Check patentability & draft patents in minutes with Patsnap Eureka AI!

Aluminum foil manufacturing method and aluminum electrolytic capacitor negative electrode foil

A manufacturing method and technology of aluminum foil, which is applied in the field of aluminum foil, can solve the problems of low bending strength of negative electrode foil, poor distribution of corrosion hole shape, etc., achieve high specific capacitance, improve bending strength, and suppress poor slitting and fragmentation Effect

Inactive Publication Date: 2020-11-24
惠州市冠业新材料科技有限公司
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide an aluminum foil manufacturing method and an aluminum electrolytic capacitor negative electrode foil. The technical solution provided by the present invention solves the problem that the current negative electrode foil manufactured by hard aluminum foil or hard aluminum alloy foil has poor corrosion hole shape distribution. , resulting in a technical problem that the bending strength of the negative electrode foil becomes lower

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Aluminum foil manufacturing method and aluminum electrolytic capacitor negative electrode foil
  • Aluminum foil manufacturing method and aluminum electrolytic capacitor negative electrode foil
  • Aluminum foil manufacturing method and aluminum electrolytic capacitor negative electrode foil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] In this embodiment, a high-purity 1090 hard aluminum foil with a thickness of 48 u and a purity of more than 99.9% is used as a raw material, and its tensile strength is 187 MPa, which meets the requirement of greater than 130 MPa. At the same time, for comparison, 1090 soft aluminum foil with a tensile strength of 71MPa was also selected as the raw material.

[0049] The annealing heat treatment is carried out according to the conditions in Table 1.

[0050] In this embodiment, after the annealing treatment, electrochemical etching is used to enlarge the surface area.

[0051] Specifically, after immersing in a 6N / L hydrochloric acid-sulfuric acid solution at 50°C for 2 seconds, the same solution was energized with 2560 coulombs of 50 Hz AC power for electrochemical corrosion.

[0052]In the chemical cleaning treatment, soak in 1.3N / L sulfuric acid solution at 60°C for 16 seconds, soak in 0.4N / L nitric acid solution at 60°C for 16 seconds, and finally soak in 0.2N / L p...

Embodiment 2

[0059] In this embodiment, a 1050 pure aluminum-based foil with a thickness of 41 u is used as a raw material. The corroded foil produced by this kind of aluminum foil is generally used as the negative electrode foil of low-voltage aluminum electrolytic capacitors with high electrostatic capacity per unit area. Specifically, a hard foil with a tensile strength of 268MPa and a soft foil with a tensile strength of 85MPa are selected.

[0060] The annealing heat treatment is carried out according to the conditions in Table 2.

[0061] In this embodiment, chemical etching is used to enlarge the surface area after the annealing treatment.

[0062] Specifically, soak in 8% NaOH solution at 50°C for 5 seconds, and soak in 7N / L hydrochloric acid solution at 105°C for 15 seconds.

[0063] In the chemical cleaning treatment, soak in 1.3N / L sulfuric acid solution at 60°C for 16 seconds, soak in 0.4N / L nitric acid solution at 60°C for 16 seconds, and soak in 0.2N / L phosphoric acid solut...

Embodiment 3

[0070] In this embodiment, a 3003 aluminum alloy foil with a thickness of 21u is used as the raw material. The corroded foil produced by this kind of aluminum foil is generally used as the negative electrode foil of medium and high voltage aluminum electrolytic capacitors that do not require high capacitance per unit area. Specifically, a hard foil with a tensile strength of 285MPa and a soft foil with a tensile strength of 117MPa are selected.

[0071] The annealing heat treatment is carried out according to the conditions in Table 3.

[0072] In this embodiment, chemical etching is used to enlarge the surface area after the annealing treatment.

[0073] Specifically, soak in 8% NaOH solution at 50°C for 5 seconds, and soak in 6.7N / L hydrochloric acid at 100°C for 9 seconds.

[0074] In the chemical cleaning treatment, soak in 1.3N / L sulfuric acid solution at 60°C for 16 seconds, soak in 0.4N / L nitric acid solution at 60°C for 16 seconds, and soak in 0.2N / L phosphoric acid ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Tensile strengthaaaaaaaaaa
Tensile strengthaaaaaaaaaa
Tensile strengthaaaaaaaaaa
Login to View More

Abstract

The invention relates to the technical field of aluminum foils, and in particular, relates to an aluminum foil manufacturing method and an aluminum electrolytic capacitor negative electrode foil. Themanufacturing method comprises the steps: carrying out annealing heat treatment of an aluminum foil or aluminum alloy foil; completing corrosion treatment for enlarging the surface area of the aluminum foil or the aluminum alloy foil subjected to heat treatment;completing chemical cleaning treatment on the aluminum foil or the aluminum alloy foil subjected to corrosion treatment; completing film coating treatment on the aluminum foil or the aluminum alloy foil subjected to chemical cleaning treatment, wherein in the step S100, the heat preservation temperature in the heat treatment process ranges from 150 DEG C to 500 DEG C, and the heat preservation time ranges from 10 s to 150 s. The invention aims to provide the aluminum foil manufacturing method and the aluminum electrolytic capacitornegative electrode foil, and by adopting the technical scheme provided by the invention, the technical problem that the bending strength of the negative electrode foil is reduced due to poor shape distribution of corrosion holes of the negative electrode foil manufactured by adopting a hard aluminum foil or a hard aluminum alloy foil at present is solved.

Description

technical field [0001] The invention relates to the technical field of aluminum foil, in particular to an aluminum foil manufacturing method and an aluminum electrolytic capacitor negative electrode foil. [0002] technical background [0003] Formed foil is a polar foil used as an energy storage element. In aluminum electrolytic capacitors, the formed foil formed by chemical processing of aluminum foil is used as the negative electrode foil. The negative electrode foil used for aluminum electrolytic capacitors, in order to increase the electrostatic capacity, uses chemical corrosion or electrochemical corrosion to expand the surface area of ​​the aluminum foil. [0004] The main component of the corrosion solution is generally hydrochloric acid. After the surface corrosion process is completed, in order to reduce the corrosion solution and aluminum foil residue remaining on the surface of the aluminum foil, it is usually cleaned with dilute sulfuric acid or dilute nitric ac...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): H01G9/045C25F3/04C23F1/36C22F1/04
CPCC22F1/04C23F1/36C25F3/04H01G9/045
Inventor 钱礽淼崔棋张宪文
Owner 惠州市冠业新材料科技有限公司
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com