CN210110803U - Light backboard for photovoltaic module and light photovoltaic module applying light backboard - Google Patents
Light backboard for photovoltaic module and light photovoltaic module applying light backboard Download PDFInfo
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Abstract
The utility model discloses a light backboard for a photovoltaic module and a light photovoltaic module using the same, wherein the light backboard at least comprises a thermoplastic core layer and a first thermoplastic substrate layer which are compounded into a whole through hot melting and pressurization; the base material of the thermoplastic core layer is a core layer thermoplastic polymer, the base material of the first thermoplastic substrate layer is a substrate layer thermoplastic polymer, and the core layer thermoplastic polymer is the same as the substrate layer thermoplastic polymer in material or at least can realize hot melt compounding; the thermoplastic core layer is in a honeycomb shape or a porous foaming shape; the light backboard can simultaneously replace a metal frame to be used as a lining plate structure of the photovoltaic module; the utility model discloses have light, safe and reliable, the no frame design simultaneously and be difficult to the deposition and need not ground connection, its version can be changeable advantage in a flexible way, avoid traditional dual glass assembly's high problem of bursting, moreover the utility model discloses accord with the photovoltaic standard demand completely, can realize true scale popularization and application.
Description
Technical Field
The utility model belongs to the photovoltaic packaging technology, concretely relates to light backplate for photovoltaic module, the utility model discloses light photovoltaic module that this light backplate used has still been related to.
Background
Reliability, safety and low cost are requirements that any energy product must meet at the same time. In the past decades, the photovoltaic industry has been reducing the cost of photovoltaic products by as much as 300 times over the past 40 years by continuing and focusing on research and development to improve the efficiency of photoelectric conversion, the supply chain, and the home-made and automated means of production facilities. Of course, these last decades have been very significant and effective in reducing the cost of photovoltaic cells almost to the utmost, and bottlenecks are about to be encountered both at the limit of conversion efficiency and in production scale effects, and therefore, more technological innovation is required for photovoltaic module products.
The applicant notices that in the photovoltaic module before twenty years, the price of the photovoltaic cell is far higher than that of the packaging structure, and the initial photovoltaic module product has to use the packaging structures such as heavy glass and thick aluminum frames to carefully care the golden photovoltaic cell and exert the power generation function of the cell to the maximum extent. However, with the achievement of extreme cost through technical innovation in recent decades on photovoltaic cells, the structural distribution of the cost of the cells and the packaging material in the photovoltaic module product is reversed, the cost of the packaging material begins to exceed the cost of the cells, that is, the cells are relatively cheap, so that new photovoltaic module cell structure technologies such as double-sided, half-sheet and laminated tile are available at present, and the maximum utilization rate of the packaging material is strived for through the structure. People have changed from "caring for batteries" to "protecting packaging materials with pitfalls".
Furthermore, in the packaging structure of the conventional photovoltaic module product, the glass for light receiving surface packaging and the aluminum frame mounted on the back occupy most of the packaging structure cost, and the additional labor cost and the construction difficulty of carrying, packaging, transporting, constructing, grounding requirements and the like caused by the use of the glass and the metal aluminum frame are not negligible. In addition, the photovoltaic module product which is packaged by adopting the glass and the metal aluminum frame can further cause safety problems due to heavy weight.
For this reason, in the last five years, the applicant has been dedicated to focus on high-quality technical innovation of the photovoltaic module packaging structure and packaging material, and has proposed more packaging schemes of photovoltaic module products with flexible mounting effect; and along with the research and development of being absorbed in the photovoltaic encapsulation field of the applicant and the continuous and deep research of being absorbed in two decades in the photovoltaic industry based on the applicant utility model, and leading the development achievement of reducing the cost and promoting the technical innovation in the photovoltaic industry scale in China, the discovery develops the light photovoltaic module and can be the innovation development direction of the next step of breaking through the photovoltaic product encapsulation technology.
