Photovoltaic pre-coating material, pre-coated solder strip and preparation methods thereof

A pre-coating, photovoltaic technology, applied in photovoltaic power generation, rosin coatings, coatings, etc., can solve problems such as environmental pollution, damage, regular cleaning of welding equipment parts, etc., to reduce manufacturing costs and increase solder wettability.

Inactive Publication Date: 2020-04-21
WUXI SVECK TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Existing solar cells need to use a lot of welding ribbons (also called tin-coated copper strips, MBB round wires) in the process of connecting each other in series and parallel to collect and output the current generated by solar cells under sunlight. During the solar cell welding process, it is necessary to apply liquid flux in the welding equipment or separately, and then bake the solvent to volatilize and then leave activator, rosin and other modifiers to better bond the soldering ribbon to the solar cell, helping The flux is easy to volatilize and crystallize during soaking and smearing, and the flux needs to be replaced after a period of use. The flux volatilizes into the air and pollutes the surrounding environment. After the flux crystallizes, it needs to be cleaned regularly on the welding equipment, otherwise it is easy to cause welding. Damage to equipment parts, flux is flammable and has high protection requirements for storage, and the waste liquid after replacement needs to be disposed of by a professional disposal organization

Method used

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  • Photovoltaic pre-coating material, pre-coated solder strip and preparation methods thereof
  • Photovoltaic pre-coating material, pre-coated solder strip and preparation methods thereof
  • Photovoltaic pre-coating material, pre-coated solder strip and preparation methods thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] (1) Send the strip-shaped pure copper base material into a high-speed tinning machine for tinning to obtain a pure copper tinned base material;

[0030] (2) Put the photovoltaic pre-coating material into the coater, and keep the temperature of the coater at 100°C to prepare for the next step;

[0031] (3) Put the pure copper tinned base material obtained in step (1) into the coating machine described in step (2), carry out the coating of photovoltaic pre-coating material to the tinned base material, and slowly Bake until dry, and finally prepare a strip-shaped pre-coated welding strip. The cross-sectional view of the prepared ribbon is shown in figure 1 .

[0032] Among them, the preparation method of the photovoltaic pre-coating material is as follows: 41% of hydrogenated rosin and 30% of maleic rosin are mixed, heated and melted at a temperature of 100°C, then 10% of rosin resin is added and heated, melted and stirred, and then succinic acid 9 % and stir evenly, th...

Embodiment 2

[0034] (1) sending the triangular copper-silver alloy base material into a high-speed tinning machine for tinning to obtain a copper-silver tinned base material;

[0035] (2) Put the photovoltaic pre-coating material into the sprayer, and keep the temperature of the sprayer at 130°C to prepare for the next step;

[0036] (3) Put the copper-silver tin-plated base material obtained in step (1) into the spraying machine described in step (2), carry out the wind knife blowing of photovoltaic pre-coating material to the tin-plated base material, and under 90 ℃ Slowly roast until dry, and finally prepare a triangular pre-coated welding strip. The cross-sectional view of the prepared ribbon is shown in figure 2 .

[0037] Among them, the preparation method of the photovoltaic pre-coating material is: mix 45% of hydrogenated rosin and 25% of maleic rosin, heat and melt, and the melting temperature is 125°C, then add 12% of rosin resin and heat, melt and stir, and then add succinic ...

Embodiment 3

[0039] (1) sending the round wire-shaped copper-nickel alloy base material into a high-speed tinning machine for tinning to obtain a copper-nickel tin-plated base material;

[0040] (2) Put the photovoltaic pre-coating material into the sprayer, and keep the temperature of the sprayer at 155°C to prepare for the next step;

[0041] (3) Put the copper-nickel tin-plated base material gained in step (1) into the spraying machine described in step (2), carry out the wind knife blowing of photovoltaic pre-coating material to the copper-nickel tin-plated base material, and rapidly After cooling and drying, a round wire-shaped precoated welding strip is finally prepared. The cross-sectional view of the prepared ribbon is shown in image 3 .

[0042] Among them, the preparation method of the photovoltaic pre-coating material is as follows: 47% of hydrogenated rosin and 20% of maleic rosin are mixed, heated and melted, and the melting temperature is 150°C, then 15% of rosin resin is ...

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Abstract

The invention provides a photovoltaic pre-coating material, a pre-coated solder strip and preparation methods thereof, and belongs to the technical field of photovoltaic new energy. The photovoltaic pre-coating material comprises hydrogenated rosin, maleated rosin, rosin ester, succinic acid, glutaric acid and adipic acid; the preparation method comprises the following steps: mixing and heating hydrogenated rosin and maleated rosin, sequentially adding rosin ester, succinic acid, glutaric acid, adipic acid and tetracosanoic acid, stirring, mixing and melting to obtain the photovoltaic pre-coating material. The pre-coated solder strip comprises a base body, a tin coating and the photovoltaic pre-coating material. The preparation method of the pre-coated solder strip comprises the followingsteps: sending the base material into a high-speed tinning machine for tinning so as to obtain a tinned base material; putting the photovoltaic pre-coating material into a coating machine or a spraying machine; putting the tinned base material into the coating machine or the spraying machine, coating the tinned base material with the photovoltaic pre-coating material or blowing the tinned base material with an air knife, and slowly baking the tinned base material until the tinned base material is dry or rapidly cooling at a low temperature to prepare the pre-coated solder strip. The process issimple in process, the cost investment is low, and the material of the invention belongs to an environment-friendly material.

Description

technical field [0001] The invention belongs to the technical field of photovoltaic new energy, and in particular relates to a photovoltaic precoating material, a precoating welding strip and a preparation method thereof. Background technique [0002] Solar cells are a very promising new power source. Solar cells are devices that directly convert light energy into electrical energy through the photoelectric effect or photochemical effect. [0003] Existing solar cells need to use a lot of welding ribbons (also called tin-coated copper strips, MBB round wires) in the process of connecting each other in series and parallel to collect and output the current generated by solar cells under sunlight. During the solar cell welding process, it is necessary to apply liquid flux in the welding equipment or separately, and then bake the solvent to volatilize and then leave activator, rosin and other modifiers to better bond the soldering ribbon to the solar cell, helping The flux is e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D193/04C09D7/63H01L31/05
CPCC08K2201/014C08L2205/025C08L2205/03C09D193/04C09D7/63H01L31/0512C08L93/04C08K5/09C08K5/092Y02E10/50
Inventor 程中广叶光武
Owner WUXI SVECK TECH
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