Winding Core Particle Removal for Reliable Electrode Assembly
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Solution Overview
Problem
Conventional jelly roll type electrode assembly manufacturing processes are hindered by the inefficient removal of metallic and non-metallic foreign particles, which can lead to low voltage and short circuits due to their presence on the electrodes and separation film during the winding process.
Innovation Solution
A winding device with a foreign particle remover surrounding the winding core, featuring a cylindrical structure with an inlet for inputting the electrode and separation film, and optionally incorporating a magnet to separate metallic particles, ensures efficient removal of foreign particles by discharging them through the main body portion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a local foreign particle removing device is installed at the electrode and separation film input portions, then the device complexity is reduced, but the foreign particle removal efficiency deteriorates because particles from various spots cannot be efficiently removed
Solution Approach 1:
The winding device is divided into multiple independent suction units, each responsible for a specific region (edge portion and central portion). Each suction unit has its own suction hole and suction force generation unit, allowing localized foreign particle removal while maintaining overall system simplicity.
Solution Approach 2:
The suction holes are arranged in different spatial dimensions - edge suction holes along the peripheral edge and central suction holes in the central region. This multi-dimensional arrangement enables comprehensive coverage of foreign particles from various input locations without increasing device complexity.
2Ease of manufacture
If the winding device operates without comprehensive foreign particle removal, then the manufacturing process is simple, but the electrode assembly reliability deteriorates due to low voltage and short circuits caused by foreign particles
Solution Approach 1:
The mechanical suction system replaces complex mechanical cleaning mechanisms. By using suction force generation units to create negative pressure fields, foreign particles are removed through fluid dynamics rather than mechanical contact, simplifying the manufacturing process while ensuring reliable foreign particle removal.
Solution Approach 2:
Air flow acts as an intermediary medium to transport foreign particles from various input locations to collection points. The suction holes and air flow paths enable indirect removal of particles without direct mechanical intervention, maintaining manufacturing simplicity while improving reliability.
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 design effectively prevents foreign particles from entering the winding core, thereby enhancing the manufacturing process by reducing the likelihood of voltage drops and short circuits, ensuring higher reliability and performance of the electrode assembly.
Implementation Method 1
a suction hole configured to suck the foreign particle from the electrode and the separation film, and a suction force generation unit configured to generate suction force supplied to the suction hole
Implementation Method 2
optionally incorporating a magnet to separate metallic particles
Data Source
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AI summary
The present invention relates to a winding device for manufacturing an electrode assembly including: a main body portion; a winding core for winding an electrode and a separation film; and a foreign particle remover connected to the main body portion and removing foreign particles, wherein the foreign particle remover is formed to surround the winding core while separated from the winding core.