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CN-224218748-U - Photovoltaic module

CN224218748UCN 224218748 UCN224218748 UCN 224218748UCN-224218748-U

Abstract

The utility model relates to the technical field of photovoltaics, provides a photovoltaic module, and aims to solve the problem that side edges, which are close to one end of a jumper bus bar, of a cell sheet arranged by a shingle and are in contact with the jumper bus bar are prone to hidden cracking in a lamination process. The photovoltaic module comprises a battery string and bus bars located on one side of the battery string, the battery string comprises a plurality of battery pieces connected in series, the battery pieces are arranged along the length direction of the battery string, each battery piece is further stacked with the adjacent battery piece along the direction perpendicular to the battery piece, the bus bars extend along the length direction of the battery string, and buffer supporting structures are arranged between the battery pieces and the bus bars. The buffer support structure can reduce stress caused by extrusion of the bus bar of the side edge of the battery piece which is parallel to the bus bar and has the smallest distance when the battery piece is laminated, and reduce the risk of hidden cracking of the side edge.

Inventors

  • HUANG HONGWEI
  • GUO JUNPAN
  • LI ZHIWEI

Assignees

  • 天合光能股份有限公司

Dates

Publication Date
20260508
Application Date
20250509

Claims (20)

  1. 1. The photovoltaic module is characterized by comprising a battery string (1 ') and bus bars positioned on one side of the battery string (1 '), wherein the battery string (1 ') comprises a plurality of battery pieces connected in series, the plurality of battery pieces are arranged along the length direction of the battery string, each battery piece is further laminated with the adjacent battery piece along the direction perpendicular to the battery piece, and the bus bars extend along the length direction of the battery string; And a buffer supporting structure is arranged between the battery piece and the bus bar.
  2. 2. The photovoltaic assembly of claim 1, wherein the buffer support structure comprises a first buffer support structure disposed between a surface of the cell facing the bus bar and the bus bar.
  3. 3. The photovoltaic module according to claim 2, characterized in that the first buffer support structure is arranged such that a certain gap is maintained between the bus bar and a side edge (13) of the cell sheet that is parallel to the bus bar and at a minimum distance.
  4. 4. A photovoltaic module according to claim 2 or 3, wherein the first buffer support structure comprises a first buffer support block (51), the cell sheet comprising a first end remote from the busbar and a second end close to the busbar, the first buffer support block (51) being located close to the first end.
  5. 5. The photovoltaic module according to claim 4, wherein the first buffer support structure further comprises a second buffer support block (52), the second buffer support block (52) being located in a region of the first buffer support block (51) near the second end side.
  6. 6. The photovoltaic module according to claim 5, wherein the number of the second buffer support blocks (52) is plural, and the first buffer support blocks (51) and the plurality of second buffer support blocks (52) are uniformly distributed along the length direction of the cell string.
  7. 7. A photovoltaic module according to claim 2 or 3, characterized in that the first buffer support structure comprises buffer support strips (53), the buffer support strips (53) extending in the length direction of the string and spanning the non-laminated portions of the individual cells.
  8. 8. A photovoltaic module according to any one of claims 1 to 3, characterized in that the buffer support structure comprises a second buffer support structure arranged between the bus bar and a lateral edge (13) of the cell sheet parallel to the bus bar and at a minimum distance.
  9. 9. The photovoltaic module according to claim 8, characterized in that the second buffer support structure comprises a buffer spacer (7) having a first support surface (71), a second support surface (72) and a third support surface (73), the first support surface (71) and the second support surface (72) being connected to each other, the connection area of the first support surface (71) and the second support surface (72) supporting the lateral edge (13), the first support surface (71) and the second support surface (72) supporting respectively the two surfaces of the battery sheet forming the lateral edge (13), the third support surface (73) being supported to the bus bar.
  10. 10. The photovoltaic module according to claim 9, characterized in that the buffer pad (7) also has a fourth support surface (74), the fourth support surface (74) being supported to the surface of the adjacent cell sheet facing the bus bar.
  11. 11. The photovoltaic module according to claim 10, characterized in that the buffer pad has a first portion (751) and a second portion (752) between the area of the third supporting surface (73) facing the fourth supporting surface (74) and the fourth supporting surface (74), the first portion (751) and the second portion (752) being distributed in sequence along the fourth supporting surface (74) towards the third supporting surface (73), the elastic modulus of the first portion (751) being smaller than the elastic modulus of the second portion (752).
  12. 12. A photovoltaic module according to any one of claims 1 to 3, characterized in that adjacent cells in the string (1') are connected in series by means of a solder strip (2), a third buffer support structure being provided between the laminated portions of adjacent cells; The third buffer support structure directly supports the lamination portions of the adjacent battery pieces and/or directly supports the portions of the solder strips (2) located between the lamination portions of the adjacent battery pieces and the lamination portions of the battery pieces.
  13. 13. The photovoltaic module according to claim 12, wherein a fourth buffer support structure is provided at an end face of the cell sheet laminated by the adjacent cell sheet near one end of the bus bar, the fourth buffer support structure being fixedly connected or integrally formed with the third buffer support structure.
  14. 14. The photovoltaic module of claim 13, wherein the third buffer support structure is a buffer glue and/or the fourth buffer support structure is a buffer glue.
  15. 15. A photovoltaic module according to any one of claims 1 to 3, characterized in that the bus bars are located at the gap between two adjacent strings (1 '), the width of the bus bars being greater than the width of the gap, the buffer support structure being provided between the cells of two adjacent strings (1') and the bus bars.
  16. 16. The photovoltaic module according to claim 15, characterized in that two groups of said buffer support structures are arranged between the cells of two adjacent strings (1 ') and the bus bars, one group of said buffer support structures being located between the cells of one string (1 ') and the bus bars and the other group of said buffer support structures being located between the cells of the other string (1 ') and the bus bars; Or a group of buffer supporting structures are arranged between the battery pieces and the bus bars of two adjacent battery strings (1 '), one part of the same buffer supporting structure is positioned between the battery piece and the bus bar of one battery string (1 '), and the other part of the same buffer supporting structure is positioned between the battery piece and the bus bar of the other battery string (1 ').
  17. 17. A photovoltaic module according to any one of claims 1 to 3, characterized in that the bus bar is a jumper bus bar (3).
  18. 18. The photovoltaic module according to claim 17, characterized in that it comprises at least two battery packs, each formed by at least two of said strings (1') connected in parallel, said at least two battery packs being connected in series; The anodes of at least two battery packs are positioned on the same side of the photovoltaic module and are connected in series by means of the jumper bus bar (3), or the battery strings (1') in the battery packs are connected in anti-parallel by means of the jumper bus bar (3) with diodes (8).
  19. 19. The photovoltaic module according to claim 18, characterized in that the battery pack comprises n parallel strings (1'), the cells being split cells (1), the split cells (1) being 1/n whole cells; wherein n is a positive integer of 2 or more.
  20. 20. A photovoltaic module according to claim 2 or 3, wherein the bus bar and the cell are insulated from each other between the surfaces thereof that are opposite to each other.

