Secondary Battery Cap Assembly Impact Absorption
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Solution Overview
Problem
Secondary battery cap assemblies often rupture safety vents due to external impacts being transmitted through the gasket, leading to quality issues and potential defects.
Innovation Solution
A cap assembly design that incorporates an impact absorption part between the gasket and safety vent, utilizing an impact absorption space or elastic impact absorption members to absorb and dissipate external impacts, preventing them from reaching the safety vent.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the gasket is pressed during operation, then the sealing function is improved, but the safety vent may be ruptured due to impact transmission
Solution Approach 1:
The patent introduces an impact absorption part as an intermediary element between the gasket and the safety vent. This mediator absorbs impacts transmitted through the gasket during pressing operations, preventing direct transmission of harmful forces to the safety vent while maintaining the sealing function of the gasket.
Solution Approach 2:
The impact absorption part is positioned in advance between the gasket and safety vent to provide cushioning protection. This beforehand cushioning arrangement ensures that when impacts occur during gasket pressing, the safety vent is already protected by the absorbing structure, preventing rupture before it can occur.
2Manufacturing precision
If the safety vent diameter is reduced, then the precision of safety function is improved, but the structural stability deteriorates
Solution Approach 1:
The patent segments the functional responsibilities by separating the safety vent (with its precise small diameter for accurate safety function) from the structural support function. The support part provides the necessary structural stability while the safety vent maintains its precise dimensions for proper operation, allowing each component to optimize its specific function without compromise.
Solution Approach 2:
The patent creates an asymmetric structure where the safety vent has a smaller diameter optimized for its safety function, while the support part has a larger structure optimized for stability. This asymmetric design allows the small safety vent to be properly supported without requiring it to have the structural strength, as the support part provides the necessary stability asymmetrically.
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 safety vent deformation and rupture from external impacts, enhancing the quality and reliability of secondary batteries by effectively absorbing and managing external forces.
Implementation Method 1
an impact absorption part absorbing an impact from the gasket is disposed between an inner wall of the gasket and an outer circumferential surface of the safety vent
Data Source
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AI summary
The present invention relates to a cap assembly for a secondary battery mounted on an opening of a can. The cap assembly comprises: a top cap; a safety element disposed on a lower portion of the top cap; a safety vent disposed on a lower portion of the safety element; and a gasket surrounding edges of the top cap, the safety element, and the safety vent and mounted on the opening of the can, wherein an impact absorption part absorbing an impact from the gasket is disposed between an inner wall of the gasket and an outer circumferential surface of the safety vent.