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CN-122002912-A - Photovoltaic module's glued membrane, photovoltaic module and photovoltaic system

CN122002912ACN 122002912 ACN122002912 ACN 122002912ACN-122002912-A

Abstract

The invention relates to the technical field of photovoltaics, and discloses a glue film of a photovoltaic module, the photovoltaic module and a photovoltaic system. The photovoltaic module comprises a plurality of battery strings, and adjacent battery strings are at least partially overlapped and form a first step structure. One side of the adhesive film facing the battery strings is provided with battery string areas corresponding to the battery strings one by one, a second step structure is formed between the adjacent battery string areas, the battery string areas form concave-convex structures on the adhesive film, and the second step structure is embedded with the corresponding first step structure. When the adhesive film is arranged on the front or back of the battery strings, the concave-convex structure formed by the battery string areas on the adhesive film can fill the suspension area formed by the battery strings due to overlapping. In the lamination process of the photovoltaic module, the adhesive film can play a role of a supporting pad on the suspension area of the battery string, so that the problem of stress concentration caused by suspension is solved, the risk of hidden cracking of the battery piece in the lamination process is reduced, and the molding quality and reliability of the photovoltaic module are improved.

Inventors

  • XIONG JIANHAI
  • WANG GANG
  • WANG YONGQIAN

Assignees

  • 山东爱旭太阳能科技有限公司
  • 珠海富山爱旭太阳能科技有限公司
  • 广东爱旭科技有限公司
  • 天津爱旭太阳能科技有限公司
  • 浙江爱旭太阳能科技有限公司

Dates

Publication Date
20260508
Application Date
20260203

Claims (13)

  1. 1. The adhesive film of the photovoltaic module is characterized in that the photovoltaic module comprises a plurality of battery strings (10) which are sequentially arranged along a first direction, and the adjacent battery strings (10) are at least partially overlapped and form a first step structure (101); One side of the adhesive film, which faces the battery strings (10), is provided with battery string areas (1) corresponding to a plurality of battery strings (10) one by one, a second step structure (2) is formed between the adjacent battery string areas (1), the plurality of battery string areas (1) form concave-convex structures on the adhesive film, and the second step structure (2) is embedded with the corresponding first step structure (101).
  2. 2. The adhesive film of a photovoltaic module according to claim 1, characterized in that the second step structure (2) maintains a first preset gap with the first step structure (101) in the first direction.
  3. 3. The adhesive film of the photovoltaic module according to claim 2, wherein the dimension of the first preset gap in the first direction is H, and the value range of H is 0.1 mm-10 mm.
  4. 4. The film of a photovoltaic module according to claim 1, characterized in that the film has a thickness dimension in a third direction, the thickness of the film gradually increasing or gradually decreasing in the first direction within the string region (1).
  5. 5. The adhesive film of a photovoltaic module according to claim 1, characterized in that a plurality of the cell string regions (1) comprise first concave regions (11) and first convex regions (12) which are staggered in sequence along the first direction, wherein one of the cell strings (10) is positioned in the first concave region (11) and the other cell string (10) is positioned in the first convex region (12) and extends to at least partially the first concave region (11) in two adjacent cell strings (10).
  6. 6. The film of any one of claims 1-5, wherein the string (10) comprises a plurality of cells (100) arranged in sequence along a second direction, adjacent cells (100) at least partially overlapping and forming a third step structure; The adhesive film is provided with battery piece areas corresponding to a plurality of battery pieces (100) of the battery string (10) one by one in the battery string area (1), a fourth step structure is formed between the adjacent battery piece areas, and the fourth step structure is embedded with the third step structure; the second direction is perpendicular to the first direction.
  7. 7. The photovoltaic module adhesive film of claim 6, wherein the fourth step structure and the third step structure maintain a second predetermined gap in the second direction.
  8. 8. The film of photovoltaic module of claim 6, wherein the film has a thickness dimension in the third direction, the film thickness increasing or decreasing gradually in the second direction in the cell region.
  9. 9. The adhesive film of a photovoltaic module according to claim 6, wherein the plurality of cell sheet regions include a second concave region and a second convex region which are sequentially staggered along the second direction, wherein one of the two adjacent cell sheets (100) is located in the second concave region, and the other cell sheet (100) is located in the second convex region and extends at least partially to the second concave region.
  10. 10. A photovoltaic module, characterized by comprising a battery string (10), a front adhesive film (20) and a back adhesive film (30), wherein the front adhesive film (20) is arranged on the front surface of the battery string (10), the back adhesive film (30) is arranged on the back surface of the battery string (10), and the front adhesive film (20) and/or the back adhesive film (30) adopt the adhesive film of the photovoltaic module according to any one of claims 1-9.
  11. 11. The photovoltaic module according to claim 10, characterized in that the front adhesive film (20) and the back adhesive film (30) each employ an adhesive film of the photovoltaic module according to any one of claims 1 to 9; In the first direction, the thickness variation trend of the battery string region (1) of the front adhesive film (20) is opposite to the thickness variation trend of the battery string region (1) of the back adhesive film (30) corresponding to the same battery string (10).
  12. 12. The photovoltaic module according to claim 10, characterized in that the front adhesive film (20) and the back adhesive film (30) each employ an adhesive film of the photovoltaic module according to any one of claims 1 to 9; The battery string areas (1) comprise first concave areas (11) and first convex areas (12) which are distributed in a staggered mode in sequence along the first direction, the first concave areas (11) on the front adhesive film (20) are opposite to the first convex areas (12) on the back adhesive film (30), and the first convex areas (12) on the front adhesive film (20) are opposite to the first concave areas (11) on the back adhesive film (30).
  13. 13. A photovoltaic system comprising a photovoltaic module according to any one of claims 9-12.

