A lightweight photovoltaic module and photovoltaic system

Abstract

The present application relates to the field of photovoltaic technology, and particularly relates to a light-weight photovoltaic module and a photovoltaic system. The light-weight photovoltaic module comprises a fiber front plate, a fiber front adhesive film, a cell layer, a fiber rear adhesive film and a fiber rear plate, the upper surface of the fiber front plate and the cell layer are bonded by the fiber front adhesive film, and the lower surface of the cell layer and the fiber rear plate are bonded by the fiber rear adhesive film; the fiber front plate and / or the fiber rear plate comprises a fluorine-containing weather-resistant layer and a fiber support layer, the upper and lower surfaces of the fiber support layer are bonded with the fluorine-containing weather-resistant layer; and the fiber support layer comprises a fiber material. The light-weight photovoltaic module of the present application has the structural properties of high strength and rigidity while being light in weight. Moreover, due to the high strength and rigidity of the light-weight photovoltaic module, the cell layer is not prone to hidden cracking when the light-weight photovoltaic module is impacted by hail in severe hail weather, thereby ensuring the power generation of the light-weight photovoltaic module.

Description

Technical Field

[0001] This invention relates to the field of photovoltaic technology, and in particular to a lightweight photovoltaic module and photovoltaic system. Background Technology

[0002] Solar photovoltaic (PV) modules are the core and most important component of a solar power generation system. Their function is to convert solar energy into electrical energy, which can then be either stored in batteries or used to power loads.

[0003] To make better use of space, solar photovoltaic modules can be installed on the roof. However, existing factory roofs are generally constructed with materials such as corrugated steel sheets and waterproof membranes, which have low load-bearing capacity. To install photovoltaic modules, the modules must be lightweight.

[0004] Photovoltaic modules typically include glass, which is relatively heavy, resulting in a heavy module that is unsuitable for rooftop installation. Using lightweight materials in the manufacture of photovoltaic modules can reduce their weight. However, current technologies using lightweight materials for photovoltaic modules suffer from drawbacks such as a higher number of structural layers and more complex manufacturing processes. Furthermore, lightweight photovoltaic modules have lower strength and greater flexibility, making them susceptible to microcracks in the photovoltaic cells from hail impacts, thus affecting the module's power generation. Summary of the Invention

[0005] In view of this, the present invention aims to propose a lightweight photovoltaic module to solve or partially solve the problem that existing lightweight photovoltaic modules have low strength and are prone to microcracks in photovoltaic cells when subjected to hail impacts in severe hail weather, thereby affecting the power generation of the photovoltaic module.

[0006] To achieve the above objectives, the technical solution of the present invention is implemented as follows:

[0007] First aspect: This invention provides a lightweight photovoltaic module, comprising: a fiber front plate, a fiber front adhesive film, a battery layer, a fiber back adhesive film, and a fiber back plate. The upper surfaces of the fiber front plate and the battery layer are bonded together by the fiber front adhesive film, and the lower surface of the battery layer and the fiber back plate are bonded together by the fiber back adhesive film. The fiber front plate and / or the fiber back plate include a fluorinated weather-resistant layer and a fiber support layer. The upper and lower surfaces of the fiber support layer are bonded to the fluorinated weather-resistant layer. The fiber support layer comprises fiber material.

[0008] Optionally, the thickness of the fiber support layer ranges from 100 μm to 800 μm.

[0009] Optionally, the basis weight of the fiber support layer ranges from 100g / m² to 900g / m².

[0010] Optionally, the thickness of the fluorinated weather-resistant layer ranges from 5 μm to 100 μm.

[0011] Optionally, the fiber front plate includes the fluorinated weather-resistant layer and the fiber support layer, wherein the fiber support layer comprises the following components in the following mass percentages: polyethylene terephthalate 40-80%, fiber material 10-55%, and additives 2-10%.

[0012] Optionally, the fiber pre-coating film comprises the following components in weight percentages: 55-95% film and 5-45% fiber material.

[0013] Optionally, the fiber backing includes the fluorinated weather-resistant layer and the fiber support layer, wherein the fiber support layer comprises the following components in the following mass percentages: 50-75% polyethylene terephthalate, 10-30% fiber material, 5-10% titanium dioxide, and 5-10% additives.

