CN216354234U

CN216354234U - Transparent substrate, photovoltaic module and preparation device of transparent substrate

Info

Publication number: CN216354234U
Application number: CN202122179462.2U
Authority: CN
Inventors: 马守鹏; 陈成锦; 胡斌; 孔锁元; 王学奎
Original assignee: Jiangsu Longi Solar Technology Co Ltd
Current assignee: Jiangsu Longi Solar Technology Co Ltd
Priority date: 2021-09-09
Filing date: 2021-09-09
Publication date: 2022-04-19
Anticipated expiration: 2031-09-09

Abstract

The utility model discloses a transparent substrate, a photovoltaic module and a preparation device of the transparent substrate, which relate to the technical field of solar module manufacture and are used for saving the production cost of the photovoltaic module. The transparent substrate, the photovoltaic module and the preparation device of the transparent substrate are used for generating and manufacturing the photovoltaic module.

Description

Transparent substrate, photovoltaic module and preparation device of transparent substrate

Technical Field

The utility model relates to the technical field of solar module manufacturing, in particular to a transparent substrate, a photovoltaic module and a preparation device of the transparent substrate.

Background

The photovoltaic module is a core unit of solar power generation, and is generally formed by laminating and packaging a plurality of battery pieces in a vacuum and high-temperature environment through front plate glass, packaging adhesive films, back plates or rear plate glass and other materials after the plurality of battery pieces are connected in series and in parallel through tinned copper strips.

In the existing production process, the adhesive film needs to be cut and laid on glass independently, and the problems of deviation, different lengths, adhesive film wrinkles and the like often occur in the laying process, so that the photovoltaic module has the bad phenomena of bubbles, fragments and the like after lamination, the module is degraded, the yield is reduced, and the production cost is correspondingly increased.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a transparent substrate, a photovoltaic module and a preparation device of the transparent substrate, which are used for avoiding the processes of cutting and laying a glue film in the production process of the photovoltaic module and improving the production efficiency.

In order to achieve the above purpose, the utility model provides the following technical scheme:

in a first aspect, the present invention provides a transparent substrate, which includes a substrate body, wherein a surface of the substrate body is provided with an adhesive film layer, and the adhesive film layer is fixed on the substrate body by means of melt coating.

Compared with the prior art, the technical scheme has the advantages that the transparent substrate provided with the adhesive film layer is adopted, a cutting machine and a laying process are not required to be specially arranged for cutting the adhesive film, and the condition of degradation of the photovoltaic module caused by laying deflection or length failure is avoided; the mode that adopts the melting material coating also ensures the connection reliability of the two, compares in traditional glued membrane process of laying, has avoided the condition that the glued membrane fold appears, has solved and has adopted traditional technique skew, the problem that differs in length often appears in the process of laying, has improved the product percent of pass.

Furthermore, the material of the adhesive film layer is EVA and/or POE.

In a second aspect, the present invention provides a photovoltaic module comprising: a battery string, a package cover plate and a package base plate, the package cover plate and/or the package base plate being the transparent substrate described in the first aspect.

By adopting the technical scheme, when the photovoltaic module is produced, the transparent substrate with the adhesive film layer is used, the adhesive film cutting and laying procedures are omitted, the cost is saved, the battery strings and the like can be directly stacked on the transparent substrate, the adhesive film is melted through high temperature when lamination is carried out, the quick packaging effect is achieved, and the production efficiency is improved.

In a third aspect, the present invention also provides an apparatus for manufacturing a transparent substrate, including:

a transfer mechanism for supporting and transferring the substrate body;

the discharge port of the melt coating mechanism corresponds to the substrate body on the conveying mechanism and is used for placing the melt on the substrate body;

and the compression roller is arranged above the conveying mechanism and corresponds to the substrate body on the conveying mechanism, and is used for coating the melt on the substrate body so as to form an adhesive film layer on the substrate body.

Compared with the prior art, when the technical scheme is adopted, the processes of cutting, laying and the like of the adhesive film are omitted, the cost is reduced, the substrate body moves on the conveying mechanism, the melt coating mechanism extrudes the melt for forming the adhesive film layer on the surface of the substrate body, the melt on the surface of the substrate body is extruded through the compression roller to be uniformly adhered on the surface of the substrate body, compared with the traditional adhesive film laying process, the generation of adhesive film wrinkles is avoided, the adverse phenomena of bubbles, fragments and the like of the photovoltaic module after lamination due to the wrinkles are avoided, the problems of offset and different lengths in the adhesive film laying process in the traditional technology are solved, when the photovoltaic module is produced, the battery strings and the like can be directly stacked on the adhesive-containing film surface of the transparent substrate, and the product qualification rate and the production efficiency are improved.

