Glass powder for main gate electrode silver paste of TOPCon battery as well as preparation method and application of glass powder

A busbar electrode and glass powder technology, which is applied in glass manufacturing equipment, glass furnace equipment, conductive materials dispersed in non-conductive inorganic materials, etc., can solve the problems of poor solderability, poor wettability of aluminum and lead-tin solder strips, Reliability discount and other issues, to achieve the effect of low lap resistance and high aging adhesion characteristics

Pending Publication Date: 2022-04-12
ZHEJIANG GUANGDA ELECTRONICS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The common problem at present is that most of the silver paste on the front of TOPCon battery uses silver-aluminum paste (the addition of aluminum is indispensable), and the wettability of aluminum and lead-tin solder strips will Extremely poor, even can't be welded, which greatly reduces the reliability of components for long-term use

Method used

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  • Glass powder for main gate electrode silver paste of TOPCon battery as well as preparation method and application of glass powder
  • Glass powder for main gate electrode silver paste of TOPCon battery as well as preparation method and application of glass powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-5

[0044] Step 1. Glass powder is prepared according to the following steps:

[0045] (1) According to Table 1, the raw materials of the main glass powder and the auxiliary glass powder are respectively placed in a three-dimensional mixer and mixed evenly;

[0046] (2) Place the uniformly mixed raw materials in an alumina crucible, and melt at 1300°C for 60 minutes;

[0047] (3) Use a double-roll mill to roll the melted glass melt into flakes, use a pulverizer to pulverize the rolled glass flakes, and then use a vibrating sieving machine to sieve the pulverized glass powder. Grinding, polishing and grading the vibrating and sifted glass powder to obtain the required main glass powder and auxiliary glass powder.

[0048] Step 2. The busbar silver paste is prepared according to the following steps:

[0049] (1) take the butyl carbitol of solvent 10% by mass percentage, with 33% butyl carbitol acetate, 14% diethylene glycol dibutyl ether, 15% tripropylene glycol monomethyl ether, ...

Embodiment 6

[0056] Other steps are identical with embodiment 1, and difference only is that solvent is a single alcohol fat twelve.

Embodiment 7

[0058] Other steps are the same as in Example 1, except that the solvent is a single diethylene glycol dibutyl ether.

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Abstract

The invention relates to glass powder for crystalline silicon solar TOPCon battery main gate electrode silver paste, which is characterized by comprising main glass powder and auxiliary glass powder, the main glass powder is Pb-Si-Ti-Zn oxide, the auxiliary glass powder is Bi-Si-Mn-Cu oxide, and the main glass powder accounts for 60-90 wt%; the particle size D50 of the main glass powder and the auxiliary glass powder is smaller than or equal to 4 micrometers. After the main glass powder and the auxiliary glass powder are matched, the main grid silver paste is not sensitive to the change of the sintering temperature, so that the main grid silver paste has a wider sintering window, and the use of main grid electrodes on the front surface and the back surface of a crystalline silicon solar TOPCon battery can be met at the same time.

Description

technical field [0001] The invention relates to the field of crystalline silicon solar cells, in particular to a glass powder for silver paste of front electrode of crystalline silicon solar TOPCon cells and its application. Background technique [0002] As of the end of 2020, the total installed capacity of electric power in the country is about 2.2 billion kilowatts, and the cumulative installed capacity of wind and solar exceeds 530 million kilowatts, accounting for as much as 24%. The 2030 goal is that the total installed capacity of light and wind should reach 1.2 billion kilowatts, that is, double within 10 years. The installed capacity of 530 million kilowatts of wind and solar power generation was completed in about 15 years. Although the current production capacity, technology, and industrial chain are more mature and complete, there are still difficulties in realizing it. It is particularly important to improve the conversion efficiency of crystalline silicon sola...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C12/00C03B5/16H01B1/16H01B1/22H01L31/0224
Inventor 谢继峰许吉林陈卫龙卢波程晨琛苏正鹏杨博
Owner ZHEJIANG GUANGDA ELECTRONICS TECH
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