Pouch Battery Tape Layout to Prevent Corner Overlap Thickness
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Solution Overview
Problem
Existing secondary batteries face an issue of increased thickness due to overlapping tapes attached to 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 design without increasing the overall thickness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If tapes are attached to the case for insulation, then insulation reliability is improved, but the battery thickness increases
Solution Approach 1:
The patent transitions from a two-dimensional tape attachment approach (front and side surfaces separately) to a three-dimensional integrated solution where the first tape wraps around the corner region, utilizing the vertical dimension to provide continuous insulation without overlapping layers, thereby maintaining thin profile while ensuring insulation reliability
2Stability of the object's composition
If tapes are attached to secure the case structure, then structural stability is improved, but the overall thickness increases due to overlap
Solution Approach 1:
The patent merges the functions of multiple tapes into a single integrated first tape that simultaneously provides both insulation and structural reinforcement at the corner region, eliminating the need for overlapping second tape and achieving structural stability without increased thickness
Data Source
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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.