Battery Cell Pressing Assembly for Terrace Swelling Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The conventional apparatus for charging and discharging secondary batteries often results in swelling at the terrace area, leading to adhesive layer breakage and increased defect rates, as well as inefficiencies in cell insertion due to positional errors during the formation process.
Innovation Solution
An apparatus with movable press plates, gripper units, and push bar units that elastically press the terrace area, combined with a cell entry guide system to support and guide the cells accurately, preventing damage and improving insertion efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If press plates press only the body of the secondary battery cell during charging and discharging, then the cell body is constrained from swelling, but the terrace area swells due to increased internal pressure causing adhesive layer breakage
Solution Approach 1:
The pressing mechanism is divided into two independent components: press plates for pressing the cell body and push bar units for pressing the terrace area. This segmentation allows each component to independently address the swelling issue in its specific region without interfering with the other, thereby preventing adhesive layer breakage while maintaining cell body constraint.
Solution Approach 2:
The pressing force is differentiated by location: the press plates apply pressure to the cell body while the push bar units apply pressure specifically to the terrace area. This local quality approach ensures that each region receives the appropriate pressing force needed to prevent swelling, with the push bar units having elastic pressing portions that can adapt to the terrace area's specific requirements.
2Productivity
If transfer equipment places multiple secondary battery cells between press plates at once, then production efficiency is improved, but positional errors cause cells to touch the press plate top and fail to enter smoothly
Solution Approach 1:
Guide members are introduced as intermediary components between the transfer equipment and the press plates. These guide members receive the battery cells from the transfer equipment and guide them into the correct position between the press plates, preventing direct contact with the press plate top and ensuring smooth entry even when multiple cells are placed simultaneously.
Solution Approach 2:
The guide members perform preliminary positioning of the battery cells before they reach the press plates. By pre-aligning the cells in the correct position and orientation, the system prevents positional errors from causing insertion failures, thereby maintaining high production efficiency while ensuring accurate cell placement.
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
This solution significantly reduces the defect rate caused by swelling at the terrace area and enhances the efficiency of the cell insertion process by ensuring precise alignment and protection during charging and discharging.
Implementation Method 1
at least one push bar unit coupled with the at least one gripper unit, the at least one push bar unit extending to the cell insertion space and including a push bar pressing portion configured to elastically press a terrace area of the secondary battery cell
Data Source
AI summary
An apparatus includes a plurality of press plates arranged opposite each other with a cell insertion space therebetween into which a battery cell is insertable, and the plurality of press plates being movable towards each other to press a body of the battery cell, at least one gripper unit mounted on an upper edge of each press plate of the plurality of press plates, the at least one gripper unit extending to the cell insertion space, and the at least one gripper unit coming into contact with an electrode lead of the battery cell when adjacent press plates press the body of the battery cell, and at least one push bar unit coupled with the at least one gripper unit, the at least one push bar unit extending to the cell insertion space and including a push bar pressing portion to elastically press a terrace area of the battery cell.