Interdigitated electrode for solar cell

Abstract

The invention discloses an interdigitated electrode for a solar cell. The interdigitated electrode is arranged on the backlight surface of a solar battery sheet. The interdigitated electrode is composed of a positive electrode and a negative electrode, and both the positive electrode and the negative electrode are composed of a main grid line and an auxiliary grid line. , the main grid line is perpendicular to and connected to the auxiliary grid line, and the main grid line is formed by connecting more than two thick grid line segments through thin grid lines; the positive and negative auxiliary grid lines are arranged parallel to each other and spaced from each other. This structure can lead out the current of the solar cell in a balanced manner, and is conducive to the series-parallel connection between the cells, and can increase the welding tension of the electrode on the back-contact solar cell.

Description

technical field [0001] The invention relates to an electrode structure of a solar cell, and specifically discloses an interdigitated electrode for a solar cell. Background technique [0002] The positive and negative electrodes of traditional solar cells are respectively located on both sides of the solar cell, and the method of printing separately is adopted, especially the design method of the front electrode is as follows: figure 1 As shown, using the pattern design method of multiple same-sex electrodes (positive or negative) on the same side of the solar electrode, this solar cell pattern cannot be used for back-contact solar cells. In the electrode pattern design of the back-contact solar cell (for example, the structure described in the patent of CN 102185030 B; CN 102185031), since the positive and negative contact electrodes of the solar cell are located on the back of the solar cell, it is generally used as follows: figure 2 As shown in the electrode structure, d...

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Problems solved by technology

[0002]The positive and negative electrodes of traditional solar cells are located on both sides of the solar cell respectively, and the method of printing separately is adopted, especially the design method of the front electrode such as Figure 1, using multiple same-sex electrodes (positive or negative) on the sun The pattern design method on the same side of the electrode, this solar cell pattern cannot be used for back contact solar cells

In the electrode pattern design of the back-contact solar cell (for example, the structure described in the patent of CN 102185030 B; CN 102185031), since the positive and negative contact electrodes of the solar cell are located on the back of the solar cell, it is generally used as follows: figure 2 As shown in the electrode structure, due to the small area of ​​the electrode connection point, the welding tension of the electrode welding will be small. In addition, the packaging process different from the traditional solar cell module production line must be used, and the cost is high.

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