Electrode Assembly Packaging Structure for Battery Cell
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Solution Overview
Problem
The existing electrode assembly package structures face challenges in minimizing the impact of sealing sides on the length of the package, leading to reduced space utilization and potential deformation of the anode during packaging.
Innovation Solution
The proposed electrode assembly package structure incorporates a second sealing segment formed by folding a portion of the sealing side beyond the end of the package, which is sandwiched between the package side and the first sealing segment, reducing the length occupation and enhancing space utilization, while also incorporating a beveled edge and adhesive tape for insulation and structural integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the sealing side is extended to ensure proper sealing, then sealing reliability is improved, but the length occupation increases reducing space utilization
Solution Approach 1:
The sealing side extension portion is folded back along the length direction and positioned between the package side and the first sealing segment, effectively moving the sealing structure from a linear extension into a multi-dimensional configuration. This folding approach resolves the contradiction by maintaining sealing reliability through proper sealing contact while eliminating the length occupation problem that would otherwise reduce space utilization.
Solution Approach 2:
The second sealing segment is nested between the package side and the first sealing segment, creating a compact layered structure. This nesting configuration allows the sealing side to maintain its functional length for reliable sealing while occupying minimal space in the length direction, thereby resolving the contradiction between sealing reliability and space utilization.
2Length of moving object
If the sealing side extension portion is reduced to improve space utilization, then length occupation decreases, but sealing reliability may be compromised
Solution Approach 1:
By folding the sealing side extension portion back along the length direction, the invention creates a compact structure that maintains adequate sealing length while minimizing length occupation. The folded configuration ensures the sealing side retains sufficient functional length for reliable sealing without extending excessively in the length direction.
Solution Approach 2:
The sealing side is divided into distinct segments: the first sealing segment for primary sealing, the second sealing segment formed by folding, and the sealing side extension portion. This segmentation allows each part to fulfill specific functions - the first segment ensures sealing reliability while the folded second segment minimizes length occupation.
3Productivity
If the package structure is optimized for space utilization, then energy density improves, but the anode may deform during packaging
Solution Approach 1:
The folded second sealing segment and beveled edge structure provide protective cushioning for the anode during the packaging process. By configuring the sealing side to fold back and position between the package side and first sealing segment, the structure creates a protective arrangement that prevents direct contact and potential deformation of the anode, thereby maintaining anode structural stability while achieving compact packaging for improved energy density.
Solution Approach 2:
The second sealing segment acts as an intermediary structure between the package side and the first sealing segment, providing a protective buffer that prevents direct compression of the anode during packaging. This intermediary configuration allows the package to achieve compact dimensions for high energy density while the folded sealing structure absorbs and distributes packaging forces, preventing anode deformation.
Data Source
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AI summary
Embodiments of the present application provide an electrode assembly package structure, comprising a package side and a sealing side extending along the length of the electrode assembly package structure, wherein the sealing side includes a first sealing segment that abuts the package side and a second sealing segment that is between the package side and the first sealing segment. The purpose of the present application is to provide an electrode assembly package structure capable of reducing the influence of the sealing side on the length of the package structure and improving the space utilization in the length direction.