Battery Injection-Hole Sealing Assembly Without Welded Sealing Nails
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Solution Overview
Problem
The existing sealing process for liquid injection holes in cylindrical batteries is complex and costly, and the use of sealing nails can lead to poor welding, causing electrolyte volatilization and degradation of sealing performance.
Innovation Solution
A sealing assembly featuring a sealing element with a connection and sealing portion, a top cover with grooves, and a ring riveting portion that is inserted and riveted to ensure a secure fit, simplifying the sealing process and enhancing performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If sealing nails are welded in liquid injection holes, then sealing performance is improved, but electrolyte volatilization occurs at welding positions causing poor welding
Solution Approach 1:
The patent extracts the harmful welding process from the sealing method. Instead of welding sealing nails in the liquid injection holes (which causes electrolyte volatilization), the invention uses a sealing component that is pressed and deformed to achieve sealing, completely removing the welding step and its associated harmful effects while maintaining reliable sealing performance.
Solution Approach 2:
The patent replaces the thermal welding process with a mechanical pressing and deformation process. The sealing component is inserted into the liquid injection hole and then pressed by a pressing plate, utilizing mechanical force to deform the sealing component and create a seal, thereby substituting the harmful thermal field with a beneficial mechanical field.
2Reliability
If sealing glue particles and sealing nails are used for sealing, then sealing is achieved, but the process becomes complex and cost increases
Solution Approach 1:
The patent merges multiple sealing components (sealing glue particles and sealing nails) into a single integrated sealing component. This sealing component includes a pressing portion, a sealing portion, and a limiting portion, combining the functions of multiple elements into one structure, thereby simplifying the sealing process and reducing complexity while maintaining effective sealing.
Solution Approach 2:
The sealing component serves multiple functions simultaneously: the pressing portion provides sealing contact, the sealing portion creates the actual seal in the liquid injection hole, and the limiting portion prevents over-insertion. This multi-functional design replaces the need for separate sealing glue particles and sealing nails, simplifying the overall sealing system.
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
The new sealing assembly simplifies the process and ensures reliable sealing performance, allowing for accurate quality assessment in tests.
Implementation Method 1
the sealing portion is inserted into the liquid injection hole in an interference fit
Implementation Method 2
the ring riveting portion is riveted to the connection portion
Data Source
AI summary
The present application provides a sealing assembly, including a sealing element and a top cover. The sealing element includes a connection portion and a sealing portion axially connected to each other. The connection portion is disposed protruding from the sealing portion along a radial direction. The top cover is provided with a first groove, a liquid injection hole is provided at a bottom of the first groove, and a ring riveting portion is disposed protruding from a periphery of the first groove. The sealing portion is inserted into the liquid injection hole in an interference fit, and the ring riveting portion is riveted to the connection portion, so that the ring riveting portion is annularly pressed on a top surface of the connection portion. The present application further provides a battery.