Zigzag Separator Electrode Assembly for Battery Cell Position Stability
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Solution Overview
Problem
The existing laminated electrode groups are prone to positional displacement during transportation, insertion into cell cases, or under vibrations, which can lead to performance issues in power storage cells.
Innovation Solution
An electrode assembly with a zigzag-shaped separator that includes intervening, upper folded, and lower folded portions, collectively covered by an outermost covering portion, which are connected using laser irradiation or other heating means to prevent relative displacement and ensure secure positioning of electrodes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional laminated electrode group structure is used, then the manufacturing process is simple, but positional displacement occurs between electrodes during transportation, insertion, or vibration
Solution Approach 1:
The separator is divided into multiple functional segments: intervening portions (for insulation), upper folded portions (for connection and positioning), and lower folded portions (for connection and positioning). This segmentation allows each part to perform its specific function, preventing electrode displacement while maintaining manufacturing feasibility
Solution Approach 2:
The separator transitions from a simple planar structure to a three-dimensional zigzag configuration with folded portions extending in multiple directions. This dimensional change enables the separator to mechanically interlock with electrodes and maintain positional stability during transportation and vibration
2Reliability
If the separator is formed in a complex zigzag shape with multiple folded portions, then positional displacement is prevented, but the manufacturing complexity increases
Solution Approach 1:
The separator's physical state is changed through heating (laser irradiation or other heating means) to facilitate connection. The heating process allows the folded portions to be securely attached to electrodes, enabling complex positioning without proportionally increasing manufacturing difficulty
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution effectively prevents positional displacement of electrodes, enhancing the stability and reliability of power storage cells by maintaining the precise arrangement of electrodes, thereby improving the cell's performance and longevity.
Implementation Method 1
which are connected using laser irradiation or other heating means to prevent relative displacement and ensure secure positioning of electrodes
Implementation Method 2
which are connected using laser irradiation or other heating means to prevent relative displacement and ensure secure positioning of electrodes
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 plurality of electrodes from each other. The separator includes a plurality of intervening portions, each of which is interposed between a pair of electrodes, an upper folded portion, a lower folded portion, and an outermost covering portion collectively covering the upper folded portion and the lower folded portion. The upper folded portion is connected to the outermost covering portion, and the lower folded portion is connected to the outermost covering portion.