Interdigital-shaped electrode structure for solar cell

The utility model discloses an interdigital-shaped electrode structure for a solar cell. An interdigital-shaped electrode is arranged on a backlight surface of the solar cell, the interdigital-shaped electrode is formed by a positive electrode and a negative electrode, the positive electrode and the negative electrode are both formed by primary grid lines and auxiliary grid lines, the primary grid lines and the auxiliary grid lines are vertical to each other and connected, the main grid lines are formed by the connection of more than two thick grid line segments via fine grid lines, and the auxiliary grid lines of the positive electrode and the negative electrode are parallel to each other and are arranged in a mutual interval manner. According to the structure, the current of the solar cell can be led out in a balanced manner, the series connection and parallel connection between cells are facilitated, and the welding tension of the electrode can be increased.