Electrode Roll Temperature Control for Groove Depth Uniformity
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Solution Overview
Problem
Existing electrode manufacturing apparatuses face challenges in maintaining uniformity of groove depth in the width direction during the production of large-area batteries, leading to inconsistencies and potential cracking or increased penetration time during electrolyte injection.
Innovation Solution
An electrode manufacturing apparatus equipped with a pair of rolls that rotate in opposite directions and a temperature adjusting unit, which reduces temperature differences between the central and end portions of the rolls, ensuring uniform thermal expansion and groove depth across the electrode width.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a conventional electrode manufacturing apparatus is used for large-area batteries, then production capacity is achieved, but uniformity of groove depth in the width direction deteriorates
Solution Approach 1:
The patent applies parameter changes by controlling the temperature distribution of the rolls during the grooving process. Specifically, the temperature of the rolls is adjusted to reduce thermal expansion differences between the central and end portions, thereby maintaining uniform groove depth across the width of large-area electrodes while preserving high production capacity
Solution Approach 2:
The patent directly addresses thermal expansion effects by controlling the temperature of the rolls. The temperature adjusting unit reduces temperature differences between the central and end portions of the rolls, compensating for thermal expansion variations that would otherwise cause non-uniform groove depth in large-area electrodes during high-speed production
2Manufacturing precision
If groove depth uniformity is maintained through temperature control, then manufacturing precision is improved, but device complexity increases
Solution Approach 1:
The patent applies local quality by implementing targeted temperature control at specific locations on the rolls. The temperature adjusting unit focuses on reducing temperature differences between the central and end portions of the rolls, applying thermal management locally where it is most needed to ensure groove depth uniformity without unnecessarily complicating the entire system
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
This configuration maintains the uniformity of groove depth, reduces cracking during conveyance, and enhances the efficiency of electrolyte penetration, thereby improving the productivity and quality of large-area battery electrodes.
Implementation Method 1
the uniformity of the thermal expansion between the central portion and the end portion of the roll can be improved
Data Source
AI summary
An electrode manufacturing apparatus includes a shaping roll and an opposed roll that sandwich an electrode therebetween and rotate in opposite directions, and a temperature adjusting unit. The temperature adjusting unit reduces a temperature difference between a central portion and an end portion in an axial direction, of at least one roll of the shaping roll and the opposed roll.