Electrode Sheet Lifting with Staged Suction Plate Separation
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Solution Overview
Problem
Conventional methods for adsorbing and transferring sheet-shaped members, such as electrode sheets, face issues with adsorption failure, deformation, damage, and wrinkle formation due to face-to-face contact and edge curvature, particularly in the manufacturing of secondary batteries.
Innovation Solution
A lifting device comprising a main suction plate for central contact and a sub suction plate for edge contact, with a lifting unit that raises the sub suction plate before the main suction plate, along with a posture control unit to adjust to curvature, and a flattening unit to ensure accurate and damage-free adsorption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the adsorption force of the suction plate is increased to prevent adsorption failure, then the reliability of adsorption is improved, but the sheet-shaped member may be deformed or damaged
Solution Approach 1:
The suction plate is divided into a main suction plate for adsorbing the central portion and sub suction plates for adsorbing edge portions. This segmentation allows different regions to apply different adsorption forces, preventing overall force increase that would damage the sheet while ensuring reliable adsorption at critical edges
2Area of stationary object
If the flat suction plate is brought into close contact with the sheet-shaped member to adsorb it, then the adsorption area is increased, but wrinkles are caused or adsorption fails when the edge portion is curved
Solution Approach 1:
The sub suction plates are configured to follow and adapt to the curved edge portions of the sheet-shaped member. By positioning these plates at the curved edges rather than forcing a flat surface contact, the system maintains full surface contact and effective adsorption area even when the sheet edges are curved, preventing both wrinkle formation and adsorption failure
3Device complexity
If the sheet-shaped member is lifted without separating from the table first, then the lifting process is simplified, but adsorption failure occurs due to pressure from face-to-face contact
Solution Approach 1:
The lifting unit first raises the sub suction plates that are positioned at the edge portions before lifting the main suction plate. This preliminary action at the edges creates separation between the sheet and the table at the contact points, eliminating the pressure-induced adsorption failure that would occur with simultaneous lifting, while still maintaining a relatively simple overall lifting process
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 device enables precise and reliable adsorption and transfer of sheet-shaped members without deformation or damage, accommodating various sizes and curvatures, enhancing adsorption performance and reliability.
Implementation Method 1
a main suction plate configured to make surface contact with a central portion of the sheet-shaped member and adsorb the central portion; a sub suction plate configured to make surface contact with an edge portion of the sheet-shaped member located outside the central portion and adsorb the edge portion
Data Source
AI summary
Disclosed is a lifting device and an electrode sheet transfer apparatus using the same. The lifting device is a device for lifting a sheet-shaped member, and includes a main suction plate configured to make surface contact with a central portion of the sheet-shaped member and adsorb the central portion; a sub suction plate configured to make surface contact with an edge portion of the sheet-shaped member located outside the central portion and adsorb the edge portion; and a lifting unit connected to the main suction plate and the sub suction plate respectively to raise or lower the main suction plate and the sub suction plate, wherein the lifting unit is configured to lift the main suction plate and the sub suction plate when the main suction plate and the sub suction plate adsorb the sheet-shaped member, so that the sub suction plate is raised before the main suction plate.