Battery Pack Vent Filtration for Dust and Ignition Control
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Solution Overview
Problem
Conventional battery packs face issues with external ignition phenomena and vent flow path clogging due to the release of sparks and dust, which can lead to explosions and frame damage.
Innovation Solution
A battery pack design incorporating a primary filter in the vent flow path that filters dust before it reaches the final filter, comprising a series of plate-shaped filters arranged in parallel with varying densities and orientations to prevent clogging and external ignition.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a mesh is formed on the frame to minimize dust release, then external ignition phenomena are reduced, but the vent flow path becomes clogged by dust accumulation
Solution Approach 1:
The vent flow path is segmented into multiple sections with filters positioned at specific locations (entry point and/or exit point). This segmentation allows dust to be filtered at controlled points without completely blocking the vent path, resolving the contradiction between preventing dust release and maintaining vent flow reliability.
Solution Approach 2:
A filter is introduced as an intermediary component between the battery module and the external environment. The filter captures dust particles while allowing gas to pass through, preventing dust from reaching the mesh on the frame and causing clogging, while still minimizing external ignition phenomena.
2Object-affected harmful factors
If the vent flow path is blocked by dust, then external ignition is prevented, but internal pressure increases rapidly causing explosions
Solution Approach 1:
Dust is filtered out preliminarily at the vent flow path entry point and/or exit point before it can accumulate and block the path. This preliminary filtering action prevents the subsequent problem of rapid pressure increase that would lead to explosions, while still preventing external ignition.
Solution Approach 2:
The filter acts as an intermediary that captures dust particles while permitting gas flow. This prevents complete blockage of the vent path, maintaining pressure relief functionality while preventing dust from causing external ignition phenomena.
3Object-affected harmful factors
If filters are added to the vent flow path to prevent dust release, then external ignition is reduced, but the device complexity increases
Solution Approach 1:
The filtering function is segmented into discrete filter components positioned at specific locations (entry point and/or exit point) rather than a complex distributed system. This segmentation simplifies the overall device structure while effectively preventing dust release that causes external ignition.
Solution Approach 2:
Filters are placed only at critical locations (vent flow path entry point and/or exit point) where dust filtration is most needed, rather than throughout the entire system. This local approach prevents dust release effectively while minimizing the addition of complex components.
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 primary filter effectively prevents dust from being released outside the battery pack, reducing the risk of external ignition and clogging, thereby enhancing safety and durability.
Implementation Method 1
a primary filter that is provided at a point where the direction of the vent flow path changes, and primarily filters the dust before the final filter
Implementation Method 2
a final filter that filters the dust before the gas containing the dust is discharged to the outside of the battery pack
Data Source
AI summary
A battery pack according to an embodiment of the present disclosure can include at least one battery module with a plurality of battery cell stacks. The battery pack can include a pack frame that houses the battery module and a vent flow path through which gas containing dust generated from the battery module moves. A final filter of the battery pack can filter the dust before the gas containing the dust is discharged to the outside of the battery pack. The battery pack can include a primary filter that is provided at a point where the direction of the vent flow path changes, and primarily filters the dust before the final filter.