Photovoltaic module

Abstract

The utility model relates to the field of photovoltaic technology, in particular to a photovoltaic assembly, which comprises a photovoltaic panel, and the photovoltaic panel comprises an AF coating arranged on the outermost layer of the photovoltaic panel; the first AR coating is arranged at the bottom of the AF coating; the high alumina-silica glass is arranged at the bottom of the AR coating I; the high-reflection mirror surface coating is arranged at the bottom of the high-alumina-silica glass of the high-alumina-silica glass; the second AR coating is arranged at the bottom of the high-alumina-silica glass of the high-alumina-silica glass; the EVA filler is arranged at the bottom of the AR coating II; the tinned copper strip is arranged at the bottom of the EVA filler; and the battery chip is arranged at the bottom of the EVA filler. The AF coating is made of polytetrafluoroethylene and has the functions of fingerprint resistance, dirt resistance, hydrophobicity, oleophobicity and the like, the surface hardness is improved, and scratches are effectively prevented. The coating keeps the surface of the photovoltaic module clean when used outdoors for a long time, and the maintenance cost is reduced.

Description

Technical Field

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

[0002] A photovoltaic (PV) module is a photoelectric semiconductor device that generates electricity using sunlight, converting solar energy into electrical energy through the photovoltaic effect. With the increasing global demand for renewable energy, PV modules have gradually become an important component of clean energy generation. These modules typically consist of a series of solar cells encapsulated in soda-lime glass or other transparent materials to protect the cells from environmental impacts. PV modules are characterized by high efficiency and environmental friendliness, and can achieve stable power generation output in areas with abundant sunshine. Strengthened photovoltaic glass possesses a certain degree of impact and pressure resistance, enabling it to withstand harsh weather conditions such as wind and rain. However, the power generation efficiency and lifespan of PV modules remain areas of continuous improvement within the industry.

[0003] Chinese patent CN220627816U discloses a photovoltaic panel in which a phase change hydrogel layer is disposed on the side of the backsheet layer away from the solar cell layer. The phase change hydrogel layer is made of a composite of hydrogel and phase change material and has a phase change temperature. The phase change hydrogel layer is configured to absorb heat from the photovoltaic panel through water evaporation when the panel temperature reaches the phase change temperature, and to regenerate and release heat by absorbing water when the panel temperature does not reach the phase change temperature. This photovoltaic panel can improve heat dissipation capacity.

[0004] However, the surface wettability of photovoltaic glass (i.e., the spreading characteristics of water droplets on glass) affects dust adhesion. Untreated photovoltaic glass often easily absorbs moisture, and when the air humidity is high or after rain, the moisture helps dust particles adhere to the glass surface. Combined with minerals in the soil, after the moisture evaporates, the dirt formed by these particles adheres firmly to the glass and is difficult to be washed away by simple wind or rain. This not only reduces light transmittance but also directly affects power generation efficiency. In addition, modules exposed to the outside environment for a long time are susceptible to natural aging and corrosion, especially in areas with high humidity, high salinity, or severe pollution. This corrosion is more pronounced, leading to module damage or functional degradation.

[0005] In view of this, we propose a photovoltaic module. Utility Model Content

[0006] One of the technical problems this application aims to solve is that photovoltaic modules are susceptible to pollution and aging when exposed to the natural environment for a long time, which leads to a decrease in power generation efficiency and an increase in maintenance costs.

[0007] To address the aforementioned technical problems, this application provides: a photovoltaic module, including a photovoltaic panel, wherein the photovoltaic panel includes:

[0008] AF coating, the AF coating is applied to the outermost layer of the photovoltaic panel;

[0009] AR coating one, AR coating one is set at the bottom of AF coating;

[0010] High-alumina-silicon glass is placed at the bottom of AR coating one;

[0011] A high-reflectivity mirror coating is applied to the bottom of the high-aluminosilicate glass.

