Splicing adhesive film, method for manufacturing splicing adhesive film, and photovoltaic module

A method for manufacturing a splicing adhesive film including a first portion and a plurality of second portions, implemented by a splicing adhesive film manufacturing apparatus, comprising:

• forming the first portion, wherein the first portion includes a first material and is disposed in a central region of the splicing adhesive film;
• and
• forming the plurality of second portions, wherein each of the plurality of second portions includes a second material and is at least partially disposed in an edge region of the splicing adhesive film, the edge region at least partially surrounding the central region;
• wherein the first portion and each of the plurality of second portions partially overlap in a first direction, and a maximum thickness P of each of the plurality of second portions in the edge region is greater than a maximum thickness Q of the first portion in the central region in the first direction;
• wherein each of the plurality of second portions includes a first sub-portion and a second sub-portion that are disposed in the central region;
• wherein the first sub-portion is disposed on a side of the second sub-portion adjacent to the first portion and overlaps with the first portion, and the second sub-portion does not overlap with the first portion in the first direction;
• wherein the first sub-portion has a width in a range of 1 mm to 20 mm in a second direction perpendicular to the first direction;
• and
• wherein the splicing adhesive film manufacturing apparatus includes:
• a base plate having a first edge with a thickness in a first direction;
• a roller disposed on a side of the base plate and configured to be controlled to be rotated;
• a first discharge device disposed on the first edge and configured to be filled with a first material, melt the first material, and discharge a melted first material;
• and
• a plurality of second discharge devices disposed on the first edge and configured to be filled with a second material, melt the second material, and discharge a melted second material;
• wherein, the first discharge device is disposed between adjacent second discharge devices in a second direction, and the second direction is perpendicular to the first direction;
• and
• during rotation of the roller, the melted first material and the melted second material are propagated along a third direction on a surface of the base plate, and the base plate coordinates with the roller to extrude the melted first material to form the first portion and to extrude the melted second material to form the plurality of second portions, wherein the third direction is perpendicular to the second direction;
• and
• during extrusion of the roller and the base plate, the melted first material and the melted second material are overlapped at a junction of the melted first material and the melted second material, such that the first portion and each of the plurality of second portions are at least partially overlapped in the first direction, and extrusion of the roller and the base plate enables that the maximum thickness P of each of the plurality of second portions formed is greater than the maximum thickness Q of the first portion.

A photovoltaic module, comprising:

• at least one glass cover plate, comprising a first glass cover plate and a second glass cover plate that are disposed opposite to each other in a first direction;
• at least one splicing adhesive film disposed between the first glass cover plate and the second glass cover plate and comprising a first adhesive film and a second adhesive film which are opposite to each other;
• and
• a plurality of solar cells disposed between the first adhesive film and the second adhesive film, wherein
• each of the at least one splicing adhesive film includes:
• a first portion, wherein the first portion includes a first material and is disposed in a central region of the splicing adhesive film;
• and
• a plurality of second portions, wherein each of the plurality of second portions includes a second material and is at least partially disposed in an edge region of the splicing adhesive film, and the edge region is at least partially surrounding the central region;
• wherein the first portion and each of the plurality of second portions partially overlap in a first direction, and a maximum thickness P of each of the plurality of second portions in the edge region is greater than a maximum thickness Q of the first portion in the central region in the first direction;
• wherein each of the plurality of second portions includes a first sub-portion and a second sub-portion that are disposed in the central region;
• wherein the first sub-portion is disposed on a side of the second sub-portion adjacent to the first portion and overlaps with the first portion, and the second sub-portion does not overlap with the first portion in the first direction and overlaps with at least one solar cell of the plurality of solar cells in the first direction;
• and
• wherein the first sub-portion has a width in a range of 1 mm to 20 mm in a second direction perpendicular to the first direction.