[0014] Optionally, the fiber-coated film comprises the following components in weight percentages: 55-75% film, 20-45% fiber material, and 0-5% titanium dioxide.

[0015] Optionally, the fiber material includes glass fiber, carbon fiber, ultra-high molecular weight polyethylene fiber, polyaramid (aramid) fiber, poly(p-phenylenebenzodioxazole) fiber, or boron fiber.

[0016] Secondly, embodiments of the present invention provide a photovoltaic system, including the aforementioned lightweight photovoltaic module.

[0017] The lightweight photovoltaic module of this invention comprises a fiber front panel, a fiber front encapsulant film, a battery layer, a fiber rear encapsulant film, and a fiber rear panel, all in a single layer. The number of layers in the lightweight photovoltaic module is the same as that of a conventional single-glass module, making the process clear and simple to manufacture, with a shorter production time per module. The fiber support layer of the fiber front panel and / or fiber rear panel includes fiber material, which improves the strength and stiffness of the fiber front panel and / or fiber rear panel. Therefore, the lightweight photovoltaic module possesses both light weight and high structural strength and stiffness. Furthermore, due to its high strength and stiffness, the battery layer is less prone to microcracks under hail impacts, thus ensuring the power generation of the lightweight photovoltaic module.

[0018] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention and to implement it in accordance with the contents of the specification, and in order to make the above and other objects, features and advantages of the present invention more apparent and understandable, specific embodiments of the present invention are described below. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments of the present invention will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort:

[0020] Figure 1 This is a schematic diagram of the structure of a lightweight photovoltaic module according to an embodiment of the present invention.

[0021] Explanation of reference numerals in the attached figures:

[0022] 1-Fiber front panel; 2-Fiber front adhesive film; 3-Battery layer; 4-Fiber back adhesive film; 5-Fiber back panel. Detailed Implementation

[0023] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] Reference Figure 1 The diagram illustrates a structural schematic of a lightweight photovoltaic module according to an embodiment of the present invention. The lightweight photovoltaic module includes: a fiber front panel 1, a fiber front adhesive film 2, a battery layer 3, a fiber back adhesive film 4, and a fiber back panel 5. The upper surfaces of the fiber front panel 1 and the battery layer 3 are bonded together by the fiber front adhesive film 2, and the lower surface of the battery layer 3 and the fiber back panel 5 are bonded together by the fiber back adhesive film 4.

[0025] Specifically, according to the direction of sunlight, the structure of a lightweight photovoltaic module consists of five layers: the first layer is the fiber front panel 1, the second layer is the fiber front encapsulant film 2, the third layer is the cell layer 3, the fourth layer is the fiber back encapsulant film 4, and the fifth layer is the fiber back panel 5. The lightweight photovoltaic module has fewer layers, and the manufacturing process is simpler compared to photovoltaic modules with more layers.

[0026] Preferably, the fiber front plate 1 and / or fiber back plate 5 include a fluorinated weather-resistant layer and a fiber support layer, and the upper and lower surfaces of the fiber support layer are bonded to the fluorinated weather-resistant layer.

[0027] Specifically, the lightweight photovoltaic module includes three structures: the fiber front panel 1 includes a fluorinated weather-resistant layer and a fiber support layer; or both the fiber front panel 1 and the fiber back panel 5 include a fluorinated weather-resistant layer and a fiber support layer; or the fiber back panel 5 includes a fluorinated weather-resistant layer and a fiber support layer. In accordance with the direction of sunlight, the fiber front panel 1 and / or the fiber back panel 5 comprise a total of five layers: the first layer is a fluorinated weather-resistant layer, the second layer is an adhesive, the third layer is a fiber support layer, the fourth layer is an adhesive, and the fifth layer is a fluorinated weather-resistant layer. The upper and lower surfaces of the fiber support layer are bonded to the fluorinated weather-resistant layer using adhesive.

[0028] Preferably, the fiber support layer includes a fiber material that can enhance the strength of the lightweight photovoltaic module, so that the lightweight photovoltaic module has the structural strength to meet the usage requirements while maintaining a light weight.

