Battery Cell Support Plate Structure to Prevent Tab Tearing
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Solution Overview
Problem
Batteries are prone to deformation or damage during collisions or impacts, affecting safety and reliability due to the potential tearing off of the tab from the cell, which can disrupt the current loop.
Innovation Solution
A battery cell design incorporating a support plate that is clamped between the cell and the housing, comprising side and bottom support plates to limit movement and prevent tab tearing, with fillets to reduce stress concentration and facilitate insertion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the cell is directly placed in the housing without support structure, then the device complexity is reduced, but the reliability deteriorates due to potential tab tearing during collision or impact
Solution Approach 1:
A support plate is introduced as an intermediary component between the cell and the housing. The support plate is clamped between the side wall of the housing and the cell, providing mechanical support and limiting cell movement without requiring complex fixation mechanisms. This intermediary structure effectively prevents tab tearing during collisions or impacts while maintaining simple assembly.
2Reliability
If the cell is firmly fixed in the housing, then the reliability is improved by preventing tab tearing, but the ease of operation deteriorates due to difficulty in cell insertion
Solution Approach 1:
Fillet structures with curved surfaces are designed at the corners of the support plate and housing. These fillets reduce stress concentration and provide guiding surfaces that facilitate smooth cell insertion. The curved geometry allows the cell to be easily guided into position during assembly while ensuring firm fixation once inserted, resolving the contradiction between easy insertion and reliable fixation.
Data Source
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AI summary
A battery cell (20) is disclosed, where the battery cell (20) includes: a housing (22), the housing (22) including a bottom wall (221), a top plate (223), and a plurality of side walls (222), where the side walls (222) connect the top plate (223) and the bottom wall (221), and the bottom wall (221), the plurality of side walls (222), and the top plate (223) form an accommodating space; a cell (21), disposed in the accommodating space; and a support plate (23), disposed in the accommodating space and is clamped between the side wall (222) and the cell (21).