Back contact cell and photovoltaic module

A back contact cell, comprising:

• a substrate, the substrate having a first surface and a second surface opposite to each other, the second surface having a first edge;
• a first doped conductive layer and a second doped conductive layer, portions of the first doped conductive layer and portions of the second doped conductive layer being alternately distributed across the second surface, doping elements in the first doped conductive layer being of a first conductivity type and doping elements in the second doped conductive layer being of a second conductivity type that is different from the first conductivity types;
• first grid lines and second grid lines alternately arranged along a first direction, at least a portion of the first grid lines being in electrical contact with the first doped conductive layer, at least a portion of the second grid lines being in electrical contact with the second doped conductive layer;
• first connection lines and second connection lines alternately arranged along a second direction, a respective first connection line of the first connection lines being electrically connected to a respective set of the first grid lines, the first connection lines comprising edge connection lines and intermediate connection lines, the edge connection lines having no welding portions provided thereon, the second connection lines including a second connection line adjacent to the edge connection lines and comprising a plurality of functional portions spaced apart from each other in the first direction, a respective functional portion of the plurality of functional portions being connected to a respective set of a plurality of sets of the second grid lines;
• a connection structure having a first end electrically connected to an edge connection line, the connection structure extending from the first end in the second direction and passing through a space between two adjacent functional portions to be electrically connected to the intermediate connection lines adjacent to the edge connection lines.