Pouch Cell Case Tape Segmentation for Insulation Without Bulk
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Secondary batteries face issues with increased thickness due to overlapping tapes on the case, which is disadvantageous for compact design.
Innovation Solution
The first and second tapes are designed to avoid overlapping in a specific region of the case, ensuring they do not overlap on the front surface, thereby maintaining a compact thickness without compromising insulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the first tape and second tape are attached to the case to ensure insulation, then insulation reliability is improved, but the battery thickness increases due to overlapping tapes
Solution Approach 1:
The battery case is divided into different regions (front surface region and side surface region) with different tape attachment configurations. In the front surface region, the first and second tapes do not overlap to reduce thickness, while in the side surface region, they overlap to ensure insulation. This spatial segmentation resolves the contradiction between insulation reliability and thickness.
Solution Approach 2:
Different tape attachment strategies are applied to different regions of the case. The front surface region uses a non-overlapping configuration for compactness, while the side surface region uses an overlapping configuration for insulation. This local differentiation allows each region to optimize for its specific functional requirements.
2Length of stationary object
If the first tape decreases in width in the first region to avoid overlapping, then battery thickness is reduced, but manufacturing complexity increases
Solution Approach 1:
The first tape is pre-designed with a tapered width configuration before attachment. The width gradually decreases in the first region to create a non-overlapping configuration with the second tape. This preliminary design simplifies the attachment process by eliminating the need for complex positioning adjustments during assembly.
Data Source
AI summary
A secondary battery is provided with secure insulation and no increased thickness. The secondary battery includes an electrode assembly, a pouch-type case accommodating the electrode assembly, a first tape attached to a side portion of the case, and a second tape attached to an upper portion of the case. The first tape and the second tape are formed so as to not overlap in a region corresponding to an upper corner of the case.