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Liquid cooling systems

Liquid cold plates

Eaton liquid cold plates are precision heat exchanging components that mount directly onto heat-generating devices, including CPUs, GPUs, power electronics, PCBAs, and EV battery cells, and transfer waste heat into a circulating coolant.

Eaton liquid cold plates act as the part of a liquid cooling system that absorbs waste heat from devices like semiconductors, microprocessors, printed circuit board assemblies (PCBAs) or other power electronics and transfers it to the liquid cooling system. Optimize cooling efficiency and uphold the ideal operating temperature of electronic components by harnessing the exceptional heat-absorbing capabilities of liquid through cold plates.

Liquid cold plates

A liquid cold plate (LCP) : also called a liquid cooling plate, serves as a critical interface within a liquid cooling system, guiding pumped fluid to heat sources and transferring waste heat into the coolant for subsequent cooling. Cold plates feature a heat source mounting surface, internal passages for liquid to pass through, and an inlet and outlet. Thermal engineers optimize cold plate liquid flow path design and construction to maximize cooling within the liquid cooling system constraints like pressure drop and flow.

Cold plates are typically manufactured from aluminum or copper and are available in stamped, machined, round tube, and flat tube manifold designs, each optimized for different performance, weight, and cost requirements. In data center environments, cold plate liquid cooling is a preferred solution for direct-to-chip cooling of high-density AI accelerators and server processors where air cooling cannot manage the heat load.

Why use liquid cold plates?

Leverage the high heat capacity of liquid to quickly absorb more heat than air cooled thermal management solutions. Coldplates excel at dissipating high-density, high-output heat loads within a diverse range of system configurations, facilitating the effective transfer of heat into the liquid cooling system.

Eaton extended surface liquid cold plates
Eaton extended surface liquid plates

How do liquid cold plates work?

Cold plate cooling works by placing a thermally conductive plate directly against a heat-generating component. Coolant, typically deionized water or a water-glycol mix, is pumped through internal channels or passages within the plate. As the coolant flows through, it absorbs heat conducted from the device through the plate material. The heated coolant then travels through a liquid loop to a heat exchanger or coolant distribution unit (CDU), where the heat is rejected before the cooled fluid is recirculated. The internal flow path geometry is engineered to balance heat transfer efficiency against acceptable pressure drop for the system.

Why choose Eaton for your liquid cold plate?

Backed by 40+ years of cold plate engineering and manufacturing expertise, Boyd Thermal by Eaton’s engineers excel at developing and manufacturing high quality, compact and durable coldplates. Thermal simulation and CFD modeling are available from the design stage to meet your system requirements while reducing weight and complexity. We leverage accurate performance simulations based off decades of empirical data to quickly optimize cold plate design and accelerate your design cycle. Eaton's extensive fabrication methods and 100% in-line leak and flow performance unit testing on help you reduce product weight, push performance or decrease overall assembly size with high performance LCPs.

Eaton cfd of coldplate

Liquid cold plate technologies

Eaton liquid cold plates

Meet application requirements with the right construction

Since liquid cooling is used in a wide variety of applications, Boyd Thermal by Eaton offers multiple liquid cold plate technologies to meet thermal performance, pressure drop, wetted path material compatibility, weight, geometric constraints, durability, and production volume requirements. Our engineering team leverages the best fit technology to meet project requirements like thermal performance, flow rate, resistance and pressure drop, wetted path materials, weight, durability and geometry.

Learn more about our most popular LCP technologies:

Stamped liquid cold plates

Stamped cold plates are a lightweight cold plate construction that leverages the manufacturing efficiency of aluminum stamping one or both sides of the LCP. This approach further reduces manufacturing time and costs by streamlining flow path, mounting geometry and other features into a single process and eliminates CNC time. Stamped cold plates can be enhanced with internal fins to boost thermal efficiency and are controlled atmosphere brazed (CAB) brazed for 100% leak-tested seals.

Stamped cold plates are typically constructed entirely from aluminum, simplifying material compatibility across the cooling loop and reducing galvanic corrosion risk.

Eaton liquid cooling loop

Machined liquid cold plates

Machined and brazed cold plates offer the most flow path and structural geometry customization for a heat source to liquid system interface. Optimize complex, 100% leak-tested flow channels with precision CNC machining and high-quality CAB or vacuum brazing. Boyd Thermal by Eaton’s broad technology portfolio enables additional performance boost with fin inserts to further enhance heat transfer into the liquid system.

Round tube liquid cold plates

Eaton round tube liquid cold plates are cost-effective component cooling for low to moderate heat loads. Tubed cold plates consist of copper or stainless-steel tubes pressed into channeled aluminum plates using either our Hi-Contact™ or Press-Lock technologies. Tube cooling plates are available with either continuous tube styles or a manifold style. Enhance tube cold plate performance with the addition of turbulators by 5-15%.

Eaton contact liquid cold plates
Eaton flat tube liquid cold plates

Flat tube manifold liquid cold plates

Flat tube cold plates are ideal to cool small, high heat density components like thermoelectric coolers in limited vertical spaces. Using thin-walled aluminum multi-port extrusion (MPE) tubing, flat tube cooling plates minimize thermal resistance between the cold plate and heat source and produce surface thermal uniformity. Flat tube LCPs use more viscous fluids like ethylene glycol and water (EGW), oils, 3M Fluorinert and Polyalphaolefin (PAO) with their enhanced internal surface area and low pressure drop.

Liquid cold plate customization

Every Eaton liquid cold plate can be engineered to specific application requirements. The options below cover the main variables in a custom cold plate design.

Materials

  • Aluminum
  • Copper
  • Stainless steel

Wetted path needs to be compatible with other components in the liquid loop. Mixing copper and aluminum leads to galvanic corrosion that decreases system performance and lifetime.

Flow path options

  • Meso-channel
  • Parallel channel
  • Tube and/or manifold

Manufacturing processes

  • CNC machining
  • Friction stir welding
  • Stamping
  • CAB brazing
  • Vacuum brazing
Have a specific application in mind? Contact Boyd Thermal by Eaton to discuss a custom liquid cold plate design.
Specifications
Part number
CP20G01
CP20G03
416101U00000G
416201U00000G
416301U00000G
416401U00000G
416501U00000G
416601U00000G
CP10G01
CP10G03
CP10G05
CP10G07
CP10G14
CP10G16
CP10G18
CP10G20
CP12G01
CP12G05
CP15G01
CP15G05
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