Integrated Terminal Rivet Assembly for Cylindrical Cell Connection
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Solution Overview
Problem
Conventional terminal rivets for cylindrical secondary cells require separate current collecting plates and complex alignment processes, leading to manufacturing inefficiencies and potential electrical and mechanical connection issues.
Innovation Solution
A terminal rivet assembly that integrates a rivet and a current collecting portion, where the current collecting portion is directly in contact with the electrode roll, simplifying the manufacturing process and eliminating the need for separate current collecting plates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate current collecting plates are used in conventional terminal rivets, then electrical connection can be established, but manufacturing complexity increases and alignment precision requirements increase
Solution Approach 1:
The patent combines the terminal rivet and current collecting plate into a single integrated component. The rivet body directly serves as the current collecting plate, eliminating the need for separate components. This integration simplifies the manufacturing process, reduces assembly steps, and maintains reliable electrical connection between the electrode tabs and external circuitry.
2Reliability
If separate current collecting plates are used, then electrical connection is established, but manufacturing time increases
Solution Approach 1:
By integrating the current collecting function into the rivet body itself, the patent eliminates the need for separate installation of current collecting plates. This reduces manufacturing steps and time while maintaining reliable electrical connection, thereby improving production efficiency.
3Manufacturing precision
If complex alignment processes are used for separate components, then proper electrical connection can be achieved, but manufacturing precision requirements increase
Solution Approach 1:
The integrated design eliminates alignment issues between separate rivet and current collecting plate components. The single-component structure naturally aligns with the electrode tabs through the riveting process itself, simplifying manufacturing and reducing precision requirements while ensuring proper electrical connection.
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
This integrated terminal rivet assembly enhances manufacturing efficiency, simplifies assembly, and ensures reliable electrical and mechanical connections, improving the overall performance and energy efficiency of cylindrical secondary cells.
Implementation Method 1
directing welding means to the current collecting portion to thereby weld the current collecting portion to a connecting portion of the electrode roll
Implementation Method 2
The first end of the shaft is then riveted and thereby deformed to retain the rivet in place in the opening of the casing
Data Source
AI summary
There is disclosed herein a terminal assembly for a cylindrical secondary cell. In the terminal assembly, there is a rivet provided with an external portion configured to close an opening in a casing of the cylindrical cell and to be arranged substantially on the outside of the casing, and an internal portion configured to provide a direct electrical connection between an electrode roll in the secondary cell and the external portion. On the he internal portion there is a shaft configured to extend axially through the casing of the secondary cell from the external portion, and a current collecting portion joined to the shaft, configured to be in direct electrical contact with the electrode roll in the secondary cell, to thereby function as a current collecting plate in the secondary cell. Also disclosed is a cylindrical secondary cell and a method for manufacturing a cylindrica secondary cell.