Cable-Type Battery with Nested Electrodes for Shape Adaptability
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Solution Overview
Problem
Current secondary batteries are limited by their cylindrical, prismatic, or pouch shapes, which restrict their adaptability in various device forms and do not offer sufficient stability and performance for flexible applications.
Innovation Solution
A cable-type secondary battery design featuring parallel inner electrodes with an electrolyte layer and a tubular outer electrode, where the inner electrodes are spaced within the cathode or anode active material layer, providing a flexible and adaptable linear structure with enhanced contact area and capacity control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a cylindrical,prismatic,or pouch shape is used for secondary batteries, then the manufacturing process is simplified with a predetermined mounting space, but the adaptability to various device shapes is limited
Solution Approach 1:
The battery is divided into multiple unit batteries connected in series, with each unit having its own electrode assembly and electrolyte. This segmentation allows the battery to be configured in different shapes while maintaining manufacturing simplicity for each modular unit.
Solution Approach 2:
Multiple inner electrodes are nested within a single outer electrode structure, creating a compact multi-unit battery configuration that adapts to various shapes while simplifying the overall manufacturing process through integrated assembly.
2Device complexity
If a single anode and single cathode structure is used, then the battery structure is simple, but the capacity balance is insufficient
Solution Approach 1:
The battery uses multiple anodes and cathodes segmented into separate unit batteries, allowing independent optimization of each electrode's capacity to achieve better overall capacity balance while maintaining manageable structural complexity.
Solution Approach 2:
Multiple inner electrodes are nested within the outer electrode, creating a compact structure where multiple electrode pairs work together to achieve capacity balance without significantly increasing external dimensions or structural complexity.
3Reliability
If multiple anodes and cathodes are arranged in parallel, then the capacity balance improves, but the contact area and performance are reduced
Solution Approach 1:
Multiple inner electrodes are nested within the outer electrode, maximizing the contact area between electrodes by arranging them in a compact nested configuration rather than spreading them out in parallel, thereby improving both capacity balance and performance.
Solution Approach 2:
The electrodes are arranged in a three-dimensional nested configuration rather than a simple parallel arrangement, increasing the effective contact area through spatial optimization while maintaining capacity balance.
4Device complexity
If the electrolyte layer encompasses all electrodes, then the structure is simple, but short circuits may occur between inner electrodes
Solution Approach 1:
The electrolyte is segmented into separate layers for each unit battery, with each electrolyte layer confined to its respective anode and cathode pair. This segmentation prevents short circuits between inner electrodes while maintaining manageable structural complexity through modular design.
Solution Approach 2:
The electrolyte layer acts as an intermediary that is specifically positioned between each anode and its corresponding cathode, preventing direct contact between inner electrodes while enabling ionic conduction within each unit battery.
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 cable-type battery achieves high flexibility and adaptability, increased contact area for improved performance, and prevents short circuits through electrolyte layer separation, allowing for varied shapes and controlled capacity balance.
Implementation Method 1
the anodes having a respective electrolyte layer thereon serving as an ion channel
Data Source
Figure 1~2
AI summary
The present invention relates to a cable-type secondary battery comprising an inner electrode comprising at least two anodes arranged in parallel, the anode extending longitudinally and having a horizontal cross section of a predetermined shape, the anode having an electrolyte layer thereon serving as an ion channel; an outer electrode comprising a cathode including a cathode active material layer surrounding the inner electrode; and a protection coating surrounding the outer electrode. The cable-type secondary battery has free shape adaptation due to its linearity and flexibility. A plurality of inner electrodes within a tubular outer electrode lead to an increased contact area therebetween and consequently a high battery rate. It is easy to control the capacity balance between the inner and outer electrodes by adjusting the number of inner electrodes. A short circuit is prevented due to the electrolyte layer formed on the inner electrode.