Backward impact-extruded aluminium cell cases developed to customer drawings, combining a seamless wall, integral closed base and controlled critical dimensions for cell-development and qualification programmes.
Representative product family · final specification subject to drawing review
Primary processCold backward impact extrusion
Forming press1,000-ton PLC hydraulic
Body constructionSeamless wall + integral base
Critical dimensionsUp to ±0.05 mm*
Manufacturing route
Controlled from drawing to dimensional release.
01Drawing, alloy and manufacturability review
02Slug preparation, surface control and lubrication
03Controlled tooling setup and backward extrusion
04Specified trimming, sizing or secondary operations
05Automated washing and dimensional verification
Engineering inputs
What we confirm before development.
Material grade and condition
Outside and inside diameters
Wall and integral bottom requirements
Overall length and opening interface
Critical dimensions and inspection method
Prototype and expected production quantity
Application scope
Built for defined functional requirements.
Lithium-ion cell development hardware
Rechargeable cell cases
Prototype and qualification programmes
Customer-specific cylindrical cell formats
ENGINEERING QUALIFICATION±0.05 mm*
Capability statement
Critical dimensions are confirmed individually.
Selected critical dimensions can be considered for ±0.05 mm capability where geometry, alloy condition, tooling access, secondary operations and inspection method support the requirement.
*Not a universal tolerance for every feature. Final capability is confirmed through drawing review, development trials and the agreed inspection plan.
