Hybrid Cooling System for Portable Electronics Using Phase Change Materials
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Smaller portable electronic devices face inadequate heat dissipation as their computing power increases, leading to performance issues due to the power requirements of conventional cooling methods, which negatively affect battery performance.
Innovation Solution
A hybrid cooling system combining a passive cooling device, such as phase change materials, and an active cooling device, like fans, controlled by a controller to minimize power usage by activating the active cooling only when the passive cooling's ability expires, thereby optimizing battery performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If conventional powered cooling devices (fans) are used to dissipate heat from high power density components, then heat dissipation capability is improved, but battery performance deteriorates due to additional power requirements
Solution Approach 1:
The patent applies preliminary action by incorporating phase change materials (PCMs) that are pre-positioned in thermal communication with heat-generating components. These PCMs are prepared in advance to absorb heat during phase transition, providing immediate cooling capability when heat is generated without requiring active power consumption. The PCMs are strategically placed within the housing to establish thermal pathways before operational needs arise.
Solution Approach 2:
The patent uses phase change materials as an intermediary between heat-generating components and the external environment. The PCMs act as a thermal buffer that mediates heat transfer, absorbing excess heat during phase change and releasing it gradually when temperature differential reverses. This intermediary mechanism eliminates the need for direct active cooling (fans) while maintaining thermal management, thus preserving battery performance.
2Temperature
If phase change mechanisms and fans are used in larger portable electronic devices, then heat dissipation is improved, but device size increases
Solution Approach 1:
The patent merges the housing structure with thermal management functionality by integrating phase change materials directly into the housing assembly. The housing serves dual purposes: structural containment and active thermal regulation. The PCMs are incorporated within the housing walls or as inserts that thermally couple with internal components, eliminating the need for separate cooling assemblies and reducing overall device volume.
Solution Approach 2:
The housing is designed with multi-functionality, serving both as the structural enclosure and as an integrated thermal management system. The phase change materials within the housing provide cooling functionality without requiring additional dedicated cooling components. This universal design allows the same structural element to perform multiple functions, thereby minimizing device size while maintaining effective heat dissipation.
3Device complexity
If heat is dissipated through the housing of smaller portable electronic devices, then device simplicity is maintained, but heat dissipation capability becomes inadequate as computing power increases
Solution Approach 1:
The patent implements self-service cooling through phase change materials that automatically absorb and release heat based on temperature conditions without external control or power input. The PCMs self-regulate thermal conditions by undergoing phase transitions when heat exceeds certain thresholds, providing adaptive cooling that responds to computational loads autonomously. This passive yet intelligent thermal management maintains system simplicity while significantly enhancing heat dissipation capability.
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 approach effectively minimizes the power required to cool high-power density components in small devices, optimizing battery performance and ensuring adequate heat dissipation without excessive power consumption.
Implementation Method 1
The passive cooling device is configured to dissipate heat generated by the heat-generating component(s) without requiring electrical power
Implementation Method 2
The active cooling device is configured to dissipate heat generated by the heat-generating component(s)
Data Source
AI summary
A system for cooling an electronic device having a heat-generating component includes a passive cooling device having a cooling ability designed to expire after a predetermined amount of heat is absorbed from the heat-generating component and an active cooling device configured to at least one of dissipate heat generated by the heat-generating component and cool the passive cooling device, when the active cooling device is activated. The system also includes a controller configured to activate the active cooling device after a determination that a predetermined threshold condition has occurred, wherein the predetermined threshold condition is selected to occur after the passive cooling device cooling ability has substantially expired, to thereby substantially minimize power consumption of the active cooling device in cooling the heat-generating component.