阅读说明：本技术 一种箔式电子储能元器件制造工艺中分切毛刺的去除方法 (Method for removing slitting burrs in manufacturing process of foil type electronic energy storage component ) 是由 郎树杰 张岩 杨光 于 2019-08-23 设计创作，主要内容包括：本发明公开了一种箔式电子储能元器件制造工艺中分切毛刺的去除方法,包括以下步骤：(1)使用分切机按照电子元器件的设计要求分切出符合宽度的功能箔并收卷成片状；(2)优选为50w以上的光纤激光发生器产生的高功率密度激光束配合振镜对已经裁切卷绕成片状的功能箔端面在大气室温环境中照射；(3)激光束的聚焦点在分切端面上不高于焦距2mm,焦点设定优选线间距0.08mm,环间距0.5mm填充式移动；(4)对已经裁切卷绕成片状的功能箔端面全部进行一次照射扫描,可适当增加吸尘装置,避免产生的灰尘飞扬。本发明彻底解决了箔式电子储能元器件制造工艺中分切正负极箔边缘的金属毛刺的去除以及分切端面的氧化绝缘层的初步形成问题。(The invention discloses a method for removing slitting burrs in a foil type electronic energy storage component manufacturing process, which comprises the following steps of: (1) cutting functional foil meeting the width according to the design requirement of the electronic component by using a cutting machine and rolling the functional foil into a sheet shape; (2) preferably, the high-power-density laser beam generated by the optical fiber laser generator with the power of more than 50w is matched with a vibrating mirror to irradiate the end face of the functional foil which is cut and wound into a sheet shape in the atmosphere room temperature environment; (3) the focal point of the laser beam is not higher than the focal length by 2mm on the slitting end surface, the optimal line spacing of the focal point is set to be 0.08mm, and the ring spacing is set to be 0.5 mm; (4) the end faces of the functional foil which is cut and wound into sheets are irradiated and scanned for one time, a dust suction device can be properly added, and the generated dust is prevented from flying. The invention thoroughly solves the problems of removing metal burrs at the edges of the cut positive and negative electrode foils and preliminary forming of the oxidized insulating layer at the cut end surface in the manufacturing process of the foil type electronic energy storage component.)

1. A method for removing slitting burrs in a foil type electronic energy storage component manufacturing process is characterized by comprising the following steps: the method comprises the following steps:

(1) cutting functional foil meeting the width according to the design requirement of an electronic component by using a current splitting machine and rolling the functional foil into sheets;

(2) irradiating the end face of the functional foil which is cut and wound into a sheet shape in the atmosphere room temperature environment by using a laser generator, preferably a high-power-density laser beam generated by a fiber laser generator of more than 50w, and a vibrating mirror;

(3) the focal point of the laser beam is not higher than the focal length by 2mm on the slitting end surface, the optimal line spacing of the focal point is set to be 0.08mm, and the ring spacing is set to be 0.5 mm;

(4) the end faces of the functional foil which is cut and wound into sheets are irradiated and scanned for one time, a dust suction device can be properly added, and the generated dust is prevented from flying.

2. The method for removing the slitting burrs in the manufacturing process of the foil-type electronic energy storage component as claimed in claim 1, wherein the method comprises the following steps: the steps 1-4 can remove burrs on the end face and simultaneously form an oxidized insulating film layer thicker than natural oxidation due to local high temperature of the foil metal layer in the air.

Technical Field

The invention relates to the technical field of aluminum electrolytic capacitors, super capacitors and lithium ion batteries, in particular to a method for removing slitting burrs in a manufacturing process of foil type electronic energy storage components.

Background

A capacitor is a device that holds electric charge, and is one of electronic components that are used in large numbers in electronic equipment. The aluminum electrolytic capacitor is divided into a liquid aluminum electrolytic capacitor and a solid aluminum electrolytic capacitor. The traditional low-voltage liquid electrolytic capacitor can generate false short-circuit faults due to slitting burrs in production and manufacturing; the high-voltage liquid electrolytic capacitor is easy to cause the point discharge of the positive and negative foil burrs in a high-voltage state to cause the implosion of the capacitor, and because of the self-healing characteristic of the electrolytic capacitor, the product is not easy to be removed in the manufacturing process, and the final use end causes more loss.

The solid electrolytic capacitor uses a solid conductive polymer material, the conductive capacity is higher than that of electrolyte, but one of the defects of the solid conductive polymer material is that an oxide film cannot be repaired, an aluminum foil notch generated in the manufacturing process of the solid capacitor core package is not covered by the oxide film, and the capacitor core package is firstly repaired by the oxide film and then is immersed in the solid conductive polymer material when the solid capacitor is manufactured.

The super capacitor lithium ion battery is also similar to the structure of an aluminum electrolytic capacitor, and generally, functional materials are coated on an aluminum foil and a copper foil and then are cut and assembled. Burrs and metal dust generated by the notch in the slitting process are easy to cause micro short circuit of the super capacitor or the battery, self discharge is generated, and the qualification rate and the cycle life of the super capacitor or the battery are greatly reduced.

The main reason for the above problem is to control the burrs of the notches in the material slitting process, and the length of the burrs is generally not more than 10um as a control index in a manufacturing factory. The generation of burrs in the aluminum foil during the slitting process is not controllable due to the ductility of the metal properties and the precision of the equipment.

At present, flattening method, brush wiping method and point discharge ablation method are used for improving the cutting burr in the industry, and the methods can not solve the problem of oxidation insulation of the length and the section of the burr.

Disclosure of Invention

The method for removing the slitting burrs in the manufacturing process of the foil-type electronic energy storage component thoroughly solves the problems of removing the metal burrs at the edges of the slitting positive and negative foils in the manufacturing process of the foil-type electronic energy storage component and preliminary forming of the oxidation insulation layer at the slitting end face.

The purpose of the invention is realized by the following technical scheme, and the specific steps are as follows:

step 1: cutting functional foil meeting the width according to the design requirement of an electronic component by using a current splitting machine and rolling the functional foil into sheets;

step 2: irradiating the end face of the functional foil which is cut and wound into a sheet shape in the atmosphere room temperature environment by using a laser generator, preferably a high-power-density laser beam generated by a fiber laser generator of more than 50w, and a vibrating mirror;

and step 3: the focal point of the laser is not higher than the focal length by 2mm on the slitting end face, the optimal line spacing of the focal point is set to be 0.08mm, and the ring spacing is set to be 0.5 mm;

and 4, step 4: the end faces of the functional foil which is cut and wound into sheets are irradiated and scanned for one time, a dust suction device can be properly added, and the generated dust is prevented from flying.

Furthermore, the invention can remove burrs on the end surface and simultaneously form an oxidation insulation film layer thicker than natural oxidation due to local high temperature of the foil metal layer in the air.

Compared with the prior art, the invention has the beneficial effects that:

1. the method removes the burrs on the section of the foil, the base material foil is not subjected to friction deformation by external force, and particularly the burrs can be completely and thoroughly removed on the section with uneven material receiving without damaging the base foil;

2. the method has simple process, adopts non-contact treatment on the cut foil section, and simultaneously avoids the pollution problem caused by contact of the foil roll;

3. the invention can control the removal amount of the metal on the end face of the foil substrate according to the technical requirements, so that the metal of the base layer is lower than the oxide insulating layer or the coating functional layer of the cut surface of the foil, and the safety and reliability of the product are greatly improved.

Drawings

FIG. 1 is a schematic cross-sectional end view of a foil formed in example 1 of the present invention.

FIG. 2 is a schematic cross-sectional end view of a foil formed in example 2 of the present invention.

Detailed Description