Cable-Type Battery Segmented Electrodes Flexible Integration
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Solution Overview
Problem
Conventional secondary batteries with a plate-like electrode structure are inflexible and difficult to adapt to varying device shapes, limiting their use in innovative designs and wireless technologies due to structural constraints and sensitivity to volume changes during charging and discharging.
Innovation Solution
A cable-type secondary battery with a thin and long shape, featuring circular, asymmetrical oval, or polygonal cross-section electrodes and a separator or electrolyte layer, equipped with terminals and a housing cap that includes a coupling unit for secure attachment to devices, allowing for flexible integration and strong coupling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a conventional plate-like electrode structure is used, then high degree of integration is achieved, but adaptability to varying device shapes is poor
Solution Approach 1:
The electrode assembly is divided into multiple unit electrodes that can be independently arranged and configured. These segmented electrodes can be rolled or stacked in different patterns to create various battery shapes, enabling adaptation to different device form factors while maintaining integration efficiency
Solution Approach 2:
The battery structure transitions from a rigid plate-like configuration to a flexible cable-type design that can be dynamically shaped through rolling or stacking of electrode units. This dynamic configuration allows the battery to adapt its form to match various device contours and mounting spaces
2Adaptability or versatility
If a cable-type secondary battery with thin and long shape is used, then flexibility and adaptability are improved, but coupling strength to devices deteriorates
Solution Approach 1:
The housing cap is merged with a coupling unit that integrates directly with the battery terminals. This combination creates a unified structure that provides both the flexibility of the cable-type design and the mechanical strength needed for secure device coupling, eliminating the weakness of separate coupling components
Solution Approach 2:
The coupling unit is constructed using composite material structures that combine flexible elements for adaptability with rigid reinforcing elements for strength. This composite approach allows the coupling unit to maintain both flexibility for integration and sufficient mechanical strength for secure attachment
3Productivity
If plate-like electrodes are used, then manufacturing efficiency is high, but sensitivity to volume change during charging/discharging increases
Solution Approach 1:
The electrode assembly is enclosed in a flexible pouch-type casing that can accommodate volume changes of the electrodes during charging and discharging cycles. This flexible enclosure absorbs expansion and contraction forces, protecting the plate-like electrodes from mechanical stress while maintaining manufacturing efficiency
Data Source
AI summary
A cable-type secondary battery, includes an electrode assembly including first and second polarity electrodes with a thin and long shape, each electrode having a current collector whose cross-section perpendicular to its longitudinal direction is a circular, asymmetrical oval or polygonal shape, and an electrode active material applied onto the surface of the current collector, and a separator or an electrolyte layer interposed between the first and second polarity electrodes; and a cover member surrounding the electrode assembly. Also, the cable-type secondary battery is provided with a first polarity terminal and a second polarity terminal connected to the first polarity electrode and the second polarity electrode, respectively, at the end of the cable-type secondary battery; and a housing cap configured to fix the first and second polarity terminals and cover the end of the cable-type secondary battery.