Dry Electrode Powder Feeding for Uniform High-Speed Film Pressing
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Solution Overview
Problem
The dry electrode manufacturing process faces challenges in achieving high-speed film formation necessary for mass production due to the powdery state of the dry electrode mixture, leading to uneven film thickness and potential tearing during high-speed processing.
Innovation Solution
A film formation improvement apparatus is introduced, which includes a roll press and a system to induce the flow of the powder mixture in the feeding zone, using blades and a guide to ensure uniform distribution and prevent concentration, thereby facilitating high-speed film formation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If high-speed film formation is attempted in the dry process, then productivity increases, but film quality deteriorates due to uneven thickness and tearing
Solution Approach 1:
The patent applies preliminary action by introducing a feeding zone with blades and guides before the main pressing rolls. This zone pre-distributes and orients the powder mixture uniformly before it enters the high-speed pressing stage, preventing concentration issues and enabling high-speed operation without sacrificing film thickness uniformity
Solution Approach 2:
The patent introduces an intermediary feeding zone with blades and guide structures between the powder supply and the main pressing rolls. This intermediary zone acts as a mediator that conditions the powder flow, ensuring uniform distribution and preventing direct contact issues that would cause uneven thickness at high speeds
2Productivity
If high-speed film formation is attempted in the dry process, then productivity increases, but reliability decreases due to film tearing
Solution Approach 1:
The feeding zone with blades performs preliminary action by pre-distributing and orienting the powder mixture uniformly before pressing. This preliminary conditioning prevents concentration and ensures even pressure distribution during high-speed operation, eliminating the conditions that lead to film tearing and maintaining reliability at high productivity
3Ease of manufacture
If the dry process is used instead of wet process, then manufacturing cost and time are reduced, but film formation quality control becomes difficult
Solution Approach 1:
The patent maintains the advantages of the dry process while adding a feeding zone with blades and guides that performs preliminary distribution and orientation of the powder mixture. This preliminary action enables the dry process to achieve both cost/time efficiency and precise film thickness control by ensuring uniform powder distribution before pressing
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 apparatus enables the formation of dry electrode films at high speeds while maintaining film quality, preventing uneven thickness and tearing, and ensuring consistent film production.
Implementation Method 1
a roll press configured to apply pressure to supplied powder to be formed into the film
Implementation Method 2
rotating the roll press and blade located in the feeding zone while providing pressing force to the roll press
Data Source
AI summary
Disclosed is a film formation improvement apparatus for powders, more particularly, a film formation improvement apparatus for dry electrode mixtures. An apparatus for manufacturing a film includes a roll press configured to apply pressure to supplied powder to be formed into a film, and the film formation improvement apparatus configured to induce a flow of the powder fed into a feeding zone of the roll press in a predefined direction.