Battery Pack Vent Filtration to Prevent Particle Clogging
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Solution Overview
Problem
Existing battery packs face issues with particles ejected from battery modules clogging discharge devices and causing external flames, while also risking structural collapse due to increased internal pressure.
Innovation Solution
A battery pack design featuring a first and second filter part, along with a discharge part, to filter and redirect materials generated within the pack, preventing clogging and external flames, and maintaining structural integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a discharge device is provided to release gas and flame from battery modules, then thermal runaway and heat propagation are prevented, but particles ejected during thermal runaway can clog the discharge device
Solution Approach 1:
A filter is introduced as an intermediary component between the battery modules and the discharge device. The filter allows gas and flame to pass through while blocking particles, preventing clogging of the discharge device while maintaining thermal runaway prevention functionality
Solution Approach 2:
The filter utilizes porous material structure with specific pore sizes that allow passage of gas molecules and flame while blocking larger particle matter. The porous structure enables selective permeability based on particle size, solving the clogging problem
2Quantity of substance
If the battery pack capacity is increased to improve mileage, then energy storage is enhanced, but internal pressure increases causing structural collapse risk
Solution Approach 1:
The filter acts as a pressure-regulating intermediary that allows controlled release of gas while blocking particles. This maintains internal pressure within safe limits, preventing structural collapse of the battery pack housing while preserving high capacity
Solution Approach 2:
The filter's pore size and material properties are specifically designed to allow gas permeability while blocking particles. By changing the physical parameters of the filter material, the system achieves both high capacity operation and structural integrity
3Stress or pressure
If particles are discharged outside the pack during thermal runaway, then internal pressure is relieved, but external flames are generated creating safety hazards
Solution Approach 1:
The filter serves as a protective intermediary that blocks particles from being discharged externally while allowing gas and flame to pass. This prevents particle ejection that could cause external fires, while still providing internal pressure relief
Solution Approach 2:
The filter converts the potentially harmful effect of particle ejection into a beneficial filtering function. By blocking particles while allowing gas discharge, the system transforms what would be a safety hazard into a controlled pressure relief mechanism
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 design effectively filters particles and minimizes their discharge, preventing structural collapse and external flames, enhancing safety and efficiency.
Implementation Method 1
a first filter part located between the pack frame and a battery module located closest to the discharge part among the plurality of battery modules
Implementation Method 2
minimize the discharge of such particles to the outside of the battery pack to thereby prevent generation of external flames
Data Source
AI summary
A battery pack according to one embodiment of the present disclosure includes: a pack frame on which a plurality of battery modules are mounted; at least one discharge part located on one side surface of the pack frame; a first filter part located between the pack frame and a battery module located closest to the discharge part among the plurality of battery modules; and at least one second filter part, each located at a position corresponding to each discharge part on the one side surface of the pack frame, wherein materials generated in the battery module move through the first filter part, the second filter part, and the discharge part.