The rapid expansion of artificial intelligence, high-performance computing, electric vehicles, and energy storage systems is reshaping thermal management requirements across industries. As power density continues to rise, traditional air-cooling methods are no longer sufficient. Liquid cooling, once considered a niche solution, is now becoming mainstream—and 2026 is widely viewed as a turning point for large-scale adoption.
Among various cooling approaches, cold plate liquid cooling has emerged as the dominant solution due to its maturity, reliability, and ease of integration. It plays a critical role in maintaining thermal stability in AI data centers, battery systems, and energy storage infrastructure.
At the heart of every liquid cooling system is the cold plate. Its performance directly affects heat dissipation efficiency, system safety, and long-term reliability. However, manufacturing these components at scale presents significant challenges—especially in welding.
Why Cold Plate Welding Is So Challenging
Liquid cooling plates must meet multiple demanding requirements at once:
- High mechanical strength
- Excellent thermal conductivity
- Corrosion resistance
- Absolute sealing integrity
To meet these requirements, manufacturers typically use aluminum alloys and copper. However, both materials introduce welding difficulties.
Thin-wall structures, dense weld seams, and highly reflective materials make conventional welding processes difficult to control. Common issues include:
- Excessive thermal deformation
- High spatter levels
- Porosity inside weld seams
- Inconsistent sealing performance
These limitations not only affect product quality but also restrict large-scale production and process stability.
Han’s Laser Liquid Cooling Plate Welding Solutions
With extensive experience in laser processing and industrial automation, Han’s Laser has developed a comprehensive set of welding solutions for liquid cooling components.
Rather than offering a single piece of equipment, Han’s Laser provides application-driven process solutions tailored to different material combinations, including:
- Aluminum-to-aluminum welding
- Copper-to-copper welding
- Copper-to-stainless steel dissimilar metal welding
These laser welding solutions are designed to address both performance requirements and mass production challenges in modern liquid cooling systems.
1.Ring Beam Laser Welding for Aluminum Cold Plates
Aluminum alloy cold plates are widely used in electric vehicles and energy storage systems. However, aluminum welding is often unstable due to its thermal conductivity and sensitivity to process fluctuations.
Han’s Laser addresses this with ring beam laser welding technology.
Process Advantages
In a typical application involving lap welding of two 1 mm aluminum sheets, dense weld seams and strict sealing requirements create a demanding process environment.
By using a 2+2 ring beam laser configuration with precise core and outer ring diameters (14/100 μm), the system achieves:
- Effective suppression of spatter
- Reduced porosity
- Stable molten pool behavior
Performance Results
The resulting weld seam is smooth and uniform, with no internal porosity. Leak-tight performance meets strict sealing requirements, and helium leak and burst pressure testing can reach high industry standards.
This ensures long-term reliability for liquid cooling plates operating under continuous thermal load.
2.Red-Blue Composite Laser Welding for Copper and Dissimilar Materials
In high-performance computing and AI data center applications, copper cold plates are widely used because of their superior thermal conductivity.
However, copper is highly reflective to infrared lasers, making it difficult to weld using conventional methods.
Han’s Laser addresses this challenge with red-blue composite laser welding technology.
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How It Works
- Blue laser light (absorption rate >47%) rapidly heats and melts the copper surface
- The molten pool increases absorption of the red laser
- The red laser delivers high power density for deep penetration welding
This dual-wavelength interaction significantly improves process stability and energy efficiency.
Key Benefits
Reduced Spatter
The blue laser preheats and stabilizes the molten pool, minimizing spatter during welding.
Lower Porosity
A larger and more stable molten pool slows solidification, allowing gas bubbles to escape more easily and reducing internal defects.
Higher Efficiency
Improved absorption enables faster welding speeds while maintaining consistent quality.
Dissimilar Metal Welding Capability
For copper-to-stainless steel joints, the process helps overcome differences in thermal properties and reduces the formation of brittle intermetallic compounds.
This results in stronger joints and more reliable sealing performance, which is critical for liquid cooling applications.
From Process Stability to Scalable Production
One of the key challenges in liquid cooling manufacturing is maintaining consistent weld quality across large production volumes.
Han’s Laser integrates its welding technologies into automated systems that ensure:
- Stable energy output
- Repeatable welding paths
- Consistent weld geometry
- Reliable sealing performance
This enables manufacturers to move from small-scale production to mass manufacturing without sacrificing quality.
Supporting the Next Phase of Liquid Cooling Growth
As liquid cooling transitions from early adoption to large-scale deployment, manufacturers need more than just equipment. They need process expertise, system integration, and flexible production solutions.
Han’s Laser has built a vertically integrated capability covering:
- Core laser components
- Complete welding equipment
- Process development and optimization
- Automated production line integration
This allows customers to implement customized solutions based on their specific product designs and production requirements.
Conclusion
The rapid growth of AI infrastructure, electric vehicles, and energy storage systems is driving unprecedented demand for high-performance liquid cooling components.
Laser welding is becoming a key enabling technology for this transition. By improving weld quality, reducing defects, and enabling stable mass production, advanced laser welding machines help manufacturers meet both performance and scalability requirements.
Through ring beam welding for aluminum and red-blue composite welding for copper and dissimilar materials, Han’s Laser provides practical solutions for the most challenging aspects of cold plate manufacturing.
As the liquid cooling industry enters a phase of rapid expansion, these technologies will play a central role in supporting the next generation of thermal management systems.