In this direction, the applicant proposes a technical solution of a lightweight photovoltaic module, and before the application is proposed, a systematic and comprehensive investigation, search and analysis are performed on the light photovoltaic module packaging technology which has been proposed so far, and the following comparison documents are listed:
comparison document 1: chinese patent publication No. CN109390422A discloses a lightweight flexible photovoltaic module, which is proposed to adopt a structure of a first substrate layer, a honeycomb core layer, and a second substrate layer stacked in sequence as a back sheet layer, so as to reduce the thickness and eliminate the design of a metal aluminum frame, thereby achieving a lightweight effect, wherein the first substrate layer and the second substrate layer may adopt epoxy resin insulating layers or metal layers, the honeycomb core layer, the first substrate layer and the second substrate layer are bonded and compounded into a whole by adhesives, and in order to prevent the honeycomb core composite back sheet from bubbling and degumming during the lamination process, an exhaust hole is provided in the core layer and penetrates through the substrate layers, and the structure inevitably causes severe reduction of the strength of the structure and blocking water vapor permeability, and is difficult to be really applied.
Comparison document 2: the invention patent of CN109192801A discloses a lightweight photovoltaic module and a preparation method thereof, the lightweight photovoltaic module includes a transparent front film, a reinforcing plate, a first adhesive film layer, a solar cell, a second adhesive film layer, a first substrate layer, a third adhesive film layer, a honeycomb core layer, a fourth adhesive film layer and a second substrate layer, which are sequentially stacked.
Comparison document 3: PCT publication No. WO 2018/013618 Al discloses a photovoltaic module laminated structure for replacing an aluminum frame mounting structure, and proposes to use a polyethylene foam layer, and to bond composite polypropylene glass fiber material layers on upper and lower surfaces of the polyethylene foam layer through adhesive layers, for replacing the aluminum frame mounting structure.
Although these documents propose a structure using a substrate layer and a honeycomb core layer to directly replace a back panel and an aluminum frame, these technologies all use an adhesive layer or a glue film layer to realize the connection and combination between the substrate layer and the honeycomb core layer, however, as mentioned in reference 1, the composite structure applied to a photovoltaic back panel can cause the problems of bubbling, degumming, deformation and creep during subsequent lamination, which leads to a serious influence on the effect of the final photovoltaic module product, and the conventional idea of the photovoltaic packaging technology is that the glue film layer is used to perform the connection and combination between the functional material layers and the glue is used to perform the connection and combination, which is also the conventional molding and combination process of a conventional honeycomb panel or a conventional foam panel, which also leads to the light photovoltaic module solutions in the above-mentioned references 1-3 to realize the combination by the conventional glue film or glue after the substrate layer and the honeycomb core layer are respectively subjected to technical development, after the applicant searches intensively, the applicant finds that in order to solve the problems of the composite structures, either the vent structure is arranged or the composite effect is directly sacrificed. Therefore, the application of the technologies is basically at the laboratory certification or small test level, and the large-scale popularization and application cannot be really implemented.
Based on the current situation, the market urgently needs to find a lightweight photovoltaic module solution which can be popularized and applied in a large scale.
Disclosure of Invention
In view of this, the utility model aims at providing a light backplate for photovoltaic module and light photovoltaic module who uses thereof has light, safe and reliable, the frame-free design simultaneously and is difficult to the deposition and need not ground connection, advantage that its version can be changeable in a flexible way, avoids traditional dual glass assembly's high problem of bursting, moreover the utility model discloses accord with the photovoltaic standard demand completely, can realize true scale popularization and application.
