Electrospinning Apparatus for Separator-Integrated Electrode
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Solution Overview
Problem
Existing electrospinning apparatuses face challenges in depositing fibers uniformly on electrodes with coated portions, leading to increased internal stress and potential instability during the winding process, which can result in variations in battery performance and insulation failures.
Innovation Solution
The electrospinning apparatus transports electrodes side by side with uncoated portions at both ends, allowing fibers to be deposited uniformly over two adjacent electrodes, and includes a cutting section to ensure coverage of the side surfaces, while a pressurizing section fixes the fibers to prevent insulation failures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If fibers are deposited on the coated portion of the electrode using conventional electrospinning apparatus, then the separator is formed on the electrode, but the fiber thickness becomes non-uniform leading to increased internal stress and potential insulation failures
Solution Approach 1:
The patent applies local quality by transporting electrodes side by side with uncoated portions at both ends, allowing the electrospinning apparatus to deposit fibers uniformly only on the coated portions while avoiding the uncoated portions. This selective deposition ensures uniform fiber thickness where needed (on coated areas) while preventing deposition on uncoated areas, thereby resolving the contradiction between manufacturing precision and reliability.
Solution Approach 2:
The patent segments the electrode into coated portions and uncoated portions, and processes them differently during the electrospinning operation. By positioning uncoated portions at both ends and transporting electrodes side by side, the system creates distinct processing zones where fibers are deposited only on coated portions, ensuring uniform thickness and preventing insulation failures.
2Stability of the object's composition
If fibers are deposited on uncoated portions of the electrode, then complete surface coverage is achieved, but internal stress increases and winding stability decreases
Solution Approach 1:
The patent implements local quality by making different parts of the electrode receive different treatments during electrospinning. The coated portions receive uniform fiber deposition while uncoated portions at both ends are excluded from deposition. This selective approach ensures winding stability by preventing fiber accumulation on uncoated areas while maintaining precise deposition control on coated areas.
3Productivity
If conventional electrospinning is used to deposit fibers on electrodes, then the separator-integrated electrode is manufactured, but productivity is reduced due to non-uniform deposition requiring rework
Solution Approach 1:
The patent achieves continuity of useful action by implementing a continuous transport mechanism that moves multiple electrodes side by side through the electrospinning apparatus. This allows uninterrupted fiber deposition on coated portions while automatically excluding uncoated portions at both ends, eliminating the need for rework and improving manufacturing efficiency without sacrificing precision.
Solution Approach 2:
By segmenting the electrode into coated and uncoated portions and processing them differently during continuous transport, the system achieves both high productivity and manufacturing precision. The segmentation allows the electrospinning apparatus to focus deposition energy only on coated portions, ensuring uniform fiber thickness while maintaining continuous production flow.
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 approach stabilizes the winding process, suppresses variations in battery performance, and prevents insulation failures by ensuring uniform fiber thickness on coated areas and avoiding deposition on uncoated portions, thereby improving productivity and battery reliability.
Implementation Method 1
an electrospinning apparatus for depositing fine fibers on the surface of a member by an electrospinning method (also referred to as an electrospinning method or a charge induction spinning method)
Data Source
AI summary
According to one embodiment, an electrospinning apparatus deposits a fiber on an electrode. The apparatus includes a transport section and a fiber deposition section. The transport section transports electrodes. The fiber deposition section deposits the fiber on first and second surfaces of the electrodes. The electrodes include coated and uncoated portions. The transport section transports the electrodes in a third direction in the fiber deposition section. The electrodes include first and second electrodes. The first electrode is positioned at one end in the second direction and transported so that the uncoated portion of the first electrode protrudes toward the one end side. The second electrode is positioned at other end in the second direction and transported so that the uncoated portion of the second electrode protrudes toward the other end side.