Abstract: Provided are a solar cell, a method for manufacturing a solar cell, and a photovoltaic module. A plurality of first pad groups and at least one second pad group are arranged along a first direction on a back surface of the solar cell. The second pad group is distributed in a region of the solar cell adjacent to a cut edge or a non-cut edge of the solar cell. The first pad groups are distributed in a region of the solar cell away from the cut edge or the non-cut edge. Along the first direction, a distance between a pad in the second pad group and a pad in the first pad group adjacent to the pad in the second pad group is greater than a distance between adjacent pads in adjacent first pad groups.

Abstract: A solar cell and a photovoltaic module are disclosed. The photovoltaic module includes a substrate, busbars, and at least one marker. The busbars are arranged on a same side of the substrate, and include at least a first busbar and a second busbar, the first busbar and the second busbar have opposite polarities, the first busbar has a first pad, the second busbar has a second pad, the first pad and the second pad are arranged sequentially along a straight line parallel to an arrangement direction of the busbars, and a distance from a marker to the first pad is different from a distance from a same marker to the second pad.

Abstract: Embodiments of the present disclosure provide a method for welding cell strings and a series welding machine. The method includes: forming an arrangement of a plurality of solar cells; inspecting the arrangement of the plurality of solar cells; providing a plurality of initial welding strips including first initial welding strips and second initial welding strips, the first initial welding strips interleave with the second initial welding strips in a first direction; cutting each of the first initial welding strips at first cutting positions, and cutting each of the second initial welding strips at second cutting positions, to obtain a plurality of welding strips; moving each welding strip in a second direction to form a set of welding strips; transferring the set of welding strips onto the arrangement of the plurality of solar cells; and welding the plurality of welding strips to corresponding solar cells to form a cell string.

Abstract: A method for manufacturing photovoltaic module includes: providing solar cells and a solder strip; applying insulating adhesive on rear surface of the solar cells; laying the solar cells along a first direction; placing the solder strip on the solar cells so that, along the first direction, one end of the solder strip abuts against a positive busbar of one solar cell, and is bonded to the insulating adhesive, and the other end of the solder strip abuts against a negative busbar of another solar cell adjacent thereto, and is bonded to the insulating adhesive; curing the insulating adhesive by irradiation with an ultraviolet lamp, so that the solar cells form a solar cell string; arranging the solar cell strings along a second direction, and connecting to form a photovoltaic cell pack; providing and laminating front packaging structure, the photovoltaic cell pack, and back packaging structure to form the photovoltaic module.

Abstract: The solar cell includes a substrate having a first surface and a second surface opposite to the first surface, and multiple first busbars arranged sequentially along a first direction on the first surface of the substrate, where at least one of the multiple first busbars is near at least one of the two opposite edges of the substrate along the first direction includes at least one first widened portion. The solar cell further includes multiple second busbars arranged sequentially along the first direction on the second surface of the substrate, where at least one of the multiple second busbars is near at least one of the two opposite edges of the substrate along the first direction includes at least one second widened portion, and each of the at least one second widened portion is larger than each of the at least one first widened portion.

Abstract: The present disclosure relates to a photovoltaic module, a manufacturing method for a photovoltaic module, and a machining device. The photovoltaic module includes solar cell strings and electrode lines. Each of the solar cell strings includes solar cells arranged in parallel, and each of the electrode lines is located on a side of a corresponding solar cell and configured to connect adjacent solar cells to form the solar cell strings. soldering regions are arranged apart along a length direction of the photovoltaic module, connecting members are arranged in the soldering regions, each of the electrode lines is located on a side of a corresponding solar cell provided with the connecting members on the side.

Abstract: The solar cell includes a substrate having a central region and two peripheral regions. The solar cell further includes multiple finger electrodes arranged at intervals along the first direction, and the multiple finger electrodes include multiple first finger electrodes and multiple second finger electrodes. Each of the multiple first finger electrodes includes first body portions and first widened portions arranged alternatingly along the second direction, each of the multiple second finger electrodes includes second body portions and second widened portions arranged alternatingly along the second direction, and the first widened portions are arranged and aligned to the second widened portions. A respective first widened portion of a respective first finger electrode in two first finger electrodes farthest from the central region on the substrate has a larger orthographic projection than a respective first widened portion of each of two first finger electrodes closest to the central region.

Abstract: A photovoltaic module and a method for a photovoltaic module are provided. The photovoltaic module includes a photovoltaic cell pack, a front packaging structure, and a back packaging structure. The photovoltaic cell pack includes solar cell strings spaced apart along a width direction of the photovoltaic module. The front packaging structure is arranged on a light-facing surface of the photovoltaic cell pack, and the front packaging structure includes a front sheet and a front packaging layer. The back packaging structure is arranged on a backlight surface of the photovoltaic cell pack, and the back packaging structure includes a back sheet and a back packaging layer. The back sheet and the front sheet jointly clamp the front packaging layer, the photovoltaic cell pack, and the back packaging layer. A distance L1 between two adjacent solar cell strings along the width direction of the photovoltaic module satisfies: 0.3 mm?L1?1.5 mm.

Abstract: Provided is a solder strip. A cross section of the solder strip includes a base portion and a reflective portion arranged above the base portion. The reflective portion includes a top edge, a first side edge and a second side edge. A first angle is formed between the first side edge and an extension line of the top edge. A second angle is formed between the second side edge and the extension line of the top edge. The first angle and the second angle are greater than 42.5°.

Abstract: The present disclosure provides a functional part, a photovoltaic module and a manufacturing method of photovoltaic modules. The functional part is configured to form a photovoltaic module with a cell string that includes a plurality of cells. Adjacent cells of the cell string share an overlapped region. The functional part has a first surface facing the cell string and a second surface opposite to the first surface. The functional part includes at least one groove extending from the first surface towards the second surface. A location of each groove corresponds to a location of at least one overlapped region.

