Lightweight photovoltaic module

Abstract

A light-weight photovoltaic module relates to the field of photovoltaic technology and comprises a transparent front plate, a first packaging adhesive film, a battery string layer, a second packaging adhesive film and a honeycomb core composite back plate which are stacked in sequence, and the honeycomb core composite back plate comprises a honeycomb core layer and skin materials laid on the upper surface and the lower surface of the honeycomb core layer respectively. The skin material and the honeycomb core layer are bonded and fixed through hot pressing, and the honeycomb core layer and the skin material are both made of flame-retardant PP materials. By adopting the technical scheme, the light-weight photovoltaic module provided by the utility model has the advantages of light weight, excellent fireproof performance, good weather resistance and impact resistance and the like, and is beneficial to market popularization.

Description

Technical Field

[0001] The utility model relates to the technical field of photovoltaic, and particularly relates to a lightweight photovoltaic module. Background Art

[0002] A photovoltaic module (also called a solar panel) is the core part of a solar power generation system and also the most important part. Its function is to convert solar energy into electrical energy, and send it to a storage battery for storage, or drive a load to work.

[0003] However, traditional photovoltaic modules generally have problems such as large weight, high installation cost, and limited roof load-bearing capacity, and are severely restricted when used in light roofs or occasions with weak load-bearing capacity. Therefore, the research and development of lightweight photovoltaic modules is of great significance for promoting the wide application of solar photovoltaic technology.

[0004] Although there are some lightweight photovoltaic modules on the market currently, there are still some obvious deficiencies. For example, for a lightweight module using a honeycomb composite board (such as CN109390422A) as the backplane of the photovoltaic module, although the weight is reduced to a certain extent, the module with a metal material as the honeycomb core has little difference in weight from the traditional module, and the module with a resin material as the honeycomb core is difficult to meet the requirements of Class C fire protection performance. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a lightweight photovoltaic module aiming at the defects and deficiencies in the prior art.

[0006] The technical solution adopted by the utility model is: a lightweight photovoltaic module, comprising a transparent front plate, a first encapsulation film, a battery string layer, a second encapsulation film, and a honeycomb core composite backplane which are sequentially laminated. The honeycomb core composite backplane includes a honeycomb core layer and skin materials respectively laid on the upper and lower surfaces of the honeycomb core layer. The skin materials and the honeycomb core layer are fixed by hot pressing and bonding, and both the honeycomb core layer and the skin materials are made of flame-retardant PP material.

[0007] Optionally, a layer of fluorocarbon flame-retardant resin is coated on the surface of the skin material.

[0008] Optionally, the transparent front plate, the first encapsulation film, the battery string layer, the second encapsulation film, and the honeycomb core composite backplane are laminated into one body by a lamination process.

[0009] Optionally, the transparent front plate is a lightweight weather-resistant polymer material, and the main body of the transparent front plate is a fluoropolymer and / or a highly weather-resistant non-fluoropolymer.

[0010] Optionally, the transparent front plate is one of ETFE, TPT, TPC, HPC, CPC, and TCPC.

[0011] Optionally, the surface of the transparent front plate is coated with one or more of an anti-reflection layer, an anti-scratch coating, and an anti-ultraviolet coating and / or is compounded with one or more of ETFE, PVDF, and PVF by a composite process.

[0012] Optionally, the light transmittance of the transparent front plate is 88-95%.

[0013] Optionally, both the first encapsulation film and the second encapsulation film are prepared by blending or copolymerizing and modifying at least two of EVA, POE, EPE, and their modified products.

[0014] Optionally, the thicknesses of both the first encapsulation film and the second encapsulation film are 200-500 μm.

[0015] The lightweight solar module of the present invention has the following advantages:

[0016] 1. Lightweight: By using lightweight materials and optimizing the structural design, the weight of the module is reduced by more than 40%, effectively reducing the installation cost and the requirement for the roof load-bearing capacity.

[0017] 2. Excellent fire resistance: The honeycomb core composite backplane treated with flame-retardant PP resin and fluorocarbon flame-retardant resin enables the module to meet the Class C fire protection requirements, improving safety.

[0018] 3. High support strength and wind and snow load resistance: The optimized module structure can withstand high wind and snow loads, enhancing the reliability and service life of the module.

