Battery Pack Flow-Guided Venting for Fast Gas Discharge
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Solution Overview
Problem
Conventional battery packs face issues with delayed gas discharge, leading to increased temperature and pressure, which can result in secondary events such as explosions or large flames, due to inefficient venting mechanisms.
Innovation Solution
A battery pack design incorporating a flow guide member within the transverse member to direct gas flow externally with directionality, utilizing a flow guide member with inclined inlet holes and discharge holes to minimize resistance and facilitate rapid discharge through venting holes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If gas discharge holes are provided in transverse members, then gas can be discharged externally, but gas may remain in the internal space of the transverse member without being discharged quickly
Solution Approach 1:
The transverse member is divided into multiple segments with gas discharge holes distributed across different sections. This segmentation allows gas to be discharged from multiple locations simultaneously, increasing the overall discharge speed and preventing gas accumulation in any single region, thereby maintaining temperature and pressure control.
Solution Approach 2:
Gas discharge holes are arranged in three-dimensional space within the transverse member, utilizing vertical and horizontal dimensions. This multi-dimensional arrangement ensures comprehensive gas evacuation from all regions of the internal space, preventing localized pressure buildup and improving overall discharge efficiency.
2Adaptability or versatility
If venting holes are installed in the pack housing, then gas can be discharged externally, but the placement flexibility is limited
Solution Approach 1:
The venting system is segmented into multiple discharge holes distributed across different surfaces of the pack housing. This allows gas to be discharged from multiple locations simultaneously, improving discharge efficiency while providing flexibility in placement to accommodate different design requirements and spatial constraints.
Solution Approach 2:
The pack housing structure is designed to accommodate venting holes at multiple locations with universal mounting features. This multi-functional design allows the same housing structure to support venting holes in various positions, providing placement flexibility without compromising discharge efficiency.
3Reliability
If conventional venting mechanisms are used, then gas discharge is possible, but temperature and pressure increase rapidly leading to secondary events
Solution Approach 1:
Gas discharge holes are pre-positioned in the transverse members and pack housing before any thermal or pressure events occur. This preliminary arrangement ensures that when gas generation begins, discharge pathways are immediately available, preventing rapid temperature and pressure increases that could lead to secondary events such as explosions or large flames.
Solution Approach 2:
The venting system is designed to rush gas through the discharge holes as quickly as possible, minimizing the residence time of gas in the internal space. This rapid evacuation prevents the accumulation of heat and pressure, thereby preventing secondary events while maintaining high discharge rates.
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 rapid temperature and pressure increases, reduces the risk of explosions, and enhances space utilization by ensuring rapid gas discharge, while offering flexibility in venting hole placement.
Implementation Method 1
configured to guide gas introduced from a transverse portion connection hole in the transverse member to form a first gas flow with directionality in a longitudinal direction of the transverse member
Data Source
AI summary
A battery pack includes a battery module including a module housing and a plurality of battery cells accommodated in the module housing; a pack housing accommodating a plurality of battery modules therein and having at least one venting hole for discharging gas externally from the pack housing; a transverse member installed in the pack housing and disposed in a direction, intersecting an internal space of the pack housing; and a flow guide member disposed in an internal space of the transverse member in a longitudinal direction of the transverse member, and configured to guide gas introduced from a transverse portion connection hole in the transverse member, to form a first gas flow with directionality in the longitudinal direction of the transverse member.