Battery Pack Venting Surface Texture for Heat Dispersion
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Solution Overview
Problem
Traction battery packs in electrified vehicles face issues with high-temperature vented gases being focused on small areas of the enclosure, leading to thermal energy concentration and potential damage from ablative forces.
Innovation Solution
A traction battery pack venting system with textured forms, such as pins, ribs, or weaves, spaced across the enclosure surface to distribute vented gases and debris evenly, utilizing materials that may sublimate to non-flammable gases at high temperatures, enhancing heat transfer and deflecting energy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If venting area is provided on battery cell, then gas can be vented in response to predetermined condition, but thermal energy becomes concentrated on small area of enclosure surface causing potential damage
Solution Approach 1:
The enclosure surface is segmented into multiple textured forms (protrusions, ribs, or recesses) that divide the concentrated thermal energy into multiple smaller contact areas. This segmentation prevents heat concentration on a single spot by distributing the vented gas across numerous surface elements.
Solution Approach 2:
The invention transitions from a flat two-dimensional surface to a three-dimensional textured surface with protrusions or recesses. This dimensional change increases the effective surface area and creates multiple elevation levels that dispersal thermal energy more effectively across the enclosure.
2Object-affected harmful factors
If textured forms are added to enclosure surface, then vented gas is spread more evenly, but device complexity increases
Solution Approach 1:
The textured forms are integrated directly into the enclosure structure itself, merging the protective function with the existing enclosure rather than adding separate components. This combining approach achieves thermal dispersion without significantly increasing overall device complexity.
Solution Approach 2:
The invention modifies surface parameters (adding texture, protrusions, or recesses) rather than changing the fundamental enclosure design. This parameter change approach achieves thermal energy distribution while maintaining the basic structural simplicity of the enclosure.
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 system effectively spreads thermal energy across a wider area, reducing the risk of enclosure damage and allowing efficient gas expulsion, while maintaining structural integrity and minimizing heat trapping.
Implementation Method 1
a plurality of textured forms are spaced across the surface to spread vented gas over the surface
Implementation Method 2
the plurality of textured forms are comprised of a material that sublimates to a non-flammable gas when a threshold gas temperature is exceeded
Data Source
AI summary
A traction battery pack venting system includes at least one battery cell configured to provide a venting area to vent gases in response to a predetermined condition. The system further includes an enclosure for the at least one battery cell, wherein the enclosure has a surface that faces the venting area. A plurality of textured forms are spaced across the surface to spread vented gas over the surface.