[0029] In summary, the lightweight photovoltaic module of this invention comprises five layers: a fiber front panel 1, a fiber front encapsulant film 2, a cell layer 3, a fiber back encapsulant film 4, and a fiber back panel 5. The number of layers in the lightweight photovoltaic module is the same as that of a conventional single-glass module, making the process clear and the manufacturing process simple, with a shorter production time per module. The fiber support layer of the fiber front panel 1 and / or the fiber back panel 5 includes fiber material, which improves the strength and stiffness of the fiber front panel 1 and / or the fiber back panel 5. Therefore, the lightweight photovoltaic module possesses both light weight and high structural strength and stiffness. Furthermore, due to its high strength and stiffness, the cell layer 3 is less prone to microcracks under hail impacts, thus ensuring the power generation of the lightweight photovoltaic module.

[0030] In existing technologies, according to the direction of sunlight, the structure of a conventional single-glass module generally includes: a first layer of photovoltaic tempered glass, a second layer of encapsulating film, a third layer of battery layer, a fourth layer of encapsulating film, and a fifth layer of backsheet. The weight of a conventional single-glass module is, for example, 10.6 kg / m², while the weight of a lightweight photovoltaic module is, for example, 4.3 kg / m². The lightweight photovoltaic module reduces the weight per square meter by 60% compared to the conventional single-glass module. Therefore, the lightweight photovoltaic module of this invention is suitable for installation on mounting surfaces with weak load-bearing capacity, such as roofs constructed from materials like corrugated steel sheets and waterproof membranes, which have low load-bearing capacity.

[0031] Preferably, the thickness of the fiber support layer is in the range of 100 μm to 800 μm. When the thickness of the fiber support layer is within the above range, the fiber support layer has sufficient strength and stiffness to ensure that the fiber front plate 1 and / or fiber rear plate 5 meet the usage requirements.

[0032] Understandably, when using lightweight photovoltaic modules, the thickness of the fiber support layer can be, for example, 100μm, 200μm, 300μm, 400μm, 450μm, 580μm, 700μm, or 800μm, depending on the specific application requirements.

[0033] Preferably, the basis weight of the fiber support layer is in the range of 100 g / m² to 900 g / m². When the basis weight of the fiber support layer is within the above range, the fiber support layer has sufficient strength and stiffness to ensure that the fiber front panel 1 and / or fiber back panel 5 meet the usage requirements.

[0034] Understandably, when using lightweight photovoltaic modules, the weight of the fiber support layer can be, for example, 100g / m², 200g / m², 300g / m², 400g / m², 500g / m², 550g / m², 600g / m², 700g / m², 800g / m², or 900g / m², depending on the specific application requirements.

[0035] Preferably, the thickness of the fluorinated weather-resistant layer ranges from 5 μm to 100 μm. When the thickness of the fluorinated weather-resistant layer is within the above range, the fluorinated weather-resistant layer meets the weather resistance requirements, thereby ensuring that the weather resistance of the fiber front panel 1 and / or fiber back panel 5 meets the usage requirements.

[0036] Understandably, when using lightweight photovoltaic modules, the thickness of the fluorinated weather-resistant layer can be, for example, 5μm, 10μm, 20μm, 30μm, 40μm, 45μm, 50μm, 60μm, 70μm, 80μm, 90μm, or 100μm, depending on the specific application requirements.

[0037] Furthermore, the fiber front plate 1 is located on the upper surface of the battery layer 3 and needs to have good light transmittance. Therefore, when the fiber front plate 1 includes a fluorinated weather-resistant layer and a fiber support layer, the fluorinated weather-resistant layer can be at least one of the following substances: transparent ECTFE (transparent ECTFE resin is a 1:1 alternating copolymer of ethylene and trifluorochloroethylene), transparent PVDF (transparent polyvinylidene fluoride), transparent PVF (a polymer compound formed by the reaction of transparent polyvinyl alcohol and formaldehyde), transparent ETFE (transparent ethylene-tetrafluoroethylene copolymer), transparent ECTFE (transparent ethylene and trifluorochloroethylene 1:1 alternating copolymer), transparent fluorinated coating, etc.

