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CN-121985602-A - Photovoltaic module

CN121985602ACN 121985602 ACN121985602 ACN 121985602ACN-121985602-A

Abstract

The invention relates to the field of photovoltaics and provides a photovoltaic module, which comprises a plurality of battery strings arranged along a first direction, wherein each battery string comprises a plurality of battery pieces arranged along a second direction, two adjacent battery pieces are electrically connected, the battery piece positioned at the end part of the battery string along the second direction is an edge battery piece, the edge battery piece comprises a first doping area and a second doping area, an insulating layer covers the surface of the edge battery piece, a conductive layer covers the surface of the insulating layer, the conductive layer comprises a first part and a second part which are mutually spaced, the first part is electrically connected with the first doping area, the second part is electrically connected with the second doping area, the conductive layer on at least one edge battery piece is electrically connected with the conductive layer on the adjacent edge battery piece, a packaging adhesive film is used for covering the surface of the battery string, and a cover plate is used for covering the surface of the packaging adhesive film far away from the battery string, so that the reliability of the photovoltaic module can be improved.

Inventors

  • HU YUANHONG
  • YANG XUBING

Assignees

  • 晶科能源(海宁)有限公司

Dates

Publication Date
20260505
Application Date
20260407

Claims (14)

  1. 1. A photovoltaic module, comprising: The battery strings arranged along the first direction comprise a plurality of battery pieces arranged along the second direction, wherein two adjacent battery pieces are electrically connected, the battery piece positioned at the end part of the battery string along the second direction is an edge battery piece, the edge battery piece comprises a first doping area and a second doping area, an insulating layer covers the surface of the edge battery piece, a conductive layer covers the surface of the insulating layer, the conductive layer comprises a first part and a second part which are mutually spaced, the first part is electrically connected with the first doping area, the second part is electrically connected with the second doping area, and the conductive layer on at least one edge battery piece is electrically connected with the conductive layer on the adjacent edge battery piece; The packaging adhesive film is used for covering the surface of the battery string; and the cover plate is used for covering the surface, far away from the battery strings, of the packaging adhesive film.
  2. 2. The photovoltaic module according to claim 1, wherein the cell string located at the first direction end is an edge cell string, the conductive layer located on one of the two edge cell pieces of the edge cell string is electrically connected with the conductive layer located on the edge cell piece of the adjacent cell string, and the conductive layer located on the other of the two edge cell pieces is used as an output terminal.
  3. 3. The photovoltaic module according to claim 1 or 2, wherein the first portion includes a first connection portion and a plurality of first protruding portions arranged along the first direction, the first connection portion being electrically connected to the plurality of first protruding portions; The second part comprises a second connecting part and a plurality of second protruding parts which are arranged along the first direction, wherein the second connecting part is electrically connected with the plurality of second protruding parts, the second protruding parts are staggered with the first protruding parts, the second protruding parts are spaced from the first protruding parts, and at least part of the first connecting parts are electrically connected with the second connecting parts on the adjacent edge battery pieces.
  4. 4. A photovoltaic module according to claim 3, wherein the first connection portion has a width of 3mm to 6mm and/or a thickness of 200 μm to 300 μm in the second direction.
  5. 5. The photovoltaic module according to claim 3, wherein the first connecting portion further comprises a first movable portion, which is foldable along the first direction and is electrically connected to the adjacent second connecting portion; The second connecting part further comprises a second movable part, wherein the second movable part can be folded along the first direction and is used for being electrically connected with the adjacent first connecting part.
  6. 6. The photovoltaic module of claim 1, wherein the cell strings are further arranged along the second direction, and further comprising a third conductive layer on two adjacent edge cells along the second direction, the third conductive layer being electrically connected to the two edge cells, respectively.
  7. 7. The photovoltaic module according to claim 2 or 6, wherein the cells located between the edge cells in the cell string are central cells, the central cells include a third doped region and a fourth doped region, the doping type of the third doped region is the same as that of the first doped region, the doping type of the fourth doped region is the same as that of the second doped region, a second insulating layer and a second conductive layer are disposed on the central cells, the second insulating layer covers the central cells, the second conductive layer covers the second insulating layer, the second conductive layer includes a third portion and a fourth portion that are spaced apart from each other, the third portion is electrically connected with the third doped region, the fourth portion is electrically connected with the fourth doped region, and the third portion located on one of the two adjacent central cells is electrically connected with the fourth portion located on the other central cell.
  8. 8. The photovoltaic module according to claim 7, wherein the third portion includes a third connection portion and a plurality of third protruding portions arranged along the first direction, the third connection portion being electrically connected to the plurality of third protruding portions; The fourth part comprises a fourth connecting part and a plurality of fourth protruding parts which are distributed along the first direction, wherein the fourth connecting part is electrically connected with the fourth protruding parts, the third connecting part of one of the two adjacent second conductive layers is at least partially overlapped with the fourth connecting part of the other, the fourth protruding parts and the third protruding parts are distributed in a staggered mode, and the fourth protruding parts and the third protruding parts are spaced.
  9. 9. The photovoltaic module according to claim 8, wherein the width of the third connection portion is 3mm to 5mm and the thickness of the third connection portion is 50 μm to 70 μm along the second direction.
  10. 10. The photovoltaic module of claim 6, wherein the third conductive layer comprises a fifth portion, a sixth portion, and a seventh portion that are spaced apart from each other, the fifth portion being electrically connected to one of the first doped region or the second doped region of one of the edge cells, the sixth portion being electrically connected to the other of the first doped region or the second doped region of one of the edge cells and being electrically connected to the other of the first doped region or the second doped region of the other of the edge cells, the seventh portion being electrically connected to one of the first doped region or the second doped region of the other of the edge cells.
  11. 11. The photovoltaic module according to claim 10, wherein the fifth portion includes a fifth connection portion and a plurality of fifth protruding portions arranged along the first direction, the fifth connection portion being electrically connected to the plurality of fifth protruding portions; the sixth part comprises a sixth connecting part, a plurality of sixth protruding parts and a seventh protruding part, wherein the sixth protruding parts and the seventh protruding parts are arranged along the first direction, the sixth protruding part is positioned at one side of the sixth connecting part facing the fifth part, and the seventh protruding part is positioned at one side of the sixth connecting part facing the seventh part; The seventh part comprises a seventh connecting part and a plurality of eighth protruding parts which are arranged along the first direction, wherein the seventh connecting part is electrically connected with the plurality of eighth protruding parts; The fifth convex parts and the sixth convex parts are arranged in a staggered manner, the fifth convex parts and the sixth convex parts are spaced, the seventh convex parts and the eighth convex parts are arranged in a staggered manner, and the seventh convex parts and the eighth convex parts are spaced.
  12. 12. The photovoltaic module according to claim 11, wherein the cell strings located at the ends of the first direction are edge cell strings, the cell strings located between the edge cell strings are center cell strings, and the sixth connecting portion in the center cell strings further includes a third movable portion that is foldable in the first direction, and adjacent third movable portions are connected to each other.
  13. 13. The photovoltaic assembly of claim 11, wherein the sixth connection portion has a greater width than the fifth connection portion in the second direction.
  14. 14. The photovoltaic module according to claim 11 or 13, wherein the width of the fifth connection portion is 3mm to 5mm, and the width of the sixth connection portion is 14mm to 18mm.

