Electrode Assembly with Rounded Lead Ends
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Solution Overview
Problem
Conventional electrode assemblies suffer from damage to electrode tabs and battery cases due to sharp edges or burrs on electrode leads, which compromises sealability and insulation resistance, especially in pouch-shaped secondary batteries.
Innovation Solution
The electrode assembly features electrode leads with rounded ends to prevent damage to electrode tabs and battery cases, improving sealability by increasing the contact area with the battery case and reducing the risk of internal short circuits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If electrode leads with sharp edges are used to connect electrode tabs, then the connection is simple and manufacturing is easy, but the sharp edges cause damage to electrode tabs and battery cases during assembly and movement
Solution Approach 1:
The electrode leads are designed with rounded ends instead of sharp edges. This curvature modification eliminates the harmful sharp edges that cause damage to electrode tabs and battery cases during assembly and movement, while maintaining the electrical connection function.
2Ease of manufacture
If electrode leads are punched and cut to predetermined size, then manufacturing is straightforward, but sharp edges and burrs are formed at cut regions
Solution Approach 1:
The ends of the electrode leads are rounded through additional processing steps after punching and cutting. This eliminates the sharp edges and burrs formed during standard cutting operations, improving the quality of the electrode lead ends without changing the fundamental manufacturing process.
Data Source
AI summary
Disclosed herein is a stacking or stacking/folding type electrode assembly of a cathode/separator/anode structure, wherein the electrode assembly is constructed in a structure in which tabs (electrode tabs), having no active material applied thereto, protrude from electrode plates constituting the electrode assembly, electrode leads are located at one-side ends of the stacked electrode tabs such that the electrode leads are electrically connected to the electrode tabs, and the electrode leads, joined to the electrode tabs, have rounded ends. An electrochemical cell including the electrode assembly is also disclosed.