Electrode Assembly Tab Coupling for High Current Output
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Solution Overview
Problem
Existing secondary batteries face challenges in stably coupling electrode tabs to leads, limiting the movement of a large capacity of electrons and resulting in insufficient current output.
Innovation Solution
The electrode assembly features alternately disposed positive and negative electrode plates with separators, and electrode leads with clips and lead lines that securely accommodate and compress the electrode tabs, increasing the contact area and stability of the connection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If electrode tabs are simply attached to leads without secure coupling mechanism, then the structure is simple, but the contact area is small and current output is insufficient
Solution Approach 1:
The electrode lead is divided into a clip portion and a lead line portion, with the clip portion further containing multiple clips that separately accommodate multiple electrode tabs. This segmentation allows each clip to independently secure a tab, increasing total contact area without requiring a complex monolithic structure.
Solution Approach 2:
The electrode tabs are nested within the clips, with multiple tabs accommodated within the clip portion. The pins are inserted through holes in the tabs, creating a nested arrangement where the pin passes through the tab material and is retained by the clip structure, maximizing contact area while maintaining structural simplicity.
2Reliability
If electrode tabs are not securely coupled to leads, then the manufacturing process is simple, but the connection stability is poor and electron movement is limited
Solution Approach 1:
The clips are pre-formed with a specific geometry that allows them to automatically secure the electrode tabs when assembled. The pin insertion through pre-formed holes in the tabs, combined with the clip's retaining structure, creates a self-securing mechanism that ensures reliable coupling without requiring complex assembly operations.
Solution Approach 2:
The pin acts as an intermediary element that mechanically connects the electrode tab to the clip structure. By inserting the pin through the tab and having it retained by the clip, a stable mechanical bond is created that ensures reliable electron transfer while simplifying the overall assembly process.
3Power
If contact area between electrode tabs and leads is increased, then current capacity improves, but the coupling structure becomes more complex
Solution Approach 1:
Multiple electrode tabs are merged into a single clip structure, with the clip portion accommodating multiple tabs simultaneously. The multiple pins connecting multiple tabs to the lead create a combined contact area that increases electron movement capacity while the unified clip design prevents excessive structural complexity.
Data Source
AI summary
An electrode assembly and a secondary battery including the same. The electrode assembly includes a plurality of alternately disposed positive electrode plates and negative electrode plates, separators disposed between the positive electrode plates and the negative electrode plates, a plurality of positive electrode tabs formed in the plurality of positive electrode plates, a plurality of negative electrode tabs formed in the plurality of negative electrode plates, a positive electrode lead including a clip accommodating the plurality of positive electrode tabs and a lead line coupled to the clip, and a negative electrode lead including a clip accommodating the plurality of negative electrode tabs and a lead line coupled to the clip.