CN217691192U

CN217691192U - Light photovoltaic back sheet and laminated photovoltaic module

Info

Publication number: CN217691192U
Application number: CN202221555402.4U
Authority: CN
Inventors: 王耀明; 周晓文; 孟明兴
Original assignee: Shandong Zhongke Taiyang Photoelectric Technology Co ltd
Current assignee: Shandong Zhongke Taiyang Photoelectric Technology Co ltd
Priority date: 2022-01-18
Filing date: 2022-06-21
Publication date: 2022-10-28
Anticipated expiration: 2032-06-21

Abstract

The application discloses a light photovoltaic back plate and a laminated photovoltaic assembly, wherein the light photovoltaic back plate comprises a first fiber flat plate layer and a plurality of corrugated strips, wherein the plurality of corrugated strips are arranged on the back of the first fiber flat plate layer and distributed side by side along the extending direction of the first fiber flat plate layer; the laminated photovoltaic module comprises the light photovoltaic back plate, and a first photovoltaic packaging adhesive film, a photovoltaic chip, a second photovoltaic packaging adhesive film and a photovoltaic front plate which are sequentially laid on the top of the light photovoltaic back plate, wherein the first photovoltaic packaging adhesive film and the second photovoltaic packaging adhesive film are made of the same material; the application provides a light photovoltaic backplate and lamination photovoltaic module is on ensureing the basis of lightweight, and the rigidity of promotion photovoltaic backplate that can be very big promotes photovoltaic backplate's shock resistance, reduces the risk that the cell piece takes place to split.

Description

Light photovoltaic back sheet and laminated photovoltaic module

Technical Field

The utility model relates to a photovoltaic module equipment especially relates to light photovoltaic backplate and lamination photovoltaic module.

Background

The reliability, safety and low cost of the photovoltaic module are always the focus of attention in the photovoltaic industry, and although the reliability and safety of the photovoltaic module are improved to a great extent by using the glass panel and the aluminum frame, the weight of the photovoltaic module is also the same as the water rise height.

In recent years, with the advancement of building-integrated photovoltaic, glass components with large weight encounter bottlenecks in the practical application process, so that a lot of buildings are forced to abandon the building-integrated photovoltaic scheme due to the fact that the bearing design does not meet the standard. Therefore, the development of a photovoltaic module which is safe, reliable, low in cost and light in weight is also receiving increasing attention from the industry. Especially in the application of a roof photovoltaic power station, the light component can be used on a roof with relatively poor bearing capacity, and the bearing design requirement and the construction cost of a building can be reduced to a great extent.

SUMMERY OF THE UTILITY MODEL

An advantage of the utility model is that a light photovoltaic backplate is provided, wherein the integrated design of first fibre dull and stereotyped layer and corrugated strip can be on the basis of ensureing that photovoltaic backplate and photovoltaic module are light, and very big promotion photovoltaic backplate's rigidity promotes the shock resistance of photovoltaic backplate, reduces the risk that the cell piece takes place the lobe of a leaf, and then has promoted the photovoltaic backplate and has used the photovoltaic module's of this photovoltaic backplate reliability and security, the cost is reduced.

An advantage of the utility model is that a lamination photovoltaic module is provided, through the rigidity that many flute strips that distribute side by side can the preferred, prevent the damage that photovoltaic module caused because of the bending sinks, and then reduces the risk of inefficacy, is showing simultaneously and improves photovoltaic module's shock resistance and snow load-carrying capacity, on very big improvement rigidity's basis, can also effectively reduce photovoltaic module's cost.

In order to achieve the utility model discloses above at least one advantage, the first aspect, the utility model provides a light photovoltaic backplate, include:

a first fiber flat layer; and

and the plurality of corrugated strips are arranged on the back of the first fiber flat plate layer and distributed side by side along the extending direction of the first fiber flat plate layer.

According to the utility model discloses an embodiment, first dull and stereotyped layer of fibre with flute strip integrated into one piece.

