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CN-122028521-A - Photovoltaic module

CN122028521ACN 122028521 ACN122028521 ACN 122028521ACN-122028521-A

Abstract

The invention relates to the field of photovoltaics, and provides a photovoltaic module, which comprises a plurality of battery strings, wherein the battery strings comprise a plurality of battery pieces which are arranged along a first direction, each battery piece comprises a first grid line and a second grid line, the battery piece closest to the adjacent battery string in the two adjacent battery strings along the first direction is a first edge battery piece, the first conductive layer comprises a first connecting part which extends along the first direction and is arranged at intervals along a second direction, one end of the first conductive layer is electrically connected with the first grid line of one of the two adjacent battery pieces in the same battery string, the other end of the first conductive layer is electrically connected with the second grid line of the other of the two adjacent battery pieces, and the second conductive layer comprises a second connecting part which extends along the first direction and is arranged at intervals along the second direction, and is electrically connected with the first grid line or the second grid line of the two adjacent first edge battery pieces, so that the performance of the photovoltaic module can be improved.

Inventors

  • Qin Niannian
  • TAO WUSONG

Assignees

  • 晶科能源(海宁)有限公司

Dates

Publication Date
20260512
Application Date
20260414

Claims (13)

  1. 1. A photovoltaic module, comprising: The plurality of battery strings comprise a plurality of battery pieces which are arranged along a first direction, wherein each battery piece comprises a first grid line and a second grid line, the battery piece closest to the adjacent battery pieces in the two adjacent battery strings along the first direction is a first edge battery piece, the first conductive layer comprises first connecting parts which extend along the first direction and are arranged at intervals along the second direction, one end of each first connecting part is electrically connected with the first grid line of one of the two adjacent battery pieces in the same battery string, the other end of each first connecting part is electrically connected with the second grid line of the other of the two adjacent battery pieces, and the battery string further comprises a second conductive layer which comprises second connecting parts which extend along the first direction and are arranged at intervals along the second direction, and each second connecting part is electrically connected with the first grid line or the second grid line of the two adjacent first edge battery pieces.
  2. 2. The photovoltaic module of claim 1, wherein the first conductive layer further comprises a first current sharing portion extending along the second direction and electrically connected to the plurality of first connection portions.
  3. 3. The photovoltaic module of claim 2, wherein the first current sharing portion has the same contact area as the different first connection portion.
  4. 4. The photovoltaic module of claim 2, wherein the first connection portion and the first current sharing portion are of unitary construction.
  5. 5. The photovoltaic module of claim 1, wherein the thickness of the first conductive layer and/or the second conductive layer is 0.03mm to 0.15mm.
  6. 6. The photovoltaic assembly of claim 1, wherein the cell further comprises: the first auxiliary grids and the second auxiliary grids are alternately arranged along the second direction, a plurality of the first auxiliary grids are electrically connected with the first grid line, and a plurality of the second auxiliary grids are electrically connected with the second grid line; The isolation layer covers the surfaces of the first auxiliary grid and the second auxiliary grid, and the surfaces of the first grid line and the second grid line are exposed.
  7. 7. The photovoltaic module of claim 6, wherein the spacer layer has a thickness of 0.04mm to 0.5mm.
  8. 8. The photovoltaic assembly of claim 1, wherein the cell of the cell string furthest from the first edge cell is a second edge cell, the cell string further comprising: The third conductive layer comprises third connecting parts which extend along a first direction and are distributed at intervals along a second direction, one end of each third connecting part is electrically connected with a first grid line or a second grid line of each second edge battery piece, the other end of each third connecting part protrudes out of each second edge battery piece, the third connecting part of one of two adjacent second edge battery pieces along the second direction is electrically connected with the first grid line, and the third connecting part of the other third connecting part is electrically connected with the second grid line.
  9. 9. The photovoltaic module of claim 8, wherein the cell strings at the second directional ends are edge cell strings, the cell strings between the edge cell strings are center cell strings, the photovoltaic module further comprising: A first bus bar electrically connected with the second connection parts on two adjacent first edge battery pieces in an edge battery string; a second bus bar electrically connected with the third connection parts on two second edge battery pieces adjacent in the second direction; and the third bus bar is electrically connected with the second connecting parts on the adjacent four first edge battery pieces in the adjacent two central battery strings.
  10. 10. The photovoltaic module of claim 9, wherein the second conductive layer further comprises a second current sharing portion electrically connected to the plurality of second connection portions arranged at intervals along the second direction, the first bus bar covers the second current sharing portion, and/or the third bus bar covers the second current sharing portion.
  11. 11. The photovoltaic module according to claim 9, wherein a width of the second connection portion facing the first bus bar is larger than a width of the second connection portion offset from the first bus bar and/or a width of the second connection portion facing the third bus bar is larger than a width of the second connection portion offset from the third bus bar in the second direction.
  12. 12. The photovoltaic module of claim 9, wherein the cell string comprises a first side and a second side opposite to each other, the second bus bar and the third conductive layer are located on the second side, and the third connection portion is folded over to a surface of the second bus bar away from the cell string and is electrically connected with the second bus bar.
  13. 13. The photovoltaic assembly of claim 1, wherein the first conductive layer and/or the second conductive layer is copper foil.

