Electrode Plate Drying With Compensation for Surface Density Uniformity
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Solution Overview
Problem
Existing drying methods for electrode plates cannot ensure a consistent drying effect on both sides, leading to uneven surface densities of the electrode layers, which affects the quality and performance of the electrode assembly and battery cell.
Innovation Solution
A manufacturing method and system that includes a compensation drying operation on the second electrode layer after the second drying, ensuring consistent drying effects by adjusting relevant parameters based on surface density measurements and using a compensation drying apparatus to precisely control the drying process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If electrode plates are coated and dried on one side first, then coated and dried on the other side, then the electrode layers on both sides can be formed, but the drying method cannot ensure a same degree of drying on the two sides, resulting in uneven surface density
Solution Approach 1:
The patent introduces a compensation drying operation that is performed in advance on the second electrode layer before the final drying step. This preliminary action ensures that both electrode layers will have consistent surface density after the complete drying process, resolving the uneven drying issue without requiring complex real-time monitoring systems.
Solution Approach 2:
The patent applies different drying strategies to different sides of the electrode plate. Specifically, the first electrode layer undergoes standard drying, while the second electrode layer receives additional compensation drying. This localized quality approach ensures that each side receives the appropriate drying treatment to achieve uniform surface density across both sides.
2Ease of manufacture
If batch processing is used to coat both sides of electrode plates, then the manufacturing process can be simplified, but the drying consistency between the two sides cannot be ensured
Solution Approach 1:
The patent segments the drying process into distinct stages: a first drying operation for the initial electrode layer, and a second drying operation that includes compensation drying for the second electrode layer. This segmentation allows batch processing simplicity to be maintained while achieving precise drying uniformity through the added compensation step.
Solution Approach 2:
The patent implements a feedback mechanism where the drying parameters for the second electrode layer are adjusted based on the drying performance of the first electrode layer. This feedback ensures that even in batch processing, both sides achieve consistent surface density by compensating for variations in the drying environment.
3Productivity
If the second electrode layer is dried together with the first electrode layer in the second drying operation, then the processing time is reduced, but the surface density of the second electrode layer differs from the first electrode layer
Solution Approach 1:
The patent changes the drying parameters during the process: the first drying operation uses standard parameters, while the compensation drying step adjusts parameters specifically for the second electrode layer. This parameter change allows both layers to be dried efficiently together while achieving consistent surface density through the compensated parameters.
Solution Approach 2:
The patent introduces dynamic adjustment to the drying process by adding a compensation drying step that adapts to the specific needs of the second electrode layer. This dynamic approach maintains high productivity by processing both layers together while ensuring precision through the adaptive compensation mechanism.
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 method ensures consistent surface densities of the electrode layers on both sides of the electrode plate, improving the quality and stability of the electrode assembly and ultimately enhancing the performance of the battery cell.
Implementation Method 1
performing a compensation drying operation on the second electrode layer of the current collector
Implementation Method 2
performing a first drying operation on the current collector with the first electrode layer formed thereon to dry the first electrode layer
Data Source
AI summary
A manufacturing method includes: applying an electrode slurry to a first surface of a current collector to form a first electrode layer on the first surface; performing a first drying operation on the current collector with the first electrode layer formed thereon to dry the first electrode layer; applying the electrode slurry to a second surface of the current collector after the first drying operation to form a second electrode layer on the second surface, the second surface being opposite the first surface; performing a second drying operation on the current collector having the first electrode layer and the second electrode layer formed thereon to dry both the first electrode layer and the second electrode layer; and performing a compensation drying operation on the second electrode layer of the current collector.