ALUMINUM ALLOY PLATE FOR BATTERY LID FOR USE IN MOLDING OF INTEGRAL EXPLOSION-PROOF VALVE, AND METHOD FOR PRODUCING SAME

WIPO Patent Application WO/2020/070944

A1

Provided are: an aluminum alloy plate for a battery lid, which has proper strength and has excellent heat-dissipating properties, moldability and properties to be softened upon processing, and which enables the molding of an integral explosion-proof valve showing small variations in operating pressure and having excellent repeated fatigue resistance properties; and a method for producing the aluminum alloy plate. An aluminum alloy plate for a battery lid for use in the molding of an integral explosion-proof valve, the aluminum alloy plate being characterized by having a component composition comprising 1.05 to 1.50% by mass of Fe, 0.15 to 0.70% by mass of Mn, 0.002 to 0.15% by mass of Ti, less than 0.05% by mass of B and a remainder made up by Al and impurities, wherein the Fe/Mn ratio is adjusted to 1.8 to 7.0, the contents of Si, Cu, Mg and V that are contained as impurities are adjusted to less than 0.40% by mass, less than 0.03% by mass, less than 0.05% by mass and less than 0.03% by mass, respectively, and also characterized by having tensile strength of 95 MPa or more and an elongation value of 40% or more, and having a recrystallized structure, wherein, the (TS95 - TS90) value is less than -4 MPa when the tensile strength measured after being subjected to a cold-rolling procedure at a rolling reduction rate of 90% is defined as TS90 and the tensile strength measured after being subjected to a cold-rolling procedure at a rolling reduction rate of 95% is defined as TS95, and the elongation value measured after being subjected to a cold-rolling procedure at a rolling reduction rate of 90% is 5.0% or more. It is preferred that the average crystal grain diameter of recrystallized grains in the recrystallized structure is 15 to 30 μm.

JPH10330927	SPUTTERING TARGET MATERIAL MADE OF ALUMINUM ALLOY
JP5582982	An aluminium alloy and a manufacturing method for the same
JP6322577	Aluminum alloy foil and its manufacturing method

TAMAKI YUUICHI (JP)
KANAMORI KEIJI (JP)
SHIMOSAKA DAISUKE (JP)
ANAMI TOSHIYA (JP)

PCT/JP2019/027785

April 09, 2020

July 12, 2019

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NIPPON LIGHT METAL CO (JP)

C22C21/00; C22F1/04; H01M50/147; C22F1/00

WO2013008314A1

2013-01-17

JP2019102431A	2019-06-24
JP2008261008A	2008-10-30
JP2007107048A	2007-04-26
JP2013104072A	2013-05-30
CN107604212A	2018-01-19
CN107502787A	2017-12-22
JP2002134069A	2002-05-10
JP2004197172A	2004-07-15
JP2012177186A	2012-09-13
JPH09199088A	1997-07-31
JPS504007B1	1975-02-13
JP5872256B2	2016-03-01

See also references of EP 3862449A4

AOKI, Atsushi et al. (JP)

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