CN211828790U

CN211828790U - Packaging adhesive film and photovoltaic module

Info

Publication number: CN211828790U
Application number: CN201922365340.5U
Authority: CN
Inventors: 张秀芳; 刘俊辉; 郭志球
Original assignee: Zhejiang Jinko Solar Co Ltd; Jinko Solar Co Ltd
Current assignee: Zhejiang Jinko Solar Co Ltd; Jinko Solar Co Ltd
Priority date: 2019-12-25
Filing date: 2019-12-25
Publication date: 2020-10-30
Anticipated expiration: 2029-12-25

Abstract

The utility model discloses a packaging adhesive film and photovoltaic module, packaging adhesive film include from the bottom up the rete, stratum basale and the reflector layer that sets gradually, the reflector layer sets up the battery piece clearance of stratum basale, the reflector layer includes reflection of light structure for will arrive at the light reflection in battery piece clearance the battery piece district of stratum basale. Through combining reflector layer and current glued membrane layer, realize that the subassembly utilizes the sunshine in battery piece clearance, the reflector layer is located between two-layer encapsulation glued membrane, isolated external steam has improved the reliability of subassembly.

Description

Packaging adhesive film and photovoltaic module

Technical Field

The utility model relates to a photovoltaic module prepares technical field, and more specifically says, relates to a packaging adhesive film and photovoltaic module.

Background

With global temperature rise and increasingly worsened environment, the pollution of the traditional fossil energy to the environment and the greenhouse effect make renewable energy become the inevitable choice for sustainable development. With the development of the crystal silicon technology, the photovoltaic power generation cost is continuously reduced, and the price is balanced, so that the net surfing is a necessary trend. The light energy is fully utilized, and the power of the component is improved to become the target of pursuing in the photovoltaic industry.

In the design of the photovoltaic module, certain gaps are reserved between the cells and between the strings for short, namely, the inter-cell distance and the inter-string distance due to safety consideration. Taking a 72P conventional dual-glass assembly as an example, the spacing between the sheets is 1.8mm, the spacing between the strings is 1.9mm, and the area of the sheet/string gap area accounts for 2.79 percent of the area of the whole assembly. And the part of light irradiating the assembly is basically directly transmitted on the assembly glass or diffusely reflected on the back plate, so that the light cannot be utilized by the assembly.

At present, most manufacturers adopt a white high-reflectivity back plate or white EVA (ethylene vinyl acetate) to increase the diffuse reflection of light in a module, but the two methods have unsatisfactory light reflection effect (generally, 72 plates increase the power by about 2-3W). And high reflectivity backplate and white EVA are only applicable to single face subassembly, and power promotion still is a difficult problem on the two-sided subassembly.

Few manufacturers have developed gap lamination equipment, typically laminating a film on the inner surface of the back plate or cover glass (at a location just between the cell string spacing and the chip spacing). However, this equipment is not mature at present, and the double heating (film sticking, assembly lamination) of the inner adhesive film of the film strip easily causes a lot of bubbles on the side of the film strip close to the back plate, and the crossed point of the film strip is higher than the heights of the two film strips, so that the bubbles are easy to generate, the bubbles are not beautiful on the transparent back plate and the glass, and the failure risk of delaminating the film strip and the back plate after aging exists. In addition, the aluminum reflective layer in the transparent backboard component has no other protective layer under long-term damp and hot, and the reflective layer is easy to hydrolyze, so that the power of the component is reduced.

SUMMERY OF THE UTILITY MODEL

The utility model provides a packaging adhesive film and photovoltaic module has increased the effective light receiving area of subassembly, has solved the problem that the effective light utilization area of subassembly is low.

In order to solve the technical problem, the utility model provides a pair of encapsulation glued membrane, including rete, stratum basale and the reflector layer that from the bottom up set gradually, the reflector layer sets up the battery piece clearance of stratum basale, the reflector layer includes reflection of light structure for arrive at the light reflection in battery piece clearance the battery piece district of stratum basale.

Wherein the substrate layer is a PVDF substrate layer, a PVF substrate layer or a PE substrate layer.

Wherein the thickness of the light reflecting layer is 50 nm-100 nm.

The light reflecting structure of the light reflecting layer is an inverted triangular prism structure or a pyramid structure.

The light reflecting structure of the light reflecting layer is an inverted triangular prism structure, the cross section of the inverted triangular prism structure is an isosceles triangle, the vertex angle of the isosceles triangle is 100-120 degrees, and the base angle is 30-40 degrees.

Wherein the thickness of the substrate layer is 35-50 μm.

