Gas-Discharge Press Roller for Uniform Electrode Sheet Forming
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Solution Overview
Problem
The issue of electrode material particles easily embedding in the surface of rollers during the rolling process leads to waste and affects the product yield and uniformity of electrode films in battery production.
Innovation Solution
An apparatus and process utilizing a first roller with a gas outlet structure and circumferentially distributed gas discharge on its surface to apply an outward pushing force on the electrode material, preventing it from adhering to the roller surface, and ensuring uniform film thickness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If electrode material particles are embedded in the roller surface to ensure good rolling effect, then rolling quality is improved, but electrode material is wasted and product yield decreases
Solution Approach 1:
The patent introduces a gas outlet structure within the roller that releases gas during the rolling process. This pneumatic mechanism creates an outward pushing force on the electrode material particles, preventing them from embedding in the roller surface while maintaining effective rolling compression. The gas pressure counteracts the adhesion between particles and roller surface, eliminating material waste without compromising rolling quality.
2Loss of substance
If gas is discharged through cylinder gas discharge structure, then electrode material adhesion is prevented, but device complexity increases
Solution Approach 1:
The gas outlet structure is nested within the roller's internal cavity, utilizing the existing roller structure. The gas discharge channels are integrated into the roller body itself, with the outlet structure forming a compact, space-efficient configuration that minimizes additional components while achieving the adhesion prevention function.
Solution Approach 2:
The roller structure serves dual functions: it performs the mechanical rolling operation and simultaneously houses the gas outlet structure for adhesion prevention. The roller body itself acts as the gas containment and distribution system, eliminating the need for separate external gas delivery mechanisms and reducing overall device complexity.
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
Prevents electrode material waste and ensures uniform thickness of the electrode film, thereby improving product yield and quality.
Implementation Method 1
the gas outlet structure in the inner cavity of the cylinder of the first roller discharges gas outward through the circumferentially distributed cylinder gas discharge structure on the surface of the cylinder of the first roller, thereby applying an outward pushing force relative to the surface of the cylinder of the first roller to the electrode material
Data Source
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AI summary
The present application provides an electrode sheet forming device, an electrode sheet forming process, and a press roller for electrode sheet forming. The electrode sheet forming device comprises a first press roller and a second press roller, a roller inner cavity of the first press roller is provided with an air outlet structure, the air outlet structure is connected to an air supply device, and the roller surface of the first press roller is provided with a roller exhaust structure circumferentially distributed; the second press roller and the first press roller are oppositely disposed, and a gap for an electrode material to be rolled into an electrode film is provided between the first press roller and the second press roller.