Description

Photovoltaic module Technical Field The disclosure relates to the field of photovoltaics, and in particular relates to a photovoltaic module. Background Currently, with the gradual exhaustion of fossil energy, solar cells are increasingly used as new energy alternatives. A solar cell is a device that converts solar light energy into electrical energy. The solar cell generates carriers by utilizing the photovoltaic principle, and then the carriers are led out by using the electrodes, so that the electric energy can be effectively utilized. The photovoltaic module is a core component of a solar power generation system, light energy is converted into electric energy through serial single solar cells, current bus bar is used for realizing bus bar between battery strings, but bus bar is used for realizing bus bar between the battery strings, so that the problems of complex process and reduced reliability exist. Disclosure of Invention The present disclosure provides a photovoltaic module, at least the reliability of which can be improved. The photovoltaic module comprises a plurality of battery strings arranged along a first direction, wherein each battery string comprises a plurality of battery pieces arranged along a second direction, two adjacent battery pieces are electrically connected, each battery piece located at the end part of each battery string along the second direction is an edge battery piece, each edge battery piece comprises a first doping area and a second doping area, an insulating layer, the insulating layer covers the surface of each edge battery piece, each conductive layer covers the surface of each insulating layer, each conductive layer comprises a first part and a second part which are mutually spaced, each first part is electrically connected with the first doping area, each second part is electrically connected with each second doping area, each conductive layer on each edge battery piece is electrically connected with each conductive layer adhesive film on the adjacent edge battery piece, each packaging adhesive film is used for covering the surface of each battery string, and each cover plate is used for covering the surface of each packaging adhesive film far away from each battery string. Optionally, the battery string located at the end of the first direction is an edge battery string, the conductive layer located on one of the two edge battery pieces in the edge battery string is electrically connected with the conductive layer located on the adjacent edge battery piece in the battery string, and the conductive layer located on the other one of the two edge battery pieces is used as an output end. Optionally, the first part comprises a first connecting part and a plurality of first protruding parts arranged along the first direction, wherein the first connecting part is electrically connected with the plurality of first protruding parts, the second part comprises a second connecting part and a plurality of second protruding parts arranged along the first direction, the second connecting part is electrically connected with the plurality of second protruding parts, the second protruding parts and the first protruding parts are staggered, the second protruding parts and the first protruding parts are spaced, and at least part of the first connecting parts are electrically connected with the first connecting parts on the adjacent edge battery pieces. Optionally, in the second direction, the width of the first connection portion is 3 mm-6 mm, and/or the thickness is 200 μm-300 μm. Optionally, the first connecting part further comprises a first movable part, wherein the first movable part can be folded along the first direction and is used for being electrically connected with the adjacent second connecting part, and the second connecting part further comprises a second movable part, wherein the second movable part can be folded along the first direction and is used for being electrically connected with the adjacent first connecting part. Optionally, the battery strings are further arranged along the second direction, the photovoltaic module further comprises a third conductive layer, the third conductive layer is located on two adjacent edge battery pieces along the second direction, and the third conductive layer is electrically connected with the two edge battery pieces respectively. Optionally, the width of the fifth connecting portion is 3 mm-5 mm, and the width of the sixth connecting portion is 14 mm-18 mm. Optionally, the cell pieces located between the edge cell pieces in the cell string are central cell pieces, the central cell pieces comprise a third doped region and a fourth doped region, the doping types of the third doped region and the first doped region are the same, the doping types of the fourth doped region and the second doped region are the same, a second insulating layer and a second conductive layer are arranged on the central cell pieces, the second insulating