Description

Photovoltaic module Technical Field The utility model relates to the technical field of photovoltaics, and particularly provides a photovoltaic module. Background With the development of efficient battery technologies (such as Tunnel Oxide Passivated Contact and heteojunction WITH INTRINSIC THIN-layer), requirements on power and efficiency of photovoltaic modules are higher and higher, and multi-slice and cell stack arrangement becomes a mainstream trend in the future. In order to ensure certain voltage, jumper wires are often adopted in circuit design. In order to ensure the uniformity of the size of the photovoltaic module, the jumper wires are generally arranged on the back surface of the battery piece, and in part, the jumper wires are arranged on the front surface of the battery piece and extend along the stacking direction of the battery piece in the form of jumper bus bars. Because the cell stacks the tile setting, form certain contained angle between cell and the wire jumper busbar, be close to the one end of wire jumper busbar at the cell, with wire jumper busbar flat and be close to the side arris of busbar and wire jumper busbar contact, therefore the cell is close to the one end of wire jumper busbar and is the line contact between the wire jumper busbar, the cell is close to the wire jumper busbar one end, will produce great stress (the stress that causes by the extrusion of wire jumper busbar) with the side arris department of wire jumper busbar contact when laminating, cause this side arris of cell to produce hidden crack easily. Accordingly, there is a need in the art for a new solution to the above-mentioned problems. Disclosure of utility model The utility model aims to solve the technical problem that the side edges, which are close to one end of the jumper bus bar and are in contact with the jumper bus bar, of the battery pieces arranged in the overlapping tiles are easy to generate hidden cracks in the lamination process. The utility model provides a photovoltaic module, which comprises a battery string and bus bars positioned at one side of the battery string, wherein the battery string comprises a plurality of battery pieces connected in series, the battery pieces are arranged along the length direction of the battery string, each battery piece is further overlapped with the adjacent battery piece along the direction perpendicular to the battery pieces, the bus bars extend along the length direction of the battery string, and a buffer support structure is arranged between the battery pieces and the bus bars. In the above preferred technical solution of the photovoltaic module, the buffer support structure includes a first buffer support structure, and the first buffer support structure is disposed between a surface of the battery sheet facing the bus bar and the bus bar. In a preferred embodiment of the above photovoltaic module, the first buffer support structure is configured such that a certain gap is maintained between a side edge of the battery sheet, which is parallel to the bus bar and has a minimum distance, and the bus bar. In the above preferred technical solution of the photovoltaic module, the first buffer supporting structure includes a first buffer supporting block, the battery piece includes a first end far away from the bus bar and a second end near the bus bar, and the first buffer supporting block is located near the first end. In the above preferred technical solution of the photovoltaic module, the first buffer supporting structure further includes a second buffer supporting block, and the second buffer supporting block is located in a region of the first buffer supporting block, which is close to the second end side. In the above preferred technical solution of the photovoltaic module, the number of the second buffer support blocks is plural, and the first buffer support blocks and the plurality of second buffer support blocks are uniformly distributed along the length direction of the battery string. In a preferred embodiment of the above photovoltaic module, the first buffer support structure includes a buffer support bar extending in a length direction of the cell string and crossing over the non-laminated portion of the single cell sheet. In the above preferred technical solution of the photovoltaic module, the buffer support structure includes a second buffer support structure, and the second buffer support structure is disposed between a lateral edge of the battery sheet parallel to the bus bar and having a minimum distance with the bus bar. In the preferred technical scheme of the photovoltaic module, the second buffer supporting structure comprises a buffer cushion block (7), the buffer cushion block is provided with a first supporting surface (71), a second supporting surface (72) and a third supporting surface (73), the first supporting surface (71) and the second supporting surface (72) are connected with each other, the connecting area of the first sup