Application of Temperature-Feedback Laser Soldering Systems in Automotive Electronics Industry

Application of Temperature-Feedback Laser Soldering Systems in Automotive Electronics Industry

The automotive electronics industry is evolving with two key trends: diversification of product offerings and technological advancement. In recent years, the variety of automotive electronic products has significantly expanded, while technological upgrades are driving the industry toward intelligent and automated solutions. Core components such as chips, sensors, and displays have become pivotal products in this development.

Concurrently, the rapid proliferation of in-vehicle electronic devices is accelerating the push for miniaturization. The high density and complexity of these systems demand maximal functional integration within limited space. In response, manufacturers have developed next-generation miniaturized solutions—micro-connection systems. Automotive connectors, a fundamental component frequently handled by electronics engineers, serve a critical purpose: they bridge isolated or interrupted circuits, enabling current flow and ensuring intended circuit functionality.

Diagram of Automotive Electronics System Modules

The compact structure demands smaller spaces and imposes higher requirements on production processes. In fact, this automotive electronic product integrates multiple high-precision manufacturing technologies. While industrial technological innovation progresses, it also presents significant challenges to traditional processing industries. As automotive wiring harnesses and connection systems continue to miniaturize and safety requirements increase, the development of laser welding technology has undoubtedly become a critical tool for automotive electronics miniaturization.

Currently, constant-temperature high-speed laser soldering systems, combined with modern selective reflow soldering processes, are particularly suitable for automotive electronics welding. The constant-temperature high-speed laser soldering system achieves rapid welding through instantaneous laser heating. Its integrated CCD coaxial positioning system automatically recognizes welding targets, making it a laser selective welding solution specifically developed for modern reflow soldering technology. This enables highly efficient and precise automated production.

The temperature-feedback laser soldering system utilizes a closed-loop control system to achieve real-time temperature monitoring and adjustment during welding. This system ensures the solder joint temperature remains within the set range, with an error margin controlled within ±5°C and a response speed of 20μs, guaranteeing process stability and weld quality. For example, Songsheng Opto-Electronics' laser soldering system features multi-axis servo modules, a real-time temperature feedback system, CCD coaxial positioning, and semiconductor lasers. These components work together to ensure constant-temperature welding and precise alignment of solder joints.

Temperature-feedback laser soldering systems are widely applied in the automotive electronics industry, covering engine control systems, chassis control systems, body electronic control systems, and more. In the new energy vehicle sector, for instance, laser soldering technology is used for precision welding of SiC MOSFET modules to meet the demands of increasingly precise and miniaturized electronic components.

This system can be applied across all SMT applications. Unlike conventional methods, it employs localized heating, ensuring that welding one component does not generate thermal effects on adjacent parts. It is also suitable for microelectronic connectors, such as ultra-fine coaxial cable-to-terminal welding, USB cable welding, flexible printed circuit (FPC) or rigid printed circuit board (PCB) welding, high-precision LCD/TFT screen welding, and high-frequency transmission lines. This technology effectively enables precision processing in automotive electronics manufacturing.

Illustration of Constant-Temperature Feedback Laser Soldering System
Features of Songsheng Opto-Electronics' Temperature-Feedback Laser Soldering System

1. Non-contact welding process eliminates mechanical stress damage and minimizes thermal impact.

2. Multi-axis intelligent work platform (optional) accommodates various complex and precision welding processes.

3. Coaxial CCD imaging positioning and processing monitoring system provides clear visualization of solder joints and enables real-time alignment correction, ensuring machining accuracy and automated production.

4. Proprietary temperature feedback system directly controls solder joint temperature while displaying real-time welding temperature curves to guarantee welding yield.

5. Four-point coaxial integration of laser, CCD, temperature measurement, and indicator light solves the industry challenge of multi-optical path alignment and eliminates complex calibration.

6. Achieves 0.2mm minimum solder joint diameter with 99% excellent yield rate and ultra-short single-spot welding time.

The application of temperature-feedback laser soldering systems in automotive electronics is primarily demonstrated through their high precision, efficiency, and reliability, making them an indispensable technology for automotive electronic manufacturing.