PHOTOVOLTAIC MODULE WITH PATTERN AND PREPARATION METHOD THEREOF

The present disclosure relates to a photovoltaic module with pattern and a preparation method thereof. The photovoltaic module with pattern includes a photovoltaic cell layer and a transparent encapsulation structure encapsulating the photovoltaic cell layer, patterned gap spaces are provided inside the transparent encapsulation structure for forming a low refractive index region, and refractive index difference between the patterned gap spaces and a physical medium inside the photovoltaic module forms a pattern on a surface of the photovoltaic module. The preparation method thereof is: firstly, preparing the photovoltaic cell layer and various structural layers of an encapsulation structure, and then typesetting and laminating the same into a photovoltaic module.

CROSS-REFERENCE TO RELATED APPLICATION

The present disclosure claims the priority to the Chinese patent application with the filing number 202210182549.1 filed on Feb. 25, 2022 with the State Intellectual Property Office of China, and entitled “Photovoltaic Module with Pattern and Preparation Method thereof”, the contents of which are incorporated herein by reference in entirety.

TECHNICAL FIELD

The present disclosure relates to the technical field of photovoltaics, and in particular to a photovoltaic module with pattern and a preparation method thereof.

BACKGROUND ART

Since 2020, photovoltaics have become more and more close to human life. Besides current common large-scale above-ground or above water power stations, the photovoltaic technology is increasingly applied to different scenes such as roofs of households, building wall surfaces, and roofs of electric vehicles. In addition to the practicability demands for photovoltaic products, people are also starting to pursue the aesthetics and artistry of photovoltaic products more and more.

The US Tesla Company provides a color photovoltaic tile to replace the common roof, the Holland ECN provides a color photovoltaic module for color building, and in China, Hanergy photovoltaics, Changzhou TrinaSolar, and Baoding GAIN SOLAR, a subsidiary of Yingli Group, and so on have made a lot of pioneering explorations on the colorization of building photovoltaics. In recent years, companies such as Xi'an Longi Group and Jinko also put forward color photovoltaic module products, and work on the building photovoltaic market.

Generally, all of the above solutions of color photovoltaic module sacrifice the power generation efficiency of the photovoltaic module, and increase the power generation cost to the extent that the mainstream market cannot accept. Therefore, most of these products exist in the niche market as demonstration projects, and cannot become a mainstream.

All the existing color photovoltaic module solutions form a color pattern by adopting a mode of printing color paint or sputter coating, to improve the aesthetic degree of the module, for example, the Chinese invention patent CN113087406A High-temperature Tempered Colored Photovoltaic Glass Panel and Production Method thereof, and Colored Solar Photovoltaic Module, the Chinese invention patent CN109463011A Colored Photovoltaic Module, and the building color photovoltaic outer facade technology published in Energy Procedia 122 (2017) 175-180. Such a colorization solution of module will cause light shielding and large energy loss, and the power loss ranges in 15%-25%.

SUMMARY

The technical problem to be solved by the present disclosure is to provide a photovoltaic module with pattern and a preparation method thereof, to reduce the impact of photovoltaic module patterning on the power generation efficiency of the module.

A technical solution adopted by the present disclosure to solve the technical problem thereof is as follows: a photovoltaic module with pattern, including a photovoltaic cell layer and a transparent encapsulation structure encapsulating the photovoltaic cell layer, wherein a patterned gap space is provided inside the transparent encapsulation structure for forming a low refractive index region, and refractive index difference between the patterned gap space and the transparent encapsulation structure forms a pattern on a surface of the photovoltaic module.

It is further defined that the transparent encapsulation structure includes at least one patterned film layer, and the patterned film layer has patterned through holes, grooves or bubbles for forming the patterned gap space.

It is further defined that a side of the patterned gap space has an optical microstructure, for enhancing a pattern effect of a surface of the photovoltaic module.

