Flexible Rechargeable Battery Layered Structure Bending Resistance
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Solution Overview
Problem
Conventional pouch-type batteries are not flexible and can be damaged when repeatedly bent, experiencing compressive and tensile stress due to their inflexible nature.
Innovation Solution
A flexible rechargeable battery design featuring conductive substrates with layered structures, including resin layers, barrier layers, electrode current collector layers, and electrode coating layers, sealed with a sealant at edges to enhance flexibility and durability, allowing for repeated bending and folding without damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional pouch-type battery is used, then the battery structure is simple and easy to manufacture, but the battery cannot withstand repeated bending and folding, leading to damage
Solution Approach 1:
The battery structure is divided into multiple functional layers including resin layers, barrier layers, electrode current collector layers, and electrode coating layers. Each layer performs a specific function, collectively providing bending resistance while maintaining manufacturability through standardized layering processes
Solution Approach 2:
The patent employs composite material structures combining resin layers for flexibility, barrier layers for protection, and electrode layers for functionality. This multi-material composite approach enables the battery to withstand repeated bending while maintaining structural integrity and electrical performance
2Reliability
If the battery is made flexible with multiple layers, then bending resistance improves, but the manufacturing process becomes more complex
Solution Approach 1:
The battery is segmented into standardized functional layers that can be manufactured and assembled through systematic processes. This segmentation allows for specialized manufacturing of each layer type while maintaining overall production efficiency
Solution Approach 2:
The resin layers serve multiple functions including structural support, flexibility provision, and edge sealing integration. This multi-functionality reduces the need for separate components, thereby simplifying the overall manufacturing process despite the multi-layer structure
3Reliability
If the battery structure is simplified for easy manufacture, then manufacturing cost decreases, but the battery cannot maintain performance during repeated bending
Solution Approach 1:
The patent uses composite material structures where resin layers provide mechanical flexibility and structural stability, barrier layers provide protection, and electrode layers provide electrical functionality. This composite approach maintains performance stability during repeated bending while being manufacturable through established processes
Solution Approach 2:
The resin layers function as flexible shells that envelop and protect the electrode assembly. These flexible shell structures enable the battery to maintain its electrical and chemical performance during repeated bending and folding operations
Data Source
AI summary
A flexible rechargeable battery includes: a first conductive substrate; a second conductive substrate facing the first conductive substrate; and a sealant at edges of the first conductive substrate and the second conductive substrate. The first conductive substrate includes a first resin layer, a first barrier layer, a second resin layer, a first electrode current collector layer, and a first electrode coating layer that are sequentially stacked inward from a first side of the flexible rechargeable battery. The second conductive substrate includes a third resin layer, a second barrier layer, a fourth resin layer, a second electrode current collector layer, and a second electrode coating layer that are sequentially stacked inward from a second side of the flexible rechargeable battery.