阅读说明：本技术 光伏组件用封装胶膜和具有其的光伏组件 (Photovoltaic module is with encapsulation glued membrane and have its photovoltaic module ) 是由 林金汉 陈玲 施瑕玉 林俊良 于 2020-08-13 设计创作，主要内容包括：本发明公开了一种光伏组件用封装胶膜和具有其的光伏组件,光伏组件用封装胶膜包括：至少一层封装胶膜,所述封装胶膜包括中心区和位于所述中心区外侧的外边缘区,所述外边缘区经过预固化处理而成。本发明实施例的光伏组件用封装胶膜能改善因光伏组件边缘部偏薄而带来的边角外观老化脱层问题。(The invention discloses a packaging adhesive film for a photovoltaic module and the photovoltaic module with the packaging adhesive film, wherein the packaging adhesive film for the photovoltaic module comprises: the packaging film comprises a central area and an outer edge area positioned on the outer side of the central area, and the outer edge area is formed by pre-curing. The packaging adhesive film for the photovoltaic module can solve the problem of corner appearance aging and delamination caused by the fact that the edge part of the photovoltaic module is thin.)

1. The utility model provides a photovoltaic module is with encapsulation glued membrane which characterized in that includes:

the packaging film comprises a central area and an outer edge area positioned on the outer side of the central area, and the outer edge area is formed by pre-curing.

2. The encapsulant film for photovoltaic module as claimed in claim 1, wherein the outer edge region is formed as an annular region surrounding and contiguous with the central region.

3. The encapsulant film for photovoltaic module as claimed in claim 2, wherein the encapsulant film is formed in a plate-like shape, and the width of the outer edge region is not less than 10 mm.

4. The packaging adhesive film for the photovoltaic module as claimed in claim 1, wherein the packaging adhesive film is one layer and added with an ultraviolet curing agent and/or a thermal curing agent, and the curing manner adopted by the outer edge region is ultraviolet curing and/or thermal curing.

5. The encapsulant film as claimed in claim 1, wherein the number of the encapsulant film is two, one of the encapsulant films has an ultraviolet curing agent and/or a thermal curing agent added therein, and the other of the encapsulant films has an ultraviolet curing agent added therein.

6. The encapsulant film as claimed in claim 1, wherein the degree of cross-linking of the corresponding outer edge region of the encapsulant film is 50-75%.

7. The packaging adhesive film for photovoltaic modules as claimed in claim 1, wherein the packaging adhesive film is a transparent or translucent member, and the thickness of the packaging adhesive film is 100-1000 um.

8. The encapsulant film as claimed in claim 1, wherein the base material of the encapsulant film is an electrically insulating resin having a volume resistivity of more than 10¹⁵Omega, cm, the range of the hot melting point is 40-180 ℃.

9. The encapsulant film for photovoltaic module as claimed in claim 8, wherein the electrically insulating resin is at least one material selected from polyolefin, ethylene-vinyl acetate copolymer, polyvinyl butyral, ionomer, polyurethane, silicone, epoxy resin, and ethylene propylene diene monomer.

10. A photovoltaic module comprising the encapsulant film for photovoltaic module as claimed in claims 1 to 9.

Technical Field

The invention belongs to the technical field of photovoltaic products, and particularly relates to a packaging adhesive film for a photovoltaic module and the photovoltaic module with the packaging adhesive film.

Background

Photovoltaic modules are important devices for converting solar energy into electrical energy using the photovoltaic effect. In the current society, the contradiction between the environment and energy is increasingly prominent, and among all new energy sources, solar energy has the characteristics of large reserves, renewability, environmental friendliness and the like, so that photovoltaic power generation becomes an important new energy development direction, and is favored by governments and organizations of various countries.

However, in practical applications, the service time of the photovoltaic module increases continuously along with the extension of outdoor service time, and the four corners of the photovoltaic module are subjected to bubble and delamination, the head and tail bus bar regions are delaminated, the long edges are delaminated along the edges of the battery pieces, and the like. The problem that the power is sharply reduced due to the black edges of the battery pieces at the edges and the like also occurs in the laboratory aging test. The exposure of the problems is related to the fact that the edge part pressure is large and the edge glue layer is thin in the laminating process of the photovoltaic module, and in order to solve the problem, each module manufacturer adopts the lamination with the frame or the corner protector, so that the problem that the edge part of the module is thin can be solved to a certain extent, but the lamination with the frame or the corner protector increases the steps of the production process, not only increases the labor cost, but also has complicated operation and influences the productivity.

In addition, in the laminating process, the incompletely cured packaging glue overflows and does not backfill to cause the problem of air bubbles or glue shortage at the edge of the assembly, and if the problem of glue overflow exists, the edge needs to be cut or the edge sealing adhesive tape needs to be used for processing, so that the cost is increased, the operation is complicated, and the productivity is influenced.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art.

In view of the above, the present invention provides an encapsulant film for a photovoltaic module, which can improve the corner appearance aging delamination problem caused by the edge portion of the photovoltaic module being too thin.