It is further defined that the transparent encapsulation structure includes at least one patterned film layer, the patterned film layer is a patterned adhesive thin film layer, the patterned adhesive thin film layer has patterned through holes, grooves or bubbles, for forming the patterned gap space, and physical medium layers at two sides of the patterned adhesive thin film layer are non-flowing or low-flowing medium layers at a lamination temperature.

It is further defined that a physical medium layer at a side where the light incident surface of the patterned adhesive thin film layer is located is a non-flowing medium layer, an optical microstructure is provided on a side of the non-flowing medium layer facing the patterned adhesive thin film layer, the optical microstructure is distributed on the whole surface or a partial surface of the non-flowing medium layer, and the partial surface is a surface region corresponding to the patterned gap space.

It is further defined that the patterned adhesive thin film layer has a thickness of 5˜200 μm.

It is further defined that one side of the patterned adhesive thin film layer is provided with a photovoltaic cell layer, and the other side of the patterned adhesive thin film layer is provided with a transparent film layer.

It is further defined that a specific structure of the photovoltaic module with pattern includes, from top to bottom, a front cover plate, an encapsulation adhesive layer, a transparent film layer, a patterned adhesive thin film layer, a photovoltaic cell layer, a patterned adhesive thin film layer, a transparent film layer, an encapsulation adhesive layer, and a rear cover plate; alternatively, a specific structure includes, from top to bottom, a front cover plate, an encapsulation adhesive layer, a transparent film layer, a patterned adhesive thin film layer, a photovoltaic cell layer, an encapsulation adhesive layer, and a rear cover plate; alternatively, a specific structure includes, from top to bottom, a front cover plate, a patterned adhesive thin film layer, a photovoltaic cell layer, the patterned adhesive thin film layer, and a rear cover plate; and alternatively, a specific structure includes, from top to bottom, a front cover plate, a patterned adhesive thin film layer, a photovoltaic cell layer, an encapsulation adhesive layer, and a rear cover plate.

It is further defined that the transparent encapsulation structure includes at least one patterned film layer, the patterned film layer is the patterned adhesive thin film layer, and the patterned adhesive thin film layer has a patterned non-adhesive surface for forming the patterned gap space, and a physical medium layer at a side of the patterned adhesive thin film layer having the patterned non-adhesive surface is a non-adhesive medium layer at a lamination temperature.

It is further defined that the transparent encapsulation structure includes at least one patterned film layer, the patterned film layer is a patterned transparent film layer, the patterned transparent film layer has patterned grooves for forming the patterned gap space, and a physical medium layer at a side where the grooves of the patterned transparent film layer are located is a low-flowing adhesive medium layer.

It is further defined that the optical microstructure includes slots, convex-concave textures or point-mode polyhedrons.

It is further defined that a pattern of the patterned gap space is a sketch pattern, preferably a linear sketch pattern or a pen stipple pattern.

A preparation method of the above photovoltaic module with pattern includes, firstly, preparing the photovoltaic cell layer and various structural layers of an encapsulation structure, and then typesetting and laminating the above layers into a photovoltaic module.

It is further defined that the encapsulation structure includes a transparent encapsulation structure for incident light, the transparent encapsulation structure includes at least one patterned film layer, the patterned film layer is the patterned adhesive thin film layer, the patterned adhesive thin film layer has patterned bubbles for forming the patterned gap space, the physical medium layers at two sides of the patterned adhesive thin film layer are non-flowing or low-flowing medium layers at a lamination temperature, and the bubbles on the patterned adhesive thin film layer are formed by a bubbling or blowing method.

The beneficial effects of the present disclosure are as follows: the principle on which the solution of the present disclosure is based is mainly to change the direction of light rays by means of optical refraction, thus forming color and contrast. The light rays can still contribute to the generation of electricity by the module after changing direction through refraction, so that the power loss is smaller. Through reasonable product design, for example, through the sketch patterning design, the pattern area is reduced to be within 10%, then the power loss can be reduced to be within 2% or even lower.

