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CN-122028520-A - Photovoltaic module

CN122028520ACN 122028520 ACN122028520 ACN 122028520ACN-122028520-A

Abstract

The disclosure relates to the field of photovoltaics and provides a photovoltaic module which comprises a first battery unit and a second battery unit which are arranged along a first direction, an electric connecting piece, an isolating layer, an encapsulation adhesive film, a cover plate and a cover plate, wherein the electric connecting piece extends along the first direction and is electrically connected with the first battery unit and the second battery unit, the isolating layer is positioned between the electric connecting piece and the first battery unit and between the electric connecting piece and the second battery unit, the isolating layer is provided with a protrusion or a recess, the encapsulation adhesive film covers the first battery unit, the second battery unit, the first bus bar and at least the surfaces of separation layers, and the cover plate is used for covering the surfaces of the encapsulation adhesive film far away from the first battery unit and the second battery unit. The reliability of the photovoltaic module can be improved.

Inventors

  • ZHAO QIUYU
  • ZHANG ZHIXUN
  • YANG XUBING

Assignees

  • 浙江晶科能源有限公司

Dates

Publication Date
20260512
Application Date
20260410

Claims (14)

  1. 1. A photovoltaic module, comprising: a first battery cell and a second battery cell arranged in a first direction; the electric connecting piece extends along the first direction and is electrically connected with the first battery unit and the second battery unit; the isolating layer is positioned between the electric connecting piece and the first battery unit and between the electric connecting piece and the second battery unit, and is provided with a protrusion or a depression; The packaging adhesive film covers the first battery unit, the second battery unit and at least part of the surface of the isolation layer; And the cover plate is used for covering the surfaces of the packaging adhesive film, which are far away from the first battery unit and the second battery unit.
  2. 2. The photovoltaic module of claim 1, wherein the protrusions or depressions on the separator are located on the surface of the separator facing the first and second cells and the surface of the separator facing the electrical connection.
  3. 3. The photovoltaic module of claim 1 or 2, wherein the surface of the separator facing the first and second cells is convex and the surface of the separator facing the electrical connector is concave.
  4. 4. The photovoltaic module of claim 1, wherein the protrusions or recesses on the same side of the separator layer have the same spacing between adjacent protrusions or recesses.
  5. 5. The photovoltaic module according to claim 1 or 4, characterized in that the height of the protrusions on the separator is 2-8 μm and/or the depth of the depressions on the separator is 2-8 μm.
  6. 6. The photovoltaic module according to claim 1 or 4, wherein the arrangement density of the protrusions or depressions on the isolation layer is 50/mm 2 to 100/mm 2.
  7. 7. The photovoltaic module of claim 1, wherein the spacer layer has a width in the second direction that is greater than a width of the electrical connector.
  8. 8. The photovoltaic assembly of claim 1, wherein a length of the separator layer is less than a length of the electrical connector in the first direction.
  9. 9. The photovoltaic assembly of claim 1, wherein the first cell unit comprises opposing first and second sides, the encapsulation film comprising: the first adhesive film layer is positioned on the second sides of the first battery unit and the second battery unit; the second adhesive film layer is positioned between the isolation layer and the first battery unit and between the isolation layer and the second battery unit; the third adhesive film layer is positioned between the isolation layer and the electric connecting piece; and the fourth adhesive film layer is positioned between the electric connecting piece and the cover plate.
  10. 10. The photovoltaic module of claim 9, wherein the thickness of the third adhesive film layer is greater than or equal to the thickness of the second adhesive film layer and/or the thickness of the third adhesive film layer is greater than or equal to the thickness of the fourth adhesive film layer.
  11. 11. The photovoltaic module of claim 10, wherein a ratio of the thickness of the third adhesive film layer to the thickness of the second adhesive film layer is 1:1-3:1, and/or a ratio of the thickness of the third adhesive film layer to the thickness of the fourth adhesive film layer is 1:1-3:1.
  12. 12. The photovoltaic module of claim 10, wherein the thickness of the third adhesive film layer is greater the sum of the thicknesses of the electrical connection and the separator.
  13. 13. The photovoltaic module of claim 9, wherein the separator layer comprises: A substrate layer; The weather-proof layer is positioned between the base material layer and the second adhesive film layer and between the base material layer and the third adhesive film layer.
  14. 14. The photovoltaic module of claim 13, wherein the weatherable layer is doped with at least one of terbium, europium, or cerium.

