Battery Cell Side-Surface Bend Screening for Resin Layer Seating
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Solution Overview
Problem
The existing methods for inspecting battery cells fail to effectively determine the quality based on the bent degree of the W-shaped bend on one side surface, leading to inconsistent heat dissipation performance and application of thermally conductive polymer resin in battery modules.
Innovation Solution
A battery cell inspection device and system that uses a scan device to obtain scan data, calculate bend values, and decide the quality of battery cells by determining whether the bend values and representative values are within predetermined reference values, ensuring consistent seating on the polymer resin layer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the bridge part is bent to make receiving parts contact, then the battery cell structure is formed, but a W-shaped bend is created on one side surface causing inconsistent heat dissipation
Solution Approach 1:
The patent applies preliminary action by pre-forming the pouch case with a predetermined curvature radius before inserting the electrode assembly. This preliminary shaping ensures that when the bridge part is bent, the receiving parts make contact without creating excessive W-shaped bends on the side surface, thus preventing inconsistent heat dissipation while maintaining structural formation
Solution Approach 2:
The patent changes the geometric parameter of the pouch case by specifying a predetermined curvature radius for the arc-shaped formation. This parameter control limits the degree of bending of the bridge part, ensuring that the W-shaped bend on the side surface remains within acceptable limits, thereby maintaining manufacturing precision while still forming the battery cell structure
2Productivity
If bend inspection is not performed, then production efficiency is maintained, but heat dissipation performance becomes inconsistent
Solution Approach 1:
The patent performs bend inspection at an early stage in the production process, before final assembly into battery modules. This preliminary inspection allows for early identification and sorting of battery cells with excessive W-shaped bends, ensuring heat dissipation reliability while maintaining overall production efficiency by preventing defective cells from progressing through the entire manufacturing cycle
Solution Approach 2:
The patent replaces complex mechanical measurement systems with a simplified inspection method that measures the distance between the side surface and a reference plane. This substitution maintains production efficiency by using a quick, easy measurement approach while still reliably identifying battery cells with excessive bends that would compromise heat dissipation performance
Data Source
AI summary
The present invention relates to a battery cell of a secondary battery, and more particularly, to a battery cell inspection device and system for deciding whether a battery cell is good or bad based on a bent degree of a bend formed on one side surface of the battery cell.