In order to form strong refraction phenomenon and ensure that an obvious pattern can be observed on the surface of the photovoltaic module, the difference between the refractive index of the patterned region in the module and the refractive index of other encapsulation structures is preferably 0.5 or more. A common dispersion prism or ultra-thin optical glasses lens increases the refractive index of the polymer by a method of doping heavy atom/molecule with a large atomic weight, but this solution will increase the light absorption with reference to the definition of the nature of refractive index in The Feynman Lectures on Physics, volume1. The present disclosure generates a low refractive index region with a subtraction scheme, namely, by a method of manufacturing gap spaces in the encapsulation structure of the module, and the refractive index can be lower than or equal to 1. The absorption of light by the low refractive index region is low, the refractive index of common transparent encapsulation materials such as PET, EVA or glass is 1.51.6, the refractive index of silicon wafer and SiNx, SiOx, ITO and other materials on the surface of the silicon wafer is 2˜3.5, which makes the refractive index difference between the gap space and the transparent encapsulation materials or photovoltaic cell be 0.5 or more, and larger refractive index differences trigger or enhance the phenomenon of interfacial optical direction changing, which causes the difference in visual perception, and forms an obvious pattern on the surface of the photovoltaic module.

The solution of the present disclosure can manufacture the patterned space gaps through mechanical or laser processing, the manufacturing method is simple, the added cost is extremely low, and artistic culture patterns (such as Han tile lines of the Chinese nation) can be combined on the photovoltaic module to form a good decorative effect.

To sum up, compared with the prior art, the solution of the present disclosure has lower optical loss, simpler manufacturing, lower cost, and better performance, so that it is possible to generate artistic patterns on the surface of the photovoltaic module efficiently at a low cost.

In the drawings,1. front cover plate,2. encapsulation adhesive layer,3-1. transparent film layer,3-2. patterned adhesive thin film layer,4. photovoltaic cell layer,5. rear cover plate,6. patterned gap space,7. optical microstructure,8. through hole.

DETAILED DESCRIPTION OF EMBODIMENTS

Embodiment 1 As shown inFIGS.1,2,3,4,5,6,7, and10, a photovoltaic module with pattern includes a photovoltaic cell layer4and a transparent encapsulation structure encapsulating the photovoltaic cell layer4. The encapsulation structure encapsulating the photovoltaic cell layer4of the present Embodiment 1 is a transparent encapsulation structure, not excluding that the encapsulation structure of the photovoltaic cell layer4is a non-transparent encapsulation structure, especially for an encapsulation structure on a backside of the photovoltaic cell layer, such as a non-transparent rear cover plate. Patterned gap space6is provided inside the transparent encapsulation structure, wherein the patterned gap space6has a smaller refractive index than the transparent encapsulation structure, and forms a low refractive index region inside the photovoltaic module, and the refractive index difference between the patterned gap space6and physical medium inside the photovoltaic module enables a pattern to be formed on a surface of the photovoltaic module.

The transparent encapsulation structure includes at least one patterned film layer, wherein the patterned film layer is a patterned adhesive thin film layer3-2, and the patterned adhesive thin film layer3-2has patterned through holes8for forming the patterned gap space6; and physical medium layers at two sides of the patterned adhesive thin film layer3-2are non-flowing medium layers at a lamination temperature.

Specifically, the low refractive index region, formed by the gap space, of the photovoltaic module with pattern of Embodiment 1 is generated in a place close to the surface of the photovoltaic cell layer4. The non-flowing medium layer at one side of the patterned adhesive thin film layer3-2is the photovoltaic cell layer4, the non-flowing medium layer at the other side of the patterned adhesive thin film layer3-2is a transparent film layer3-1, and the transparent film layer3-1does not have fluidity at 150˜200° C.

