Secondary Battery Electrode Terminal Vibration Resistance
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Solution Overview
Problem
Secondary battery electrode terminals face challenges with durability due to deformation from external vibrations and internally generated heat, which affects the assembly and reliability of battery packs.
Innovation Solution
The electrode terminal design includes a screw member with a flange and a coupling member that is bent to surround the flange, providing enhanced structural integrity through a crimped or curled assembly, which prevents separation from the cap assembly even under external vibrations or heat, and uses sealing members for improved sealing and electrical insulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional electrode terminal structure is used, then the assembly is simple, but the terminal deforms under external vibration or internally generated heat
Solution Approach 1:
The electrode terminal is divided into multiple functional segments: a screw member with thread engagement, a flange for distribution, and a coupling member with pressing units. This segmentation allows each part to perform its specific function optimally while collectively providing high durability against vibration and heat.
Solution Approach 2:
The coupling member extends in multiple spatial dimensions with pressing units that surround the flange from different directions. This multi-dimensional configuration distributes mechanical stress evenly and prevents deformation under external vibration or thermal expansion.
2Reliability
If the screw member and coupling member are loosely connected, then the assembly is easy to manufacture, but the terminal separates under external vibration
Solution Approach 1:
The pressing units of the coupling member are bent into curved configurations that surround the flange. This curvature creates continuous contact points that maintain stable connection under vibration while allowing for relatively simple manufacturing through bending processes.
3Area of stationary object
If the flange has small cross-sectional area, then the screw member is compact, but the coupling member cannot effectively surround the flange
Solution Approach 1:
The pressing units are designed to extend beyond what would be minimally required, creating multiple surrounding contact points. This excessive action ensures reliable connection and vibration resistance while the flange maintains a practical cross-sectional area for compactness.
Data Source
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AI summary
An electrode terminal (40) and a secondary battery including the same, the electrode terminal (40) including a screw member (310), the screw member (310) including a flange (312) on a lower outer peripheral surface thereof; and a coupling member (320) including an upper portion bent so as to surround at least a part of the flange (312), and a lower portion bent so as to contact an internal surface of a cap assembly (30) and coupled to the cap assembly (30).