Photovoltaic module welding quality measurement device and method for quality inspection using the device

Abstract

The invention discloses a photovoltaic assembly welding quality measurement device and a method for performing quality detection by applying the same, and relates to the technical field of a detection method for solar batteries. The method comprises the steps of performing equivalence on voltage and current values at a dry joint of an assembly through additionally arranging a current source for the assembly, performing multiple steps of adjustment on the device and a sampling element, enabling welding impedance of the assembly to be equivalent to an external circuit, sampling corresponding equivalent voltage and current, calculating a dry joint impedance value of the assembly, thus judging the welding quality of the assembly, and acquiring whether the assembly has a dry joint or not. The method disclosed by the invention does not damages the photovoltaic assembly, and is simple to operate, convenient to use, safe and reliable.

Description

technical field [0001] The invention relates to the technical field of detection methods for solar cells, in particular to a photovoltaic module welding quality measurement device and a quality detection method using the device. Background technique [0002] At present, the characteristics of photovoltaic modules and junction boxes are: the usual photovoltaic modules are solar cells welded in series with photovoltaic ribbons and busbars, and then packaged with glass, EVA, backplane, frame and other materials, and then connected through junction boxes, Lead out the positive and negative poles of the battery. During the battery welding process, there are phenomenon of virtual welding and missing welding. Due to the characteristics of the solar cell itself, "the output has a certain voltage and current when it is exposed to light, and it increases with the increase of the light intensity", so the quality of the internal welding cannot be directly detected by instruments such a...

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Problems solved by technology

[0023] 3. "Patent No.: 201210192248.3 A Method for Testing the False Soldering of Junction Boxes of Solar Cell Modules" is a destructive test, which ages the virtual solder joints in advance and becomes an open circuit. The heating time of the test is longer, which is actually a qualitative judgment. Not a test of solderability

[0024] 4. "Patent No.: 200510108131.2 Device and Test Method for Testing Pin Welding", "Patent No.: 02122318.1 Multimeter Test for Welding and Short Circuit Failure" cannot be used for component testing

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