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Passivation adhesive, passivation method and passivation equipment

A silicon oxide and catalyst technology, applied in the field of solar photovoltaics, can solve the problems of poor wettability, long reaction time, and easy cracking of the passivation layer

Active Publication Date: 2020-07-14
LONGI SOLAR TECH (TAIZHOU) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The invention provides a passivation glue, a passivation method and a passivation equipment, aiming to solve the problems of long reaction time for forming a passivation layer on the cutting surface of a cell, poor wettability of the passivation layer, and easy cracking

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  • Passivation adhesive, passivation method and passivation equipment
  • Passivation adhesive, passivation method and passivation equipment
  • Passivation adhesive, passivation method and passivation equipment

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Embodiment Construction

[0046]The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0047] An embodiment of the present invention provides a passivation glue, which is used to passivate the cut surface of a battery sheet. The cutting surface may be a fracture surface formed during the splitting process of the battery sheet, or the like. The above cut surface will introduce a large number of lattice defects, such as lattice dislocations, dangling bonds, etc., and the above defects will lead to a substantial increase in the recombination...

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Abstract

The embodiment of the invention provides a passivation adhesive, a passivation method and passivation equipment, and relates to the technical field of solar photovoltaics. The passivation adhesive comprises a silicon oxide precursor solution, and 3-10 g of ascorbic acid powder and 90-100 g of thiourea are added into each liter of the silicon oxide precursor solution to form the passivation adhesive, wherein the silicon oxide precursor solution comprises tetraethyl orthosilicate, methyltriethoxysilane, an acid-base catalyst, a tetraethyl orthosilicate solvent and deionized water; in the siliconoxide precursor solution, the mass percent of the acid-base catalyst is less than 1%, and the mass percent of the tetraethyl orthosilicate, the mass percent of the methyltriethoxysilane, the mass percent of the tetraethyl orthosilicate solvent and the mass percent of the deionized water are 4%-10%, 2%-5%, 50%-65% and 10%-15% respectively. According to the passivation adhesive, the reaction time for forming the SiO2 passivation layer is shortened, the wettability of the SiO2 passivation layer is improved, the SiO2 passivation layer is not prone to cracking, the thickness of the SiO2 passivation layer is large, and a good passivation effect on a cutting face is achieved.

Description

technical field [0001] The invention relates to the field of solar photovoltaic technology, in particular to a passivation glue, a passivation method and passivation equipment. Background technique [0002] Slicing the battery sheet to obtain multiple sub-slices, and the use of sub-slice interconnection is beneficial to reduce power loss, but slicing the battery sheet will also introduce cutting efficiency loss. In order to reduce the cutting efficiency loss, the cutting surface needs to be passivated. [0003] At present, the passivation treatment on the cutting surface is mainly to provide a passivation glue on the surface of the cell to form a passivation layer on the cutting surface. [0004] The passivation glue in the prior art takes a long time to form a passivation layer, and the passivation layer has poor wettability and is easy to crack. Contents of the invention [0005] The invention provides a passivation glue, a passivation method and a passivation device, a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L31/0216H01L31/18C09D1/00
CPCH01L31/02167H01L31/1868C09D1/00Y02E10/50
Inventor 袁陨来卫志敏王建波朱琛吕俊
Owner LONGI SOLAR TECH (TAIZHOU) CO LTD