Before explaining the technical scheme of the present invention, the applicant further explains the development of the technical scheme by: firstly, the applicant considers that the lamination compounding of the material functional layer in the photovoltaic packaging scheme through the adhesive film layer is a technical prejudice, and the applicant finds that the lamination compounding can be solved through targeted screening of the material layer and new process application, and further, the problems of bubbling, degumming, deformation and creep can be solved. In order to realize the technical purpose of the utility model, the applicant has broken the thinking limitation that the encapsulating material kind within range was filtered and is used at present photovoltaic encapsulation field forcefully, specifically has the capital research and development background and theoretical knowledge level in different fields separately based on this application inventor, through the screening verification to packaging structure requirement and traditional trade combined material simultaneously, finally obtains the utility model discloses a light backplate innovation scheme for photovoltaic module.
The utility model adopts the technical scheme as follows:
a lightweight backsheet for a photovoltaic module, comprising at least a thermoplastic core layer and a first thermoplastic substrate layer which are compounded into one body by hot melt pressing; the base material of the thermoplastic core layer is a core layer thermoplastic polymer, the base material of the first thermoplastic substrate layer is a substrate layer thermoplastic polymer, and the core layer thermoplastic polymer is the same as the material of the substrate layer thermoplastic polymer or at least can realize hot-melt compounding; and the thermoplastic core layer is in a honeycomb shape or a porous foaming shape; the light backboard can simultaneously replace a metal frame to serve as a lining plate structure of the photovoltaic module.
Preferably, the thermoplastic polymer of the core layer or the thermoplastic polymer of the substrate layer is thermoplastic polypropylene or PET or PA or PC or PE.
Preferably, the thermoplastic substrate layer is a composite of continuous fiber reinforced substrate layers and thermoplastic polymers.
Preferably, the thermoplastic substrate layer adopts a single-layer unidirectional tape or a multi-layer unidirectional tape laminated structure.
Preferably, the thermoplastic core layer is in direct contact connection with the back side adhesive film layer of the photovoltaic module.
Preferably, a second thermoplastic substrate layer is compounded on the other surface of the thermoplastic core layer, and the second thermoplastic substrate layer is directly connected with the back adhesive film layer of the photovoltaic module in a contact mode.
Preferably, the thickness of the thermoplastic core layer ranges from 5 to 25 mm; the thickness of the thermoplastic substrate layer ranges from 0.05mm to 5 mm.
Preferably, the light photovoltaic module comprises a front flexible composite material layer, a front packaging adhesive film layer, a battery sheet layer, a back packaging adhesive film layer and a light backboard which are compositely packaged into a whole, wherein the light backboard adopts the light backboard for the photovoltaic module, and the light backboard replaces a metal frame as a lining plate structure.
Preferably, the front flexible composite material layer is made of acrylic thermosetting powder coating composite fiber cloth.
Preferably, the light photovoltaic module further comprises a fluoroplastic film layer, and the fluoroplastic film layer is located above the front-side flexible composite material layer
It should be noted that the thermoplastic core layer in the honeycomb shape or the porous foamed shape according to the present invention can be obtained by direct purchase from the composite material enterprises in the current market; these combined materials are owing to have the light characteristic of giving sound insulation and be applied to fields such as high-speed railway, aerospace, car, building materials and packing more widely and realize the function of giving sound insulation, the utility model discloses do not specially limit to its concrete preparation forming process, typical preparation technology can select to be: the honeycomb-shaped thermoplastic core layer is formed by adopting a hot-melt extrusion process; the thermoplastic core layer in the porous foaming shape is formed by adopting a foaming process, and the processes belong to the common knowledge in the field of composite materials, so that the utility model is not explained one by one.
