Battery Electrode Rolling With Decoupled Pressure Points
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Solution Overview
Problem
The challenge in manufacturing battery electrodes lies in efficiently producing components at a large scale while maintaining reliability, particularly due to issues with controlling shearing and compression operations and preventing process variations in film thickness and density.
Innovation Solution
A system with decoupled pressure points, where each pressure point defines a tangent line extending tangent to the roller's surface, allowing for independent control of forces applied at each point to form and laminate battery active materials with current collector materials, thereby isolating forces and reducing process variations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple pressure points are used to form and laminate battery active material, then manufacturing efficiency is improved, but process variations in film thickness and density increase
Solution Approach 1:
The system divides the pressure application into multiple independent pressure points (first pressure point for forming, second pressure point for laminating) with decoupled tangent lines. Each pressure point can be independently controlled to apply force to the battery active material, allowing simultaneous formation and lamination operations while maintaining precise control over film thickness and density at each stage.
Solution Approach 2:
Different pressure points are designed with specific local functions: the first pressure point optimizes for forming the battery active material into a film, while the second pressure point optimizes for laminating the film to the current collector. Each pressure point's tangent line is independently oriented to optimize its specific function, enabling localized quality control throughout the manufacturing process.
2Device complexity
If forces at multiple pressure points are coupled, then device complexity is reduced, but manufacturing precision deteriorates due to force interference
Solution Approach 1:
The force application system is segmented into independent force vectors at each pressure point. The first tangent line at the first pressure point and the second tangent line at the second pressure point are decoupled, meaning they are oriented at different angles and do not interfere with each other. This allows independent control of forces at each pressure point while maintaining a relatively simple overall system structure.
Solution Approach 2:
The tangent lines at different pressure points are intentionally designed with asymmetric orientations relative to each other. The first tangent line and second tangent line intersect at an angle, creating asymmetric force application paths that prevent force coupling and interference, thereby maintaining manufacturing precision without requiring complex decoupling mechanisms.
3Manufacturing precision
If rollers with varying diameters are used, then manufacturing precision is improved, but facility footprint increases
Solution Approach 1:
Instead of arranging rollers in a linear sequence along a single dimension, the system uses pressure points with tangent lines oriented in different directions (different angular dimensions). This allows multiple pressure points with varying roller diameters to be compactly arranged in a two-dimensional space, maintaining precise film thickness control while minimizing the facility footprint.
Solution Approach 2:
The system with decoupled pressure points and intersecting tangent lines allows for a compact arrangement where multiple rollers can be nested or closely positioned in space. The independent force vectors enable the system to accommodate rollers of different diameters in a compact configuration without requiring excessive linear space, thereby reducing the overall facility footprint while maintaining manufacturing precision.
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 improves the manufacturing process by allowing for better control of film thickness and density, reducing defects, and enabling the use of rollers with varying diameters, leading to higher quality electrodes and a more compact manufacturing facility.
Implementation Method 1
a first pressure point to receive and apply force to a battery active material (e.g., electrode active material) to form a film
Implementation Method 2
The first roller and the second roller can apply force to a battery active material received between the first roller and the second roller to form a film
Implementation Method 3
The system can isolate forces applied at the first pressure point from forces applied at the second pressure point by including intersecting first and second tangent lines to decouple the first pressure point from the second pressure point
Implementation Method 4
a third pressure point to laminate the film to a current collector material
Data Source
AI summary
Manufacture of battery electrodes with decoupled pressure points is provided. For example, a system to manufacture a battery electrode can include a first roller and a second roller that define a first tangent line. The first roller and the second roller can apply force to a battery active material received between the first roller and the second roller to form a film. The second roller and a third roller can define a second tangent line that intersects the first tangent line. The second roller and the third roller can apply force to the film received between the second roller and the third roller.