Description

Photovoltaic module's glued membrane, photovoltaic module and photovoltaic system Technical Field The invention relates to the technical field of photovoltaics, in particular to a glue film of a photovoltaic module, the photovoltaic module and a photovoltaic system. Background The photovoltaic module generally comprises a battery string, a front adhesive film, a back adhesive film, a front plate and a back plate, wherein the front plate, the front adhesive film, the battery string, the back adhesive film and the back plate are sequentially stacked, and then are compounded into an integral structure through a lamination process. At present, the battery strings of the photovoltaic module mainly comprise two typesetting modes, wherein the first typesetting mode is a spacing arrangement mode, a plurality of battery strings are sequentially arranged along a certain direction, and a certain gap is reserved between every two adjacent battery strings. However, in the typesetting mode, due to the fact that unused gaps exist among the battery strings, the effective light receiving area of the assembly is reduced, and the utilization rate of the panel surface area is low. The second mode is an overlapping arrangement mode, adjacent battery strings are arranged in a partially overlapping mode, so that gaps among the battery strings are reduced or eliminated, and the surface area of the board is fully utilized. However, in the typesetting mode, the thickness of the battery strings in the overlapping area is overlapped, so that the height difference is easy to form between the overlapping area and the non-overlapping area, further a suspension area is generated, and in the lamination process, stress concentration is easy to occur in the suspension area due to uneven compression, so that the risk of hidden cracking of the battery piece is obviously increased, and the long-term reliability and the power generation performance of the photovoltaic module are affected. Therefore, there is a need for a photovoltaic module adhesive film, a photovoltaic module and a photovoltaic system to solve the above problems. Disclosure of Invention Based on the problems, the invention aims to provide a glue film of a photovoltaic module, the photovoltaic module and a photovoltaic system, which can improve the panel area utilization rate of the photovoltaic module, reduce the hidden cracking risk during lamination, improve the molding quality and reliability of the photovoltaic module and improve the power generation performance of the photovoltaic system. In order to achieve the above purpose, the invention adopts the following technical scheme: In a first aspect, a film of a photovoltaic module is provided, the photovoltaic module includes a plurality of battery strings sequentially arranged along a first direction, adjacent battery strings at least partially overlap, and a first step structure is formed; One side of the adhesive film, which faces the battery strings, is provided with a plurality of battery string areas corresponding to the battery strings one by one, a second step structure is formed between the adjacent battery string areas, the battery string areas form concave-convex undulating structures on the adhesive film, and the second step structure is embedded with the corresponding first step structure. As an alternative to the adhesive film of the photovoltaic module of the present invention, the second step structure and the first step structure maintain a first preset gap in the first direction. As an alternative scheme of the adhesive film of the photovoltaic module, the dimension of the first preset gap in the first direction is H, and the value range of H is more than or equal to 0.1mm and less than or equal to 10mm. As an alternative to the adhesive film of the photovoltaic module of the present invention, the dimension of the adhesive film in the third direction is a thickness dimension, and in the cell string region, the thickness of the adhesive film gradually increases or gradually decreases along the first direction. As an alternative scheme of the adhesive film of the photovoltaic module, the plurality of battery string regions comprise first concave regions and first convex regions which are sequentially distributed in a staggered manner along the first direction, one of the two adjacent battery strings is positioned in the first concave region, and the other battery string is positioned in the first convex region and extends to the first concave region at least partially. As an alternative scheme of the adhesive film of the photovoltaic module, the battery string comprises a plurality of battery pieces which are sequentially arranged along the second direction, and the adjacent battery pieces are at least partially overlapped and form a third step structure; the adhesive film is provided with battery piece areas corresponding to a plurality of battery pieces of the battery strings one by one in the battery stri