Battery Cell Venting Structure to Isolate Adjacent Safety Valves
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Solution Overview
Problem
Existing power storage devices face the issue of emissions from one battery cell potentially contacting the safety valve of an adjacent cell, leading to potential hazards.
Innovation Solution
A power storage device design featuring a protective member with cylindrical portions projecting through holes in the bottom wall, guiding emissions into an emission path and preventing them from reaching adjacent cell safety valves, using a closure portion to interrupt upward gas flow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If emissions are discharged directly from the safety valve without any protective structure, then the emission path is simple and short, but emissions may come into contact with adjacent battery cells causing safety hazards
Solution Approach 1:
The emission path is segmented into multiple sections: the through hole in the bottom wall, the cylindrical protective member, and the emission cavity. This segmentation isolates the emissions within defined boundaries, preventing contact with adjacent cells while maintaining a manageable structural complexity through modular design elements.
Solution Approach 2:
The cylindrical protective member acts as an intermediary structure between the safety valve and the emission cavity. It guides the emissions through a controlled path and prevents direct contact with adjacent battery cells, resolving the safety hazard without requiring complete redesign of the emission system.
2Object-affected harmful factors
If a protective member with cylindrical portions is added to guide emissions, then emissions are prevented from contacting adjacent cells, but the device structure becomes more complex
Solution Approach 1:
The protective member provides localized protection only at the emission discharge points where it is most needed. The cylindrical portions are positioned specifically at through holes facing adjacent cells, creating targeted barriers without adding protective structures throughout the entire device, thus minimizing overall complexity while effectively preventing harmful contact.
3Strength
If the bottom wall is made solid without through holes, then structural integrity is maximized, but emissions cannot be directed away from adjacent cells
Solution Approach 1:
The through holes are pre-positioned in the bottom wall at locations that allow emissions to be directed away from adjacent cells before the emissions can cause harm. The cylindrical protective members are also pre-installed to guide the emissions through safe paths, preventing the harmful contact issue before it can occur during battery operation.
Data Source
AI summary
A power storage device includes a plurality of power storage cells, a bottom wall, a panel member that cooperates with the bottom wall to define an emission path, and a protective member. Each power storage cell has a lower surface provided with a safety valve. The bottom wall has a plurality of through holes. The protective member includes a plurality of cylindrical portions projecting through the through holes, respectively, toward the panel member.