Solar cell piece welding strip automatic cleaning and flux smearing method and device

Abstract

The invention discloses a solar cell piece welding strip automatic cleaning and flux smearing method and device and relates to solar cell pieces. The device is provided with a box, a welding strip cleaner, a flux smearing unit and a welding strip drying unit. The welding strip cleaner is provided with a box cover, cleaning cotton and a box cover support. The flux smearing unit is provided with a left short rod fixing pulley, a right short rod fixing pulley, a long rod fixing pulley, a flux containing box, pulley fasteners, a flux containing box cover and a box cover pull hand. The welding strip drying unit is provided with a drying heat blowing fan, a welding strip outlet and a ventilating outlet. According to the method, the welding strip is laid according to a path and sequentially penetrates through the welding strip cleaner, the flux smearing unit and the welding strip drying unit; a locking mechanism is fastened, ethyl alcohol is injected; the length of the long rod fixing pulley is adjusted to the longest; the flux containing box cover is closed; the heating temperature and flow air speed of the welding strip drying unit are adjusted; and a series welding machine unit is started, and all defect rates of cell piece welding are counted.

Description

technical field [0001] The invention relates to solar cells, in particular to a method and a device for automatic cleaning of solar cell ribbons and application of flux, which are suitable for multi-grid solar cell automatic stringers. Background technique [0002] The world is facing energy depletion and the heavy use of traditional energy has caused serious pollution to the environment, which is the main constraint factor for national economic and social development. In order to benefit future generations and the sustainable development of mankind, governments of all countries are busy adjusting the energy structure and vigorously developing renewable energy. energy. Therefore, clean energy such as solar energy and wind energy has attracted worldwide attention. [0003] The application of solar photovoltaic technology and solar cells has made the world see the dawn. Among them, crystalline silicon components are the process link in the development of solar cells, and the ...

AI Technical Summary

Problems solved by technology

The existing welding machine winds the welding ribbon into a circle, and lays the welding ribbon between the grid lines through the robot for welding, but the welding ribbon itself will bring some dirt, such as some fine particles between the welding ribbon and the battery sheet. Splinters and hidden cracks are produced; moreover, the spraying method of the existing welding machine is to spray the flux on the front and back of the cell, which will increase the probability of cell defects (such as dirt, shading, light decay) and affect It is beautiful, and the spraying method makes the mechanical structure complex and increases the cost, and the corrosiveness of the flux will cause corrosion and aging of the mechanical parts

[0007] Some other improved flux spraying methods also have certain limitations and disadvantages, such as the interconnection flux device disclosed in Chinese patent CN202607032 U, which is applied to the automatic stringer of solar cells, adopts the method of immersing the interconnection strip with flux, Although the flux spraying device is eliminated, there are some defects: the semicircular stainless steel support roller causes the deviation of the ribbon conveying track to be indefinite, the flux is not protected, it is easy to be polluted and it is easy to corrode the mechanical device, and it is not suitable for multi-bar Wire cell welding, and the drying and ventilation facilities are not very clear; therefore, this kind of device is not suitable for large-scale promotion and use

[0008] There are also defects and limitations in the current interconnection strip cleaning tools. For example, the TI stringer interconnection strip cleaning tool disclosed in Chinese patent CN204602671U adopts a new sponge cleaning ribbon device at the bottom of the stringer. This method is attached to the stringer and Without an independent device, the sticky substance on the ribbon cannot be removed, so this device cannot be widely promoted and used

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