Multilayer Electrode Transfer Process for Thickness and Bonding Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing methods for manufacturing rechargeable lithium batteries struggle to precisely control the coating thickness of multilayer electrodes and ensure strong bonding between electrode substrates and active material layers, limiting the performance of these batteries.
Innovation Solution
A roll-to-roll type continuous process using a multilayer electrode manufacturing apparatus that includes supply rolls, pressurizing units, and recovery rolls to unwind and pressurize electrode substrates and active material layers, allowing for precise control of coating thickness and enhanced bonding through sequential stacking and separation of release films.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional coating methods are used to deposit active material layers, then the manufacturing process is simple, but the coating thickness cannot be precisely controlled
Solution Approach 1:
The active material layers are pre-formed on release films before being transferred to the electrode substrate. This preliminary preparation allows precise control of layer thickness during the coating stage on the release film, which can then be accurately transferred to the final substrate, resolving the contradiction between precision and complexity.
Solution Approach 2:
A release film is introduced as an intermediary carrier that temporarily holds the active material layers during manufacturing. This intermediary enables precise thickness control during the coating process on the release film while simplifying the transfer process to the electrode substrate, thereby achieving precision without excessive complexity.
2Strength
If conventional bonding methods are used to attach active material layers to electrode substrates, then the process is straightforward, but the bonding force is insufficient
Solution Approach 1:
The active material layers are pre-formed and prepared on the release film with appropriate adhesion properties before transfer. This preliminary preparation ensures optimal bonding conditions are established before the layers are attached to the electrode substrate, enhancing bonding force without significantly complicating the manufacturing process.
Solution Approach 2:
The release film serves as an intermediary that facilitates controlled transfer and bonding of active material layers to the electrode substrate. This intermediary enables enhanced bonding force through controlled contact and pressure application during transfer, while maintaining relative ease of manufacture through the continuous processing approach.
3Productivity
If discrete layer-by-layer assembly is used to build multilayer electrodes, then each layer can be precisely controlled, but the manufacturing efficiency is low
Solution Approach 1:
Multiple active material layers are combined on a single continuous release film before transfer to the electrode substrate. This merging approach allows simultaneous processing of multiple layers, significantly improving manufacturing efficiency while maintaining precise thickness control through the coordinated advancement of the release film and substrate through pressurizing units.
Solution Approach 2:
The manufacturing process uses continuous rolls for the electrode substrate and release film that move through the system without interruption. This continuity enables uninterrupted deposition and transfer of multiple active material layers, dramatically improving productivity while maintaining precision through controlled film advancement and synchronized pressurization at each transfer stage.
4Loss of time
If multiple separate processing steps are used to deposit each active material layer, then each layer can be optimized independently, but the overall process time increases
Solution Approach 1:
Multiple active material layers are deposited and processed on a single continuous release film in sequence before transfer. This merging of processing steps allows independent optimization of each layer's thickness and properties during deposition, while the continuous film approach minimizes handling time and maintains precision throughout the multi-layer process.
Solution Approach 2:
The continuous roll-to-roll processing enables uninterrupted deposition of multiple active material layers on the release film. Each layer can be optimized independently during its deposition phase, while the continuous movement of the film through the system minimizes idle time and maintains manufacturing precision through consistent processing conditions across all layers.
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 process enables precise adjustment of active material layer thickness and improves bonding force between electrode substrates and active material layers, enhancing the performance of rechargeable lithium batteries.
Implementation Method 1
a first pressurizing unit configured to pressurize together the electrode substrate, the first active material layer, and the first release film that are sequentially stacked
Data Source
AI summary
A multilayer electrode manufacturing apparatus includes: an electrode substrate supply roll configured to unwind an electrode substrate; a first upper supply roll configured to unwind a first upper film, the first upper film including a first release film and a first active material layer on the first release film; a first pressurizing unit configured to pressurize together the electrode substrate, the first active material layer, and the first release film that are sequentially stacked; and a first upper recovery roll configured to recover the first release film by separating the first release film from the first active material layer.