Battery Pack Discharge Path for Flame and Gas Venting
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Solution Overview
Problem
Conventional battery packs face issues with thermal runaway and explosion due to flame propagation and heat trapping during thermal events, leading to potential damage and safety hazards.
Innovation Solution
A battery pack design with a discharge path in the pack case to evenly spread flame and gas, incorporating features like a backflow prevention member and path extension to manage thermal distribution and venting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If flame or gas is blocked by the upper frame during thermal events, then the structural integrity of the battery pack is maintained, but the internal pressure increases and thermal runaway is more likely to occur
Solution Approach 1:
The patent extracts the harmful flame and gas from the battery module by providing a dedicated discharge path in the upper frame. The upper frame includes a discharge hole that allows flame and gas to escape from the battery module, preventing pressure buildup and thermal runaway while maintaining the overall structural integrity of the battery pack.
Solution Approach 2:
The upper frame acts as an intermediary structure that mediates between the battery module and the external environment. It provides a controlled discharge path through the discharge hole, allowing harmful substances to escape in a controlled manner rather than being completely blocked or freely dispersing, thus balancing structural integrity with thermal safety.
2Stability of the object's composition
If the upper frame completely blocks flame discharge to maintain structural integrity, then the battery pack structure remains stable, but flame propagation to other modules increases
Solution Approach 1:
The upper frame is segmented to include a discharge hole, creating a localized opening that allows controlled discharge of flame and gas from specific battery modules. This segmentation approach maintains the overall stability of the battery pack structure while preventing uncontrolled flame propagation to other modules by providing a designated escape route.
3Device complexity
If no discharge path is provided for flame and gas, then the battery pack structure remains simple, but thermal concentration and heat energy trapping occur
Solution Approach 1:
The patent extracts the thermal management function from the basic structural role of the upper frame by incorporating a discharge path. This allows heat and flame to be actively removed from the battery modules, preventing thermal concentration and ensuring more uniform temperature distribution throughout the battery pack, while adding minimal structural complexity.
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
Prevents thermal runaway by ensuring uniform thermal distribution and easy gas discharge, reducing the risk of explosion and enhancing safety.
Implementation Method 1
a discharge path is formed in at least a part of the pack case so as to discharge flame or gas generated from the battery cell
Implementation Method 2
discharge path is formed in at least a part of the pack case so as to discharge flame or gas generated from the battery cell
Data Source
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AI summary
Disclosed are a battery pack and a vehicle including the same. The battery pack according to an embodiment of the disclosure may include: a plurality of battery modules in which a plurality of battery cells are stacked; and a pack case configured to store the plurality of battery modules, wherein a discharge path is formed in at least a part of the pack case so as to discharge flame or gas generated from the battery cell.