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CN-121985630-A - Photovoltaic module, preparation method thereof and manufacturing equipment of photovoltaic module

CN121985630ACN 121985630 ACN121985630 ACN 121985630ACN-121985630-A

Abstract

The application relates to the technical field of photovoltaics, in particular to a photovoltaic module and a preparation method thereof, and manufacturing equipment of the photovoltaic module, wherein the photovoltaic module comprises a back contact battery piece, an insulating strip, a conductive piece and an electric connecting piece, the back contact battery piece comprises a first surface, a fine grid extending along a first direction is arranged on the first surface, the insulating strip is distributed on the first surface at intervals along the first direction, the insulating strips cover part of the structure of the fine grid, at least part of the structure of the conductive piece is located at a gap between adjacent insulating strips, the conductive piece is electrically connected with the fine grid, the electrical connection piece comprises a first connection part and second connection parts connected to two ends of the first connection part along a first direction, the two second connection parts are respectively overlapped on the two adjacent insulating strips, and the first connection part is electrically connected with the conductive piece. The quality and the reliability of the photovoltaic module are improved through the design, meanwhile, the preparation difficulty of the photovoltaic module is reduced, and the preparation efficiency of the photovoltaic module is improved.

Inventors

  • ZHANG ZHIXUN
  • TAO WUSONG
  • YANG XUBING

Assignees

  • 晶科能源(海宁)有限公司

Dates

Publication Date
20260505
Application Date
20260407

Claims (20)

