Back contact cell and photovoltaic module

A back contact cell, comprising:

• a cell base having a first edge;
• first finger electrodes and second finger electrodes alternatingly arranged along a first direction;
• first connection electrodes and second connection electrodes alternatingly arranged along a second direction, the first connection electrodes being connected to the first finger electrodes, and the second connection electrodes being connected to the second finger electrodes;
• wherein the first connection electrodes include an edge connection electrode adjacent to the first edge, and no soldering portion is provided on the edge connection electrode;
• a second connection electrode immediately adjacent to the first edge includes separate collection portions, wherein at least one collection portion is connected to one or more respective second finger electrodes of the second finger electrodes;
• and
• a connection structure, wherein the connection structure is connected at one end to the edge connection electrode, extends through a space between two adjacent collection portions of the second connection electrode immediately adjacent to the edge connection electrode, and is connected at another end to one of the first connection electrodes adjacent to the edge connection electrode;
• wherein at least one of the two adjacent collection portions includes a first portion adjacent to the connection structure and a second portion away from the connection structure, and the first portion is wider in the second direction than the second portion.