Exposed Heat Sink Layout for Sealed Charger Cooling
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Heat generated by electronic components in battery-powered electrical devices can lead to thermal overload, device shutdown, and component damage, especially in sealed systems where heat dissipation is impeded by thermally insulating materials.
Innovation Solution
The implementation of heat sinks with fins and flanges that are partially exposed to the exterior through openings in the device housing, facilitating heat transfer and dissipation while maintaining a sealed system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the housing is made of plastic or thermally insulating material to prevent contaminant ingress, then sealing effectiveness is improved, but heat dissipation capability deteriorates
Solution Approach 1:
The housing is segmented into sealed and unsealed portions, with the heat sink positioned to extend through an opening in the housing. This allows the majority of the housing to remain sealed for contaminant protection while a specific segment (the heat sink exposure area) remains open for heat dissipation.
Solution Approach 2:
The heat sink acts as an intermediary element that bridges the sealed interior environment and the external environment. It conducts heat from the electronic components through its body to the exposed portion, transferring thermal energy without requiring the housing itself to be unsealed.
2Temperature
If the heat sink is partially exposed to the exterior through openings, then heat dissipation capability is improved, but sealing integrity deteriorates
Solution Approach 1:
The housing is divided into sealed and unsealed zones, with the opening strategically positioned to expose only the heat sink while keeping the rest of the housing sealed. This segmentation allows simultaneous achievement of heat dissipation and contaminant protection.
Solution Approach 2:
The housing exhibits different sealing qualities at different locations: the majority of the housing maintains full sealing integrity, while a localized area (where the heat sink is exposed) remains open. This local quality variation allows the system to achieve both sealing and heat dissipation functions.
3Power
If electronic components generate heat during power transfer, then power transfer functionality is improved, but thermal overload risk increases
Solution Approach 1:
The heat dissipation function is extracted from the housing structure itself and assigned to a dedicated heat sink component. This extracted heat sink is specifically designed and positioned to remove heat from the electronic components, separating the power transfer function from the thermal management function.
Solution Approach 2:
The heat sink serves as a thermal intermediary between the heat-generating electronic components and the external environment. It absorbs heat from the components through thermal conduction and dissipates it to the surrounding air through convection at its exposed surface, preventing thermal overload.
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
Effectively dissipates heat generated within the device, preventing thermal overload and component damage, while maintaining the integrity of the sealed system.
Implementation Method 1
The heat sink is in heat transfer relationship with components of charger electronics of the charger
Implementation Method 2
the heat sink is positioned in facing relationship with the one or more openings such that the heat sink is at least partially exposed to the exterior
Data Source
AI summary
A charger for an electrical device (e.g., a site light) includes a housing defining an interior cavity, and one or more openings formed in the housing. A heat sink is disposed in the interior cavity of the housing and is operable to dissipate heat produced in the housing. The heat sink is positioned in a facing relationship with the one or more openings such that the heat sink is at least partially exposed to the exterior. The heat sink is in heat transfer relationship with component of charger electronics of the charger.