Solar cell screen printing plate and printing process thereof

A solar cell and screen technology, applied in printing, printing presses, rotary printing presses, etc., can solve the problems of difficulty in reducing the proportion of broken grids, uneven EL brightness, limited cost reduction, etc., to achieve enhanced crack resistance, The effect of uniform distribution and improved efficiency

Pending Publication Date: 2020-11-20
晋能光伏技术有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, in the current conventional step-by-step printing graphic design, it is difficult to reduce the proportion of broken grids in the printing process of the battery side, and the cost reduction is limited, and the module side has over-welding, virtual welding, exposed white, high fragmentation rate, and uneven EL light and shade. unpleasant sight

Method used

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  • Solar cell screen printing plate and printing process thereof
  • Solar cell screen printing plate and printing process thereof

Examples

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Embodiment 1

[0034] This embodiment discloses a solar cell printing screen, comprising: 9 bus grid lines 1 arranged in parallel, thin grid lines perpendicular to the bus grid lines 1, and each bus grid line 1 intersects the thin grid lines 4 With fine-grid gradient lines, each busbar line 1 has 6 pads 2, a total of 4 positioning points 3 are provided on both ends of the outer two busbar lines 1, and the positioning points 3 are set on the pad 2. The position of the corresponding positioning point on the thin grid line is provided with a reference point; the width of each busbar line 1 is 0.05mm, the distance between adjacent busbar lines 1 is 22mm, and the two ends of the busbar line 1 are harpoon-like structures. The length of the shaped structure is 4mm, the inner spacing of the harpoon is 1mm, and the width of the harpoon is 0.05mm. The pad 2 is a circle, a polygon or a polygon containing arcs. When it is a rectangle, the length is 0.3mm and the width is 0.5mm. The line width of the fine...

Embodiment 2

[0036] This embodiment discloses a solar cell printing screen, including: 10 bus grid lines 1 arranged in parallel, thin grid lines perpendicular to the bus grid lines 1, and each bus grid line 1 intersects the thin grid lines 4 With fine-grid gradation lines, there are 6 pads 2 on each bus-bar line 1, a total of 4 positioning points 3 are provided on both ends of the outer two bus-bar lines 1, and the positions of the corresponding positioning points on the thin-grid line are set There is a reference point; the width of each busbar line 1 is 0.06mm, the distance between adjacent busbar lines 1 is 20mm, the two ends of the busbar line 1 are harpoon-shaped structures, the length of the harpoon-shaped structure is 5mm, and the inside of the harpoon The pitch is 1.2mm, the width of the harpoon is 0.06mm, the pad 2 is rectangular, the length is 0.5mm, the width is 0.6mm, the width of the fine grid line is 0.020mm, the length is 0.9mm, and the spacing between adjacent fine grid lines...

Embodiment 3

[0038] This embodiment discloses a solar cell printing screen, including: 10 bus grid lines 1 arranged in parallel, thin grid lines perpendicular to the bus grid lines 1, and each bus grid line 1 intersects the thin grid lines 4 With fine-grid gradation lines, there are 6 pads 2 on each bus-bar line 1, a total of 4 positioning points 3 are provided on both ends of the outer two bus-bar lines 1, and the positions of the corresponding positioning points on the thin-grid line are set There is a reference point; the width of each busbar 1 is 0.08mm, the distance between adjacent busbars 1 is 18mm, the two ends of the busbar 1 are harpoon-shaped structures, the length of the harpoon-shaped structure is 6mm, and the inside of the harpoon The spacing is 1.4mm, the width of the harpoon is 0.08mm, the pad 2 is rectangular, the length is 0.8mm, the width is 0.8mm, the width of the fine grid line is 0.050mm, the length is 1.5mm, and the spacing between adjacent fine grid lines is 0.12mm. ...

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Abstract

The invention discloses a solar cell screen printing plate and a printing process thereof. The solar cell screen printing plate comprises at least nine main grid lines arranged in parallel and thin grid lines perpendicular to the main grid lines, a thin grid gradual change line is arranged at the intersection of each main grid line and the corresponding thin grid line, six bonding pads are arranged on each main grid line, four positioning points are arranged at the two ends of the two main grid lines on the outer side in total, and reference points are arranged at the positions, correspondingto the positioning points, of the thin grid lines. According to the solar cell screen printing plate and the printing process thereof, the path of current transmitted to the main grid lines is obviously shortened, the efficiency of tin flowing to the bonding pads during welding is improved, an overall resistance value of a battery is reduced and distributed more uniformly, and the current flowingthrough each interconnection strip solder strip on a component layer is also correspondingly reduced, so that the impedance loss on the solder strip is reduced, and the positioning points of a main grid correspond to datum points of a fine grid, so that the printing precision is improved, and the printing broken grids are reduced through the structural design of the intersection positions.

Description

Technical field [0001] The invention relates to the technical field of solar battery manufacturing, more specifically to a solar battery printing screen and its printing process. Background technique [0002] Solar cells can convert the sun’s light energy into electrical energy, and this conversion does not produce any polluting substances. Therefore, the related applications of solar cells have gradually received attention. The process efficiency of conventional photovoltaic cells has been approaching the theoretical efficiency, and the efficiency has become more and more At the same time, the industry is facing a new round of reforms, gradually shifting to intensification and scale. Competition in the industry is increasing. High quality and low cost are the only way to gain a foothold in the market. For photovoltaic industry battery manufacturing, positive silver consumption Taking the first place in battery non-silicon production cost, reducing the consumption of silver paste...

Claims

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Application Information

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IPC IPC(8): B41F15/36B41M1/12H01L31/18H01L31/05
CPCB41F15/36B41M1/12H01L31/18H01L31/0504Y02E10/50Y02P70/50
Inventor 崔宁杨立友贾慧君冯强张伟王裕李文敏刘学飞和青青
Owner 晋能光伏技术有限责任公司
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