Electrode Assembly With Protruding Taps For Alignment
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Solution Overview
Problem
High-rate discharge performance of rechargeable batteries is hindered by electrode misalignment and increased intervals between electrodes, which affects charging and discharging efficiency.
Innovation Solution
The electrode assembly features a first electrode with protruding taps that are not coated with active material, specifically designed to support the assembly and prevent electrode swelling, allowing for accurate alignment and improved insertion into a case, thereby enhancing discharge performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the number of electrode taps is increased to improve alignment, then manufacturing complexity increases
Solution Approach 1:
The electrode assembly is segmented into multiple winding sections, with electrode taps strategically positioned at specific intervals (e.g., every 3rd winding rotation). This segmentation allows for localized alignment control without requiring complex structures throughout the entire assembly, resolving the contradiction between alignment precision and structural complexity.
Solution Approach 2:
Electrode taps are positioned at specific locations rather than uniformly distributed, creating local quality variations that provide precise alignment control at critical points while maintaining simplicity in non-critical areas. This localized approach improves manufacturing precision without proportionally increasing overall device complexity.
2Reliability
If electrode taps are positioned to prevent swelling, then discharge performance improves
Solution Approach 1:
Electrode taps are positioned in advance at predetermined locations during the winding process to preemptively prevent electrode swelling. This preliminary positioning ensures structural stability is established before operation begins, allowing high discharge performance to be achieved without compromising electrode reliability.
Solution Approach 2:
The position parameters of electrode taps are optimized to specific intervals (e.g., every 3k-2 and 3k-1 wound portions) to achieve the optimal balance between preventing swelling and maintaining discharge efficiency. By changing the positional parameters strategically, both reliability and productivity requirements are satisfied.
Data Source
AI summary
An electrode assembly wound by interposing a separator between a first electrode and a second electrode according to an exemplary embodiment of the present invention is disclosed, wherein the first electrode includes a first coating part coated with an active material and a plurality of first electrode taps that are not coated with the active material and protrude to an outer side of the first coating part, and two first electrode taps per the number of three winding times are formed so as to protrude from the first electrode.