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CN-122002913-A - Curved photovoltaic tile and photovoltaic module

CN122002913ACN 122002913 ACN122002913 ACN 122002913ACN-122002913-A

Abstract

The application discloses a curved photovoltaic tile and a photovoltaic module. The curved photovoltaic tile comprises a panel, a plurality of battery pieces, welding strips and a back plate, wherein the battery pieces are distributed along at least one direction, the welding strips are connected with two adjacent battery pieces along a first direction, the welding strips are formed with first welding spots and second welding spots which are welded with the battery pieces, the first welding spots are positioned at two ends of the battery pieces, the area of each first welding spot is larger than or equal to 1.56mm 2 , the second welding spots are positioned between the first welding spots, the area of each second welding spot is larger than or equal to 1.44mm 2 , the battery pieces are positioned between the panel and the back plate, and the panel, the battery pieces and the back plate are in a curved surface shape. So, the welding strip can realize a plurality of battery piece electricity and be connected, through the area of increase first solder joint and second solder joint, can increase the welding area of welding strip and battery piece, improve the structural strength of solder joint for improve the welding strength of battery piece and welding strip when not increasing the internal resistance, thereby reduce the solder joint and become invalid and lead to battery piece and the risk of welding strip unwelding.

Inventors

  • ZHANG MINHUAN
  • YU HUAJUN
  • ZHU YANJUN
  • HAN YINGJIE

Assignees

  • 深圳市华宝新能源股份有限公司

Dates

Publication Date
20260508
Application Date
20241106

Claims (10)

  1. 1. A curved photovoltaic tile, comprising: A panel; The plurality of battery pieces are arranged along at least one direction; The welding strip is used for connecting two adjacent battery pieces along a first direction, a first welding point and a second welding point are formed on the welding strip, the first welding point is positioned at two ends of the battery pieces, the area of the first welding point is larger than or equal to 1.56mm 2 , the second welding point is positioned between the first welding points, and the area of the second welding point is larger than or equal to 1.44mm 2 ; The battery piece is positioned between the panel and the backboard, and the panel, the battery piece and the backboard are in a curved surface shape.
  2. 2. The curved photovoltaic tile of claim 1, wherein the first solder joint has dimensions greater than or equal to 1.2mm x 1.3mm.
  3. 3. The curved photovoltaic tile of claim 1, wherein the second solder joint has dimensions greater than or equal to 1.2mm x 1.2mm.
  4. 4. The curved photovoltaic tile of claim 1, wherein the first solder joint has a thickness T1,20 μm ∈t1 ∈30 μm.
  5. 5. The curved photovoltaic tile of claim 1, wherein the second solder joint has a thickness T2,20 μm ∈t2 ∈30 μm.
  6. 6. The curved photovoltaic tile of claim 1, wherein the raw material forming the solder joint comprises a silver paste having a silver content of 80% -100%.
  7. 7. The curved photovoltaic tile of claim 1, wherein said plurality of solder strips is a plurality, said plurality of solder strips being spaced apart along a second direction, said second direction intersecting said first direction.
  8. 8. The curved photovoltaic tile of claim 1, wherein said solder strip is flat.
  9. 9. The curved photovoltaic tile of claim 1, further comprising a layer of encapsulation adhesive film disposed between the backsheet and the cell and/or between the panel and the cell.
  10. 10. A photovoltaic module comprising a plurality of the curved photovoltaic tiles of any of claims 1-9, the plurality of curved photovoltaic tiles being electrically connected.

Description

Curved photovoltaic tile and photovoltaic module Technical Field The invention relates to the technical field of photovoltaics, in particular to a curved photovoltaic tile and a photovoltaic module. Background Along with the remarkable problems of energy shortage, climate emission and the like, the world is increasingly concerned with clean and pollution-free renewable energy sources, and solar energy is an inexhaustible green energy source. Currently, the application field of photovoltaic power generation is wide, solar energy and building integrated design (BIPV) gradually becomes trend, and a residential roof is a main application area of distributed photovoltaic. In general, a photovoltaic tile is composed of a plurality of photovoltaic cell strings, wherein the photovoltaic cell strings are connected by a plurality of cells through solder strips, however, in the process of manufacturing the curved photovoltaic tile, certain deformation exists at each position of the cells, so that a desoldering phenomenon is easy to occur between the cells and the solder strips. Disclosure of Invention The invention provides a curved photovoltaic tile and a photovoltaic module. The curved photovoltaic tile comprises a panel, a plurality of battery pieces, welding strips and a back plate, wherein the battery pieces are distributed along at least one direction, the welding strips are connected with two adjacent battery pieces along a first direction, the welding strips are formed with first welding spots and second welding spots which are welded with the battery pieces, the first welding spots are positioned at two ends of the battery pieces, the area of each first welding spot is larger than or equal to 1.56mm 2, the second welding spots are positioned between the first welding spots, the area of each second welding spot is larger than or equal to 1.44mm 2, the battery pieces are positioned between the panel and the back plate, and the panel, the battery pieces and the back plate are in a curved surface shape. In the curved photovoltaic tile of the embodiment of the application, the welding strip can realize the electric connection of a plurality of battery pieces, the welding area of the welding strip and the battery pieces can be increased by increasing the areas of the first welding spot and the second welding spot, and the structural strength of the welding spot is improved, so that the welding strength of the battery pieces and the welding strip is improved while the internal resistance is not increased, and the risk of the welding strip and the battery pieces being unwelded due to the failure of the welding spot is reduced. In certain embodiments, the first weld spot has a size greater than or equal to 1.2mm by 1.3mm. In certain embodiments, the second weld spot has a dimension greater than or equal to 1.2mm by 1.2mm. In some embodiments, the first weld has a thickness T1,20 μm≤T1≤30μm. In some embodiments, the second weld has a thickness T2,20 μm≤T2≤30μm. In certain embodiments, the solder joint-forming material comprises a silver paste having a silver content of 80% to 100%. In some embodiments, the number of solder strips is a plurality, the plurality of solder strips being spaced apart along a second direction, the second direction intersecting the first direction. In some embodiments, the solder strip is flat. In certain embodiments, the curved photovoltaic tile further comprises an encapsulation adhesive film layer disposed between the backsheet and the cell and/or between the panel and the cell. The photovoltaic module comprises a plurality of the curved photovoltaic tiles, and the curved photovoltaic tiles are electrically connected. 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 foregoing 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, in which: FIG. 1 is a schematic perspective view of a curved photovoltaic tile according to an embodiment of the present invention; Fig. 2 is a schematic view of a part of the structure of a curved photovoltaic tile according to an embodiment of the present invention; FIG. 3 is a schematic view of width directions of a first pad and a second pad according to an embodiment of the present invention; FIG. 4 is an enlarged schematic view of section I of FIG. 3; FIG. 5 is a schematic view of the thickness direction of the first and second solder joints according to the embodiment of the present invention; fig. 6 is an enlarged schematic view of section II of fig. 5. The reference numerals indicate 100 parts of the curved photovoltaic tile, 10 parts of the battery piece, 20 parts of the welding strip, 21 parts of the first welding spot, 22 part