... 25 layers and tab onto current collector to prepare Li-Ion pouch-cell for R&D laboratory. Welding Principle Ultrasonic ... 1, nickel oxide and nickel battery nickel screen films each melt.2, lithium batteries, polymer batteries each melt copper and ... equipment.FEATURES Microcomputer control, electronic tuning frequency, LCD display, power adjustable, operate simple, run stable and reliable; welding firm, ...