[0038] Preferably, when the fiber front panel 1 includes a fluorinated weather-resistant layer and a fiber support layer, since the fiber front panel 1 is located on the upper surface of the battery layer 3 and requires good light transmittance, both the fluorinated weather-resistant layer and the fiber support layer are transparent materials. That is, the fluorinated weather-resistant layer is a transparent fluorinated weather-resistant layer, and the fiber support layer is a transparent fiber support layer. The fiber support layer includes the following components in the following mass percentages: polyethylene terephthalate 40-80%, fiber material 10-55%, and additives 2-10%.

[0039] In specific embodiments of the present invention, the fiber support layer comprises, for example, the following components in weight percentages: 40% polyethylene terephthalate, 55% fiber material, and 5% additives. Alternatively, it comprises, for example, the following components in weight percentages: 80% polyethylene terephthalate, 10% fiber material, and 10% additives. Or, for example, it comprises, for example, the following components in weight percentages: 60% polyethylene terephthalate, 35% fiber material, and 5% additives.

[0040] In this embodiment of the invention, the structure of the fiber front panel 1, arranged according to the direction of sunlight, consists of four layers: a first layer is a transparent fluorinated weather-resistant layer, which is the outermost layer of the lightweight photovoltaic module. This layer offers advantages such as UV aging resistance, water vapor resistance, abrasion resistance, chemical corrosion resistance, high temperature resistance, easy cleaning, and high light transmittance. It protects the lightweight photovoltaic module and ensures good power generation efficiency due to its high light transmittance. The second layer is a transparent polyurethane adhesive, which bonds the first transparent fluorinated weather-resistant layer to the third transparent fiber support layer. The third layer is a transparent fiber support layer, comprising polyethylene terephthalate and fiber materials. It offers advantages such as high light transmittance, high weather resistance, and high mechanical strength, improving the structural strength and rigidity of the fiber front panel 1 and supporting and protecting the battery layer 3 on its front side. The fourth layer is also a transparent polyurethane adhesive, which bonds the third transparent fiber support layer to the fifth transparent fluorinated weather-resistant layer. The transparent polyurethane adhesive serves as an adhesive.

[0041] Furthermore, the additives include at least one of the following: compatibilizer, anti-hydrolysis agent, light stabilizer, antioxidant, and flame retardant. It is understood that the additives can be selected according to the application requirements, and this embodiment of the invention does not specifically limit their selection.

[0042] Preferably, the lightweight photovoltaic module further includes a transparent fiber pre-coating film 2, which comprises the following components in weight percentages: 55-95% film and 5-45% fiber material.

[0043] In a specific embodiment of the present invention, the fiber pre-film 2 comprises, for example, the following components by mass percentage: film 55%, fiber material 45%. Or, for example, it comprises the following components by mass percentage: film 95%, fiber material 5%. Or, for example, it comprises the following components by mass percentage: film 75%, fiber material 25%.

[0044] In this embodiment of the invention, the transparent fiber front adhesive film 2 comprises an adhesive film and fiber material, giving it advantages such as high light transmittance, high weather resistance, high adhesion strength, and high overall strength. The fiber front adhesive film 2 ensures good adhesion between the fiber front panel 1 and the upper surface of the battery layer 3. Furthermore, when the front of the lightweight photovoltaic module is impacted by hail or other substances, the high-strength fiber front panel 1 and fiber front adhesive film 2 can protect the battery layer 3 from damage.

[0045] Preferably, the basis weight range of the fiber pre-coating film 2 is 300 g / m² to 700 g / m².

[0046] It is understandable that when using lightweight photovoltaic modules, the basis weight of the fiber pre-coating film 2 can be, for example, 300g / m², 400g / m², 500g / m², 550g / m², 600g / m², or 700g / m², etc., depending on the specific usage requirements.

[0047] Furthermore, the adhesive film in the transparent fiber pre-film 2 can be at least one of the above substances such as EVA (ethylene and acetic acid copolymer), PVB (polyvinyl butyral), and POE (polyolefin thermoplastic elastomer).

[0048] Preferably, the fiber backing plate 5 includes a fluorinated weather-resistant layer and a white fiber support layer. The white fiber support layer includes the following components in the indicated mass percentages: 50-75% polyethylene terephthalate, 10-30% fiber material, 5-10% titanium dioxide, and 5-10% additives.

