Integrated Rivet Terminal Venting for Simpler Battery Cap Assembly
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Solution Overview
Problem
The complexity of secondary battery structures due to multiple parts, such as terminals and vents, increases production costs and complicates management, necessitating a simplified design.
Innovation Solution
A rivet terminal with a hollow cavity and integrated vent part that ruptures to release gas, simplifying the cap assembly and reducing the number of components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple separate parts (terminal part, insulating part, vent part) are connected to the cap assembly, then each part can perform its specific function, but the structure becomes complicated and unit cost increases
Solution Approach 1:
The patent combines the terminal part, insulating part, and vent part into a single integrated rivet terminal component. The terminal portion provides electrical connection, the hollow cavity provides insulation and gas containment, and the vent portion provides gas release functionality. This merging eliminates the need for multiple separate parts and their connections, directly resolving the technical contradiction by maintaining functional performance while simplifying the cap assembly structure.
Solution Approach 2:
The rivet terminal is designed as a multi-functional component that simultaneously performs electrical connection (terminal part), insulation (hollow cavity), and gas venting (vent part). This universal design allows a single component to replace multiple specialized parts, reducing structural complexity while maintaining all necessary functions for reliable battery operation.
2Adaptability or versatility
If multiple separate parts are used in the cap assembly, then specific functions can be performed, but the number of components increases and management becomes complicated
Solution Approach 1:
The patent merges multiple functional components into a single rivet terminal structure. The terminal portion, hollow cavity, and vent portion are integrated into one component that is riveted to the cap assembly. This reduces the quantity of components from multiple separate parts to a single integrated part, while maintaining the adaptability and versatility of performing electrical connection, insulation, and gas venting functions.
3Reliability
If various parts are connected to the cap assembly, then the battery can operate with proper terminal and vent functions, but production cost increases
Solution Approach 1:
The integrated rivet terminal reduces manufacturing costs by eliminating the need to manufacture, inventory, and assemble multiple separate components. The single integrated part can be manufactured more efficiently and requires only one riveting operation to attach to the cap assembly, reducing labor and assembly costs while maintaining proper terminal and vent functions.
Solution Approach 2:
While integrated, the rivet terminal is designed with distinct functional segments (terminal portion, hollow cavity, vent portion) that can be designed and manufactured independently before integration. This segmentation approach allows for optimized manufacturing of each functional area while achieving cost benefits through integration, resolving the contradiction between functional reliability and manufacturing ease.
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 rivet terminal simplifies the secondary battery structure, lowers production costs, and enhances management efficiency by integrating the vent function into a single component.
Implementation Method 1
the vent part is ruptured when a gas within the secondary battery is released
Data Source
AI summary
A rivet terminal includes: a current carrying part connected to a terminal part of a secondary battery and configured to electrically connect a terminal plate of the secondary battery and a current collector within the secondary battery and having a cavity formed therein; and a vent part in the cavity within the current carrying part and configured to be ruptured to enable a gas within the secondary battery to be released.