Electrode Glue Coating for Uniform EV Battery Adhesive Application
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Solution Overview
Problem
Current devices and processes fail to achieve uniform and reliable application of adhesive material on Electric Vehicle (EV) battery electrodes, leading to performance and reliability issues in EV battery manufacturing.
Innovation Solution
A coating device and process that includes an applicator to coat glue on both sides of an electrode sheet, guided by a roller assembly and supported by a bar, enabling high line speed application with precise glue thickness and pattern quality, and incorporating a closed-loop control system to ensure consistent coating.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If adhesive material is applied to electrode sheets in EV battery manufacturing, then bonding and structural integrity are improved, but coating uniformity and reliability deteriorate due to manufacturing process limitations
Solution Approach 1:
The patent implements a closed-loop control system that uses sensors to detect coating parameters in real-time and feeds this information back to the applicator mechanism. This feedback loop enables continuous adjustment of adhesive application parameters to maintain consistent coating quality and uniformity across all electrode sheets, directly resolving the contradiction between bonding reliability and coating uniformity.
Solution Approach 2:
The patent replaces traditional mechanical coating methods with a controlled dispensing system that uses automated positioning and material flow control. This substitution enables more precise delivery of adhesive material, ensuring uniform application thickness and pattern consistency while maintaining reliable bonding, thereby resolving the manufacturing precision issue.
2Manufacturing precision
If adhesive coating process is optimized for uniformity, then coating quality is improved, but manufacturing time increases
Solution Approach 1:
The patent implements a continuous coating process where the electrode sheet moves continuously through the applicator without interruption. The adhesive is applied in a continuous stream or pattern as the substrate moves, eliminating stopping and starting operations. This continuous action maintains coating uniformity while maximizing manufacturing speed, resolving the contradiction between quality and productivity.
Solution Approach 2:
The patent pre-configures the adhesive dispensing system with programmed patterns and pre-set material flow rates before production begins. The coating parameters are predetermined and automated, allowing the system to maintain high speed operation while consistently achieving uniform coating quality without requiring real-time manual adjustments that would slow production.
3Reliability
If adhesive is applied to both sides of electrode sheet, then bonding performance is improved, but process complexity increases
Solution Approach 1:
The patent combines the coating operations for both sides of the electrode sheet into a single integrated process. The applicator system is configured to deposit adhesive on both surfaces simultaneously or in immediate sequence during one pass through the equipment, eliminating the need for separate coating operations. This merging reduces process complexity while ensuring consistent bonding performance on both sides.
Solution Approach 2:
The patent designs the applicator system to perform multiple functions: it can apply adhesive to both sides of the electrode sheet, adjust coating patterns, and control material flow rates all within a single device configuration. This multi-functional design reduces the number of separate equipment pieces and process steps needed, thereby reducing overall process complexity while maintaining bonding performance.
Data Source
AI summary
A coating device includes at least one applicator configured to coat a glue onto two opposite sides of an electrode sheet; at least one roller assembly configured to guide the electrode sheet past the at least one applicator; and at least one support bar arranged under the at least one applicator.