As mentioned above, although these composite materials with thermoplastic core layer are widely used in the fields of high-speed rail, aerospace, automobile, building materials, and packaging, the photovoltaic industry has various self-specific standard requirements for back sheet such as water vapor barrier property, tensile strength, fire resistance, and insulation, and it is necessary to adopt the component lamination process and the requirement for mass production while performing material screening, which is a problem that those skilled in the art cannot find reference information or technical teaching from the prior art, and creative development and exploration are required:
the invention provides a honeycomb-shaped or porous foaming thermoplastic core layer and a thermoplastic substrate layer as a layer structure of a light backboard by combining with the funding research and development background and theoretical knowledge levels of different fields of the inventor, after screening composite materials and applying the composite materials to the integral test of a photovoltaic assembly product, simultaneously, the base material of the thermoplastic core layer is the same as the base material of the thermoplastic substrate layer or at least can realize hot melting compounding, and the base material of the thermoplastic substrate layer are directly subjected to hot melting compounding molding to obtain the light backboard structure The problems of degumming, deformation, creep and the like effectively ensure the lamination quality of the light photovoltaic module, the yield is high during scale lamination, and performance tests prove that the utility model completely meets the requirements of photovoltaic standards and can realize real scale popularization and application; compared with the traditional photovoltaic module back plate structure, the light back plate for the photovoltaic module has the advantages that the light back plate for the photovoltaic module has light weight, safety and reliability, is not easy to accumulate dust due to the frameless design, does not need grounding, can flexibly and changeably form, avoids the high bursting problem of the traditional double-glass module and other positive technical effects, and is a powerful technical solution for breaking through the next step of innovation and development direction of the photovoltaic product packaging technology;
the utility model discloses further preferably propose adopt thermoplastic polypropylene as the base material of thermoplastic sandwich layer and thermoplastic base plate layer simultaneously, the applicant finds that thermoplastic polypropylene has very excellent separation steam permeability's performance, has good weatherability simultaneously, combines it to be applied to the utility model discloses a light backplate structure, can further effectively improve the performance of the utility model discloses light backplate for photovoltaic module;
the utility model discloses still further preferably provide the combined material who adopts continuous fibers reinforcing base plate layer thermoplastic polymer as the preparation material on the thermoplastic base plate layer, continuous fibers is the disperse phase, base plate layer thermoplastic polymer is the continuous phase, especially carries out the multilayer complex back with it in the equidirectional not, can further strengthen the tensile strength on the thermoplastic base plate layer, improves the compressive strength of whole photovoltaic module installation.
Drawings
Fig. 1 is a schematic structural view of a light back plate 100a for a photovoltaic module according to embodiment 1 of the present invention;
FIG. 2 is a schematic diagram of the exploded layer structure of FIG. 1;
fig. 3 is a schematic view of a layer structure of a light photovoltaic module 10a according to embodiment 1 of the present invention;
fig. 4 is a schematic structural view of a light back plate 100b for a photovoltaic module according to embodiment 2 of the present invention;
FIG. 5 is a schematic view of the exploded layer structure of FIG. 4;
fig. 6 is a schematic view of a layer structure of a light photovoltaic module 10b according to embodiment 2 of the present invention;
fig. 7 is a schematic structural view of a light back plate 100c for a photovoltaic module according to embodiment 3 of the present invention;
FIG. 8 is a schematic view of the exploded layer structure of FIG. 7;
fig. 9 is a schematic view of a layer structure of a light photovoltaic module 10c according to embodiment 3 of the present invention;
fig. 10 is a schematic view of a layer structure of a light photovoltaic module 10d according to embodiment 12 of the present invention.
Detailed Description
The embodiment of the utility model discloses a light backboard for a photovoltaic module, which at least comprises a thermoplastic core layer and a first thermoplastic substrate layer which are compounded into a whole through hot melting and pressurization; the base material of the thermoplastic core layer is a core layer thermoplastic polymer, the base material of the first thermoplastic substrate layer is a substrate layer thermoplastic polymer, and the core layer thermoplastic polymer is the same as the substrate layer thermoplastic polymer in material or at least can realize hot melt compounding; the thermoplastic core layer is in a honeycomb shape or a porous foaming shape; the light backboard can simultaneously replace a metal frame to serve as a lining plate structure of the photovoltaic module.
The embodiment of the utility model provides a still disclose a light photovoltaic module, light photovoltaic module includes flexible combined material layer in positive, positive encapsulation glued membrane layer, battery lamella, back encapsulation glued membrane layer and the light backplate of composite packaging as an organic whole, wherein, the light backplate adopts as above light backplate for photovoltaic module, light backplate replaces metal frame simultaneously as welt structure.
