Aluminum alloy sheet for battery case use excellent in formability, heat dissipation, and weldability

Patent metadata

Field	Value
Publication number	US-9885097-B2
Application number	US-201314404313-A
Country	US
Kind code	B2
Filing date	May 23, 2013
Priority date	Oct 12, 2012
Publication date	Feb 6, 2018
Grant date	Feb 6, 2018

Abstract

An aluminum alloy sheet having a heat dissipation characteristic that is applicable to a large-size lithium ion battery container, excellent in formability and shape freezability and excellent in laser weldability is provided. An aluminum alloy sheet comprising a cold rolled, annealed material containing Fe: 0.05 to less than 0.3 mass %, Mn: 0.6 to 1.5 mass %, and Si: 0.05 to 0.6 mass %, has a balance of Al and impurities Cu: less than 0.35 mass % and Mg: less than 0.05 mass %, has a conductivity exceeding 45% IACS, has a 0.2% proof strength of 40 to less than 60 MPa, and displays a 20% or more value of elongation is also provided. An aluminum alloy sheet comprising an as-cold-rolled material having a conductivity exceeding 45% IACS, a 0.2% proof strength of 60 to less than 150 MPa, and displaying 3% or more value of elongation is also provided.

First claim

We claim:

1. An aluminum alloy sheet for battery container use which is excellent in formability, heat dissipation, and weldability consisting of a cold rolled, annealed material which consists of Fe: 0.05 to less than 0.3 mass %, Mn: 0.6 to 1.5 mass %, Si: 0.05 to 0.6 mass %, and one or more of Co: 0.001 to 0.5 mass %, and Nb: 0.005 to 0.05 mass %, has a balance of Al and impurities, has, as impurities, Cu: less than 0.35 mass % and Mg: less than 0.05 mass % in chemical composition, has an electrical conductivity of over 45% IACS, has a 0.2% proof strength of 40 to less than 60 MPa, and has a 20% or more value of elongation.

2. An aluminum alloy sheet for battery container use which is excellent in formability, heat dissipation, and weldability consisting of an as-cold-rolled material which consists of Fe: 0.05 to less than 0.3 mass %, Mn: 0.6 to 1.5 mass %, Si: 0.05 to 0.6 mass %, and one or more of Co: 0.001 to 0.5 mass %, and Nb: 0.005 to 0.05 mass %, has a balance of Al and impurities, has, as impurities, Cu: less than 0.35 mass %, Mg: less than 0.05 mass % in chemical composition, has an electrical conductivity of over 45% IACS, has a 0.2% proof strength of 60 to less than 150 MPa, and has a 3% or more value of elongation.

Assignees

• Nippon Light Metal Co

Inventors

• Suzuki Kenta
• Oowada Yasuyuki
• Hori Hisashi
• Mizushima Kazumitsu

Classifications

• H01M50/131

  characterised by physical properties, e.g. gas permeability, size or heat resistance · CPC title

• H01M50/119

  Metals · CPC title

• B23K35/286

  Al as the principal constituent · CPC title

• C22F1/04 Primary

  of aluminium or alloys based thereon · CPC title

• B23K35/0233

  Sheets or foils (B23K35/0244 takes precedence) · CPC title