The patterned adhesive thin film layer3-2is extremely thin, and has a thickness of 5˜200 μm. As the patterned adhesive thin film layer3-2is an extremely thin adhesive thin film, although this patterned adhesive thin film layer3-2can flow and crosslink during lamination, it is insufficient to fill the patterned through holes8on the patterned adhesive thin film layer3-2. Hence, after lamination, the through holes8form the patterned gap space6with a low refractive index, providing possibility for incident light to be refracted and change a propagation path.

A pattern of the patterned gap space6is a sketch pattern, preferably a linear sketch pattern, or a pen stipple pattern.FIG.2shows a schematic case. In this drawing, the through holes8on the surface of the patterned adhesive thin film layer3-2depict a texture in a shape of Chinese character “” in the Chinese traditional patterns.

The artistic pattern inFIG.2is just an example. In fact, totems and patterns are usually closely linked with the development of national culture. The Qin bricks and Han tiles decorated with patterns are important cultural heritages of Chinese civilization, for example, several typical classical patterns in FIGS. 3˜5 selected from Complete Collection of Chinese Patterns (Shandong Fine Arts Publishing House, 2009) edited by Mr. Wu Shan, and the pattern on Han dynasty stone relief inFIG.6. Like the texture in a shape of Chinese character “” in FIG.2, it is quite easy to manufacture these patterns on a large scale with the method disclosed in the present disclosure. Typical patterns of other nationalities, such as Egyptian patterns, are also well stored in museums around the world, such as French Louvre, and can also be manufactured on a large scale with the solution disclosed in the present disclosure.

As shown inFIG.1, a specific structure of the photovoltaic module with pattern includes, from top to bottom, a front cover plate1, an encapsulation adhesive layer2, a transparent film layer3-1, a patterned adhesive thin film layer3-2, a photovoltaic cell layer4, a patterned adhesive thin film layer3-2, a transparent film layer3-1, an encapsulation adhesive layer2, and a rear cover plate5. In order to simplify the drawing, a welding strip connecting cell pieces in the photovoltaic cell layer4is not drawn in the drawing.

The front cover plate1is made of glass, the rear cover plate5is made of glass, the encapsulation adhesive layer2is made of EVA or POE, the transparent film layer3-1is made of PET having no fluidity at 150˜200° C., and the patterned adhesive thin film layer3-2is made of EVA. The photovoltaic cells are electrically and mechanically connected as the photovoltaic cell layer4.

More specifically, the front cover plate1and the rear cover plate5are made of 2.0 mm tempered glass, the encapsulation adhesive layer2is made of POE with a weight of 560 g, the transparent film layer3-1is made of PET of 25 μm, the patterned adhesive thin film layer3-2is made of EVA of 50 μm, and the photovoltaic cell layer4is a heterojunction cell layer.

A preparation method of a photovoltaic module with pattern is as follows: firstly, preparing a photovoltaic cell layer4and various structural layers of an encapsulation structure, and then typesetting and laminating the layers into a photovoltaic module.

Specific steps are as follows.

Firstly, the photovoltaic cells are electrically and mechanically connected as the photovoltaic cell layer4, and a transparent film layer3-1and a patterned adhesive thin film layer3-2are compounded into a two-layer patterned composite layer, wherein the patterned adhesive thin film layer3-2is one adhesive thin film prepared by a tape casting method, and then through holes8are made on a surface of the adhesive thin film by a mechanical punching, mechanical cutting or laser treatment method, wherein the through holes8are dots or lines, so as to form an artistic pattern on the adhesive thin film, thus realizing the patterning of the adhesive thin film, and obtaining the patterned adhesive thin film layer3-2, as shown inFIG.7;then, as shown inFIG.10, a front cover plate1, an encapsulation adhesive layer2, the patterned composite layer, the photovoltaic cell layer4, the patterned composite layer, the encapsulation adhesive layer2, and a rear cover plate5are successively laid to complete the typesetting of the photovoltaic module; andfinally, the typeset photovoltaic module enters a laminator to undergo lamination to obtain the photovoltaic module with pattern of the present Embodiment 1.

