Electrode Tab Depression Guide Member Stacking Alignment
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Solution Overview
Problem
Conventional stacked type electrode assemblies face issues with electrode tabs being pushed during stacking, leading to potential short circuits and alignment challenges, which complicates the manufacturing process and reduces battery capacity.
Innovation Solution
The electrode assembly features hexahedral electrode tabs with inwardly formed depressed portions on three surfaces, and a guide member that aligns and fixes the assemblies to prevent movement in multiple directions, allowing for accurate positioning and simplified stacking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If electrode tabs are designed with simple holes for fixing, then the manufacturing process is simplified, but the electrode tabs can still move in multiple directions and complete fixing is not achieved
Solution Approach 1:
The electrode tab is designed with an asymmetric structure featuring a through hole at one end and a depressed portion at the other end. This asymmetric configuration allows the guide member to engage with both features, preventing movement in multiple directions while maintaining manufacturing simplicity. The asymmetric design enables complete fixing of the electrode tab without requiring complex symmetric structures.
Solution Approach 2:
The invention adds a vertical dimension to the fixing mechanism by creating a depressed portion that extends downward from the surface of the electrode tab. This third-dimensional feature allows the guide member to engage not only through the horizontal through hole but also through the vertical depressed portion, achieving multi-directional constraint while keeping the manufacturing process relatively simple.
2Productivity
If electrode assemblies are stacked without additional alignment processes, then the manufacturing process remains simple, but the electrode assemblies may move and shaking occurs, reducing alignment effectiveness
Solution Approach 1:
The guide member is designed with protrusions that fit into the depressed portions of the electrode tabs before the stacking process begins. This preliminary engagement of the guide member with the electrode tabs establishes precise alignment positions in advance, preventing movement and shaking during the stacking operation while maintaining manufacturing efficiency.
Solution Approach 2:
The guide member acts as an intermediary component between multiple electrode assemblies during stacking. The protrusions on the guide member engage with the depressed portions of the electrode tabs, serving as a mediating structure that ensures precise alignment and prevents shaking without requiring complex additional alignment processes.
3Reliability
If the size of positive electrode is reduced to prevent short circuit, then short circuit prevention is achieved, but the battery capacity is reduced
Solution Approach 1:
The guide member serves as an intermediary structure that prevents short circuit between electrode assemblies of equal size. By engaging with the depressed portions and through holes of the electrode tabs, the guide member maintains proper spacing and alignment, allowing both positive and negative electrodes to be of equal size without risk of short circuit, thereby maximizing battery capacity.
Solution Approach 2:
The guide member is divided into multiple segments or components that can independently engage with different electrode tabs. This segmentation allows precise control of the spacing and alignment between electrode assemblies, ensuring that electrodes of equal size are properly separated and aligned, preventing short circuits while maintaining maximum capacity.
Data Source
AI summary
Disclosed are an electrode assembly including a plurality of electrode sheets having outwardly protruding electrode tabs and a separator interposed between the plurality of electrode sheets, wherein a depressed portion is inwardly formed in at least one of three surfaces of each rectangular electrode tab protruding outwards from the electrode assembly, a guide member configured to stack the same, and a stacked type battery manufacturing method using the same.