[0019] 4. Good weather resistance and impact resistance: The use of lightweight weather-resistant polymer materials and good encapsulation technology improve the weather resistance and hail impact resistance of the module. Description of the Drawings

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0021] Figure 1 is the overall structural schematic diagram of this embodiment;

[0022] Figure 2 is the display diagram of the honeycomb core composite backplane in this embodiment.

[0023] Description of reference numerals: 10, transparent front plate; 20, first encapsulation film; 30, battery string layer; 40, second encapsulation film; 50, honeycomb core composite back plate; 51, honeycomb core layer; 52, skin material. Detailed implementation manners

[0024] Next, the technical solutions in the embodiments of the present utility model will be described clearly and completely in conjunction with the accompanying drawings Figure 1-2 . Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0025] It should be noted that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", "back", "side", "circumferential", etc. of the present utility model indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present utility model. In addition, the words such as first and second are only used to distinguish multiple components or structures with the same or similar structures, and do not represent a special limitation on the setting order or connection relationship.

[0026] This embodiment relates to a lightweight photovoltaic module. Referring to Figure 1 and Figure 2 , it includes a transparent front plate 10, a first encapsulation film 20, a battery string layer 30, a second encapsulation film 40, and a honeycomb core composite back plate 50 which are sequentially stacked. Among them, the honeycomb core composite back plate 50 includes a honeycomb core layer 51 and skin materials 52 respectively laid on the upper and lower surfaces of the honeycomb core layer 51. The skin materials 52 and the honeycomb core layer 51 are fixed by hot pressing and bonding. The honeycomb core layer 51 and the skin materials 52 are both made of flame-retardant PP material, and the transparent front plate 10, the first encapsulation film 20, the battery string layer 30, the second encapsulation film 40, and the honeycomb core composite back plate 50 are laminated into one body by a lamination process.

[0027] It can be understood that by using flame-retardant PP materials for both the honeycomb core layer 51 and the skin materials 52, while reducing the weight of the photovoltaic module, excellent fire prevention performance is maintained, the installation cost and the requirement for the roof load-bearing capacity are reduced, and the safety is improved.

[0028] In some embodiments, a layer of fluorocarbon flame retardant resin is coated on the surface of the skin material 52. During the actual production process, by using a roll coating process to coat a layer of fluorocarbon flame retardant resin on the surface of the skin material 52, it can achieve a flame retardant effect and increase the function of resisting environmental aging.

[0029] In some embodiments, the transparent front plate 10 is made of a lightweight weather-resistant polymer material, and the main body of the transparent front plate 10 is a fluoropolymer and / or a highly weather-resistant non-fluoropolymer. By using a lightweight weather-resistant polymer material to make the transparent front plate 10, the weather resistance of the entire photovoltaic module can be improved, thereby extending the service life of the photovoltaic module.

[0030] In some embodiments, the transparent front plate 10 is one of ETFE, TPT, TPC, HPC, CPC, and TCPC.

[0031] In some embodiments, the surface of the transparent front plate 10 is coated with one or more of an antireflection layer, an anti-scratch coating, and an anti-ultraviolet coating and / or is compounded with one or more of ETFE, PVDF, and PVF by a composite process.

[0032] The antireflection layer can reduce the reflection of light on the material surface, thereby improving the light transmittance of the transparent front plate 10; the anti-scratch coating can improve the surface hardness of the material, making the transparent front plate 10 more resistant to scratches and abrasions; the anti-ultraviolet coating can absorb or reflect ultraviolet light, protecting the material from ultraviolet damage, thereby extending the service life of the transparent front plate 10. That is, the settings of the antireflection layer, the anti-scratch coating, and the anti-ultraviolet coating can improve the photoelectric conversion efficiency of the photovoltaic module and protect the battery panel from environmental factors, and extend the service life of the photovoltaic module. Since ETFE, PVDF, and PVF all have excellent chemical resistance, heat resistance, and non-stickiness, compounding one or more of ETFE, PVDF, and PVF on the surface of the transparent front plate 10 can effectively protect the battery panel from the environment and extend the service life of the photovoltaic module.

[0033] In some embodiments, the light transmittance of the transparent front plate 10 is 88-95%. That is, the light transmittance of the transparent front plate 10 is 88-95%, and within this range, the power generation efficiency and photoelectric conversion efficiency of the photovoltaic module are relatively high.

