Segmented Heat Sink Assembly for Pluggable Module Thermal Management
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Solution Overview
Problem
Electrical connector assemblies face challenges in heat dissipation due to limited thermal interface area and unreliable thermal contact, which can lead to performance loss or failure of pluggable modules as they generate significant heat during high-speed data transmission.
Innovation Solution
A heat sink assembly with multiple discrete heat sink members and spring members that exert force to ensure reliable thermal contact with the housing of the pluggable module, increasing the thermal interface area and enhancing heat transfer to the surrounding environment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a single heat sink is coupled to the top of the cage, then heat dissipation is achieved, but the thermal interface area is limited and manufacturing tolerances cause unreliable thermal contact
Solution Approach 1:
The heat sink is divided into multiple discrete heat sink members (first heat sink member, second heat sink member, third heat sink member) that contact different walls of the housing. This segmentation increases the total thermal interface area and distributes the heat dissipation across multiple contact points, resolving the limitation of a single heat sink with limited interface area.
Solution Approach 2:
The invention transitions from a single-point thermal contact (top of cage) to multi-dimensional thermal contact by engaging heat sink members with multiple walls (top wall, side walls, bottom wall) of the housing. This dimensional expansion of thermal contact surfaces significantly increases the thermal interface area.
2Device complexity
If a single heat sink is used, then assembly is simplified, but manufacturing variations result in unreliable thermal contact
Solution Approach 1:
The heat sink is segmented into multiple independent heat sink members, each capable of making reliable thermal contact with different surfaces of the housing. This segmentation allows each member to accommodate manufacturing tolerances independently, ensuring reliable thermal contact despite variations in manufacturing.
Solution Approach 2:
The invention introduces spring members that apply mechanical force to the heat sink members, dynamically adjusting the contact pressure to ensure reliable thermal contact. This parameter change (from static to dynamic contact pressure) compensates for manufacturing variations and maintains consistent thermal contact reliability.
3Reliability
If heat sink members are pressed against the housing, then thermal contact reliability improves, but additional components (spring members) increase device complexity
Solution Approach 1:
The spring members automatically apply and maintain the necessary contact force between the heat sink members and the housing without requiring external adjustment mechanisms. The spring force self-regulates to ensure reliable thermal contact, making the system self-adjusting and reducing the need for additional complex control 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
The solution effectively dissipates heat from the pluggable module to the surrounding environment, improving thermal management and preventing performance degradation or failure caused by high temperatures during high-speed data transmission.
Implementation Method 1
a spring member configured to exert a force on the discrete heat sink members to urge the discrete heat sink members against the housing
Implementation Method 2
The plurality of discrete heat sink members transfer heat from the pluggable module to the surrounding environment
Data Source
AI summary
A heat sink assembly for a pluggable module having a housing includes a plurality of discrete heat sink members in thermal communication with more than one wall of the housing. The heat sink members transfer heat from the pluggable module to the surrounding environment. The heat sink assembly also includes a spring member configured to exert a force on the plurality of discrete heat sink members for forcing the heat sink members into thermal engagement with the housing.