Electrode Sheet Pressure Roll Control for Uncoated Flatness
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Solution Overview
Problem
The existing electrode manufacturing processes often result in wrinkles, folds, or swells in the uncoated portions of electrode sheets due to thickness differences between coated and uncoated areas, leading to defects and reduced facility efficiency and productivity.
Innovation Solution
An electrode manufacturing apparatus featuring a support roll, a pressure roll that moves to pressurize the uncoated portion detected by a level sensor, and a suction roll with symmetrical suction holes to maintain tension, ensuring the uncoated portion remains flat and defect-free.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the electrode sheet is transported using a support roll, then the electrode sheet can be moved through the manufacturing process, but wrinkles and folds occur in the uncoated portion due to thickness differences
Solution Approach 1:
The pressure roll is designed with a specific width that corresponds only to the uncoated portion of the electrode sheet, allowing localized pressurization exactly where thickness differences cause wrinkles. This targeted approach applies force only to the problematic uncoated area without affecting the coated portions, thereby maintaining flatness precisely where needed while enabling continuous transport.
2Manufacturing precision
If a pressure roll is added to pressurize the uncoated portion, then wrinkles and folds are prevented, but the device complexity increases
Solution Approach 1:
The system incorporates a level sensor that continuously detects the thickness or position of the uncoated portion as it passes through. This real-time feedback is processed by a control unit that automatically adjusts the pressure roll's position and pressing force, creating a closed-loop control system that maintains flatness dynamically without requiring complex manual intervention or overly sophisticated mechanisms.
Solution Approach 2:
The pressure roll is designed with movable support portions that can dynamically adjust their position along the electrode sheet width and height. This dynamic capability allows the pressure roll to adapt to variations in uncoated portion location and thickness in real-time, maintaining effective wrinkle prevention while using a relatively simple mechanical structure compared to fixed or multi-component systems.
3Device complexity
If the pressure roll is stationary, then the device structure is simpler, but it cannot effectively track and pressurize the uncoated portion when its position varies
Solution Approach 1:
The pressure roll incorporates movable support portions that can dynamically adjust their position along the electrode sheet width and height. This dynamic capability allows the pressure roll to adapt to variations in uncoated portion location and thickness in real-time, maintaining effective wrinkle prevention while using a relatively simple mechanical structure compared to fixed or multi-component systems.
Solution Approach 2:
The system incorporates a level sensor that continuously detects the thickness or position of the uncoated portion as it passes through. This real-time feedback is processed by a control unit that automatically adjusts the pressure roll's position and pressing force, creating a closed-loop control system that maintains flatness dynamically without requiring complex manual intervention or overly sophisticated 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
The apparatus effectively prevents wrinkles and folds in the uncoated portion, maintaining a defect-free state and enhancing productivity by quickly removing and preventing occurrences during the manufacturing process.
Implementation Method 1
at least one pressure roll in contact with the support roll with the electrode sheet disposed therebetween and pressurizing the uncoated portion
Implementation Method 2
a suction roll with symmetrical suction holes to maintain tension
Data Source
AI summary
An electrode manufacturing apparatus includes a support roll supporting an electrode sheet, at least one pressure roll, a level sensor, and a control unit. The electrode sheet includes a coated portion and an uncoated portion, and the support roll transports the electrode sheet in a first direction. The pressure roll contacts the support roll with the electrode sheet disposed therebetween and pressurizes the uncoated portion of the electrode sheet. The level sensor detects a level of the uncoated portion, and the control unit controls the pressure roll in response to the level detected by the level sensor. The at least one pressure roll is movable in a second direction crossing the first direction.