Electrode Assembly Asymmetric Tab Shapes Prevent Cross-Welding
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Solution Overview
Problem
In lithium secondary batteries, the distinction between cathode and anode components is challenging due to similar appearances and materials, leading to potential confusion during assembly and electrical connection, which can result in incorrect wiring and performance issues.
Innovation Solution
The electrode assembly features cathode and anode tabs with different shapes or positions, and leads with varying shapes or materials, allowing for clear differentiation between cathode and anode components during assembly and connection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If cathode and anode components use similar materials and appearances to maintain manufacturing simplicity, then manufacturing cost and process complexity are reduced, but component identification becomes difficult leading to assembly errors
Solution Approach 1:
The patent applies asymmetry by making the welding portions of cathode and anode tabs have different shapes. Specifically, the cathode tab welding portion has a first shape while the anode tab welding portion has a second shape that is different from the first shape. This asymmetric design enables easy visual differentiation between cathode and anode components during assembly, preventing incorrect connections while maintaining simple manufacturing processes using conventional tab formation methods
2Device complexity
If cathode and anode tabs have identical shapes and materials to reduce manufacturing complexity, then device complexity is reduced, but the risk of cross-welding and incorrect connections increases
Solution Approach 1:
The patent implements asymmetry in the welding portion shapes of cathode and anode tabs. The cathode tab welding portion has a first shape while the anode tab welding portion has a second shape different from the first. This asymmetric configuration provides clear visual distinction between positive and negative terminals, effectively preventing cross-welding errors and incorrect connections during battery assembly while keeping the tab structure relatively simple
3Manufacturing precision
If welding portions have uniform shapes to simplify manufacturing, then manufacturing precision requirements are reduced, but assembly reliability decreases due to inability to distinguish polarity
Solution Approach 1:
The patent applies asymmetry by designing the welding portion of the cathode tab with a first shape and the welding portion of the anode tab with a second shape that differs from the first. This asymmetric design enables clear visual identification of polarity during assembly, ensuring correct connection orientation while maintaining consistent and precise manufacturing processes for both cathode and anode tabs
Data Source
AI summary
Disclosed is an electrode assembly including a plurality of alternately arranged cathode and anode plates, a separator interposed between the cathode plate and the anode plate, a plurality of cathode tabs respectively formed on the cathode plates, a plurality of anode tabs respectively formed on the anode plates, a cathode lead coupled to the cathode tabs, and an anode lead coupled to the anode tabs, wherein the welding portions in which the cathode and anode tabs are respectively coupled to the cathode and anode leads have different shapes, or kinds of the cathode and anode tabs are identical and kinds of the cathode and anode leads are different.