According to the utility model discloses an embodiment, the dull and stereotyped layer of first fibre with flute strip hot melt pressurization is compound or the bonding shaping.

According to the utility model discloses an embodiment, the thickness of the dull and stereotyped layer of first fibre is 0.2mm ~ 50mm.

According to the utility model discloses an embodiment, the corrugated strip is solid construction or hollow structure.

According to the utility model discloses an embodiment, the shape of the cross-section of corrugated strip is semi-circular, semiellipse shape, rectangle, triangle-shaped, T font or I-shaped.

According to the utility model discloses an embodiment, the width of corrugated strip is 0.2mm ~ 50mm, the thickness of corrugated strip is 0.2mm ~ 50mm.

According to the utility model discloses an embodiment, the corrugated strip is made by thermoplastic polymer.

According to the utility model discloses an embodiment, many the corrugated strip in arrange interval less than or equal to 1000mm on the dull and stereotyped layer of first fibre.

In a second aspect, the application further provides a laminated photovoltaic module, which comprises the light photovoltaic backboard and a first photovoltaic packaging adhesive film, a photovoltaic chip, a second photovoltaic packaging adhesive film and a photovoltaic front plate which are sequentially laid on the top of the light photovoltaic backboard, wherein the first photovoltaic packaging adhesive film is made of the same material as the second photovoltaic packaging adhesive film.

These and other objects, features and advantages of the present invention will become more fully apparent from the following detailed description.

Drawings

Fig. 1 shows a schematic front cross-sectional view of a light photovoltaic back sheet according to the present application, in which corrugated strips are solid structures.

Fig. 2 shows a schematic front cross-sectional view of the corrugated strip in the light photovoltaic back sheet of the present application as a hollow structure.

Fig. 3 shows a schematic view of the cross-sectional shape of the corrugated strip cited in the present application.

Fig. 4 shows a schematic structural diagram of the light photovoltaic back sheet of the present application when applied to a small cell assembly.

Fig. 5 shows a schematic structural diagram of the light photovoltaic back plate applied to a color steel tile roof.

Fig. 6 shows an exploded structural schematic of the laminated photovoltaic module of the present application.

Reference numerals: 1-light photovoltaic back plate, 101-first fiber flat plate layer, 102-corrugated strip, 8-color steel tile, 801-water chute, 9-small cell assembly, 11-cell sheet, 12-photovoltaic solder strip, 4-first photovoltaic packaging adhesive film, 5-photovoltaic chip, 6-second photovoltaic packaging adhesive film and 7-photovoltaic front plate.

Detailed Description

The following description is presented to disclose the invention so as to enable any person skilled in the art to practice the invention. The preferred embodiments in the following description are given by way of example only, and other obvious variations will occur to those skilled in the art. The basic principles of the invention, as defined in the following description, may be applied to other embodiments, variations, modifications, equivalents and other technical solutions without departing from the spirit and scope of the invention.

It will be understood by those skilled in the art that in the disclosure of the specification, the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships that are based on those shown in the drawings, which are merely for convenience in describing the invention and to simplify the description, and do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and, therefore, the above-described terms should not be construed as limiting the invention.

It is understood that the terms "a" and "an" should be interpreted as meaning that a number of one element or element is one in one embodiment, while a number of other elements is one in another embodiment, and the terms "a" and "an" should not be interpreted as limiting the number.

The applicant notices that the light photovoltaic back panel mostly adopts the polymer sheet as the back panel for packaging the photovoltaic module, which can reduce the weight of the photovoltaic module to a great extent, but the polymer sheet is soft and has insufficient rigidity, the support for the cell is insufficient, the risk of cell splitting is high, and the reliability and the safety of the photovoltaic module are reduced. If a thicker polymer sheet is used as the backing sheet, the cost is higher.

