Battery Cell Bending Apparatus with Heating Members
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Solution Overview
Problem
Pouch-shaped batteries experience dimensional errors due to the restoration of bent regions over time, necessitating repeated bending processes, which complicates manufacturing and affects yield and external appearance.
Innovation Solution
A battery cell bending device with heating members that simultaneously bends and heats the outer edges of the battery cell to ensure tight contact with the electrode assembly receiving part, preventing dimensional errors and simplifying the bending process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If bending is performed without heating, then the bending process is simple, but the bent regions restore to original shape over time causing dimensional errors
Solution Approach 1:
The patent applies heating to change the physical state of the battery case material during bending, making it more pliable and preventing restoration. This parameter change (temperature) resolves the contradiction by enabling permanent deformation without increasing overall process complexity
Solution Approach 2:
The heating is applied before and during the bending action to prepare the material in advance for deformation. This preliminary heating action prevents the material from restoring to its original shape, thereby ensuring dimensional accuracy without requiring complex post-processing
2Manufacturing precision
If repeated bending processes are performed to correct dimensional errors, then manufacturing precision improves, but productivity decreases and manufacturing complexity increases
Solution Approach 1:
Heating is applied in advance during the bending process to ensure the material remains pliable and does not restore to its original shape. This preliminary thermal treatment eliminates the need for repeated bending operations, thereby maintaining high productivity while achieving accurate dimensions
Solution Approach 2:
By changing the temperature parameter during bending, the patent ensures permanent deformation of the battery case edges. This single-step heated bending process replaces multiple cooling and re-bending cycles, significantly improving manufacturing efficiency
3Manufacturing precision
If heating is applied during bending, then dimensional accuracy is maintained by preventing restoration, but device complexity increases
Solution Approach 1:
The heating function is merged with the bending operation, allowing both thermal treatment and mechanical deformation to occur simultaneously in one integrated process. This combination prevents material restoration during bending without requiring separate heating and bending equipment, thereby limiting the increase in device complexity
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
The device effectively prevents restoration of bent regions, ensuring accurate dimensions and simplifying the manufacturing process while improving yield and external appearance.
Implementation Method 1
heating members disposed adjacent to the pressing rollers for heating the bent outer edges of the battery case
Data Source
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AI summary
Disclosed herein is a battery cell bending device for bending outer edges of a battery cell configured to have a structure in which an electrode assembly including a positive electrode, a separator, and a negative electrode is mounted in a battery case, and the battery case is sealed by thermal bonding, the battery cell bending device including a base plate, on which the battery cell is loaded, a pair of bending guides inserted respectively between left and right outer edges of a battery case and an outer surface of an electrode assembly receiving part in a state in which the battery cell is loaded on the base plate, pressing rollers for pressing the outer edges of the battery case toward the bending guides to bend the outer edges of the battery case such that the outer edges of the battery case are adjacent to the outer surface of the electrode assembly receiving part, and heating members disposed adjacent to the pressing rollers for heating the bent outer edges of the battery case.