The invention further provides a photovoltaic module which is complete in structure, high in erosion resistance and long in service life.

The packaging adhesive film for the photovoltaic module according to the embodiment of the first aspect of the invention: the packaging film comprises a central area and an outer edge area positioned on the outer side of the central area, and the outer edge area is formed by pre-curing.

According to the packaging adhesive film for the photovoltaic module, the edge is subjected to pre-curing treatment through more than one layer of packaging adhesive film, in the pre-curing process, the problem of air bubbles or adhesive shortage at the edge of the photovoltaic module caused by extrusion and backfilling of packaging adhesive which is not completely cured in the laminating process can be prevented, and the adhesive overflow is effectively prevented, so that the cost caused by edge cutting or edge sealing adhesive tape utilization can be reduced, a cross-linked net-shaped structure is formed after pre-curing, the plasticity is high, the deformation is not easy to generate, the problem of thin edge of the photovoltaic module is effectively solved, the problem of aging and delamination of an outer edge area caused by thin edge of the photovoltaic module is further solved, the process is simple, the operation is convenient, the labor cost is saved, and the yield and the.

The packaging adhesive film for the photovoltaic module according to the embodiment of the invention can also have the following additional technical characteristics:

according to one embodiment of the invention, the outer edge zone is formed as an annular region surrounding and bordering the central zone.

According to one embodiment of the present invention, the packaging adhesive film is formed into a plate-shaped member, and the width of the outer edge region is not less than 10 mm.

According to one embodiment of the invention, the number of the packaging adhesive films is one layer, an ultraviolet curing agent and/or a thermal curing agent are added, and the curing mode adopted by the outer edge area is ultraviolet curing and/or thermal curing.

According to one embodiment of the invention, the number of the packaging adhesive films is two, wherein an ultraviolet curing agent and/or a thermal curing agent is added into one packaging adhesive film, and an ultraviolet curing agent is added into the other packaging adhesive film.

According to one embodiment of the invention, the degree of crosslinking of the corresponding outer edge area of the packaging adhesive film is 50% -75%.

According to one embodiment of the invention, the packaging adhesive film is a transparent or semitransparent piece, and the thickness of the packaging adhesive film is 100-1000 um.

According to one embodiment of the invention, the base material of the packaging adhesive film is an electrically insulating resin with volume resistivity more than 10¹⁵Omega, cm, the range of the hot melting point is 40-180 ℃.

According to an embodiment of the present invention, the electrical insulating resin is at least one material selected from the group consisting of polyolefin, ethylene-vinyl acetate copolymer, polyvinyl butyral, ionomer, polyurethane, silicone, epoxy, and ethylene propylene diene monomer.

The photovoltaic module according to the second aspect of the present invention includes the encapsulant film for photovoltaic module described in any one of the above embodiments.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is a schematic view of a layer of adhesive film of the encapsulant film for photovoltaic module according to the present invention;

FIG. 2 is a pre-curing apparatus of a packaging adhesive film for a photovoltaic module according to the present invention;

fig. 3 is a structural view of a dual glass photovoltaic module according to the present invention.

Reference numerals:

a dual-glass photovoltaic assembly 100;

a packaging adhesive film 10;

a central region 11;

an outer edge region 12;

a glass plate 20;

a battery string 30;

a pre-curing device 40;

an ultraviolet light bar 41.

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 accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention. Furthermore, 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 otherwise specified.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

First, the encapsulant film for photovoltaic modules according to the embodiment of the present invention will be described in detail.

As shown in fig. 1: the packaging adhesive film for the photovoltaic module comprises: at least one layer of packaging film 10.

Specifically, the packaging adhesive film 10 includes a central area 11 and an outer edge area 12 located outside the central area 11, and the outer edge area 12 is formed by pre-curing.

In other words, the encapsulant film for photovoltaic module according to the embodiment of the invention mainly comprises more than one layer of encapsulant film 10, the encapsulant film 10 comprises a central region 11 and an outer edge region 12, the outer edge region 12 is located outside the central region 11, and the outer edge region 12 needs to be pre-cured.

It should be noted that, when the packaging adhesive film 10 is a single layer, the outer edge region 12 of the packaging adhesive film 10 is directly pre-cured, and when the packaging adhesive film 10 is two or more layers, the outer edge region 12 of the packaging adhesive film 10 after being compounded is pre-cured after completing the interlayer compounding of the multiple layers, and the method of interlayer compounding between the multiple layers of adhesive films is understood and easy to implement by those skilled in the art, and therefore, will not be described in detail.

Therefore, according to the packaging adhesive film for the photovoltaic module provided by the embodiment of the invention, the edge pre-curing treatment is carried out through more than one layer of packaging adhesive film 10, in the pre-curing process, the problem of air bubbles or adhesive shortage at the edge of the photovoltaic module caused by extrusion and no backfilling of the packaging adhesive which is not completely cured in the laminating process can be prevented, and the adhesive overflow is effectively prevented, so that the cost caused by edge cutting or edge sealing adhesive tape use can be reduced, a cross-linked net-shaped structure is formed after the pre-curing, the plasticity is high, the deformation is not easy to generate, the problem of thin edge of the photovoltaic module is effectively improved, the problem of aging and delamination of the edge area caused by thin edge of the photovoltaic module is further improved, the process is simple, the operation is convenient.

