Zigzag Separator Electrode Assembly for Stable Cell Insertion
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Solution Overview
Problem
The existing electrode assemblies face issues with positional displacement of electrodes with respect to the separator during transportation or insertion into the cell case, which can lead to performance degradation and reliability concerns.
Innovation Solution
An electrode assembly is designed with a zigzag-shaped separator that includes intervening portions, upper and lower folded portions, and an outermost covering portion, where at least one of the folded portions is connected to the electrodes, ensuring secure positioning and preventing displacement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional separator structure is used, then the manufacturing process is simple, but positional displacement of electrodes occurs during transportation or insertion
Solution Approach 1:
The separator is designed with a zigzag shape instead of a straight configuration. This curved geometry allows the separator to conform to the electrode arrangement and provides mechanical interlocking features that prevent positional displacement during transportation and insertion into the cell case.
Solution Approach 2:
The separator is divided into multiple functional portions: intervening portions positioned between adjacent electrodes, upper folded portions connecting upper ends, and lower folded portions connecting lower ends. This segmentation allows each portion to perform its specific function while collectively providing stable electrode positioning.
2Reliability
If the separator is connected to electrodes at multiple points, then positional displacement is prevented, but the manufacturing complexity increases
Solution Approach 1:
The upper folded portions and lower folded portions are integrated into a single continuous separator structure. This merging reduces the number of separate components that need to be assembled, simplifying the manufacturing process while maintaining multiple connection points for secure electrode positioning.
Data Source
AI summary
An electrode assembly includes a plurality of electrodes arranged side by side in one direction, and a separator formed in a zigzag shape and configured to insulate the electrodes from each other. The separator includes a plurality of intervening portions interposed between a pair of electrodes, an upper folded portion, and a lower folded portion. At least one of the upper folded portion and the lower folded portion is connected to the electrode.