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CN-224205545-U - Welding strip fixing structure, back contact battery string and photovoltaic module

CN224205545UCN 224205545 UCN224205545 UCN 224205545UCN-224205545-U

Abstract

The application relates to a welding strip fixing structure, a back contact battery string and a photovoltaic module. The welding strip fixing structure comprises a battery piece, an adhesive piece and a welding strip, wherein the adhesive piece comprises two adhesive parts, the two adhesive parts are arranged on the battery piece side by side along a first direction, and the welding strip is arranged on the battery piece along a second direction and is arranged between the two adhesive parts so as to fix the welding strip on the battery piece in an adhesive mode. So, the welding strip is covered by two bonding parts on two sides, effectively increases the contact area between the welding strip and the bonding parts, thereby increasing the tension between the bonding parts and the welding strip, realizing the reliable fixation of the welding strip and avoiding the deviation of the welding strip. Moreover, adjust a large amount of glues of single-point into the structural style of micro double bond portion, can effectively reduce the height of bond portion, avoid raising the solder strip, and then avoid the solder strip to appear the condition of cold joint, guarantee the welding quality of solder strip to guarantee the product quality of photovoltaic module, guarantee photovoltaic module's reliability.

Inventors

  • Liu Luolin
  • ZHU JIANG
  • TAN XIAOCHUN

Assignees

  • 通威太阳能（成都）有限公司

Dates

Publication Date
20260505
Application Date
20250604

Claims (10)

  1. 1. A solder strip fixing structure, characterized by comprising: a battery sheet (110); An adhesive member (120) comprising two adhesive sections (121), wherein the two adhesive sections (121) are arranged side by side in the first direction on the battery sheet (110); And the welding strips (130) are arranged on the battery piece (110) along the second direction and are arranged between the two bonding parts (121) so as to bond and fix the welding strips (130) on the battery piece (110).
  2. 2. The solder strip fixing structure according to claim 1, wherein the adhesive portion (121) is a spot adhesive, and the solder strip (130) is disposed between two of the spot adhesives.
  3. 3. The solder strip fixing structure according to claim 2, wherein the diameter dimension of the bonding portion (121) ranges from 0.2mm to 4mm; and/or the height dimension of the bonding part (121) is in the range of 30-200 mu m; And/or the distance between the centers of the two bonding parts (121) is 0.2 mm-4 mm.
  4. 4. The solder strip fixing structure according to claim 2, wherein the size ratio of the bonding portion (121) along the first direction to the second direction is in the range of 1.2-1.8:1; And/or, the coating rate of the bonding parts (121) to the welding strip (130) is more than 80%.
  5. 5. The solder strip fixing structure according to claim 1, wherein the adhesive portion (121) is an adhesive strip extending in the second direction, and the solder strip (130) is interposed between two of the adhesive strips.
  6. 6. The solder strip fixing structure according to claim 5, wherein the size of the adhesive portion (121) in the first direction is 0.2mm to 4mm; And/or the size range of the bonding part (121) along the second direction is 0.2 mm-6 mm; and/or the height dimension of the bonding part (121) is in the range of 30-200 mu m; And/or the distance between the centers of the two bonding parts (121) is 0.2 mm-4 mm.
  7. 7. The solder strip fixing structure according to any one of claims 1 to 6, wherein the bonding portion (121) is an insulating adhesive or a conductive adhesive.
  8. 8. The strap fixing structure according to any one of claims 1 to 6, wherein the strap fixing structure (100) includes a plurality of straps (130) and a plurality of the adhesive members (120), the plurality of adhesive members (120) being disposed at intervals along a first direction, each of the straps (130) being adhesively fixed to the battery sheet (110) by the corresponding adhesive member (120); And/or, each welding strip (130) corresponds to two bonding pieces (120), and the two bonding pieces (120) are arranged at intervals along the second direction.
  9. 9. A back contact battery string, characterized by comprising at least two solder strip fixing structures (100) according to any of claims 1 to 8; The battery pieces (110) in the at least two welding strip fixing structures (100) are arranged at intervals along the second direction, and the welding strips (130) in the welding strip fixing structures (100) are connected with the battery pieces (110) in the former welding strip fixing structures (100) and the battery pieces (110) in the latter welding strip fixing structures (100).
  10. 10. A photovoltaic module comprising at least a cover plate, a back plate, and a plurality of back contact cell strings of claim 9; The back contact battery strings are connected in parallel and/or in series, the cover plate and the back plate are arranged on two sides of the back contact battery strings, and the cover plate, the back contact battery strings and the back plate are packaged to form the photovoltaic module.