Therefore, the applicant proposes a lightweight photovoltaic back sheet, referring to fig. 1 to 5, wherein the lightweight photovoltaic back sheet 1 comprises a first fiber flat sheet layer 101 and a plurality of corrugated strips 102, wherein the plurality of corrugated strips 102 are arranged on the back of the first fiber flat sheet layer 101, and are arranged side by side along the extending direction of the first fiber flat sheet layer 101. Therefore, the light photovoltaic back plate 1 made of the fiber material can effectively improve the rigidity of the light photovoltaic back plate 1 on the basis of reducing the weight of the photovoltaic module, and meanwhile, the corrugated strips 102 can further enhance the rigidity of the first fiber flat plate layer 101, so that the impact resistance of the light photovoltaic back plate 1 is improved, and the support strength of the cell is improved; in addition, because a plurality of corrugated strips 102 are distributed side by side along the extending direction of the first fiber flat plate layer 101, the corrugated strips can be uniformly distributed and can also be non-uniformly distributed, so that the flexibility of the light photovoltaic back plate 1 in the length direction is smaller, the rigidity in the length direction can be improved in the processes of carrying and assembling, the risk of cell cracking is reduced, and finally, the reliability and the safety of the photovoltaic back plate and the whole photovoltaic module using the photovoltaic back plate are improved with very little cost.

In one embodiment, the first flat fiber layer 101 is integrally formed with the corrugated rim 102, thereby facilitating manufacturing and forming and having better structural strength.

In another embodiment, the first flat fiber layer 101 and the corrugated strip 102 may be formed by hot-melt pressure compounding or bonding.

Further preferably, the thickness of the first flat fiber sheet layer 101 is 0.2mm to 50mm, for example: 0.5mm, 2mm, 18mm, 25mm or 35mm, etc.

Preferably, in conjunction with fig. 1, the corrugated strip 102 is a solid structure; alternatively, in conjunction with fig. 2, the corrugated strip 102 is a hollow structure. Can select according to specific needs to as when solid structure, can provide the rigidity of preferred connection, and when as hollow structure, can be lighter, further lighten weight.

Preferably, in conjunction with fig. 3, the cross-section of the corrugated strip 102 is in the shape of a semicircle, a semi-ellipse, a rectangle, a triangle, a T-shape or an i-shape.

Further preferably, the width of the corrugated strip 102 is 0.2mm to 50mm, for example: 0.5mm, 2mm, 18mm, 25mm, or 35mm, etc.; the thickness of the corrugated strip 102 is 0.2mm to 50mm, for example: 0.5mm, 2mm, 18mm, 25mm or 35mm, etc.

Further, the corrugated strip 102 is preferably made of a thermoplastic polymer.

Further preferably, the arrangement pitch of the plurality of corrugated battens 102 on the first fiber flat sheet layer 101 is less than or equal to 1000mm, for example, 800mm or 900mm.

In the application of the small cell assembly 9, as shown in fig. 4, for example, a six-segment series-welded cell is formed by series-welding six-segment cells 11 and photovoltaic solder strips 12, and is laminated between the lightweight photovoltaic back sheet and the photovoltaic front sheet. The corrugated strip 102 is parallel to the long side direction of the six-piece battery piece. In the short side direction of the six-piece battery piece, the flexibility of the battery string is larger; and in the long side direction of the six-piece battery piece, the flexibility of the battery string is smaller. In the assembly carrying and mounting process, if the rigidity of the light photovoltaic back panel 1 is insufficient, the risk of splintering is easy to occur, and the assembly fails. The lightweight photovoltaic back panel 1 in the application can effectively improve the rigidity of the battery assembly in the direction through the corrugated strip 102 structure on the back, and reduces failure risks. The application is not limited to six-piece battery pieces, and battery pieces of other sizes are also applicable. The application is not limited to series-welded battery packs, and laminated batteries are also suitable.

In addition, as shown in fig. 5, for example, in a color steel tile roof power station application, the light photovoltaic back panel 1 is installed on the top of the color steel tile 8, and the corrugated strips 102 on the back of the light photovoltaic back panel 1 are perpendicular to the water chutes 801 on the color steel tile 8. The corrugated strip 102 can effectively prevent the light photovoltaic back panel 1 from being damaged due to bending and collapsing, so that the impact resistance and snow load capacity of the light photovoltaic back panel 1 and related components thereof are remarkably improved.

