Embodiments of the present disclosure provide a solar cell string, a solar cell module, a manufacturing apparatus and a manufacturing method thereof. The solar cell string includes at least two solar cells including first and second solar cells adjacent to each other; front and back surfaces of each of the at least two solar cells are respectively provided with a grid line, and the grid line on the front surface is connected with the grid line on the back surface by a solder strip, the first and second solar cells have an overlapping region, and the overlapping region is provided with a buffer pad covering at least one side surface of the solder strip located in the overlapping region, and the buffer pad is formed by a pad which is pre-arranged in the overlapping region and melted at high temperature.

An apparatus (100) for manufacturing a photovoltaic arrangement is provided. The photovoltaic arrangement includes a conductive tab element (30) and a plurality of overlapping solar cell pieces. The apparatus includes an assembling module (300). The assembling module is configured for assembling a partial photovoltaic arrangement including a first solar cell piece (10a) and the conductive tab element. The assembling of the partial photovoltaic arrangement includes providing the first solar cell piece and the conductive tab element in an overlapping configuration. The assembling module is configured for providing a second solar cell piece (10b) and a solar cell piece of the partial photovoltaic arrangement in an overlapping configuration. The solar cell piece of the partial photovoltaic arrangement may be the first solar cell piece or a third solar cell piece (10c). Providing the second solar cell piece and the solar cell piece of the partial photovoltaic arrangement in an overlapping configuration is performed after providing the first solar cell piece and the conductive tab element in an overlapping configuration.

A multijunction solar cell including interconnected first and second discrete semiconductor regions disposed adjacent and parallel to each other including first top solar subcell, second (and possibly third) lattice matched middle solar subcells; a graded interlayer adjacent to the last middle solar subcell; and a bottom solar subcell adjacent to said graded interlayer being lattice mismatched with respect to the last middle solar subcell; wherein an opening is provided from the bottom side of the semiconductor body to one or more of the solar subcells so as to allow a discrete electrical connector to be made extending in free space and to electrically connect contact pads on one or more of the solar subcells.

A 12th solar cell and a 13th solar cell are provided to overlap in part as viewed from a side of a light receiving surface 22. A portion of a light receiving surface of the 12th solar cell and a portion of a back surface of the 13th solar cell face each other in an overlapping portion across a wire. The overlapping portion includes a part where a resin is located both between the light receiving surface of the 12th solar cell and the wire and between the back surface of the 13th cell and the wiring member.

Disclosed is a sliced cell photovoltaic module, comprising one or more cell units connected in series, wherein each cell unit comprises one cell string sequence or a plurality of cell string sequences connected in series or in parallel; each cell string sequence comprises one cell string or a plurality of cell strings connected in parallel by means of a bus bar; and each cell string comprises a plurality of small cell slices connected in series by means of connection materials; the spacing between the plurality of small cell slices is −2 to 5 mm, wherein each small cell slice is one of 2-8 independent small cell slices obtained by means of laser cutting a solar cell with a size of 156*156 to 300*300, etc.; each small cell slice has a positive electrode and a back electrode; and the positions of each positive electrode and each back electrode are superposed with each other or are respectively at the edges of two ends of the small cell slice. According to the photovoltaic module of the present application, the module power is greatly improved, and a sharp increase in a short-circuit current of the module cannot be caused, such that the power loss cannot be increased, and a potential failure risk, caused by an increase in a rated current of a junction box, of the module can also be avoided.

Methods of fabricating solar cells having junctions retracted from cleaved edges, and the resulting solar cells, are described. In an example, a solar cell includes a substrate having a light-receiving surface, a back surface, and sidewalls. An emitter region is in the substrate at the light-receiving surface of the substrate. The emitter region has sidewalls laterally retracted from the sidewalls of the substrate. A passivation layer is on the sidewalls of the emitter region.

A solar panel manufacturing apparatus includes a stage on which a substrate is placed, a pressing plate to press an adhesive applied on the substrate and thereby spread the adhesive via a solar cell arranged at a predetermined position on the adhesive, and to retain the position of the solar cell relative to the substrate, and a curing unit to cure only a part of the adhesive spread between the substrate and the solar cell, while the pressing plate is pressing the adhesive and retaining the position of the solar cell relative to the substrate.

The technology of this application relates to a cell assembly and a method for preparing a cell assembly. The cell assembly includes a first subcell, a second subcell adjacent to the first subcell, and a bottom electrode. Both the first subcell and the second subcell include a P-type layer and an N-type layer, and a light-harvesting layer located between the P-type layer and the N-type layer. The P-type layer of the first subcell is connected to the N-type layer of the second subcell by using the bottom electrode. A connection manner between subcells is provided. Compared with a current manner in which P1, P2, and P3 gaps are formed between subcells through cutting to implement interconnection, geometrical optical loss brought by interconnection between the subcells can be reduced.

A photovoltaic device (10) is provided that comprises serially arranged photovoltaic device cells (10A, 10B). Each cell having a transparent electrode layer region electrical conductors (121A, . . . , 124A) forming an electric contact with the transparent electrode layer region, a photo-voltaic stack portion (14A, 14B) that extends over the transparent electrode region (11A, 11B) and over an insulated portion of the electrical conductors, a further electrode region (15A, 5B) that extends over the photovoltaic stack portion (14A,14B). A further electrode region (15A) of a photovoltaic device cell (10A) extends over electric contacts formed by exposed ends (12B1) of the electrical conductors of a subsequent photovoltaic device cell (10B).

Metallization and stringing methods for back-contact solar cells, and resulting solar cells, are described. In an example, in one embodiment, a method involves aligning conductive wires over the back sides of adjacent solar cells, wherein the wires are aligned substantially parallel to P-type and N-type doped diffusion regions of the solar cells. The method involves bonding the wires to the back side of each of the solar cells over the P-type and N-type doped diffusion regions. The method further includes cutting every other one of the wires between each adjacent pair of the solar cells.