Automotive Lighting Module Thermal Baffle Design
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Solution Overview
Problem
In motor vehicle lighting modules, high temperatures from light sources cause premature aging and damage to components, and existing solutions either increase costs with high-temperature-resistant materials or compromise the compact design by altering the spatial layout.
Innovation Solution
A lighting module design featuring thermal baffles with heat-resistant layers positioned beside the light source assembly to block and dissipate heat, using materials like foam, glass fiber, or ceramic, and a specific baffle shape to direct hot air flows away from sensitive components, with optional double baffles and vacuum gaps for enhanced insulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If high-temperature-resistant material is used for heat-sensitive components, then thermal damage is avoided, but manufacturing cost increases significantly
Solution Approach 1:
The patent divides the thermal protection function into two separate components: a thermal baffle (structural element) and a thermal resistant layer (material coating). This segmentation allows the bulk structure to use inexpensive materials while only the critical heat-exposure surfaces use expensive heat-resistant materials, significantly reducing overall manufacturing cost while maintaining thermal protection effectiveness.
Solution Approach 2:
The thermal resistant layer is applied selectively only on portions of the thermal baffle that are directly exposed to high temperatures from the light source, rather than coating the entire baffle structure. This local application of high-performance material minimizes material costs while providing thermal protection exactly where it is needed most.
2Reliability
If spatial layout is changed to maximize distance between light source and components, then thermal damage is reduced, but device compactness is compromised
Solution Approach 1:
The thermal baffle acts as an intermediary barrier positioned between the light source and heat-sensitive components. This mediator blocks and redirects thermal radiation, allowing components to be placed in compact arrangements close to the light source without suffering thermal damage, thus maintaining device compactness while providing thermal protection.
Solution Approach 2:
Instead of solving the thermal protection problem by increasing linear distance (one-dimensional solution), the patent introduces a two-dimensional thermal baffle structure that blocks thermal radiation paths in multiple directions. This allows compact component placement while still providing effective thermal shielding through the baffle's geometric configuration.
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 effectively reduces high temperature damage to components, maintains a compact structure, and lowers costs by using affordable materials and efficient heat dissipation methods, preventing performance loss and aging while maintaining a compact form factor.
Implementation Method 1
a surface of the thermal baffle facing the light source assembly is shaped such that a hot air flow is directed away from the additional functional unit
Implementation Method 2
a thermal resistant layer is provided on at least one portion of the thermal baffle
Data Source
AI summary
A lighting module used in a motor vehicle. The lighting module includes a housing and a light source assembly provided in the housing, wherein at least one thermal baffle is provided beside the light source assembly, and a thermal resistant layer is provided on at least one portion of the thermal baffle. The present utility model also provides a motor vehicle including the lighting module. The lighting module and the motor vehicle of the present utility model can reduce high temperature damage, and can have a low cost and a compact structure.