Electrode Forming Roll Heating for Uniform Coating Density
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Solution Overview
Problem
Existing methods for manufacturing electrode formed bodies face challenges in achieving uniform mass distribution and adhesiveness between the electrode material and the support, particularly due to support deformation at higher heating temperatures and reduced density at lower temperatures.
Innovation Solution
A method involving the preparation and supply of an electrode material onto a support, followed by pressurization using a pair of rolls where the temperature of the first roll (T1) is greater than the temperature of the second roll (T2), with specific pressure and temperature ranges to ensure uniformity and adhesiveness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the heating temperature is increased to increase the density of electrode material, then the density increases, but the support may be deformed leading to non-uniform mass distribution
Solution Approach 1:
The heating process is segmented into two distinct stages with different temperature profiles. The first stage uses a higher temperature to increase electrode material density, while the second stage uses a lower temperature to prevent support deformation, thereby achieving both high density and uniform mass distribution
Solution Approach 2:
The temperature parameter is dynamically changed during the heating process. By adjusting the temperature from a higher initial value to a lower final value, the process achieves both density increase and support stability, resolving the contradiction between these two requirements
2Stability of the object's composition
If the heating temperature is reduced to prevent support deformation, then the support stability improves, but the electrode material cannot be formed at high density and adhesiveness decreases
Solution Approach 1:
The heating process is divided into two stages: an initial high-temperature stage to achieve high electrode material density and adhesiveness, followed by a low-temperature stage to maintain support stability. This temporal segmentation allows both contradictory requirements to be satisfied at different times
Solution Approach 2:
The high-temperature treatment is applied preliminarily before the low-temperature treatment. By first achieving high density and adhesiveness at elevated temperature, then maintaining support stability at lower temperature, the process ensures both electrode quality and support integrity
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 method effectively suppresses support deformation while achieving high-density electrode formation with improved uniformity of mass distribution and adhesiveness between the electrode material and the support.
Implementation Method 1
pressurizing the electrode material on the support by sandwiching the support and the electrode material between a first roll that is brought into contact with the electrode material and a second roll that is brought into contact with the support, in which a temperature T1 of the first roll and a temperature T2 of the second roll satisfy a relationship T1>T2
Data Source
AI summary
The present disclosure provides a method of manufacturing a formed body for an electrode including: a step of preparing an electrode material containing an electrode active material; a step of supplying the electrode material onto the support; and a step of pressurizing the electrode material on the support by sandwiching the support and the electrode material between a first roll that is brought into contact with the electrode material and a second roll that is brought into contact with the support, in which a temperature T1 of the first roll and a temperature T2 of the second roll satisfy a relationship T1>T2.