[0012] AR coating two, AR coating two is applied to the bottom of the high aluminosilicate glass;

[0013] EVA filler, EVA filler is set at the bottom of AR coating two;

[0014] Tin-plated copper strip, which is placed at the bottom of the EVA filler;

[0015] Battery chip, the battery chip is set at the bottom of the EVA filling;

[0016] Back pad, the back pad is set at the bottom of the EVA filling;

[0017] Junction box, located at the bottom of the back pad.

[0018] In some embodiments, tin-plated copper strips are fixedly connected to the battery chip, and the tin-plated copper strips are interconnected.

[0019] In some embodiments, the AF coating is made of polytetrafluoroethylene, and the thickness of the AF coating is 2-10 nm.

[0020] In some embodiments, AR coating one is silicon dioxide and niobium pentoxide, and the thickness of AR coating one is 50-150 nm.

[0021] In some embodiments, the high-aluminosilicate glass contains a high proportion of alumina and is mixed with silicates.

[0022] In some embodiments, the high-reflectivity mirror coating uses silver or aluminum powder as the reflective material and is mixed with resin, and the thickness of the high-reflectivity mirror coating is 5-20 μm.

[0023] In some embodiments, the EVA filler is ethylene-vinyl acetate copolymer with an EVA filler thickness of 0.45-0.55 mm, and the backing is polyethylene terephthalate with a backing thickness of 0.3-0.5 mm.

[0024] The photovoltaic module provided in this application, through the above technical solution, has at least the following beneficial effects:

[0025] (1) This utility model incorporates an AF coating made of polytetrafluoroethylene, which possesses functions such as fingerprint resistance, dirt resistance, hydrophobicity, and oleophobicity, thereby enhancing surface hardness and effectively preventing scratches. This coating keeps the photovoltaic module surface clean during long-term outdoor use, reducing maintenance costs.

[0026] (2) By setting AR coating one and AR coating two, AR coating one and AR coating two reduce light reflection and increase light transmittance by about 8%-10%, allowing more sunlight to pass through the glass into the battery chip, improving light utilization efficiency, and thus improving the power generation efficiency of the component.

[0027] (3) This utility model uses high aluminosilicate glass, which has high light transmittance and mechanical strength. This not only ensures that more light penetrates into the battery chip, but also effectively protects the components from external impacts and harsh environments.

[0028] (4) This utility model has a high reflectivity mirror coating. The high reflectivity mirror coating reflects unused light and heat in the non-battery chip area, avoids heat accumulation, reduces local overheating and aging of the module, and thus extends the service life of the photovoltaic module.

[0029] (5) By setting EVA filling, the EVA filling and tin-plated copper strip are effectively packaged and tightly electrically connected, which ensures the stability of the battery chip, prevents air and moisture from entering, and ensures the long-term performance of the component.

[0030] (6) By setting a back pad, this utility model provides additional mechanical protection and electrical insulation, effectively preventing external environment from damaging the battery chip and internal circuit, and ensuring the safety and long-term stability of the component structure. Attached Figure Description

[0031] The accompanying drawings, which are included to provide a further understanding of the present invention, form part of this application:

[0032] Figure 1 This is a schematic diagram of the photovoltaic module structure disclosed in the embodiments of this application.

[0033] Explanation of reference numerals in the attached figures:

[0034] 1. AF coating; 2. AR coating one; 3. High aluminosilicate glass; 4. High reflective mirror coating; 5. AR coating two; 6. EVA filling; 7. Tinned copper strip; 8. Battery chip; 9. Back pad; 10. Junction box. Detailed Implementation

[0035] The embodiments of this application will be further described in detail below with reference to the accompanying drawings and examples. The detailed description of the following embodiments and the accompanying drawings are used to illustrate the principles of this application by way of example, but should not be used to limit the scope of this application. This application can be implemented in many different forms and is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

[0036] These embodiments are provided to make the application thorough and complete, and to fully express the scope of the application to those skilled in the art. It should be noted that, unless otherwise specifically stated, the relative arrangement of components and steps, material composition, numerical expressions and values ​​illustrated in these embodiments should be interpreted as merely exemplary and not as limiting.

