Ultrasonic welding of lithium-ion battery tabs is distinguished by using a protective sheet over the area where ultrasonic welding occurs, after superposition of foil tabs; then pressing down with ultrasonic welding device onto protective sheet made out of copper sheet or aluminum sheet with thickness between 0.08mm-0.1mm for ultrasonic welding.
Ultrasonic welding method of lithium-ion battery tabs and protection method using ultrasonic welding are now in practice.
The tab foil has been superposed, an ultrasonic welding area must be protected with a protective sheet before pressing in an ultrasonic welding head to enable ultrasonic welding. This invention includes an arrangement in which a protective sheet is superimposed over tab foil to act as a buffer between its ultrasonic vibration from welding head and tab foil, thus dissipating vibration directly to tab foil. Assembling protective sheets can protect tab foils from vibration-induced fracture, and assist ultrasonic welding parameters (energy, pressure, amps, and so forth) for precision welding operations. Adjust the protective sheet accordingly so as to enhance welding effects and make joining more firm and consistent. The benefit is especially noticeable for batteries with few tab foil layers as fewer surfaces will be damaged by its arrangement and thus welding effect will become more consistent over time.
Battery welding range:
single point, multi point, single layer and multi layer welding of square strips or strips made up of other processes of materials (nickel strip + copper foil; nickel strip + aluminum strip; aluminum foil + aluminium cover = nickel + aluminum-nickel composite strip); Single-point lithium battery tab welding machines come in either 20K or 40K options and you should select your welding head shape according to ultrasonic battery tab welding machine requirements and materials used. Design of welding head texture on bottom anvil surface is especially critical.
