Separator Path Compensation in Electrode Assembly Folding
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Solution Overview
Problem
Existing electrode assembly manufacturing processes face challenges in maintaining consistent tension and length of separators during the folding process, leading to potential deviations that affect the quality of the electrode assembly.
Innovation Solution
An apparatus and method that utilize a control unit to manage a compensation unit, adjusting the movement of a dancer roller based on structural and motion parameters to compensate for changes in the length of the separator path, ensuring consistent tension by actively controlling the movement of the folding unit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If the folding unit moves to fold the separator, then the separator is folded into stack structure, but the movement path length of the separator changes causing tension deviation
Solution Approach 1:
The control unit calculates the actual movement path length of the separator based on the position of the folding unit and compares it with the reference value. Based on this feedback, the control unit adjusts the speed of the separator supply unit in real-time to compensate for path length changes, thereby maintaining constant separator tension during the folding process.
Solution Approach 2:
The system dynamically changes the operational parameters (speed of separator supply unit) based on the calculated movement path length. By adjusting the supply speed according to the folding unit's position, the system compensates for variations in separator path length and maintains consistent tension throughout the folding process.
2Productivity
If the separator supply unit supplies separator continuously, then manufacturing productivity is improved, but tension control becomes difficult due to changing movement path length
Solution Approach 1:
The system transitions from a static separator supply speed to a dynamic speed control mechanism. The separator supply unit's speed is continuously adjusted based on the folding unit's position and the calculated movement path length, allowing the system to maintain both high productivity and precise tension control throughout the manufacturing process.
Solution Approach 2:
The control unit continuously monitors the folding unit's position and calculates the corresponding separator movement path length. This feedback information is used to dynamically adjust the separator supply speed, ensuring that the separator is supplied at the optimal rate to maintain constant tension while preserving manufacturing efficiency.
3Shape
If the folding unit reciprocates between first point and second point, then the separator is folded completely, but the control length changes requiring active compensation
Solution Approach 1:
The system replaces complex mechanical compensation mechanisms with a control-based approach. The control unit calculates the movement path length based on the folding unit's position and adjusts the separator supply speed through electronic control, achieving compensation without additional complex mechanical components.
Solution Approach 2:
The control system uses information about the folding unit's position (which is already available for controlling the folding motion) to automatically calculate and compensate for movement path length changes. The system serves itself by utilizing existing control data for tension compensation purposes.
Data Source
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AI summary
An apparatus for manufacturing an electrode assembly formed in a stack structure of an electrode plate and a separator includes a separator supply unit configured to supply the separator, a folding unit that moves with respect to a stack table to fold the separator on the stack table, a guide unit provided on a movement path of the separator from the separator supply unit to the folding unit to guide movement of the separator, a compensator unit that is movable to compensate for a change in length of the movement path of the separator, and a controller unit configured to control movement of the compensator unit based on structural parameters for a structure of the apparatus and motion parameters for a motion of the folding unit to compensate for the change in length of the movement path of the separator.