[0034] In some embodiments, both the first encapsulation film 20 and the second encapsulation film 40 are prepared by blending or copolymerizing at least two of EVA, POE, EPE, and their modified products. That is, using the materials prepared by blending or copolymerizing at least two of EVA, POE, EPE, and their modified products as the first encapsulation film 20 and the second encapsulation film 40 has excellent encapsulation performance and fire resistance, thereby further improving the overall stability and power generation efficiency of the photovoltaic module.

[0035] In some embodiments, the thicknesses of the first encapsulation film 20 and the second encapsulation film 40 are both 200 - 500 μm. Compared with the 400 - 1000 μm of the encapsulation film in traditional photovoltaic modules, the encapsulation film in this embodiment is thinner, reducing the material usage amount, increasing the light transmittance, and further improving the power generation efficiency.

[0036] Although the present application has been disclosed above with preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications and decorations without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention shall be defined by the claims.

[0037] Specifically, a lightweight photovoltaic module provided by the present application can be further optimized and improved according to actual needs. For example, in the selection of the encapsulation film, in addition to ethylene-vinyl acetate copolymer (EVA) and polyolefin elastomer (POE), other materials with excellent encapsulation performance and fireproof performance can also be considered, such as modified products of polyolefin elastomer and ethylene-vinyl acetate copolymer (EPE). The selection and use of these materials can be flexibly adjusted according to specific performance requirements and cost considerations.

[0038] In addition, during the preparation process of the honeycomb core composite backsheet 50, in addition to using flame-retardant PP material and fluorocarbon flame-retardant resin for surface treatment, other flame-retardant treatment methods can also be considered, such as adding flame retardants and using flame-retardant coatings. The selection and application of these treatment methods can be flexibly adjusted according to actual needs and process conditions to achieve the best fireproof effect.

[0039] In terms of the lamination process, the performance of the module can also be optimized by adjusting parameters such as lamination temperature, pressure, and time. The adjustment of these parameters can be precisely controlled according to the properties of the materials, the structure of the module, and the required performance indicators to ensure the quality and stability of the module.

[0040] In summary, the present application provides a lightweight solar module, which realizes the dual improvement of lightweight and fireproof performance by adopting specific materials and structures. At the same time, the present application also has the advantages of simple structure, convenient installation, and strong weather resistance, and is suitable for roof installation with weak load-bearing capacity. In practical applications, it can be flexibly adjusted and optimized according to specific requirements and conditions to meet the usage requirements in different scenarios.

[0041] The above is only used to illustrate the technical solution of the present utility model and not to limit it. Other modifications or equivalent replacements made by those of ordinary skill in the art to the technical solution of the present utility model shall be covered within the scope of the claims of the present utility model as long as they do not depart from the spirit and scope of the technical solution of the present utility model.

Claims

1. A lightweight photovoltaic module, characterized in that, It includes a transparent front panel (10), a first encapsulation film (20), a battery string layer (30), a second encapsulation film (40), and a honeycomb core composite backplane (50) that are sequentially stacked. The honeycomb core composite backplane (50) includes a honeycomb core layer (51) and skin materials (52) respectively laid on the upper and lower surfaces of the honeycomb core layer (51). The skin materials (52) are fixedly bonded to the honeycomb core layer (51) by hot pressing. Both the honeycomb core layer (51) and the skin materials (52) are made of flame-retardant PP material.

2. The lightweight photovoltaic module according to claim 1, wherein, A layer of fluorocarbon flame-retardant resin is coated on the surface of the skin material (52).

3. A lightweight photovoltaic module according to claim 1, characterized in that, The transparent front panel (10), the first encapsulation film (20), the battery string layer (30), the second encapsulation film (40), and the honeycomb core composite backplane (50) are laminated into one body by a lamination process.

4. The lightweight photovoltaic module according to claim 1, wherein, The transparent front panel (10) is a lightweight weather-resistant polymer material.

5. A lightweight photovoltaic module according to claim 4, wherein The transparent front panel (10) is one of ETFE, TPT, TPC, HPC, CPC, and TCPC.

6. The lightweight photovoltaic module according to claim 1, wherein, One or more of an antireflection layer, an anti-scratch coating, and an anti-ultraviolet coating are coated on the surface of the transparent front panel (10) and / or one or more of ETFE, PVDF, and PVF are compounded by a composite process.

7. A lightweight photovoltaic module according to claim 1, wherein The light transmittance of the transparent front panel (10) is 88-95%.

8. A lightweight photovoltaic module according to claim 1, wherein, The thicknesses of both the first encapsulation film (20) and the second encapsulation film (40) are 200-500 μm.

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