FIG.13is a partial view of a photovoltaic module trial-manufactured through the technical solution of the present disclosure. In the photovoltaic module ofFIG.13, a patterned pattern of the patterned gap space6is straight stripe, a background color of a surface of the photovoltaic module is a natural color of the module, and the patterned gap space6forms a light-colored straight stripe foreground pattern on the surface of the photovoltaic module.

In Embodiment 2, in order to enhance the change of the patterned gap space6of Embodiment 1 to the light path, on the basis of Embodiment 1, as shown inFIG.8, an optical microstructure7is formed on a side where light incidence surface of the patterned gap space6is located, for enhancing the pattern effect of the surface of the photovoltaic module. Specifically, the optical microstructure7is manufactured on a side of the transparent film layer3-1facing the patterned adhesive thin film layer3-2. The optical microstructures7are linear slots, convex-concave textures or point-mode polyhedrons, etc., the point-mode polyhedrons are specifically pyramid points, regular hexagonal prisms, etc., and the linear slots are specifically slots of inverted and regular triangular columns, etc. The optical microstructures7are distributed on the whole surface or a partial surface of the transparent film layer3-1, and the partial surface is a surface region corresponding to the patterned gap space6.

A first method of manufacturing the optical microstructure7on the transparent film layer3-1is: mechanically sculpting a surface of the transparent film layer3-1close to the patterned adhesive thin film layer3-2, to form linear slots, convex-concave textures or point-mode polyhedrons with specific angles and sizes on the surface.

A second method of manufacturing the optical microstructure7on the transparent film layer3-1is: coating a layer of polymeric film on the surface of the transparent film layer3-1close to the patterned adhesive thin film layer3-2, then forming the optical microstructure7in a manner of embossing or rolling, so as to form linear slots, convex-concave textures or point-mode polyhedrons with a specific angle and size on the surface; and then shaping by hot curing, light curing or other energy curing means.

In Embodiment 3, as shown inFIG.9andFIG.11, compared with Embodiment 1, the low refractive index region formed by the gap space of the photovoltaic module with pattern of the present Embodiment 3 is generated in a place close to the surface of the front cover plate1.

As shown inFIG.9, a specific structure of the photovoltaic module with pattern includes, from top to bottom, the front cover plate1, the patterned adhesive thin film layer3-2, the photovoltaic cell layer4, the encapsulation adhesive layer2, and the rear cover plate5.

Compared with the conventional encapsulation adhesive layer2, the patterned adhesive thin film layer3-2has poorer fluidity at a lamination temperature. This patterned adhesive thin film layer3-2is generally a pre-crosslinked polymeric film, a low-melt-index polymeric film or a fiber-reinforced polymeric enhancement film. Through holes8can also be made on the surface of the patterned adhesive thin film layer3-2by a mechanical punching, mechanical cutting or laser treatment method, realizing the patterning.

More specifically, the front cover plate1is made of 3.2 mm tempered glass, the patterned adhesive thin film layer3-2is made of low-melt-index EVA with a weight of 560 g, the photovoltaic cell layer4is made of a PERC cell layer, the encapsulation adhesive layer2is made of conventional EVA with a weight of 560 g, and the rear cover plate5is a TPT back plate.

Specific steps of the preparation method of the photovoltaic module with pattern are as follows:firstly, the photovoltaic cell layer4and various structural layers of an encapsulation structure are prepared;then, as shown inFIG.11, the front cover plate1, the encapsulation adhesive layer2, the patterned adhesive thin film layer3-2, the photovoltaic cell layer4, the encapsulation adhesive layer2, and the rear cover plate5are successively laid to complete the typesetting of the photovoltaic module; andfinally, the typeset photovoltaic module enters a laminator to undergo lamination to obtain the photovoltaic module with pattern of the present Embodiment 3.

In Embodiment 4, compared with Embodiment 3, an optical microstructure7is manufactured on a lower surface of the front cover plate1of a glass material on the basis of Embodiment 3, and the optical microstructure7may be simply formed in the process of glass rolling and embossing.

