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CN-224218757-U - Solar cell and photovoltaic module

CN224218757UCN 224218757 UCN224218757 UCN 224218757UCN-224218757-U

Abstract

The application discloses a solar cell and a photovoltaic module, wherein the solar cell comprises a cell body, a plurality of first fine grids and second fine grids which extend along a second direction and are alternately arranged on the surface of the cell body along a first direction, a plurality of electric combination parts are arranged on the surface of the cell body, each group of electric combination parts comprises a group of collinear first electric combination parts and a group of collinear second electric combination parts, each group of electric combination parts is provided with a first central line, a first group of electric combination parts are arranged close to the edge of the cell body, a vertical distance D between the first central line of each first group of electric combination parts and the edge of the adjacent cell body is equal to or more than 0.03, and the width W of the cell body along the first direction is equal to or less than 0.09. Thus, the D/W is arranged in a reasonable range, so that the electric joint is at a certain distance from the edge of the battery body, the electric joint is prevented from being too close to the edge of the battery body, and the risk of hidden cracking during welding in the subsequent process is reduced while the current collection in the fine grid is met.

Inventors

  • YU LONG
  • LIU QINGPING
  • TONG HONGBO
  • JIN YUPENG
  • LI ZHENGUO

Assignees

  • 隆基绿能科技股份有限公司西咸新区分公司

Dates

Publication Date
20260508
Application Date
20250508

Claims (13)

  1. 1. The solar cell is characterized by comprising a cell body, wherein the surface of the cell body is provided with a plurality of first fine grids and a plurality of second fine grids which extend along a second direction and are alternately arranged at intervals along a first direction, and the first direction is intersected with the second direction; The surface of the battery body is provided with a plurality of electric combination parts, and each electric combination part comprises a first electric combination part electrically connected with at least one first fine grid and a second electric combination part electrically connected with at least one second fine grid; The electrical bonding portions are in a plurality of groups, each group of electrical bonding portions comprising a plurality of first electrical bonding portions that are collinear along the first direction and a plurality of second electrical bonding portions that are collinear along the first direction; Each group of electric combination parts is provided with a first central line along the second direction, the plurality of groups of electric combination parts comprise a first group of electric combination parts which are arranged close to the edges of the battery body, the vertical distance between the first central line of the first group of electric combination parts and the adjacent edges of the battery body is D, and the width of the battery body along the second direction is W, so that the requirement that D/W is more than or equal to 0.03 and less than or equal to 0.09 is met.
  2. 2. The solar cell according to claim 1, wherein a spacing between the first center lines of adjacent two sets of electrical junctions is S, satisfying 0.8≤S/D≤2.
  3. 3. The solar cell according to claim 1, wherein in each set of electrical junctions, one set of the first electrical junctions is collinear with a first straight line and one set of the second electrical junctions is collinear with a second straight line, and wherein in the second direction, a spacing between the first straight line and the second straight line in each set of electrical junctions is T, satisfying 2≤D/T≤14.
  4. 4. The solar cell according to claim 1, wherein a distance between the first center lines of two adjacent groups of electric junctions is S, one group of the first electric junctions is collinear with a first straight line and one group of the second electric junctions is collinear with a second straight line in each group of the electric junctions along the first direction, a distance between the first straight line and the second straight line in each group of the electric junctions is T, and a ratio of D to T to S is in a range of 2:1:1.6 to 14:1:28.
  5. 5. The solar cell according to claim 1, further comprising an edge connection electrode electrically connected to the first fine grid or the second fine grid near an edge position of the cell body in the first direction.
  6. 6. The solar cell according to claim 1, wherein the first fine grid is disconnected from the second electrical connection portion to form a plurality of first sub fine grids, and each first sub fine grid is provided with a first electrical connection portion; the first sub-fine grid comprises a first end and a second end which are opposite along the second direction, and the distance from the first end to the corresponding first electric joint is unequal to the distance from the second end to the corresponding first electric joint; And/or the second fine grid is disconnected at a position corresponding to the first electric combination part to form a plurality of second sub fine grids, the second sub fine grids comprise a third end and a fourth end which are opposite along the second direction, and the distance from the third end to the corresponding second electric combination part is unequal to the distance from the fourth end to the corresponding second electric combination part.
  7. 7. The solar cell according to claim 4, wherein the solar cell meets at least one of the following conditions: A. The vertical distance D between the first central line of the first group of electric joints and the adjacent edge of the battery body is 7mm < D <15mm; B. The distance T between the first straight line and the second straight line in each group of electric combination parts is more than or equal to 0.8mm and less than or equal to 4mm; C. The width W of the battery body along the second direction is 160mm or more and 260mm or less.
  8. 8. The solar cell of claim 1, wherein a plurality of the first fine grids and a plurality of the second fine grids are disposed at equal intervals along the first direction.
  9. 9. The solar cell of any one of claims 1-8, further comprising a first conductive member electrically connected to a plurality of the first electrical bonds in the same set of electrical bonds and a second conductive member electrically connected to a plurality of the second electrical bonds in the same set of electrical bonds.
  10. 10. The solar cell of any one of claims 1-8, wherein a width of the first electrical bond is greater than a width of a portion of the first fine grid other than the first electrical bond along the first direction; And/or, along the first direction, the width of the second electric bonding part is larger than the width of the part of the second fine grid except the second electric bonding part.
  11. 11. The solar cell of claim 9, further comprising a first insulator disposed between the first fine grid and the second conductive element; and/or the solar cell further comprises a second insulating piece, wherein the second insulating piece is arranged between the second fine grid and the first conductive piece.
  12. 12. A photovoltaic module comprising an interconnect and a string of cells, the string of cells being formed by electrical connection of the solar cells of any one of claims 1-11, the interconnect being electrically connected to the electrical junction.
  13. 13. The photovoltaic module according to claim 12, wherein 0, 1, or 2 sets of the electrical junctions are provided between the interconnects electrically connecting adjacent two of the solar cells along different arrangement directions of the cell strings.

