Interdigital electrode for solar battery

Abstract

The invention discloses an interdigital electrode for a solar battery. The interdigital electrode is disposed on the shady face of a solar cell and composed of a positive pole and a negative pole; each of the positive pole and the negative pole is composed of main grid lines and auxiliary grid lines; the main grid lines are perpendicular to and connected with the auxiliary grid lines; each main grid line is made by connecting more than two thick grid segments though thin grid lines; the auxiliary grid lines of the positive pole and those of the negative pole are mutually parallel and are mutually spaced. The interdigital electrode with the structure has the advantages that current of the solar battery can be guided out in a balanced way, series and parallel connection of the solar batteries is favored, and welding tension of the interdigital electrode on back-contact solar batteries is higher.

Description

Technical field [0001] The invention involves a type of electrode structure of solar cells, which specifically disclose a finger -shaped electrode of a solar cell. Background technique [0002] The positive and auxiliary electrode of the traditional solar cell is located on both sides of the solar cell. The method of printing is used, especially the design method of the front electrode figure 1 It is shown in the pattern design method of multiple homogeneous electrodes (positive or negative) on the same side of the solar electrode. This solar cell pattern cannot be used for back to contact with solar batteries.In the design of the electrode pattern designed by the back contacting solar cell (such as the authorized announcement number CN 102185030 B; CN 102185031), because the positive and sideline electrode of the solar cell is located on the back of the solar cell, it is generally used as such as such as figure 2 The electrodes shown in this electrode structure will be small due...

AI Technical Summary

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 adopted such as Figure 2 shows the electrode, this electrode structure is due to the electrode connection The outlet area is small, and 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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