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CN-122002963-A - Photovoltaic module

CN122002963ACN 122002963 ACN122002963 ACN 122002963ACN-122002963-A

Abstract

The application relates to the field of photovoltaics, and provides a photovoltaic module, which at least can improve the performance of the photovoltaic module and save the preparation cost. The photovoltaic module comprises a plurality of battery pieces and a welding strip, wherein the battery pieces comprise a first battery piece and a second battery piece which are adjacent, the welding strip is positioned on the first battery piece and the second battery piece and is electrically connected with the first battery piece and the second battery piece, the welding strip comprises a conductive part, and the cross-sectional area of the conductive part positioned on the second battery piece is larger than that of the conductive part positioned on the first battery piece.

Inventors

  • PENG YINGYING
  • LI JIANG
  • ZHANG NINGBO

Assignees

  • 晶科能源(海宁)有限公司

Dates

Publication Date
20260508
Application Date
20260402

Claims (12)

  1. 1. A photovoltaic module, comprising: the battery comprises a plurality of battery pieces, wherein the battery pieces comprise adjacent first battery pieces and second battery pieces; The welding strip is positioned on the first battery piece and the second battery piece and is electrically connected with the first battery piece and the second battery piece, the welding strip comprises a conductive part, and the cross-sectional area of the conductive part positioned on the second battery piece is larger than that of the conductive part positioned on the first battery piece.
  2. 2. The photovoltaic assembly of claim 1, wherein the thickness of the conductive portion on the second cell is greater than the thickness of the conductive portion on the first cell and/or the width of the conductive portion on the second cell is greater than the width of the conductive portion on the first cell in a first direction.
  3. 3. The photovoltaic module of claim 1, wherein the first cell has a first region and a second region, the second region is located between the first region and the second cell, the conductive portion located on the first region has a smaller cross-sectional area than the conductive portion located on the second region, and/or, The second battery piece is provided with a third area and a fourth area, the third area is positioned between the fourth area and the first battery piece, and the cross-sectional area of the conductive part positioned on the third area is smaller than the cross-sectional area of the conductive part positioned on the fourth area.
  4. 4. The photovoltaic assembly of claim 1, wherein a cross-sectional area of the solder strip on the first cell is less than or equal to a cross-sectional area of the solder strip on the second cell.
  5. 5. The photovoltaic assembly of claim 4, wherein the cell sheet comprises a first face and a second face, the solder strip being located on the first face of the first cell sheet and the second face of the second cell sheet.
  6. 6. The photovoltaic module according to claim 5, wherein the solder strip further comprises a solder portion surrounding the conductive portion, the first cell has a first region and a second region, the second region is located between the first region and the second cell, a cross-sectional area of the solder portion located on the second region is smaller than a cross-sectional area of the solder portion located on the first region, and/or, The second battery piece is provided with a third area and a fourth area, the third area is positioned between the fourth area and the first battery piece, and the cross-sectional area of the welding part positioned on the fourth area is larger than or equal to the cross-sectional area of the welding part positioned on the third area.
  7. 7. The photovoltaic module of claim 4, wherein the solder strip further comprises a solder portion surrounding the conductive portion, the battery tab comprises a first face and a second face, the solder strip is located on the second face of the first battery tab, and the solder portion on the first battery tab has a cross-sectional area that is smaller than a cross-sectional area of the solder portion on the second battery tab.
  8. 8. The photovoltaic module of claim 7, wherein the first cell has a first region and a second region, the second region is located between the first region and the second cell, a cross-sectional area of the weld located on the second region is greater than a cross-sectional area of the weld located on the first region, and/or, The second battery piece is provided with a third area and a fourth area, the third area is positioned between the fourth area and the first battery piece, and the cross-sectional area of the welding part positioned on the fourth area is larger than the cross-sectional area of the welding part positioned on the third area.
  9. 9. The photovoltaic module according to claim 1, wherein the first cell includes a first main grid extending in a second direction, and a first bifurcated structure and a second bifurcated structure at both ends of the first main grid, the solder strip is electrically connected to the first main grid, the second bifurcated structure is disposed adjacent to the second cell, and in the second direction, a length of the second bifurcated structure is smaller than a length of the first bifurcated structure, and/or, The second battery piece comprises a second main grid extending along the second direction, and a third bifurcation structure and a fourth bifurcation structure which are positioned at two ends of the second main grid, wherein the welding strip is electrically connected with the second main grid, the third bifurcation structure is arranged adjacent to the first battery piece, and in the second direction, the length of the third bifurcation structure is smaller than that of the fourth bifurcation structure.
  10. 10. The photovoltaic module according to any one of claims 1 to 9, characterized in that the photovoltaic module comprises: a plurality of battery strings including a plurality of the battery pieces, the plurality of battery strings including a first battery string and a second battery string; The bus bar extends along a first direction and is electrically connected with the first battery string and the second battery string, the bus bar positioned on one side of the first battery string comprises a first portion and a second portion which are arranged along the first direction, the second portion is adjacent to the second battery string and comprises a conductive layer, and the cross-sectional area of the conductive layer of the second portion is larger than that of the conductive layer of the first portion.
  11. 11. The photovoltaic module of claim 10, wherein the bus bar is spaced from the cell string along a second direction, the conductive layer of the second portion having a thickness greater than a thickness of the conductive layer of the first portion, wherein the second direction intersects the first direction.
  12. 12. The photovoltaic module of claim 10, wherein the bus bar is located on the cell string, and wherein the width of the conductive layer of the second portion is greater than the width of the conductive layer of the first portion in a second direction, wherein the second direction intersects the first direction.

