Cable Battery Compression Integrates Electrodes
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Solution Overview
Problem
Conventional cable-type secondary batteries face limitations in shape adaptability and performance due to uneven spaces between the separation layer and outer electrode, leading to poor flexibility and electrolyte distribution, which affects their capacity and cycle characteristics.
Innovation Solution
A cable-type secondary battery design that integrates a sheet-form laminate of separation layer and outer electrode through compression, ensuring uniform contact and minimizing ununiform spaces, allowing for easy shape change and improved stability and performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If a cable-type battery uses a polymer electrolyte to form an electrolyte layer, then the battery can achieve a linear structure, but the electrolyte inflow into the electrode active material is difficult, increasing resistance and deteriorating capacity and cycle characteristics
Solution Approach 1:
The patent changes the physical state of the electrolyte from solid polymer to liquid electrolyte solution, and changes the structure from layered to integrated laminate, thereby improving electrolyte distribution and electrochemical performance while maintaining the linear cable structure
Solution Approach 2:
The patent creates a composite laminate structure integrating the separation layer and outer electrode, combining different functional materials to achieve both structural integrity and optimal electrolyte distribution throughout the battery
2Ease of manufacture
If spaces are generated among the separation layer and outer electrode during preparation, then the battery structure is formed, but the electrolyte solution introduction into the outer electrode active material layer is disturbed, deteriorating battery performances
Solution Approach 1:
The patent merges the separation layer and outer electrode into a single integrated laminate structure, eliminating the spaces that would otherwise form between separate components, thereby ensuring uniform electrolyte distribution and improved battery performance
3Ease of manufacture
If conventional cylindrical or prismatic structures are used, then the battery can be manufactured with standard processes, but the battery cannot freely change in shape, limiting adaptability in mobile devices
Solution Approach 1:
The patent creates a dynamic, flexible cable-type structure that can be configured in various shapes and arrangements, moving away from fixed cylindrical or prismatic forms to enable adaptability in different mobile device applications
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 integration of the separation layer and outer electrode enhances electrolyte distribution, reduces internal resistance, and improves the battery's flexibility and performance, enabling uniform supply of the electrolyte solution to the outer electrode active material layer.
Implementation Method 1
the laminate being formed by carrying out compression for the integration of a separation layer for preventing a short circuit, and an outer electrode
Implementation Method 2
allowing for the separation layer coming into contact with the outer electrode to absorb an electrolyte solution, thereby inducing the uniform supply of the electrolyte solution into the outer electrode active material layer
Data Source
AI summary
The present disclosure provides a cable-type secondary battery, comprising: an inner electrode; and a sheet-form laminate of separation layer-outer electrode, spirally wound to surround the outer surface of the inner electrode, the laminate being formed by carrying out compression for the integration of a separation layer for preventing a short circuit, and an outer electrode.According to the present disclosure, the electrodes and the separation layer are compressed and integrated to minimize ununiform spaces between the separation layer and the outer electrode and reduce the thickness of a battery to be prepared, thereby decreasing resistance and improving ionic conductivity within the battery. Also, the separation layer coming into contact with the electrodes absorbs an electrolyte solution to induce the uniform supply of the electrolyte solution into the outer electrode active material layer, thereby enhancing the stability and performances of the cable-type secondary battery.