Corrosion hole forming device for high-voltage aluminum electrolysis electronic aluminum foil

Abstract

The invention discloses a corrosion hole forming device for high-voltage aluminum electrolysis electronic aluminum foil. The corrosion hole forming device comprises two primary hole forming grooves, a support and a turn-over device. The support is divided into two layers, each layer is provided with one corresponding primary hole forming groove, and the turn-over device is arranged on the side face of the support. Each primary hole forming groove comprises an electrolyte tank body, at least two graphite pole plate sets which are vertically downward are arranged in each electrolyte tank body, and each graphite pole plate set is connected with a high-frequency switching power supply. Rollers used for guiding the aluminum foil to advance are also arranged in the electrolyte tank bodies. When the device is used for corrosion hole forming, the hole forming face of the aluminum foil is parallel to the bottom faces of the primary hole forming grooves, and therefore bubbles generated on the foil face and in holes of the aluminum foil during hole forming corrosion can be effectively discharged, accumulation of a large number of bubbles at the upper end of the aluminum foil can be avoided, finally, the hole forming distribution uniformity is improved, the hole diameter of the corrosion foil is increased, and therefore the capacity of the corrosion foil is improved.

Description

technical field [0001] The invention relates to the technical field of anode foil corrosion for aluminum electrolytic capacitors, in particular to a device for corroding and generating holes in high-voltage aluminum electrolytic electronic aluminum foil. Background technique [0002] High-capacity miniaturization is the development trend of aluminum electrolytic capacitors. Studies have shown that electrolytic etching of high-purity aluminum foil with {100} texture to expand its specific surface area and increase specific capacitance is the most effective technical approach for the miniaturization of aluminum electrolytic capacitors. [0003] The electrolytic corrosion process of high-voltage anode foil generally includes seven main steps: pre-treatment, porosity corrosion, intermediate treatment 1, hole expansion corrosion 1, intermediate treatment 2, hole expansion corrosion 2, and post-treatment (chemical cleaning). Among them, intermediate treatment and hole expansion c...

AI Technical Summary

Problems solved by technology

The bubbles generated in the holes during the traditional hole making process are difficult to discharge, and the bubbles trapped on the surface of the aluminum foil will not only affect the uniformity of the hole distribution and the consistency of the hole depth, but also cause hydrogen embrittlement, which will affect the finished product. Properties of electronic aluminum foil

Secondly, in the traditional electrolytic corrosion process, a large number of bubbles will be generated in the corrosion tank, and the upwelling of the bubbles will cause the liquid level to fluctuate, which will affect the corrosion effect of the upper end of the aluminum foil.

[0005] The patent No. CN201920698669.0 discloses a high-pressure corrosion foil reaction tank reaction bubble screening device. The device has a certain screening effect on a large amount of generated gas, but there are still a large number of bubbles accumulated on the upper end of the aluminum foil, which will cause liquid surface fluctuations

The patent No. ZL201711486915.8 discloses a power-on electrode device for aluminum foil electrolysis. control, but can not effectively discharge the air bubbles in the hole

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