Cylindrical Battery Shell Multi-Stage Drawing Die

Product Details:
Designed for formats like 18650, 21700, and 4680 battery cans, this cylindrical battery shell multi-stage drawing die transforms deep-drawing quality steel or aluminum strip into seamless shells. The strip passes through multiple drawing and ironing stations where the wall thickness is progressively reduced while elongating the shell. Hardened carbide ironing rings with precise lead angles enable extreme reduction without fracturing the material.

The entire die set is manufactured with micron-level precision. Guide pillars and die alignment structures guarantee an unmatched concentricity tolerance of under 0.05mm. All tooling components that contact the shell are mirror-polished to avoid surface defects. A centralized lubrication system supplies drawing oil directly to the forming zone, essential for high-speed continuous production on transfer or progressive presses.

Typical applications include lithium-ion battery cans for power tools, electric vehicles, and energy storage systems. Our cylindrical battery shell multi-stage drawing die package includes strip layout design, die manufacturing, trial runs, and shell dimension verification. With focus on long service intervals and consistent quality, this die is a key enabler for high-volume battery manufacturing.