In order to make the technical solutions in the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, but not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts shall belong to the protection scope of the present invention.
Example 1:
referring to fig. 1 and 2, a light backsheet 100a for a photovoltaic module includes a thermoplastic core layer 110 and a first thermoplastic substrate layer 120, which are integrated by hot melting and pressing, wherein the thermoplastic core layer 110 is directly connected to a back adhesive film layer of the photovoltaic module in a contact manner; wherein, the base material of the thermoplastic core layer 110 is a core layer thermoplastic polymer, the base material of the first thermoplastic substrate layer 120 is a substrate layer thermoplastic polymer, and the core layer thermoplastic polymer is the same as the substrate layer thermoplastic polymer; in the present embodiment, the thermoplastic core layer 110 is in a polygonal honeycomb shape, the thickness range is 5-25mm, and the thermoplastic core layer is formed by a hot-melt extrusion process or other known forming processes in composite materials, which is not specifically limited in the specific implementation of the present invention; the thickness of the first thermoplastic substrate layer 120 ranges from 0.05mm to 5 mm; preferably, in this embodiment, thermoplastic polypropylene is used for both the core layer thermoplastic polymer and the substrate layer thermoplastic polymer, the thickness of the thermoplastic core layer 110 is 8mm, and the thickness of the first thermoplastic substrate layer 120 is in the range of 1 mm; in other embodiments, other thicknesses of the thermoplastic core layer 110 may be selected, such as 2mm, 3mm, 5mm, 10mm, 12mm, 14mm, 15mm, 20mm, 25 mm; other thicknesses of the first thermoplastic substrate layer 120 may also be selected, such as 0.05mm,0.1mm,0.2mm,0.3mm, 0.4mm, 0.6mm, 0.8mm, 1.5mm, 2mm, 2.5mm, 3mm, 3.5mm, 4mm, 4.5mm, 5 mm; the thickness of the thermoplastic core layer 110 is greater than that of the first thermoplastic substrate layer 120 in general, and otherwise the advantage of light weight is relatively insignificant;
preferably, in the present embodiment, the weight per unit area of the lightweight backsheet 100a ranges from 60 to 2500g/m2More preferably, in the present embodiment, the weight per unit area of the lightweight back sheet 100a ranges from 60 to 500g/m2(ii) a Specifically, in the present embodiment, the weight per unit area of the lightweight back sheet 100a is 100g/m2The light backboard 100a of the embodiment can replace a metal frame as a lining board structure of the photovoltaic module;
preferably, referring to fig. 3, the present embodiment further provides a light photovoltaic module 10a, including a front flexible composite material layer 11, a front encapsulation adhesive film layer 12, a battery sheet layer 13, a back encapsulation adhesive film layer 14, and a light backsheet, which are compositely encapsulated into a whole, where the light backsheet 100a for a photovoltaic module according to the present embodiment is adopted, and the light backsheet 100a simultaneously replaces a metal frame as a liner structure; preferably, in the present embodiment, in order to achieve the effect of further light weight and flexibility of the photovoltaic module 10a, the front flexible composite material layer 11 is made of acrylic thermosetting powder coating composite fiber cloth, and the specific technical solution thereof can be directly referred to CN 201610685536.0;
preferably, the present embodiment further proposes a method for preparing a lightweight photovoltaic module 10a, comprising the following steps:
B10) sequentially laminating and laying the front side packaging layer 12, the battery piece 11, the back side adhesive film layer 13 and the light backboard 100a for the photovoltaic module in a laminating device;
B20) the laminating equipment obtains the laminating piece by heating and pressurizing the laminated laying piece, wherein the heating and pressurizing comprises a first heating stage, a second heating stage and a third pressurizing and cooling stage, the heating temperature range of the first stage is 110-; the heating temperature range of the second stage is 130-; the cooling temperature range of the third stage is 25-60 ℃, and the applied pressure range is 0.05-0.25 Mpa;
B30) the laminate is edge cut to provide the lightweight photovoltaic module 10a described above.
