Electrode Stack Structure with Multiple Tabs for Flexible Battery Design
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Solution Overview
Problem
Conventional batteries lack flexibility, leading to potential failure when repeatedly bent or deformed, necessitating improved electrode structures for mobile electronic devices.
Innovation Solution
An electrode stack structure with multiple tabs, including a first and second tab of alternating polarity, connected by conductive joining units and electrode lines, which enhances flexibility and stability by allowing for electrical connections and stress distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a battery uses a conventional electrode structure with single tabs, then the manufacturing process is simple, but the battery lacks flexibility and fails when repeatedly bent or deformed
Solution Approach 1:
The electrode structure is segmented into multiple tabs (first tabs and second tabs) instead of using a single tab. Each tab can be independently connected to leads or joined to adjacent tabs, allowing the electrode assembly to flex and deform without compromising electrical connectivity or structural integrity
Solution Approach 2:
The electrode structure transitions from a two-dimensional planar configuration to a three-dimensional stacked arrangement with tabs extending in multiple directions. This multi-dimensional configuration allows the battery to accommodate bending and deformation while maintaining electrical pathways
2Reliability
If a battery uses multiple tabs with joining units and electrode lines, then flexibility and durability are improved, but the manufacturing complexity increases
Solution Approach 1:
Multiple tabs of the same polarity are joined together using joining units, merging their electrical pathways. This consolidation simplifies the connection to external circuits while distributing mechanical stress across multiple connection points, enhancing durability without proportionally increasing manufacturing complexity
Solution Approach 2:
Electrode lines serve as intermediaries connecting the tabs to the external circuit. These dedicated conductive pathways isolate the complex tab arrangement from the external connection requirements, allowing the battery to maintain flexibility while providing stable electrical connectivity
3Adaptability or versatility
If electrode layers are repeatedly bent, then the battery structure adapts to flexible applications, but the electrode structure deforms and the battery fails
Solution Approach 1:
The multiple tab configuration and joining units are designed beforehand to accommodate and cushion the effects of bending and deformation. When the battery is flexed, the tabs and joining units absorb and distribute the mechanical stress, preventing the electrode structure from deforming beyond failure points
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 electrode stack structure improves the flexibility and durability of batteries, maintaining performance even after repeated bending, as demonstrated by capacity retention in bending tests.
Implementation Method 1
second tabs of electrode layers having a same polarity are electrically connected to each other
Data Source
AI summary
An electrode stack structure including a plurality of stacked electrode layers including electrode layers having multiple tabs, wherein the multiple tabs include a first tab connected to a first lead; and a second tab that is spaced apart from the first tab, and wherein second tabs of electrode layers having a same polarity are electrically connected to each other.