Electrode Plate Pressing With Feedback-Controlled Uncoated Heating
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Solution Overview
Problem
The quality of electrode plates in secondary batteries is unstable due to variations in the temperature of the uncoated parts during induction heating annealing (IHA) caused by small movements, leading to potential breakage and inconsistent pressing results.
Innovation Solution
An apparatus and method that includes a temperature detector to monitor the uncoated part of the electrode plate, an induction heating annealing (IHA) part to maintain the temperature within a reference range, and a pressing part to ensure stable quality by controlling the IHA location and output based on detected temperature.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If induction heating annealing (IHA) is performed on the uncoated part of the electrode plate, then the breakage of the electrode plate is prevented, but the temperature control becomes difficult due to small movements of the electrode plate
Solution Approach 1:
The patent performs induction heating annealing on the uncoated part before the pressing process to increase the elongation rate of the foil. By conducting the heating treatment in advance, the electrode plate becomes more resistant to breakage during subsequent pressing operations. The uncoated part is specifically targeted for heating to modify its mechanical properties prior to the main processing step.
Solution Approach 2:
The patent applies induction heating specifically to the uncoated part of the electrode plate rather than the entire plate. This localized heating approach allows for precise temperature control in the critical uncoated region, increasing the elongation rate where it is most needed without unnecessarily heating the coated active material regions, thus preventing breakage while maintaining manufacturing precision.
2Ease of operation
If the output value and output location of IHA are fixed by user setting, then the operation is simple, but the quality of electrode plate becomes unstable due to fine movement of the electrode plate
Solution Approach 1:
The patent employs a temperature detector to monitor the temperature of the uncoated part in real-time during the induction heating process. The detected temperature information is fed back to the control unit, which adjusts the output value and output location of the IHA accordingly. This feedback mechanism ensures that the temperature remains within the reference range even when the electrode plate moves, maintaining quality stability while keeping the operation relatively simple.
3Productivity
If the temperature of the uncoated part is not maintained within reference range, then the pressing process can be performed quickly, but the electrode plate may break and quality becomes inconsistent
Solution Approach 1:
The control unit continuously monitors the temperature of the uncoated part via the temperature detector and adjusts the IHA parameters in real-time to maintain the temperature within the reference range. This feedback control ensures that the electrode plate achieves the necessary thermal state for pressing without overheating or underheating, enabling consistent quality outcomes while maintaining efficient processing speed.
Solution Approach 2:
The patent dynamically adjusts the output value and output location parameters of the induction heating system based on real-time temperature measurements. By changing these parameters adaptively, the system maintains optimal temperature conditions for the uncoated part, ensuring both the structural integrity needed to prevent breakage and the processing efficiency required for consistent productivity.
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 apparatus and method prevent breakage of electrode plates and ensure consistent quality by maintaining the uncoated part's temperature within an optimal range, even with small movements, thereby enhancing the stability and efficiency of the pressing process.
Implementation Method 1
Upon induction heating annealing (IHA), the foil is heated by forming a strong AC magnetic field
Implementation Method 2
induction heating annealing (IHA) method may be used prior to the pressing process
Implementation Method 3
a temperature detector configured to detect a temperature of the uncoated part
Implementation Method 4
The electrode plate on which the coating process has been finished is compressed through a pressing process, thus improving battery efficiency
Data Source
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AI summary
An apparatus for pressing an electrode plate (200) is provided. The electrode plate (200) includes a coating part (210) having an active material coated on one surface thereof and an uncoated part (220) without an active material coated thereon adjoining the coating part. The apparatus includes: a temperature detector (110) configured to detect a temperature of the uncoated part; an induction heating annealing, IHA, part (120) configured to perform IHA on the uncoated part so that the temperature of the uncoated part detected by the temperature detector (110) is maintained within a reference range of a reference temperature; and a pressing part configured to press the electrode plate (200) after the uncoated part has been heated by the IHA part (120).