[0049] In specific embodiments of the present invention, the white fiber support layer comprises, for example, the following components in weight percentages: 50% polyethylene terephthalate, 30% fiber material, 10% titanium dioxide, and 10% additives. Alternatively, it comprises, for example, the following components in weight percentages: 75% polyethylene terephthalate, 10% fiber material, 5% titanium dioxide, and 10% additives. Alternatively, it comprises, for example, the following components in weight percentages: 75% polyethylene terephthalate, 10% fiber material, 10% titanium dioxide, and 5% additives. Alternatively, it comprises, for example, the following components in weight percentages: 63% polyethylene terephthalate, 20% fiber material, 8% titanium dioxide, and 9% additives.

[0050] In this embodiment of the invention, the structure of the fiber backing plate 5, oriented according to the direction of sunlight, consists of a first layer of white fluorinated weather-resistant layer, which forms the outermost layer of the lightweight photovoltaic module and protects it. The second layer is polyurethane adhesive, which bonds the first white fluorinated weather-resistant layer to the third white fiber support layer. The third white fiber support layer enhances the structural strength and rigidity of the fiber backing plate 5. The fourth layer is also polyurethane adhesive, which bonds the third white fiber support layer to the fifth white fluorinated weather-resistant layer. The polyurethane adhesive serves as a bonding agent.

[0051] In this embodiment of the invention, when the structure of the fiber backing plate 5 includes a white fluorinated weather-resistant layer and a white fiber support layer, the fiber backing plate 5 is white. The white fiber backing plate 5 has advantages such as high reflectivity, high weather resistance, and high mechanical strength, and also has excellent moisture-blocking capabilities. While protecting the lightweight photovoltaic module, it can enhance the strength of the lightweight photovoltaic module, and its high reflectivity can also bring a certain power generation gain to the lightweight photovoltaic module.

[0052] Furthermore, the additives in the white fiber support layer include at least one of the above-mentioned substances such as compatibilizers, anti-hydrolysis agents, light stabilizers, antioxidants, and flame retardants.

[0053] Furthermore, the fiber backing 5 includes a white fluorinated weather-resistant layer, which may be at least one of the following substances: white ECTFE (white ECTFE resin is a 1:1 alternating copolymer of ethylene and trifluorochloroethylene), white PVDF (white polyvinylidene fluoride), white PVF (a polymer compound formed by the reaction of white polyvinyl alcohol and formaldehyde), white ETFE (white ethylene-tetrafluoroethylene copolymer), white ECTFE (white 1:1 alternating copolymer of ethylene and trifluorochloroethylene), or a white fluorinated coating.

[0054] Preferably, the lightweight photovoltaic module further includes a white fiber backing film 4, which comprises the following components by weight percentage: 55-75% film, 20-45% fiber material, and 0-5% titanium dioxide.

[0055] In a specific embodiment of the present invention, the fiber-backed adhesive film 4 comprises, for example, the following components by mass percentage: adhesive film 55%, fiber material 45%, titanium dioxide 5%. Alternatively, it comprises, for example, the following components by mass percentage: adhesive film 75%, fiber material 20%, titanium dioxide 5%. Alternatively, it comprises, for example, the following components by mass percentage: adhesive film 75%, fiber material 25%, titanium dioxide 0%. Alternatively, it comprises, for example, the following components by mass percentage: adhesive film 55%, fiber material 45%, titanium dioxide 0%. Alternatively, it comprises, for example, the following components by mass percentage: adhesive film 65%, fiber material 33%, titanium dioxide 2%. And when the titanium dioxide content is 0%, the fiber-backed adhesive film 4 is a transparent fiber-backed adhesive film 4.

[0056] When the fiber backing film 4 includes fiber material and film, it has the advantages of high reflectivity, high weather resistance, high bonding strength, and high strength. The fiber backing film 4 enables the lower surface of the battery layer 3 to be well bonded to the fiber backing plate 5.

[0057] Furthermore, the basis weight range of the fiber-coated film 4 is 300 g / m² to 700 g / m².

[0058] Understandably, when using lightweight photovoltaic modules, the basis weight of the fiber backing film 4 can be, for example, 300g / m², 400g / m², 500g / m², 550g / m², 600g / m², or 700g / m², depending on the specific application requirements.

