Lithium battery tab cutting is a critical process before cell packaging, whose core is to cut positive and negative pole pieces (corresponding to aluminum foil/copper foil) into tabs of specific sizes to provide an interface for the connection between the cell and external circuits. Its precision directly affects the electrical conductivity, safety and assembly compatibility of the cell.

The core process flow is as follows:

Pole piece positioning: Convey the calendered pole pieces to the cutting station, and accurately align with the preset cutting positions of the tabs through visual inspection and mechanical positioning systems to ensure uniform spacing.

Precision cutting: Adopt die cutting or laser cutting methods, and drive by precision power such as direct drive motors to cut tabs according to the set dimensions, strictly controlling the flatness of the cut and dimensional tolerance.

Burr removal: Remove burrs on the edge of the cut tabs through grinding or rolling processes (requiring burr height ≤ 0.02mm) to avoid piercing the separator and causing short circuits.

Quality inspection: The visual system real-time detects tab dimensions, cut status and spacing deviation, and automatically screens out unqualified products to ensure batch consistency.

Winding and transfer: Qualified pole pieces are wound and sorted, then transferred to the subsequent packaging process.

This process requires strict control of dimensional tolerance within ±0.01mm to ensure precise matching of tabs with cell casings and connectors, which is an important link to guarantee the overall performance of lithium batteries.