Roll Core Alignment Transfer for Eccentric Roll Centering
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Solution Overview
Problem
The existing methods for manufacturing secondary batteries, particularly lithium-ion batteries, face challenges in accurately centering and aligning rolls with eccentric positions, leading to increased defect rates and reduced reliability in the centering process.
Innovation Solution
A roll transfer device and method that utilize a combination of holding units, elevating units, alignment units, and transfer units to align and center rolls eccentrically positioned. The device includes LM guide rails, moving plates, and inner diameter detection sensors to precisely align the rolls by moving alignment units with different strokes based on detected roll diameters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If a cylinder is used to pressurize the roll core for centering work, then centering force is applied, but friction with the roll core and heavy load make it difficult to perform centering work reliably
Solution Approach 1:
The patent introduces an intermediary mechanism (the alignment unit with hand block and detection sensor system) between the pressurizing force and the roll core. Instead of directly pressurizing the roll core with a cylinder, the system uses detection sensors to measure roll position and control alignment units to adjust the roll's position indirectly, avoiding the friction and reliability issues of direct pressurization
Solution Approach 2:
The patent replaces the purely mechanical pressurization system (cylinder directly pressing roll core) with a sensor-based control system. Detection sensors measure the roll's position and inner diameter, and this information is used to control the alignment units, substituting mechanical force application with a measurement-and-control approach that eliminates friction-related reliability issues
2Ease of operation
If direct pressurization of roll core is used for centering, then centering work can be attempted, but friction and heavy load prevent accurate position recognition
Solution Approach 1:
The patent replaces direct mechanical pressurization with a sensor-based measurement system. Detection sensors are used to measure the roll's position and inner diameter without applying friction-inducing forces, enabling accurate position recognition while maintaining ease of operation through automated sensor-based centering
Solution Approach 2:
The system enables the roll to essentially center itself through the detection and control process. The detection sensors measure the roll's actual position and inner diameter, and this information is used to control the alignment units, allowing the system to automatically achieve centering without requiring complex manual pressurization operations
Data Source
AI summary
A roll transfer device is provided, which makes it convenient to perform a centering work of a roll stocked in a left or right eccentric state to increase reliability of the centering work of the roll. The roll transfer device comprises a plurality of frame units constituting an external appearance; a pair of holding units spaced apart from each other in a first direction inside the frame unit, supporting a roll core seated thereon; a pair of elevating units disposed on both upper sides in the first direction inside the frame unit to elevate a roll in a second direction and connected to each other by a first plate; a pair of alignment units provided on the first plate and disposed on both sides in the first direction to align a position of the roll in the first direction; and a pair of transfer units transferring the roll, in which the roll core is seated on the pair of holding units, in a third direction by simultaneously moving the pair of holding units in the third direction, wherein the pair of alignment units linearly move along the first direction with different strokes to align the roll, in which the roll core is seated on the pair of holding units, in the first direction while being eccentric along the first direction.