[0037] It should be noted that, in the description of this application, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," and "outer," etc., indicating orientation or positional relationship, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0038] Furthermore, the terms "first," "second," and similar terms used in this application do not indicate any order, quantity, or importance, but are merely used to distinguish different parts. "Vertical" is not strictly vertical, but within the permissible margin of error. "Parallel" is not strictly parallel, but within the permissible margin of error. Terms such as "including" or "contains" mean that the element preceding the word encompasses the element listed after it, and do not exclude the possibility of encompassing other elements as well.

[0039] It should also be noted that, in the description of this application, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this application depending on the specific circumstances. When a specific device is described as being located between a first device and a second device, an intermediary device may or may not be present between the specific device and the first or second device.

[0040] All terms used in this application have the same meaning as understood by one of ordinary skill in the art to which this application pertains, unless otherwise specifically defined. It should also be understood that terms defined in general dictionaries should be interpreted as having meanings consistent with their meanings in the context of the relevant art, and not as idealized or highly formalized, unless expressly defined herein.

[0041] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, they should be considered part of the specification.

[0042] Please see Figure 1 As shown, the present invention provides a technical solution: a photovoltaic module, including a photovoltaic panel, the photovoltaic panel comprising:

[0043] AF coating 1 is applied to the outermost layer of the photovoltaic panel; as the outermost layer, it is directly exposed to the environment. It provides the entire photovoltaic module with anti-fingerprint, anti-fouling, hydrophobic, and oleophobic properties, while also enhancing surface hardness, preventing scratches, and protecting the underlying structure from damage.

[0044] AR coating 2 is applied to the bottom of AF coating 1. AR coating 2 primarily reduces light reflection and increases transmittance. It allows more sunlight to penetrate the glass and enter the photovoltaic cell chip, improving light utilization efficiency and power generation efficiency.

[0045] High-alumina-silicon glass 3 is placed at the bottom of AR coating 2. High-alumina-silicon glass 3 serves as a protective barrier for the photovoltaic module, while its high light transmittance ensures that light can smoothly penetrate to the underlying battery chips. It also provides high mechanical strength, protecting the internal components of the module from external impacts, wind, rain, and other environmental influences.

[0046] High-reflectivity mirror coating 4 is applied to the bottom of the high-aluminosilicate glass 3. This coating is printed only on the non-cell chip area. Its function is to reflect light and heat that are not used by the cell chip, reduce the accumulation of heat in these areas, thereby preventing local overheating and aging of the module and improving the service life of the module.

[0047] AR Coating 25 is applied to the bottom of the high-aluminosilicate glass 3. AR Coating 25 further reduces light loss due to reflection on the back of the glass, ensuring that more light passes through to the battery chip, thereby improving the overall light utilization efficiency of the module.

[0048] EVA filler 6 is located at the bottom of AR coating 5. As an encapsulation material, EVA filler 6 tightly wraps around the battery chip, providing fixation, cushioning, and protection. It also prevents air and moisture from entering the module, maintaining its long-term stability.

[0049] Tinned copper strip 7 is located at the bottom of EVA filler 6; tinned copper strip 7 is used for electrical connection, connecting the current generated by each battery cell in series and efficiently transmitting electrical energy to the junction box. It is typically fixed between battery cells 8 by soldering.

[0050] The battery chip 8 is located at the bottom of the EVA filler 6. The battery chip 8 is the core functional layer of the photovoltaic module, responsible for absorbing the transmitted sunlight and converting light energy into electrical energy. It is encapsulated by two layers of EVA filler 6 and connected in series by tin-plated copper strips 7.

[0051] Back pad 9 is located at the bottom of EVA filler 6; back pad 9 provides additional mechanical protection and electrical insulation for the module, preventing external environmental damage to the battery cells 8 and internal circuitry. It is one of the module's underlying structures and helps extend the module's lifespan.

[0052] Junction box 10 is located at the bottom of back pad 9. Junction box 10 collects the current from each battery chip 8 and outputs electrical energy to an external system through external wires. It is usually fixed to the back or side of the assembly and is the endpoint of current collection and transmission.