Example 2: the rest of the technical solutions of this embodiment 2 are the same as those of embodiment 1, except that: referring to fig. 4, 5 and 6, the present embodiment 2 provides a lightweight photovoltaic module 10b, which includes a lightweight back sheet 100b, wherein a thermoplastic core layer 110b of the lightweight back sheet 100b is in a porous foamed shape, and is formed by a foaming process.
Example 3: the rest of the technical solutions of this embodiment 3 are the same as those of embodiment 1, except that: referring to fig. 7, 8 and 9, this embodiment 3 provides a light photovoltaic module 10c, which includes a light backsheet 100c, wherein a second thermoplastic substrate layer 130 is further compounded on the other surface of the thermoplastic core layer 110 of the light backsheet 100c, and the second thermoplastic substrate layer 130 is directly connected to the back adhesive film layer 13 of the photovoltaic module 10c in a contact manner.
Example 4: the rest of the technical solutions of this embodiment 4 are the same as those of embodiment 1, except that: in this embodiment 4, the thermoplastic substrate layer 120 is made of a composite material of thermoplastic polymers of a continuous fiber reinforced substrate layer, the continuous fiber is in a dispersed phase, and the thermoplastic polymer of the substrate layer is in a continuous phase; specifically, in the present embodiment, the continuous fiber is a continuous glass fiber, and in other embodiments, a prior art continuous fiber having a similar effect to the continuous glass fiber, such as a continuous carbon fiber or a continuous aramid fiber, may also be used; in this embodiment, the thermoplastic substrate layer 120 is a single unidirectional tape, wherein the single unidirectional tape is prepared by the following steps:
A10) heating and melting a thermoplastic polymer raw material of the substrate layer in advance, and impregnating the thermoplastic polymer of the substrate layer in a molten state with continuous fibers;
A20) and extruding the continuous fibers impregnated with the thermoplastic polymer of the substrate layer into a unidirectional tape.
Example 5: the rest of the technical solutions of this embodiment 5 are the same as those of embodiment 4, except that: in this example 5, the thermoplastic substrate layer 120 employs a multi-layer unidirectional tape laminate structure, wherein the process for preparing the multi-layer unidirectional tape laminate employs the following steps:
A10) heating and melting a thermoplastic polymer raw material of the substrate layer in advance, and impregnating the thermoplastic polymer of the substrate layer in a molten state with continuous fibers;
A20) extruding the continuous fiber impregnated with the thermoplastic polymer of the substrate layer into a unidirectional tape;
A30) the unidirectional tapes are laminated for multiple times in a manner of 90 degrees or 45 degrees, and through heating and pressurizing, thermoplastic polymers of substrate layers of the unidirectional tapes of different layers are melted, soaked mutually, and simultaneously fully wrap continuous fibers to obtain a multilayer unidirectional tape lamination, specifically, in the embodiment 5, the multilayer unidirectional tape lamination adopts a 4-layer unidirectional tape lamination.
Example 6: the rest of the technical solutions of this embodiment 6 are the same as those of embodiment 1, except that: in this example 6, PET (abbreviation for Polyethylene terephthalate) was used for both the core layer thermoplastic polymer and the substrate layer thermoplastic polymer.
Example 7: the rest of the technical solutions of this embodiment 7 are the same as those of embodiment 1, except that: in this example 7, PA (abbreviation for Polyamide, meaning Polyamide) was used for both the core layer thermoplastic polymer and the substrate layer thermoplastic polymer.
Example 8: the rest of the technical solutions of this embodiment 8 are the same as those of embodiment 1, except that: in this example 8, PC (abbreviation for Polycarbonate) was used for both the core layer thermoplastic polymer and the substrate layer thermoplastic polymer.
