Electrode Drying Control Using Color Feedback
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Solution Overview
Problem
Existing electrode drying processes lack real-time quality control and adaptive drying condition management, leading to inconsistent electrode quality and increased defect rates.
Innovation Solution
An electrode drying apparatus and method that utilizes a color coordinate measuring unit to assess the drying quality of electrodes in real time, with a controller adjusting drying conditions based on measured color coordinates, including temperature and humidity considerations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the amount of drying heat is excessive, then the drying speed is improved, but the adhesive force of the electrode is reduced
Solution Approach 1:
The patent applies dynamics by making the drying conditions adjustable and controllable in real-time. The controller dynamically adjusts drying parameters (temperature, time, heat intensity) based on measured electrode quality data, allowing the system to optimize between drying speed and adhesive force preservation rather than using fixed excessive heat
Solution Approach 2:
The patent implements feedback control by measuring electrode quality indicators (such as color coordinates indicating binder distribution) during or after drying, then using this measurement to adjust subsequent drying conditions. This closed-loop feedback prevents excessive heat application that would damage adhesive force while maintaining efficient drying speed
2Strength
If the amount of drying heat is low, then the adhesive force is preserved, but the solvent remains in the electrode causing roll contamination
Solution Approach 1:
The system dynamically adjusts drying heat intensity based on real-time quality measurements, allowing sufficient heat to be applied to evaporate solvents and prevent roll contamination while stopping before excessive heat damages adhesive force. This dynamic control resolves the contradiction between removing harmful solvents and preserving bond strength
Solution Approach 2:
Feedback control measures electrode drying quality (such as color coordinates that indicate solvent content and binder distribution) and uses this information to adjust drying conditions. This ensures enough heat is applied to remove solvents and prevent contamination while preventing excessive heat that would reduce adhesive force
3Manufacturing precision
If real-time quality measurement and control is implemented, then electrode quality consistency is improved, but device complexity increases
Solution Approach 1:
The patent replaces complex mechanical or manual quality assessment methods with optical measurement (color coordinate measurement). This substitution provides real-time, objective quality data with simpler measurement equipment, improving manufacturing precision without proportionally increasing device complexity
Solution Approach 2:
The feedback control system uses relatively simple color coordinate measurement and basic controller logic to achieve sophisticated real-time quality management. This approach delivers high manufacturing precision through automated feedback while keeping the added device complexity manageable through the use of straightforward measurement and control mechanisms
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 enables real-time monitoring and adjustment of drying conditions, significantly improving electrode quality by reducing defects and ensuring consistent adhesive force and drying completeness.
Implementation Method 1
a color coordinate measuring unit configured to be positioned at an outlet of the oven and measure a color coordinate value of an electrode active material layer with respect to the dried electrode
Implementation Method 2
The positive electrode and the negative electrode are formed by applying a positive electrode slurry containing a positive electrode active material and a negative electrode slurry containing a negative electrode active material to a positive electrode current collector and a negative electrode current collector, to thereby form a positive electrode active material layer and a negative electrode active material layer, respectively, followed by drying and rolling them
Implementation Method 3
the amount of heat for drying the electrode is supplied by hot air and infrared heaters
Implementation Method 4
the amount of heat for drying the electrode is supplied by hot air and infrared heaters
Data Source
AI summary
The present invention relates to an electrode drying apparatus and an electrode drying method, and the electrode drying apparatus includes: an oven configured to provide a space in which the electrode is dried and to include a hot air nozzle or an infrared heater; a color coordinate measuring unit configured to be positioned at an outlet of the oven and measure a color coordinate value of an electrode active material layer with respect to the dried electrode; and a controller configured to analyze a drying result of the electrode from the color coordinate value, determine whether the electrode is defective in drying, and control a drying condition of the electrode.