Aluminum alloy foil for electrode collectors and production method therefor

Patent metadata

Field	Value
Publication number	US-9543588-B2
Application number	US-201114235653-A
Country	US
Kind code	B2
Filing date	Jul 29, 2011
Priority date	Jul 29, 2011
Publication date	Jan 10, 2017
Grant date	Jan 10, 2017

Abstract

An object of the present invention is to provide an aluminum alloy foil for an electrode current collector, the foil having a high strength after the drying step while keeping a high electrical conductivity. Disclosed is a method for manufacturing an aluminum alloy foil for electrode current collector, including: maintaining an aluminum alloy ingot comprising 0.1 to 0.5% of Fe, 0.01 to 0.3% of Si, 0.01 to 0.2% of Cu, 0.01% or less of Mn, with the rest being Al and unavoidable impurities, at 550 to 620° C. for 1 to 20 hours, and subjecting the resulting ingot under a hot rolling with a starting temperature of 500° C. or higher and an end-point temperature of 255 to 300° C.

First claim

The invention claimed is:

1. An aluminum alloy foil for electrode current collector, manufactured by the process including:
maintaining an aluminum alloy ingot at 550 to 620° C. for 1 to 20 hours, wherein the aluminum alloy ingot comprises 0.1 to 0.5 mass % (hereinafter referred to as %) of Fe, 0.01 to 0.3% of Si, 0.01 to 0.2% of Cu, 0.01% or less of Mn, with the rest consisting of Al and unavoidable impurities; and
subjecting the resulting ingot under a hot rolling with a starting temperature of 500° C. or higher and an end-point temperature of 255 to 300° C., wherein
tensile strength of the aluminum alloy foil is 220 MPa or higher, 0.2% yield strength of the aluminum alloy foil is 180 MPa or higher, electrical conductivity of the aluminum alloy foil is 58% International Annealed Copper Standard (IACS) or higher, a solid solution of Fe formed in the aluminum alloy foil is 100 ppm or higher, a solid solution of Si formed in the aluminum alloy foil is 80 to 1800 ppm, and a solid solution of Cu formed in the aluminum alloy foil is 80 to 1500 ppm.

2. The aluminum alloy foil for electrode current collector of claim 1 , wherein
the tensile strength and the 0.2% yield strength after performing either one of heat treatments of 24 hours at 120° C., 3 hours at 140° C., or 15 minutes at 160° C., is 190 MPa or higher and 160 MPa or higher, respectively.

Assignees

• Seki Masakazu
• Suzuki Satoshi
• Yamamoto Kenji
• Furutani Tomohiko
• Uacj Corp
• Uacj Foil Corp

Inventors

• Seki Masakazu
• Suzuki Satoshi
• Yamamoto Kenji
• Furutani Tomohiko

Classifications

• Y02T10/7011

  Cross-Sectional Technologies · mapped topic

• H01M4/662 Primary

  Alloys (collectors of lead alloys H01M4/685) · CPC title

• H01G11/68

  characterised by their material · CPC title

• C22F1/00

  Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working (apparatus for mechanical working of metal B21, B23, B24) · CPC title

• B22D25/04

  Casting metal electric battery plates or the like (manufacture thereof by multi-step processes H01M4/82) · CPC title