Precise transverse cutting knife and cutting method for flexible thin-film solar battery

Abstract

The invention discloses a precise transverse cutting knife and a cutting method for a flexible thin-film solar battery, which are characterized in that the cutting of a thin-film battery is commonly completed by an upper knife and lower knives; the upper knife is an inclined-blade transverse cutting knife; the cross section of a cutting edge is V-shaped; the upper knife forms an upper knife cutting edge for shearing type cutting together with the cutting edge of the lower knife in a point contact way; the two lower knives define a slit in the splayed shape; the edges of the slit are respectively a lower-knife cutting edge which is in the type of a flat straight line; the slit gap is exactly and finely tuned by using a micrometer caliper. According to the precise transverse cutting knife and the cutting method, the nondestructive cutting to a functional layer of the flexible thin-film battery can be realized through precise adjustment on position, cutting speed and the like; therefore the problem of battery short-circuit caused by cutting is solved.

Description

technical field [0001] The invention relates to the field of solar cell preparation, in particular to a precision cross-cutting knife and a cutting method for a flexible thin-film solar cell. Background technique [0002] In recent years, demand for flexible and light-weight thin-film solar cells has increased as the demand for portable products has increased. Flexible thin-film solar cells are usually produced by a roll-to-roll process. During the production process, the rolled flexible thin-film solar cells need to be cut longitudinally and then cross-cut. When the flexible thin film solar cell is directly cut across by a cutter, it will cause a short circuit of the flexible thin film solar cell. [0003] When cutting, the upper blade touches the TCO (transparent conductive oxide) material on the upper surface of the flexible thin film solar cell, and the lower blade touches the lower surface of the substrate (as shown in Figure 2 and image 3 shown). As the depth of bla...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problem that the cross-cutting knife and cutting method in the prior art cannot cross-cut flexible thin-film solar cells without short circuit, resulting in short-circuit and efficiency attenuation of flexible thin-film solar cells, the present invention provides a precision cutting method for non-short-circuit flexible thin-film solar cells. The cross-cut knife and cutting method have the advantages of strong compatibility. Both amorphous silicon thin-film solar cells and compound thin-film solar cells can be cut, and the structure is simple, easy to operate, easy to maintain, energy-saving and environmentally friendly.

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