Description

Photovoltaic module Technical Field The disclosure relates to the field of photovoltaics, and in particular relates to a photovoltaic module. Background The photovoltaic module is a core part in a solar power generation system, the photovoltaic module comprises a plurality of photovoltaic cells which are connected in series or in parallel, the photovoltaic cells can convert light energy into electric energy, and the photovoltaic module collects and outputs the electric energy in the plurality of photovoltaic cells. The photovoltaic module is generally formed by connecting a plurality of photovoltaic cell sheets in series through a welding strip to form a cell string, and then connecting a plurality of cell strings in parallel or in series through bus bars. Meanwhile, in order to solve the problems of circuit continuity and the like in the series-parallel/series connection process of the battery pieces, an electric connector is also introduced into the photovoltaic module for optimizing circuit connection. There is a need to further improve the reliability of photovoltaic modules after the introduction of electrical connectors. Disclosure of Invention The present disclosure provides a photovoltaic module, at least the reliability of which can be improved. The photovoltaic module comprises a first battery unit and a second battery unit which are arranged along a first direction, an electric connecting piece, an isolating layer, an encapsulation adhesive film and a cover plate, wherein the electric connecting piece extends along the first direction and is electrically connected with the first battery unit and the second battery unit, the isolating layer is located between the electric connecting piece and the first battery unit and between the electric connecting piece and the second battery unit, the isolating layer is provided with a protrusion or a depression, the encapsulation adhesive film covers the surfaces of the first battery unit, the second battery unit, the first bus bar and at least part of the isolating layer, and the cover plate is used for covering the surfaces of the encapsulation adhesive film far away from the first battery unit and the second battery unit. Optionally, the protrusions or recesses on the isolation layer are located on the surfaces of the isolation layer facing the first battery unit and the second battery unit and the surfaces of the isolation layer facing the electrical connector. Optionally, the surfaces of the isolating layers facing the first battery unit and the second battery unit are convex, and the surfaces of the isolating layers facing the electric connector are concave. Optionally, the protrusions or recesses on the same side of the isolation layer have the same spacing between two adjacent protrusions or recesses. Optionally, the height of the protrusion on the isolation layer is 2-8 μm, and/or the depth of the depression on the isolation layer is 2-8 μm. Optionally, the arrangement density of the protrusions or the depressions on the isolation layer is 50/mm 2-100/mm 2. Optionally, in the second direction, a width of the isolation layer is greater than a width of the electrical connection. Optionally, the length of the isolation layer is smaller than the length of the electrical connector along the first direction. Optionally, the packaging adhesive film comprises a first adhesive film layer, a second adhesive film layer, a third adhesive film layer and a fourth adhesive film layer, wherein the first adhesive film layer is positioned on the second side of the first battery unit and the second battery unit, the second adhesive film layer is positioned between the isolation layer and the first battery unit and between the isolation layer and the second battery unit, the third adhesive film layer is positioned between the isolation layer and the electric connecting piece, and the fourth adhesive film layer is positioned between the electric connecting piece and the cover plate. Optionally, the thickness of the third adhesive film layer is greater than or equal to the thickness of the second adhesive film layer and/or the thickness of the third adhesive film layer is greater than or equal to the thickness of the fourth adhesive film layer. Optionally, the ratio of the thickness of the third adhesive film layer to the thickness of the second adhesive film layer is 1:1-3:1, and/or the ratio of the thickness of the third adhesive film layer to the thickness of the fourth adhesive film layer is 1:1-3:1. Optionally, the thickness of the third adhesive film layer is larger as the sum of the thicknesses of the electrical connection piece and the isolation layer is larger. Optionally, the isolation layer comprises a substrate layer and a weather-proof layer, wherein the weather-proof layer is positioned between the substrate layer and the second adhesive film layer and between the substrate layer and the third adhesive film layer. Optionally, the weathering layer is doped wi