Description

Welding strip fixing structure, back contact battery string and photovoltaic module Technical Field The application relates to the technical field of solar cells, in particular to a welding strip fixing structure, a back contact battery string and a photovoltaic module. Background At present, the series welding equipment of back contact photovoltaic cells has infrared welding and laser welding etc. and infrared welding is because of the heating of thermal radiation, consequently can set up the press wire net above the welding area and fix the welding area, and laser welding is because need penetrate the laser beam on the electrically conductive fixed part, if use press wire net fixed, press wire net can block the laser beam, influences welding quality, consequently laser welding need adopt other mode fixed welding area. At present, a relatively common method is to glue two ends of a battery piece, then place a welding strip at the glue dispensing position, then preliminarily fix the welding strip by using the glue dispensing, then place the battery piece and the welding strip between two layers of adhesive films, vacuumize the two layers of adhesive films, then fix the welding strip on the battery piece completely by using atmospheric pressure, and then perform laser welding. When the adhesive is fixed, if the adhesive dispensing amount is too small, the contact area between the welding strip and the adhesive dispensing is small, the tensile force is small, the welding strip is easy to deviate, if the adhesive dispensing amount is too large, the adhesive dispensing point is too high, the welding strip is lifted, the welding strip and the PAD point cannot be contacted, and the cold joint occurs. Disclosure of utility model Based on this, it is necessary to provide a solder strip fixing structure, a back contact battery string and a photovoltaic module, which can avoid solder strip offset, avoid the occurrence of the condition of cold solder and ensure the reliability of the photovoltaic module, aiming at the problem that the solder strip fixing is affected by too little or too much glue quantity when the solder strip is fixed at present. A solder strip fixing structure, comprising: A battery sheet; the bonding piece comprises two bonding parts, and the two bonding parts are arranged on the battery piece side by side along the first direction; And the welding strip is arranged on the battery piece along the second direction and is arranged between the two bonding parts so as to bond and fix the welding strip on the battery piece. In an embodiment of the application, the bonding portion is a dispensing, and the solder strip is disposed between two of the dispensing. In an embodiment of the present application, the diameter size of the bonding portion ranges from 0.2mm to 4mm; and/or the height dimension of the bonding part ranges from 30 mu m to 200 mu m; And/or the distance between the centers of the two bonding parts is 0.2 mm-4 mm. In an embodiment of the application, a size ratio of the bonding portion along the first direction to the second direction is in a range of 1.2-1.8:1; and/or the coating rate of the two bonding parts on the welding strip is more than 80%. In an embodiment of the application, the bonding portion is a glue strip, the glue strip extends along the second direction, and the welding strip is arranged between two glue strips. In an embodiment of the present application, a dimension of the bonding portion along the first direction is 0.2mm to 4mm; and/or the size range of the bonding part along the second direction is 0.2 mm-6 mm; and/or the height dimension of the bonding part ranges from 30 mu m to 200 mu m; And/or the distance between the centers of the two bonding parts is 0.2 mm-4 mm. In an embodiment of the application, the bonding portion is insulating glue or conductive glue. In an embodiment of the application, the welding strip fixing structure includes a plurality of welding strips and a plurality of bonding pieces, the bonding pieces are arranged at intervals along a first direction, and each welding strip is fixedly bonded to the battery piece through the corresponding bonding piece; And/or, each welding strip corresponds to two bonding pieces, and the two bonding pieces are arranged at intervals along the second direction. A back contact battery string comprising at least two solder strip securing structures as defined in any one of the above technical features; the battery pieces in the at least two welding strip fixing structures are arranged at intervals along the second direction, and the welding strips in the welding strip fixing structures are connected with the battery pieces in the former welding strip fixing structures and the battery pieces in the latter welding strip fixing structures. A photovoltaic module at least comprises a cover plate, a back plate and a plurality of back contact battery strings with the technical characteristics; The back contact battery st