Example 9: the rest of the technical solutions of this embodiment 9 are the same as those of embodiment 1, except that: in this example 9, PE (Polyethylene, abbreviation) was used for both the core layer thermoplastic polymer and the substrate layer thermoplastic polymer.
Example 10: the rest of the technical solutions of this embodiment 10 are the same as those of embodiment 5, except that: in this example 10, PET in example 6 or PA in example 7 or PC in example 8 or PE in example 9 was used for both the core layer thermoplastic polymer and the substrate layer thermoplastic polymer.
Example 11: the rest of the technical solutions of this embodiment 11 are the same as those of embodiment 1, except that: in this example 11, the core layer thermoplastic polymer is thermoplastic polypropylene and the substrate layer thermoplastic polymer is PET in example 6 or PA in example 7 or PC in example 8 or PE in example 9.
Example 12: the rest of the technical solutions of this embodiment 12 are the same as those of embodiment 3, except that: as shown in fig. 10, in the embodiment 12, the light photovoltaic module 10d further includes a fluoroplastic film layer 15, and the fluoroplastic film layer 15 is located above the front-side flexible composite material layer 11, so as to further improve the weather resistance.
It should be noted that in the light photovoltaic module of the present application, a person skilled in the art may also add other material layer structures between the back adhesive layer 13 and the light backsheet layer according to the application requirements, and these combined applications may also have the technical effects of the present application, and also belong to the protection scope of the present application.
Comparative example 1: the lightweight photovoltaic module proposed in reference 1 was used.
Comparative example 2: the lightweight photovoltaic module proposed in reference 2 was used.
Comparative example 3: the lightweight photovoltaic module proposed in reference 3 was used.
Comparative example 4: photovoltaic modules employing prior art conventional transparent back sheet applications.
Comparative example 5: adopt prior art's dual-glass photovoltaic module.
In the present application, the photovoltaic modules are applied, installed and implemented in the above embodiments and comparative examples, and the implementation effect is compared, and the main comparison results refer to table 1 below:
table 1 comparison of the effects of the embodiments of the present invention and the comparative examples
The test standard basis of the water vapor permeability resistance is GB/T26253-.
As can be seen from table 1 above, in this example, after the existing conventional composite material is subjected to targeted screening and applied, a photovoltaic module lightweight backplane solution can be obtained that has multi-aspect positive technical effects at the same time, also, by the technical effects of example 5 and example 10 of the present application, it was surprisingly found that a multilayer unidirectional tape laminate structure made of a thermoplastic polymer of a continuous fiber-reinforced substrate layer is used as a substrate layer structure, the applicant finds that the composite material is superior to continuous fibers in a dispersed phase and a substrate layer thermoplastic polymer in a continuous phase, and can realize a very good and unique cladding fusion structure after the two are subjected to multilayer compounding in different directions, so that the performances of the tensile strength and the water vapor barrier property are obvious. Since the material cost adopted in the embodiment 10 is obviously higher than that of the embodiment 5, the embodiment 5 is the most preferable embodiment of the present application;
it is found through a large number of applications that the thermoplastic core layer 110 can be compounded with the double-sided thermoplastic substrate layer according to the technical scheme described in embodiment 3, or can be directly compounded with the back adhesive film layer 13 of the photovoltaic module, which has little difference in technical effects, can effectively save one thermoplastic substrate layer, reduce material cost, and simplify the compounding process, and belongs to the preferred embodiment.
This application further verifies by example 11 that backsheets of different materials but heat-fusible composite are found to be less effective in lamination than backsheets of the same material.
