Porous current collector metal material continuous processing method

Abstract

A porous current collector metal material continuous processing method comprises a to-be-processed long-strip flexible sheet-shaped metal material is allowed to maintain a continuous conveying state in a specific time; an optical fiber laser is utilized to cooperate with galvanometer operation, so that preset positions on the metal material can be controlled to be subjected to perforation processing; followed by, the metal material after perforation is allowed to pass through an acid solution to be subjected to electroetching processing, so that a roughening structure is formed on the surface of the metal material; then the surface of the metal material is subjected to antioxidant processing, so that a coating layer for preventing oxidation is formed and then dried; and finally, the metal material with the surface having the active material is directly rolled up or conveyed to a next procedure.

Description

technical field [0001] The invention relates to a continuous processing method of a porous current collector metal material, in particular to a metal material processing method with simple processing, flexible production and low environmental protection treatment cost. Background technique [0002] With the advancement of various material technologies, the structure of metal current collectors (aluminum foil, copper foil) used in lithium-ion batteries (LiB), lithium-ion capacitors (LiC) and supercapacitors has also undergone tremendous changes. [0003] Since the function of the above-mentioned metal current collector is to conduct the external output current (lithium-ion battery, lithium-ion capacitor and super capacitor), its structure must meet the basic characteristics of low internal resistance (and easy penetration of ions), and in order to meet The above-mentioned demand characteristics, the more common practices are as follows: [0004] 1. The metal flake (aluminum ...

AI Technical Summary

Problems solved by technology

[0007] a. Utilizing a mold equipped with pins, the preset holes can be directly punched out on the sheet metal material through the drive of the stamping machine. Although this processing method is relatively simple and fast; A raised burr will be formed (the height of the burr is generally larger than the thickness of the material coated on the surface of the metal sheet material, so it is easy to cause a short circuit), forming a structural defect, and is limited by the clamping of each pin in the mold The space occupied by the holding and positioning structure requires an appropriate minimum distance and space between the pins. Therefore, the arrangement of the pins cannot meet the denser requirements. At the same time, using the pins to directly punch through the sheet metal material is also It will cause rapid wear of the pins, and the operation of replacing the pins is not only extremely cumbersome, but also greatly increases the production cost, which is not in line with economic benefits

[0008] b. Use (silk) screen printing to print UV ink on the metal sheet material, and corrode and perforate the unprinted part after photosensitive, and then remove the UV ink; although this processing method is conducive to mass production, but due to screen printing Due to technical limitations, in the process of screen printing with small aperture, it is easy to cause mesh blockage and cause adverse conditions, resulting in a high failure rate in the process of small aperture perforation. Furthermore, the use of the UV ink and Disposal will also increase the cost of follow-up treatment and environmental protection burden

[0009] In addition to the above comparison content, the needle nail and screen printing processing methods are limited by the positioning method and are only suitable for single-piece processing with a fixed area at a time, and cannot perform continuous processing of roll-to-roll or other continuous conveying, resulting in The (single-chip) finished products produced by it are also limited in application (it is easy to generate more waste, and its processing and production are also easy to stop and not sustainable), resulting in a lack of application

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