Battery Cell Taping Portion Composite Layer Design
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Solution Overview
Problem
The challenge is to create a battery cell that can be miniaturized and made lighter while maintaining stability, as existing designs are limited by the reactivity of materials like lithium, which affects their size and weight.
Innovation Solution
The battery cell design includes an electrode assembly enclosed by a taping portion with a first adhesive layer, a first base layer of high elongation, and a second base layer of high tensile strength, along with a case and cap assembly, to enhance stability and prevent external impacts from causing short-circuits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If the battery cell is miniaturized and made lighter, then the size and weight are reduced, but the stability deteriorates due to the reactivity of materials like lithium
Solution Approach 1:
The taping portion is constructed as a composite structure with a first base layer (high elongation material) and a second base layer (high tensile strength material), combining materials with different properties to achieve both lightness and stability. This composite approach allows the battery cell to be miniaturized while maintaining structural integrity and impact resistance.
Solution Approach 2:
The taping portion uses a flexible film structure that wraps around the electrode assembly, providing protection against external impacts and penetration. The flexible nature of this thin film allows it to conform to the miniaturized battery cell geometry while maintaining stability and preventing short-circuits.
2Reliability
If the taping portion is made with multiple layers, then the stability and impact resistance are improved, but the device complexity increases
Solution Approach 1:
While the taping portion uses a composite multi-layer structure for improved stability, the overall device complexity is managed by integrating this composite layering into an existing single-layer taping configuration. The first and second base layers are stacked in a straightforward manner, and the adhesive layer provides simple bonding, minimizing the increase in structural complexity while achieving enhanced reliability.
Data Source
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AI summary
The present invention refers to a battery cell (100a) comprising an electrode assembly (110); a case (120) for receiving the electrode assembly (110); and a taping portion (130, 230, 330) enclosing an outer peripheral surface of the electrode assembly (110). The battery cell is characterized in that the taping portion (130, 230, 330) includes a first adhesive layer (133, 233, 333) positioned on the electrode assembly (110), a first base layer (132, 232, 332) positioned on the first adhesive layer (133, 233, 333), and a second base layer (131, 231, 331) positioned on the first base layer (132, 232, 332).