Solar cell and photovoltaic module

A photovoltaic module, comprising:

• at least one cell string each formed by connecting a plurality of solar cells, wherein each of the plurality of solar cells includes:
• a substrate including a center region and edge regions, wherein the edge regions are respectively arranged on two opposing sides of the center region;
• a plurality of fingers arranged at intervals along a first direction, each of plurality of fingers extending along a second direction, the plurality of fingers including a number of fingers in the center region;
• a plurality of pad groups arranged at intervals along the second direction, wherein each pad group of the plurality of pad groups includes a plurality of pads arranged at intervals along the first direction, and the plurality of pads include a number of pads in the center region that are respectively connected to the number of fingers in the center region;
• and
• a plurality of busbars arranged at intervals along the second direction, wherein each of the plurality of busbars is connected to a respective pad group of some of the plurality of pad groups, and at least one of the plurality of pad groups is disposed between two adjacent busbars of the plurality of busbars;
• wherein a respective pad of the plurality of pads includes a first end portion, a body portion and a second end portion connected in sequence along the second direction, a length of each of the first end portion and the second end portion in the first direction is greater than a length of the body portion in the first direction, and a width of each of the first end portion and the second end portion in the second direction is less than a width of the body portion in the second direction;
• at least one welding strip each connected to two adjacent solar cells, wherein each of the at least one welding strip is connected to each of the plurality of pad groups in a respective one of the two adjacent solar cells;
• at least one encapsulation layer each covering a surface of the at least one cell string;
• and
• at least one cover plate each covering a surface of a respective encapsulation layer facing away from the at least one cell string.