[0059] Furthermore, the adhesive film in the fiber backing film 4 can be at least one of the above substances such as EVA (ethylene and acetic acid copolymer), PVB (polyvinyl butyral), and POE (polyolefin thermoplastic elastomer).

[0060] In an alternative embodiment of the present invention, both the white fiber backing film 4 and the white fiber backing plate 5 can be black components. In this case, the titanium dioxide can be replaced with other materials that can make the white fiber backing film 4 and the white fiber backing plate 5 black. The present invention does not limit this.

[0061] In another alternative embodiment of the present invention, the white fiber backing film 4 and the white fiber backing plate 5 may be transparent fiber backing film 4 and transparent fiber backing plate 5. When the fiber backing film 4 is transparent, the fiber backing film 4 may have the same structure and composition as the fiber fronting film 2. When the fiber backing plate 5 is transparent, the fiber backing plate 5 may have the same structure and composition as the fiber fronting plate 1.

[0062] Preferably, the fiber material includes glass fiber, carbon fiber, ultra-high molecular weight polyethylene fiber, polyaramid (aramid) fiber, poly(p-phenylenebenzodioxazole) fiber, or boron fiber.

[0063] Specifically, glass fiber is a fine filamentous material drawn from molten glass at extremely high speeds, and then twisted and plied to form glass fiber yarn. It can then be woven into fiber products such as glass fiber tape and glass cloth.

[0064] Carbon fiber is a new type of material with superior electrical, thermal, and mechanical properties. It is stronger than steel, less dense than aluminum, more corrosion-resistant than stainless steel, more heat-resistant than heat-resistant steel, and can conduct electricity like copper. Compared to glass fiber (GF), its Young's modulus is more than three times higher, and it is insoluble and does not swell in organic solvents, acids, and alkalis, exhibiting outstanding corrosion resistance.

[0065] Ultra-high molecular weight polyethylene fiber: First, ethylene is polymerized into a molecular weight of over 1 million using a common Ziegler-Natta catalyst system, approximately 30 to 60 times that of ordinary polyethylene fiber. This fiber currently boasts the highest specific strength among organic fibers. Among high-strength fibers, it exhibits the highest dynamic fatigue resistance and abrasion resistance, along with excellent impact resistance and chemical resistance.

[0066] Polyaramid (aramid) fiber: The most outstanding properties of aramid fiber composites are its high stress-fracture life, good cyclic fatigue resistance and significant vibration damping characteristics.

[0067] Poly(p-phenylenebenzodioxazole) fiber is considered the super fiber of the 21st century due to its lower density, higher specific strength and specific modulus than carbon fiber.

[0068] Boron fiber is a continuous monofilament made by depositing boron (B) onto tungsten (W) wire or other fiber core material using chemical vapor deposition.

[0069] In summary, the lightweight photovoltaic module of this invention adds fiber material to the fiber front plate 1, fiber front film 2, fiber back film 4 and fiber back plate 5, ensuring that the module is lightweight while having the advantages of high strength and high rigidity, and without increasing the number of modules.

[0070] In a specific embodiment of the lightweight photovoltaic module of the present invention, the total thickness of the transparent fiber front panel 1 ranges from 200μm to 1000μm. The structure of the fiber front panel 1, according to the direction of sunlight, consists of the following layers: a first layer is a transparent fluorinated weather-resistant layer with a thickness ranging from 5μm to 100μm; a second layer is a transparent polyurethane adhesive with a thickness ranging from 3μm to 15μm; a third layer is a transparent fiber support layer with a thickness ranging from 100μm to 800μm; a fourth layer is a transparent polyurethane adhesive with a thickness ranging from 3μm to 15μm; and a fifth layer is a transparent fluorinated weather-resistant layer with a thickness ranging from 5μm to 100μm.

[0071] In practical applications, for example, the total thickness of the transparent fiber front panel 1 is 200μm, the thickness of the transparent fluorinated weather-resistant layer is 40μm, the thickness of the transparent polyurethane adhesive is 10μm, the thickness of the transparent fiber support layer is 100μm, the thickness of the transparent polyurethane adhesive is 10μm, and the thickness of the transparent fluorinated weather-resistant layer is 40μm.