Abstract: Embodiments of the present disclosure provide a method for welding cell strings and a series welding machine. The method includes: forming an arrangement of a plurality of solar cells; inspecting the arrangement of the plurality of solar cells; providing a plurality of initial welding strips including first initial welding strips and second initial welding strips, the first initial welding strips interleave with the second initial welding strips in a first direction; cutting each of the first initial welding strips at first cutting positions, and cutting each of the second initial welding strips at second cutting positions, to obtain a plurality of welding strips; moving each welding strip in a second direction to form a set of welding strips; transferring the set of welding strips onto the arrangement of the plurality of solar cells; and welding the plurality of welding strips to corresponding solar cells to form a cell string.

Abstract: The present disclosure provides a functional part, a photovoltaic module and a method of manufacturing photovoltaic modules. The functional part is configured to form a photovoltaic module with a cell string that includes a plurality of cells. Adjacent cells of share an overlapped region. The functional part has a first surface facing the cell string and a second surface opposite to the first surface. The functional part includes at least one groove extending from the first surface toward the second surface. A location of each groove corresponds to a location of at least one overlapped region.

Abstract: A method for visual inspection of a photovoltaic module, including: turning on a first light source located above the photovoltaic module, and recording, by an image collector, first coordinates and second coordinates of edge intersections at ends of the film strips; turning on a second light source located below the photovoltaic module, and recording, by the image collector, third coordinates and fourth coordinates of overlapping points among edges of the solar cells, the ends of the film strips, and the cell gaps or the string gaps; and analyzing, by the image collector, differences between the first coordinates and the third coordinates and between the second coordinates and the fourth coordinates along width directions of the cell gaps or the string gaps, wherein the differences are overlap spacings between the film strips and the solar cells.

Abstract: A back-contact photovoltaic module and a manufacturing method thereof. The back-contact photovoltaic module includes a glass substrate, an upper adhesive film layer, a solar cell layer, a lower adhesive film layer, and a back sheet arranged in sequence from top to bottom. The solar cell layer includes a plurality of back-contact solar cells, and each of the plurality of back-contact solar cells comprises a front surface provided with a transparent support layer. The transparent support layer protrudes from a corresponding front surface, and the transparent support layer covers a partial region of the corresponding front surface. Accordingly, the front surface of each of the plurality of back-contact solar cells can be protected, and the risk of scratches to the back-contact photovoltaic module reduced.

Abstract: Provided are a photovoltaic module, comprising a solar cell string having a plurality of solar cells arranged in sequence, adjacent solar cells being connected by solder strips, the solder strip being connected to a front surface of one solar cell and to a back surface of the other solar cell, a long-side dimension of the solar cell being within a range of 150 mm to 220 mm; two protective adhesive layers respectively covering front and back surfaces of the solar cell string, a dimensional difference between thicknesses of one protective adhesive layer and the solder strip being defined as first thickness, a ratio of the first thickness to the thickness of one protective adhesive layer being not less than 0 and not greater than 20%; a transparent plate covering the protective adhesive layer on the front surface; and a back plate covering the protective adhesive layer on the back surface.

Abstract: Provided are a photovoltaic module, comprising a solar cell string having a plurality of solar cells arranged in sequence, adjacent solar cells being connected by solder strips, the solder strip being connected to a front surface of one solar cell and to a back surface of the other solar cell, a long-side dimension of the solar cell being within a range of 150 mm to 220 mm; two protective adhesive layers respectively covering front and back surfaces of the solar cell string, a dimensional difference between thicknesses of one protective adhesive layer and the solder strip being defined as first thickness, a ratio of the first thickness to the thickness of one protective adhesive layer being not less than 0 and not greater than 20%; a transparent plate covering the protective adhesive layer on the front surface; and a back plate covering the protective adhesive layer on the back surface.

Abstract: Provided is a solder strip. A cross section of the solder strip includes a base portion and a reflective portion arranged above the base portion. The reflective portion includes a top edge, a first side edge and a second side edge. A first angle is formed between the first side edge and an extension line of the top edge. A second angle is formed between the second side edge and the extension line of the top edge. The first angle and the second angle are greater than 42.5° .

Abstract: Provided are a photovoltaic module, comprising a solar cell string having a plurality of solar cells arranged in sequence, adjacent solar cells being connected by solder strips, the solder strip being connected to a front surface of one solar cell and to a back surface of the other solar cell, a long-side dimension of the solar cell being within a range of 150 mm to 220 mm; two protective adhesive layers respectively covering front and back surfaces of the solar cell string, a dimensional difference between thicknesses of one protective adhesive layer and the solder strip being defined as first thickness, a ratio of the first thickness to the thickness of one protective adhesive layer being not less than 0 and not greater than 20%; a transparent plate covering the protective adhesive layer on the front surface; and a back plate covering the protective adhesive layer on the back surface.

Abstract: The present disclosure provides a functional part, a photovoltaic module and a method of manufacturing photovoltaic modules. The functional part is configured to form a photovoltaic module with a cell string that includes a plurality of cells. Adjacent cells of share an overlapped region. The functional part has a first surface facing the cell string and a second surface opposite to the first surface. The functional part includes at least one groove extending from the first surface toward the second surface. A location of each groove corresponds to a location of at least one overlapped region.

Abstract: The present disclosure relates to a method and apparatus for manufacturing a semiconductor sheet assembly. The method for manufacturing a semiconductor sheet assembly includes positioning a semiconductor sheet, and determining a first region to be grooved and a defect position in the first region; cutting and grooving the semiconductor sheet along the defect position in the first region; and splitting the semiconductor sheet that is cut and grooved.