It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (10)
1. A light backboard for a photovoltaic module is characterized by at least comprising a thermoplastic core layer and a first thermoplastic substrate layer which are compounded into a whole through hot melting and pressurization; the base material of the thermoplastic core layer is a core layer thermoplastic polymer, the base material of the first thermoplastic substrate layer is a substrate layer thermoplastic polymer, and the core layer thermoplastic polymer is the same as the material of the substrate layer thermoplastic polymer or at least can realize hot-melt compounding; and the thermoplastic core layer is in a honeycomb shape or a porous foaming shape; the light backboard can simultaneously replace a metal frame to serve as a lining plate structure of the photovoltaic module.
2. The lightweight backsheet for photovoltaic modules according to claim 1, wherein said core thermoplastic polymer or said substrate layer thermoplastic polymer is thermoplastic polypropylene or PET or PA or PC or PE.
3. The light backsheet for a photovoltaic module according to claim 1, wherein said thermoplastic substrate layer is a composite of continuous fiber reinforced substrate layer thermoplastic polymers.
4. The lightweight backsheet for photovoltaic modules according to claim 3, wherein said thermoplastic substrate layer is a single unidirectional tape or a multilayer unidirectional tape laminate structure.
5. A lightweight backsheet for photovoltaic modules according to claim 1 or 2 or 3 or 4, wherein said thermoplastic core layer is attached in direct contact with the back adhesive film layer of the photovoltaic module.
6. The light backsheet for photovoltaic modules according to claim 1, 2, 3 or 4, wherein a second thermoplastic substrate layer is further compounded on the other side of the thermoplastic core layer, and the second thermoplastic substrate layer is directly connected with the back adhesive film layer of the photovoltaic module in a contact manner.
7. A lightweight backsheet for photovoltaic modules according to claim 1 or 2 or 3 or 4, wherein said thermoplastic core layer has a thickness in the range of 5-25 mm; the thickness of the thermoplastic substrate layer ranges from 0.05mm to 5 mm.
8. A light photovoltaic module is characterized by comprising a front flexible composite material layer, a front packaging adhesive film layer, a battery sheet layer, a back packaging adhesive film layer and a light backboard which are compositely packaged into a whole, wherein the light backboard adopts the light backboard for the photovoltaic module as claimed in any one of claims 1 to 7, and the light backboard replaces a metal frame as a lining board structure.
9. The lightweight photovoltaic module of claim 8, wherein the front side flexible composite layer is an acrylic thermoset powder coated composite fiber cloth.
10. The lightweight photovoltaic module of claim 8 or 9 further comprising a fluoroplastic film layer disposed over said frontside flexible composite layer.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921203359.3U CN210110803U (en) | 2019-07-29 | 2019-07-29 | Light backboard for photovoltaic module and light photovoltaic module applying light backboard |
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| CN201921203359.3U CN210110803U (en) | 2019-07-29 | 2019-07-29 | Light backboard for photovoltaic module and light photovoltaic module applying light backboard |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110400853A (en) * | 2019-07-29 | 2019-11-01 | 上迈(镇江)新能源科技有限公司 | Photovoltaic module lightweight backboard and its photovoltaic module and preparation method of application |
| DE102021200607A1 (en) | 2021-01-25 | 2022-07-28 | Karl Wohllaib GmbH Produktionstechnik | photovoltaic module |
| CN115519869A (en) * | 2022-09-01 | 2022-12-27 | 北京金茂绿建科技有限公司 | Photovoltaic back plate, photovoltaic module and preparation method of photovoltaic back plate |
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2019
- 2019-07-29 CN CN201921203359.3U patent/CN210110803U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110400853A (en) * | 2019-07-29 | 2019-11-01 | 上迈(镇江)新能源科技有限公司 | Photovoltaic module lightweight backboard and its photovoltaic module and preparation method of application |
| DE102021200607A1 (en) | 2021-01-25 | 2022-07-28 | Karl Wohllaib GmbH Produktionstechnik | photovoltaic module |
| CN115519869A (en) * | 2022-09-01 | 2022-12-27 | 北京金茂绿建科技有限公司 | Photovoltaic back plate, photovoltaic module and preparation method of photovoltaic back plate |
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