Modular Air-Cooled Chassis for Electronic Modules
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Solution Overview
Problem
Thermal resistance across the heatsink-rail interface in plug-in Conduction Cooled Modules (CCMs) is a significant bottleneck, leading to increased cooling burdens at the system level and high costs due to the reliance on expensive retainers and complex machining for well-machined heatsink/chassis interfaces, which are insufficient for high power dissipation.
Innovation Solution
The solution involves coupling interchangeable heat exchanger modules to form a combined heatsink structure, using frame members to maintain them in a spaced arrangement, and incorporating a thermal interface material to overcome surface roughness and other material features that hinder heat transfer, along with spring-loaded glide mechanisms to prevent direct contact and debris formation during module insertion and removal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If wedgelocks are used to clamp electronic modules to heatsinks, then mechanical clamping force is provided, but thermal interface resistance increases (0.3-0.6°C/Watt)
Solution Approach 1:
The heatsink is divided into multiple modular segments that can be independently positioned and adjusted. Each module can be separately optimized for thermal contact, allowing the system to achieve better thermal interface resistance while maintaining adequate clamping force through distributed contact points rather than relying on a single high-force clamp.
Solution Approach 2:
The heatsink modules are pre-positioned and pre-adjusted to achieve optimal thermal contact with the electronic module before final clamping. This preliminary positioning ensures that the thermal interfaces are already optimized, reducing the dependency on high clamping forces to achieve low thermal resistance.
2Reliability
If well-machined heatsink/chassis interfaces are used, then thermal transfer is improved, but manufacturing cost increases
Solution Approach 1:
The heatsink is segmented into multiple modules, each with simplified machining requirements. Instead of machining one large complex interface, multiple smaller modular interfaces are created, each easier to manufacture while collectively providing superior thermal transfer through increased contact area and optimized thermal pathways.
Solution Approach 2:
Multiple standardized modular components are combined to create the complete heatsink assembly. These modular components use standardized interfaces that reduce machining complexity while maintaining effective thermal transfer when assembled together, lowering overall manufacturing costs.
3Force
If larger wedgelocks are used to increase contact force, then clamping capability is improved, but thermal interface resistance increases due to uneven wedge loading
Solution Approach 1:
The clamping function is distributed across multiple smaller contact points through modular heatsink segments rather than relying on a single large wedgelock. This segmentation eliminates uneven loading issues while maintaining adequate contact force through multiple distributed夹紧 points.
Solution Approach 2:
Each modular heatsink segment is designed with localized optimization for its specific position and thermal load requirements. This allows each module to achieve optimal thermal contact independently, ensuring uniform pressure distribution and consistent thermal interface resistance across the entire assembly.
4Ease of operation
If standard retainer mechanisms are used, then ease of assembly is improved, but thermal performance deteriorates due to insufficient cooling capability for high power dissipation
Solution Approach 1:
The cooling system is segmented into multiple modular heatsink units that can be independently assembled and configured. This modular approach maintains ease of assembly through standardized interfaces while significantly improving overall cooling capability for high power dissipation applications through increased total heat transfer area.
Solution Approach 2:
The modular heatsink design creates universal building blocks that can be configured for different power dissipation levels and application requirements. The same basic modular components serve multiple functions and can be scaled to meet varying thermal management needs while maintaining ease of assembly through standardized mechanisms.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This design enhances thermal regulation by reducing thermal interface resistance, minimizing foreign debris, and lowering fabrication costs by eliminating the need for complex machining, while maintaining effective heat dissipation for high-power electronic modules.
Implementation Method 1
Thermal resistance across a heatsink-rail interface is a known thermal bottleneck for plug-in Conduction Cooled Modules (CCMs)
Implementation Method 2
systems and methods for providing a high-performance air-cooled chassis for plug-in electronic modules
Data Source
AI summary
Systems and methods for facilitating temperature regulation of an electronic module. The methods comprise: coupling first heat exchanger modules of a plurality of heat exchanger modules together to form a first set of heat exchanger modules and second heat exchanger modules of the plurality of heat exchanger modules together to form a second set of heat exchanger modules; using frame members to structurally support and maintain the first and second sets of heat exchanger modules in a spaced apart arrangement; and providing at least one slot between corresponding spaced apart modules of the first and second heat exchanger modules, the at least one slot being sized and shaped to receive the electronic module to facilitate the temperature regulation via the plurality of heat exchanger modules.