Electronics

Ultrasonic Welding in Electronics Industry White Paper

Version: V1.0 (Official) | Target: Electronics Mfg, Connectors, Battery Modules, Automotive Electronics

Abstract: Ultrasonic welding is a critical high-efficiency bonding technology in electronics manufacturing. It features low thermal impact, high airtightness, high consistency, and easy automation integration, widely used in metal conductors, plastic packaging, and PCB structural assembly.

I. Core Advantages in Electronics

Low Thermal Impact (Prevents IC Damage)

IP67/IP68 Airtight & Waterproof

3-8s High Cycle Production

MES Digital Quality Traceability

II. Core Application Scenarios

3.1 Wire Harness Terminals & Metal Conductors

Applications: ECU harnesses, BMS wire sets, Copper-Aluminum dissimilar welding.

Advantages: Extremely low contact resistance, no damage to plating, no solder or flux required, achieves high tensile strength.

3.2 Connectors & Sensor Housings

Applications: USB Type-C housings, Automotive radar sensors, Waterproof connectors.

Results: Achieves high airtight/waterproof grades, avoids overflow risk, and protects internal PCBs and components.

3.3 Battery Tabs & Busbars

Applications: Lithium battery tabs (Al/Cu/Ni), Busbars.

Benefits: Low contact resistance, low heat generation, ensures stable high-rate discharge, suitable for EV and ESS.

III. Process Parameters & Traceability

Item	Typical Parameter Range
Frequency	20kHz / 30kHz / 40kHz
Welding Time / Pressure	0.05 – 1.5 s \| 0.1 – 0.6 MPa
Traceability Data	Time, Energy, Frequency, Pressure, Displacement, Peak Power
Quality Systems	SPC, CPK, MES, IATF 16949

IV. Technical Pain Points & Solutions

Technical Issue	Cause	Professional Solution
PCB Warpage	Excessive Pressure	Servo pressure closed-loop control
Housing Whitening	Excessive Amplitude	Reduce amplitude and welding time
Insufficient Airtightness	Poor Joint Design	Optimize Energy Director (Joint design)
Weak Metal Tensile Strength	Insufficient Energy	Adopt "Energy Mode" precision control

Standard Automation Integration Process

Auto Loading → CCD Positioning → Pre-clamping → Ultrasonic Welding → Data Archiving → AOI Inspection → NG Sorting → Finished Product Outfeed

* Continuous 24h production with 6-axis robots and real-time MES feedback.

Conclusion: Mainstream Process for Precision Electronics

Ultrasonic welding has become the core solution for high quality and low cost in the electronics industry. Equipment introduction should prioritize Product Material, Joint Design, Cycle Requirements, and Traceability Specifications.

Benefits: Yield improvement, cycle optimization, elimination of solder costs, and enhanced digital management.

The above article content was generated by AI.

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