一种光伏电池分步印刷栅线结构

Abstract

本实用新型涉及光伏电池技术领域，公开了一种光伏电池分步印刷栅线结构，其包括：主栅线，主栅线沿电池片的第一方向布置；副栅线，副栅线沿电池片的第二方向布置并与主栅线垂直，副栅线包括间隔布置的第一副栅线区、第二副栅线区和第三副栅线区，相邻副栅线区之间通过连接栅连接，且连接栅中心与主栅线连接。本实用新型通过将传统副栅拆分成三个区域图形并分步印刷，提高印刷质量，减少印刷缺陷，优化电池的导电性能和光电转换效率，同时提高工艺的灵活性，以适应不同的电池生产需求。

Claims

1. A photovoltaic cell step-and-repeat printed gridline structure, characterized by, include: Main busbar (1), the main busbar (1) is arranged along the first direction of the cell; Sub-busbars are arranged along the second direction of the cell and perpendicular to the main busbar (1). The sub-busbars include a first sub-busbar region (2), a second sub-busbar region (3), and a third sub-busbar region (4) arranged at intervals. Adjacent sub-busbar regions are connected by connecting grids (5), and the center of the connecting grids (5) is connected to the main busbar (1). The first sub-busbar region (2) includes multiple first sub-busbar sections (21), which are symmetrically arranged on both sides of the cell and arranged at intervals. Each first sub-busbar section (21) includes multiple parallel sub-busbars, and connecting grids (5) are provided on both sides of the sub-busbars.

2. A photovoltaic cell step-printed gridline structure according to claim 1, wherein, The second sub-grid area (3) includes multiple second sub-grid sections (31), which are symmetrically arranged on both sides of the cell and spaced apart. Each second sub-grid section (31) includes multiple parallel sub-grid lines, and connecting grids (5) are provided on both sides of the sub-grid lines. The second sub-grid sections (31) are staggered with the first sub-grid sections (21), and the second sub-grid sections (31) are located on the side of the first sub-grid section (21) away from the center of the cell.

3. A photovoltaic cell structure for stepwise printing of grid lines, according to claim 2, wherein, The third sub-grid area (4) includes multiple third sub-grid sections (41), which are located at the center of the cell and are closely connected. Each third sub-grid section (41) includes multiple parallel sub-grid lines, and connecting grids (5) are provided on both sides of the sub-grid lines. The third sub-grid area (4) is connected to the first sub-grid areas (2) on both sides.

4. The structure of claim 1, wherein the grid lines are printed in steps. The area ratio of the first sub-grid area (2), the second sub-grid area (3), and the third sub-grid area (4) is S1:S2:S3, where S1 is set to 0.8~1.2, S2 is set to 0.8~1.2, and S3 is set to 1.

5. The structure of claim 3, wherein the grid lines are printed in steps. The widths of the first subgrid section (21), the second subgrid section (31), and the third subgrid section (41) are equal along the second direction.

6. The step-printed gridline structure of a photovoltaic cell according to claim 1, wherein, Multiple solder joints (11) are provided on the main grid line (1).

7. A photovoltaic cell step-printed gridline structure according to claim 6, wherein, Connecting parts (22) are provided on the first sub-grid area (2), the second sub-grid area (3) and the third sub-grid area (4). The connecting parts (22) are located at both ends and the center of the sub-grid area in the first direction. The connecting parts (22) are connected to the solder joints (11).

8. A photovoltaic cell step-printed gridline structure according to claim 7, wherein, The connecting part (22) is configured as a V-shaped structure, and the narrow end of the connecting part (22) is connected to the solder joint (11).

9. The step-printed gridline structure of a photovoltaic cell according to claim 1, wherein, The main grid line (1) is provided with first side lines (12) on both sides of the second direction, and the second sub-grid line area (3) is provided with second side lines (32) on both sides of the second direction. The first side lines (12) are connected to the second side lines (32).

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