Embodiment 5 is a second solution of forming the low refractive index region by the gap space in a place close to the surface of the front cover plate1. Embodiment 5 is substantially the same as Embodiment 1, and differs in that: a specific structure of the photovoltaic module with pattern includes, from top to bottom, the front cover plate1, the patterned adhesive thin film layer3-2, the transparent film layer3-1, the encapsulation adhesive layer2, the photovoltaic cell layer4, the patterned adhesive thin film layer3-2, the transparent film layer3-1, the encapsulation adhesive layer2, and the rear cover plate5.

The front cover plate1is made of 3.2 mm tempered glass, the patterned adhesive thin film layer3-2is made of EVA of 50 nm, the transparent film layer3-1is made of PET of 25 nm, the encapsulation adhesive layer2is made of POE with a weight of 560 g, and the photovoltaic cell layer4is a TOPCON cell layer.

The patterned adhesive thin film layer3-2, the transparent film layer3-1, and the encapsulation adhesive layer2are compounded into a three-layer patterned composite layer for typesetting and lamination.

As shown inFIG.12, the typesetting step is: successively laying the front cover plate1, the patterned composite layer, the photovoltaic cell layer4, the patterned composite layer, and the rear cover plate5to complete the typesetting of the photovoltaic module.

Embodiment 6, substantially the same as Embodiment 1, differs in that the rear cover plate5is a TPT back plate.

The typesetting step is: successively laying 2.0 mm tempered glass, POE with a weight of 560 g/m2, the patterned composite layer compounded by two layers of EVA and PET in Embodiment 1, a heterojunction photovoltaic cell layer4, the patterned composite layer compounded by two layers of EVA and PET in Embodiment 1, POE with a weight of 560 g/m2, and the TPT back plate, to complete the typesetting of the photovoltaic module.

Embodiment 7, substantially the same as Embodiment 1, differs in that the patterned film layer is a patterned transparent film layer, the patterned transparent film layer has a patterned groove for forming the patterned gap space6, and a physical medium layer at one side of the groove of the patterned transparent film layer is a low-flowing adhesive medium layer.

Specifically, the patterned transparent film layer is specifically the front cover plate1in the encapsulation structure, and the patterned groove is fabricated on a lower surface of the front cover plate1facing the photovoltaic cell layer4.

A specific structure of the photovoltaic module with pattern includes, from top to bottom, the patterned front cover plate1, the encapsulation adhesive layer2, the photovoltaic cell layer4, the encapsulation adhesive layer2, and the rear cover plate5.

The encapsulation adhesive layer2is a pre-crosslinked polymeric film, a low-melt-index polymeric film or a fiber-reinforced polymeric enhancement film, and belongs to a low-flowing adhesive medium layer with poor fluidity, and in a lamination process, the encapsulation adhesive layer2will not fill in the patterned groove on the patterned adhesive thin film layer3-2.

Embodiment 8, substantially the same as Embodiment 1, differs in that: the encapsulation structure includes a transparent encapsulation structure for light incidence, and the transparent encapsulation structure includes a patterned film layer, wherein the patterned film layer is the patterned adhesive thin film layer3-2, the patterned adhesive thin film layer3-2has patterned bubbles for forming the patterned gap space6, the physical medium layers at two sides of the patterned adhesive thin film layer3-2are non-flowing or low-flowing medium layers at a lamination temperature, and the bubbles on the patterned adhesive thin film layer3-2are formed by a bubbling or blowing method.

A specific structure of the photovoltaic module with pattern includes, from top to bottom, the front cover plate1, the patterned adhesive thin film layer3-2, the photovoltaic cell layer4, the encapsulation adhesive layer2, and the rear cover plate5.