[0072] For example, the total thickness of the transparent fiber front panel 1 is 1000 μm, the thickness of the transparent fluorinated weather-resistant layer is 70 μm, the thickness of the transparent polyurethane adhesive is 15 μm, the thickness of the transparent fiber support layer is 800 μm, the thickness of the transparent polyurethane adhesive is 15 μm, and the thickness of the transparent fluorinated weather-resistant layer is 100 μm.

[0073] For example, the total thickness of the transparent fiber front panel 1 is 600 μm, the thickness of the transparent fluorinated weather-resistant layer is 50 μm, the thickness of the transparent polyurethane adhesive is 15 μm, the thickness of the transparent fiber support layer is 450 μm, the thickness of the transparent polyurethane adhesive is 15 μm, and the thickness of the transparent fluorinated weather-resistant layer is 70 μm.

[0074] In another specific embodiment of the lightweight photovoltaic module of the present invention, the total thickness of the white fiber backing plate 5 ranges from 200μm to 1000μm. The structure of the fiber backing plate 5, according to the direction of sunlight, consists of the following layers: the first layer is a white fluorine-containing weather-resistant layer with a thickness ranging from 5μm to 100μm; the second layer is polyurethane adhesive with a thickness ranging from 3μm to 15μm; the third layer is a white fiber support layer with a thickness ranging from 100μm to 800μm; the fourth layer is polyurethane adhesive with a thickness ranging from 3μm to 15μm; and the fifth layer is a white fluorine-containing weather-resistant layer with a thickness ranging from 5μm to 100μm.

[0075] In practical applications, for example, the total thickness of the white fiber back panel 5 is 200μm, of which the thickness of the white fluorine-containing weather-resistant layer is 40μm, the thickness of the polyurethane adhesive is 10μm, the thickness of the white fiber support layer is 100μm, the thickness of the polyurethane adhesive is 10μm, and the thickness of the white fluorine-containing weather-resistant layer is 40μm.

[0076] For example, the total thickness of the white fiber back panel 5 is 1000μm, of which the thickness of the white fluorine-containing weather-resistant layer is 70μm, the thickness of the polyurethane adhesive is 15μm, the thickness of the white fiber support layer is 800μm, the thickness of the polyurethane adhesive is 15μm, and the thickness of the white fluorine-containing weather-resistant layer is 100μm.

[0077] For example, the total thickness of the white fiber back panel 5 is 600 μm, of which the thickness of the white fluorine-containing weather-resistant layer is 50 μm, the thickness of the polyurethane adhesive is 15 μm, the thickness of the white fiber support layer is 450 μm, the thickness of the polyurethane adhesive is 15 μm, and the thickness of the white fluorine-containing weather-resistant layer is 70 μm.

[0078] In practical applications, the thickness of the fiber front plate 1 and the fiber back plate 5 in lightweight photovoltaic modules need to be adjusted according to the usage requirements. For example, in very special cases, the thickness of the fiber back plate 5 can be 2000 μm, and the thickness of the white fiber support layer can be 1800 μm to meet the usage requirements.

[0079] In a specific embodiment of the lightweight photovoltaic module of the present invention, by adding fiber material to the fiber front plate 1, the fiber front film 2, the battery layer 3, the fiber back film 4 and the fiber back plate 5, the lightweight photovoltaic module has high strength and rigidity structural performance while being lightweight.

[0080] In one embodiment of the present invention, the manufacturing process of the lightweight photovoltaic module is as follows:

[0081] Material preparation: the dimensions of the fiber front plate 1 are 1800mm*1030mm, the dimensions of the fiber front adhesive film 2 are 1760mm*990mm, the dimensions of the battery string including 66 shingled battery cells are 1760mm*990mm, and the dimensions of the fiber back plate 5 are 1760mm*990mm.

[0082] The fiber front plate 1, fiber front encapsulating film 2, battery strings, fiber rear encapsulating film 4, and fiber rear plate 5 are laid on the glass. The battery string busbars extend from the back of the module and are then laminated in a laminator at a temperature of 120–145℃ for 22 minutes. After lamination, the module is trimmed, resulting in a final module size of 17770mm * 1000mm. After cutting, a junction box is installed on the back of the module, and the module power is tested, showing a power of 332.75W.

