Pouch Battery Electrode Fixing Structure With Low Electrolyte Impregnation
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Solution Overview
Problem
Conventional rechargeable batteries face issues with electrode plate damage and excessive electrolyte impregnation due to the adhesive tape, leading to reduced durability.
Innovation Solution
A rechargeable battery design featuring a quadrangle ring-shaped fixing tape that minimizes the area of tape attachment to the electrode assembly, using multiple tapes with varying widths to stabilize the assembly and reduce electrolyte impregnation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If conventional adhesive tape is used to fix the electrode assembly, then the electrode assembly is secured, but the adhesive damages the electrode plate and causes excessive electrolyte impregnation
Solution Approach 1:
The harmful adhesive layer is completely removed from the fixing tape. The patent uses a non-adhesive fixing tape that secures the electrode assembly through mechanical friction and pressure alone, eliminating the source of electrode plate damage and excessive electrolyte impregnation caused by conventional adhesive tapes.
Solution Approach 2:
The patent changes the surface properties of the fixing tape from adhesive to non-adhesive. By modifying the tape's surface characteristics to rely on friction-based fixation rather than chemical adhesion, the solution eliminates harmful interactions with the electrode plates while maintaining assembly stability.
2Stability of the object's composition
If tape is attached to the electrode assembly, then the assembly is fixed, but the attachment area increases electrolyte impregnation
Solution Approach 1:
The adhesive layer that causes excessive electrolyte absorption is removed entirely. The non-adhesive fixing tape minimizes electrolyte impregnation by eliminating the porous adhesive material that would otherwise absorb and retain excessive electrolyte, thereby reducing the quantity of impregnated electrolyte.
3Stability of the object's composition
If adhesive tape is used to secure the electrode assembly, then the assembly is fixed, but the adhesive contaminates the electrode plate
Solution Approach 1:
The adhesive substance is completely extracted from the fixing tape design. The non-adhesive tape eliminates contamination risks by using only inert, non-migrating materials that cannot transfer substances to the electrode plates, thereby preventing adhesive contamination.
Solution Approach 2:
The fixing tape is designed as a simple, inert component that does not interact chemically with the electrode assembly. By using a disposable, non-adhesive tape made from stable materials, the solution prevents contamination without requiring complex reusable systems.
Data Source
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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.