Insulating Cover Bevels for Battery Insertion
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Solution Overview
Problem
Existing electric storage devices, such as lithium secondary battery cells and capacitors, face issues with the electrode assembly tilting during insertion into the case due to friction resistance, leading to improper positioning and difficulties in attaching the cover plate.
Innovation Solution
The electric storage device features an insulating cover formed into a rectangular box shape with beveled edges, allowing smooth insertion and positioning of the electrode assembly within the case, and includes a current collector system with flaps to prevent damage and ensure proper alignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the insulating cover is inserted into the case with projecting sides to reduce friction, then the insertion smoothness is improved, but the electrode assembly cannot be positioned in place and may tilt
Solution Approach 1:
The insulating cover is divided into different functional regions: projecting sides for friction reduction and positioning parts (such as positioning protrusions or guide edges) for accurate placement. This segmentation allows each region to perform its specific function independently, resolving the contradiction between smooth insertion and precise positioning.
Solution Approach 2:
The insulating cover acts as an intermediary component between the electrode assembly and the case. By designing the cover with both friction-reducing projecting sides and positioning features, it mediates between the need for easy insertion and the requirement for accurate positioning, preventing the electrode assembly from tilting while maintaining smooth insertion.
2Ease of operation
If the electrode assembly is allowed to tilt during insertion, then the insertion process becomes easier, but the cover plate attachment becomes troublesome
Solution Approach 1:
The insulating cover is designed with positioning features that preliminarily secure the electrode assembly in the correct position during insertion. This preliminary positioning action prevents tilting before the cover plate attachment process begins, ensuring that the electrode assembly is properly aligned when the cover plate is attached, thus maintaining ease of manufacture.
3Reliability
If spaces are formed by projecting sides to prevent hitting inner walls, then the insertion reliability is improved, but the electrode assembly positioning stability deteriorates
Solution Approach 1:
The insulating cover exhibits local quality variations: projecting sides provide clearance spaces for reliable insertion without hitting inner walls, while specific localized features (such as positioning protrusions or constrained edges) provide stable positioning. This local differentiation of properties resolves the contradiction between insertion reliability and positioning stability.
Data Source
AI summary
An electric storage device includes an electrode assembly, an insulating cover covering the electrode assembly, and a case including a case body having a rectangular box shape and including an opening, the case body being configured to house the electrode assembly and the insulating cover. The insulating cover is formed into a rectangular box shape conforming to the case body. An embossing is applied to the insulating cover.