Electrode Roll With Replaceable Film to Block Active Material Transfer
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Solution Overview
Problem
The issue arises when sheet-like electrode base materials are wound around a cylindrical member, as particles of the positive electrode active material can adhere to the cylindrical member, leading to damage and reduced production efficiency due to static electricity or vibration, resulting in irregularities and decreased conforming articles.
Innovation Solution
A removable flexible film is provided on the peripheral surface of the cylindrical member, using a double-sided tape with different adhesive strengths to prevent active material particles from adhering to the sheet-like electrode base material, allowing for easy replacement and maintaining the integrity of the material.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the sheet-like electrode base material is wound around the cylindrical member for cutting, then the production process can proceed efficiently, but particles of the positive electrode active material may adhere to the cylindrical member, causing damage to subsequent materials and reducing production efficiency
Solution Approach 1:
A flexible film is introduced as an intermediary between the cylindrical member and the sheet-like electrode base material. The flexible film prevents direct contact between the active material particles and the cylindrical member, thereby eliminating the adhesion problem while allowing the winding and cutting process to continue efficiently
Solution Approach 2:
The flexible film is designed as a consumable component that can be easily replaced. When the flexible film becomes contaminated with active material particles, it is discarded and replaced with a new one, avoiding the need to clean or repair the cylindrical member and minimizing production downtime
2Duration of action of stationary object
If the cylindrical member is repeatedly used for winding electrode base materials, then production continuity is maintained, but static electricity or vibration may draw adhered particles into subsequent materials, causing damage and reducing conforming articles
Solution Approach 1:
The flexible film serves as a protective intermediary layer that prevents direct interaction between the cylindrical member and the electrode material. This intermediary barrier eliminates the mechanism by which particles could be drawn into subsequent materials through static electricity or vibration, ensuring consistent material integrity across multiple production cycles
Solution Approach 2:
The flexible film is pre-installed on the cylindrical member before the electrode base material is wound. This preliminary protective measure ensures that no particles can adhere to the cylindrical member during the winding process, preventing contamination before it can occur
3Speed
If active material particles are pressed onto the sheet-like electrode base material during winding, then production speed is maintained, but shapes of particles are transferred onto the material and damage occurs, reducing conforming articles
Solution Approach 1:
The flexible film acts as a protective barrier between the active material particles and the sheet-like electrode base material during the winding process. This intermediary layer prevents direct contact and pressure transfer, eliminating particle shape transfer and surface damage while allowing high-speed winding to continue without quality degradation
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 solution prevents the transfer of active material particles onto the sheet-like electrode base material, reducing damage and improving production efficiency by ensuring stable electric characteristics and reliability in the battery manufacturing process.
Implementation Method 1
a flexible film 400 is provided on the peripheral surface 220 of the cylindrical member 200
Data Source
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AI summary
To provide an electrode roll capable of preventing lowering of production efficiency due to active material particles that have fallen. An electrode roll (600) in which a sheet-like electrode base material (500) which is subjected to cutting to be an electrode used for an electrochemical element is rolled, including a resin cylindrical member (200) having a peripheral surface (220) with a predetermined width, a flexible film (400) to be attached/detached with respect to the peripheral surface, and the sheet-like electrode base material (500) wound on the flexible film (400).