Wherein the reflecting layer is an aluminum reflecting layer or an aluminum oxide reflecting layer.

In addition, the embodiment of the utility model provides a photovoltaic module is still provided, including lower glued membrane layer, battery lamella and the rubberizing rete that from the bottom up set gradually, lower glued membrane layer is last the encapsulation glued membrane, the battery lamella sets up the battery piece district that the battery piece clearance of encapsulation glued membrane surrounded.

The battery piece in the battery piece layer is a single-sided battery piece or a double-sided battery piece.

The embodiment of the utility model provides a packaging adhesive film and photovoltaic module compare with prior art, have following advantage:

encapsulation glued membrane and photovoltaic module through combining reflector layer and current glued membrane layer, reflects the battery piece through the sunshine that sets up the reflector layer that will shine in battery clearance, realizes that the subassembly utilizes the sunshine in battery piece clearance, and the reflector layer is located between two-layer encapsulation glued membrane after the subassembly is laminated, has isolated external steam, has avoided by the erosion of steam, has improved the reliability of subassembly.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

Fig. 1 is a schematic structural diagram of an embodiment of a packaging adhesive film provided by the present invention;

fig. 2 is a schematic structural view of another embodiment of a packaging adhesive film according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a photovoltaic module according to an embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

As shown in fig. 1-3, fig. 1 is a schematic structural diagram of an embodiment of a packaging adhesive film according to an embodiment of the present invention; fig. 2 is a schematic structural view of another embodiment of a packaging adhesive film according to an embodiment of the present invention; fig. 3 is a schematic structural diagram of a photovoltaic module according to an embodiment of the present invention.

In a specific embodiment, the utility model provides a packaging adhesive film, including rete 1, stratum basale 2 and the reflector layer 3 that from the bottom up set gradually, reflector layer 3 sets up the battery piece clearance of stratum basale 2, reflector layer 3 includes reflective structure for will arrive at the light reflection in battery piece clearance the battery piece district 4 of stratum basale 2.

Through combining reflector layer 3 with current rete 1, shine the sunshine reflection to the battery piece through reflector layer 3 that sets up in the battery clearance, realize that the subassembly utilizes the sunshine in battery piece clearance, and reflector layer 3 is located between two-layer encapsulation glued membrane after the lamination of subassembly, has completely cut off external steam, has avoided by the erosion of steam, has improved the reliability of subassembly.

The utility model discloses in do not do the restriction to the material and the thickness of stratum basale 2, stratum basale 2 can be one of PVDF stratum basale 2, PVF stratum basale 2 or PE stratum basale 2, perhaps other stratum basale 2, stratum basale 2's effect lies in as bearing reflection of light layer 3.

The utility model discloses thickness and shape to reflector layer 3 do not do the restriction, the thickness of reflector layer generally is 50nm ~ 100 nm.

Preferably, the cross section of the triangular prism is an isosceles triangle, the vertex angle of the isosceles triangle is 100-120 degrees, and the base angle is 30-40 degrees.

The utility model is not limited to the triangular prism structure, but the structure is simpler, the production process is simple, especially the structure of the interface isosceles triangle is adopted,

the cross section of the triangular prism is isosceles triangle, so that light is reflected to two sides uniformly in the light reflecting process, light receiving of the battery piece is uniform, the temperature and the generated energy difference of each part of the assembly are small, and the stability of power generation of the assembly and the operation reliability of the assembly are improved.

Preferably, the thickness of the base layer 2 is 35 μm to 50 μm.

In one embodiment, the present invention provides a method for manufacturing a packaging adhesive film, including:

step 1, manufacturing a plurality of triangular prism structures on a substrate layer 2, wherein the top surfaces and the bottom surfaces of the triangular prism structures are vertical to the surface of the substrate layer 2;

step 2, coating a reflective layer on the side surface of the triangular prism to be used as a reflective surface, and forming a sawtooth-shaped reflective layer 3;

step 3, placing the sawtooth-shaped light reflecting layer 3 on a roller;

and step 4, paving the adhesive film layer 1, moving the roller wheel on the adhesive film according to a preset position, transferring the serrated reflective layer 3 to a position where the adhesive film layer 1 corresponds to the gap of the battery piece, reflecting the sunlight irradiating the gap of the battery piece to the battery piece through a glass cover plate, and combining the substrate layer 2 of the serrated reflective layer 3 with the adhesive film layer 1 to form a packaging adhesive film.

Similarly, the utility model discloses do not restrict to the material of reflector layer, the reflector layer can be for the aluminium reflector layer, also can be for aluminium oxide reflector layer 3, perhaps other reflector layers 3.