Further, the frit coating mechanism includes:

the extrusion die head of the extruder is arranged above the conveying mechanism and corresponds to the substrate body on the conveying mechanism;

the extruder and the rubber film raw material kettle are arranged at the outer side of the conveying mechanism;

and one end of the feeding pipeline is connected with a discharge opening of the adhesive film raw material kettle, and the other end of the feeding pipeline is connected with the extruder.

Further, the press roll is a water-cooled press roll.

Under the condition of adopting the scheme, due to the cooling function of the water-cooling press roller, the dissolved material can be quickly molded and adhered to the surface of the substrate body to form the adhesive film layer.

Furthermore, a heating plate which can enable the substrate body to be in a high-temperature state is arranged below the conveying mechanism.

Under the condition of adopting above-mentioned scheme, when photovoltaic module produces, through heating the base plate body, make the base plate body keep certain high temperature, just can directly stack the battery cluster on this base plate body, high temperature makes the rete melt during the lamination, reaches the effect of photovoltaic module quick encapsulation, improves production efficiency.

Furthermore, limiting baffles are symmetrically arranged on two sides of the conveying mechanism.

Furthermore, the height of the limit baffle is greater than the thickness of the substrate body.

Under the condition of adopting above-mentioned scheme, can prevent through limit baffle that the soluble material from overflowing, cause the waste of melt, also ensured that the soluble material of extruding through extrusion die head can all coat on the base plate body, accord with production standard.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model and not to limit the utility model.

Fig. 1 is a schematic structural diagram of a transparent substrate according to the present invention.

Fig. 2 is a schematic structural diagram of a device for manufacturing a transparent substrate according to the present invention.

In the figure:

1-a transport mechanism; 2-a press roll; 3-an extrusion die head; 4-a feeding pipeline; 5-limiting baffle plates; 6-heating plate; 10-a substrate body; 11-glue film layer.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the utility model and are not to be construed as limiting the utility model.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In traditional photovoltaic module production, lay between glass and battery piece after cutting the glued membrane, carry out lamination encapsulation, need specially establish the guillootine and lay the process and carry out cutting of glued membrane, and lay precision and cut size precision requirement height, difficult control easily leads to laying crooked or length not up to standard, causes the subassembly to have the bad condition such as bubble, fragment after the lamination, makes photovoltaic module degrade, increases manufacturing cost.

In order to solve the above problem, as shown in fig. 1, an embodiment of the utility model discloses a transparent substrate, which includes a substrate body 10, wherein a film layer 11 is disposed on a surface of the substrate body 10, and the film layer 11 and the substrate body 10 are combined to form a whole.

According to the scheme, compared with the prior art, the transparent substrate provided with the adhesive film layer 11 is adopted, the initial state of the used transparent substrate is the whole formed by combining the substrate body and the adhesive film layer, the non-traditional technology is formed by paving the adhesive film on the substrate body, a special cutting machine and a paving procedure are not needed for cutting the adhesive film, the cost is reduced, the situation that the photovoltaic module is degraded due to the fact that the adhesive film is paved askew or the length of the photovoltaic module does not reach the standard in the traditional technology is avoided, and the product percent of pass is improved.

For example, when the substrate body 10 is a transparent substrate, the substrate may be glass or a transparent polymer substrate, but is not limited thereto. The glass is generally toughened photovoltaic glass and can be low-iron ultra-white embossed toughened glass, low-iron ultra-white embossed semi-toughened glass and the like. The transparent polymer substrate may be a polyimide layer-containing substrate (PI), a polyethylene terephthalate layer-containing (PET) substrate, or the like. For example, the substrate may be selected from a TPT polymer substrate or a KPK polymer substrate. The substrate may be a polymer-glass composite substrate, a polymer composite substrate, a cellulose material substrate, a ceramic substrate, a woven material substrate, or the like.

The adhesive film layer 11 is formed by liquid melt in a coating mode and is fixed on the substrate body 10, so that the reliability of connection between the adhesive film layer and the substrate body is improved, the processes of cutting and laying an adhesive film are omitted, and the qualification rate of finished products is improved.