  1. 1. A photovoltaic module, comprising: a back contact battery piece comprising a first surface provided with a fine grid extending along a first direction; Insulating strips, wherein the insulating strips are arranged on the first surface at intervals along the first direction, and the insulating strips cover part of the structure of the fine grid; the conductive piece is positioned at a gap between adjacent insulating strips, and is electrically connected with the fine grid; The electric connecting piece comprises a first connecting part and second connecting parts connected to two ends of the first connecting part along the first direction, the two second connecting parts are respectively lapped on the two adjacent insulating strips, and the first connecting parts are electrically connected with the conductive pieces.
  2. 2. The photovoltaic module of claim 1, wherein the fine grid comprises a first portion and a second portion, the first portion and the second portion are electrically connected, the conductive member is electrically connected with the first portion, and an insulating adhesive is disposed on the first surface, and the insulating adhesive covers the second portion; the insulating glue is located on one side of the insulating strip, facing the first surface, along a second direction, a part of structures of the insulating glue are covered by the insulating strip, and the second direction intersects with the first direction.
  3. 3. The photovoltaic module of claim 1, wherein the first connection portion includes a protrusion extending in the second direction toward the first surface, the protrusion being located within the void and electrically connected to the conductive member.
  4. 4. The photovoltaic module according to claim 3, wherein the width of the protruding portion is W1, W1 satisfies 0.5 mm≤W1≤1.5 mm, and/or the width of the void is W2, W2 satisfies 0.5 mm≤W2≤2 mm.
  5. 5. The photovoltaic module of claim 3, wherein the width of the protrusions is greater than or equal to the width of the conductive members.
  6. 6. The photovoltaic assembly of claim 3, wherein the height of the protrusions is less than or equal to the height of the conductive members.
  7. 7. A photovoltaic module according to claim 3, wherein the first surface is further provided with an insulating glue, the insulating glue being located on a side of the insulating strip facing the first surface in the second direction, a part of the structure of the insulating glue being covered by the insulating strip; The sum of the height of the conductive piece and the height of the protruding part is H1, and the sum of the height of the insulating strip and the height of the insulating glue is H2, wherein H1 is more than or equal to H2.
  8. 8. The photovoltaic assembly of claim 2, wherein the first connection is located on a side of the insulating strip away from the first surface along the second direction; the sum of the height of the insulating strip and the height of the insulating glue is H2, and the height of the conductive piece is H1, wherein H1 is more than or equal to H2.
  9. 9. The photovoltaic module of any of claims 1 to 8, wherein the photovoltaic module comprises a string of cells; The battery strings comprise a plurality of back contact battery pieces which are arranged along a third direction, and the adjacent back contact battery pieces are electrically connected through the electric connecting piece; The insulating strips are continuously arranged along the third direction, and adjacent back contact battery pieces are fixedly connected through the insulating strips; the third direction intersects the first direction.
  10. 10. The photovoltaic module of claim 9, wherein a plurality of the insulating strips are integrally formed or adjacent insulating strips are fixedly connected.
  11. 11. The photovoltaic module of any of claims 1 to 8, wherein the photovoltaic module comprises a string of cells; The battery strings comprise a plurality of back contact battery pieces which are arranged along a third direction, and the adjacent back contact battery pieces are electrically connected through the electric connecting piece; At least two insulating strips are arranged at intervals along the third direction, and each insulating strip is fixedly connected with at least two adjacent back contact battery pieces.
  12. 12. The photovoltaic assembly of any of claims 1 to 8, wherein the insulating strip comprises an insulating layer and a bonding layer, the bonding layer being located on both sides of the insulating layer in a second direction; the bonding layer on one side of the insulating layer is fixedly connected with the electric connecting piece, and the bonding layer on the other side of the insulating layer is fixedly connected with the back contact battery piece.
  13. 13. The photovoltaic module of any of claims 1 to 8, wherein the electrical connector has a width W3 and a thickness D3, wherein 16+.w3/d3+.300.
  14. 14. The photovoltaic assembly of claim 13, wherein the electrical connector is a metal foil or solder strip; The width of the electric connecting piece is W3, W3 is more than or equal to 3mm and less than or equal to 6mm, and/or the thickness of the electric connecting piece is D3, and D3 is more than or equal to 20 mu m and less than or equal to 180 mu m.
  15. 15. The photovoltaic module of claim 14, wherein the metal foil comprises a base layer and a contact layer located on one side of the base layer along a second direction, the contact layer being electrically connected to the base layer and the conductive member, respectively.
  16. 16. The photovoltaic module of any of claims 1 to 8, comprising first and second fine grids alternately arranged along a third direction, wherein first portions of the second fine grids alternate with second portions of the first fine grids along the third direction; The electric connecting pieces electrically connected with the first fine grid are first electric connecting pieces, the electric connecting pieces electrically connected with the second fine grid are second electric connecting pieces, and the first electric connecting pieces and the second electric connecting pieces are alternately distributed along the first direction at intervals.
  17. 17. The photovoltaic module of claim 16, wherein a spacing distance between adjacent first and second electrical connectors is L1, L1 satisfying 1mm ∈l1 ∈5mm.
  18. 18. The photovoltaic module according to claim 1, wherein a first fine grid, a second fine grid, a first main grid and a second main grid are disposed on the first surface, the first main grid and the second main grid are alternately arranged along the first direction, the first fine grid and the second fine grid are alternately arranged along a third direction, the first main grid is electrically connected with the first fine grid, and the second main grid is electrically connected with the second fine grid; the first surface is further provided with insulating glue, and the insulating glue is positioned between the first main grid and the second part of the second fine grid and between the second main grid and the second part of the first fine grid along the second direction; the first direction, the second direction and the third direction are intersected in pairs.
  19. 19. A method of manufacturing a photovoltaic module, comprising: Acquiring a back contact battery piece, wherein the back contact battery piece comprises a first surface, and a fine grid extending along a first direction is arranged on the first surface; a conductive piece electrically connected with the fine grid is arranged on the first surface; Laying insulating strips and electric connecting pieces on the first surface, wherein the insulating strips are distributed on the first surface at intervals along the first direction, the insulating strips cover part of structures of the fine grid, at least part of structures of the electric conducting pieces are located at gaps between adjacent insulating strips, the electric connecting pieces comprise first connecting parts and second connecting parts connected to two ends of the first connecting parts, the two second connecting parts are respectively overlapped on the two adjacent insulating strips, and the first connecting parts are electrically connected with the electric conducting pieces; And fixing the insulating strips, the electric connecting piece and the back contact battery piece through a hot pressing process.
  20. 20. A manufacturing apparatus of a photovoltaic module, characterized in that the manufacturing apparatus of a photovoltaic module manufactures a photovoltaic module by the manufacturing method of a photovoltaic module according to claim 19, the manufacturing apparatus of a photovoltaic module comprising: the battery acquisition mechanism is used for acquiring the back contact solar cell; the coating mechanism is used for arranging a conductive piece electrically connected with the fine grid on the first surface; a laying mechanism for laying the insulating strips and the electrical connectors on the first surface; And the hot pressing mechanism is used for fixing the insulating strips, the electric connecting pieces and the back contact battery piece through a hot pressing process.

