Battery Pack Partitioned Frame for Internal Flame Redirection
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Solution Overview
Problem
Current battery packs face instability issues, particularly with flame exposure, which can lead to dangerous fires and secondary ignitions, especially in vehicle-mounted applications, posing a risk to occupants and potentially causing accidents.
Innovation Solution
A battery pack design featuring a pack case with a frame that includes partition walls and inlets to divert and separate flames, guiding them through specific flow paths to reduce temperature and pressure, thereby preventing external exposure and minimizing the risk of fire spread.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If flames are allowed to flow directly from the cell assembly to the outside of the battery pack, then the structure is simple and easy to manufacture, but the stability and safety are compromised due to fire risk and potential secondary ignition
Solution Approach 1:
The frame's internal space is divided into multiple flow paths by partition walls, segmenting the flame flow into controlled directions. This segmentation prevents direct flame exposure to the outside while maintaining a manageable structure through modular partition design
Solution Approach 2:
Partition walls are introduced as intermediary structures between the cell assembly and the external environment. These partition walls guide flame flow through designated paths and prevent direct flame discharge, acting as mediators that maintain safety without requiring complete structural redesign
2Object-affected harmful factors
If partition walls are added to the frame to divert flames, then the stability and fire prevention are improved, but the device complexity and manufacturing difficulty increase
Solution Approach 1:
The frame structure is segmented into multiple functional zones using partition walls that create distinct flow paths. This segmentation allows flames to be diverted through controlled routes while keeping each partition module relatively simple for manufacturing
Solution Approach 2:
Partition walls are strategically positioned at specific locations within the frame where flame diversion is most needed. Rather than uniformly complexifying the entire structure, local partition additions target specific harmful flame paths while leaving other areas simpler
3Reliability
If the frame structure is designed with multiple flow paths using partition walls, then the ability to prevent flame discharge is enhanced, but the volume and weight of the battery pack increase
Solution Approach 1:
Partition walls are arranged in the height direction of the frame to create multiple flow paths, utilizing vertical space rather than only horizontal expansion. This dimensional arrangement prevents flame discharge while minimizing the horizontal volume increase of the battery pack
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 prevents flames from being discharged outside the battery pack, reducing the risk of fire and ensuring safer operation by diverting and dissipating flames within the internal structure, thus enhancing the stability and safety of the battery pack.
Implementation Method 1
at least two or more of the partition walls are spaced apart from each other in the height direction of the frame such that a direction of the flow path is able to be changed
Data Source
AI summary
A battery pack includes a cell assembly; and a pack case accommodating the cell assembly in an internal space, wherein the pack case includes a lower plate having a plate shape and a frame disposed to protrude upwardly from the lower plate, wherein the frame has an inlet through which flame flows from the cell assembly into the internal space of the frame, and a flow path through which the flame flowing in from the inlet flows, wherein the flow path is formed by a partition wall disposed in the length direction of the frame, and wherein at least two or more of the partition walls are spaced apart from each other in the height direction of the frame such that a direction of the flow path is able to be changed.