ultrasonic metal welder (SPM3000) 1 Powerful ultrasonic metal welder are widely used in power cell electrode welding . 2. Welding technologyCu tab + Al tab multi-layer welding (30 layer welding , the Al tab thickness is 0.1mm , the Cu tab thickness is 0.1mm ) Cu tab multi-layer welding (30 layer welding , the Cu tab thickness is 0.1mm ) Al tab multi-layer welding (30 layer welding ,the Al tab thickness is 0.1mm )