[0083] Aging tests were performed on the above components:

[0084] After 1000 hours of damp heat aging (85℃, 85%RH), the power of the module decreased by 0.63%. The required power decrease is ≤5%, which is acceptable.

[0085] After high and low temperature cycling of TC200 (temperature -40℃ to 85℃, 200 cycles), the component power decayed by 1.04%, which is acceptable given the requirement of power decay ≤5%.

[0086] After mechanical load (5400Pa 1h on the front and 2400Pa 1h on the back constitute one cycle, for a total of 3 cycles), the power of the module decreases by 0.82%. The power decrease requirement is ≤5%, which is acceptable.

[0087] This invention also discloses a photovoltaic system, which includes the aforementioned lightweight photovoltaic module. The photovoltaic system has the advantages of high strength and rigidity of the aforementioned lightweight photovoltaic module, thereby ensuring a stable power generation of the photovoltaic system.

[0088] It should be noted that, for the sake of simplicity, the method embodiments are all described as a series of actions. However, those skilled in the art should understand that the embodiments of this application are not limited to the described order of actions, because according to the embodiments of this application, some steps can be performed in other orders or simultaneously. Secondly, those skilled in the art should also understand that the embodiments described in the specification are all preferred embodiments, and the actions involved are not necessarily essential to the embodiments of this application.

[0089] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0090] The embodiments of the present invention have been described above with reference to the accompanying drawings. However, the present invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of the present invention without departing from the spirit and scope of the claims. All of these forms are within the protection scope of the present invention.

Claims

1. A lightweight photovoltaic module, characterized by, The lightweight photovoltaic module includes: a fiber front plate (1), a transparent fiber front film (2), a battery layer (3), a transparent fiber back film (4), and a fiber back plate (5). The upper surfaces of the fiber front plate (1) and the battery layer (3) are bonded together by the transparent fiber front film (2), and the lower surface of the battery layer (3) and the fiber back plate (5) are bonded together by the transparent fiber back film (4). The fiber front plate (1) and / or the fiber back plate (5) include a transparent fluorinated weather-resistant layer and a transparent fiber support layer, and the upper and lower surfaces of the transparent fiber support layer are bonded to the transparent fluorinated weather-resistant layer. The transparent fiber support layer comprises fiber material.

2. The lightweight photovoltaic module according to claim 1, characterized in that, The thickness of the transparent fiber support layer ranges from 100μm to 800μm.

3. The lightweight photovoltaic module according to claim 1, characterized in that, The weight range of the transparent fiber support layer is 100g / ㎡ to 900g / ㎡.

4. The lightweight photovoltaic module according to claim 1, characterized in that, The thickness of the transparent fluorine-containing weather-resistant layer ranges from 5 μm to 100 μm.

5. The lightweight photovoltaic module according to any one of claims 1-4, characterized in that, The fiber front plate (1) includes the transparent fluorinated weather-resistant layer and the transparent fiber support layer. The transparent fiber support layer includes the following components by mass percentage: polyethylene terephthalate 40-80%, fiber material 10-55%, and additives 2-10%.

6. The lightweight photovoltaic module according to claim 1, characterized in that, The transparent fiber pre-coating film (2) comprises the following components by mass percentage: 55-95% film and 5-45% fiber material.

7. The lightweight photovoltaic module according to any one of claims 1-4, characterized in that, The fiber back plate (5) includes the transparent fluorine-containing weather-resistant layer and the transparent fiber support layer. The transparent fiber support layer includes the following components by mass percentage: 50-75% polyethylene terephthalate, 10-30% fiber material, 5-10% titanium dioxide, and 5-10% additives.

8. The lightweight photovoltaic module according to claim 1, characterized in that, The transparent fiber back film (4) comprises the following components by mass percentage: film 55-75%, fiber material 20-45%, and titanium dioxide 0-5%.

9. The lightweight photovoltaic module according to claim 1, characterized in that, The fiber material includes glass fiber, carbon fiber, ultra-high molecular weight polyethylene fiber, polyaramid fiber, poly(p-phenylenebenzodioxazole) fiber, or boron fiber.

10. A photovoltaic system, characterized in that, Includes the lightweight photovoltaic module as described in any one of claims 1 to 9.

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