Hardened aluminum foil for battery collectors

A technology of aluminum hard foil and battery set, applied in the direction of battery electrodes, electrode carriers/current collectors, circuits, etc., can solve the problems of reduced conductivity, achieve the effects of preventing failures, excellent elongation, and preventing foil breakage

Active Publication Date: 2013-03-27
TOYO ALUMINIUM KK
View PDF12 Cites 21 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

That is, in Mn-based alloys, the electrical condu

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
  • Hardened aluminum foil for battery collectors

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0083] As above, the specific mode for carrying out the present invention has been described, and below, the examples in which the effects of the present invention were confirmed are compared with the comparative examples which do not satisfy the elements of the present invention, and will be specifically described. In addition, this invention is not limited to this Example.

[0084] [Preparation of test materials]

[0085] (Invention Example No.1-14, Comparative Example No.15-25)

[0086] Aluminum having the composition shown in Table 1 was melted and cast to obtain an ingot, and after facing the ingot, a homogenization heat treatment was performed at 360 to 550° C. for 2 to 4 hours. The homogenized ingot is hot-rolled, then cold-rolled, intermediate annealed, and then cold-rolled to a predetermined thickness to form an aluminum foil. The conditions of intermediate annealing and cold rolling are shown in Table 1.

[0087] It should be noted that in the case of continuous a...

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

No PUM Login to view more

Abstract

The disclosed hardened aluminum foil for battery collectors is characterized by containing 0.2-1.3% iron, 0.01-0.5% copper, and no more than 0.2% silicon by mass, with the remainder comprising aluminum and unavoidable impurities. Said hardened aluminum foil, which is further characterized by a purity of at least 98.0% by mass and subgrain sizes of at most 0.8 [mu]m in the thickness direction and at most 45 [mu]m in the rolling direction, has a certain degree of strength, excellent stretch, and low electrical resistance.

Description

technical field [0001] The present invention relates to an aluminum rigid foil for a battery current collector used as a positive electrode current collector of a lithium ion secondary battery. Background technique [0002] In recent years, lithium-ion secondary batteries have been used as power sources for mobile devices such as mobile phones and notebook computers. The electrode material of such a lithium ion secondary battery consists of a positive electrode material, a separator, and a negative electrode material. Furthermore, the production of the positive electrode material is carried out by coating about 100 μm thick LiCoO on both sides of about 15 μm thick aluminum foil (or aluminum alloy foil) 2 In order to remove the solvent in the coated active material, the active material is dried, crimped to increase the density of the active material, and then cut and trimmed. As a material for the current collector, for example, a high-purity aluminum foil material disclose...

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): C22C21/00B21B3/00C22F1/04H01M4/66C22F1/00B21B1/22B21B1/40
CPCY02E60/12C22C21/00H01M4/661C22F1/04Y02E60/10B21B1/22B21B1/40
Inventor 伊原健太郎星野晃三梅田秀俊
Owner TOYO ALUMINIUM KK
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap