Cable-Type Battery Segmented Active Material Patterns
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Solution Overview
Problem
Existing secondary batteries are limited by their cylindrical, prismatic, or pouch shapes, which restrict their adaptability in shape and stability under external forces, leading to potential active material loss when deformed.
Innovation Solution
A cable-type secondary battery design featuring a wire-type anode current collector with spaced anode active material patterns, surrounded by an electrolyte layer and a cathode active material pattern layer on a pipe- or mesh-type cathode current collector, enhancing flexibility and preventing active material loss through differential deformation of patterned and non-patterned parts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a cable-type battery structure is adopted to improve shape adaptability, then flexibility and shape adaptability are improved, but the battery may deform under excessive external force causing active material to fall off
Solution Approach 1:
The active material layer is segmented into multiple patterns spaced apart from each other, creating discrete segments rather than a continuous layer. This segmentation allows each pattern to independently deform without causing the entire active material layer to fail, preventing material detachment while maintaining overall battery flexibility and shape adaptability.
Solution Approach 2:
The battery structure implements local quality by having active material patterns at specific locations rather than uniform coverage. The spaced-apart patterns create regions of different mechanical properties - the patterned areas provide structural stability while the spaces between patterns allow for deformation accommodation, enabling the battery to adapt to various shapes without compromising active material integrity.
2Ease of manufacture
If traditional cylindrical or prismatic battery structures are used, then manufacturing process is simplified, but shape adaptability is limited
Solution Approach 1:
The battery structure transitions from rigid cylindrical or prismatic forms to a dynamic cable-type configuration that can adapt its shape. The flexible cable structure with spaced active material patterns enables the battery to conform to different spatial requirements while maintaining manufacturability through standardized assembly processes, thus achieving both ease of manufacture and shape adaptability.
Solution Approach 2:
The battery employs a flexible cable-type structure with thin film characteristics, replacing traditional rigid metal casings. This flexible construction allows the battery to be bent, folded, or shaped into various configurations while maintaining structural integrity and enabling integration into diverse device forms, thereby significantly improving shape adaptability without complicating the manufacturing process.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The battery achieves improved flexibility and shape adaptability while preventing active material loss under external forces, maintaining performance and capacity by allowing non-patterned parts to deform before patterned parts, thus reducing the risk of material detachment.
Implementation Method 1
an electrolyte layer surrounding the anode active material pattern layer and serving as an ion channel
Data Source
Figure 1~2
Figure 3
AI summary
Provided is a cable-type secondary battery including an anode current collector having a horizontal cross section of a predetermined shape and extending longitudinally, an anode active material pattern layer having anode active material patterns spaced away at a predetermined interval on the anode current collector, an electrolyte layer surrounding the anode active material pattern layer and serving as an ion channel, a cathode active material pattern layer having cathode active material patterns spaced away at a predetermined interval on the electrolyte layer at locations corresponding to those of the anode active material patterns, and a cathode current collector surrounding the cathode active material pattern layer. The cable-type secondary battery having the active material patterns has excellent flexibility to prevent the active material from falling off from the active material layer.