The material of the adhesive film layer 11 may be EVA (ethylene vinyl acetate copolymer), POE (polyethylene octene co-elastomer), or a combination of both materials, or an ionomer having strong adhesiveness and optical transparency, such as PVB (polyvinyl butyral resin).

An embodiment of the present invention further provides a photovoltaic module, including: a battery string, a package cover plate and a package base plate, the package cover plate and/or the package base plate being the transparent substrate described in the first aspect.

When the technical scheme is adopted for producing the photovoltaic module, the surface of the transparent substrate is provided with the adhesive film layer, the structure of the packaging cover plate, the battery string and the packaging bottom plate is directly adopted, two sides of the battery string are opposite to the adhesive film layer, compared with the structure of the traditional glass/packaging material/battery piece/packaging material/back plate, the packaging adhesive film is required to be laid additionally, the transparent substrate with the adhesive film layer 11 is used, a cutting machine and a laying process are not required to be specially arranged for cutting the adhesive film, the cost is saved, the battery string and the like can be directly stacked on the transparent substrate, the adhesive film layer 11 is melted through high temperature during lamination, the rapid packaging effect is achieved, and the production efficiency is improved.

The embodiment of the utility model also provides a device for preparing the transparent substrate, which is shown in fig. 2 and comprises a conveying mechanism 1, a melt coating mechanism and a pressing roller 2; wherein, the conveying mechanism 1 is used for supporting and conveying the substrate body 10; the discharge port of the melt coating mechanism corresponds to the substrate body 10 on the conveying mechanism 1 and is used for placing the melt on the substrate body 10; the pressing roller 2 is disposed above the conveying mechanism 1, corresponds to the substrate body 10 on the conveying mechanism 1, and is used for coating the melt on the substrate body 10 to form the adhesive film layer 11 on the substrate body 10.

Based on the structure, when the technical scheme is adopted for preparation, the substrate body 10 moves along the conveying mechanism 1, the melt coating mechanism extrudes the melt for forming the adhesive film layer 11 on the surface of the substrate body 10, the melt on the surface of the substrate body 10 is extruded by the compression roller 2 to be uniformly adhered on the surface of the substrate body 10, and the transparent substrate with the adhesive film layer 11 is obtained, so that the processes of cutting and laying of the adhesive film are omitted, the cost is reduced, compared with the traditional adhesive film laying process, the condition of adhesive film wrinkles is avoided, the adverse phenomena of bubbles, fragments and the like of the photovoltaic module after lamination due to the wrinkles are avoided, meanwhile, the problems of deviation and different lengths in the laying process by adopting the traditional technology are solved, and the product qualification rate is improved; and when the photovoltaic module is produced, the cell strings and the like can be directly stacked on the film surface containing the transparent substrate, so that the production efficiency is improved.

Optionally, the rolling direction of the compression roller 2 above the conveying mechanism 1 may be a direction perpendicular to the movement direction of the conveying mechanism 1, at this time, the axial direction of the compression roller 2 is parallel to the conveying direction, when the melt bearing on the surface of the substrate body 10 moves to the position below the compression roller 2, the conveying mechanism 1 stops, the compression roller 2 starts to roll, after the coating is finished, the conveying mechanism 1 operates to transport the next substrate body 10 to the position below the compression roller 2, and so on;

the rolling direction of the press roller 2 can also be parallel to the moving direction of the conveying mechanism 1, at this time, the axial direction of the press roller 2 is perpendicular to the conveying direction, the opening and the stopping of the conveying mechanism do not need to be controlled frequently, only the conveying speed of the conveying mechanism 1 needs to be reduced properly, and the press roller 2 acts on the surface of the substrate body 10, so that the process of coating the molten material can be realized.

In some embodiments, the frit coating mechanism may include: the device comprises an extruder, a film raw material kettle and a feeding pipeline 4, wherein an extrusion die head 3 of the extruder is arranged above a conveying mechanism 1 and corresponds to a substrate body 10 on the conveying mechanism 1; the extruder and the rubber film raw material kettle are both arranged at the outer side of the conveying mechanism 1; one end of the feeding pipeline 4 is connected with a discharge opening of the raw material kettle of the glue film, and the other end of the feeding pipeline is connected with the extruder. The melt is sent to the extruder through conveying pipeline 4 after the intensive mixing in glued membrane raw materials cauldron, and the extruder extrudes the melt to the corresponding base plate body 10 in below through extrusion die 3 on, again through the even surface of paining at base plate body 10 of compression roller 2.

