Pouch Battery Electrode Fixation With Minimal Tape Contact
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Solution Overview
Problem
Conventional rechargeable batteries face issues with electrode plate damage and excessive electrolyte impregnation due to adhesive attachment, leading to reduced durability.
Innovation Solution
The electrode assembly is stabilized using a fixing member in the form of quadrangle ring-shaped tapes that minimize the area of tape attachment, reducing electrolyte impregnation and preventing contamination or damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If conventional adhesive tape is used to attach to the electrode assembly, then the electrode assembly is fixed, but the adhesive damages the electrode plate and causes excessive electrolyte impregnation
Solution Approach 1:
The fixing member is divided into multiple separate tapes (first tape, second tape, and side surface tape) that are positioned at different locations on the electrode assembly. This segmentation allows the fixing function to be distributed, minimizing the area of contact with the electrode plate and reducing both adhesive damage and electrolyte impregnation at any single location while still providing stable fixation.
2Stability of the object's composition
If tape is attached to the electrode assembly, then the electrode assembly is secured, but the attachment area increases leading to more electrolyte impregnation
Solution Approach 1:
The fixing tapes are strategically positioned only at critical locations where fixation is most needed (opposing side surfaces and connecting positions), rather than covering the entire electrode assembly. This localized approach provides sufficient structural stability while minimizing the total attachment area, thereby reducing electrolyte impregnation to the essential minimum required for fixation.
Data Source
AI summary
A rechargeable battery is disclosed. The rechargeable battery includes an electrode assembly in which a first electrode plate and a second electrode plate are stacked with a separator interposed therebetween. The rechargeable battery also includes a pouch accommodating the electrode assembly. A pair of fixing members fix opposing two side surfaces of the electrode assembly in the stacking direction.