A solar cell and photovoltaic module

By designing the sub-grids of the solar cells as an intermittent structure and connecting them into a continuous shape, the problems of printing screen strength and lifespan were solved, achieving efficient current collection and low-cost production.

CN224319806UActive Publication Date: 2026-06-02TONGWEI SOLAR ENERGY (CHENGDU) CO LID
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
TONGWEI SOLAR ENERGY (CHENGDU) CO LID
Filing Date
2025-04-27
Publication Date
2026-06-02

AI Technical Summary

Technical Problem

The existing solar cells have a continuous and long sub-grid structure, which reduces the structural strength of the printing screen, shortens its service life, and makes it difficult to print narrower linewidth sub-grids using a high aperture ratio printing screen.

Method used

The sub-grid of the solar cell is designed as an intermittent structure and connected into a continuous structure by connecting grid lines. A narrower linewidth sub-grid is printed using a high aperture ratio printing screen. The connecting grid lines are located on the side of the first functional film away from the doped layer and embedded in part of the thickness to reduce damage to the functional film.

Benefits of technology

This improved the structural strength and lifespan of the printing screen, while also enhancing current collection efficiency and power transmission continuity, thereby increasing the conversion efficiency of solar cells and reducing production costs.

✦ Generated by Eureka AI based on patent content.

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Abstract

The application relates to the technical field of solar cells, in particular to a solar cell and a photovoltaic module. The solar cell comprises a substrate, a doped layer, a first functional film, a plurality of auxiliary grids, a plurality of connecting grid lines and a main grid. The doped layer is arranged on the surface of the substrate. The first functional film is arranged on the side of the doped layer away from the substrate. Each auxiliary grid is arranged on the first functional film and is in ohmic contact with the doped layer through the first functional film; the length direction of the auxiliary grid is the first direction, and the plurality of auxiliary grids are arranged in a row in the first direction. In the same row of auxiliary grids, each adjacent two auxiliary grids have a spacing part. The connecting grid line is arranged in each spacing part, and in the first direction, the connecting grid line is connected between the two auxiliary grids on the two sides of the spacing part. The main grid is arranged on the first functional film and extends along the second direction, and the second direction intersects the first direction; the main grid intersects the connecting grid line or the auxiliary grid and is electrically connected to the row of auxiliary grids. The solar cell is beneficial to printing auxiliary grids with a relatively narrow line width.
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