An encapsulation adhesive material having low fluidity, such as a pre-crosslinked film, a low-melt-index film, or a fiber-reinforced film, is selected as the patterned adhesive thin film layer3-2, and during the process of tape casting or coating manufacturing, the bubbles are formed in the patterned adhesive thin film layer3-2in a manner of bubble doping, to realize the patterning. The manner of bubble doping includes bubble doping manners such as bubbling and blowing. Meanwhile, the patterned adhesive thin film layer3-2is non-uniformly cured by a method with plasma, heat, light, electromagnetic waves, or the like alternatively or in combination, and the physical medium layers at the two sides of the patterned adhesive thin film layer3-2are non-flowing or low-flowing medium layers at a lamination temperature. The two manners ensure that the patterned adhesive thin film layer3-2will not disappear as being filled with other medium layer materials during the lamination process.

A specific method of bubble doping in a bubbling manner is: in the process of tape casting or coating manufacturing, selectively adding a bubbling agent (foaming agent) into different regions of the material of the patterned adhesive thin film layer3-2, and controlling the concentration of the bubbling agent according to the patterning requirements, wherein the higher the concentration of the bubbling agent is, the more the bubbles are generated, and the more the patterned gap spaces6are formed, and the lower the concentration of the bubbling agent is, the fewer the bubbles are generated, and the fewer the patterned gap spaces6are formed, and according to the principle of sketch, a sketch pattern will be formed on the surface of the photovoltaic module.

Specific steps of a preparation method of the photovoltaic module with pattern of Embodiment 8 are as follows:firstly, photovoltaic cells are electrically and mechanically connected into the photovoltaic cell layer4, and during the process of tape casting or coating manufacturing of an adhesive thin film material of the patterned adhesive thin film layer3-2, the bubbling agent is selectively added in different regions;then, the front cover plate1, the adhesive thin film material added with the bubbling agent, the photovoltaic cell layer4, the encapsulation adhesive layer2, and the rear cover plate5are successively laid, to complete the typesetting of the photovoltaic module; andFinally, the typeset photovoltaic module enters a laminator to undergo lamination, and the bubbling agent generates bubbles at a lamination temperature, so that the adhesive thin film material added with the bubbling agent is patterned, and the adhesive thin film material added with the bubbling agent is formed into the patterned adhesive thin film layer3-2, to obtain the photovoltaic module with pattern of the present Embodiment 8.

Embodiment 9, substantially the same as Embodiment 1, differs in that the transparent encapsulation structure includes at least one patterned film layer, the patterned film layer is the patterned adhesive thin film layer3-2, and the patterned adhesive thin film layer3-2has a patterned non-adhesive surface for forming the patterned gap space6. A physical medium layer at a side of the patterned adhesive thin film layer3-2with the patterned non-adhesive surface is a non-adhesive medium layer at a lamination temperature.

A specific structure of the photovoltaic module with pattern includes, from top to bottom, the front cover plate1, the patterned adhesive thin film layer3-2, the photovoltaic cell layer4, the encapsulation adhesive layer2, and the rear cover plate5.

The patterned adhesive thin film layer3-2is non-uniformly cured by a method with plasma, heat, light, electromagnetic waves or the like, to realize the patterning of the patterned adhesive thin film layer3-2, and specifically the laser is preferred as a patterning processing workpiece. The adhesive thin film material of the patterned adhesive thin film layer3-2will be non-uniformly cured under the action of laser, to form a non-adhesive surface, and the patterned gap space6will be formed between the non-adhesive surface and the front cover plate1after the typesetting and lamination.

By adjusting the laser parameters, the curing degree of the adhesive thin film material of the patterned adhesive thin film layer3-2can be adjusted. Different curing degree leads to different adhesive property. Laser grooving and poring can also be realized by the laser.

Embodiment 10, substantially the same as Embodiment 1, differs in that in Embodiment 1, the transparent film layer3-1and the patterned adhesive thin film layer3-2are directly compounded by hot pressing, while in the present Embodiment 10, the transparent film layer3-1and the patterned adhesive thin film layer3-2are bonded and compounded by an adhesive to form a patterned composite layer.