The above-mentioned conveying mechanism 1 may adopt a belt conveying method or a conveying roller structure, and conveys the substrate body 10 by a conveying belt or a conveying roller.

Optionally, the extrusion die head 3 may be a conical structure, a cylindrical structure, or a strip structure, preferably a strip structure, and at this time, a discharge port with a larger area can be provided relative to other shapes, the molten material discharged from the extrusion die head 3 can be placed on the substrate body 10 in a large area, and the molten material can be completely and uniformly covered on the surface of the substrate body 10 through the pressing roller 2 relatively quickly, so that the photovoltaic substrate is ensured to reach the production standard.

For example, the strip-shaped extrusion die head 3 may be disposed above the conveying mechanism 1 in a direction perpendicular to the conveying direction, or disposed obliquely relative to the conveying direction, and when perpendicular to the conveying direction, the melt extruded by the extrusion die head 3 is flush with the substrate body 10, which is better for the compression roller 2 to uniformly and completely coat the melt on the substrate body 10.

In order to further optimize the technical scheme, the press roller 2 can adopt a water-cooling press roller, and due to the cooling function of the water-cooling press roller, the dissolved materials are quickly formed and adhered to the surface of the substrate body 10 to form the adhesive film layer 11.

For further optimizing above-mentioned technical scheme, transport mechanism 1's both sides are the symmetry and are provided with limit baffle 5, and limit baffle 5 highly be greater than base plate body 10's thickness, prevent to dissolve the material and spill limit baffle 5 by compression roller 2 extrusion process, cause the waste of raw materials, have also avoided the melt to splash and have spilt on transport mechanism 1, bring inconvenience for the cleanness and the maintenance of device, have kept operational environment's clean and tidy.

Preferably, the distance between the limiting baffles 5 at the two sides can be slightly larger than the width of the substrate body 10, so that the dissolved materials extruded by the extrusion die head 3 can be matched with the size of the substrate body 10 after being pressed by the compression roller 2, and subsequent cutting is not needed.

For further optimizing above-mentioned technical scheme, the below of transport mechanism 1 is provided with and enables base plate body 10 and be in hot plate 6 of high temperature state, makes it keep certain high temperature through heating base plate body 10, like this when photovoltaic module produces, just can directly stack the battery cluster on transparent substrate, utilizes high temperature to make glue film layer 11 melt when the lamination and reaches quick encapsulation effect, improves production efficiency.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples described in this specification can be combined and combined by those skilled in the art.

Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.

Claims

1. The transparent substrate is used for a photovoltaic module and is characterized by comprising a substrate body, wherein an adhesive film layer is arranged on the surface of the substrate body, and the adhesive film layer is fixed on the substrate body in a melt coating mode.

2. The transparent substrate of claim 1, wherein the adhesive layer is made of EVA and/or POE.

3. A photovoltaic module comprising a string of cells, an encapsulating cover and an encapsulating base, the encapsulating cover and/or the encapsulating base being a transparent substrate as claimed in any one of claims 1-2.

4. An apparatus for manufacturing a transparent substrate, comprising:

a transfer mechanism for supporting and transferring the substrate body;

the compression roller, the compression roller sets up conveying mechanism top, with conveying mechanism is last the base plate body correspond, be used for with the frit coat in on the base plate body, in order form the rete on the base plate body.

5. The apparatus for manufacturing a transparent substrate according to claim 4, wherein the frit coating mechanism comprises:

the extruder and the rubber film raw material kettle are arranged on the outer side of the conveying mechanism;

and one end of the feeding pipeline is connected with the discharge opening of the adhesive film raw material kettle, and the other end of the feeding pipeline is connected with the extruder.

6. The apparatus according to claim 4, wherein the press roller is a water-cooled press roller.

7. The apparatus according to claim 4, wherein a heating plate capable of heating the substrate body at a high temperature is provided below the transport mechanism.

8. The apparatus according to claim 4, wherein the two sides of the conveying mechanism are symmetrically provided with limit baffles.

9. The manufacturing apparatus of a transparent substrate according to claim 8, wherein the height of the position-limiting baffle is greater than the thickness of the substrate body.