New Energy Vehicles
1. Power Battery Manufacturing (Prismatic / Pouch / Cylindrical / 4680 Cells)
(1) Cell Tab Welding (Core Process)
Welding multi-layer copper foil (anode) and aluminum foil (cathode) to metal tabs; capable of welding 20–60 layers of thin foil in a single pass without burrs or punctures to the cell separator, thereby preventing internal short circuits. Suitable for pouch cells, prismatic aluminum-cased cells, and cylindrical cells. 
Unlike traditional laser welding—which risks burning through thin foils—or resistance welding—which generates excessive heat that can damage the electrolyte—ultrasonic welding offers irreplaceable advantages.

(2) Module Busbar Welding
Welding cell tabs to copper/aluminum busbars and CCS (Cell Contact System) integrated busbars; supports copper-to-aluminum welding and stacking of thick copper or aluminum. The process yields extremely low contact resistance at weld points, ensuring minimal temperature rise during high-current charging and discharging. 
Widely used in mainstream 400V/800V high-voltage battery packs, it provides stable tensile strength and vibration resistance, meeting the demands of vehicle operation on rough roads.

(3) Battery Casing Sealing
Welding aluminum case lids, explosion-proof valves, and aluminum-nickel composite strips to the battery housing; ensures airtight integrity and prevents electrolyte leakage.

2. "Three-Electric" Systems: Electric Motor, Electronic Control, and BMS
• Drive Motor: Welding bundled multi-strand enameled copper wires for stators and pressure-welding copper wires to copper terminals; ensures stable high-current carrying capacity.
• Electronic Control (IGBT Power Modules): Precision welding of copper substrates, aluminum leads, and power pins; minimizes heat-affected zones and avoids damage to semiconductor chips.
• BMS Data Acquisition Harnesses: Multi-point welding of fine aluminum/copper signal wires and temperature sensor harnesses; weld points are compact and space-efficient. 

3. Vehicle-Level High-Voltage Wiring Harnesses & Connectors

• Main High-Voltage Wiring Harness: Utilizes thick, multi-strand copper conductors (up to 300 mm²) and features welded copper-aluminum cable-to-terminal connections—replacing traditional crimping methods—to ensure secure, vibration-resistant performance across temperature extremes; suitable for vehicle high-voltage circuits (OBC, PDU, inverter).

• Internal copper terminals within charging ports and high-voltage connectors are welded to ensure no overheating occurs during high-current fast charging.