According to an embodiment of the present invention, the outer edge region 12 is formed as an annular region surrounding the central region 11 and meeting the central region 11, thereby securing the appearance and stability of the photovoltaic module.

In one embodiment of the present invention, the packaging adhesive film 10 is formed as a plate-shaped member, and the width of the outer edge region 12 is not less than 10 mm. The outer edge region 12 with the width not less than 10mm is arranged for pre-curing, so that the problem of edge region aging and delamination caused by the thinness of the edge of the photovoltaic module can be effectively solved.

As shown in fig. 2, the packaging adhesive film 10 is formed in a rectangular shape, the pre-curing device 40 can be configured as a box body matching the shape of the packaging adhesive film 10, and the four sides of the bottom of the box body are provided with ultraviolet light bars 41, and pre-curing is performed by irradiation of the ultraviolet light bars 41.

Optionally, the number of the packaging adhesive film 10 is one layer, and a uv curing agent and/or a thermal curing agent is added, and the curing manner adopted by the outer edge region 12 is uv curing and/or thermal curing.

Preferably, the number of the packaging adhesive films 10 is two, wherein one packaging adhesive film 10 is added with an ultraviolet curing and/or thermosetting curing agent, and the other packaging adhesive film 10 is added with an ultraviolet curing agent. During the subsequent curing of the central area 11 of the packaging adhesive film 10, an ultraviolet curing agent or a thermal curing agent is added into the packaging adhesive film 10, so that the curing time can be effectively shortened, and the curing efficiency can be improved.

It should be noted that, the package adhesive film 10 is first pre-cured in the outer edge region 12, and the pre-curing manner adopted in the outer edge region 12 is ultraviolet curing and/or thermal curing. When the edge region 12 is pre-cured by using two curing methods, i.e., uv curing and thermal curing, the curing methods may be performed first and then thermal curing, or thermal curing and then uv curing, or thermal curing and uv curing may be performed simultaneously.

The central area 11 is cured in the subsequent steps, curing agents are added into the packaging adhesive films 10 before curing, ultraviolet curing agents and/or thermosetting curing agents are added into the packaging adhesive films 10 when the packaging adhesive films 10 are one layer, ultraviolet curing agents and/or thermosetting curing agents are added into one packaging adhesive film 10 when the packaging adhesive films 10 are two layers, ultraviolet curing agents are added into the other packaging adhesive film 10, and the ultraviolet curing agents and the thermosetting curing agents are added in no sequence.

According to one embodiment of the present invention, the degree of cross-linking of the outer edge region 12 of the packaging adhesive film 10 is 50% -75%. The packaging adhesive film 10 with the crosslinking degree of 50% -75% can ensure the thickness retentivity of the adhesive film and the adhesion with the back plate glass, and the adhesion performance of an interface cannot be influenced.

In one embodiment of the present invention, the packaging adhesive film 10 is a transparent or translucent member, and the thickness of the packaging adhesive film 10 is 100um-1000 um. The packaging adhesive film 10 is transparent or semitransparent, namely, the packaging adhesive film can transmit light, the thickness of the packaging adhesive film 10 is 100-1000 um, the lamination thickness is effectively controlled through establishment of the thickness, and the uniformity of the lamination thickness is guaranteed, so that the yield and the efficiency of packaging the packaging adhesive film for the whole photovoltaic module are improved.

According to one embodiment of the present invention, the base material of the packaging adhesive film 10 is an electrically insulating resin with a volume resistivity greater than 10¹⁵Omega, cm, the range of the hot melting point is 40-180 ℃. The electric insulation resin is adopted as the packaging adhesive film matrix, has good water resistance, low water vapor transmittance and large volume resistivity, and canThe safety and the long-term aging resistance of the battery assembly in the high-temperature and high-humidity environment are ensured, so that the service life of the photovoltaic assembly can be prolonged, the packaging adhesive film 10 subjected to hot melting treatment can be operated by a simple device and equipment, the preparation process is optimized when the hot melting point is in the range of 40-180 ℃, and the preparation efficiency is improved.

Further, the electrical insulating resin is at least one material selected from polyolefin, ethylene-vinyl acetate copolymer, polyvinyl butyral, ionomer, polyurethane, silica gel, epoxy resin and ethylene propylene diene monomer. The material has good weather resistance and ultraviolet aging resistance, excellent heat resistance and low temperature resistance, and the service life of the photovoltaic module is prolonged.

The photovoltaic module comprises the packaging adhesive film for the photovoltaic module.

The packaging adhesive film for the photovoltaic module has the technical effects, so that the photovoltaic module has the corresponding technical effects, namely the photovoltaic module has the advantages of complete structure, high anti-corrosion capability, long service life and the like.

The following describes in detail the encapsulant film for photovoltaic module and the photovoltaic module having the same according to the embodiment of the present invention with reference to specific embodiments.