Electrode Plate Boundary Structure for Uniform Battery Thickness
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Solution Overview
Problem
The manufacturing of rechargeable batteries with stacking type electrode plates often results in uneven thickness due to variations in the thickness of the electrode plates, making it difficult to meet target external specifications.
Innovation Solution
The electrode plate design includes a substrate with a multi-stage active material layer and a protective member attached to its boundary, ensuring the protective member does not protrude beyond the active material layer, thereby maintaining uniform thickness and improving stacking flatness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the thickness of the electrode plate is increased during manufacturing, then the capacity or performance of the battery may be improved, but the overall thickness of the rechargeable battery becomes excessively thick
Solution Approach 1:
The protective member is applied selectively at specific locations where thickness variation occurs (center and side edges) rather than uniformly across the entire electrode plate. This localized application prevents excessive thickness buildup at critical areas while maintaining the overall battery thickness within specifications.
2Adaptability or versatility
If the thickness of the center and both sides of the electrode plate are differently manufactured, then the electrode plate can accommodate manufacturing variations, but the thickness of the electrode assembly becomes uneven, making it difficult to meet target external specifications
Solution Approach 1:
The protective member is applied in advance to areas prone to thickness variation before the electrode plates are stacked. This preliminary protective action prevents the harmful effect of uneven thickness from occurring in the first place, ensuring that the electrode assembly meets target thickness specifications without requiring post-manufacturing adjustments.
3Manufacturing precision
If a protective member is added to prevent thickness variation, then the uniformity of the electrode plate is improved, but the device complexity increases
Solution Approach 1:
The protective member is implemented as a thin film or tape rather than a bulky structural component. This thin-film approach provides the necessary thickness control and protection while adding minimal complexity to the electrode plate structure. The protective member can be easily applied and integrated into the existing manufacturing process.
Data Source
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AI summary
An embodiment of the present disclosure provides an electrode plate including: a substrate; an active material layer on at least a portion of one surface of the substrate and having a multi-stage end portion; and a protective member on at least a portion of the multi-stage end portion of the active material layer and on the substrate such that the protective member does not protrude past the active material layer in a thickness direction.