Aluminum Alloy Sheets for Lithium-Ion Battery Cases FUSFORM-EN series

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Used in Li Battery Cell Cases, from Mobile Electronics to Automobiles

Picture of Aluminum Alloy Sheets for Lithium-Ion Battery Cases FUSFORM-EN series

Compared with the general-purpose materials 3003, our aluminum sheet for battery cell cases, FUSFORM-EN series, offers better anti-blistering characteristics and excellent formability. Their material strength is not diminished due to stress or heat load when cells are charged or discharged. They can also be welded, a point of concern with high-strength materials.

Features

  • Optimization for production conditions such as alloy composition, heat treatment, rolling ratios, etc., improves formability for deep drawing.
  • Anti-blistering characteristics have been improved to prevent blisters from forming and causing battery degradation when cells are charged and discharged.
  • Material composition is optimized for improved joinability during laser welding of lids and cases.

Product Characteristics

EN Series characteristics compared with general-purpose materials

  EN series General-
purpose materials
Alloy,
tempering
EN03-H14 EN07-H14 EN08-H14 EN12-H14 EN12-H34 3003-H14
Tensile strength
N/mm2
200 214 240 260 280 165
Yield strength
N/mm2
175 207 235 250 245 156
Stretch
%
4 2 2 4 5 6
Earing
%
3 3 3 3 4 3
Limiting drawing ratio
(LDR)
1.98 1.96 1.95 1.95 2.05 2.01
Formability
(Overall evaluation)
Very good Good Good Good Good Very good
Laser weldability
(Splitting)
Good Good Good Good Good Very good
Anti-blistering characteristics Good Good Good Very good Very good Poor

Anti-blistering characteristics evaluation testing results

Fig. Anti-blistering characteristics evaluation testing results

Testing conditions

Original plate thickness 0.6 mm
Three-point bending creep test Processed materials with 50% reduction in plate thickness
Loading stress: 250 N/mm2
Tested at 85°C for 24 hours
Creep formation ratio (Warping after stress release/warping due to stress loading) x 100
Tensile strength after forming process Tensile strength after plate thickness reduction processing (cold rolling)