Battery Pack Partition Wall Venting for Hot Gas Compartmentalization
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Solution Overview
Problem
Battery packs face issues with heat accumulation and potential ignition or explosion due to ineffective release of high temperature gases generated during the charging and discharging process, which can also lead to degradation of neighboring cell stack assemblies.
Innovation Solution
A battery pack design incorporating a supplementary partition wall with internal gas flow paths and a gas venting system that allows for rapid release of high temperature gases outside, preventing heat transfer to neighboring assemblies by compartmentalizing the space and connecting gas flow paths to a larger gas venting path and exhaust hole.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If high temperature gases are not effectively released, then heat accumulation occurs accelerating battery module degradation, but adding venting structures increases device complexity
Solution Approach 1:
The battery pack is divided into multiple compartments using partition walls, with each compartment containing battery modules. The partition walls include integrated gas flow paths that segment the venting function into distributed channels throughout the structure, allowing effective gas release without requiring complex external venting systems.
Solution Approach 2:
The partition walls serve dual functions: structural compartmentalization and gas venting. The gas flow paths are merged into the partition wall structure itself, combining the supporting/separator function with the venting function in a single integrated component, thereby reducing overall device complexity.
2Productivity
If high temperature gases are released without compartmentalization, then venting is effective, but heat transfers to neighboring battery modules causing degradation or explosion
Solution Approach 1:
Partition walls divide the battery pack into separate compartments, each containing battery modules. The gas flow paths are segmented into separate channels within the partition walls, allowing gases from different compartments to be vented independently through dedicated paths, preventing cross-contamination and heat transfer between neighboring modules.
Solution Approach 2:
The partition walls act as intermediary structures between adjacent battery module compartments. The gas flow paths within the partition walls serve as controlled intermediary channels that guide hot gases away from neighboring modules while maintaining structural separation, preventing direct heat transfer between compartments.
3Object-affected harmful factors
If supplementary partition walls with gas flow paths are added, then heat transfer to neighboring modules is prevented, but manufacturing complexity increases
Solution Approach 1:
The gas flow paths are merged directly into the partition wall structure during manufacturing. The partition walls are designed as single integrated components that combine structural support, compartmentalization, and gas venting functions, eliminating the need for separate assembly steps and reducing manufacturing complexity despite the enhanced functionality.
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 or explosion within the battery pack and prevents heat transfer to neighboring cell stack assemblies, ensuring safe operation and extended battery life by effectively venting high temperature gases.
Implementation Method 1
a high temperature gas generated by any one of the cell stack assembly can be released to the outside by using a supplementary partition wall interposed between the cell stack assembly and having a gas flow path formed therein
Implementation Method 2
a side wall of hollow structure coupled to the base plate to support a side part of the cell stack assembly, and including an internal gas venting path
Data Source
AI summary
A battery pack includes 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.