Battery Injection Hole Sealing for Stable Resealing and Refill
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Solution Overview
Problem
Existing battery injection hole sealing structures struggle to balance sealing stability and convenience for secondary injection, leading to potential leakage and safety risks.
Innovation Solution
An injection hole sealing structure with a sealing member integrally connected to the battery, featuring a force applying portion for reliable sealing and easy breakage under external force, allowing for secondary injection with simplified procedures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the sealing member is integrally connected to the battery, then sealing stability is improved, but convenience for secondary injection deteriorates
Solution Approach 1:
The sealing member is divided into two functional parts: an integral connection portion that is firmly connected to the battery body for reliable sealing, and a separate force application portion that can be independently acted upon by external tools. This segmentation allows the sealed portion to remain intact while the force application portion can be broken to enable secondary injection.
Solution Approach 2:
The force application portion is designed as a separate, extractable element from the main sealing structure. This extracted portion can be independently removed or broken by applying external force, while the integral connection portion maintains its sealing function. This extraction enables secondary injection without compromising the sealed battery body.
2Ease of operation
If the sealing member is designed to be breakable, then convenience for secondary injection is improved, but sealing stability deteriorates
Solution Approach 1:
Different parts of the sealing member have different mechanical properties: the integral connection portion is designed with high strength and rigidity to ensure stable sealing, while the force application portion is designed with lower strength to be easily broken by external force. This local differentiation of material properties allows the sealing member to simultaneously provide stable sealing and easy breakability where needed.
Solution Approach 2:
The sealing member is segmented into a strong integral connection portion for sealing and a weak force application portion for breaking. This segmentation ensures that only the necessary portion breaks during secondary injection while the sealing portion remains intact and reliable.
3Reliability
If the sealing member is integrally connected to the battery, then leakage risk is reduced, but complexity of the structure increases
Solution Approach 1:
The sealing member is merged with the battery body through integral connection, forming a unified sealed structure. This merging eliminates the need for separate sealing components and connections, reducing overall structural complexity while maintaining reliable leakage prevention. The force application portion is integrated into this unified structure as a simple protruding element.
Data Source
AI summary
An injection hole sealing structure, a battery and a secondary injection method are provided. The injection hole sealing structure includes a sealing member configured to seal an injection hole of a battery, and the sealing piece is integrally connected to a part of the battery. The sealing member includes a force applying portion for applying an external force.