Battery Core Packaging Structure With Opposed Folded Seals
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Solution Overview
Problem
Miniaturization of lithium-ion batteries leads to poor stability of packaging structures, which is a challenge in ensuring effective packaging for battery cores.
Innovation Solution
A packaging structure with a double-concave or single-concave portion design, featuring folding sealing portions in opposite directions and adhesive bonding to reduce thickness and volume, enhancing stability and minimizing breakage risk.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If battery miniaturization is implemented, then battery size is reduced, but packaging structure stability deteriorates
Solution Approach 1:
The sealing portion is folded in opposite directions (first sealing portion folded away from second wall, second sealing portion folded toward second wall) to create a three-dimensional compact structure. This dimensional transformation reduces the thickness direction extension while maintaining sealing effectiveness, thereby improving packaging stability in miniaturized batteries without compromising structural integrity.
Solution Approach 2:
The folding configuration changes the spatial parameters of the sealing portion, reducing its extension in the thickness direction. By transforming the sealing portion from a planar extension to a folded three-dimensional structure, the packaging volume is reduced while the folded structure inherently provides greater rigidity and stability compared to a simple flat seal.
2Reliability
If sealing portion extends beyond battery core, then sealing effectiveness is improved, but space occupation increases
Solution Approach 1:
The sealing portion is folded back toward the battery core in the thickness direction, transforming from a linear extension into a compact three-dimensional structure. This allows the sealing portion to maintain adequate sealing coverage while occupying minimal additional space, effectively resolving the conflict between sealing effectiveness and space occupation.
Solution Approach 2:
The folded sealing portion is nested within or adjacent to the battery core structure rather than extending outward. The first and second sealing portions are folded to lie within the boundary defined by the first and second walls, creating a nested configuration that maximizes space utilization while maintaining sealing function.
3Stability of the object's composition
If folding thickness is reduced, then packaging stability is improved, but breakage probability of folded side increases
Solution Approach 1:
The sealing portion is designed with differentiated folding configurations at different locations. The first sealing portion is folded in one direction while the second sealing portion is folded in the opposite direction, creating localized structural variations that distribute stress and reduce the likelihood of breakage at any single folded location while maintaining overall thinness.
Data Source
AI summary
A packaging structure including an accommodating portion and a sealing portion is disclosed. The accommodating portion includes a first wall and a second wall facing each other, a first side wall connected to the first wall and the second wall, and, a second side wall connected to the first wall and the second wall. The second side wall intersects with the first side wall at a first side. The sealing portion includes a first sealing portion connected to the first side wall, a second sealing portion connected to the second side wall, and a third sealing portion connecting the first sealing portion and the second sealing portion. The first sealing portion is folded in a direction away from the second wall. The second sealing portion is folded toward the second wall.