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Aluminum Cold Plate Machining for Power Modules and Liquid Cooling Systems

Aluminum Cold Plate machining is an advanced thermal solution for high-power modules such as IGBTs, inverters, and power conversion systems. At our precision engineering hub in Bac Ninh, Vietnam, the application of 6000 Series aluminum alloys combined with multi-axis CNC milling technology enables the fabrication of cooling plates with integrated internal liquid channels. VINACNC's workflow focuses on optimizing heat transfer performance, ensuring absolute leak-tightness of the circulation system, and controlling extreme surface flatness, protecting electronic components from overheating and maintaining stable operational efficiency.

Machining Expertise for Aluminum Cold Plates in Power Modules

Combining air cooling and liquid cooling on a single aluminum plate requires sophisticated machining:

Internal Channel Machining: Utilizing high-speed CNC milling to create liquid circulation grooves inside the aluminum plate. These channels are designed in zigzag or spiral patterns to maximize the heat exchange area between the coolant and the power module surface.
Surface Roughness Control: The contact surface between the aluminum plate and the power module is machined to achieve ultra-fine surface roughness. This eliminates microscopic air pockets, increases the actual contact area, and reduces thermal contact resistance (Rth) to a minimum.
Sealing Technology: Implementing diffusion bonding or Friction Stir Welding (FSW) to seal the aluminum plate layers, ensuring the system withstands high flow pressures without leaking liquid into the electronic components.

Professional Export Packaging and Preservation Process

Precision aluminum cold plates require absolute protection of surface flatness and channel cleanliness. VINACNC implements a rigorous international standard packaging process:

Ultrasonic Cleaning and High-Pressure Drying: Thoroughly removes machining oils and aluminum chips from internal channels using industrial ultrasonic systems, followed by drying with pure compressed air.
Oxidation and Contamination Protection: Each Cold Plate is wrapped in protective PE film and vacuum-sealed or placed in specialized VCI anti-rust paper to prevent salt-air humidity impacts during transit from Vietnam.
Multi-layer Cushioning: Products are placed in shaped foam trays or thick bubble wrap to eliminate mechanical vibration and impact that could deform the precision contact surfaces.
International Standard Crating: Components are packed in fumigated wooden crates (ISPM 15 standard) or high-grammage reinforced cartons for absolute safety.
Traceability Labeling: Clear labeling displaying part codes, specifications, and barcodes for efficient destination logistics control.