Auxiliary grid screen printing plate and auxiliary grid

CN224276598UActive Publication Date: 2026-05-26FENGYANG CHINT SOLAR TECHNOLOGY CO LTD
View PDF 0 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
FENGYANG CHINT SOLAR TECHNOLOGY CO LTD
Filing Date
2025-03-06
Publication Date
2026-05-26

AI Technical Summary

Technical Problem

When increasing the number of sub-busbars in existing TOPCon solar cells to improve efficiency, it is difficult to balance the issues of shading area and resistance. Traditional designs cannot simultaneously improve conversion efficiency and reduce shading area.

Method used

The design employs a knotless mesh with a 500-mesh, 7μm wire diameter and a 12μm wide subgrid pattern hole design. Combined with a PI film layer and LIF laser paste, a high-mesh, narrow-linewidth subgrid screen is formed, ensuring reduced screen thickness and improved ink permeability, avoiding line breakage, and enhancing the cell conversion efficiency.

Benefits of technology

By reducing the width and thickness of the sub-grid lines, the shading area is reduced, the slurry permeability is enhanced, and wire breakage is prevented, thereby improving the photoelectric conversion efficiency of the solar cells. Experimental results show that the efficiency is improved by 0.045-0.049%.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN224276598U_ABST
    Figure CN224276598U_ABST
Patent Text Reader

Abstract

The utility model discloses an auxiliary grid screen printing plate and an auxiliary grid, which are applied to the technical field of solar cells and comprise a gauze and a photosensitive adhesive film layer attached to the gauze, the total thickness of the gauze and the photosensitive adhesive film layer is 16 [mu] m + / -2 [mu] m and comprises values at two ends; the mesh yarns are mesh knot-free mesh yarns with the wire diameter of 500 meshes and 7 microns; at least 170 auxiliary grid pattern holes are formed in the photosensitive adhesive film layer; the width of the auxiliary grid pattern hole is 12 [mu] m + / -2 [mu] m, and the auxiliary grid pattern hole comprises values at two ends; the auxiliary grid pattern holes are in one-to-one correspondence with the auxiliary grids. Compared with a conventional screen printing plate, the width of an auxiliary grid pattern is reduced, the printing line width of a solar cell can be effectively reduced, the shading area can be greatly reduced due to the reduction of the line width, meanwhile, the thickness of the screen printing plate is reduced, the ink permeability of auxiliary grid pattern holes can be effectively improved, slurry can permeate more easily, line breakage is prevented, and the grid line quality is improved; and the conversion efficiency of the battery piece can be improved.
Need to check novelty before this filing date? Find Prior Art