A Core Process in Battery Manufacturing: Within the realm of battery production, ultrasonic welding technology serves as a critical process, excelling particularly in the internal tab welding of battery cells.
Reliable Connections and Safety Assurance: This technology reliably joins the copper and aluminum foils of battery cells to nickel and aluminum tabs. Post-weld electrical resistance is extremely low, and conductivity closely approximates that of the base materials—factors that are vital for the efficient charging, discharging, and safe operation of batteries. Its "cold welding" characteristic—where the metal does not melt during the process, and the temperature in the weld zone remains below 50% of the metal's absolute melting point—prevents high-temperature damage to sensitive battery materials. This significantly mitigates the risk of tab tearing, thereby ensuring the safety of the battery cell.

High-Efficiency and High-Quality Production:Ultrasonic welding is well-suited for ultra-thin materials (capable of handling tabs ranging from 0.1 to 0.3 mm) and generates virtually no thermal diffusion, thereby preventing high-temperature-induced deformation or ablation of circuit boards. The welding process requires no solder or flux, reducing contamination and eliminating the need for subsequent cleaning steps. With a short welding duration (0.1–0.5 seconds), the process is highly efficient; for instance, in the welding of FPC (Flexible Printed Circuit) sensing lines within CCS (Battery Circuit Systems), the yield rate reaches as high as 99.8%. This technology is also applicable to the tab welding of solid-state batteries.

An Efficient Solution for Electrical Connections: In the electrical industry, ultrasonic welding demonstrates equally powerful advantages.

Dissimilar Metal Welding:It excels at welding dissimilar metals—such as aluminum to copper, or aluminum to stainless steel—effectively avoiding the issues of brittle intermetallic compounds often associated with traditional fusion welding, thereby achieving robust and reliable connections. This capability is crucial for applications such as high-voltage connectors in vehicles. 

Power Semiconductor Connections: In the manufacturing of IGBT power semiconductors, ultrasonic welding enables rapid and lossless current switching without inflicting thermal damage upon sensitive ceramic substrates.

High Conductivity and Efficiency:The electrical resistance coefficient at the weld joint is extremely low, minimizing energy loss and facilitating highly efficient power transmission. Furthermore, the process requires no flux, shielding gas, or solder; it is energy-efficient and environmentally friendly, with the energy consumption per weld point amounting to only one-third of that required for laser welding.