[0053] In some embodiments, tin-plated copper strips 7 are fixedly connected to the battery chips 8, and the tin-plated copper strips 7 are interconnected. The current generated by each battery chip is connected in series. The AF coating 1 is made of polytetrafluoroethylene, and the thickness of the AF coating 1 is 2-10 nm. The AF coating is usually uniformly coated on the glass surface by chemical vapor deposition (CVD) or spraying process. It can also be done by wet processing and spin coating. It prevents the adhesion of fingerprints, dust, and oil stains, increases surface hardness, protects the cleanliness of photovoltaic glass in the outdoor environment for a long time, and reduces maintenance costs. The AR coating 2 is made of silicon dioxide and niobium pentoxide, and the thickness of the AR coating 2 is 50-150 nm. The specific thickness is determined by the refractive index and light wavelength to achieve the best anti-reflection effect. By reducing reflected light, the light transmittance is increased, allowing more sunlight to enter the battery chips 8, thereby improving the power generation efficiency of the module and increasing the transmittance by about 8%-10%. The high-alumina-silicon glass 3 contains a high proportion of alumina and is mixed with silicates. Offering high light transmittance and mechanical strength, approximately 2% higher than ordinary soda-lime glass, ensuring light penetration to the battery chip while also providing impact resistance and durability. The high-reflectivity mirror coating 4 uses silver or aluminum powder as the reflective material, mixed with resin, and has a thickness of 5-20µm. It reflects unused solar heat from the battery chip, reducing thermal aging and extending the module's lifespan. The EVA filler 6 is an ethylene-vinyl acetate copolymer with a thickness of 0.45-0.55mm, and the backing pad 9 is polyethylene terephthalate with a thickness of 0.3-0.5mm. It provides electrical insulation, preventing damage to the battery chip from the external environment and protecting the internal structure.

[0054] The embodiments of this application have now been described in detail. To avoid obscuring the concept of this application, some details known in the art have not been described. Those skilled in the art can fully understand how to implement the technical solutions disclosed herein based on the above description.

[0055] While specific embodiments of this application have been described in detail by way of examples, those skilled in the art should understand that the above examples are for illustrative purposes only and are not intended to limit the scope of this application. Those skilled in the art should understand that modifications can be made to the above embodiments or equivalent substitutions can be made to some technical features without departing from the scope and spirit of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any manner.

Claims

1. A photovoltaic module, comprising a photovoltaic panel, characterized in that: The photovoltaic panel includes: AF coating (1), wherein the AF coating (1) is disposed on the outermost layer of the photovoltaic panel; AR coating one (2), wherein the AR coating one (2) is disposed at the bottom of the AF coating (1); High aluminosilicate glass (3), wherein the high aluminosilicate glass (3) is disposed at the bottom of AR coating one (2); A high-reflectivity mirror coating (4) is disposed on the bottom of the high-aluminosilicate glass (3); AR coating two (5), the AR coating two (5) is disposed on the bottom of the high aluminosilicate glass (3); EVA filler (6), wherein the EVA filler (6) is disposed at the bottom of AR coating two (5); Tin-plated copper strip (7) is disposed at the bottom of EVA filler (6); Battery chip (8), the battery chip (8) is disposed at the bottom of EVA filling (6); A backing pad (9) is disposed at the bottom of the EVA filling (6); Junction box (10) is disposed at the bottom of back pad (9).

2. A photovoltaic module according to claim 1, characterized in that: The tin-plated copper strip (7) is fixedly connected to the battery chip (8), and the tin-plated copper strips (7) are interconnected.

3. A photovoltaic module according to claim 1, characterized in that: The AF coating (1) is made of polytetrafluoroethylene and has a thickness of 2-10 nm.

4. A photovoltaic module according to claim 1, characterized in that: The EVA filler (6) is an ethylene-vinyl acetate copolymer, and the thickness of the EVA filler (6) is 0.45-0.55 mm. The back pad (9) is polyethylene terephthalate, and the thickness of the back pad (9) is 0.3-0.5 mm.

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