Description

Solar cell and photovoltaic module Technical Field The application belongs to the technical field of solar cells, and particularly relates to a solar cell and a photovoltaic module. Background The back contact cell (Back Contact Solar Cell) is a specially designed solar cell, and is mainly characterized in that a conductive circuit and a contact point of the cell are arranged on the back surface, so that the light transmittance and the photoelectric conversion efficiency are improved. In the related art, the edge welding position in the solar cell is closer to the edge of the cell, so that hidden cracking hidden danger is easy to generate due to the fact that the edge of the cell is close to the subsequent welding. Disclosure of utility model The application aims to provide a solar cell and a photovoltaic module, which can solve the problem that hidden cracks are easy to generate due to the fact that the edge welding position of the solar cell is close to the edge of the cell in the related technology, and the subsequent welding is close to the edge of the cell. In order to solve the technical problems, the application is realized as follows: According to the embodiment of the application, a solar cell is provided, the solar cell comprises a cell body, a plurality of first thin grids and a plurality of second thin grids are arranged on the surface of the cell body, the first thin grids and the second thin grids extend along a second direction and are alternately arranged at intervals along the first direction, the first direction is intersected with the second direction, a plurality of electric combination parts are arranged on the surface of the cell body, each electric combination part comprises a first electric combination part electrically connected with at least one first thin grid and a second electric combination part electrically connected with at least one second thin grid, the electric combination parts are in multiple groups, each electric combination part comprises a plurality of first electric combination parts and a plurality of second electric combination parts, the first electric combination parts and the second electric combination parts are collinear along the first direction, each electric combination part is provided with a first central line along the second direction, each electric combination part comprises a plurality of first electric combination parts arranged close to the edge of the cell body, the width W of the first electric combination parts and the edge of the cell body is equal to or less than or equal to 0.09, and the width W of the adjacent cell body is equal to or less than or equal to 0.03. Optionally, the spacing between the first central lines of the two adjacent groups of electric joints is S, and S/D is more than or equal to 0.8 and less than or equal to 2. Optionally, in the first direction, in each group of electric combination parts, one group of the first electric combination parts are collinear with a first straight line, one group of the second electric combination parts are collinear with a second straight line, and in the second direction, the distance between the first straight line and the second straight line in each group of electric combination parts is T, so that D/T is more than or equal to 2 and less than or equal to 14. The distance between the first central lines of two adjacent groups of electric joint parts is S, in the first direction, in each group of electric joint parts, one group of the first electric joint parts are collinear with a first straight line, one group of the second electric joint parts are collinear with a second straight line, in the second direction, the distance between the first straight line and the second straight line in each group of electric joint parts is T, and the ratio range of D to T to S is 2:1:1.6-14:1:28. Optionally, the solar cell further includes an edge connection electrode electrically connected to the first fine grid or the second fine grid near an edge position of the cell body in the first direction. Optionally, the first fine grid is disconnected from the position corresponding to the second electric bonding part to form a plurality of first sub fine grids, and each first sub fine grid is provided with a first electric bonding part; the first sub-fine grid comprises a first end and a second end which are opposite along the second direction, and the distance from the first end to the corresponding first electric joint is unequal to the distance from the second end to the corresponding first electric joint; And/or the second fine grid is disconnected at a position corresponding to the first electric combination part to form a plurality of second sub fine grids, the second sub fine grids comprise a third end and a fourth end which are opposite along the second direction, and the distance from the third end to the corresponding second electric combination part is unequal to the distance from the fourth end to