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PERC battery back pole slurry and preparation method thereof

A back electrode and slurry technology, which is applied in the field of PERC battery back electrode slurry and its preparation, can solve the problems of health threats to production workers, pollution of the workshop environment, unstable product formula, etc., and achieve improved formula stability and uniform particle size Sex, reduce adverse effects, improve the effect of formulation stability

Active Publication Date: 2019-05-21
GUANGZHOU RUXING TECH DEV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] 3) Use a three-roll mill to produce PERC battery back electrode slurry. During the production process, the solvent volatilizes. On the one hand, the product formula is unstable. On the other hand, it will pollute the workshop environment and pose a certain threat to the health of production workers.

Method used

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  • PERC battery back pole slurry and preparation method thereof
  • PERC battery back pole slurry and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0033] An embodiment of a PERC battery back electrode slurry of the present invention, the PERC battery back electrode slurry includes the following components in weight percentage: 50% silver powder, 10% conductive filler, 3% glass powder, organic binder Agent 37%.

[0034] The silver powder described in this embodiment adopts spherical silver powder; the particle size is 100nm-3μm.

[0035] Described conductive filler selects the mixture that mass ratio is 1:1 graphene and carbon nanotube;

[0036] The glass powder is formed by reacting tetraethyl orthosilicate, triethyl phosphate, boric acid, zinc acetate, calcium citrate, and barium acetate in absolute ethanol, wherein tetraethyl orthosilicate: triethyl phosphate : Boric acid: zinc acetate, calcium citrate: barium acetate molar ratio is 10:15:20:35:5:15;

[0037] The organic binder consists of 80 wt% solvent, 15 wt% thickener and 5 wt% additives. The solvent in this example is alcohol ester twelve, the thickener is ethy...

Embodiment 2

[0043] The only difference between this example and Example 1 is that the preparation method of the PERC battery back electrode slurry is different, and the preparation method includes the following steps:

[0044] 1) Preparation of glass powder: put tetraethyl orthosilicate, triethyl phosphate, boric acid, zinc acetate, calcium citrate and barium acetate in total 9.6kg into a 100L reaction kettle according to the above molar ratio, add 60L Absolute ethanol was used as the reaction medium, stirred evenly, acetic acid was added to adjust the pH value of the solution to 5, and the stirring was continued for 2 hours, then reacted and aged at room temperature for 3 days, and the supernatant liquid was separated to obtain glass slurry. Place the glass slurry in a vacuum oven at 60°C for 5 hours, and then pulverize it to obtain glass powder;

[0045] 2) Preparation of organic binder: put solvent, thickener and additives in the reaction kettle in proportion, stir and melt at 110°C to...

Embodiment 3

[0048] The only difference between this example and Example 1 is that the preparation method of the PERC battery back electrode slurry is different, and the preparation method includes the following steps:

[0049] 1) Preparation of glass powder: 8 kg of tetraethyl orthosilicate, triethyl phosphate, boric acid, zinc acetate, calcium citrate and barium acetate are put into a 100L reaction kettle according to the above molar ratio, and 60L of Water and ethanol were used as the reaction medium, stirred evenly, acetic acid was added to adjust the pH value of the solution to 6.5, and the stirring was continued for 1 hour, then reacted and aged at room temperature for 4 days, and the supernatant liquid was separated to obtain glass slurry. Place the glass slurry in a vacuum oven at 75°C for 4 hours, and then pulverize it to obtain glass powder;

[0050] 2) Preparation of organic binder: put solvent, thickener and additives in the reaction kettle in proportion, stir and melt at 120°C...

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Abstract

The invention discloses a preparation of PERC battery back pole slurry. The preparation method comprises the steps of: 1) putting tetraethyl orthosilicate, triethyl phosphate, boric acid and organic metal salt in a reaction still in proportion, adding absolute ethyl alcohol as a reaction medium, uniformly stirring the materials, adjusting the PH value of the solution to 3.5-6.5, carrying out reaction and ageing at room temperature, separating the supernatant liquid to obtain glass slurry, and drying and grinding the glass slurry to obtain glass powder; 2) adding a solvent, a thickener and an additive in the reaction still in proportion, and carrying out stirring and fusion to form a uniform organic bond; and 3) adding silver powder, a conductive filling agent, the glass powder and the organic bond in a ball milling tank in proportion; adding a ball milling medium, carrying out grinding and dispersion on a ball mill for 6-7 hours, and separating the ball milling medium to obtain the PERC battery back pole slurry. The synthesized glass powder has favorable ingredient stability and granularity uniformity. According to the preparation method, the ingredient stability of the slurry is improved and the bad influences, on the workshop environment, of organic volatile matters generated in the production process are reduced.

Description

technical field [0001] The invention relates to the technical field of back electrode slurry, in particular to a PERC battery back electrode slurry and a preparation method thereof. Background technique [0002] The improvement of photoelectric conversion efficiency of solar cells is the core of the technological progress of the photovoltaic industry and the key to further reducing the cost of photovoltaic power generation and achieving grid parity as soon as possible. PERC battery technology can effectively improve the photoelectric conversion efficiency of solar cells, and has become one of the most concerned industrialized high-efficiency battery technologies at home and abroad. [0003] PERC cell technology, that is, passivated emitter back contact cell technology, improves conversion efficiency by forming a passivation layer on the back of crystalline silicon solar cells. The biggest difference between PERC batteries and conventional batteries is the passivation of the...

Claims

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Application Information

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IPC IPC(8): H01B1/22H01L31/0224C03C12/00C03C6/00
Inventor 欧阳洁瑜丁冰冰马进
Owner GUANGZHOU RUXING TECH DEV
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