In addition, the embodiment of the utility model provides a photovoltaic module is still provided, including lower glued membrane layer 20, battery piece layer 22 and the rubberizing rete 10 that from the bottom up set gradually, lower glued membrane layer is as above the encapsulation glued membrane 20 that encapsulation glued membrane manufacturing method made, battery piece layer 22 sets up the battery piece district that the battery piece clearance 21 of encapsulation glued membrane surrounds.

Adopt the utility model provides a packaging adhesive film that packaging adhesive film manufacturing method made, under fixed subassembly receiving optical area, utilize preparation microcosmic reflective structure on the packaging adhesive film to reflect the battery again to subassembly piece interval, cluster interval received light, increased subassembly effective light receiving area, solved the problem that subassembly effective light utilized the area to hang down.

By adopting the local light reflecting structure, sunlight in the gaps of the battery pieces is absorbed, so that the back panel in the corresponding area is prevented from light absorption, the back panel between the string spacing and the piece spacing is further protected, and the assembly failure caused by the aging of the back panel is avoided.

The light reflecting structure can be pressed on adhesive films such as EVA/POE/PVB and the like to form packaging adhesive with a local light reflecting structure, and can be applied to a single-sided assembly and a double-sided assembly like a conventional adhesive film.

The utility model discloses in shift the preparation of reflector layer to glue the membrane end by the subassembly end, solved the problem that subassembly end pad pasting machine development cost is high, the technology is complicated, the yield is low on the one hand, on the other hand reflective structure through subassembly lamination process after-fixing between two-layer glued membrane, fine isolated steam to the corruption of reflector layer, need not to introduce other hot melt adhesives simultaneously, simple process, the cost of manufacture is lower.

Therefore, the utility model discloses do not restrict to the type of battery piece, battery piece in the battery piece layer can be single face battery piece, also can be two-sided battery piece.

The corresponding component is changed by only using the back plate at the bottom of the large-face battery piece and using the cover plate glass for the double-face battery piece.

In one embodiment, as a single-sided assembly, the back plate 30, the lower adhesive film layer 20, the upper adhesive film layer 10 and the glass layer 40 are sequentially arranged from bottom to top, and the lower adhesive film layer 20 includes the light-reflecting layers 21 arranged in the cell gaps and the cell layers 22 arranged between the light-reflecting layers.

To sum up, the embodiment of the utility model provides a encapsulation glued membrane and photovoltaic module through combining reflector layer and current glued membrane layer, reflects the battery piece through the sunshine that will shine in the reflector layer in battery clearance, realizes that the subassembly utilizes the sunshine in battery piece clearance, and the reflector layer is located between two-layer encapsulation glued membrane after the lamination of subassembly, has isolated external steam, has avoided by the erosion of steam, has improved the reliability of subassembly.

The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. The utility model provides a packaging adhesive film, its characterized in that includes rete, stratum basale and the reflector layer that from the bottom up set gradually, the reflector layer sets up the battery piece clearance on stratum basale, the reflector layer includes reflection of light structure for will arrive at the light reflection in battery piece clearance the battery piece district on stratum basale.

2. The packaging adhesive film of claim 1, wherein the substrate layer is a PVDF substrate layer, a PVF substrate layer, or a PE substrate layer.

3. The adhesive packaging film of claim 2, wherein the thickness of the light-reflecting layer is 50nm to 100 nm.

4. The packaging adhesive film of claim 3, wherein the light-reflecting structure of the light-reflecting layer is an inverted triangular prism structure or a pyramid structure.

5. The packaging adhesive film as claimed in claim 4, wherein the light reflecting structure of the light reflecting layer is an inverted triangular prism structure, the cross section of the inverted triangular prism structure is an isosceles triangle, the top angle of the isosceles triangle is 100-120 °, and the bottom angle is 30-40 °.

6. The adhesive packaging film according to claim 5, wherein the thickness of the base layer is 35 μm to 50 μm.

7. The adhesive packaging film of claim 6, wherein the light-reflecting layer is an aluminum light-reflecting layer or an aluminum oxide light-reflecting layer.

8. A photovoltaic module, comprising a lower adhesive film layer, a battery sheet layer and an upper adhesive film layer which are sequentially arranged from bottom to top, wherein the lower adhesive film layer is the packaging adhesive film according to any one of claims 1 to 7, and the battery sheet layer is arranged in a battery sheet area surrounded by a battery sheet gap of the packaging adhesive film.

9. The photovoltaic module according to claim 8, wherein the cell sheet in the cell sheet layer is a single-sided cell sheet or a double-sided cell sheet.