Battery Cell Barrier Structure for Thermal Runaway Containment
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Solution Overview
Problem
Thermal runaway events in battery assemblies can lead to rapid heat or flame propagation between adjacent cells, posing serious safety risks due to convection effects, even in narrow propagation paths.
Innovation Solution
A barrier is inserted between battery cells, comprising a base portion and cover portions with specific thickness and extension lengths, made of fibers or inorganic materials, to suppress heat or flame propagation in multiple directions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a barrier is inserted between battery cells to block heat or flame propagation, then safety is improved, but device complexity increases
Solution Approach 1:
The barrier is divided into a base portion and multiple cover portions (first cover portion and second cover portion) that extend in different directions. Each portion serves a specific protective function: the base portion blocks heat/flame between cells, while the cover portions protect sub-surfaces and side surfaces of adjacent cells, creating a segmented防护 system that addresses multiple propagation paths simultaneously.
Solution Approach 2:
The barrier extends from a two-dimensional base portion into three-dimensional cover portions that protrude toward adjacent battery cells. This dimensional extension allows the barrier to protect not only the main surfaces but also the sub-surfaces and side surfaces of battery cells, effectively blocking heat and flame propagation in multiple spatial dimensions.
2Reliability
If the barrier covers multiple surfaces of battery cells, then protection effectiveness is improved, but manufacturing precision requirements increase
Solution Approach 1:
The first cover portion and second cover portion have different extension lengths, with the first cover portion extending longer than the second cover portion. This asymmetric design allows each cover portion to be optimized for protecting specific surfaces of adjacent battery cells, improving protection effectiveness while maintaining reasonable manufacturing tolerances through functional differentiation rather than requiring perfect symmetry.
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 barrier effectively blocks and suppresses heat or flame propagation during thermal runaway events, enhancing safety without requiring design changes, and is applicable in green technology sectors like electric vehicles and energy storage systems.
Implementation Method 1
the barrier having an improved effect of blocking and suppressing the propagation of heat or flame in the event of a thermal runaway
Implementation Method 2
the heat or flame may rapidly propagate to another region due to a convection effect, even if the propagation path is relatively narrow
Data Source
AI summary
The present disclosure relates to a barrier and a battery assembly including the same. According to one embodiment, the barrier is a barrier disposed between at least one pair of adjacent battery cells among a plurality of stacked battery cells, and comprises: a base portion having a sheet shape; a first cover portion and a second cover portion respectively extending from at least one side of the base portion; wherein an extension length of the first cover portion may be shorter than an extension length of the second cover portion.