KETEP 세계에너지시장정보

A photovoltaic module, comprising: at least one cell string (101), wherein each of the at least one cell string includes a plurality of solar cell sheets (102), each of the plurality of solar cell sheets (102) includes a substrate (1021), the substrate (1021) has: a front surface, a back surface opposite to the front surface, a first passivation layer (1022) disposed on the front surface of the substrate (1021), and a second passivation layer (1023) disposed on the back surface of the substrate (1021), a plurality of bus bars (1024) disposed on a surface of the second passivation layer (1023), wherein the plurality of bus bars (1024) are disposed at intervals along a first direction (X) and extend along a second direction (Y), and each of the plurality of bus bars (1024) includes a plurality of bonding pads (1025) disposed at intervals along the second direction (Y) and a bus connecting line (801); a plurality of welding strips (103), wherein two adjacent solar cell sheets (102) in the plurality of solar cell sheets (102) are connected to each other by one of the plurality of welding strips (103), and each of the plurality of welding strips (103) is in electrical contact with a corresponding bus bar (1024), and each of the plurality of welding strips (103) includes a plurality of bending portions arranged continuously along the second direction (Y), and an orthographic projection of a central line of each of the plurality of welding strips (Y) on a back surface of the solar cell sheet (102) coincides with an orthographic projection of a central line of the corresponding bus bar (1024) on the back surface of the solar cell sheet (102) and/or an orthographic projection of a central line of each of the plurality of bonding pads (1025) on the corresponding bus bar (1024) on the back surface of the solar cell sheet (102) along the second direction (Y); and at least one package layer (120) and at least one cover plate (130), wherein the at least one package layer (120) is disposed on a surface of the at least one cell string (101), the at least one cover plate (130) is disposed on a surface of the at least one package layer (120) away from the at least one cell string (101), the at least one package layer (120) and the at least one cover plate (130) are laminated; wherein each of the plurality of bonding pads (1025) is in electrical contact with two adjacent bending portions in the plurality of bending portions on each of the plurality of welding strips (103); characterized in that each of the plurality of bending portions includes a first bending portion (901) in electrical contact with a corresponding bonding pad in the plurality of bonding pads and a second bending portion (902) not in electrical contact with any of the plurality of bonding pads (1025); along a third direction (Z), the first bending portion (901) is bigger than the second bending portion (902) in size, and the third direction (Z) is perpendicular to a bending direction of each of the plurality of bending portions.