Battery Module Venting Barrier for Thermal Runaway Isolation
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Solution Overview
Problem
Existing battery modules face issues with thermal runaway propagation, where high-temperature gas and flame from one module can ignite adjacent modules, causing widespread damage.
Innovation Solution
A battery module design featuring cell barrier structures with venting passages and inflow portions that open and close based on pressure, allowing gases and flames to be quickly discharged externally, while isolating unaffected areas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If a battery module is designed to accommodate multiple battery cells, then the battery module can achieve higher energy density and better thermal management, but the structural complexity and difficulty of ensuring uniform compression force increase
Solution Approach 1:
The battery module is divided into multiple compression units, each independently compressing adjacent battery cells. This segmentation allows each unit to focus on compressing only its adjacent cells, ensuring uniform compression force while managing the complexity of accommodating multiple cells through modular organization
Solution Approach 2:
The compression members are nested within the module structure, with first compression members positioned between first and second battery cells, and second compression members positioned between second and third battery cells. This nesting approach integrates the compression function directly into the cell arrangement, reducing overall structural complexity while maintaining effective compression of multiple cells
2Reliability
If compression members are added to ensure uniform compression force on battery cells, then contact resistance is reduced and electrical connection is improved, but the device complexity and manufacturing difficulty increase
Solution Approach 1:
The compression members are integrated with the heat dissipation plate, merging the compression function with the thermal management function into a single component. This combination reduces the number of separate parts, simplifying the manufacturing and assembly process while ensuring reliable electrical connection through uniform compression
Solution Approach 2:
The compression members serve multiple functions: they provide uniform compression force to reduce contact resistance, ensure good electrical connection between cells, and work in conjunction with the heat dissipation plate for thermal management. This multi-functionality reduces the need for separate components, easing manufacturing while improving reliability
3Productivity
If the battery module structure is simplified to reduce manufacturing cost, then production efficiency increases, but the ability to manage heat dissipation and maintain uniform compression decreases
Solution Approach 1:
The heat dissipation plate is integrated with the compression members, combining thermal management and mechanical compression functions into a single component. This merger simplifies the overall structure, improving manufacturing efficiency while maintaining effective heat dissipation and uniform compression capabilities
Solution Approach 2:
The heat dissipation plate serves as both a thermal management component and a structural element that provides compression force to the battery cells. This multi-functionality allows the module to maintain effective heat dissipation and uniform compression with fewer parts, increasing productivity without sacrificing thermal management performance
Data Source
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AI summary
A battery module includes battery cell stacking bodies including battery cells; a frame member for receiving the battery cell stacking bodies; and at least one cell barrier structure body disposed between the battery cell stacking bodies. The cell barrier structure body includes two planar members in parallel to the battery cell, and a venting passage formed by the two planar members, and the respective planar members include an inflow portion that is opened and closed.