Battery Pack Vent Non-Flammable Flame Blocking Member
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Solution Overview
Problem
In battery packs with multiple cells, thermal runaway can lead to secondary ignitions or explosions as heat or flames are transferred between cells, posing a risk of fire spread and damage.
Innovation Solution
A battery pack design featuring a case with vent holes and non-flammable members that include a flame blocking portion with multiple flow paths, made from materials like brass, bronze, or stainless steel, to discharge gases and flames externally while reducing temperature and blocking oxygen ingress, thereby preventing secondary explosions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If vent holes are provided in the case to discharge gas, then gas discharge function is improved, but flames or high-temperature gas may escape to the outside causing secondary ignition
Solution Approach 1:
A non-flammable member is introduced as an intermediary component between the vent hole and the external environment. This member includes a flame blocking portion that acts as a mediator to allow gas to pass through while blocking flames and high-temperature gases, thus resolving the contradiction between gas discharge function and flame escape prevention
Solution Approach 2:
The non-flammable member creates a protected pathway that maintains an inert environment for the discharged gas. By using non-flammable materials and designing the flame blocking portion, the system ensures that the gas discharge path remains free from combustion, allowing gas venting without enabling secondary ignition
2Productivity
If the flame blocking portion has multiple flow paths, then gas discharge efficiency is improved, but the structure becomes more complex
Solution Approach 1:
The flame blocking portion is segmented into multiple flow paths instead of a single channel. This segmentation allows gas to be distributed across multiple pathways, improving discharge efficiency while maintaining a manageable structural complexity through modular design
Solution Approach 2:
The flame blocking portion utilizes a porous structure with multiple interconnected flow paths. This porous design naturally provides multiple gas discharge routes without requiring complex mechanical structures, as the porous material itself creates the necessary flow channels through its inherent structure
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 minimizes the discharge of flames and high-temperature gases outside the battery pack, reducing the risk of fire spread and secondary explosions, and maintains internal pressure to prevent external air from entering and reacting with flames.
Implementation Method 1
a flame blocking portion disposed inside the body part to lower a temperature of gas or flames passing through the inside of the body part and through the flame blocking portion
Implementation Method 2
an non-flammable member coupled to the vent hole, wherein the non-flammable member includes a body part coupled to the case to extend a gas discharge path and a flame blocking portion
Data Source
AI summary
A battery pack includes a plurality of battery modules, a case accommodating the plurality of battery modules therein and having at least one vent hole for discharging a gas formed therein to the outside, and an non-flammable member coupled to the vent hole and blocking movement of flames, wherein the non-flammable member includes a pipe-shaped body part coupled to the case to extend a gas discharge path and a flame blocking portion disposed inside the body part to lower a temperature of gas or flames passing through the inside of the body part.