Battery Pack Venting Partition Wall for Thermal Runaway Gas Release
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Solution Overview
Problem
Existing battery packs fail to effectively vent high temperature gases generated during cell degradation, leading to heat accumulation and potential ignition or explosion, and transfer heat to neighboring cells.
Innovation Solution
A battery pack design featuring a supplementary partition wall with internal gas flow paths and suction holes that compartmentalize cell assemblies, connecting to a gas venting path and exhaust hole for rapid gas release to the outside.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If high temperature gases are not effectively released from battery modules, then heat accumulation occurs accelerating degradation and causing ignition or explosion, but adding complex gas venting structures increases device complexity
Solution Approach 1:
The partition wall is divided into a body portion and a supplementary portion, with the supplementary portion extending into the battery module to create localized gas venting channels. This segmentation allows targeted gas release from specific degraded cells without requiring a complete redesign of the entire battery pack structure, thus improving safety while maintaining structural simplicity.
Solution Approach 2:
The supplementary partition wall acts as an intermediary structure between degraded battery cells and the external environment. It provides a controlled pathway for high temperature gases to escape through the gas venting channel, preventing direct heat transfer to neighboring cells while avoiding the need for complex active cooling or monitoring systems.
2Object-affected harmful factors
If high temperature gases from degraded cells are allowed to escape, then heat transfer to neighboring battery modules occurs causing degradation or explosion of entire battery pack, but blocking gas flow prevents effective heat dissipation
Solution Approach 1:
The partition wall structure implements local quality by having the supplementary portion extend specifically into the battery module space where degraded cells are located. The gas venting channel is positioned to capture gases from localized degradation events, allowing targeted heat management that prevents harmful heat transfer to neighboring cells while maintaining overall heat dissipation capability.
Solution Approach 2:
The partition wall is segmented into functional zones: the body portion provides structural support and general separation, while the supplementary portion with the gas venting channel provides localized gas extraction. This segmentation enables differentiated heat management - blocking heat transfer in critical areas while allowing heat dissipation in other regions.
3Object-generated harmful factors
If supplementary partition wall with gas flow path is added to vent high temperature gases, then gas can be released to outside preventing influence on neighboring cells, but the structure complexity and manufacturing difficulty increase
Solution Approach 1:
The supplementary partition wall is integrated with the existing partition wall structure, combining the body portion and supplementary portion into a single unified component. The gas venting channel is formed as an integral feature of this combined structure, merging the functions of structural support and gas venting into one manufacturable part, thereby reducing assembly steps and manufacturing complexity.
Solution Approach 2:
The supplementary partition wall serves multiple functions simultaneously: it provides structural support like the main partition wall, creates gas flow paths for venting, and acts as a thermal barrier. This multi-functionality reduces the need for separate components, simplifying manufacturing while achieving effective gas release and heat management.
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
Prevents ignition and explosion by rapidly venting high temperature gases, and prevents heat transfer between neighboring cell assemblies.
Implementation Method 1
a gas flow path (230) which is formed inside the supplementary partition wall (200) and connected to the gas venting path (131)
Implementation Method 2
a suction hole (210) which is formed in the supplementary partition wall (200) and connected to the gas flow path (230)
Data Source
Figure 1
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Figure 3
AI summary
The present invention provides a battery pack. More specifically, the battery pack of the present invention, which contains a cell stack assembly including a plurality of cells, is characterized by including: a pack case in which a cell stack assembly is mounted; and a supplementary partition wall coupled to the pack case to compartmentalize a space inside the pack case; wherein the pack case includes: a base plate supporting a lower part of the mounted cell stack assembly; and a side wall of hollow structure coupled to the base plate to support a side part of the cell stack assembly, and including a gas venting path internally; and wherein the supplementary partition wall is coupled to the base plate and side wall of the pack case, and includes a gas flow path internally in connection with the gas venting path of the side wall.