In a second aspect, with reference to fig. 6, based on the same working principle, the present application further provides a laminated photovoltaic module, which includes the aforementioned light photovoltaic back panel 1 and a first photovoltaic encapsulation adhesive film 4, a photovoltaic chip 5, a second photovoltaic encapsulation adhesive film 6 and a photovoltaic front plate 7 sequentially laid on the top of the light photovoltaic back panel 1, wherein the first photovoltaic encapsulation adhesive film 4 is made of the same material as the second photovoltaic encapsulation adhesive film 6.

It should be noted that the thermoplastic polymer composing the first fiber flat layer 101 and the corrugated ribs 102 includes, but is not limited to, epoxy resin, polyethylene terephthalate, polyimide, acrylic resin, phenolic resin, polyvinyl chloride resin, etc., and the fiber material includes, but is not limited to, glass fiber, aramid fiber, carbon fiber, etc.

In addition, the first photovoltaic encapsulant film material 4 includes, but is not limited to, ethylene-vinyl acetate copolymer, ethylene-octene copolymer, polyvinyl alcohol Ding Quanzhi, and the like.

In addition, the photovoltaic chip 5 includes, but is not limited to, a single crystalline silicon cell, a polycrystalline silicon cell, and the like.

In addition, the photovoltaic front plate 7 may be made of, but not limited to, polyethylene terephthalate, ethylene-tetrafluoroethylene copolymer, polyvinylidene fluoride, or the like, or may be made of two or more of the foregoing materials.

It should be noted that the terms "first and second" in the present invention are used for descriptive purposes only, do not denote any order, are not to be construed as indicating or implying any relative importance, and are to be interpreted as names.

It will be understood by those skilled in the art that the embodiments of the present invention described above and shown in the drawings are given by way of example only and are not limiting of the present invention. The advantages of the present invention are already complete and effectively realized. The functional and structural principles of the present invention have been shown and described in the embodiments without departing from the principles, embodiments of the present invention may have any deformation or modification.

Claims

1. A lightweight photovoltaic backsheet, comprising:

a first fiber flat layer; and

the corrugated strips are arranged on the back of the first fiber flat plate layer and distributed side by side along the extending direction of the first fiber flat plate layer.

2. The lightweight photovoltaic backsheet of claim 1, wherein said first flat layer of fibers is integrally formed with said corrugated strips.

3. The lightweight photovoltaic back sheet according to claim 1, wherein the first flat fiber layer is thermally fused and pressure-laminated or adhesively bonded to the corrugated strips.

4. The lightweight photovoltaic backsheet according to claim 2 or 3, wherein said first flat sheet layer has a thickness of 0.2mm to 50mm.

5. The lightweight photovoltaic backsheet of claim 1, wherein said corrugated strips are solid or hollow.

6. The lightweight photovoltaic backsheet according to claim 1, wherein said corrugated strips have a cross-sectional shape of a semicircle, a semi-ellipse, a rectangle, a triangle, a T-shape or an i-shape.

7. The lightweight photovoltaic backsheet according to claim 6, wherein the width of the corrugated strips is 0.2mm to 50mm and the thickness of the corrugated strips is 0.2mm to 50mm.

8. The lightweight photovoltaic backsheet according to any one of claims 5 to 7, wherein said corrugated strips are made of a thermoplastic polymer.

9. The lightweight photovoltaic backsheet according to claim 8, wherein a pitch of arrangement of a plurality of said corrugated strips on said first flat fiber layer is 1000mm or less.

10. The laminated photovoltaic module is characterized by comprising the light photovoltaic back plate as claimed in any one of claims 1 to 9, and a first photovoltaic packaging adhesive film, a photovoltaic chip, a second photovoltaic packaging adhesive film and a photovoltaic front plate which are sequentially laid on the top of the light photovoltaic back plate, wherein the first photovoltaic packaging adhesive film and the second photovoltaic packaging adhesive film are made of the same material.