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Solar cell and method for making grid electrode

A technology of solar cells and manufacturing methods, which is applied in the manufacture of circuits, electrical components, and final products, and can solve the problems that the thickness and width of grid wire electrodes cannot be accurately controlled, cannot be completed at one time, and the temperature of the production environment is high. Achieve the effects of improved light conversion efficiency, simple manufacturing method, and reduced production cost

Active Publication Date: 2016-06-29
福建钜能电力有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention provides a solar cell and a method for making grid wire electrodes thereof, so as to overcome the high production cost of grid wire electrodes, large waste of silver material, high production environment temperature, and the thickness of the prepared grid wire electrodes existing in the prior art. and the width cannot be well and accurately controlled, the product quality is not high, and the preparation of the grid line electrode cannot be completed at one time.

Method used

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  • Solar cell and method for making grid electrode
  • Solar cell and method for making grid electrode
  • Solar cell and method for making grid electrode

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Experimental program
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Effect test

Embodiment approach 1

[0033] Reference figure 1 , figure 2 , The manufacturing method of the grid electrode of the solar cell includes the following steps:

[0034] A. Mold mounting: press-fit a grid mold frame 2 corresponding to the required grid electrode on the surface of the battery sheet 1, and the bottom surface of the grid mold frame 2 is close to the surface of the battery sheet 1;

[0035] B. Coating: Fill the cavity of the grid mold frame 2 with a transparent insulating material, so that the surface of the cell 1 is evenly coated with a transparent insulating film layer 3, the thickness of the transparent insulating film layer 3 is 2-30 microns, more Specifically, the above-mentioned transparent insulating material is silica gel or insulating polymer material, and insulating polymer material such as EVA or PE or PET;

[0036] C. Demoulding: Remove the grid formwork 2 to form a grid line network exposed on the surface of the cell 1; if the grid electrode 4 is to be prepared on the other surfac...

Embodiment approach 2

[0040] Reference figure 1 , The manufacturing method of the solar cell grid electrode 4 includes the following steps:

[0041] A. Coating: A transparent insulating film layer 3 made of a transparent insulating material is uniformly coated on the surface of the battery sheet 1. The thickness of the transparent insulating film layer 3 is 2-30 microns. More specifically, the above-mentioned transparent insulating material is silica gel Or insulating polymer materials, insulating polymer materials such as EVA or PE or PET;

[0042] B. Drying: the transparent insulating film layer 3 is dried to consolidate the transparent insulating film layer 3 and the battery sheet 1; if the grid electrode 4 is also prepared on the other surface of the battery sheet 1, step After B is completed and before step C starts, repeat steps A and B on the other surface of the battery sheet 1 so that both surfaces of the battery sheet 1 are coated with a transparent insulating film layer 3;

[0043] C. Charact...

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Abstract

The invention discloses a solar cell and a method for producing a grid line electrode of the solar cell. The method for producing the grid line electrode is that a layer of transparent insulation material is coated or settled on a cell surface; the transparent insulation material on grid lines is removed through using a laser scribing method, a die pressing method, a dry / wet etching method and the like, and the grid lines are exposed; and a conducting material which is used as a grid line electrode is plated on the grid line through using a plating method. The method for producing the grid line electrode can form a circuit pattern of the grid line electrode at one time, so that the production efficiency is effectively improved, moreover, the production temperature can be indoor temperature, and the performance of a current generation body cannot be influenced; the method for producing the grid line electrode is relatively simple, does not have unnecessary steps, and the arranged transparent insulation material can well protect the cell, so that the product service life is prolonged; and the method for producing the grid line electrode can also relatively accurately control the thickness and the width of the grid line electrode, the material utilization rate is also high, and the production cost is relatively low.

Description

Technical field [0001] The invention relates to a manufacturing method of a solar cell and its electrode, in particular to a manufacturing method of a solar cell and its grid electrode. Background technique [0002] Reference image 3 The solar cell includes a solar cell that plays a basic supporting role and an electrode connected to the surface of the cell, and the current generated by the cell is led out through the electrode. In order to reduce the power loss, by reducing the path of the current, the electrodes of the solar cell are mostly grid electrodes with grid patterns. The grid electrodes include horizontally arranged sub-grid lines (finger) and longitudinally arranged bus grid lines. (busbar), the sub-grid line and the bus-bar line are cross-connected as a whole; the current generator absorbs sunlight and converts light energy into electrical energy, and the generated current is collected on the sub-bar line, and the sub-bar line collects the current in the vertical arr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L31/18H01L31/0224
CPCY02P70/50
Inventor 林朝晖王树林
Owner 福建钜能电力有限公司