Description

Photovoltaic module Technical Field The application relates to the field of photovoltaics, in particular to a photovoltaic module. Background With the progressive exhaustion of fossil energy, solar energy is increasingly used as a new energy alternative. 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. Photovoltaic modules are important devices for converting solar energy into electrical energy. How to improve the performance of the photovoltaic module is a problem which needs to be solved at present. Disclosure of Invention The application provides a photovoltaic module, which can at least improve the performance of the photovoltaic module and save the preparation cost. The application provides a photovoltaic module. The photovoltaic module comprises a plurality of battery pieces and a welding strip, wherein the battery pieces comprise a first battery piece and a second battery piece which are adjacent, the welding strip is positioned on the first battery piece and the second battery piece and is electrically connected with the first battery piece and the second battery piece, the welding strip comprises a conductive part, and the cross section area of the conductive part positioned on the second battery piece is larger than that of the conductive part positioned on the first battery piece. Optionally, the thickness of the conductive portion on the second battery piece is greater than the thickness of the conductive portion on the first battery piece, and/or the width of the conductive portion on the second battery piece is greater than the width of the conductive portion on the first battery piece in the first direction. Optionally, the first cell has a first region and a second region, the second region is located between the first region and the second cell, a cross-sectional area of the conductive portion located on the first region is smaller than a cross-sectional area of the conductive portion located on the second region, and/or the second cell has a third region and a fourth region, the third region is located between the fourth region and the first cell, and a cross-sectional area of the conductive portion located on the third region is smaller than a cross-sectional area of the conductive portion located on the fourth region. Optionally, a cross-sectional area of the solder strip on the first battery piece is less than or equal to a cross-sectional area of the solder strip on the second battery piece. Optionally, the battery piece includes a first face and a second face, and the welding strip is located on the first face of the first battery piece and the second face of the second battery piece. Optionally, the welding strip further comprises a welding part wrapping the conductive part, the first battery piece is provided with a first area and a second area, the second area is positioned between the first area and the second battery piece, the cross-sectional area of the welding part positioned on the second area is smaller than the cross-sectional area of the welding part positioned on the first area, and/or the second battery piece is provided with a third area and a fourth area, the third area is positioned between the fourth area and the first battery piece, and the cross-sectional area of the welding part positioned on the fourth area is larger than or equal to the cross-sectional area of the welding part positioned on the third area. Optionally, the welding strip further includes a welding portion wrapping the conductive portion, the battery piece includes a first face and a second face, the welding strip is located on the second face of the first battery piece, and on the second face of the second battery piece, and a cross-sectional area of the welding portion located on the first battery piece is smaller than a cross-sectional area of the welding portion located on the second battery piece. Optionally, the first battery piece has a first region and a second region, the second region is located between the first region and the second battery piece, a cross-sectional area of the welded portion located on the second region is larger than a cross-sectional area of the welded portion located on the first region, and/or the second battery piece has a third region and a fourth region, the third region is located between the fourth region and the first battery piece, and a cross-sectional area of the welded portion located on the fourth region is larger than a cross-sectional area of the welded portion located on the third region. Optionally, the first battery piece comprises a first main grid extending along a second direction, a first bifurcation structure and a second bifurcation structure, wherein the first bifurcation structure and the second bifurcation structure are p