Battery Cell Stacking with Fixed Table and Reciprocating Transfer
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Solution Overview
Problem
Existing Z-stacking type apparatuses for secondary batteries face issues with decreased productivity due to long operation times, vibration-induced precision loss, and misarrangement of electrodes during high-speed stacking, necessitating a solution that enhances speed and precision while minimizing vibration and maintaining positional accuracy.
Innovation Solution
A high-speed stacking apparatus with a separator folder that folds and feeds separators in a zigzag manner, utilizing a fixed stack table and rotationally reciprocating electrode transfer apparatuses with synchronized pulleys and actuators to maintain precise electrode alignment and minimize vibration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the operation speed of the apparatus is increased to reduce working time, then productivity is improved, but position precision is not secured due to rapid increase of vibration and noise
Solution Approach 1:
Instead of moving the heavy stack table horizontally to transfer electrodes, the invention inverts the approach by keeping the stack table fixed and moving the lighter electrode transfer apparatuses back and forth between the stack table and electrode feeders. This inversion reduces the mass being accelerated and decelerated, thereby reducing vibration while maintaining high stacking speed.
Solution Approach 2:
The invention segments the stacking system into a fixed stack table and separate movable electrode transfer apparatuses. By dividing the system into stationary and mobile components, the heavy stack table remains stable while the lighter transfer apparatuses handle the high-speed reciprocating motion, reducing overall vibration and improving position precision.
2Manufacturing precision
If the stage moves long distances to the left and right, then electrode stacking is achieved, but working time increases and productivity decreases
Solution Approach 1:
The invention inverts the traditional approach by keeping the stack table fixed and moving the electrode transfer apparatuses instead. This allows for shorter transfer distances and faster operation while maintaining stacking accuracy, thereby reducing working time and improving productivity.
Solution Approach 2:
The electrode transfer apparatuses are designed to reciprocate dynamically between the stack table and electrode feeders. This dynamic motion allows for efficient material transfer with optimized path length, reducing the time required for each stacking operation while maintaining precision through controlled movement.
3Ease of operation
If the stack table rotates or moves horizontally, then electrode transfer is facilitated, but misarrangement of electrodes occurs due to vibration
Solution Approach 1:
Instead of moving the stack table to facilitate electrode transfer, the invention inverts the approach by keeping the stack table fixed and moving the electrode transfer apparatuses. This inversion eliminates the misarrangement problem caused by stack table vibration while maintaining ease of electrode transfer through the movable transfer mechanism.
Solution Approach 2:
The electrode transfer apparatuses act as intermediaries between the fixed stack table and the electrode feeders. These intermediary devices handle the transfer motion and vibration isolation, protecting the electrode alignment precision while facilitating smooth electrode transfer operations.
Data Source
AI summary
A high-speed stacking apparatus for battery cell elements, and more particularly, a high-speed stacking apparatus for battery cell elements that includes a separator folder that folds and feeds a separator in a zigzag manner to a stack table while a side thereof rotationally reciprocates is disclosed.