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 performance of which can be improved. The photovoltaic module comprises a plurality of battery strings, a first conductive layer and a second conductive layer, wherein the battery strings are arranged along a first direction, the battery strings comprise a first grid line and a second grid line, the battery pieces closest to the adjacent battery strings in the two adjacent battery strings along the first direction are first edge battery pieces, the first conductive layer comprises first connecting parts which extend along the first direction and are arranged at intervals along a second direction, one end of each first connecting part is electrically connected with the first grid line of one of the two adjacent battery pieces in the same battery string, the other end of each first connecting part is electrically connected with the second grid line of the other of the two adjacent battery pieces, and the second conductive layer comprises second connecting parts which extend along the first direction and are arranged at intervals along the second direction and are electrically connected with the first grid lines or the second grid lines of the two adjacent first edge battery pieces. Optionally, the first conductive layer further comprises a first current equalizing part, and the first current equalizing part extends along the second direction and is electrically connected with the plurality of first connecting parts. Optionally, the contact area of the first current equalizing portion and the contact area of the different first connecting portions are the same. Optionally, the first connection portion and the first current equalizing portion are of an integrated structure. Optionally, the thickness of the first conductive layer and/or the second conductive layer is 0.03 mm-0.15 mm. Optionally, the battery piece further comprises a first auxiliary grid and a second auxiliary grid which are alternately arranged along a second direction, a plurality of first auxiliary grids are electrically connected with the first grid line, a plurality of second auxiliary grids are electrically connected with the second grid line, and an isolation layer covers the surfaces of the first auxiliary grid and the second auxiliary grid and exposes the surfaces of the first grid line and the second grid line. Optionally, the thickness of the isolation layer is 0.04 mm-0.5 mm. Optionally, the battery piece at one side of the battery string farthest from the first edge battery piece is a second edge battery piece, the battery string further comprises a third conductive layer, the third conductive layer comprises third connecting parts which extend along a first direction and are distributed at intervals along a second direction, one end of each third connecting part is electrically connected with a first grid line or a second grid line of the second edge battery piece, the other end of each third connecting part protrudes out of the second edge battery piece, the third connecting part of one of two adjacent second edge battery pieces along the second direction is electrically connected with the first grid line, and the third connecting part of the other third connecting part is electrically connected with the second grid line. Optionally, the battery strings located at the end parts in the second direction are edge battery strings, the battery strings located between the edge battery strings are central battery strings, the photovoltaic module further comprises first bus bars electrically connected with the second connection parts located on two adjacent first edge battery pieces in the edge battery strings, second bus bars electrically connected with the third connection parts located on two adjacent second edge battery pieces in the second direction, and third bus bars electrically connected with the second connection parts located on four adjacent first edge battery pieces in the two adjacent central battery strings. Optionally, the second c