Brazed Liquid Cooling Cold Plate Heat Dissipation Thermal Management Solution

A brazed liquid cooling plate is a liquid-cooled heat dissipation plate formed by welding the upper and lower cover plates and the internal flow channels/fins in a high-temperature vacuum furnace using the brazing process. It features excellent sealing performance, precise flow channels, low thermal resistance and high pressure resistance, making it one of the mainstream processes for high-end liquid cooling plates.

It generally consists of three layers:

• Upper cover plate: provides sealing, interfaces and mounting surface
• Middle layer: flow channel plate / turbulence fins / pin fins
• Lower cover plate: bonding surface for heat-generating components

The three layers are metallurgically bonded into an integral unit through brazing.

1. Sheet metal forming → coating / pre-placing brazing filler metal
2. Stacking and positioning → loading into vacuum brazing furnace
3. High-temperature heating (approx. 600℃ for aluminum)
4. Brazing filler metal melts, wets and fills gaps
5. Cooling and forming to create high-strength sealed welds

• Serpentine flow channel: simple structure, low pressure drop
• Staggered / parallel multi-channels: uniform heat transfer
• Micro-channel fins: for high heat flux density scenarios
• Pin fin array: ultra-high heat transfer, suitable for GPUs / lasers

• New energy vehicles: motor controllers, OBC, DC-DC converters, 800V SiC modules
• Energy storage & fast charging: PCS energy storage converters, ultra-fast charging stations, heat dissipation for flash charging shunts
• Industrial control & power: SVG, photovoltaic inverters, high-voltage inverters
• Optoelectronics & computing power: lasers, GPU servers, radar systems