used for the solar cell frame was carried out, and the results are shown in Table 1. Table 1 shows the performance test results of the solar cell frame provided by the embodiments and comparative examples of the present invention.

Example 2

According to the process flow chart shown in Figure 1, the solar cell frame is prepared according to the following steps:

Unwind the multi-volume non-alkali glass roving from the creel 1 and export it through the yarn guide 2. The diameter of the single-volume non-alkali glass roving is 24 microns, and the number is 2400Tex;

100 parts by weight of vinyl ester resin, 4 parts by weight of zinc stearate, 2 parts by weight of tert-butyl perbenzoate, 0.06 parts by weight of PST low shrinkage machine and 0.5 parts by weight of anti-ultraviolet absorber are fully mixed and put into the dipping tank 3; the glass roving derived from the yarn guide is fully infiltrated in the dipping tank 3 to form a fiber-reinforced resin with a glass fiber mass fraction of 70%; the fiber-reinforced resin is introduced into the profile mold 4, and in the profile mold In step 4, after thermoforming and solidification, pull it out with traction device 5 and cut it with cutting device 6 to obtain a profiled material with a specific length and a specific cross-sectional shape, and assemble the profiled material to obtain a solar cell frame, wherein the vinyl ester The resin is a vinyl ester resin obtained by reacting E44 epoxy resin with methacrylic acid and diluted with styrene.

The performance test of the fiber-reinforced thermosetting resin composite material used for the solar cell frame was carried out, and the results are shown in Table 1. Table 1 shows the performance test results of the solar cell frame provided by the embodiments and comparative examples of the present invention.

Example 3

According to the process flow chart shown in Figure 1, the solar cell frame is prepared according to the following steps:

Unwind the multi-volume non-alkali glass roving from the creel 1 and export it through the yarn guide 2. The diameter of the single-volume non-alkali glass roving is 24 microns, and the number is 2400Tex;

100 parts by weight of Shell epoxy resin 828, 4 parts by weight of zinc stearate, 18 parts by weight of 590 curing agent, 10 parts by weight of toughening agent and 0.5 parts by weight of anti-ultraviolet absorber are fully mixed and put into the dipping tank 3; The glass roving derived from the yarn guide 2 is fully soaked in the dipping tank 3 to form a fiber reinforced resin with a glass fiber mass fraction of 70%; the fiber reinforced resin is introduced into the profile mold 4, and in the profile mold 4 After thermoforming and solidification, pull it out with the pulling device 5 and cut it with the cutting device 6 to obtain a special-shaped material with a specific length and a specific cross-sectional shape, and assemble the special-shaped material to obtain a solar cell frame.

The performance test of the fiber-reinforced thermosetting resin composite material used for the solar cell frame was carried out, and the results are shown in Table 1. Table 1 shows the performance test results of the solar cell frame provided by the embodiments and comparative examples of the present invention.

Example 4

According to the process flow chart shown in Figure 1, the solar cell frame is prepared according to the following steps:

Unwind the multi-volume non-alkali glass roving from the creel 1 and export it through the yarn guide 2. The diameter of the single-volume non-alkali glass roving is 24 microns, and the number is 2400Tex;

100 parts by weight of polyurethane resin, 4 parts by weight of mold release agent and 0.5 parts by weight of anti-ultraviolet absorber are fully mixed and then put into dipping tank 3; the glass rovings derived from yarn guide 2 are fully soaked in dipping tank 3 to form Fiber-reinforced resin with a glass fiber mass fraction of 70%; the fiber-reinforced resin is introduced into the profiled material mold 4, heated and solidified in the profiled material mold 4, pulled out with a traction device 5 and cut by a cutting device 6 to obtain a A special-shaped bar with a specific length and a specific cross-sectional shape is assembled to obtain a solar cell frame, wherein the polyurethane resin is PUL2500 two-component liquid polyurethane produced by BAYER.

The performance test of the fiber-reinforced thermosetting resin composite material used for the solar cell frame was carried out, and the results are shown in Table 1. Table 1 shows the performance test results of the solar cell frame provided by the embodiments and comparative examples of the present invention.

Comparative example 1

The solar cell frame is prepared by using the solar cell frame aluminum profile sold by Zhangjiagang Huayang Metal Products Co., Ltd., and its performance test is carried out. The results are shown in Table 1. Table 1 is the performance test of the solar cell frame provided by the embodiments of the present invention and comparative examples. result.

Table 1 The performance test results of the solar cell frames provided by the embodiments of the present invention and comparative examples

As can be seen from Table 1, compared with the aluminum profile solar cell frame, the weight of the solar cell frame provided by the present invention can be reduced by 1/3, the cost can be reduced by 30% to 40%, and its tensile strength can be increased by 1.5 to 5 times. The linear expansion coefficient can be reduced to 5~6, and the aging performance is far better than that of the aluminum profile solar cell frame.

The above is only a preferred embodiment of the present invention, it should be pointed out that, for those of ordinary skill in the art, without departing from the principle of the present invention, some improvements and modifications can also be made, and these improvements and modifications can also be made. It should be regarded as the protection scope of the present invention.

Claims (8)

1. A solar cell frame, the material of which is a fiber-reinforced thermosetting resin; The thermosetting resin is polyurethane resin; The mass fraction of the fibers in the fiber-reinforced thermosetting resin is 30%-80%. 2 . The solar cell frame according to claim 1 , wherein the fibers are long fibers or long fiber fabrics. 3. The solar cell frame according to claim 1, wherein the fiber is one or more of glass fiber, polymer fiber, carbon fiber, hemp fiber and bamboo fiber. 4. The solar cell frame according to claim 1, wherein the fiber-reinforced thermosetting resin further comprises one of an antioxidant, a stabilizer, a toughening agent, a release agent and an anti-ultraviolet aging agent or more. 5. A preparation method for a solar cell frame, comprising the following steps: The fiber is soaked in the resin mixture and then molded and solidified in a mold to obtain a fiber-reinforced thermosetting resin profile. The resin mixture includes a resin and a curing agent, and the resin is polyurethane resin; the fiber accounts for the fiber-reinforced The mass fraction of thermosetting resin is 30% to 80%; Assemble the fiber-reinforced thermosetting resin profiles to obtain a solar cell frame. 6. The preparation method according to claim 5, characterized in that, the resin mixture further comprises a catalyst. 7. The preparation method according to claim 6, wherein the resin mixture further comprises one or more of an antioxidant, a stabilizer, a toughening agent, a release agent and an anti-ultraviolet aging agent. 8. The preparation method according to claim 5, characterized in that, the fibers are long fibers or fiber fabrics.