Description

Photovoltaic module, preparation method thereof and manufacturing equipment of photovoltaic module Technical Field The application relates to the technical field of photovoltaics, in particular to a photovoltaic module, a preparation method thereof and manufacturing equipment of the photovoltaic module. Background The photovoltaic module is used for converting solar energy into electric energy, and the photovoltaic module comprises a back contact battery piece, wherein the back contact battery piece is used for fully arranging grid lines on a backlight surface so as to improve the light utilization rate. At present, the reliability of the photovoltaic module is poor, the problems of short circuit and the like are easy to occur, and the normal use of the photovoltaic module is influenced. Disclosure of Invention In view of the above, the present application provides a photovoltaic module, a method for manufacturing the same, and a device for manufacturing the photovoltaic module, so as to solve the problem of poor reliability of the photovoltaic module in the prior art. The first aspect of the embodiment of the application provides a photovoltaic module, which comprises a back contact battery piece, insulating strips, a conductive piece and an electric connecting piece, wherein the back contact battery piece comprises a first surface, thin grids extending along a first direction are arranged on the first surface, the insulating strips are arranged at intervals along the first direction on the first surface, the insulating strips cover part of structures of the thin grids, at least part of structures of the conductive piece are positioned at gaps between adjacent insulating strips, the conductive piece is electrically connected with the thin grids, the electric connecting piece comprises a first connecting part and second connecting parts connected with two ends of the first connecting part along the first direction, the two second connecting parts are respectively overlapped on the two adjacent insulating strips, and the first connecting parts are electrically connected with the conductive piece. In one possible implementation manner, the fine grid comprises a first portion and a second portion, the first portion is electrically connected with the second portion, the conductive piece is electrically connected with the first portion, insulating glue is arranged on the first surface and covers the second portion, the insulating glue is located on one side of the insulating strip, which faces the first surface, along a second direction, a part of structures of the insulating glue are covered by the insulating strip, and the second direction intersects with the first direction. In one possible embodiment, the first connection portion includes a protrusion extending toward the first surface along the second direction, and the protrusion is located in the gap and is electrically connected to the conductive member. In one possible embodiment, the width of the protrusions is W1, W1 satisfies 0.5 mm≤W1≤1.5 mm, and/or the width of the voids is W2, W2 satisfies 0.5 mm≤W2≤2 mm. In one possible embodiment, the width of the protruding portion is greater than or equal to the width of the conductive member. In one possible embodiment, the height of the protruding portion is less than or equal to the height of the conductive member. In one possible implementation manner, the first surface is further provided with insulating glue, the insulating glue is located on one side of the insulating strip, facing the first surface, along the second direction, a part of structures of the insulating glue are covered by the insulating strip, the sum of the height of the conductive piece and the height of the protruding portion is H1, and the sum of the height of the insulating strip and the height of the insulating glue is H2, wherein H1 is greater than or equal to H2. In one possible implementation manner, the first connecting portion is located on one side, away from the first surface, of the insulating strip along the second direction, the sum of the height of the insulating strip and the height of the insulating glue is H2, and the height of the conductive piece is H1, wherein H1 is greater than or equal to H2. In one possible implementation manner, the photovoltaic module includes a cell string, where the cell string includes a plurality of back contact cells arranged along a third direction, adjacent back contact cells are electrically connected through the electrical connection member, the insulating strips are continuously arranged along the third direction, adjacent back contact cells are fixedly connected through the insulating strips, and the third direction intersects the first direction. In one possible embodiment, a plurality of the insulating strips are integrally formed, or adjacent insulating strips are fixedly connected. In one possible implementation manner, the photovoltaic module includes a battery string, where the