Cable-Type Battery Parallel Electrodes Shape Adaptability
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Solution Overview
Problem
Existing secondary batteries are limited in shape adaptability and stability, making them unsuitable for various portable device applications, and they often suffer from short circuits due to electrode contact.
Innovation Solution
A cable-type secondary battery design featuring longitudinally extending anodes and cathodes with parallel arrangement, surrounded by multiple electrolyte layers and a protection coating, allowing for flexible shape adaptation and increased surface area to prevent short circuits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional cylindrical or prismatic battery structures are used, then manufacturing process is simplified, but shape adaptability is limited
Solution Approach 1:
The battery is divided into multiple electrode assemblies arranged in parallel, with each assembly consisting of alternating anodes and cathodes separated by separators. This segmentation allows the battery to achieve flexible linear shapes while maintaining manageable manufacturing complexity through modular assembly
Solution Approach 2:
The battery transitions from traditional three-dimensional cylindrical or prismatic shapes to a linear one-dimensional structure with high length-to-diameter ratio. This dimensional change enables shape adaptability for portable devices while simplifying the overall structural configuration
2Adaptability or versatility
If electrode assembly is mounted in predetermined casing, then manufacturing is easier, but shape flexibility is reduced
Solution Approach 1:
The battery adopts a flexible linear structure without rigid predetermined casing constraints, allowing the electrode assemblies to be arranged in flexible configurations. This enables shape adaptation to various portable devices while maintaining ease of manufacture through standardized electrode assembly components
3Quantity of substance
If electrodes are arranged closely to increase capacity, then energy density improves, but short circuit risk increases
Solution Approach 1:
Separators are introduced as intermediary components positioned between adjacent anodes and cathodes in parallel arrangement. These separators prevent direct contact and short circuits between electrodes while allowing close spacing to maintain high capacity and energy density
Solution Approach 2:
Multiple electrode assemblies with alternating anodes and cathodes are nested in a parallel configuration, with separators interposed between electrodes. This nested structure maximizes space utilization for high capacity while maintaining reliable electrical isolation through the separator layers
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 high rate performance and improved capacity balance through flexible design and multiple electrodes, reducing the likelihood of short circuits and enabling use in diverse portable devices.
Implementation Method 1
a first electrolyte layer surrounding the anode and serving as an ion channel, at least one cathode extending longitudinally... a second electrolyte layer serving as an ion channel commonly surrounding the anode and the cathode
Data Source
Figure 1~2
AI summary
Provided is a cable-type secondary battery including at least one anode extending longitudinally and having a horizontal cross section of a predetermined shape, a first electrolyte layer surrounding the anode and serving as an ion channel, at least one cathode extending longitudinally and having a horizontal cross section of a predetermined shape, the anode and the cathode arranged in parallel, a second electrolyte layer serving as an ion channel commonly surrounding the anode and the cathode, and a protection coating surrounding the second electrolyte layer. The cable-type secondary battery has free shape adaptation due to its linearity and flexibility. Introduction of the electrolyte layer on the electrode prevents a short circuit. The presence of a plurality of electrodes leads to an increased contact area therebetween and consequently a high battery rate. By adjusting the number of the anodes and the cathodes, it is easy to control the capacity balance therebetween.