Battery Electrode Drying Control for Surface Area Uniformity
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The specific surface area of electrode active materials in rechargeable batteries can vary significantly during the manufacturing process, affecting battery performance and uniformity, as existing methods do not effectively control these variations to achieve consistent performance.
Innovation Solution
A method and apparatus that measure the specific surface area of electrode active materials before and after drying, adjusting the drying conditions, such as temperature and time, to minimize variations and achieve a target specific surface area, thereby improving battery performance uniformity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the electrode mixture is dried using a fixed drying condition, then the manufacturing process is simple, but the electrode plate specific surface area varies significantly affecting battery performance uniformity
Solution Approach 1:
The patent measures the specific surface area of the electrode active material before drying (obtained specific surface area) and uses this measurement to determine the appropriate drying condition. This preliminary measurement allows the system to pre-adjust drying parameters (temperature, time) based on the actual material properties, ensuring that the electrode plate specific surface area after drying falls within the target range, thereby resolving the contradiction between manufacturing precision and process simplicity
Solution Approach 2:
The patent implements a feedback mechanism where the obtained specific surface area measurement informs the drying condition selection. The system calculates the difference between the obtained specific surface area and a predetermined standard value, then adjusts the drying condition accordingly to correct this deviation. This feedback loop ensures consistent electrode plate specific surface area while maintaining a relatively simple manufacturing process
2Reliability
If the specific surface area of electrode active material is not controlled, then the manufacturing process is fast, but battery performance uniformity deteriorates
Solution Approach 1:
The patent performs a preliminary measurement of the specific surface area of the electrode active material before the drying process. This early measurement allows for immediate adjustment of drying conditions to ensure the final electrode plate specific surface area meets specifications, thereby guaranteeing battery performance uniformity without significantly extending the manufacturing cycle
Solution Approach 2:
The patent adjusts drying parameters (temperature and time) based on the measured obtained specific surface area. By changing these parameters dynamically according to the actual material properties, the system ensures consistent electrode plate specific surface area and battery performance while maintaining efficient production rates
3Productivity
If drying temperature is increased to reduce drying time, then productivity improves, but the specific surface area control precision deteriorates
Solution Approach 1:
The patent makes the drying temperature dynamic rather than fixed. The drying temperature is adjusted based on the obtained specific surface area measurement and the target specific surface area requirement. This dynamic adjustment allows the system to optimize drying speed while maintaining precise control over the electrode plate specific surface area, resolving the contradiction between productivity and precision
Solution Approach 2:
The patent changes the drying temperature parameter according to the specific surface area requirements. By adjusting the temperature based on the obtained specific surface area and desired target value, the system achieves both efficient drying and precise control of the electrode plate specific surface area, balancing productivity and 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 effectively reduces variations in the specific surface area of electrode active materials, enhancing the uniformity and performance of rechargeable batteries by setting optimal drying conditions based on initial surface area measurements.
Implementation Method 1
drying the applied electrode mixture
Data Source
AI summary
A method for manufacturing a rechargeable battery including applying an electrode mixture that includes an electrode active material to a substrate that becomes a current collector, drying the applied electrode mixture, obtaining a specific surface area of the electrode active material before the drying the applied electrode mixture, in which the obtained specific surface area of the electrode active material is referred to as an obtained specific surface area, and a specific surface area of the electrode active material in a state in which the electrode mixture applied to the substrate forms an electrode plate is referred to as an electrode plate specific surface area; and adjusting the electrode plate specific surface area after the drying the applied electrode mixture by setting a drying condition of the electrode mixture in accordance with the obtained specific surface area.