Insulation Holder Corner Thinning for Smooth Battery Cell Insertion
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Solution Overview
Problem
The frequent breakage of insulation holders during the insertion of electrode bodies into case bodies in electricity storage devices leads to reduced production efficiency and yield, as friction causes the insulation holders to break, potentially exposing the electrode body and leading to conduction with the case.
Innovation Solution
The insulation holder is designed with thin portions at its corners and edges, allowing for inward deformation when encountering the case body, thereby reducing friction-induced breakage by eliminating interference and facilitating smooth insertion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the insulation holder is inserted into the case body during manufacturing, then the electrode body is housed in the case, but friction causes breakage of the insulation holder
Solution Approach 1:
The patent applies local quality by creating thin portions at specific locations (corners and edges) of the insulation holder. These localized thin portions have different thickness properties than the main body, allowing them to deform preferentially during insertion to reduce friction and prevent breakage, while the rest of the insulation holder maintains its structural integrity.
2Ease of manufacture
If the insulation holder is made with uniform thickness, then manufacturing is simplified, but corners and edges cause friction and breakage during insertion
Solution Approach 1:
The patent introduces local variations in thickness by creating thin portions at corners and edges. This allows the insulation holder to have a simple box-shaped overall structure while incorporating localized thin regions that reduce friction during insertion, thereby preventing breakage without significantly complicating the manufacturing process.
Solution Approach 2:
The patent converts the potentially harmful sharp corners and edges into beneficial features by creating thin portions at these locations. The thin portions allow controlled deformation that reduces friction during insertion, transforming what would be breakage-prone sharp features into friction-reducing elements that facilitate smooth insertion.
3Productivity
If frequent breakage of insulation holders occurs, then production efficiency is reduced, but adding detection steps increases manufacturing complexity
Solution Approach 1:
The patent applies preliminary action by creating thin portions in the insulation holder design before the insertion process. This preventive design feature eliminates the need for post-insertion detection and handling of broken holders, thereby maintaining high production efficiency without adding complex detection systems or processes.
Data Source
AI summary
An insulation holder disclosed herein is an insulating box-shaped body to house an electrode body of an electricity storage device. The insulation holder includes: a bottom face having a rectangular shape in a plan view; a pair of first side faces extending upward from the bottom face; and a pair of second side faces extending upward from the bottom face. The insulation holder is provided on its bottom side with corners. The corners are included in areas defined in the insulation holder. The areas are provided with thin portions.