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Method for connecting metal electrode of solar cell with photovoltaic welding strip

A technology for solar cells and metal electrodes, which is applied in the field of solar cells, can solve the problems of difficult connection between the metal poles and wires of solar cells, low connection resistance, etc., and achieves the effects of low cost, small connection resistance and convenient operation.

Inactive Publication Date: 2019-01-01
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In view of the above technical problems, the purpose of the present invention is to provide a method for realizing the connection between the metal electrode of the solar cell and the photovoltaic ribbon, so as to solve the problem in the prior art that it is difficult to realize the connection between the metal pole of the solar cell and the wire by general welding. question
[0009] According to the present invention, the conductive adhesive material and the hot-press bonding process can be used to effectively electrically connect the photovoltaic ribbon to the metal electrode of the solar cell. This method can not only solve the problem that it is difficult to realize the metal counter electrode of the solar cell and the wire through the general welding method. The problem of connection, and the connection resistance between the metal electrode and the photovoltaic ribbon is very small, which will not cause the internal resistance of the battery to increase and cause the battery efficiency to decrease. At the same time, it is more suitable for large-scale production under the premise of ensuring battery efficiency.

Method used

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  • Method for connecting metal electrode of solar cell with photovoltaic welding strip
  • Method for connecting metal electrode of solar cell with photovoltaic welding strip
  • Method for connecting metal electrode of solar cell with photovoltaic welding strip

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Effect test

Embodiment 1）

[0035] First, the Anisotropic Conductive Film (ACF) is attached to the metal electrode of the solar cell by using a thermal compression lamination equipment. Among them, the width of the ACF adhesive film is 1.2 mm, the thickness is 20 μm, and the feeding length is 117 mm; the hot-pressing temperature is 140 ° C, and the time is 10 s.

[0036] Then, attach a photovoltaic ribbon (tin-coated copper ribbon in this embodiment) with a length of 150 mm, a width of 1.6 mm, and a thickness of 0.25 mm on the above-mentioned ACF adhesive film. Subsequently, the solar cell with the ACF and the photovoltaic ribbon attached was placed in a hot-press laminating equipment for hot-press bonding. The hot-press temperature was 160° C. and the hot-press time was 30 s.

[0037] Then, solder the photovoltaic ribbon soaked in flux to the silver wire printed on the FTO of the battery with an electric soldering iron. In the above-mentioned solar cells, the tinned copper strip bonded by ACF and titaniu...

Embodiment 2）

[0040] First, the Anisotropic Conductive Film (ACF) is attached to the metal electrode of the solar cell by using a thermal compression lamination equipment. Among them, the width of the ACF film is 1.0 mm, the thickness is 20 μm, and the feeding length is 117 mm; the hot-pressing temperature is 140 ° C, and the time is 10 s.

[0041] Then, attach a photovoltaic ribbon (tin-coated copper ribbon in this embodiment) with a length of 150 mm, a width of 1.6 mm, and a thickness of 0.25 mm on the above-mentioned ACF adhesive film. Subsequently, the solar cell with the ACF and the photovoltaic ribbon attached was placed in a hot-press laminating equipment for hot-press bonding. The hot-press temperature was 190° C. and the hot-press time was 10 s.

[0042] Then, solder the photovoltaic ribbon soaked in flux to the silver wire printed on the FTO of the battery with an electric soldering iron. In the above battery, the tinned copper strip bonded by ACF and titanium foil is the positiv...

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Abstract

The invention aims to provide a method for connecting a metal electrode of a solar cell with a photovoltaic welding strip. The method comprises a first procedure in which a conductive adhesive material is arranged on the metal electrode of the solar cell; a second procedure in which the photovoltaic welding strip is attached to the conductive adhesive material on the metal electrode; and a third procedure in which hot-pressing bonding is performed on the photovoltaic welding strip, the conductive adhesive material and a metal substrate by adopting a hot-pressing device with heating and pressurizing functions. According to the invention, the photovoltaic welding strip can be electrically connected with the metal electrode of the solar cell effectively by adopting the conductive adhesive material and the hot-pressing laminating process, and the problem that it is difficult to realize the connection between the metal electrode of the solar cell and a wire through a general welding methodcan be solved according to the method.

Description

technical field [0001] The invention relates to the technical field of solar cells, in particular to a method for connecting metal electrodes of solar cells and photovoltaic welding strips. Background technique [0002] With the rapid development of science and technology and the continuous progress of human civilization, human beings have begun to seek renewable new energy sources that can replace fossil fuels such as coal, oil, and natural gas. Solar energy has been continuously researched and developed in the past century for its advantages of abundance, cleanliness, convenience and longevity. Dye-sensitized solar cells (DSSC) are the third generation of solar cells, with abundant raw materials, low cost, relatively simple process technology and non-toxic The advantages of no pollution have gradually become a research hotspot. [0003] In 1991, Grätzel of the Swiss Federal Institute of Technology in Lausanne and his research group introduced nanocrystalline porous films ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L31/18H01L21/603
CPCH01L31/1876H01L21/603Y02E10/50Y02P70/50
Inventor 陈薪羽沈沪江
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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