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Method for preparing photovoltaic cell piece fine grid electrode by laser sintering metal wire

A technology of metal wires and photovoltaic cells, which is applied in photovoltaic power generation, circuits, electrical components, etc., can solve the problems that the ability to collect current needs to be improved, and achieve the effects of good compactness, reduced shading area, and saving materials

Inactive Publication Date: 2019-09-06
JIANGSU OUDAFENG NEW ENERGY TECH DEV CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, although a part of the electrode material is saved, the ability to collect current needs to be improved

Method used

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  • Method for preparing photovoltaic cell piece fine grid electrode by laser sintering metal wire

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Embodiment Construction

[0020] A preferred embodiment of the present invention will be described in detail below in conjunction with the accompanying drawings. However, the scope of protection of the present invention is not limited to the following examples, that is, any simple equivalent changes and modifications made based on the patent scope of the present invention and the content of the description are still within the scope of the patent of the present invention.

[0021] refer to figure 1 , a kind of laser sintering metal wire according to the present invention prepares the method for fine grid line electrode of photovoltaic cell sheet, comprises the following steps:

[0022] Step 1, prepare specific metal wires, such as pure silver wires with a diameter of 30 microns, and use a jig to make a row of metal wires, and the spacing between the metal wires is determined according to the specifications of the fine grid wires;

[0023] Step 2, paste the above-mentioned row of metal wires on the sur...

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Abstract

The invention discloses a method for preparing a photovoltaic cell piece fine grid electrode by laser sintering metal wire. A metal wire is used as a fine grid electrode material of a photovoltaic cell, and a traditional silk-screen printing method is substituted. The method comprises the steps of pasting the metal wire onto a surface of the photovoltaic cell, and fixing two ends by silver paste;scanning the metal wire by a laser so that the metal wire is molten and sintered; and forming the fine grid electrode on a surface of the cell piece. The photovoltaic cell piece fine grid electrode prepared by the method is wide in material type range and can be silver, copper, aluminum and the like, the width of the grid electrode is smaller, the material compactness of the grid electrode is good, and the bonding strength with a battery surface is high after laser sintering and melting.

Description

technical field [0001] The invention belongs to the field of solar photovoltaic cells, and in particular relates to a method for preparing thin grid wire electrodes of photovoltaic cells by laser sintering metal wires. Background technique [0002] The grid electrode is the most important structure and material in photovoltaic cells at present, and its main function is to collect the current of photovoltaic conversion. Common front grid line electrodes include main grid lines, auxiliary grid lines and thin grid lines, the widths of which decrease in order. Currently, the most mainstream processing method for grid electrodes is screen printing. In order to improve the energy conversion efficiency of photovoltaic cells and reduce processing costs, it is necessary to improve the screen printing technology. At present, it mainly includes reducing the width and thickness of the fine grid lines, thereby reducing the light-shielding area of ​​the grid line electrodes and the mate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L31/0224
CPCH01L31/022425Y02E10/50
Inventor 朱学林
Owner JIANGSU OUDAFENG NEW ENERGY TECH DEV CO LTD
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