Stacked Cell Separator Cutting for Stable Tension Control
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Solution Overview
Problem
The existing stacked cell manufacturing process in batteries is prone to unstable tension of the separator during the stacking process, leading to potential instability in the manufacturing of high-quality stacked cells.
Innovation Solution
A stacked cell manufacturing device that alternately stacks negative and positive electrode plates in the valley fold parts of a bellows-shaped folded separator, utilizing a separator feed unit, folding unit, electrode feed unit, and control unit to manage the separator tension and cutting process, ensuring stable stacking without additional operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the table for stacking moves in a direction different from the bending direction after stacking is completed, then the stacked body can be moved to avoid the standby stage, but the tension of the separator becomes unstable
Solution Approach 1:
The separator cutting unit performs the cutting action in advance while the table for stacking is still in the stacking position, before the table needs to move to a different direction. This preliminary cutting eliminates the need to move the completed stacked body in a direction that would cause separator tension instability, as the separator is already separated at the required position.
Solution Approach 2:
The separator cutting unit extracts and removes the separator from the stacking process at a specific point, separating it from the electrode plates before the table movement that would cause tension issues. This allows the table to move freely after stacking without affecting separator tension, as the separator has already been detached at the required position.
2Productivity
If the separator is cut after stacking is completed and the table moves to a different direction, then the stacking process can be finished, but the separator tension becomes unstable during the process
Solution Approach 1:
The separator cutting unit performs the cutting action in advance while the table for stacking is still in the stacking position, before the table needs to move to a different direction. This preliminary cutting eliminates the need to move the completed stacked body in a direction that would cause separator tension instability, as the separator is already separated at the required position.
3Ease of operation
If the table for stacking moves while avoiding the standby stage for positive electrode plate, then the stacking can be completed, but the separator tension becomes unstable
Solution Approach 1:
The separator cutting unit performs the cutting action in advance while the table for stacking is still in the stacking position, before the table needs to move to a different direction. This preliminary cutting eliminates the need to move the completed stacked body in a direction that would cause separator tension instability, as the separator is already separated at the required position.
Data Source
AI summary
After stacking of stacked cell is finished, the control unit performs a cutting process including allowing a separator cutting unit to cut a separator between a separator holding unit and a table for stacking in a state where the separator holding unit holds a lower surface of the separator between a separator roller and the table for stacking, moving the separator holding unit from below the separator roller to one side, and allowing to pass the separator to an upper surface of the table for stacking that has moved to the one side after the completed stacked cell is removed.