Method for measuring temperature of melted tin during welding of battery film

A cell welding and measurement method technology, applied in the application of thermometers, thermometers, measuring devices, etc., can solve the problems of small thermal conductivity and inconsistent formation temperature of measuring alloy layers, and achieve the effect of reducing exploration time

Inactive Publication Date: 2012-02-08
TRINA SOLAR CO LTD
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  • Abstract
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Problems solved by technology

Due to the relatively small thermal conductivity of silicon and the thinner metallization layer (generally 1-2μm intermetallic layer), there is no uniform method for measuring the formation temperature of the alloy layer.

Method used

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  • Method for measuring temperature of melted tin during welding of battery film
  • Method for measuring temperature of melted tin during welding of battery film

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Embodiment Construction

[0008] A method for measuring the temperature of battery sheet welding melting tin, which involves drilling 2 to 3 through holes on the surface of the battery substrate, using a temperature sensor element, one end of which is embedded in a pre-processed through hole and fixed with a thermally conductive colloid Connect the temperature transmission device, and reflect the dynamic process of temperature change in the welding process through the output of temperature data in the temperature transmission device.

[0009] Methods for data analysis and quality problem characterization:

[0010] figure 1 It is the data output in the temperature variable speed device. It can be seen that the temperature of the soldering iron is gradually decreasing. When welding the first solder joint, the temperature has a downward trend, and the temperature downward trend is obvious during continuous welding. The data show that the tin-lead binary alloy The eutectic point is about 183°C. According ...

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Abstract

The invention relates to a method for measuring the temperature of melted tin during welding of a battery film, which comprises the following steps that: 2-3 through holes are punched in the surface of a battery film, temperature sensor elements are adopted, one ends of the temperature sensor elements are embedded into the pre-processed through holes and are fixed by heat conduction colloid materials, the other ends of the temperature sensor elements are connected with a temperature transmission device, and a dynamic process of temperature variation in a welding process is reflected through the output of temperature data in the temperature transmission device. The method provided by the invention has the beneficial effects that: time for exploring the best technological parameter during the welding of the battery substrate is shortened, the potential welding quality can be represented, and the best welding technology window can be searched favorably.

Description

technical field [0001] The invention relates to a method for measuring the temperature of battery sheet welding melting tin. Background technique [0002] Microscopic cracks in delicate solar cell substrates are common defects that can occur during photovoltaic tinning and leveling soldering. Due to the difference in the thermal expansion coefficient of copper and silicon, and this difference is more obvious at the welding temperature above 300 ° C, the measurement of the surface temperature of the battery substrate is useful for formulating process parameters and reducing mechanical or thermal stress during welding. The effect of the solar cell substrate is significant. Since the thermal conductivity of silicon is relatively small, and the metallization layer for soldering is relatively thin (generally 1-2 μm intermetallic layer), there is no uniform method for measuring the formation temperature of the alloy layer. Contents of the invention [0003] The technical probl...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01K13/12
Inventor 许贵军万青宣鑫保晓霞
Owner TRINA SOLAR CO LTD
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