Battery Electrode Web Stretching for Continuous Flow Separation
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Solution Overview
Problem
Existing methods for producing battery electrodes are inefficient and require individual processing steps, leading to potential electrical short circuits and inefficiencies in the production process.
Innovation Solution
A method for continuous production of electrodes involves structuring a web-shaped starting material with an expanded metal structure, stretching it to separate electrode regions, and then tearing or cutting them apart to form individual electrodes, ensuring controlled particle emissions and easy handling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If individual processing steps are used for each electrode, then processing precision can be maintained, but productivity decreases and production time increases
Solution Approach 1:
Multiple electrode processing operations (structuring, stretching, and partial separation) are merged into a single continuous flow production line where electrodes are processed simultaneously while remaining connected via the expanded metal structure, eliminating the need for separate individual processing steps
Solution Approach 2:
The expanded metal structure is pre-formed and integrated into the electrode material before final separation, enabling electrodes to be processed and transported together in advance while maintaining their individual integrity for subsequent stacking operations
2Ease of operation
If electrodes are completely separated early in the process, then individual handling is simplified, but electrical short circuits may occur and handling complexity increases
Solution Approach 1:
The electrode web is segmented into individual electrode regions that are connected by the expanded metal structure, allowing each region to be treated as a separate unit while maintaining physical connection through the stretchable metal framework
Solution Approach 2:
The expanded metal structure acts as an intermediary connection between adjacent electrodes, providing mechanical support and electrical isolation during processing while allowing controlled separation when needed
3Productivity
If continuous flow production is implemented, then productivity increases, but device complexity increases
Solution Approach 1:
The production process operates continuously with the web-shaped starting material moving through structuring, stretching, and separation stages without interruption, maintaining constant production flow and eliminating idle time between electrode processing cycles
Solution Approach 2:
The physical state and properties of the expanded metal structure are changed during processing (from unexpanded to expanded state), enabling it to transition between connected and separated configurations without requiring complex mechanical intervention
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
Enables continuous processing of electrodes, reducing particle emissions and preventing electrical short circuits, while allowing for efficient transportation and easy separation into individual electrodes.
Implementation Method 1
When the expanded metal structure is stretched, the webs and nodes are deformed, and approximately diamond-shaped openings, known as meshes, open between the webs and nodes
Implementation Method 2
The electrode areas can be separated from each other by tearing the expanded metal structure
Data Source
Figure 1
Figure 2a~2d
Figure 3a~3b
AI summary
The invention relates to a method for the flow production of electrodes (102) for a battery, which method is characterized in that a web-shaped starting material (200) is provided, in a structuring step at least one expanded mesh structure (210) and one separating cut are cut into the starting material (200) in order to define adjacent electrode regions (204), the starting material (200) remaining partially uncut in the region of the expanded mesh structure (210), in a stretching step the electrode regions (204) are pulled apart in order to stretch the expanded mesh structure (210), and in an isolating step the electrode regions (204) are separated from each other at the expanded mesh structure (210) in order to obtain individual electrodes (102).