Battery Pack Venting Structure With Redirected Multi-Channel Flow
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Solution Overview
Problem
Existing traction battery packs face challenges in efficiently communicating vent byproducts from battery cells to an area outside the pack, leading to potential thermal energy buildup within the pack.
Innovation Solution
A battery pack venting system utilizing a structural member with multiple channels and inlets, where vent byproducts are directed through a first channel in one direction and potentially redirected through a second channel in an opposite direction, increasing the time vent byproducts are contained within the pack for thermal energy dissipation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If vent byproducts are quickly exhausted from the battery pack, then the venting efficiency is improved, but thermal energy dissipation is insufficient
Solution Approach 1:
The venting system uses multiple channels (first channel, second channel, third channel) that sequentially direct vent byproducts through different paths. The byproducts are redirected periodically through the channels, increasing their residence time within the pack for thermal dissipation before final exhaustion, thus balancing venting efficiency with thermal energy dissipation.
2Temperature
If multiple channels are added to redirect vent byproducts, then thermal energy dissipation is improved, but device complexity increases
Solution Approach 1:
The venting system combines multiple channels (first channel, second channel, third channel) and redirecting members into a single integrated structural member. This merging approach enables complex flow redirection patterns for enhanced thermal dissipation while maintaining a compact, unified structure that minimizes overall system complexity.
Solution Approach 2:
The structural member serves multiple functions simultaneously: it provides structural support to the battery pack, contains multiple channels for vent byproduct flow, and incorporates redirecting members to control flow direction. This multi-functionality reduces the need for separate components, thereby managing device complexity while achieving thermal energy dissipation goals.
3Temperature
If vent byproducts are contained longer in the pack, then thermal energy dissipation is improved, but venting efficiency decreases
Solution Approach 1:
The venting system segments the flow path into distinct channels (first channel, second channel, third channel) with specific functions. The first channel receives byproducts, the second channel redirects them for thermal dissipation, and the third channel facilitates final exhaustion. This segmentation allows optimized residence time for cooling while maintaining efficient venting through dedicated exit pathways.
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 lengthens the time vent byproducts are contained within the battery pack, allowing for enhanced thermal energy dissipation before exhaustion, thereby reducing thermal energy levels within the pack.
Implementation Method 1
lengthens the time vent byproducts are contained within the battery pack, allowing for enhanced thermal energy dissipation before exhaustion
Data Source
AI summary
A battery pack venting system, including: a structural member having a first channel and a second channel, the first channel configured to communicate a flow of vent byproducts received through at least one first inlet in a first direction to a first outlet from the structural member, the second channel configured to communicate a flow of vent byproducts received through at least one second inlet in a second direction to second outlet from the structural member.