Hydraulic Cold Drawing Machine for New Energy Battery Aluminum Cases – Precision Forming for EV Power Cells

Advanced hydraulic drawing technology delivers ultra-smooth, high-accuracy aluminum cases for prismatic and cylindrical batteries – meeting the stringent requirements of EV and energy storage systems.

The Growing Demand for Precision Battery Cases

As the new energy vehicle (NEV) and energy storage markets expand rapidly, the demand for high-quality aluminum battery cases has surged. These cases must provide:

• Tight dimensional tolerances – Consistent inner/outer dimensions for reliable cell stacking and sealing

• Flawless surface finish – No scratches, pits, or contaminants that could compromise battery safety

• Thin, uniform walls – Maximizing internal volume while maintaining structural integrity

• High production efficiency – Meeting the massive volume demands of battery megafactories

Why Hydraulic Cold Drawing for Battery Cases?

Hydraulic cold drawing machines are the optimal solution for producing prismatic (rectangular) and cylindrical aluminum battery cases. Unlike extrusion or impact extrusion, hydraulic drawing offers:

• Smooth, vibration‑free force – Eliminates chatter marks and surface defects critical for battery safety

• Exceptional wall uniformity – Achieves ±0.03mm wall thickness consistency over the entire case length

• Superior surface finish – Ra ≤0.4µm, ready for insulation coating or direct assembly

• High material yield – Minimal scrap compared to machining from solid bar

Key Machine Features for Battery Case Production

Feature	Benefit for Battery Cases
Hydraulic drawbench (20–100 ton)	Smooth, programmable force for thin‑wall aluminum (3003, 6061)
Precision carbide / DLC‑coated dies	Prevents galling; extends die life for high‑volume runs
Closed‑loop thickness control	Real‑time wall thickness monitoring; auto‑adjusts drawing parameters
Automated loading & unloading	High‑speed, continuous operation for battery megafactory volumes
Cleanroom‑compatible design	Sealed lubrication and dust control for contamination‑sensitive battery production

Specifications for Battery Case Drawing

Parameter	Typical Range
Case shape	Rectangular (prismatic) or round (cylindrical)
Case size	Width 30–200 mm, length 50–400 mm
Wall thickness	0.5 – 3.0 mm
Material	Aluminum 3003, 6061, 1050
Drawing force	20 – 100 tons
Production rate	Up to 15–30 pieces/minute (multi‑line)

Critical Applications

• Prismatic battery cases – For EV power batteries (e.g., 27100, 32135, 46110 formats)

• Cylindrical battery cases – For 18650, 21700, 4680, and other round cells

• Energy storage modules – Large‑format aluminum housings for stationary storage

Why Hydraulic Beats Mechanical Drawing for Battery Cases

• No stick‑slip vibration – Mechanical chain drives can leave microscopic chatter marks; hydraulic is perfectly smooth.

• Better wall uniformity – Hydraulic pressure adapts instantly to material variations.

• Lower maintenance – No chains, sprockets, or clutches to wear and contaminate the cleanroom environment.

Integrated Battery Case Production Line

A complete hydraulic drawing line for battery cases includes:

1. Automatic pointing machine – For pre‑cut aluminum cups or tubes

2. Hydraulic drawbench – Multi‑stage drawing for progressive wall reduction

3. In‑line trimming & cleaning – Precise length cutting and parts washing

4. Leak testing station – Optional integrated air‑tightness check

5. Automatic stacking & packaging – Clean, damage‑free output

Conclusion

For battery manufacturers and aluminum case suppliers serving the EV industry, hydraulic cold drawing machines offer the precision, surface quality, and production efficiency required to meet the most demanding cell specifications. With smooth hydraulic force, closed‑loop control, and high‑volume automation, these machines are the key to producing safe, reliable, and cost‑effective battery enclosures.

Ready to discuss your battery case drawing requirements? Contact us for a process evaluation.

Know More About Us FangRong Metallurgical Equipment Manufacturer in China since 1998. Professional in Metal Straightening machine, Cold Drawing machine, Push Pointer Drawing Machine, Automatic Three Lines Drawing Machine, Thread rolling machine, Tube-end shrinking machine, Pointing Machine, Core pipe machine, Polishing Machine etc.

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